Entries |
Document | Title | Date |
20080246472 | System and Method for Inductively Measuring the Bio-Impedance of a Conductive Tissue - System and method of inductively measuring the bio-impedance of a conductive tissue | 10-09-2008 |
20080315870 | Sensor Device, Sensor Arrangement, and Method of Measurement a Property of an Object - A sensor device measures a property of an object. The sensor device comprises a magnetic field generator adapted to generate a magnetic field in at least a part of the object, and at least one magnetic field detector adapted to detect at least one detection signal in response to the magnetic field generated in at least a part of the object. The at least one detection signal is indicative of the property of the object. A direct current or a direct voltage is applicable to the magnetic field generator to generate the magnetic field in at least a part of the object. | 12-25-2008 |
20090167299 | METAL DETECTION DEVICE - There is provided a metal detection device capable of effectively detecting a metal mixed in food or the like by generating AC magnetic field simultaneously tuned to respective frequencies by a single transmission coil in response to frequency components of different frequencies without switching an element by a switch or the like. Constituent elements constituting magnetic field generation means ( | 07-02-2009 |
20090167300 | MAGNETIC CRASH SENSOR - At least one time-varying signal is applied to a plurality of coil elements in cooperative relationship with and spanning different portions of a vehicle. The coil elements generate an associated plurality of magnetic field components that interact with the vehicle. At least one detection circuit generates a detected signal responsive to signal components from the coil elements so as to provide for detecting a change in a magnetic condition of the vehicle. | 07-02-2009 |
20090201016 | Apparatus and method for determining magnetic properties of materials - Apparatus for determining magnetic properties of materials comprises a portable probe ( | 08-13-2009 |
20090284255 | Magnetic Interference Detection System And Method - A system and method for tracking an object through a three dimensional space is provided that uses the generation and detection of various magnetic fields to provide three-dimensional location data. The integrity of the generated magnetic fields are monitored against a baseline in order to detect compromise by the unintentional introduction of a foreign metallic or magnetic object in the procedural space. | 11-19-2009 |
20090315546 | Magnetic Field Response Sensor For Conductive Media - A magnetic field response sensor comprises an inductor placed at a fixed separation distance from a conductive surface to address the low RF transmissivity of conductive surfaces. The minimum distance for separation is determined by the sensor response. The inductor should be separated from the conductive surface so that the response amplitude exceeds noise level by a recommended 10 dB. An embodiment for closed cavity measurements comprises a capacitor internal to said cavity and an inductor mounted external to the cavity and at a fixed distance from the cavity's wall. An additional embodiment includes a closed cavity configuration wherein multiple sensors and corresponding antenna are positioned inside the cavity, with the antenna and inductors maintained at a fixed distance from the cavity's wall. | 12-24-2009 |
20090322322 | SCANNING SUSCEPTOMETER - According to one embodiment, an apparatus comprises a magnet assembly to produce a static magnetic field and a set of high-T | 12-31-2009 |
20100045281 | ARRANGEMENT AND METHOD FOR DETECTING AND/OR LOCATING A MAGNETIC MATERIAL IN A REGION OF ACTION, USE OF AN ARRANGEMENT IN THE EXAMINATION OF BUILDINGS - An arrangement and a method for detecting and/or locating magnetic material, and the use of an arrangement in the examination of buildings is disclosed, which arrangement comprises: selection means for generating a magnetic selection field having a pattern in space of its magnetic field strength such that a first sub-zone having a low magnetic field strength and a second sub-zone having a higher magnetic field strength are formed in the region of action, drive means for changing the position in space of the two sub-zones in the region of action by means of a magnetic drive field so that the magnetization of the magnetic material changes locally, receiving means for acquiring detection signals, which detection signals depend on the magnetization in the region of action, which magnetization is influenced by the change in the position in space of the first and second sub-zone, wherein the magnetic selection field comprises at least a time-variable field component varying at a frequency of at least about 100 Hz. | 02-25-2010 |
20100052667 | ELECTROMAGNETIC INDUCTION TYPE INSPECTION DEVICE AND METHOD - Any inspection object regardless of material can easily be inspected or discriminated with high accuracy and high sensitivity by being placed in a magnetic field generated by applying an alternating current to an exciting coil and detecting changes of voltage level and phase of electromotive force induced by a detection coil unit. The discrimination of the inspection object is performed on the basis of a DC voltage value with respect to a standard specimen and a phase differential voltage value with respect to a phase difference between the phase of a voltage signal from the induction coil and the phase of the exciting current to the exciting coil. | 03-04-2010 |
20100052668 | ARRANGEMENT AND METHOD FOR INFLUENCING AND/OR DETECTING MAGNETIC PARTICLES IN A REGION OF ACTION - An arrangement and a method for influencing and/or detecting magnetic particles in a region of action is disclosed, which arrangement comprises:—selection means for generating a magnetic selection field having a pattern in space of its magnetic field strength such that a first sub-zone having a low magnetic field strength and a second sub-zone having a higher magnetic field strength are formed in the region of action,—drive means for changing the position in space of the two sub-zones in the region of action by means of a magnetic drive field so that the magnetization of the magnetic particles changes locally,—receiving means for acquiring signals, which signals depend on the magnetization in the region of action, which magnetization is influenced by the change in the position in space of the first and second sub-zone, wherein the selection means and/or the drive means and/or the receiving means comprises at least partially a litz wire/stranded wire. | 03-04-2010 |
20100079137 | METHOD AND APPARATUS FOR MEASUREMENT OF MAGNETIC PERMEABILITY OF A MATERIAL - A system for determining magnetic permeability of a material. Two electrical inductors formed as primary and secondary concentric coils share a common magnetic core space. A first AC voltage applied to the primary coil creates a magnetic flux in the core proportional to the magnetic permeability of the material. The magnetic flux induces an AC voltage in the secondary coil indicative of the apparent magnetic permeability of the sample. The apparent permeability is corrected for conductivity by imposing a second AC voltage and resistor in series across first and second electrodes disposed in the material. When the material is a magnetorheological fluid, the magnetic permeability is proportional to the concentration of magnetic particles in the sample and can be back-calculated from the amplitude of the secondary voltage signal. | 04-01-2010 |
20100117639 | ENDURANCE TESTING SYSTEM AND METHOD - An endurance testing system is configured to test endurance of a first detecting apparatus. The endurance testing system includes a second detecting apparatus, a movement module, a processor, and a storage module. The movement module includes a first inductive object and a second inductive object. The processor is connected to the first and second detecting apparatuses, and the movement module, for controlling the movement module and counting a first number of times the first detecting apparatus detects the first inductive object, and a second number of times the second detecting apparatus detects the second inductive object. The storage module is connected to the processor, for storing the first and second numbers of times from the processor. The first detecting apparatus fails the testing upon the condition that the first number of times is not equal to the second number of times. | 05-13-2010 |
20100134099 | Eddy Current Testing Method, Steel Pipe or Tube Tested by the Eddy Current Testing Method, and Eddy Current Testing Apparatus for Carrying out the Eddy Current Testing Method - It is an object of the present invention to provide an eddy current testing method capable of securely detecting a high hardness part locally occurring in a metal material having magnetism, and capable of securely checking whether the high hardness part has been removed after execution of a repairing treatment for removing the high hardness part. | 06-03-2010 |
20100141247 | CONSTANT CURRENT METAL DETECTOR WITH DRIVEN TRANSMIT COIL - A metal detector transmitting, through a transmit coil, a repeating transmit signal cycle, which includes at least one receive period and at least one non-zero transmit coil reactive voltage period; and sensing a current in the transmit coil during at least one receive period to control a magnitude and/or duration of the at least one non-zero transmit coil reactive voltage period such that the average value of the current during at least one receive period of every repeating transmit signal cycle is substantially constant, and the current during at least one receive period is substantially independent of the inductance of the transmit coil. | 06-10-2010 |
20100148768 | METHODS AND APPARATUS FOR PARTICLE DETECTION - A method of detecting the presence of a substance ( | 06-17-2010 |
20100148769 | NON-CONTACT PLASMA-MONITORING APPARATUS AND METHOD AND PLASMA PROCESSING APPARATUS - A non-contact plasma-monitoring apparatus and a non-contact plasma-monitoring method are provided. The non-contact plasma-monitoring apparatus is installed in a plasma processing apparatus including a processing chamber and a power supply unit and measures at least one of an electric field and a magnetic field, which are created around power supply wiring connecting the process chamber to the power supply unit, without physically contacting the power supply wiring. | 06-17-2010 |
20100164488 | ELECTROMAGNETIC PIEZOELECTRIC ACOUSTIC SENSOR - Provided is a remote sensing apparatus comprising: (a) an electromagnetic field detector and (b) an acoustic resonator comprising an electromagnetic field generator and a sensing material in wireless communication with the generator; wherein the sensing material is in wireless communication with the detector, and an acoustic property of the sensing material is responsive to a change in state of an environment to which the sensing material is exposed, and wherein the sensing material is in the form of one or more particles and/or fragments. | 07-01-2010 |
20100181998 | SENSOR COIL ARRAY FOR MAGNETIC INDUCTANCE TOMOGRAPHY WITH REDUCED MUTUAL COIL COUPLING - This invention relates to magnetic inductance tomography, and in particular, to coils of a sensor/driver cail array for use in a magnetic inductance tomography apparatus, in which driver/sensor coils are used to measure the induced flux in a conductive, dielectric and permittivity body, such as the human body. The sensor/driver coil array comprises at least one layer of thin coils whose centres are arranged on a regular grid, with adjacent coils overlapped by a suitable distance to cancel inductive neighbour coupling between them. | 07-22-2010 |
20100181999 | TAMPER-DETECTING ELECTRONIC SYSTEM - An apparatus for detecting tampering with an integrated circuit (IC), the apparatus comprising a second circuit comprising at least one conductor for conducting electrical current, the electrical current comprising, during at least one period of time, current of known strength, the electrical current generating a magnetic field, at least one magnetic field sensing device operatively associated with the IC, the sensing device having at least one electrical characteristic responsive to changes in a sensed magnetic field, the magnetic field sensing device being positioned so as to sense the magnetic field generated by current in the at least one conductor, and an analyzer operatively associated with the at least one magnetic field sensing device and the IC, the analyzer determining that the IC is being tampered with based, at least in part, on changes in the at least one electrical characteristic of the at least one magnetic field sensing device in response to changes in the sensed magnetic field generated by the electrical current in the at least one conductor during the at least one period of time. Related apparatus and methods are also described. | 07-22-2010 |
20100231208 | Vibration and condition monitoring system and the parts thereof - A vibration and condition monitoring system with true digital signal processing based design, with very limited analog based general signal conditioning and integrated specific sensor conditioning and sensor power supply options. The device supports direct connection of eddy current probe systems to the module, due to a built-in driver and linearization functionality. Linearization and compensation of a specific eddy current probe/cable system is done by measuring its far/infinite gap response. This response is then according to the invention recalculated into a linearization curve/transfer function. Specific sensor signal conditioning is not dependent on hardware, but only on embedded software (firmware). There is full sensor input support in an I.S. environment. Not only the common sensor input types from accelerometer, velocity sensor or eddy current probe system for both vibration and/or speed measurements. | 09-16-2010 |
20100231209 | Testing An Electrical Component - Testing an electrical component, the component including a printed circuit board (‘PCB’) with a number of traces, the traces organized in pairs with each trace of a pair carrying current in opposite directions and separated from one another by a substrate layer of the PCB, where testing of the electrical component includes: dynamically and iteratively until a present impedance for a pair of traces of the component is greater than a predetermined threshold impedance: increasing, by an impedance varying device at the behest of a testing device, magnetic field strength of a magnetic field applied to the pair of traces by the impedance varying device, including increasing the present impedance of the pair of traces; measuring, by the testing device, one or more operating parameters; and recording, by the testing device, the measurements of the operating parameters. | 09-16-2010 |
20100283455 | FREQUENCY SELECTION METHOD AND HARDENING DEPTH MEASUREMENT METHOD OF EDDY CURRENT MEASUREMENT - Disclosed is a method of appropriately and easily selecting a combination of two different frequencies of an AC exciting signal used for eddy current measurement while decreasing or removing the dependence of the measurement accuracy on temperature. Three or more AC exciting signals of different frequencies are applied to an object under measurement by an exciting coil, and an induced current is produced. Detection signals corresponding to the frequencies are detected by a detection coil, and the phase difference between each detection signal and the AC exciting signal corresponding to each frequency is calculated from the detection signals corresponding to the frequencies. From the phase differences, a combination of two frequencies the phase differences of which are within a predetermined range is extracted. The lower frequency of the extracted combination is used for a first frequency, and the higher one is used as a second frequency. Thus, the combination of two frequencies are selected. | 11-11-2010 |
20100301850 | METHOD AND DEVICE FOR ANALYSING A MAGNETIC MATERIAL, AND ANALYSER INCLUDING THE DEVICE - Disclosed is a method of analysing a magnetic material which includes the construction of a signature S(H) of the magnetic material formed from at least two points S(H) | 12-02-2010 |
20100308812 | Test Systems and Methods for Semiconductor Devices - Test structures, systems, and methods for semiconductor devices are disclosed. In one embodiment, a test structure for a semiconductor device includes a winding disposed in at least one conductive material layer of the semiconductor device. At least a portion of the winding extends proximate a perimeter of the semiconductor device. The winding includes a first end and a second end. A first test pad is coupled to the first end of the winding, and a second test pad is coupled to the second end of the winding. | 12-09-2010 |
20100315078 | METHOD FOR EVALUATING ELECTRODE MATERIAL, METHOD FOR PRODUCING ELECTRODE, AND APPARATUS FOR PRODUCING ELECTRODE - A method for evaluating an electrode material for a non-aqueous electrolyte secondary battery including the steps of: (A) vibrating an electrode material for a non-aqueous electrolyte secondary battery at a prescribed frequency successively in two or more levels of magnetic fields that have different magnetic flux densities; (B) detecting induced magnetizations that are synchronous with the vibrations generated in the electrode material; and (C) determining saturation magnetization of the electrode material from the induced magnetizations. | 12-16-2010 |
20100321011 | Method and system for inflight refueling of unmanned aerial vehicles - A system and method for refueling unmanned aerial vehicles. The system is adapted to refuel a first unmanned aerial vehicle from a second unmanned aerial vehicle and includes an arrangement for flying the first and second vehicles to proximity within a predetermined range and for connecting an umbilical from the second vehicle to the first vehicle in flight. In the illustrative embodiment, the arrangement for connecting includes a targeting system for electromagnetically detecting a refueling receptacle on the first vehicle. The targeting system includes a first coil around a refueling receptacle on the first vehicle. A seeker is disposed at a first end of said umbilical on the second vehicle. The seeker includes three detector coils adapted to detect a magnetic signal from the first coil around the receptacle on the first vehicle. The coils are mounted such that the detector coils point in different directions. The outputs of the coils are processed to determine the direction and range to the UAV from the tanker UAV. | 12-23-2010 |
20100321012 | DRIVE COIL, MEASUREMENT PROBE COMPRISING THE DRIVE COIL AND METHODS UTILIZING THE MEASUREMENT PROBE - The invention provides a drive coil and measurement probe comprising the drive coil. The measurement probes can be used, for example, in in-situ, non-destructive testing methods, also provided herein. | 12-23-2010 |
20110001472 | POSITIONING OF MAGNETIC COILS IN A SENSOR DEVICE - The invention provides for a method for determining the relative position of at least two magnetic actuator coils ( | 01-06-2011 |
20110006761 | Method and eddy current system for non-contact determination of interface resistance - The present invention is a method and an eddy current system for non-contact determination of the resistance between the current lead stripe and the coating during continuous fabrication of chemical power sources such as batteries, supercapacitors, photovoltaic modules and the like. Both the method and the non-destructive test system for practicing the method are described. The method includes placing of an integrated measuring transducer containing two strap-type eddy current probes above the surface of the coating applied to the metallic current lead stripe in the region of the shaft guiding the stripe movement, so that all the points of the operating surface of the transducer being at an equal distance from the stripe surface coating so that the two probes would take measurements on the same area of the coating. | 01-13-2011 |
20110037460 | Multiple receiver coil dual mode electromagnetic detector - An electromagnetic detection system comprising: a transmitter loop for generating a primary magnetic field, and a first pair of spaced apart receiver coils and second pair of spaced apart receiver coils for measuring a secondary magnetic field generated in response to the primary magnetic field. The transmitter loop drives the transmitter to generate the primary magnetic field. The system automatically switches between a first signal measuring mode and a second signal measuring mode, wherein in the first signal measuring mode a difference between signals induced in the receiver coils of the first pair is measured to provide a first receiver coil pair difference signal and a difference between the signals induced in the receiver coils of the second pair is measured to provide a second receiver coil pair difference signal, and in the second signal measuring mode a sum of the signals induced in the receiver coils of the first pair is measured to provide a first receiver coil pair sum signal and a sum of the signals induced in the receiver coils of the second pair is measured to provide a second receiver coil pair sum signal, and the difference between the first receiver coil pair signal and the second receiver coil pair signal is determined. | 02-17-2011 |
20110062954 | A PROBE FOR INSPECTING THE SURFACE OF A CIRCUMFERENTIAL SLOT IN A TURBOJET DISK BY MEANS OF EDDY CURRENTS - A probe for eddy current monitoring of the surface of a circumferential slot formed in a turbojet disk. The probe includes a stem fastened to a support and a first multi-element sensor constrained to move with the stem and configured to be inserted into the circumferential slot to perform the inspection, and a second multi-element sensor. The two multi-element sensors are disposed back to back, and the stem of the probe is mounted to pivot about its own axis to enable the two multi-element sensors to be inserted in the slot. | 03-17-2011 |
20110089938 | Device and Method for the Detection of Electrically Conducting Objects - The invention relates to a device for the detection of electrically conducting objects with: a first and a second coil, which can produce simultaneously magnetic fields with opposite polarity and a third coil which is arranged in the region of the opposing magnetic fields, and an electronic means, which during and/or after the supply of the first and second coils with a current pulse acquires an induction voltage in the third coil, or which, during the supply of the third coil with a current pulse, acquires an induction voltage in the first and second coils, so that an electrically conducting object produces a detectable signal in the acquired induction voltage when present in the range of one of the magnetic fields, wherein the current pulse comprises a step-shaped rise and/or a step-shaped fall, such as for example in the shape of a rectangular pulse. | 04-21-2011 |
20110095753 | Vibration and condition monitoring system and the parts thereof - A vibration and condition monitoring system and the parts thereof with a true digital signal processing based design, with very limited analog based general signal conditioning. Specifically a method of driving and a driver of eddy current probes that have a simple highly accurate analog part and a unit and a method of enabling efficient vibration monitoring in hazardous areas. This is achieved by an eddy current probe oscillator unit having independent control of an amplitude gain and control of an impedance measurement sensitivity, i.e. amplitude gain linearity in relation to probe impedance. | 04-28-2011 |
20110109307 | Digitally Operating Device for Detecting Metallically Conductive Parts - A facility for generating a detection signal upon the presence of metallic-conducting parts in a conveyed flow that is at least largely nonconductive, in which an alternating electromagnetic field is established in a section of the conveyed flow to be monitored by means of an alternating current generator via a transmitter coil system, whereby a variation of the signal of said field that is triggered by passage of a part is detected by a receiver coil system and serves, in conjunction with a downstream digital-type analytical circuit, for derivation of a detection signal which then triggers an information and/or elimination of said part. The receiver coil system has an analog-to-digital converter assigned to it and the transmission of the received signal to the analytical circuit proceeds in digital form. An analog-to-digital conversion is also provided for the signal of the alternating current generator and the received signal, being available in digital form, and the signal of the alternating current generator, also being available in digital form, are supplied to the analytical circuit for derivation of the detection signal. | 05-12-2011 |
20110127999 | PIPELINE INSPECTION APPARATUS AND METHOD - Apparatuses and methods for inspecting a section of piping are disclosed. In one example embodiment, an apparatus includes first and second excitation coils, a plurality of magnetometers, and a data acquisition system. The first excitation coils are disposed at a first axial location and are energized and the second excitation coils are disposed at a second axial location and are energized at an opposite polarity from the first excitation coil. The plurality of magnetometers are disposed at an axial location between the first and second axial locations and are positioned to detect magnetic fields generated by eddy currents induced in the section of piping by the first and second excitation coils. The data acquisition system is operatively connected to receive output data from the plurality of magnetometers. | 06-02-2011 |
20110133730 | Magnetic Probe Apparatus - A system and method for locating magnetic material. In one embodiment the system includes a magnetic probe; a power module in electrical communication with the magnetic probe to supply current to the magnetic probe; a sense module in electrical communication with the magnetic probe to receive signals from the magnetic probe; and a computer in electrical communication with the power module and the sense module. The computer generates a waveform that controls the supply of current from the power module and receives a signal from the sense module that indicates the presence of magnetic material. The magnetic probe is constructed from a material having a coefficient of thermal expansion of substantially 10 | 06-09-2011 |
20110133731 | METHOD AND DEVICE FOR MAGNETIC INDUCTION TOMOGRAPHY - This invention relates to a method and device for magnetic induction tomography. The device comprises a transmitting coil arrangement for generating a primary magnetic field, the primary magnetic field inducing an eddy current in an object of interest, and a measurement coil arrangement for measuring a secondary magnetic field generated by the eddy current to generate a set of measurement data used for image reconstruction of the object of interest, wherein the transmitting coil arrangement at least comprises a pair of transmitting coils intended for carrying substantially electrical currents flowing in the same direction and positioned symmetrically along a common axis and the measurement coil arrangement at least comprises a pair of measurement coils connected and positioned symmetrically along the axis. In an embodiment, the pair of transmitting coils and the pair of measurement coils are respectively Helmholtz coils. | 06-09-2011 |
20110148402 | INSPECTION MODE SWITCHING CIRCUIT - An eddy current probe testing apparatus structured to operate concurrently in a driver pick-up mode and said impedance mode is provided. The eddy current probe has two coils. The eddy current probe testing apparatus also includes a signal producing device, an output device, and a switch assembly. The switch assembly is structured to switch how an input signal from the signal producing device is provided to the two coils. | 06-23-2011 |
20110148403 | Magneto-electric sensor with injected up-conversion or down-conversion - A method includes generating an electrical signal representing a magnetic field using a magnetic field sensor having alternating layers of magneto-strictive material and piezo-electric material. The method also includes performing up-conversion or down-conversion so that the electrical signal representing the magnetic field has a higher or lower frequency than a frequency of the magnetic field. The up-conversion or down-conversion is performed before the magnetic field is converted into the electrical signal. The up-conversion or down-conversion could be performed by repeatedly sensitizing and desensitizing the magnetic field sensor. This could be done using a permanent magnet and an electromagnet, an electromagnet without a permanent magnet, or a movable permanent magnet. The up-conversion or down-conversion could also be performed by chopping the magnetic field. The chopping could involve intermittently shielding the magnetic field sensor from the magnetic field or moving the magnetic field sensor with respect to the magnetic field. | 06-23-2011 |
20110148404 | METHOD AND APPARATUS FOR EVALUATING LENGTH OF DEFECT IN EDDY CURRENT TESTING - The surface length of a metal subject to be inspected is evaluated by detecting an eddy current without using a combination of a scale and visual or liquid penetrant inspection. An exciting coil and a detecting coil are scanned above the subject in a length direction. An eddy current detector measures an output voltage corresponding to scanning positions based on an output from the detecting coil. Based on an output voltage distribution curve indicating a distribution of output voltages corresponding to the scanning positions, position information is extracted corresponding to values which are within a differential voltage range and lower by 12 dB than a maximum value of the output voltages on the left and right sides of the distribution. A distance between the positions included in the extracted information is calculated to evaluate the length of a slit which is a defect present on the subject surface. | 06-23-2011 |
20110148405 | MAGNETISM MEASURING METHOD AND DEVICE - A magnetism measuring method includes magnetizing a magnetic material with a direct current to a rotational magnetization region, performing an alternate current excitation in a direction having a component orthogonal to a direction of the direct current magnetization, and measuring a component of an alternate current magnetic field generated by an interaction with the magnetic material in a direction orthogonal to the direction of the direct current magnetization. | 06-23-2011 |
20110175602 | INDUCTORS WITH UNIFORM MAGNETIC FIELD STRENGTH IN THE NEAR-FIELD - An integrated inductor includes a plurality of coils. Each of the plurality of coils is electromagnetically coupled together to form an inductor between a first inductor terminal and a second inductor terminal. At least one of the plurality of coils is disposed in a layer on an integrated structure and at least another of one of the plurality of coils disposed in a layer of the integrated structure. One of the plurality of coils is spaced with respect to another of the plurality of coils to cause a substantially uniform magnetic field strength across a surface of the integrated inductor. An integrated magnetic particle sensor system, an integrated inductor having a section having a different width than another section, an integrated inductor having at least one gradual transition section, and an integrated inductor having at least one floating metal structure are also described. | 07-21-2011 |
20110210724 | Durability Enhanced and Redundant Embedded Sensors - A substantially planar eddy-current sensor having durability enhancing pillars in an active region is provided. The pillars are distributed and sized so as to have limited effect on the sensor's performance. When the sensor is mounted on a component such that the sensor experiences forces on a top and bottom surface, the pillars bear the load reducing the load bore by the active elements (e.g., drive winding, sense elements). A sensor with redundant drive windings and/or redundant sense elements is disclosed. The redundant elements may be connected to separate electronics. Another aspect relates to providing a reference transformer for calibration of a sensor. The secondary windings of the reference transformer are connected in series with the sense elements of the sensor to be calibrated. Transimpedance measurements are made when the drive winding of the reference transformer is excited. The measurements are used to correct transimpedance measurements made when the drive winding of the sensor is excited. A system having an impedance analyzer and a plurality of multiplexing units is disclosed for monitoring a plurality of sensor. Each multiplexing units directs an excitation signal to the drive winding of a respective sensor and returns, serially, the sense element responses back to the impedance analyzer. The system coordinates the excitation of each sensor and return of the sensor response to share a serial network. The multiplexing units may have a reference transformer for calibration of their respective sensors. Optical communication may be used. | 09-01-2011 |
20110234214 | METAL DETECTOR SENSOR HEAD - A metal detector includes means for reducing the induction of eddy currents in conductive elements of a sensor head. The aim of this invention is to remove the effect of small pieces of conductive material, located within or close to the sensor head, being seen as sought targets as the sensor head is moved over magnetic matrix. The means is to surround the conductive material with material with high magnetic permeability and low losses in a time-varying magnetic field, say low-loss ferrite. This will prevent the reflected field from illuminating the conductive material so eddy currents are not generated. | 09-29-2011 |
20110241661 | BEARING RESIDUAL LIFE PREDICTION METHOD, BEARING RESIDUAL LIFE DIAGNOSTIC APPARATUS AND BEARING DIAGNOSTIC SYSTEM - A bearing residual life prediction method, a bearing residual life diagnostic apparatus and a bearing diagnostic system can be provided. The bearing diagnostic system | 10-06-2011 |
20110304327 | MAGNETIC FIELD CURRENT SENSORS - Magnetic field current sensing devices, systems and methods are disclosed. In an embodiment, a current sensor includes a semiconductor die; an isolation layer disposed on the semiconductor die; at least one anchor pad disposed on the isolation layer; a current input and a current output galvanically isolated from the semiconductor die; at least one bond wire coupled to the current input and the current output, a longitudinal portion of the at least one bond wire disposed between the current input and the current output being stitched to the at least one anchor pad; and at least one sensor element arranged to sense a magnetic field induced by a current flowing in the at least one bond wire. | 12-15-2011 |
20110309828 | METHOD FOR MEASURING SLOW ROLL CHARACTERISTICS OF PARTIALLY MACHINED SHAFT OF AN ELECTRODYNAMIC MACHINE - An electrodynamic machine shaft slow roll measurement testing and remediation method that can be performed on a partially machined shaft. Upon completion of slow roll tests on a partially machined shaft the manufacturer may complete machining of shafts that successfully meet the test specification. If a partially machined shaft fails the test specification, the manufacturer at its option may attempt to remediate the shaft, so that it successfully meets slow roll specification upon re-testing. Exemplary remediation steps may include further concentricity machining to reduce mechanical runout or shaft treatment, such as by heating and/or quenching to reduce electrical runout. Partially machined shafts that fail slow roll test specifications (with or without remediation efforts) may be scrapped or otherwise recycled without, completing final machining operations. | 12-22-2011 |
20120007595 | 2D COIL AND A METHOD OF OBTAINING EC RESPONSE OF 3D COILS USING THE 2D COIL CONFIGURATION - The invention herein disclosed provides a 2D coil and a method of using the 2D wound EC sensor for reproducing the Eddy Current Testing (ECT) response of a prior art 3D orthogonal sensor. The 3D orthogonal sensor is conventionally wound onto a 3D core, with at least some of the surfaces being un-parallel to the surface be inspected. Using the herein disclosed 2D configuration allows the use of printed circuit board technologies for the manufacturing of these EC sensors. The herein disclosed method and the associated 2D EC sensors are particularly useful for reproducing the EC effect of conventional orthogonal probe arrays. | 01-12-2012 |
20120019237 | BLADE TIP CLEARANCE MEASUREMENT SENSOR AND METHOD FOR GAS TURBINE ENGINES - An electromagnetic field sensor assembly for blade tip clearance measurement in a gas turbine engine is disclosed that includes a ceramic sensor body, a multi-layered wire coil wound about a distal end portion of the sensor body for producing an electromagnetic field, a ceramic well enclosing the sensor body and the coil, and a metallic housing surrounding the well and having an open distal end. | 01-26-2012 |
20120019238 | MAGNETIC INDUCTION TOMOGRAPHY SYSTEMS WITH COIL CONFIGURATION - A magnetic impedance tomography system comprises an excitation system with several excitation coils to generate an excitation magnetic field to induce eddy currents in an examination volume. For example, a solenoid configuration or parallel coils, e.g. in a Helmholtz configuration are employed, Further, a measurement system is provided with several measurement coils to measure the fields generated by the induced eddy currents. The measurement coils are arranged in a volumetric (3D) geometrical arrangement. The individual measurement coils being orientated substantially transverse to the field line of the excitation magnetic field of the excitation coils. A reconstructor receives measurement data from the measurement system and reconstruct an age of an object in the volume of interest from the measurement data. | 01-26-2012 |
20120019239 | DEVICE FOR THE NON-DESTRUCTIVE TESTING OF AN ELECTRICALLY CONDUCTIVE STRUCTURE - A device for non-destructive testing of an electrically conductive part including: an induction portion, a receiving portion, and a processor. The induction portion includes an inductor dissociated into n layers supplied at different frequencies f | 01-26-2012 |
20120025814 | EDDY CURRENT PROBE FOR SURFACE INSPECTION AND EDDY CURRENT INSPECTION DEVICE INCLUDING THE SAME - The present invention discloses an eddy current probe and an eddy current inspection device including the eddy current probe for inspection of surface defect of a rotor wheel including a dovetail coupling part in which a hook is formed. The eddy current probe in accordance with an embodiment of the present invention includes: a main body, a contact part coupled to the main body and having a convex part and a concave part formed thereon corresponding to the hook, and an eddy current sensor being coupled to an end part of the convex part of the contact part. Accordingly, the detectability of a defect and the permeation depth can be enhanced, and the inspection procedures can be simplified. | 02-02-2012 |
20120025815 | REAL-TIME RECTANGULAR-WAVE TRANSMITTING METAL DETECTOR PLATFORM WITH USER SELECTABLE TRANSMISSION AND RECEPTION PROPERTIES - A highly flexible real-time metal detector platform which has a detection capability for different targets and applications, where the operator is able to alter synchronous demodulation multiplication functions to select different types or mixtures of different types to be applied to different synchronous demodulators, and also different waveforms of the said synchronous demodulation multiplication functions; examples of the different types being time-domain, square-wave, sine-wave or receive signal weighted synchronous demodulation multiplication functions. The operator can alter the fundamental frequency of the repeating switched rectangular-wave voltage sequence, and an operator may alter the waveform of the repeating switched rectangular-wave voltage sequence and corresponding synchronous demodulation multiplication functions. | 02-02-2012 |
20120032672 | CARBURIZATION SENSING METHOD - A carburization sensing method according to the present invention includes: a first procedure of attaching a magnetic material to a reference material which has equivalent electromagnetic properties to those of a test material and is not carburized, a second procedure of measuring magnetic strength of each magnetic material and to acquire an electromagnetic test output value for each magnetic material, a third procedure of calculating a correlation between the measured magnetic strength value and the electromagnetic test output value, a fourth procedure of measuring magnetic strengths on a plurality of carburized materials, a fifth procedure of calculating a correlation between a carburized depth and the measured magnetic strength value, a sixth procedure of determining a threshold value Th | 02-09-2012 |
20120038352 | Sensor Package and Method of Manufacturing Thereof - A sensor package and a method for manufacturing a sensor package are disclosed. An embodiment comprises a sensor and a conductive line, wherein the sensor is arranged proximate to the conductive line. The sensor and the conductive line are isolated and at least partially encapsulated. A soft magnet is arranged in, on and/or around the encapsulation, wherein the soft magnet comprises a composition of an insulating material and a material having soft magnetic properties. | 02-16-2012 |
20120038353 | DEVICE AND METHOD FOR MEASURING SURFACE TEMPERATURE OF CAST PIECE - A cast piece surface temperature measuring device includes: a magnetic field exciting device which applies an AC magnetic field substantially perpendicular to a surface of a cast piece; a magnetic field detecting device which detects the AC magnetic field to detect a magnetic flux varied in response to a surface temperature of the cast piece; and a surface temperature deriving device which derives the surface temperature of the cast piece based on an induced electromotive force obtained by detecting the AC magnetic field by the magnetic field detecting device and a predetermined relation data. The magnetic field exciting device includes a solenoidal excitation coil, the magnetic field detecting device includes a solenoidal detection coil interposed between the surface of the cast piece and the excitation coil, and the relation data indicates a correspondence relationship between the surface temperature of the cast piece and the induced electromotive force in a temperature range including a predetermined Curie point. | 02-16-2012 |
20120043962 | METHOD AND APPARATUS FOR EDDY CURRENT INSPECTION OF CASE-HARDENDED METAL COMPONENTS - A method for determining a case depth of a hardened layer in a surface of a metal object includes: (a) placing an eddy current probe at a location adjacent the surface; (b) using the eddy current probe, generating a time-varying eddy current in the object; (c) using the eddy current probe, outputting a measured eddy current and providing a signal representative of the measured eddy current to a computer; (d) using the computer, comparing the time-varying measured eddy current to a correlation of measured eddy currents to known case depths; and (e) determining the case depth at the location of the probe based on the correlation. | 02-23-2012 |
20120112738 | Sensors for Integrated Monitoring and Mitigation of Scour - Systems and methods for detecting scour. Some embodiments provide systems which include a sensor and a signal generator with a combined density equal to or greater than that of water. Optionally, the sensor can be a magnet, magnetic resonator, or accelerometer. In some embodiments, the sensor is adapted to be placed in regions potentially subject to scour and to sense a scour-related condition. The signal generator generates a wireless signal conveying data regarding the as-sensed scour-related. In some embodiments the sensor is the signal generator while a receiver of the wireless signal can include an antenna, a magnetometer, or an ultrasonic sensor. In some embodiments, the housing is conic and the magnetic object is offset from the center of gravity of the coupled sensor, signal generator and housing. | 05-10-2012 |
20120126802 | FREQUENCY SELECTION METHOD AND HARDENING DEPTH MEASUREMENT METHOD OF EDDY CURRENT MEASUREMENT - Disclosed is a method of appropriately and easily selecting a combination of two different frequencies of an AC exciting signal used for eddy current measurement while decreasing or removing the dependence of the measurement accuracy on temperature. Three or more AC exciting signals of different frequencies are applied to an object under measurement by an exciting coil, and an induced current is produced. Detection signals corresponding to the frequencies are detected by a detection coil, and the phase difference between each detection signal and the AC exciting signal corresponding to each frequency is calculated from the detection signals corresponding to the frequencies. From the phase differences, a combination of two frequencies the phase differences of which are within a predetermined range is extracted. The lower frequency of the extracted combination is used for a first frequency, and the higher one is used as a second frequency. Thus, the combination of two frequencies are selected. | 05-24-2012 |
20120126803 | METHOD AND APPARATUS FOR NON-DESTRUCTIVE EVALUATION OF MATERIALS - Methods and apparatus for characterizing composite materials for manufacturing quality assurance (QA), periodic inspection during the useful life, or for forensic analysis/material testing. System are provided that relate eddy-current sensor responses to the fiber layup of a composite structure, the presence of impact damage on a composite structure with or without a metal liner, volumetric stress within the composite, fiber tow density, and other NDE inspection requirements. Also provided are systems that determine electromagnetic material properties and material dimensions of composite materials from capacitive sensor inspection measurements. These properties are related to the presence of buried defects in non-conductive composite materials, moisture ingress, aging of the material due to service or environmental/thermal exposure, or changes in manufacturing quality. | 05-24-2012 |
20120153942 | Stray-Field Sensor Circuit and Method - A sensor circuit is configured and operated in the presence of interference. In connection with various example embodiments, a stray magnetic field is sensed with current sensors that also respectively sense current-induced magnetic fields generated by current flowing in opposing directions through different portions of a conductor. The current-induced magnetic fields and the stray magnetic field are coplanar, and the current sensors are arranged such that a portion of the output from each current sensor corresponding to the stray magnetic field is canceled when the sensor outputs are combined. | 06-21-2012 |
20120153943 | METHOD AND APPARATUS FOR MEASURING AN OBJECT OF INTEREST - This invention relates to a method of and apparatus for, measuring an object of interest. The apparatus ( | 06-21-2012 |
20120153944 | METHOD FOR INSPECTING AN AUSTENITIC STAINLESS STEEL WELD - An object of the present invention is to provide a method for inspecting the presence or absence of a foreign metallic material mixed into an austenitic stainless steel material weld with more satisfactory accuracy. | 06-21-2012 |
20120161758 | EDDY CURRENT TESTING METHOD AND EDDY CURRENT TESTING APPARATUS - In an eddy current testing method which involves using a rotatable eddy current testing probe in which a detection coil is arranged within an exciting coil, a change in detection sensitivity (a deviation of detection sensitivity) which changes depending on the rotational position of the detection coil is reduced. The eddy current testing probe includes an exciting coil EC | 06-28-2012 |
20120206132 | SHIELDED EDDY CURRENT COILS AND METHODS FOR FORMING SAME ON PRINTED CIRCUIT BOARDS - A shielded eddy current coil probe is formed on a printed circuit board and comprises a first coil component forming a test coil and a second coil component forming an active shielding coil. The test coil and the active shielding coil are concentrically arranged and the number of coil windings in the active shielding coil and the field direction thereof are configured to limit the induced field or the sensed field in the test object to the footprint area of the test coil on the test object. Multiple sets of test coils with active shielding coils can be provided on the same or different layers of the printed circuit board to realize different driver, receiver and combined driver/receiver coil configurations. | 08-16-2012 |
20120206133 | Resonant Electromagnetic Sensor - The present device relates to a sensor capable of detecting changes in the electromagnetic field it generates when in proximity to either conductive or nonconductive materials. This occurs by way of oscillating a transmit coil with an electro motive force at a resonant frequency thus creating an electromagnetic field. The magnetic field passes through a target of either conductive or nonconductive material and is then intercepted by a receive coil which likewise oscillates at a resonant frequency, which when in proximity to the transmit coil and transmit coils resonant frequency produces an enhanced signal by way of the interaction of the respective resonant frequencies and receive coil output. | 08-16-2012 |
20120256620 | Systems and Methods of Detecting a Change in Object Presence in a Magnetic Field - The systems and methods of detecting a change in object presence in a magnetic field disclosed herein inject a low amplitude signal near the resonant frequency into the coil until the system comes to equilibrium. At this point the feedback is measured. The feedback signal can be measured as at least one of several signals, for example, but not limited to the voltage on the resonant capacitor, the current in the coil, and the voltage between the resonant capacitor and the coil. A change in the steady state response indicates a change in device presence. | 10-11-2012 |
20120274318 | METHODS AND APPARATUS TO DETERMINE PARAMETERS IN METAL-CONTAINING FILMS - A method and apparatus to determine a parameter of a metal-containing film are provided herein. In some embodiments, a method of determining a parameter of a metal-containing film may include generating a first magnetic field by flowing an alternating current through a coil disposed adjacent to and spaced apart from the metal-containing film, wherein the first magnetic field induces a second magnetic field proximate the metal-containing film; heating the metal-containing film from a first temperature to a second temperature; measuring a response of the first magnetic field to the second magnetic field as the metal-containing film is heated from the first temperature to the second temperature; and correlating the response with a rate of temperature change of the metal-containing film as the metal-containing film is heated from the first temperature to the second temperature to determine a parameter of the metal-containing film. | 11-01-2012 |
20120274319 | Eddy Current Probe for Surface and Sub-Surface Inspection - An eddy current probe includes an excitation coil for coupling to a low-frequency alternating current (AC) source. A magnetoresistive sensor is centrally disposed within and at one end of the excitation coil to thereby define a sensing end of the probe. A tubular flux-focusing lens is disposed between the excitation coil and the magnetoresistive sensor. An excitation wire is spaced apart from the magnetoresistive sensor in a plane that is perpendicular to the sensor's axis of sensitivity and such that, when the sensing end of the eddy current probe is positioned adjacent to the surface of a structure, the excitation wire is disposed between the magnetoresistive sensor and the surface of the structure. The excitation wire is coupled to a high-frequency AC source. The excitation coil and flux-focusing lens can be omitted when only surface inspection is required. | 11-01-2012 |
20120274320 | MAGNETIC FORCE SENSOR - There is provided a magnetic force sensor including: an action unit elastically supported by a supporting member; a magnetic-flux generating source including two or more magnets which are disposed so that a polarity of each of the magnetic-pole faces of the magnets is opposite to a polarity of a corresponding one of the magnetic-pole faces of the adjacent magnets in a particular direction; first magnetoelectric transducers that are individually provided at positions, the positions being positions at which the first magnetoelectric transducers oppose the magnetic-pole faces of the magnets in the action unit; and a second magnetoelectric transducer provided between the first magnetoelectric transducers. Vertical-direction components of a force are detected on the basis of outputs of the first magnetoelectric transducers, and a horizontal-direction component of the force is detected on the basis of an output of the second magnetoelectric transducer. | 11-01-2012 |
20120306483 | ELECTROMAGNET INSPECTION APPARATUS AND METHOD - A method and apparatus for the inspection of electrically conductive components is described. The described apparatus comprises a sensor module having a magnetiser unit suitable for generating a variable DC magnetic field within the test component and an eddy current probe. The variable DC magnetic field and eddy current probe are configured to perform a partial saturation eddy current test upon the test component. The eddy current probe further comprises a magnetic field sensor that provides a means for measuring the permeability within the test component. Employing the magnetic field sensor provides apparatus that is more accurate and flexible in its modes of operation since such sensors provide a means for the actual permeability of a material being tested to be measured. The described methods and apparatus find particular application in the inspection of tubular components used in the oil and gas exploration and production industries. | 12-06-2012 |
20130038322 | EDDY CURRENT MEASURING SENSOR - An eddy current measuring sensor including a probe which is configured as a regular triangle and is provided with an excitation unit for applying a given AC excitation signal to a workpiece and a detection unit for detecting a detection signal occurring in an object to be measured responsive to the applied AC excitation signal, wherein the excitation unit is provided with exciting coils which are arranged on each side of the probe, while the detection unit is provided with detection coils which are arranged at each vertex of the probe. | 02-14-2013 |
20130049745 | METAL DETECTION APPARATUS - A metal detection apparatus that uses one or more operating frequencies. The metal detection apparatus comprises, among other things, a transmitter unit that provides transmitter signals to a transmitter coil that is coupled to a receiver coil, which is connected to the input of a receiver unit. The transmitter unit comprises a frequency generator that provides an operating frequency to the input of an amplifier stage, whose output is connected via a transformer to the transmitter coil. The amplifier stage is connected to a first tap and the transmitter coil is connected to a second tap of the same transformer winding of the transformer. A resonant circuit is formed that is tuned to the operating frequency, and can be tuned optimally and independently of other parts of the transmitter unit. | 02-28-2013 |
20130057268 | Method and Apparatus for Measuring Container Bulge - An extensible frame adapted to receive and maintain a rectilinear container applied upon an interior ledge extensible frame. Two or more orthogonally aligned sensor assemblies are provided to measure deflection of panels forming the container when a static or dynamic load is applied upon an uppermost panel. Each sensor assembly outputs a signal corresponding to a deflection of a panel induced by the load applied upon the uppermost panel. Signals output from the sensor assemblies are received and processed by an output processing unit in either a human cognizable or machine readable format. The amount deflection measured by the sensor assemblies corresponds to an amount of bulge of a panel when a defined load is applied. | 03-07-2013 |
20130106409 | EDDY CURRENT ARRAY PROBE | 05-02-2013 |
20130214770 | DEVICE AND METHOD FOR INDUCTIVE MEASUREMENTS - SELF TEST - A method for nondestructive and noncontact detection of faults in a test piece, with a transmitter coil arrangement with at least one transmitter coil, a receiver coil arrangement with at least one receiver coil for detecting a periodic signal which has a carrier oscillation whose amplitude and/or phase is modulated by a fault in the test piece. A signal processing unit producing a useful signal receiver coil signal, and an evaluation unit evaluating the useful signal for detection of a fault in the test piece. A self-test unit automatically or upon an external request undertakes systematic quantitative checking of signal processing functions of the signal processing unit and/or systematic quantitative checking of the transmitter coil arrangement and/or of the receiver coil arrangement and/or upon external request undertakes calibration of the signal processing unit using a calibration standard which replaces the transmitter coil arrangement and/or of the receiver coil arrangement. | 08-22-2013 |
20130234701 | ELECTROMAGNET INSPECTION APPARATUS AND METHOD - A method and apparatus for the inspection of electrically conductive components is described. The described apparatus comprises a sensor module having a magnetiser unit suitable for generating a variable DC magnetic field within the test component and an eddy current probe. The variable DC magnetic field and eddy current probe are configured to perform a partial saturation eddy current test upon the test component. The eddy current probe further comprises a magnetic field sensor that provides a means for measuring the permeability within the test component. Employing the magnetic field sensor provides apparatus that is more accurate and flexible in its modes of operation since such sensors provide a means for the actual permeability of a material being tested to be measured. The described methods and apparatus find particular application in the inspection of tubular components used in the oil and gas exploration and production industries. | 09-12-2013 |
20130249541 | MOVABLE COIL SCANNER SYSTEMS AND METHODS - A system, such as a magnetic immunity testing system, can include a first coil configured to generate a first magnetic field. The first coil can be disposed on a first side of a scanning volume and can have a first feed for supplying electric current to the first coil. A second coil can be similarly configured on an opposite side of a scanning volume, and a second magnetic field from the second coil can be combined with the first magnetic field to form a combined magnetic field. The coils can be provided with transporters that translate coils in at least one dimension. The system can also include a controller that is configured to control the transporters and the feeds to provide the combined magnetic field as a controlled and calibrated magnetic field over the scanning volume. | 09-26-2013 |
20130300405 | QUENCHING DEPTH MEASUREMENT METHOD AND QUENCHING DEPTH MEASUREMENT APPARATUS - A quenching depth measuring method is used for measuring the quenching depth in a workpiece and includes the steps of: magnetizing the workpiece by disposing, in the vicinity of the workpiece, a magnetizer equipped with an exciting coil; detecting, through a detection coil, an induced magnetic field generated by the magnetization; measuring the induced magnetic field as the output voltage of the detection coil; and specifying the thickness of the quenched hardened layer of the workpiece on the basis of known electromagnetic characteristic information of an unquenched material and a fully-quenched material and an output voltage value measured by the detection coil, the unquenched material being made of the same material as the constituent material of the workpiece and being a material on which a quenching process is not performed, the fully-quenched material being a material on which the quenching process is performed. | 11-14-2013 |
20130307532 | METAL DETECTOR FOR LOCATING METAL OBJECTS - The invention relates to a method for locating metal or metal-containing objects and materials, currents in at least two emission coils being regulated in relation to each other such that a reception coil output signal received by at least one reception coil or average values of demodulation phases generated from the reception coil output signal are regulated in relation to each other continuously to be “zero” even when exposed to metal. The amplitude(s) of the required controlled variable(s) is/are detected as a value by demodulation, preferably at least at 0° and at a demodulation which is set off by 90° and is/are equalized, thereby improving the method such as to allow a reliable detection of an object to be detected even if other metal objects are present in the area of detection. | 11-21-2013 |
20130314081 | COIL ARRANGEMENT FOR A MAGNETIC INDUCTION IMPEDANCE MEASUREMENT APPARATUS COMPRISING A PARTLY COMPENSATED MAGNETIC EXCITATION FIELD IN THE DETECTION COIL - A coil arrangement ( | 11-28-2013 |
20130335075 | SEAL SYSTEM AND METHOD FOR SYSTEM PROBE - A system includes a probe assembly having sensing circuitry configured to sense at least one parameter relating to a rotating machine and a cable coupled to the sensing circuitry. The probe assembly also includes a molded probe body that is integrally molded about the cable and the sensing circuitry and a machined groove disposed on the molded probe body. The machined groove includes a machined surface. | 12-19-2013 |
20140002069 | EDDY CURRENT PROBE | 01-02-2014 |
20140015522 | SYSTEMS, METHODS, AND APPARATUS FOR DETECTION OF METAL OBJECTS IN A PREDETERMINED SPACE - This disclosure provides systems, methods and apparatus for detecting foreign objects. In one aspect an apparatus for detecting a presence of an object in a magnetic field is provided. The apparatus includes a power circuit configured to generate the magnetic field and transfer power wirelessly at a level sufficient to power or charge a load via the magnetic field. The apparatus further includes a detection circuit configured to transmit signals and detect, based on a reflection of the transmitted signals, a frequency of vibration of the object caused by the magnetic field. | 01-16-2014 |
20140103917 | SHEET CONDUCTANCE/RESISTANCE MEASUREMENT SYSTEM - An apparatus for testing of electrical or physical properties of a material include a single coil sensor mounted adjacent to a sample of the material. Sheet conductance of a wide variety of materials may be measured using the single coil to determine if the material conforms to generally accepted standards for the use to which the material will be put. In some examples, the material is a semiconductor wafer or flat panel. In other examples, the material is the body tissue of a patient. A non-invasive technique using the apparatus is also disclosed for monitoring the health of patient tissue such as musculature, and/or to determine whether healthy circulation is present, by measuring the conductance of the patient tissue in response to a magnetic field applied by the single coil. The single coil may be hand held, or it may be movable using an automated positioning system under computer control. | 04-17-2014 |
20140139210 | METAL DETECTOR - A metal detector includes a control housing electrically coupled to a search coil. The control housing includes a battery compartment having a first battery support surface located adjacent and a second battery support surface aligned at an angle relative to the first battery support surface to facilitate removal of a battery from the battery compartment. The metal detector also includes a movable door coupled to the control housing. The door is movable from a first, open position to permit access to an audio connector and a second, closed position covering the audio connector. | 05-22-2014 |
20140232382 | APPARATUS FOR DETECTING FERROMAGNETIC OBJECTS AND SCREENING PEOPLE AND EQUIPMENT - Apparatus for detecting a ferromagnetic object located on or in a person being screened comprises a first magnetic sensor which in use measures an ambient magnetic field or gradient within a first volume of space and produces a corresponding measurement signal, a primary power supply which provides power to the magnetic sensor, a signal processing circuit arranged in communication with the magnetic sensors configured to identify temporal variations in the measurement signal and from the identified temporal variations provide an output signal indicative of the presence of a ferromagnetic object within the volume of space, and a warning device operable by the output from the signal processing circuit to provide within the vicinity the apparatus at least one of an audible and a visible warning in response to the output signal from the signal processing circuit. The apparatus include a user operable input means which enables the warning device to be disabled by a user without powering down the magnetic sensors. | 08-21-2014 |
20140327433 | BONDLINE EMBEDDED CURRENT SENSOR - A system for monitoring electrical current passing through a cured bondline may include a current sensor network embedded in an adhesive layer of the cured bondline. The current sensor network may include a plurality of inductive coils and a plurality of current sensor nodes electrically interconnecting the inductive coils to form a plurality of current sensor loops generating induced current in response to a magnetic field associated with an electrical current passing through the adhesive layer. The current sensor nodes may generate current signals representative of the induced current. The current sensor network may include a digital data communications network located external to the cured bondline and receiving the current signals from the current sensor nodes and detecting and monitoring electrical current passing through the cured bondline based on the current signals. | 11-06-2014 |
20150022193 | Methods and Apparatus for Magnetic Sensor Having an Integrated Coil or Magnet to Detect a Non-Ferromagnetic Target - Methods and apparatus for detecting a magnetic field include a magnetic source configured to provide a magnetic field to induce an eddy current in a non-ferromagnetic target, and a magnetic field sensing element configured to detect the magnetic field as a result of the eddy current. The magnetic field provided by the magnetic source can be a static (i.e. DC) field or a changing (i.e. non-DC) field. | 01-22-2015 |
20150035522 | Device For Direct Microwave Measurement of Permeability as a Function of High DC Voltage - A sample holder and a coaxial method of measuring the permeability of magnetoelectric materials as a function of applied DC voltage are described. The sample holder reduces electromagnetic radiation losses as compared to conventional devices. The connections in the sample holder are electrically isolated from measuring equipment, preventing damage. A complementary algorithm to analyze the signal from the sample and calculate the permeability of the sample is described. | 02-05-2015 |
20150091556 | METHOD AND APPARATUS FOR ANALYZING MATERIALS BY USING PATTERN ANALYSIS OF HARMONIC PEAKS - The present invention provides an apparatus and a method for analyzing materials by using pattern analysis of harmonic peaks. The apparatus for analyzing materials according to the present invention comprises a generating unit generating two or more electromagnetic fields, a detecting unit detecting a magnetization signal generated from a measurement target material as an electromagnetic field is applied to the measurement target material, and an analyzing unit analyzing type of the measurement target material based on a harmonic pattern obtained from the magnetization signal. | 04-02-2015 |
20150300987 | REMOVAL OF BACKGROUND IN MPI - The present invention relates to an apparatus ( | 10-22-2015 |
20150323695 | TRANSMITTING AND RECEIVING ANTENNA FOR A SEARCH ANTENNA POLARIZATION INSTRUMENT - A transmitting and receiving antenna for a search antenna polarization instrument, including pivotably mounted about a support pin a resonance body serving as an antenna and an insulating plate beneath the resonance body serving as an electrode or second antenna, the insulating plate including a metal layer on the side that faces away from the resonance body, and including a magnet plate arranged non-rotatably at a distance from the insulating plate, the magnet plate including a shield on the side facing away from the insulating plate. One end of the resonance body is held between the magnet plate and an additional antenna magnet arranged near the resonance body, and the other end of the resonance body is braced by a holding magnet and held under tension relative to the normal position. Through a corresponding sawtooth control system, this antenna behaves in the manner of a singing saw having improved sensitivity. | 11-12-2015 |
20150362564 | MAGNETIC SENSING APPARATUS AND MAGNETIC SENSING METHOD THEREOF - A magnetic sensing apparatus includes a third direction magnetic sensing component that includes a substrate and a pair of coupled magnetic sensing modules. A groove is set in surface of the substrate. The magnetic sensing module includes a magnetic conductive unit, where a main part of the magnetic conductive unit is set in the groove, and a part of it is exposed out the groove and to surface of the substrate, in order to collect magnetic field signal in the third direction and output the magnetic field signal. The magnetic conductive unit includes a magnetic material layer. The magnetic sensing module includes an inducing configured to receive the magnetic field signal in the third direction and measure corresponding magnetic field strength in the third direction by the magnetic field signal. The inducing unit includes a magnetic material layer. | 12-17-2015 |
20150369880 | INDUCTIVE SENSING BASED ON B-H CURVE NONLINIARITY - An inductive sensing system is based on nonlinearity of the B-H curve for an inductive sensor with an inductor coil wound onto a magnetic core. A DC magnetic field source magnetically couples into the magnetic core a pre-defined DC magnetic-core field, such that the inductive sensor is configured for a magnetic-core operating point on the B-H curve where the value of the second derivative d | 12-24-2015 |
20160003775 | Apparatus and Circuit - Apparatus for an alternating current field measurement (ACFM) probe is disclosed. The apparatus comprises an arrangement for generating a magnetic field for inducing an alternating current field in a conductor; a sensor element arranged to produce a signal responsive to the alternating current field; and a compensator element arranged to compensate for an influence of the generated magnetic field in the signal responsive to the alternating current field. | 01-07-2016 |
20160011280 | MAGNETIC SENSING APPARATUS, MAGNETIC INDUCTION METHOD AND PREPARATION PROCESS THEREOF | 01-14-2016 |
20160041236 | MAGNETISM MEASUREMENT DEVICE - Magnetic-field measuring device having: elongate magnetic-material formed of solid or liquid having magnetic-anisotropy, or composite of solid and liquid; an electrically conductive-body adjacent to magnetic-material, giving magnetic-material a current-induced magnetic-field-vector having a component perpendicular to longitudinal-directions of magnetic-material; coil detecting magnetic-field by magnetic-material, which is magnetized in a direction perpendicular to its longitudinal-direction when no external magnetic-field is applied to magnetic-material or when only a magnetic-field not having a component in longitudinal-direction applied to magnetic-material, and magnetizing in direction having the component in longitudinal-direction when external magnetic-field have the component in longitudinal-direction of magnetic-material applied to magnetic-material, a direction of magnetization of magnetic-material aligned with direction perpendicular to longitudinal-direction of magnetic-material when magnetic-material sufficiently receives current-induced magnetic-field-vector, magnetic-field measuring device intermittently applies current to the conductive-body, detecting an electromotive-force generated by the coil while current is applied to the conductive-body and no current is applied to the conductive-body. | 02-11-2016 |
20160047768 | MAGNETIC COUPLING FOR ELECTRICAL CONDUCTIVITY ASSESSMENT - A method is provided that includes setting up a composite material structure under test (SUT) between a transmit coil and a receive coil. The transmit coil is driven with a RF signal over a plurality of frequencies, thereby causing the transmit coil to produce a magnetic field that by magnetic coupling through the SUT induces a voltage in the receive coil. The voltage in the receive coil is measured, and from the voltage, a measurement of attenuation of the RF signal caused by the SUT between the transmit coil and receive coil is produced. And an effective conductivity of the SUT is calculated from the measurement of attenuation. | 02-18-2016 |
20160178710 | METHOD AND APPARATUS FOR ANALYZING A SAMPLE VOLUME COMPRISING MAGNETIC PARTICLES | 06-23-2016 |
20160249825 | APPARATUS AND METHOD FOR CONCENTRATING MAGNETIC FIELD AT HIGH RESOLUTION AND MAGNETIC FIELD RECEIVING DEVICE FOR SAME | 09-01-2016 |
20160374587 | Single Coil Magnetic Induction Tomographic Imaging - Systems, methods, and apparatus for magnetic induction tomography imaging of specimens, such as human tissue specimens, using a single coil are provided. A plurality of coil property measurements can be obtained using the single coil at a plurality of discrete locations relative to the specimen. The single coil can be designed to be relatively easy to be placed in many different positions/orientations relative to the specimen. A three-dimensional electromagnetic property map, such as a three-dimensional conductivity map or a three-dimensional permittivity map, can be generated from the plurality of coil property measurements obtained using the single coil by accessing a model correlating coil property measurements obtained by the single coil with an electromagnetic property distribution of the specimen. | 12-29-2016 |