Class / Patent application number | Description | Number of patent applications / Date published |
702096000 | Speed | 51 |
20080249732 | System, method and medium calibrating gyrosensors of mobile robots - Provided are a system, method and medium calibrating a gyrosensor of a mobile robot. The system includes a camera to obtain image data of a fixed environment, a rotation angle calculation unit to calculate a plurality of angular velocities of a mobile robot based on an analysis of the image data, a gyrosensor to output a plurality of pieces of raw data according to rotation inertia of the mobile robot and a scale factor calculation unit to calculate a scale factor that indicates the relationship between the pieces of raw data and the angular velocities. | 10-09-2008 |
20080288200 | Newtonian physical activity monitor - An improved apparatus and methods of posture and physical activity monitoring. The apparatus is physically mountable to or associated with an object or person, includes a multi-axis accelerometer, and derives measurements of posture and of acceleration. Methods are disclosed which provide improved estimations of posture, acceleration, energy expenditure, movement characteristics and physical activity, detect the influence of externally-caused motion, and permit automatic calibration of the apparatus in the field. | 11-20-2008 |
20090012735 | DEVICE FOR DETERMINING A ROTATIONAL SPEED ABOUT THE VERTICAL AXIS OF A VEHICLE - The invention relates to a device for determining a rotational speed about the vertical axis of a vehicle, comprising a rotational speed sensor which outputs a signal which is dependent on the rotational speed about the vertical axis, and a signal evaluation means which determines the rotational speed from the signal supplied by the rotational speed sensor. | 01-08-2009 |
20090018791 | CALIBRATION OF THE FUNDAMENTAL AND HARMONIC ONCE-AROUND VELOCITY VARIATIONS OF ENCODED WHEELS - A method of calibrating once-around and harmonic errors of encoded nips is provided. An encoder with an index pulse is used to measure the velocity and rotation of the driven wheel or idler. The geometry of the drive train and wheel and idler is chosen so that their once around and harmonic frequencies are unique such that no other drive errors will generate these frequencies. The method includes running the idler or wheel at substantially constant velocity for N revolutions. Each index triggers the collection of velocity data, which is averaged for N revolutions. This process detects drive train motion errors that are periodic with respect to the timing of the index pulse (i.e., once per revolution of the wheel or idler). Once the velocity errors have been measured, corrections are made. This method may be incorporated in xerographic machines as part of a setup or calibration procedure. | 01-15-2009 |
20090037129 | Method for the Determination of Long-Term Offset Drifts of Acceleration Sensors in Motor Vehicles - A method for determining long-term offset drifts of acceleration sensors in a motor vehicle has the steps:—the longitudinal vehicle speed Vx is determined in the vehicle's center of gravity;—the share of the driving dynamics in the longitudinal reference acceleration formula (I) and in the transversal reference acceleration formula (II) is calculated from the longitudinal vehicle speed Vx and the yaw rate ω | 02-05-2009 |
20090070060 | Apparatus and method for recognizing motion - Provided is an apparatus and method of recognizing a motion that is capable of performing a pointing function and a character input function using motions sensed by an optical sensor and an inertial sensor. The apparatus includes an inertial sensor sensing a first motion by using at least one of acceleration and angular velocity that are generated by an input motion; an optical sensor sensing a second motion by using reflection of light due to the motion; a locus calculating unit calculating the locus of the motion on the basis of the locus of the first motion and the locus of the second motion; and a communication unit transmitting the calculated locus of the motion. | 03-12-2009 |
20090089002 | Method for the Calibration of a Yaw Rate Measurement - The invention relates to a method for the calibration of yaw rate measurement in a motor vehicle, wherein the motor vehicle features at least one device for determining the yaw rate, a camera system which is in the forward-position, and, if applicable, a steering angle sensor. At least one initial calibration is carried out at a standstill and at least one second calibration is carried out when the motor vehicle is moving. | 04-02-2009 |
20090125266 | APPARATUS FOR GENERATING VEHICLE SPEED SIGNAL AND METHOD THEREOF - Disclosed is an apparatus for generating a vehicle speed signal that can minimize the number of arithmetic operations of an electronic control device. The apparatus includes a PG-B (Pulse Generator B) sensor that is mounted to an output shaft of an automatic transmission, and outputs pulses according to the rotation of the transmission output shaft, a counter that counts pulses from the PG-B sensor and of the predetermined number of pulses are counted, outputs a pulse counter (PC), a vehicle speed signal generation unit that generates a vehicle speed signal in synchronization with the pulse counter (PC) from the counter, an error correction unit that corrects an error in the vehicle speed signal having decimal places from the vehicle speed signal generation unit and defines the vehicle speed signal by an integer ratio, and a speedometer that visualizes and displays the error-corrected vehicle speed signal as a current vehicle speed. | 05-14-2009 |
20090248346 | METHOD OF CALIBRATING A SENSOR, IN PARTICULAR A YAW RATE SENSOR - The invention relates to a method of calibrating a sensor, in particular a yaw rate sensor, in which sensor values (Y | 10-01-2009 |
20090312975 | Forward-looking altitude detector - An altitude dead reckoning system using a speedometer and a forward-looking accelerometer for measuring changes in altitude. | 12-17-2009 |
20090326851 | Miniaturized Inertial Measurement Unit and Associated Methods - An inertial measurement unit includes a base having a plurality of physically distinct sectors, upon which are positioned thereon three groups of orthogonally oriented angle rate sensors, each group positioned on a different sector of the base. Three high-G orthogonally oriented accelerometers are also positioned on the base, as well as three low-G orthogonally oriented accelerometers. A processor is positioned on the base having software resident thereon for receiving signals from the three groups of angle rate sensors and the three high-G and three low-G accelerometers. Software is also resident on the processor for calculating from the received signals one or more of the following: a change in attitude, a change in position, a change in angular rate, a change in velocity, and a change in acceleration of the unit over a plurality of finite time increments. Preferably, each gyro is subjected to oversampling, temperature and bias compensation, and bias offset compensation. | 12-31-2009 |
20100042350 | DOPPLER RADAR GUN CERTIFICATION SYSTEM - A radar gun certification system providing for the certification of doppler radar guns and associated tuning forks is described. The certification system incorporates a handheld testing device for use with a mobile computer to certify the devices. The mobile computer interfaces with a server computer which performs the test and stores the test result data. The certification system provides for the certification of radar gun devices in the patrol car by law enforcement agency personnel. | 02-18-2010 |
20100106445 | ANGULAR VELOCITY SENSOR CORRECTING APPARATUS FOR DERIVING VALUE FOR CORRECTING OUTPUT SIGNAL FROM ANGULAR VELOCITY SENSOR, ANGULAR VELOCITY CALCULATING APPARATUS, ANGULAR VELOCITY SENSOR CORRECTING METHOD, AND ANGULAR VELOCITY CALCULATING METHOD - A measuring unit obtains measurement data of an object measured on the basis of a signal from a GPS satellite and angular velocity of an object output from an angular velocity sensor. An offset value computing unit estimates a running condition of the object on the basis of the measurement data and the angular velocity. The offset value computing unit sequentially derives temporary offset values while changing combination of the measurement data and the angular velocity in accordance with the estimated running condition of the object and, after that, executes statistical process on the temporary offset values, thereby deriving an offset value. An angular velocity conversion coefficient computing unit sequentially derives temporary angular velocity conversion coefficients on the basis of the measurement data and the angular velocity and, after that, executes statistical process on the temporary angular velocity conversion coefficients, thereby deriving an angular velocity conversion coefficient. An angular velocity converting unit derives final angular velocity on the basis of the angular velocity conversion coefficient, the offset value, and the angular velocity. | 04-29-2010 |
20100125430 | ANALOG ANGLE SENSOR ACCURACY CORRECTION PROGRAM CORRECTION METHOD RECORDING MEDIUM AND SERVO DRIVER - A sensor accuracy adjustment program for an analog angle sensor used in an AC servomotor control. A step (S | 05-20-2010 |
20100198544 | SENSOR RESPONSE TIME ACCELERATOR - A sensor response time acceleration method including the steps of reading a signal step and an operating on the signal step. The reading a signal step includes reading a signal from a sensor, the signal representative of an environmental attribute as detected by the sensor. The operation on the signal step includes operating on the signal with a function of an inverse model of the sensor and a function representative of a desired sensor model to yield an accelerated output representative of the environmental attribute. | 08-05-2010 |
20100250179 | METHOD AND APPARATUS FOR MEASURING AND ESTIMATING SUBJECT MOTION IN VARIABLE SIGNAL RECEPTION ENVIRONMENTS - A dynamic motion and distance measuring device for estimating and measuring speed and distance covered by a subject engaged in an athletic endeavor and more particularly to measuring and estimating the speed and distance and providing a relative indication of a measured speed and distance to an optimal speed and distance and/or time including finish time of the subject engaged in an athletic event, even where the event is occurring in changing environment or terrain conditions where remote data collection and signal reception is inconsistent and variable. | 09-30-2010 |
20100262396 | METHOD FOR CALIBRATING A WHEEL SPEED DETECTION SYSTEM - A method for calibrating a wheel speed detection system, comprising at least one wheel speed sensor and at least one electronic control unit. The at least one wheel speed sensor output signal is evaluated in the electronic control unit and the evaluation is adapted to a distance information item which is acquired from a traveled reference distance. | 10-14-2010 |
20110029267 | METHOD FOR ESTIMATING THE CRANK ANGLE AT WHICH 50% OF THE FUEL MASS HAS BEEN BURNT IN A CYLINDER OF AN INTERNAL COMBUSTION ENGINE WITH SPONTANEOUS MIXTURE IGNITION - A method for determining the angular speed of a drive shaft of an internal combustion engine at each tooth event of a phonic wheel presenting a number N of teeth includes detecting the angular amplitude for each tooth; detecting the time of each tooth; and determining the raw angular speed of each tooth according to the corresponding angular amplitude and time. For each tooth a compensation value is determined which represents the difference between the actual angular amplitude of the tooth and the theoretic angular amplitude of the tooth; and determining the angular speed of each tooth by correcting the raw angular speed by means of the corresponding compensation value. | 02-03-2011 |
20110071785 | MOTION SMOOTHING IN 3-D POSITION SENSING APPARATUS - A method of estimating and extrapolating the position of an article is provided. The article's position is detected by relatively infrequent ultrasonic ranging, and provides more frequent reports from internal accelerometers, gyroscopes and optional magnetometers. In a first instance, the method includes calculating new position, velocity and orientation vectors by linearly interpolating between the readings of the sensors at two times. In a second instance, the method includes estimating the orientation of the article by calculating the duration of a timeslice, making a rotational increment matrix and taking the product of the initial orientation and the increment matrix for the appropriate number of timeslices. In a third instance, the method includes calculating the acceleration of an article between three ultrasonically determined locations and recalibrating the accelerometers to align the measured acceleration with the calculated acceleration. | 03-24-2011 |
20110119013 | Vehicle Speed Determination System And Method - A method for verifying the speed of a vehicle having at least a front axle and a rear axle, using sensors separated by a distance. The presence of the vehicle is sensed and an image of the vehicle is recorded to enable the vehicle to be identified. The sensors are triggered to emit signals which are received by the system to enable the speed of the vehicle to be determined. The signals are also used to determine a wheel base measurement for the vehicle. The determined wheel base measurement is compared to an actual wheel base measurement of the vehicle being sensed and any discrepancy between them is taken to be indicative of potential errors in the speed of the vehicle determined by the method. In one embodiment, the a database is provided, the database containing data relating to various vehicle types associated with vehicle specifications including a validated wheel base measurement for each vehicle type. | 05-19-2011 |
20110153251 | METHOD FOR COMPENSATING FOR QUADRATURE - A method for compensating for the quadrature of a micromechanical structure, the micromechanical structure having a substrate having a main extension plane, a seismic mass that is attached by spring elements to the substrate, and first and second compensation electrodes anchored to the substrate; in response to application of a first quadrature voltage between the first compensation electrode and the seismic mass, a first compensation force being produced on the seismic mass and, in response to application of a second quadrature voltage between the second compensation electrode and the seismic mass, a second compensation force being produced on the seismic mass and, in addition, the second quadrature voltage being adjusted as a function of the first quadrature voltage. | 06-23-2011 |
20110251816 | METHOD AND APPARATUS FOR THREE DIMENSIONAL CALIBRATION OF AN ON-BOARD DIAGNOSTICS SYSTEM - The present invention relates to a method and apparatus for three dimensional calibration of an on-board diagnostics system. In one embodiment, the present invention is a method for calibrating an on-board diagnostic system for an automobile including the steps of generating a three dimensional surface corresponding to an engine operating under a first condition, generating a three dimensional surface corresponding to the engine operating under a second condition, and generating a three dimensional threshold surface using the three dimensional surface corresponding to the engine operating under the first condition and the three dimensional surface corresponding to the engine operating under the second condition. | 10-13-2011 |
20110288805 | CONTROL DEVICE WITH AN ACCELEROMETER SYSTEM - A control device includes a two-dimensional inertial system configured to measure an acceleration of the control device. A control circuit is coupled to the two-dimensional inertial system where the control circuit is configured to receive acceleration information for the acceleration measured by the two-dimensional inertial system. The control circuit is further configured to integrate the acceleration information to calculate the velocity of the control device and determine if the velocity of the control device becomes zero along one or both of the two dimensions for which the two-dimensional inertial system is configured to measure acceleration. The control circuit is further configured to correct a drift in the velocity if the control circuit determines that the velocity is zero along one or both of the two dimensions. | 11-24-2011 |
20110307204 | VELOCITY MEASURING DEVICE AND METHOD FOR CORRECTING MEASURED VELOCITY - A velocity measuring device and a measured velocity correcting method are provided. The velocity measuring device includes: a GPS unit that receives a satellite signal from a GPS (Global Positioning System) satellite and generates GPS data including position coordinates and a traveling velocity; an acceleration sensor unit that includes an acceleration sensor and generates sensor data including a traveling velocity and a road slope; and a correction unit that compares the GPS data and the sensor data generated at a current time with the GPS data and the sensor data generated at a previous time and sets the traveling velocity included in the sensor data or the GPS data as a measured velocity depending on whether a variation in traveling velocity exists. | 12-15-2011 |
20110307205 | METHOD FOR SELF-CALIBRATING AN ACCELEROMETER MOUNTED ON A WHEEL OF A VEHICLE WHILE SAID VEHICLE IS MOVING - A method for self-calibrating, while a vehicle is moving, an accelerometer mounted on a wheel of the vehicle so that its plane of maximum sensitivity is secant with the axis of rotation of the wheel. The average value and on the other hand the amplitude of the signal representative of the acceleration Acc-read delivered by the accelerometer are calculated first, for an established speed of the vehicle, based on measurements performed by the accelerometer during a time window corresponding to the time needed for the wheel to complete n rotations, with n>1, then the values of the gain C1 and of the offset C2 of the accelerometer are determined by resolving the system of two equations with two unknown values: | 12-15-2011 |
20110313703 | INERTIAL MEASUREMENT DEVICE AND AN AIRCRAFT INCLUDING SUCH A DEVICE - The present invention relates to an inertial measurement device secured to a structure of a vehicle for which it is desired to measure speeds and/or accelerations, the device comprising at least one piece of moving equipment in rotation about a stationary axis of rotation Y relative to the structure, said moving equipment including at least two measurement means having respective sensitivity axes X′ and Z′ that are mutually orthogonal and that lie in a plane perpendicular to the stationary axis of rotation Y, a motor for driving the moving equipment in rotation, means for determining the angular position of the moving equipment, means for responding to the angular position of the moving equipment to determine the projection of the measurements taken in the rotary frame of reference axes X′ and Z′ by the said at least two measurement means onto a vehicle frame of reference X and Z. | 12-22-2011 |
20120016615 | METHOD FOR ADJUSTING A SELF MIXING LASER SENSOR SYSTEM FOR MEASURING THE VELOCITY OF A VEHICLE - The method is based on a determination of the orientation of the sensor to the surface moving with respect to the sensor and then acquiring data where the lateral velocity is small and the forward velocity is large. Then, the orientation of the sensor with respect to the direction of the forward velocity is determined and the velocity data subsequently measured are corrected using the measured orientation of the sensor with respect to the reference surface and the forward velocity direction. | 01-19-2012 |
20120065915 | INFORMATION PROCESSING METHOD, APPARATUS, AND PROGRAM - A method executed by a computer includes applying a correction to an acceleration value of an object at an interval; calculating an initial speed of the object by assigning the corrected acceleration value in a period to a third relational expression that is obtained by transforming a first relational expression and a second relational expression so as to obtain an initial speed from the acceleration in the period and the interval, where the first relational expression is to obtain an object position from acceleration and an initial speed, and the second relational expression represents force applied to the object due to fluctuation of the center of gravity of the object as a motion equation of a spring model; and calculating coordinate values over a horizontal plane that indicates a center of gravity of the object by assigning the corrected acceleration value and the initial speed to the first relational expression. | 03-15-2012 |
20120130667 | CALIBRATION APPARATUS, CALIBRATION METHOD, AND MANUFACTURING METHOD FOR AN ELECTRONIC DEVICE - Provided is a calibration apparatus, including: a holder for fixing an electronic device; a first motor for rotating the holder with a first rotation axis as a center; a second motor for rotating the holder with a second rotation axis perpendicular to the first rotation axis as a center; and a stopper for restricting a rotational position of the holder about the second rotation axis to a range between a reference position and a perpendicular position reached by rotating the holder by 90 degrees from the reference position, in which the first motor rotates the holder to which the electronic device is fixed at a predetermined speed in each of states in which the rotational position of the holder about the second rotation axis falls in the reference position and in which the rotational position of the holder about the second rotation axis falls in the perpendicular position. | 05-24-2012 |
20120203486 | System and Method for Calibrating an Accelerometer - A method and system are provided for obtaining data for calibrating an accelerometer. The method and system operate by using at least one magnetometer reading to detect that a first orientation is being maintained; obtaining a plurality of accelerometer readings at the first orientation; using at least one magnetometer reading to detect that a plurality of additional orientations are being maintained and, for each orientation, obtaining a plurality of accelerometer readings at that orientation; determining calibration parameters comprising, for each axis of the accelerometer, at least one of a gain value and an offset value, using the plurality of accelerometer readings at the first and plurality of additional orientations; and applying the calibration parameters to subsequent accelerometer readings. | 08-09-2012 |
20120330595 | Method and Apparatus for Measuring Speed of a Brush Motor - A system for determining motor speed of a brush DC motor in an apparatus, including circuitry for sensing current in the brush DC motor; a first filter for receiving a substantially DC component of the sensed current and parameters corresponding to the brush DC motor, for calculating a speed estimate thereof; an adaptive bandpass filter having a center frequency corresponding to the speed estimate of the first filter, for receiving the sensed current and substantially isolating a periodic current fluctuation thereof; a block for determining a frequency of the periodic current fluctuation, the periodic current fluctuation frequency being a commutation frequency of the brush DC motor and corresponding to motor speed of the brush DC motor. The motor speed determined from the periodic current fluctuation of the motor current is then used to control the speed of the motor. | 12-27-2012 |
20130197845 | N-USE AUTOMATIC CALIBRATION METHODOLOGY FOR SENSORS IN MOBILE DEVICES - A method, system and computer readable medium for calibrating an accelerometer in a portable device is disclosed. The method, system and computer readable medium comprises receiving data from the accelerometer, and providing accelerometer samples from the data based upon one or more selection rules that adaptively selects data that satisfy certain criteria. The method system and computer readable medium also includes fitting the accelerometer samples to a mathematical mode. The method system and computer readable medium further includes providing a bias of the accelerometer based upon a center of the mathematical model. | 08-01-2013 |
20130211764 | AUTO-CALIBRATION OF ACCELERATION SENSORS - Representative implementations of devices and techniques provide calibration for a sensor. The calibration includes adapting an output signal of the sensor based on acceleration components at the sensor and a rotational frequency of the sensor. | 08-15-2013 |
20130262011 | COMPASS CALIBRATION - A system, method, and computer program product are provided for calibrating a sensor device, such as an accelerometer, gyroscope, and/or magnetometer. The sensor device provides measurements, and a determination if the sensor device is in a steady state is made based at least partly on the measurements. If the sensor device is in a steady state then measurement data is stored in a memory, and the sensor device is calibrated at least partly with the stored data. A set of such steady points is gathered with the sensor device in various spatial orientations, preferably with the steady point orientations spaced appropriately apart to ensure precise calibration throughout the range of possible orientations. Calibration parameters are determined by fitting the set of steady point measurements to an ellipsoid. Active audio and visual guidance may be provided to a user to assist with orienting the sensor device during calibration. | 10-03-2013 |
20130325386 | MOBILE ELECTRONIC EQUIPMENT WITH GYRO SENSOR, GYRO SENSOR CORRECTION METHOD, AND PROGRAM - A mobile electronic equipment includes a gyro sensor that detects an angular velocity, a first housing with the gyro sensor disposed therein, a second housing movably connected to the first housing, an angle formed between the respective housings being changed by movement of the first housing, and a control unit that calculates a change in an angle formed between the first housing and the second housing before and after the movement as a measured angle, based on output data of the gyro sensor. The control unit calculates a correction value for the output data of the gyro sensor based on the measured angle and a reference angle set in advance (see FIG. | 12-05-2013 |
20130346009 | Intelligent Sensor System - A sensor system and method of using the system synergistically to improve the accuracy and usefulness of measured results is described. The system is comprised of electronically linked components that act as markers to trigger events, producers that gather data from sensors and aggregators that combine the data from a plurality of producers using triggers from marker devices to select the data of interest. The system is shown to be applicable to selection of data regions of interest and to analysis of the data to improve accuracy. The analysis of the data of any particular sensor within the system makes use of extrinsic data, being data generated by other sensors and intrinsic data, that is data or data limits that are known to be true from nature, laws of physics or just the particular information the user wants to acquire. The system is demonstrated on the analysis of Doppler radar measurements of a thrown object. | 12-26-2013 |
20140074418 | METHOD AND SYSTEM FOR CALIBRATING AN INERTIAL SENSOR - A calibration system ( | 03-13-2014 |
20140129171 | RATE-OF-TURN BIAS ESTIMATION FOR MARINE NAVIGATION - An example includes a method to estimate a bias affecting an inertial sensor. The method can include monitoring a plurality of rate-of-turn samples, from the inertial sensor, in a sequence over time, wherein each of the plurality of rate-of-turn samples includes substantially the same actual bias value that is included in each of the plurality of other rate-of-turn samples. The method can include estimating the bias as a weighted average of the plurality of rate-of-turn samples. The method can include determining an adjusted rate-of-turn sample by subtracting the bias from an instant rate-of-turn sample of the plurality of rate-of-turn samples. The method can include putting out the adjusted rate-of-turn. | 05-08-2014 |
20140149061 | INERTIA SENSOR AND METHOD FOR REDUCING OPERATION ERROR OF THE SAME - To provide an inertia sensor and a method for reducing an operation error of the inertia sensor, the sensor and the method being configured such that complicated means is not required, and such that, even at the initial use stage in which the temperature characteristic of the sensor is not learned, and even in the case where the sensor is used in an ambient temperature different from the ambient temperature during the previous use of the sensor, an operation error due to an output change caused by a temperature change can be reduced in a relatively simple and highly accurate manner. An inertia sensor | 05-29-2014 |
20140180621 | SWING COMPENSATION IN STEP DETECTION - Step detection accuracy in mobile devices is increased by determining whether swinging is taking place. According to the invention, swinging can be detected using threshold detection, Eigen analysis, hybrid frequency analysis, and/or gyroscope-based analysis, for example. The determination that swinging is (or may be) occurring can impact how the mobile device reports detected steps for step detection. A count of missteps and/or a level of certainty, based on swing detection, can be provided with a step count. | 06-26-2014 |
20140278183 | HEADING CONFIDENCE INTERVAL ESTIMATION - An inertial measurement system is disclosed. The inertial measurement system has an accelerometer processing unit that generates a calibrated accelerometer data. The inertial measurement system further includes a magnetometer processing unit generates a calibrated magnetometer data, and a gyroscope processing unit generates a calibrated gyroscope data. Using the calibrated accelerometer data, the calibrated magnetometer data, and the calibrated gyroscope data, the inertial measurement system generates a heading angle error indicative of the accuracy of the heading angle error. | 09-18-2014 |
20140288867 | RECALIBRATING AN INERTIAL NAVIGATION SYSTEM - A device may include a radio signal receiver, and an inertial navigation system. Additionally, the device may include a processor to determine that the inertial navigation system has been initiated, monitor a radio signal associated with a mobile network received at the radio signal receiver, and determine a channel impulse response (CIR) based on the radio signal. The device may also monitor a Doppler spread of the radio signal based on the CIR in a time domain until a zero Doppler spread is identified. The device may recalibrate the inertial navigation system based on the zero Doppler spread. | 09-25-2014 |
20140336970 | SYSTEM AND METHOD FOR DETERMINING AND CORRECTING FIELD SENSORS ERRORS - A system and method for determining errors and calibrating to correct errors associated with field sensors, including bias, scale, and orthogonality, includes receiving and providing to a processor angular rate data and a first field vector relative to a first reference directional field and a second field vector relative to a second reference field from at least one field sensor. The processor is configured to relate the first field vector and the second field vector to the angular rate data to determine an error of the at least one field sensor. The processor is also configured to identify a compensation for the error of the at lease one field sensor needed to correct the first field vector and the second field vector and repeat the preceding to identify changes in the error over time and compensate for the changes in the error over time. | 11-13-2014 |
20140343885 | System and Method for the Assisted Calibration of Sensors Distributed Across Different Devices - Sensors in one or more remote devices provide sensor output to a device having a controller. The controller analyzes the sensor data to determine the accuracy of the sensors outputting the sensor data. Based on the analysis, the controller calculates a calibration value to utilize in calibrating one or more of the sensors in the remote devices, or in one or more other devices. | 11-20-2014 |
20150057959 | System And Method For Gyroscope Zero-Rate-Offset Drift Reduction Through Demodulation Phase Error Correction - A circuit for processing signals from a gyroscope includes a first that generates an in-phase demodulated signal and a second demodulator that generates a quadrature-phase demodulated signal with reference to in-phase and quadrature-phase modulated signals, respectively, from the gyroscope. The circuit includes a digital processor that receives the demodulated in-phase and quadrature phase signals from the demodulators and generates an output signal corresponding to a rotation of the gyroscope along a predetermined axis with reference to the in-phase demodulated signal and the quadrature-phase demodulated signal to remove a portion of the quadrature-phase signal from the in-phase signal. | 02-26-2015 |
20150127285 | SPEED ESTIMATION METHOD, SPEED ESTIMATION DEVICE, AND PORTABLE APPARATUS - A learning processing unit derives, using learning data in which a characteristic value based on a distribution coordinate of a detected acceleration by an acceleration sensor which configured to be worn on a body of a user is associated with a moving speed of the user, a moving speed relational expression for finding an estimated speed from the characteristic value. A moving speed estimation unit finds an estimated speed from a current characteristic value using the derived moving speed relational expression. | 05-07-2015 |
20150142362 | Determination of Gyroscopic Based Rotation - A gyroscopic rotational monitoring system may be utilized for monitoring one or more properties of rotatable container or vessel, and/or one or more properties of a displaceable material contained in the rotatable vessels. An exemplary aspect relates to the use of a gyroscope and periodicity sensor (e.g., accelerometer) to determine rotational speed of a concrete mixing drum, so that the slump or other property of the concrete can be monitored or adjusted such as by dosing with water, chemical admixtures, or mixture thereof. | 05-21-2015 |
20160011004 | PORTABLE TERMINAL DEVICE, RECORDING MEDIUM, AND CORRECTION METHOD | 01-14-2016 |
20160103150 | METHOD AND APPARATUS FOR MEASURING THE SPEED OF AN ELECTRONIC DEVICE - An electronic device comprising: a sensor; a communication unit; and at least one processor configured to: receive a first speed measurement from the sensor; receive, via the communication unit, speed information transmitted by an external device; calculate at least one correction parameter based on the first speed measurement and the speed information; and adjust a second speed measurement that is received from the sensor based on the correction parameter. | 04-14-2016 |
20160161524 | METHOD AND DEVICE FOR ESTIMATING THE AIRSPEED OF AN AIRCRAFT - A method and device for estimating the airspeed of an aircraft includes a first estimation unit configured to estimate the airspeed of the aircraft according to a first estimation method, a second estimation unit configured to estimate the airspeed of the aircraft according to a second estimation method, a weighting unit configured to weight the two airspeeds estimated by the first and second estimation methods and a computation unit configured to sum the weighted airspeeds so as to obtain an estimated airspeed of the aircraft. | 06-09-2016 |
20170234904 | SPEED SENSOR | 08-17-2017 |