Class / Patent application number | Description | Number of patent applications / Date published |
340658000 | Phase or frequency | 12 |
20090102673 | POLYPHASE SOURCE DETECTING CIRCUIT - A polyphase source detecting circuit configured for detecting a polyphase source having at least two phase sources includes at least two sampling circuit and an alarm circuit. Each sampling circuit has a control switch. A control terminal of the control switch of each sampling circuit is connected to one of the phase sources of the polyphase source respectively. The alarm circuit has a first transistor, a first LED, and a second LED. The anodes of the first and second LEDs are connected to a power supply. The cathode of the first LED is connected to the gate of the first transistor and connected to ground via the control switches of the sampling circuits in turn. The cathode of the second LED is connected to the drain of the first transistor. The source of the first transistor grounded. | 04-23-2009 |
20100141463 | PROVIDING PRICE AND SERVICE INFORMATION TO ELECTRIC POWER CUSTOMERS - A notification device and method associated therewith for notifying an electric power consumer to reduce electric power consumption when the notification device detects selected power system conditions. The notification device detects conditions on the electric power system that would likely be alleviated by a reduction in consumer power consumption and provides a visual and/or audible notification to the consumer accordingly. The condition may be indicative of strains on the electric power system and/or higher cost of electricity distributed to the consumer. The condition may be induced by the electric power utility. The notification device and method disclosed herein allow the consumer to decide whether to reduce power consumption as is practical for the consumer. | 06-10-2010 |
20100188239 | MONITORING ELECTRICAL ASSETS FOR FAULT AND EFFICIENCY CORRECTION - A system and method of monitoring a plurality of electrical assets comprise an electricity distribution infrastructure, including a plurality of electrical asset sensors coupled to the electrical assets for monitoring an operating condition of the electrical assets as well as any fault conditions. The sensors may include a current transformer for obtaining a current waveform, a GPS receiver for applying a synchronized time-stamp to the waveform data, and a mesh network radio for transmitting the time-stamped waveform data. Data from the plurality of sensors may be encrypted and transmitted over a mesh network to one or more gateways that are in communication with a central command processor. In response to an abnormal operating condition of any electrical asset, the central command processor may determine a probable fault location, a probable fault type, and a fault response. | 07-29-2010 |
20100231398 | FREQUENCY DOMAIN BITMAP TRIGGERING USING COLOR, DENSITY AND CORRELATION BASED TRIGGERS - An RF test and measurement device, including a front end for receiving a time-varying signal and a real-time engine for generating digital frequency domain spectrums based on the time-varying signal. The device also includes a memory subsystem containing a frequency domain bitmap which is updated through sequential receipt and storage of the digital frequency domain spectrums. The real time engine is further configured to monitor the frequency domain bitmap for occurrence of a signal characteristic, and in response to detection of the signal characteristic, cause a capture of the time-varying signal into a storage location of the RF test and measurement device. | 09-16-2010 |
20110074593 | ELECTRONIC DEVICE AND THEFT WARNING METHOD THEREOF - A theft warning system includes a first electronic device and a second electronic device. The first electronic device is configured for transmitting monitoring signals, wherein the frequency of the monitoring signals is capable of changing according to change in the voltage supplied to the first electronic device. The second electronic device communicates with the first electronic device by receiving the monitoring signals transmitted by the first electronic device, and generating alarms when a frequency of the received monitoring signals is changed. A theft warning method applied to the electronic device is also provided. | 03-31-2011 |
20110241892 | Frequency Monitoring to Detect Plasma Process Abnormality - Abnormal conditions within an RF-powered plasma process chamber are detected by detecting whether the frequency of a variable-frequency RF power supply moves outside established lower and upper limits. In a first aspect, a first pair of lower and upper limits are established as a function of the frequency of the power supply sampled after a new process step begins or after a sample control signal changes state. In a second aspect, a second pair of lower and upper limits are not adapted to the frequency of the power supply. Both aspects preferably are used together to detect different occurrences of abnormal conditions. | 10-06-2011 |
20120139740 | METHOD FOR MONITORING A STATIC AND/OR DYNAMIC STABILITY OF A WIND TURBINE - The invention relates to a method for monitoring a static and/or dynamic stability of a wind turbine. The wind turbine has a tower, a nacelle, which is supported by the tower, and a rotor, which is mounted in or on the nacelle and has at least one rotor blade which can be adjusted about its longitudinal axis. The method includes the following steps: the wind turbine is excited to oscillate in at least one direction. A frequency (f | 06-07-2012 |
20120319855 | SIGNAL DISPLAY DEVICE, METHOD, AND RECORDING MEDIUM - According to the present invention, a signal display device includes: a first characteristic value measurement unit, a display unit, a second characteristic value measurement unit, and a display form changing unit. The first characteristic value measurement unit measures any one of characteristic values of a signal to be measured, and the display unit displays the characteristic value measured by the first characteristic value measurement unit while the characteristic value is associated with time. The second characteristic value measurement unit measures any one of the characteristic values of the signal to be measured, and the display form changing unit changes a display form on the display unit according to the characteristic value measured by the second characteristic value measurement unit. | 12-20-2012 |
20130187783 | WIND TURBINE CONDITION MONITORING METHOD - A wind turbine condition monitoring method includes the steps of generating in advance a reference curve for normal operation of a transmission chain of a wind turbine using position information, measuring position information and generating an actual condition monitoring curve; comparing the actual condition monitoring curve with the reference curve, and determining the current condition of the wind turbine from the comparison. With the proposed monitoring method, monitoring with a high signal-to-noise ratio can be achieved with minimal or no addition of hardware, such as an ND module; moreover, computational task is greatly reduced, so that the monitoring system can be more easily integrated into the main control system. In addition, the position measurement system is more stable than a vibration measurement system, and the monitoring result is more reliable. | 07-25-2013 |
20140320297 | ALARM SIGNAL GENERATOR CIRCUIT AND ALARM SIGNAL GENERATION METHOD - With regard to an instrument wherein a plurality of phase operations are carried out, the type of failure or the phase in which the failure has occurred is determined and, in accordance with the result of the determination, an alarm signal is generated. Provided that the failure details and the phase in which the failure has occurred can be determined from the generated alarm signal, it is possible, using a configuration wherein an alarm signal having a pulse number corresponding to the phase in which a failure has occurred is generated, or a configuration wherein an alarm signal having a pulse width corresponding to the phase in which a failure has occurred is generated, to determine the type of failure that has occurred and the phase in which the failure has occurred from the pulse number and pulse width. | 10-30-2014 |
20150356854 | APPARATUS AND METHOD FOR MONITORING AND CONTROLLING DETECTION OF STRAY VOLTAGE ANOMALIES - Apparatus and methods for detecting stray voltage anomalies in electric fields are provided herein. In some embodiments, an apparatus for detecting an electrical field may comprise: at least one sensor probe for generating data corresponding to an electrical field detected by the at least one sensor probe, wherein the at least one sensor probe comprises at least one electrode; a processor, coupled to the at least one sensor probe, for analyzing the data to identify a voltage anomaly in the electric field; and an indicator, coupled to the processor, for alerting a user to a presence of the voltage anomaly in the electric field. | 12-10-2015 |
20150356855 | APPARATUS AND METHOD FOR MONITORING AND CONTROLLING DETECTION OF STRAY VOLTAGE ANOMALIES - Apparatus and methods for detecting stray voltage anomalies in electric fields are provided herein. In some embodiments, an apparatus for detecting an electrical field may comprise: at least one sensor probe for generating data corresponding to an electrical field detected by the at least one sensor probe, wherein the at least one sensor probe comprises at least one electrode; a processor, coupled to the at least one sensor probe, for analyzing the data to identify a voltage anomaly in the electric field; and an indicator, coupled to the processor, for alerting a user to a presence of the voltage anomaly in the electric field. | 12-10-2015 |