| Patents for G01R 25 - Arrangements for measuring phase angle between a voltage and a current or between voltages or currents (2,594) |
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| 06/26/2013 | CN103176045A Method and system for pilot frequency bi-phase coincidence detection based on coincidence pulse counting |
| 06/26/2013 | CN102043091B Digitized high-precision phase detector |
| 06/25/2013 | US8473232 Measuring apparatus |
| 06/20/2013 | US20130154612 Foreign body detecting |
| 06/20/2013 | DE102012205223A1 Überwachungsgerät für elektrische Energie Monitoring device for electric energy |
| 06/19/2013 | CN103163374A Detection method and detection device for locomotive synchronizing signal phase, power supply system and electric locomotive |
| 06/18/2013 | US8466899 Touch panel |
| 06/12/2013 | CN202994914U Variable-temperature and controllable magnetic field dynamic magnetoelectric effect testing device used in film |
| 06/12/2013 | CN202994903U Hand-held digital display phase checking device |
| 06/12/2013 | CN103149865A High-precision phase-selection control device |
| 06/12/2013 | CN103149483A Lightning arrester on-line monitoring method based on capacitance network |
| 06/12/2013 | CN103149437A Phase checking method for high-voltage line of P-type power distribution station |
| 06/12/2013 | CN102346219B Method for detecting phases of access point voltages of voltage source inverter by using three-phase software phase-locked loop |
| 06/12/2013 | CN102135568B Period detection method and phase difference detection method for alternating current signal |
| 06/12/2013 | CN102072987B Phase estimation method for short-interval sinusoidal signal and experimental device thereof |
| 06/11/2013 | US8464089 Tracing apparatus and tracing system |
| 06/11/2013 | US8463568 Measuring seawater capacitance in three dimensions as well as time |
| 06/05/2013 | CN202975143U Detection circuit of automatic change-over switch electric appliance |
| 06/05/2013 | CN103134985A Engineering implementation method of power synchronous trap |
| 06/05/2013 | CN102419398B Phase noise capability verification comparison apparatus applied to Ku and K wave band ranges |
| 06/05/2013 | CN102147440B Method for diagnosing partial discharge defect severity of paper oil insulating edge surface of transformer |
| 06/04/2013 | US8457904 Seafood physical characteristic estimation system and method |
| 06/04/2013 | US8456154 Low voltage differential signaling test system and method |
| 06/04/2013 | US8456150 Hand-held phase-shift detector for sensor applications |
| 05/28/2013 | US8452558 Test circuit for testing flexible printed circuit |
| 05/28/2013 | US8452557 Apparatus and method for impedance measurement |
| 05/28/2013 | US8452544 Utility and method for the application of signal advance amplification to analog waveform or signal detection, acquisition and processing |
| 05/23/2013 | WO2013071768A1 Phase identification device for three-phase alternating current power supply |
| 05/23/2013 | US20130127442 Electronic circuit component authenticity determination method |
| 05/22/2013 | CN103116076A Zero tester for rotary transformer |
| 05/22/2013 | CN103116075A Intelligent phase-checking device for P-type power distribution station |
| 05/22/2013 | CN103116074A Alternate current network phase change detection and compensation system and method |
| 05/15/2013 | CN202939299U Electronic transformer calibration device based on synchronous pulse output power supply |
| 05/15/2013 | CN202939210U Apparatus used for detecting voltage and phase of low-voltage three-phase transformer |
| 05/15/2013 | CN103105535A Three-phase phase-locked loop method suitable for photovoltaic connected grid low voltage ride-through |
| 05/15/2013 | CN103105534A Phase difference measurement circuit and measurement method based on field programmable gata array (FPGA) identical periodic signals |
| 05/15/2013 | CN102128975B Voltage stabilization online monitoring phasor data measurement device and phasor measurement method |
| 05/10/2013 | WO2013066054A1 System for diagnosing partial discharge of power instrument by using contactless phase measuring sensor |
| 05/09/2013 | US20130116947 Method and System for Detecting Unbalance in Power Grids |
| 05/08/2013 | CN103091545A Sinusoidal signal phasor half-wave computing method irrelevant to frequency |
| 05/08/2013 | CN102298089B Novel phase difference detection circuit and method thereof |
| 05/08/2013 | CN102183692B Phase frequency characteristic measurement method for tunable fiber Fabry-Perot (FFP) filter and application |
| 05/08/2013 | CN101833055B Method and system for testing low pressure increase of converter valve equipment |
| 05/07/2013 | US8436604 Measuring apparatus, parallel measuring apparatus, testing apparatus and electronic device |
| 05/02/2013 | US20130106399 Determining propagation delay |
| 05/01/2013 | CN102135570B Synchronous phasor measuring method and device for intelligent transformer substation |
| 05/01/2013 | CN101881793B Alternating current power failure detection method and warning circuit |
| 04/30/2013 | US8433533 High resolution sensor with scalable sample rate |
| 04/30/2013 | US8432191 Phase-locked loop having high-gain mode phase-frequency detector |
| 04/24/2013 | CN103063919A Phase detecting device based on indirect type micromechanical microwave power sensor |
| 04/24/2013 | CN103063918A Phase detecting device based on clamped beam capacity type micromechanical microwave power sensor |
| 04/24/2013 | CN103063917A High-precision phase and frequence measuring system |
| 04/24/2013 | CN103063128A Dynamic electronic signal phase measurement system for double-frequency laser interferometer |
| 04/24/2013 | CN102338827B Method for analyzing electric network waveform distortions and automatically monitoring electric power harmonic parameters |
| 04/17/2013 | CN202886472U Electric switch assistant device for distributing lines |
| 04/17/2013 | CN202886471U Multi-channel leakage current phase difference detection equipment |
| 04/17/2013 | CN101923114B Resistance phasing method for medium-voltage distribution line looped network |
| 04/10/2013 | CN103036529A Signal processor, filter, control circuit for power converter circuit, interconnection inverter system and pwm converter system |
| 04/10/2013 | CN103033789A Static and dynamic test system of synchronous phasor measurement unit pressure measuring unit (PMU) |
| 04/10/2013 | CN102200549B Phase detection device and method |
| 04/10/2013 | CN101963643B Method for judging out-of-step oscillation of power system |
| 04/09/2013 | US8417473 Method for estimating inter-channel delay and apparatus and encoder thereof |
| 04/09/2013 | US8415983 Digital phase comparator |
| 04/03/2013 | CN202854233U Phase angle indicating device used in calibration of 500 kV voltage transformer |
| 04/03/2013 | CN103018559A Device and method for phase detection based on indirect type micromechanical microwave power sensor |
| 04/03/2013 | CN102323482B Method for measuring phase frequency characteristic by using digital intermediate-frequency spectrum analyzer during network analysis and measurement |
| 04/02/2013 | US8412477 Method and arrangement for digital measuring a capacitive sensor |
| 03/28/2013 | US20130077724 Digital phase detector with zero phase offset |
| 03/27/2013 | CN202840471U Low-voltage neutral line brake protection system based on PMU (power management unit) synchronous phasor measurement |
| 03/27/2013 | CN202837524U Colossal magnetoresistance magnetoresistive sensor based on phase detection |
| 03/27/2013 | CN202837399U Synchronized phasor measurement apparatus |
| 03/27/2013 | CN102200550B Delay orthogonal digital intermediate-frequency phase discrimination method for detecting phase difference accurately |
| 03/21/2013 | US20130069627 System and method for wireless remote display for high voltage line meter |
| 03/20/2013 | CN102158997B Heating device capable of detecting position of material container |
| 03/20/2013 | CN101726664B Method, device and system for measuring signal phase difference |
| 03/13/2013 | CN202794435U Wireless high-precision synchronous phase reference device |
| 03/13/2013 | CN202794356U Ammeter device with three-phase phase position determination function |
| 03/13/2013 | CN202794306U Electric power circuit load measuring and recording apparatus |
| 03/13/2013 | CA2789322A1 A system and method for measuring phase attributes of electrical grid system and equipment using a smart phone |
| 03/07/2013 | US20130057253 Systems and methods for ultrasonic power measurement and control of phacoemulsification systems |
| 03/06/2013 | EP2564213A1 Motion sensor, method, and computer-readable storage medium providing a motion sensor with a state processor having a reduced amount of state chatter |
| 03/06/2013 | CN102954755A Rotation sensor and rotational angle detection apparatus |
| 03/05/2013 | US8390313 Semiconductor integrated circuit device |
| 02/27/2013 | CN202759217U Power protection circuit for high-frequency heating device |
| 02/27/2013 | CN202757999U Frequency and phase position detector for AC power supply |
| 02/27/2013 | CN102944742A Pressure disturbance signal phase measurement method |
| 02/27/2013 | CN102944741A Abnormal power usage monitoring method based on local power reference |
| 02/27/2013 | CN102116815B Safety test system |
| 02/26/2013 | US8386828 Circuit for estimating latency through a FIFO buffer |
| 02/26/2013 | US8386201 Methods for measurement and characterization of interferometric modulators |
| 02/25/2013 | CA2786293A1 Phase identification system and method |
| 02/21/2013 | US20130043907 Method and system for measuring amplitude and phase difference between two sinusoidal signals |
| 02/19/2013 | CA2787916A1 Method and system for measuring amplitude and phase difference between two sinusoidal signals |
| 02/13/2013 | CN202735416U Electrical power system secondary automatic phasing device |
| 02/13/2013 | CN202735415U Contactless high-voltage wireless phase detector |
| 02/13/2013 | CN102928803A Electronic transformer checking device based on synchronization pulse output power supply |
| 02/13/2013 | CN102928667A Architecture for realizing wide-frequency high-precision phase measurement |
| 02/13/2013 | CN102928666A Digital measurement method for phase difference of alternating current |
| 02/12/2013 | US8374813 Sampling apparatus, sampling method and recording medium |
| 02/12/2013 | US8373444 Time-domain voltage comparator for analog-to-digital converter |