| 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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| 11/07/2013 | WO2013166005A1 Power system data acquisition systems |
| 11/07/2013 | US20130293217 Systems, methods, and apparatus for detecting shifts in redundant sensor signals |
| 11/06/2013 | CN203278387U Automatic change-over switch with phase and frequency detection device |
| 11/06/2013 | CN203275520U Pilot frequency signal phase coincidence detection system based on coincidence pulse counting |
| 11/06/2013 | CN103383414A Computing method applied to voltage included angle of power distribution terminal |
| 11/06/2013 | CN102334038B Phase determining device and frequency determining device |
| 11/06/2013 | CN102185607B Phase difference detection method, device and circuit in phase-locked loop circuit |
| 11/05/2013 | US8577634 Systems and methods for synchronizing sensor data |
| 11/05/2013 | US8575915 Power control system and method |
| 10/30/2013 | CN103376357A Method and device for estimating clock pulse phase difference |
| 10/29/2013 | US8572421 Adjusting device performance based on processing profiles |
| 10/29/2013 | US8570071 Phase adjustment apparatus and clock generator thereof and method for phase adjustment |
| 10/24/2013 | WO2013156060A1 Linear 360° range phase detector |
| 10/23/2013 | EP2654379A1 Highly stable dimming device |
| 10/23/2013 | CN103364640A Full-automation balancing device for high-voltage capacitance bridge and balancing method |
| 10/23/2013 | CN103364636A Micro-machinery cantilever capacitance type power sensor-based phase detector and manufacturing method of phase detector |
| 10/22/2013 | US8566052 Probe shape detection apparatus and probe shape detection method |
| 10/16/2013 | CN203241474U Coding-decoding phase check device for electric power circuit |
| 10/16/2013 | CN102426321B Test method for simulating electrification of current transformer primary device during power transmission debugging |
| 10/15/2013 | US8558549 Detector circuit and semiconductor device using same |
| 10/09/2013 | CN103344833A Phase detector based on micromachine indirect thermoelectric type power sensor and manufacturing method |
| 10/09/2013 | CN103344832A Phase checking device of transformers and phase checking method |
| 10/09/2013 | CN103344831A Phase detector based on micromechanical direct thermoelectric power sensors and preparation method thereof |
| 10/09/2013 | CN103344830A New closing phase angle detection method |
| 10/09/2013 | CN102243286B Apparatus for detecting and displaying grounding state of equipment or socket |
| 10/08/2013 | US8552694 Generator device with overvoltage monitoring |
| 10/02/2013 | CN203224604U Portable generator power-angle measuring device |
| 10/02/2013 | CN203224603U Portable generator power-angle measuring device capable of voice alarming |
| 10/02/2013 | CN203224568U High-precision signal phase difference detection device |
| 10/02/2013 | CN103336208A Self-adaptive 100 Hz protecting criterion method for AC/DC power transmission system |
| 10/02/2013 | CN103336176A Intelligent substation phase approval device capable of adaptively receiving FT3 transport protocols |
| 10/02/2013 | CN103336175A Phase detector based on micro-machinery clamped beam capacitance type power sensor and manufacture method thereof |
| 10/02/2013 | CN103336161A A multiterminal oscillation voltage measuring method based on fiber optical communication |
| 10/01/2013 | US8547083 Apparatus for determination of the axial position of the armature of a linear motor |
| 09/25/2013 | CN103318225A Protective box for railway phase-sensitive track circuit |
| 09/25/2013 | CN102305893B Method and device for checking power-factor angle of high voltage line of intelligent substation on site |
| 09/18/2013 | CN203204074U Phase testing circuit of three-phase high-power UPS inverter transformer |
| 09/18/2013 | CN203204073U Digital phase-difference measuring instrument |
| 09/18/2013 | CN103308767A Low-frequency antenna array phase measuring method and device based on GPS (global positioning system) and phase detecting chips |
| 09/17/2013 | US8539426 Method and system for extracting compact models for circuit simulation |
| 09/11/2013 | CN203191742U High-precision phase-selection controlling device |
| 09/11/2013 | CN203191442U A voltage intelligent match measuring apparatus |
| 09/11/2013 | CN102305891B On-line monitoring method of low-frequency oscillation of power system |
| 09/10/2013 | US8533121 Method and apparatus for phase identification in a three-phase power distribution network |
| 09/04/2013 | CN103278687A Power distribution network phase recognition device based on gprs (general packet radio service) |
| 09/04/2013 | CN102445660B Gray Verhulst model-based prediction method of power angle of generator |
| 09/03/2013 | US8525528 Method and device for evaluating electric performances of an FDSOI transistor |
| 09/03/2013 | US8525521 Detector circuit and semiconductor device using same |
| 09/03/2013 | US8525510 Railway positioning system |
| 08/29/2013 | US20130226490 Motion Sensor, Method, and Computer-Readable Storage Medium Providing a Motion Sensor with a State Processor Having a Reduced Amount of State Chatter |
| 08/28/2013 | CN203164267U Large-scale grounding grid metal framework shunt vector measuring system based on wireless transmission |
| 08/28/2013 | CN103267904A Phase checking method in process of cable installation |
| 08/28/2013 | CN103267897A Three-phase-locked loop based on reversed Park conversion |
| 08/28/2013 | CN103267896A Method for measuring initial phase angle of periodic signal |
| 08/28/2013 | CN102364877B Field programmable gate array (FPGA)-based hardware phase discrimination circuit |
| 08/28/2013 | CN101655521B Pulse phase difference detecting circuit and A/D converter using the same |
| 08/27/2013 | US8519719 System for complex impedance measurement |
| 08/22/2013 | US20130214761 3d-ic differential sensing and charge sharing scheme |
| 08/21/2013 | CN203149033U Rotary transformer zero testing instrument |
| 08/21/2013 | CN103257273A Method for measuring common-frequency periodic signal phase differences |
| 08/21/2013 | CN103257272A Power failure detection circuit and detection method for alternating current (AC) power supply |
| 08/21/2013 | CN102305889B Dual mode 220v user side power grid phasor measuring and transmitting device and method |
| 08/14/2013 | CN103248532A Jitter measuring trigger generator, jitter measuring apparatus using the same, method of generating jitter measuring trigger, and method of measuring jitter |
| 08/14/2013 | CN103248116A Automatic change-over switch with two-circuit feeding system phase difference detecting device |
| 08/14/2013 | CN103245839A Method for measuring performance of electrical power insulation equipment and method for measuring inherent phase shifting of current sensor |
| 08/08/2013 | WO2013113891A1 Determining a phase and a frequency of an electric quantity of an operating electrical device |
| 08/07/2013 | EP2623997A1 Determining a phase and a frequency of an electric quantity of an operating electrical device |
| 08/07/2013 | CN203117289U Intelligent nuclear phase device used for P-type power distribution station |
| 08/07/2013 | CN103235184A Grid voltage vector angle detection algorithm of double-fed wind power generation current transformer |
| 08/07/2013 | CN103235183A Measurement and calculation method for three-phase transformer phases |
| 08/07/2013 | CN103235182A Method for measuring generator internal electric potential phase position by adopting rotating speed pulses of hydroelectric generating set |
| 08/07/2013 | CN103235168A Measuring system for shunt vectors of metal frames of large ground grids on basis of wireless transmission |
| 08/07/2013 | CN101893662B Nuclear phase method for digital transformer substation |
| 08/07/2013 | CN101701987B Method for analyzing and recognizing phase of cable and device thereof |
| 08/06/2013 | US8502609 Reference-less frequency detector |
| 08/01/2013 | US20130197839 Three phase power quality measurement using asynchronous, isolated single phase circuits |
| 07/31/2013 | CN103226169A Square wave detector for wireless wake-up circuit |
| 07/31/2013 | CN102082423B Relay protection method for phase to phase fault of circuit |
| 07/24/2013 | CN203084081U Signal quadrature detection apparatus |
| 07/24/2013 | CN103219731A Three-phase phase-locked loop method appropriate for photovoltaic grid connected low voltage ride through |
| 07/24/2013 | CN103217578A Digital phase meter and method for measuring phase difference between signals and based on phase-locked loop technology |
| 07/24/2013 | CN103217577A Digital phase meter and method for measuring high-frequency signal phase change |
| 07/24/2013 | CN103217576A Realizing method and realizing device of six-port phase detector |
| 07/24/2013 | CN102385003B Method for detecting frequency and phase of voltage signals or current signals in electric power system |
| 07/24/2013 | CN102305886B Fundamental voltage synchronous signal detection method during harmonic distortion and unbalance of network voltage |
| 07/23/2013 | US8494794 Methods and systems for determining vascular bodily lumen information and guiding medical devices |
| 07/18/2013 | WO2013106763A1 Three phase power quality measurement using asynchronous, isolated single phase circuits |
| 07/16/2013 | US8489902 Semiconductor integrated circuit |
| 07/16/2013 | US8487659 Comparator with adaptive timing |
| 07/10/2013 | CN203054088U Voltage phase measuring device of high-voltage frequency converter |
| 07/10/2013 | CN103197145A Method and system of ultrahigh resolution phase difference measurement |
| 07/10/2013 | CN103197144A Three-phase power phase sequence detection method for invertion device |
| 07/09/2013 | US8483579 Phase detector circuit for clock and data recovery circuit and optical communication device having the same |
| 07/09/2013 | US8482275 Physical quantity detection circuit for allowing precise adjustment of the phase relationship between a sensor signal and a detection signal |
| 07/04/2013 | US20130169265 Voltage amplitude detection circuit, information storage device, communication device, and voltage amplitude detection method |
| 07/04/2013 | DE10163408B4 Anordnungen und Verfahren zur Fehlerortbestimmung auf einer Kraftübertragungsleitung mit einer einzelnen Anzapfungslast Arrangements and methods for fault location on a power transmission line with a single Anzapfungslast |
| 07/03/2013 | CN102004186B High-accuracy sinusoidal signal measuring method for removing frequency spectrum leakage |
| 07/02/2013 | US8476892 Core recognition system and core recognition method |
| 06/26/2013 | CN103176083A Method for diagnosing impact on metallic oxide arrester electrification test from inter-phase interference |
| 06/26/2013 | CN103176078A Power quality monitoring apparatus for railway power system |