| 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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| 05/02/2012 | CN102435848A Comparison device for verifying capacity of phase noise in Ka wave band |
| 05/02/2012 | CN102435844A Sinusoidal signal phasor calculating method being independent of frequency |
| 05/01/2012 | US8169211 Method for verifying the bandwidth and phase of a digital power control system |
| 04/26/2012 | US20120098571 Methods and structure for on-chip clock jitter testing and analysis |
| 04/26/2012 | US20120098520 Method and relative device for sensing amplitude and phase of an electrical signal |
| 04/25/2012 | CN102426321A 模拟送电调试中的电流互感器一次设备带电的试验方法 Analog transmission commissioning of the current transformer primary test methods for equipment charged |
| 04/25/2012 | CN102426294A 时钟相位差测量方法及设备 Clock skew measurement methods and equipment |
| 04/24/2012 | US8165836 Measurement apparatus and computer readable medium storing program for measuring error of a quadrature demodulator or quadrature modulator |
| 04/24/2012 | US8164322 Phase-difference-corresponding-value measurement device, gain imbalance measurement device, method, program, and recording medium |
| 04/19/2012 | DE102008006986B4 Detektionsanordnung, Zählereinheit, Phasenregelschleife, Detektionsverfahren und Verfahren zum Erzeugen eines Oszillatorsignals Detection device, counter unit, phase-locked loop detection method and method for generating an oscillator signal |
| 04/18/2012 | CN202196121U 灵活的广域电网谐波同步监测系统 Flexible harmonic synchronous WAN Monitoring System |
| 04/18/2012 | CN102419398A Phase noise capability verification comparison apparatus applied to Ku and K wave band ranges |
| 04/18/2012 | CN102419397A Phase difference measuring device and method |
| 04/18/2012 | CN102419389A 测试和测量仪器中的时域测量 Test and measurement instruments in the time-domain measurements |
| 04/17/2012 | US8160834 Methods and systems for observing sensor parameters |
| 04/17/2012 | US8159290 Test apparatus, demodulation apparatus, test method, demodulation method and electric device |
| 04/11/2012 | CN202189095U 三相电相序和缺相检测电路 Three-phase power phase sequence and phase loss detection circuit |
| 04/11/2012 | CN101833037B 检测高压变频器功率单元输入电压相位的装置及方法 Detection of high-voltage inverter power unit input device and method for voltage phase |
| 04/10/2012 | US8155902 Contactor status detection in power inverters |
| 04/04/2012 | EP2436121A1 Transmitter phase shift determination and compensation |
| 04/04/2012 | CN202182912U 一种多功能手持相位表 A multifunctional handheld phase meters |
| 04/03/2012 | US8150640 Method for state estimation based on the measured data of the data-acquisition system in power system |
| 03/28/2012 | CN202177665U Gis局放在线监测用工频相位传感器 Gis PD online monitoring labor frequency phase sensor |
| 03/28/2012 | CN101833051B Electrified tester for zinc oxide arrester |
| 03/28/2012 | CN101825677B Fault phase selection method of four loop transmission lines on same tower based on phase-angle difference of circulation flow current |
| 03/28/2012 | CN101576611B Method for monitoring current sensor angular difference online based on kernel independent component analysis |
| 03/22/2012 | WO2012036339A1 Single-phase line voltage calculating method of a smart electricity distribution operating system, and recording medium for same |
| 03/21/2012 | CN202171619U Pda相位伏安测试仪 Pda phase voltammetry tester |
| 03/21/2012 | CN102385003A Method for detecting frequency and phase of voltage signals or current signals in electric power system |
| 03/20/2012 | US8138798 Symmetric phase detector |
| 03/14/2012 | CN102377385A Bypass variable-frequency controller with phase detection |
| 03/08/2012 | US20120056612 Systems and Methods for Phase Compensated Harmonic Sensing in Fly Height Control |
| 03/07/2012 | CN202159086U 双模式220v用户侧电网相量测量及发送装置 Dual-mode user side 220v power phasor measurement and transmission means |
| 02/29/2012 | CN202153239U 差动相量检测装置 Differential phase amount detecting means |
| 02/29/2012 | CN102364877A Field programmable gate array (FPGA)-based hardware phase discrimination circuit |
| 02/29/2012 | CN101750562B Non-PMU measure point dynamic process estimation method based on flow equation sensitiveness analysis |
| 02/28/2012 | US8127138 Method for embedding information in sonar |
| 02/28/2012 | US8126667 Measurement based voltage stability monitoring and control |
| 02/28/2012 | US8125193 Method of testing an electrochemical device |
| 02/21/2012 | US8121806 Neutralizing electromagentic noise for a capacitive input device |
| 02/15/2012 | CN102353840A Electrostatic induction phase synchronizing method for electric power |
| 02/08/2012 | CN202142863U Household power saver |
| 02/08/2012 | CN1979182B 双对数放大器相位-幅度探测器 Double logarithmic amplifier phase - amplitude detector |
| 02/08/2012 | CN102346219A Method for detecting phases of access point voltages of voltage source inverter by using three-phase software phase-locked loop |
| 02/08/2012 | CN102346211A Alternating-current (ac) real current detection apparatus and detection method thereof |
| 02/08/2012 | CN101526562B 一种分布式无线高压设备绝缘带电测试系统及测试方法 A distributed wireless high-voltage equipment insulation live test systems and test methods |
| 02/01/2012 | CN102338827A Method for analyzing electric network waveform distortions and automatically monitoring electric power harmonic parameters |
| 01/31/2012 | US8108163 Power supply noise analysis method, apparatus and program for electronic circuit board |
| 01/25/2012 | CN102334038A Phase determining device and frequency determining device |
| 01/25/2012 | CN101387671B System parameter of linearity multi-port, detection method and device for vector network analyzer |
| 01/25/2012 | CN101258411B Initial phase detection system and method |
| 01/24/2012 | US8101421 Volumetric induction phase shift detection system for determining tissue water content properties |
| 01/18/2012 | CN202119836U Device for primary phase acquisition of GIS |
| 01/18/2012 | CN102323508A Performance online detection device of induction type oxide arrester |
| 01/18/2012 | CN102323482A Method for measuring phase frequency characteristic by using digital intermediate-frequency spectrum analyzer during network analysis and measurement |
| 01/11/2012 | CN102315622A Electric power conversion system and electric power conversion device |
| 01/04/2012 | EP2402772A1 Phase determining device and frequency determining device |
| 01/04/2012 | CN102305893A Method and device for checking power-factor angle of high voltage line of intelligent substation on site |
| 01/04/2012 | CN102305891A On-line monitoring method of low-frequency oscillation of power system |
| 01/04/2012 | CN102305889A Dual mode 220v user side power grid phasor measuring and transmitting device and method |
| 01/04/2012 | CN102305886A Fundamental voltage synchronous signal detection method during harmonic distortion and unbalance of network voltage |
| 01/04/2012 | CN101871965B Method for detecting zero crossing time, frequency and phase difference of power sinusoidal signals |
| 01/04/2012 | CN101701988B Integrated portable multichannel phase coherent signal analyzer |
| 12/28/2011 | CN202093146U 发动机相位关系测量装置 Engine phase relationship measuring device |
| 12/28/2011 | CN202093082U 分体式金属氧化物避雷器同步阻性电流带电测量装置 Split MOA synchronization resistive current measurement device charged |
| 12/28/2011 | CN102301247A 一种交流电压相位识别方法、电源模块及电源系统 An AC voltage phase identification method, power modules and power systems |
| 12/28/2011 | CN102298089A 一种新型相位差检测电路及方法 A novel phase difference detecting circuit and method |
| 12/28/2011 | CN101788607B 低压相序相位仪及其检测方法 Low phase sequence and phase detection instrument |
| 12/27/2011 | US8085033 Phase detector system |
| 12/21/2011 | CN102288821A 三相电路相位差的测量方法、测量装置、测量程序及载体 Three-phase circuit phase measurement method, the measuring device, the measurement procedures and carrier |
| 12/21/2011 | CN102288803A 一种电能质量暂态扰动实时检测方法 One kind of real-time power quality transient disturbance detection method |
| 12/20/2011 | US8082118 Test apparatus |
| 12/20/2011 | US8081013 Digital phase and frequency detector |
| 12/14/2011 | CN202075326U 一种moa便携式监测设备 One kind of portable monitoring equipment moa |
| 12/14/2011 | CN101149404B 特定相位位置检测电路以及特定相位位置检测方法 Certain phase position detection circuit and method for detecting a specific phase position |
| 12/07/2011 | CN202066933U Fault detecting and positioning device for ultrahigh voltage line |
| 12/07/2011 | CN102269780A 一种三相电压快速锁相环的方法 A three-phase voltage fast PLL method |
| 11/30/2011 | CN202057749U 一种检测并显示设备或插座接地状态的仪器 An instrument to detect and display device or receptacle ground state |
| 11/30/2011 | CN102262176A 一种用于测量电力系统馈线终端的通道数据的方法 A method for measuring the power system feeder channel data terminal |
| 11/30/2011 | CN101655533B 一种检测单板之间连接状态的装置和方法 An apparatus and method for detecting a connection state between a veneer |
| 11/24/2011 | US20110288801 Method and system for determining the time-of-flight of a signal |
| 11/24/2011 | US20110285379 Method and apparatus for detecting the phase wiring of any arbitrary unknown phase voltage relative to a reference phase voltage |
| 11/23/2011 | CN102253284A Phase difference synchronous measuring device and method for multi-way sine wave signals |
| 11/22/2011 | US8065102 Pulse width measurement circuit |
| 11/18/2011 | CA2739195A1 Power meter phase identification |
| 11/17/2011 | US20110279147 Apparatus and method for phase synchronization in radio frequency transmitters |
| 11/16/2011 | CN102243286A Apparatus for detecting and displaying grounding state of equipment or socket |
| 11/16/2011 | CN101733540B Method for acquiring values of trigger angle and extinguishing angle in real time in alternating current resistor spot welding |
| 11/16/2011 | CN101603985B Method for measuring sine signal with high accuracy |
| 11/09/2011 | CN202033421U Phase measuring instrument |
| 11/09/2011 | CN102236069A Test system and test method |
| 11/02/2011 | CN202025038U Serial connection type zero load current phase measuring instrument |
| 10/20/2011 | US20110257779 Phase-locked Web Position Signal Using Web Fiducials |
| 10/19/2011 | EP1703292B1 A method for measuring the operating state of a synchronous motor using composite power angle meter |
| 10/19/2011 | CN102221639A Positive and negative sequence current real-time detection method |
| 10/13/2011 | US20110251810 Method and system for powerline length measurement |
| 10/11/2011 | US8036842 Method and system for real-time signal classification |
| 10/06/2011 | US20110241725 Semiconductor integrated circuit device |
| 10/06/2011 | US20110241653 Impedance calibration apparatus of semiconductor integrated circuit |
| 10/05/2011 | CN101865952B Method for realizing high-precision synchronous phasor measurement |