| Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503) |
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| 01/11/2012 | CN101673934B Serial arc-fault circuit interrupter and serial arc-fault protection method thereof |
| 01/11/2012 | CN101523726B Efficient clock calibration in electronic equipment |
| 01/10/2012 | CA2335814C Adaptive sampling rate based on power system frequency |
| 01/05/2012 | WO2012002617A1 Power quality measuring device and method |
| 01/05/2012 | WO2012002615A1 Power quality monitoring system and method thereof |
| 01/05/2012 | WO2012002576A1 Signal detector, communication device provided with signal detector, and communication method |
| 01/05/2012 | WO2012000510A1 Method and system for monitoring structural health of a filter in a wind turbine, and a wind turbine |
| 01/05/2012 | US20120004878 Detector assembly for use in environments containing background magnetic noise and method thereof |
| 01/04/2012 | EP2402772A1 Phase determining device and frequency determining device |
| 01/04/2012 | EP2402767A2 Method and apparatus for generating a gated density bitmap |
| 01/04/2012 | EP1337845B1 Method for analyzing mass spectra |
| 01/04/2012 | CN202102051U Power grid interharmonic measuring instrument |
| 01/04/2012 | CN202102049U Precise metering module based on DSP |
| 01/04/2012 | CN102305892A Novel power grid harmonic detection analysis device |
| 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 | CN101706527B Method for detecting arc faults based on time-frequency characteristics of high-frequency current component |
| 01/04/2012 | CN101701988B Integrated portable multichannel phase coherent signal analyzer |
| 01/04/2012 | CN101126776B Broad band and high resolution ratio millimeter wave and sub millimeter wave signal detecting method |
| 12/29/2011 | US20110320148 Method and apparatus for generating a gated density bitmap |
| 12/28/2011 | CN202093094U 基于建筑设备物联网的分布式谐波在线检测系统 Things based construction equipment distributed harmonic line detection system |
| 12/28/2011 | CN102299557A 配电变压器台区电能谐波监控远方报警装置 Harmonic power distribution transformer station area remote alarm monitoring device |
| 12/28/2011 | CN101479613B 瞬时确定交流电网上的信号畸变率的方法和相关装置 Determine the instantaneous signal distortion AC line method and related devices |
| 12/22/2011 | WO2011115836A3 Configurable electronic device reprogrammable to modify the device frequency response |
| 12/22/2011 | US20110309821 Frequency measuring device and odor sensor and electronic equipment which are provided with the frequency measuring device |
| 12/21/2011 | CN202083746U 一种适合于网络分析的浮置式测量系统 Which is suitable for network analysis of floating measuring system |
| 12/21/2011 | CN202083745U 变频器功能检测装置 Inverter function detection device |
| 12/21/2011 | CN202083742U 数字式超低频宽带频率特性分析仪的激励源及检测转换通道 Ultra-wideband digital frequency characteristics of the low-frequency analyzer to convert the excitation source and detection channel |
| 12/21/2011 | CN102288820A 基于锁相环和神经网络相结合的谐波检测方法 Phase-locked loop and harmonic detection method based on the combination of neural networks |
| 12/21/2011 | CN102288819A 一种基于fpga的电力谐波分析仪 An fpga based power harmonic analyzer |
| 12/21/2011 | CN102288807A 一种测量电网电压闪变的方法 A grid voltage flicker measurement method |
| 12/21/2011 | CN101738551B 基于联网的暂态电能质量扰动智能分析方法 Perturbation analysis method based on intelligent networking of transient power quality |
| 12/21/2011 | CN101241166B 测量装置特性变化的可扫描虚拟轨道方法与环形振荡器电路 Measuring device characteristics change scannable virtual orbital method and ring oscillator circuit |
| 12/20/2011 | US8081003 Circuit arrangement with a test circuit and a reference circuit and corresponding method |
| 12/15/2011 | WO2011155984A1 Techniques for mass spectrometry peak list computation using parallel processing |
| 12/15/2011 | US20110307196 System and method for ground isolation detection in a vehicle |
| 12/15/2011 | US20110304318 Frequency-scalable shockline-based signal-source extensions |
| 12/14/2011 | EP2394570A1 Biological signal processing apparatus, biological signal processing method, and biological signal processing program |
| 12/14/2011 | CN202075348U 智能化多功能物理量测量仪 Intelligent multi-functional physical measurement instrument |
| 12/14/2011 | CN202075347U 一种用于原子频标的环路振荡周期测量设备 An atomic frequency standard loop oscillation period measurement equipment |
| 12/14/2011 | CN202075346U 频率计 Frequency meter |
| 12/14/2011 | CN202075345U 电力周波检测报警装置 Power cycle detection and alarm system |
| 12/14/2011 | CN102279477A 具有自动调整谐振频率功能的电光相位调制器 With automatic adjustment function resonant frequency electro-optical phase modulator |
| 12/14/2011 | CN101706532B 一种谐波阻抗测量方法及测量装置 Harmonic impedance measuring method and apparatus |
| 12/08/2011 | WO2011151907A1 Ac electric charge measurement device, and ac electric charge measurement method |
| 12/08/2011 | WO2011150618A1 Radio terminal and signal scanning method thereof |
| 12/07/2011 | EP2391899A1 Method and system for determining a spectral vector from measured electromagnetic-radiation intensities |
| 12/07/2011 | CN202066925U 电网谐波监测仪 Harmonic monitor |
| 12/07/2011 | CN202066909U 微机频率分析仪 Computer frequency analyzer |
| 12/07/2011 | CN102269803A 基于时间延迟的离散频谱低频成分的校正方法 Time delay correction method of discrete spectrum based on the low-frequency component |
| 12/07/2011 | CN102269787A 电子式电压互感器谐波特性检测方法及其检测装置 Electronic voltage transformer characteristic harmonic detection method and detection device |
| 12/07/2011 | CN102269785A 在线铁磁共振检测的方法和系统 Methods and systems for detection of ferromagnetic resonance line |
| 12/07/2011 | CN102269777A 具有频率响应自适应性的同步信号检测装置及检测方法 Has a frequency response adaptive sync signal detection apparatus and detection method |
| 12/07/2011 | CN101871968B 可靠的时标脉冲测量方法及其测量装置 Reliable pulse measurement method and time scale measuring device |
| 12/07/2011 | CN101852864B 一种利用地表一致性统计频谱分析技术处理海量地震数据的方法 A use of surface-consistent statistical spectral analysis techniques massive seismic data processing method |
| 12/07/2011 | CN101387663B 超低功耗全失压测量装置及测量方法 Total loss of ultra-low power devices and measurement methods for pressure measurement |
| 12/06/2011 | US8073656 High bandwidth oscilloscope for digitizing an analog signal having a bandwidth greater than the bandwidth of digitizing components of the oscilloscope |
| 12/06/2011 | US8072206 Spectrum analyzer system and spectrum analyze method |
| 12/01/2011 | WO2011116218A3 Frequency measuring and control apparatus with integrated parallel synchronized oscillators |
| 11/30/2011 | CN202057731U 电波钟接收天线调校仪 Clock radio receiving antenna tuned instrument |
| 11/30/2011 | CN202057726U 一种绞车电气控制系统中的变频器频率检测装置 One kind of electric winch control system inverter frequency detection device |
| 11/30/2011 | CN102262187A 功率传感器频率特性测试补偿装置及其方法 Power sensor frequency characteristics of the test device and method of compensation |
| 11/30/2011 | CN102262182A 光伏并网逆变器孤岛检测方法 PV grid-connected inverter islanding detection method |
| 11/30/2011 | CN101556299B 检测变压器绕组微小形变的方法 Method for detecting small transformer winding deformation |
| 11/24/2011 | WO2011144809A1 Method and arrangement for adaptive signal detection |
| 11/24/2011 | US20110288801 Method and system for determining the time-of-flight of a signal |
| 11/24/2011 | US20110285518 Method for detecting rumble strips on roadways |
| 11/24/2011 | US20110285381 Phase transient response measurements using automatic frequency estimation |
| 11/24/2011 | US20110285380 Grid monitoring system and related method |
| 11/24/2011 | DE102011075936A1 Verfahren und System zum Bestimmen der Flugzeit eines Signals A method and system for determining the flight time of a signal |
| 11/23/2011 | EP2297588B1 Signal processing device and method for detecting and locating spectral shapes |
| 11/23/2011 | CN202049196U Frequency stability measuring device |
| 11/23/2011 | CN202049193U Multifunctional electricity integration data measuring and acquiring device |
| 11/23/2011 | CN102255330A Device and method for detecting island of micro power grid system |
| 11/23/2011 | CN102253283A Island detection method based on wavelet packet energy spectrum |
| 11/23/2011 | CN102253282A Method for obtaining continuous frequency spectrum interpolation power harmonic parameter of Nuttall window function |
| 11/23/2011 | CN102253281A Method for measuring power grid frequency by resisting harmonic interference and automatically changing phase based on software |
| 11/17/2011 | DE19910902B4 Messwerterfassungs- und -Anzeigenvorrichtung Data acquisition and -Anzeigenvorrichtung |
| 11/17/2011 | DE112009002185T5 Frequenzcharakteristik-Messvorrichtung Frequency characteristic measuring apparatus |
| 11/16/2011 | EP2386869A2 Density trace measurement and triggering in frequency domain bitmaps |
| 11/16/2011 | EP2386867A2 Signal recognition and triggering using computer vision techniques |
| 11/16/2011 | CN102246415A Methods for determining the frequency or period of a signal |
| 11/16/2011 | CN102243272A High-precision harmonic analysis method of sampling data synchronization |
| 11/16/2011 | CN101603985B Method for measuring sine signal with high accuracy |
| 11/09/2011 | CN202033420U Special circuit for time parameter tests of analog integrated circuit test system |
| 11/09/2011 | CN202033419U Touching-type multifunctional frequency meter based on TFT screen display |
| 11/09/2011 | CN202033406U Pqms |
| 11/09/2011 | CN102236069A Test system and test method |
| 11/09/2011 | CN102236048A Method for measuring phasor frequency of electric system |
| 11/09/2011 | CN101806835B Interharmonics measuring meter based on envelope decomposition |
| 11/09/2011 | CN101226670B Shorted fault and alarming method for beyond-retrieve-type cable-type line-type heat fire detector |
| 11/08/2011 | US8055465 Method, data processing program and computer program product for determining a periodic cycle of time series data |
| 11/08/2011 | US8054088 Passive intermodulation test apparatus |
| 11/03/2011 | US20110267031 Method and apparatus for determining a vapor signature based upon frequency |
| 11/02/2011 | EP2382479A1 High frequency analysis of a device under test |
| 11/02/2011 | CN101750540B Method for detecting parasitic loop of transformer station direct current system |
| 11/01/2011 | US8050880 Generation of a constant envelope signal |
| 11/01/2011 | US8049515 Silicon MEMS resonators |