Patents
Sitemap › G01 - Measuring; Testing › G01R - Measuring electric variables; Measuring magnetic variables › G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
Patents for G01R 23 - Arrangements for measuring frequencies; Arrangements for analysing frequency spectra (7,503)
08/2014
08/14/2014US20140229133 Method for Estimating Frequencies and Phases in Three Phase Power System
08/14/2014US20140225599 Transformer based sensor arrangement
08/14/2014US20140225592 Method and device for detecting isolated operation of power generation installations
08/14/2014US20140225591 Test and measurement instrument including asynchronous time-interleaved digitizer using harmonic mixing
08/14/2014US20140225590 Method and system for implementing remote spectrum analysis
08/14/2014US20140225451 Nonlinear system identification for optimization of wireless power transfer
08/14/2014DE112008001091B4 Strahlungswirkungsgradmessvorrichtung und Strahlungswirkungsgradmessverfahren Radiation efficiency measuring apparatus and radiation efficiency measurement methods
08/13/2014CN203772966U 一种便携式测量仪 A portable measuring instrument
08/13/2014CN203772957U 电网谐波检测仪 Harmonic detector
08/13/2014CN203772956U 一种基于正交调制原理的频率特性测试仪 Based on the principle of quadrature modulation frequency characteristics tester
08/13/2014CN203772955U 一种用于分布式、多通道的频率采集装置 Frequency acquisition device a distributed, multi-channel for the
08/13/2014CN103983854A 石英晶体电参数测试系统 Quartz electrical parameters of the test system
08/13/2014CN103983852A 电能质量谐波分析仪的谐波分析方法 Harmonic Analysis of Power Quality Harmonic Analyzer
08/13/2014CN103983851A 主动配电网谐波源定位分析方法 Active Hotels harmonic source localization analysis
08/13/2014CN103983850A 基于压缩感知的电力系统谐波压缩信号重构与检测方法 Signal Reconstruction and harmonic detection method compressed sensing power system based on
08/13/2014CN103983849A 一种实时高精度的电力谐波分析方法 Harmonic analysis method for real-time precision
08/13/2014CN103983848A 一种基于电容器支路监测点的电容器谐振预警系统及预警方法 Based on the monitoring points capacitor resonant capacitor branches warning system and early warning methods
08/13/2014CN103983847A 一种同步相量测量中基于rls的自适应频率跟踪测量方法 A synchronized phasor measurement tracking measurement method based on adaptive frequency rls
08/13/2014CN103983846A 基于光电振荡器的弱信号探测方法 Optoelectronic oscillator based on a weak signal detection method
08/13/2014CN102798748B 一种基于迭代傅里叶变换计算交流电压信号幅值和相位的方法 An iterative method based on Fourier transform calculation AC voltage signal amplitude and phase
08/13/2014CN102735926B 基于微机械砷化镓基固支梁的频率检测器及检测方法 Frequency detector micromachined GaAs substrate and clamped beam detection method based on
08/13/2014CN102435842B 双模式频标比对与频率稳定度测量装置 Dual-mode frequency standard comparison with the frequency stability measurement device
08/12/2014US8804129 Method and apparatus for performing film thickness measurements using white light scanning interferometry
08/06/2014CN203759119U 一种电力用户低压谐波在线监测装置 A power user Low harmonic line monitoring device
08/06/2014CN203759118U 一种可搬移式频谱监测测向设备 One kind of spectrum monitoring transportable direction finding equipment
08/06/2014CN203759117U 工频输出频率的检测电路 Frequency output frequency detection circuit
08/06/2014CN203759104U 在隔离状态下测量交流电压和频率的测量电路 Measuring AC voltage and frequency measurement circuit in isolation
08/06/2014CN103969533A 一种音频范围扫描系统 An audio range scanning system
08/06/2014CN103969508A 一种实时高精密的电力谐波分析方法及装置 A high-precision power harmonic analysis method and apparatus for real-time
08/06/2014CN103969507A 一种电能质量谐波分析方法 POWER QUALITY Harmonic Analysis
08/06/2014CN103969506A 一种三相电力电缆谐波损耗计算方法 A three-phase power cables harmonic loss calculation method
08/06/2014CN103969505A 基于插值的随机共振高频弱信号检测方法 Stochastic resonance of high frequency weak signal detection method based on interpolation
08/06/2014CN102508026B 一种电能质量谐波分析仪的谐波分析方法 Harmonic Analysis Method for Power Quality Harmonic Analyzer
08/06/2014CN102207521B 用于估算角频率的方法和装置 The estimated angular frequency method and apparatus for
08/06/2014CN102012457B 使用频率掩模触发的幅度鉴别 Amplitude discrimination frequency mask trigger
08/06/2014CN101819231B 连续计数间隔标记的高分辨率频率测量方法 Continuous counting interval markers resolution frequency measurement method
08/05/2014US8797067 Detection of signals for transmission
07/2014
07/31/2014WO2014116130A1 Optical system for rf wave spectral analysis
07/31/2014WO2014116129A1 Rf signal detection system
07/31/2014WO2014116128A1 Acousto-optic rf signal spectrum analyzer
07/31/2014US20140210451 Condition monitoring by cross-correlation of switching-mode power supplies
07/30/2014CN203745540U 基于振荡分量功率方向的电网低频同步振荡源识别装置 Based on the direction of the oscillation component power grid synchronization of low frequency oscillator source identification device
07/30/2014CN203745534U 医用电参量检测装置 Medical electrical parameters detection device
07/30/2014CN103954835A 一种频率显示装置及其工作方法 A frequency display device and methods of work
07/30/2014CN103954834A Led闪烁频率和波形测试系统及方法 Led blinking frequency and waveform testing system and method
07/30/2014CN102928663B 一种光伏并网发电系统电流谐波指标量化评估方法 A grid system current harmonics indicators quantitative evaluation method of PV
07/29/2014US8791428 Authentication systems for discriminating value documents based on variable luminescence and magnetic properties
07/24/2014WO2014080267A3 Method and apparatus for detection of insulin resistance, diabetes and cardiovascular disease
07/23/2014CN203732626U 基于dsp的谐波检测装置 Harmonic detection device based on dsp
07/23/2014CN203732625U 数字频率计 Digital frequency meter
07/23/2014CN203732624U 一种基于at89c52芯片的单相数字式频率测量仪表 At89c52 chip based on single-phase digital frequency measuring instruments
07/23/2014CN203732155U 基于主动降噪技术的振动声学检测频谱采集装置 Vibro-acoustic detection based on spectral acquisition device active noise reduction technology
07/23/2014CN103941092A 一种频域快速扫描测量的装置 A Frequency Domain quick scan measuring device
07/23/2014CN103941091A 基于改进emd端点效应的电力系统hht谐波检测方法 Improved emd end effect of power system harmonic detection method based on hht
07/23/2014CN103941090A 基于谱线能量插值的谐波测量方法 Harmonic measurement method based on spectral energy Interpolation
07/23/2014CN103941089A 基于dft的正弦信号频率估计方法 Sinusoidal frequency estimation method based dft
07/23/2014CN103941088A 一种基于三相信号的电力系统频率快速测量方法 Based on a three-phase power system frequency signals rapid measurement method
07/23/2014CN103941087A 欠采样速率下的高频余弦信号的频率测量方法及其装置 Less high-frequency cosine signal sampling rate of frequency measurement method and apparatus
07/23/2014CN103941086A 一种超高精度频率测量仪及其测量方法 An ultra-high-precision frequency meter and measurement methods
07/23/2014CN103941085A 低功耗电能采集装置 Low-power energy collection device
07/23/2014CN102735922B 一种低成本单相谐波电能表 A low-cost single-phase energy meter Harmonic
07/23/2014CN102608416B 一种基于互相关技术的双混频时差法测量系统和方法 A dual mixer time difference measurement system and method based on cross-correlation technique
07/16/2014CN203720263U 一种基于fpga的电力谐波检测装置 An fpga based power harmonic detection device
07/16/2014CN203720262U 一种频率特性测量装置 A frequency characteristic measurement apparatus
07/16/2014CN103926462A 一种电力系统谐波快速分析方法及运行装置 A power system harmonic analysis methods and fast running gear
07/16/2014CN103926461A 局放信号空间定位接收频率的选频方法 PD signal spatial positioning receiver frequency frequency selection method
07/16/2014CN103926460A 多谐波源相互影响及其谐波互信息特征提取 Multi-harmonic sources and harmonic interplay of mutual information feature extraction
07/16/2014CN103926456A 基于改进fft的闪变值计算方法及逆变器 Calculation methods and inverter based on the improved value of the fft Flicker
07/16/2014CN102608419B 具有噪声抑制性能的自适应瞬时频率测量方法 Adaptive instantaneous frequency measurement method with noise suppression performance
07/16/2014CN102253282B 纳托尔窗函数连续频谱内插电力谐波参数获取方法 Nuttall window function within a continuous spectrum acquisition method of interpolation parameters power harmonics
07/16/2014CN102227643B 对频谱进行分析的测量方法和测量装置 For spectrum measurement methods and apparatus for analyzing the
07/15/2014US8779787 Apparatus and method for determining variation in a predetermined physical property of a circuit
07/10/2014WO2014107089A1 Broadband frequency detector
07/10/2014DE102013202900A1 Messgerät und Verfahren zur iterativen Detektion mehrerer Signale Instrument and method for iterative detection of multiple signals
07/09/2014CN203705545U 谐波测量电路及电能测试装置 Harmonic measurement circuit and power test device
07/09/2014CN203705544U 交流电源谐波频率检测装置 AC harmonic frequency detection device
07/09/2014CN103913659A 瞬动保护测试仪及其运行方法 Instantaneous protection tester and method of operation
07/09/2014CN103913632A 一种基于振荡分量功率方向的低频同步振荡源识别方法 Based on the low-frequency synchronous oscillation power source identification method oscillatory component direction
07/09/2014CN103913631A 用于数显表的电网频率测量方法和测量系统 For grid frequency measurement methods and systems DRO
07/09/2014CN102890192B 利用多本振组合扫描实现频谱仪不同扫宽下扫描的方法 LO scanning using multiple combinations to achieve the analyzer span under different scanning method
07/09/2014CN102735943B 无源电子标签谐振频率及q值检测传感器 Resonant frequency passive RFID and sensor q value
07/09/2014CN102269803B 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
07/08/2014US8774977 Multiphase electrical power construction and assignment at minimal loss
07/08/2014US8773145 Method for characterizing an electrical system by impedance spectroscopy
07/08/2014US8773133 Adaptive multichannel locator system for multiple proximity detection
07/03/2014US20140184272 Method of signal identification by using ring oscillator based clock and related apparatus thereof
07/03/2014DE102013222179A1 Ein auf digitaler Lokaloszillation basierendes, mit Hochgeschwindigkeitsabtastung betriebenes Hochfrequenzsignal-Spektralmesssystem und das zugehörige Verfahren A system based on digital Lokaloszillation, powered with high-speed scanning radio frequency signal and the corresponding spectral measurement method
07/02/2014CN203688664U 一种电网频率测量装置 One kind of grid frequency measurement device
07/02/2014CN103901318A 在能量转换系统中定位接地故障和绝缘降级状况的方法 Positioning in energy conversion systems and insulated ground fault condition downgrade method
07/02/2014CN103901274A 具有缩放显示的实时谱分析仪 With a zoom display of real-time spectrum analyzer
07/02/2014CN103901273A 电网谐波检测方法和电网谐波检测装置 Harmonic detection method and the harmonic detection device
07/02/2014CN103901272A 一种数字频率计 A digital frequency meter
07/02/2014CN103901271A 一种频率测试方法及系统 A frequency test method and system
07/02/2014CN103901270A 一种基于dsp数字频率计的测试频率方法 A test method for frequency-based digital frequency meter dsp
07/02/2014CN102818921B 一种基于迭代傅里叶变换计算交流电流信号幅值和相位的方法 A calculation based on iterative methods transform alternating current signal amplitude and phase of the Fourier
07/02/2014CN102721870B 基于svd数字滤波器的电力系统谐波分析方法 Power system harmonic analysis method based on digital filter svd
07/02/2014CN102721863B 微波测量线多频率信号的测量方法 Measuring line multi-frequency microwave signal measurement method
07/02/2014CN102680784B 多调度中心广域测量系统联合低频振荡在线监测方法 Multi-joint dispatch center WAMS low frequency oscillation line monitoring method
07/02/2014CN102340313B 采集设备采样丢点测试方法和装置及系统 Acquisition equipment testing methods and sampling points lost device and system
07/01/2014US8768638 Method and device for performing spectrum analysis of a wanted signal or noise signal
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