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Matches 201 - 250 out of 2,141

Document Document Title
JP5389311B2  
JP2013250231A
To quickly and highly accurately detect a phase difference between two AC signals.A phase difference operation part calculates a phase difference φr(=φ2-φ1) of two detected voltages v1(phase angle φ1), v2(phase angle φ2). After oper...  
JP5322391B2
To provide a terminal tool for detecting a voltage phase that can obtain high measurement precision irrespective of a size or a shape of an insulation electrical wire of an electrical path of which the voltage phase is to be measured in ...  
JP2013205147A
To provide a phase display unit capable of easily indicating a phase difference between three-phase AC currents at two points.The phase display unit indicates a phase difference of the phases corresponding to each other at the two points...  
JP2013195222A
To calculate an effective value and a phase difference of an AC signal easily.When an AC voltage and an AC signal are detected and then filter sections 51 and 52 extract a fundamental wave component, arithmetic processing in the filter s...  
JP2013190301A
To provide a phase detector capable of stably detecting a phase.A phase detector 10 comprises an oscillation circuit 9 that oscillates a phase θi to be synchronized with an AC system voltage V1, generates a waveform V2 with a phase φ o...  
JP2013167500A
To accurately detect a phase of an input signal while reducing influence of unbalanced components and harmonic components.A phase detection device 10 comprises: a fundamental wave orthogonal component calculator 10A that includes a three...  
JP5268969B2
To provide a digital test plug available for both CTT and PTT, and capable of preventing unexpected accidents, such as, electrical shocks and measuring electric power, and so on. The digital test plug includes: common conductors 24, disp...  
JP5255930B2  
JPWO2011151907A
Voltage amplitude for which it asked according to the square integration operation of continuous voltage instantaneous value data of at least three points sampled on frequency more than twice the sampling frequency of alternating current...  
JPWO2011151907A1
測定対象となる交流電圧の周波数の2倍以上 のサンプリング周波数でサンプリングした連 続する少なくとも3点の電圧瞬時値データの 二乗積分演算により求めた電圧振幅を正...  
JP5217075B2  
JP5214163B2  
JP5188449B2  
JP5181427B2  
JP2013053929A
To provide a phase-contrast measurement system capable of accurately measuring a phase contrast by improving a way of processing by a Lissajous method.A phase-contrast measurement system 1 comprises: an A/D converter 7 that applies A/D c...  
JP5165712B2  
JP5154594B2  
JP5119291B2  
JP5103840B2  
JP5103710B2  
JP5092490B2  
JP5076730B2  
JP2012211896A
To provide a method of determining at least one parameter (frequency, phase angle, amplitude) of a sinusoidal signal generated by a power grid.The frequency of the signal is determined iteratively based on a linear relationship among the...  
JP5055016B2  
JP5022545B2  
JPWO2010098460A1
デジタル回路を用いて位相差を高精度に計測 できる位相測定装置を実現する。位相測定装 置1は、それぞれTDCを用いたバッファ遅 延測定回路110と位相差測定回路12...  
JPWO2010098460A
A phase measuring device which can measure phase contrast with high precision using a digital circuit is realized. Phase measuring device 1 is provided with buffer delay measuring circuit 110 which used TDC, respectively, phase contrast ...  
JP5006190B2  
JP4973498B2  
JP2012108085A
To provide a harmonic calculation parameter analysis apparatus which accurately estimates a harmonic calculation parameter and is so accurate as to estimate a worst value of the harmonic calculation parameter, and a harmonic calculation ...  
JP2012093341A
To detect frequency of input signals, the frequency being unknown or changing over time, without using a PLL.A signal detection apparatus 1 includes a control block composed of a band-pass filter 2 whose coefficient a1 is variable, a fir...  
JP2010212929A5  
JP4887322B2  
JP2012026738A
To give means for performing binary phase detection with a high signal-to-noise ratio for a feeble micro wave signal.In the state where a signal desired to detect is inputted to a resonator, the resonator is parametric-oscillated. By uti...  
JP2011247852A
To provide a phase detection method of an AC signal having one or more phases, of which a frequency range is preliminarily known, of a voltage or the like of a power system.Following steps (a) to (f) are repeatedly executed; the step (a)...  
JP4833775B2  
JP2011242195A
To simply discriminate a phase of a distribution line of each phase constituting a high-voltage distribution line using an inexpensive apparatus in a phase discrimination portion.A phase discrimination apparatus includes: firstly measuri...  
JP2011242211A
To provide a phase difference measuring device capable of continuously and stably measuring the phase difference between two input signals in a range of 0 to 360 degrees.A phase difference is calculated by subjecting two input signals R ...  
JP2011208975A
To provide a device for detecting a phase angle difference of a power system capable of detecting accurately a voltage phase angle difference between optional nodes in the power system easily without requiring complicated calculation.A t...  
JP2011179988A
To provide a digital test plug available for both CTT and PTT, and capable of preventing unexpected accidents, such as, electrical shocks and measuring electric power, and so on.The digital test plug includes: common conductors 24, dispo...  
JP4771572B2  
JP4773078B2  
JP4766434B2  
JP4767907B2  
JP4765100B2  
JP2011169625A
To quickly and accurately detect a phase difference between two signals.The phase difference detection device 1, for detecting a phase difference between detection signals S1 and S2, includes a signal detection part 2 detecting the detec...  
JP4761724B2  
JP4723652B2  
JP2011122907A
To notify a user of erroneous connection intelligibly, even in the case of an inexpensive segment type liquid crystal or 7-segment LED which is a main current of an electronic indicating instrument.This instrument includes a measuring op...  

Matches 201 - 250 out of 2,141