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Patent Searching and Data


Matches 201 - 250 out of 2,101

Document Document Title
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...  
JP4688390B2  
JP4681731B2  
JP4667918B2  
JP4656652B2  
JP4657151B2  
JP4628096B2  
JP4593993B2  
JP2010266411A
To provide a synchronous phasor measuring device capable of further improving high-speed and high-precision properties. This synchronous phasor measuring device includes a voltage-measuring section 1 for generating analogue data in a tim...  
JP2010258605A
To provide a pulse detector which generates a sample hold signal and holds a signal level of a high-frequency signal even though the attenuation of the signal level is slow when a load having a high Q value to generate plasma is connecte...  
JP2010212929A
To provide a PLL performance measuring device accurately evaluating a PLL circuit.A moving average for a phase error detected in a phase locked loop circuit is obtained. On the basis of the comparison of the moving average and a threshol...  
JP4513077B2  
JP2010161797A
To provide a high performance phase detector including a local digital oscillator for generating a digital reference signal of programmable frequency and phase. A phase detector accumulates a difference in phase between a digital referen...  
JP2010151781A
To provide a frequency estimation method for shortening a processing time while being low in calculation load, and to provide a frequency estimation device, a surface shape measurement method, and a surface shape measurement device. The ...  
JP2010141933A
To provide a high performance phase detector including a local digital oscillator which generates a digital reference signal of programmable frequency and phase. A phase detector accumulates a difference in phase between the digital refe...  
JP4473218B2  
JP4436065B2  
JP2010014616A
To provide an inexpensive phase detector as compared with the conventional example for instantaneously detecting phase jump in frequency variation or phase variation of a single phase alternating current voltage due to a simple configura...  
JP4398198B2  
JP2009300089A
To provide a new mechanical synchronism detector capable of greatly reducing the size, the weight and cost, while following excellent visibility by a conventional mechanical rotary pointer.In this synchronism detector for indicating a ph...  
JP4382591B2  
JP4374271B2  
JP4376081B2  
JP2009247086A
To solve problems related to the installation site of a phase detector and realize a wide variety of applications utilizing phase information.A phase detection system for electric power systems detects the phases of alternating-current v...  
JP2009186345A
To detect accurately a phase at a prescribed point of time of a measured signal on which a harmonic is superimposed.This device is equipped with a correlation calculation part 4 for determining an autocorrelation function Dc of a measure...  
JP4317923B2  
JP2009176107A
To smoothly conduct a loop switching by rapidly and accurately obtaining the phase difference of an identical phase to early determine the right and wrong of the opening/closing of switches, and preventing a cross current impacting the d...  
JP4297065B2  
JP4283931B2  
JP4242550B2  
JP2009014432A
To provide a method for detecting an amplitude and a phase of a sine-wave signal to be measured by using only a sampling processing, through no orthogonal synchronous detection and no phase detector.The sine-wave signal to be measured is...  
JP4195520B2  
JP2008292192A
To provide a transformer tester for accurately and rapidly measuring an electronic transformer.This transformer tester is used for comparing the secondary output of a tested transformer structured as an electronic transformer with the se...  
JP4187140B2  

Matches 201 - 250 out of 2,101