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Patent Searching and Data


Matches 201 - 250 out of 2,060

Document Document Title
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  
JP4376081B2  
JP4374271B2  
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  
JP2008281498A
To provide a phase difference measuring circuit that can measure the difference of transition timing regardless of advance or delay of the 2 signals.EXOR 11 outputs a signal S3 that has a pulse width corresponding to the phase difference...  
JP4171699B2  
JP2008249472A
To provide a system and device capable of accurately measuring a phase difference of an AC electrical quantity between two points without electrically connecting the two points mutually, even when each frequency of input waveforms on the...  
JP2008245003A
To provide an apparatus for driving and measuring at a plurality of frequencies for a spherical surface acoustic wave (SAW) element, capable of driving and measuring at the plurality of frequencies in spite of a configuration using a sin...  
JP4142608B2  
JP2008185449A
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 ...  
JP4123571B2  
JP2008164418A
To largely improve the measurement accuracy and measuring dynamic of a vector network analyzer (VNA).The 7 port joint is used for the VNA for measuring an S parameter of a device DUT to be measured. The wave from a power supply VS is put...  
JP2008154452A
To provide a step-out detecting apparatus capable of surely detecting a step-out among a group of generators at both sides of interconnected lines in a power system, irrespective of the predetermined difference in phase angles.The step-o...  
JP4092617B2  
JP2008516253A  
JP2008076175A
To provide a technology capable of accurately detecting the peak position of an analog signal even if the amplitude of the analog signal changes.A reference position detecting section detects two time positions where a signal level of th...  
JP4067876B2  
JP2008064523A
To provide an amplitude calculation device, impedance measuring device, amplitude calculation method and impedance measuring method equipped with the same capable of simply and quickly obtaining the amplitude of the AC signal in the meas...  
JP4041269B2  
JP4038484B2  
JP2008500519A  
JP4030606B2  
JP2007538225A  
JP4027418B2  
JP2007325429A
To provide a rotation phase angle measuring device capable of highly accurately measuring an electric quantity, even for a power system having a large number of noise deviated from a reference wave. This rotation angle measuring device p...  
JP4019347B2  
JP4012747B2  
JP2007274870A
To provide a method and a device for determining the varnish impregnation state of a coil nondestructively, and to provide a process for manufacturing an armature. An impulse waveform Pb before impregnation which is a response waveform w...  
JP2007271394A
To precisely detect the phase of an incoming signal containing high-frequency noise. This detection device includes an average period detector for detecting an average period of the incoming signal varying periodically, a converter for c...  
JP2007209194A
To provide an X-ray apparatus suitable for a rotary-anode drive motor, such as an induction motor where only small phase angle variations are measured, between standstill state and the operating rotational speed. The apparatus comprises ...  
JP3932090B2  
JP3919066B2  
JP3956062B2
To reduce a data error rate owing to errors caused by interpolation. A sum (9Si+1+9Si) of a nine-fold value (9Si+1) obtained by multiplying a sample value delayed by a delay element 21 by nine by means of an adder 22 and also a bit shift...  

Matches 201 - 250 out of 2,060