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Patent Searching and Data


Matches 601 - 650 out of 2,047

Document Document Title
JPH09140147A
To overcome a problem by erroneous wiring of cables by outputting a phase difference compensating value with any one phase of the angle data and input phase voltage of the phase sequence detecting means. An angle data generating means 41...  
JPH09133718A
To correct a phase by the amplitude of an AC system voltage so as to properly detect a phase even when an accident occurs because when an accident occurs in the AC system during phase detection, the amplitude of the AC system becomes sma...  
JPH09505143A  
JPH09123911A
To measure the periodically changing alternating current waveform with high accuracy even when it is disturved. In a phase-shift detecting method, a standard time interval given by integer times the period is determined, (1) the time fro...  
JPH0989946A
To precisely detect an A.C phase and a zero cross point. A transducer 1 drops an A.C. voltage 100, and a voltage comparator 2 compares a secondary voltage of the transducer 1 with a ground voltage. A pulse generator 3 produces a phase si...  
JP2594141B2  
JP2591137B2  
JP2619194B2
PURPOSE: To detect a step-out state without using a threshold, value by measuring power and voltage and detecting an oscillatory phenomenon in power system. CONSTITUTION: A measuring unit 1 is used for measuring active power and effectiv...  
JPH0961472A
To realize a phase difference measuring apparatus having small circuit scale and improving the measuring accuracy. The phase difference measuring apparatus simultaneously fetches a pair of first and second signals having different phases...  
JP2584459B2  
JP2578373B2  
JPH0926445A
To rapidly calculate phase angle by inputting two signals of AC voltage and AC power supply voltage obtained by converting AC power supply current to a pulse gate circuit between phase angles, and being based on a pulse increase obtained...  
JPH0921835A
To simplify constitution and shorten computation time by providing a zero phase detection part for detecting the voltage zero phase, a phase error correction part for correcting sampling errors of a digital control system and the like. A...  
JPH0915276A
PURPOSE: To make it possible to measure phase difference with high resolution and high accuracy. CONSTITUTION: A waveform shaping circuit 2a shapes the waveform of a signal to be measured. A phase shifter 3 makes the phase of a reference...  
JP2572575B2  
JP2521658Y2  
JP2559103B2  
JP2560007B2  
JPH08316826A
PURPOSE: To incorporate a device generating an operating clock synchronism with an external clock into a microcomputer with a comparatively small circuit area. CONSTITUTION: A signal period detection circuit 3 coding a period of an exter...  
JPH08304483A
PURPOSE: To correctly obtain a power source phase with a high detection frequency by compensating for a phase error detected with a first frequency by means of a second frequency. CONSTITUTION: The apparatus has an angular velocity opera...  
JPH08304484A
PURPOSE: To detect a voltage of a power source or a phase of a current without being influenced by a distortion of the voltage of the power source, by integrating an angular velocity output from an adding means and outputting an integrat...  
JP2554511B2  
JPH08298457A
PURPOSE: To set the number of bits optionally by comparing phase differences of two input signals and providing a specific pulse signal when it is detected that the phase difference is within a preset phase difference. CONSTITUTION: An i...  
JPH08262075A
PURPOSE: To enable accurate measurement of a phase difference even when the frequency, amplitude and DC level of a measuring signal are varied. CONSTITUTION: A signal for correction of which the phase difference is known is prepared from...  
JPH08248071A
To enhance the phase resolution by providing a memory for temporarily storing a binary word, and the like. A reference signal R is fed to the input terminal of a shift register 1 which is clocked by a master clock TM and a slave clock TS...  
JP2534686B2  
JPH08233839A
To provide an X-ray device suitable for a driving motor of a rotary anode such as an induction motor in which only a small phase angle change is measured between at a stopping state and at an operating rotary speed. The apparatus consist...  
JPH08220156A
PURPOSE: To facilitate countermeasure against corona while reducing the size by providing an antenna having an electrode for detecting the ground voltage and transmitting/receiving the radio wave, i.e., providing an antenna also serving ...  
JP2527011B2  
JP2527009B2  
JP2527008B2  
JP2523890B2  
JPH08201452A
PURPOSE: To provide a highly reliable phase measuring apparatus which operates definitely. CONSTITUTION: The phase difference measuring apparatus comprises a circuit 24 for detecting the phase difference between first and second input si...  
JPH08201182A
PURPOSE: To easily and accurately detect the phase difference between light signal and electrical signal by directly calculating the product of a voltage signal and a light signal by a photoconductive type light receiver and detecting th...  
JPH08194024A
PURPOSE: To provide a phase difference detection circuit capable of highly precisely detecting a phase difference between a measured signal of frequency corresponding to the number of rotation of a motor, etc., and a standard signal. CON...  
JP2543313B2
PURPOSE: To detect the ground fault of an isolated or high-resistance-grounded three-phase one-circuit transmission line with a phase voltage detector installed to one phase and, at the same time, to detect the ground-fault phase. CONSTI...  
JPH08178981A
PURPOSE: To highly accurately detect a slight shift in phase by accumulating difference between a monitored waveform at a sampling point and a reference waveform and determining the shift in phase from the direction of a fluctuation in t...  
JP2533432B2
PURPOSE: To provide a circuit for detecting voltage applied to a measurement object and a time interval corresponding to the phase difference of current flowing through the object, using the less quantity of parts including transistors, ...  
JPH08149173A
PURPOSE: To provide an absolute phase detection circuit by subtracting a mean value of difference information for a synchronization word block from phase information so as to process absolute phase processing thereby eliminating the need...  
JPH08146056A
PURPOSE: To simplify the configuration of a controller by accurately detecting the phase difference of two signals with a slight phase difference and at the same time, using a phase difference detection circuit. CONSTITUTION: The phase d...  
JPH08146055A
PURPOSE: To accurately measure the phase difference of a target signal in a signal transmission circuit including a large noise signal. CONSTITUTION: In a signal transmission circuit 2, a voltage detector 3 and a current detector 4 are a...  
JP2505247B2  
JPH08136596A
PURPOSE: To obtain a phase-difference measuring apparatus by which the phase difference (the very small time difference) between two signals at an identical frequency can be measured with high accuracy by reducing the required number of ...  
JPH08116253A
PURPOSE: To output control signal of the same pulse width independently of a lead phase of any clock signal so long as the phase difference between two clock signals is the same. CONSTITUTION: N-channel MOS TRs 2, 3 are connected in para...  
JPH08105923A
PURPOSE: To provide a zero adjusting device and a method therefor in which a zero adjustment can be easily, smoothly and precisely performed by one push of a switch by use of a digital circuit, and stably kept for a long time. CONSTITUTI...  
JPH08103020A
PURPOSE: To eliminate erroneous judgment of a step-out even when a power system is fluctuated near a the limit. CONSTITUTION: The step-out detector for a power system comprises a measuring unit 2 for detecting various electric quantities...  
JPH08101235A
To provide a digital method and device, which enable the accurate measurement even in the case where an analog/digital converter includes an allowable tolerance and a drift around an operating point is generated. (multiplexer). Direct cu...  
JPH08503077A  
JPH0882643A
PURPOSE: To obtain a pulse phase difference encoding circuit of which the range of errors is uniform and the precision is excellent. CONSTITUTION: This circuit is equipped with a pulse circling circuit 10 formed of a large number of inve...  
JPH0875876A
PURPOSE: To provide stable pulse phase difference data of a plurality of pulse signals sent at irregular timing. CONSTITUTION: A first pulse signal PA and a plurality of detected pulse signals PB at different timing are sent to a pulse p...  

Matches 601 - 650 out of 2,047