Digital phase measurement method

Details Digital phase measurement method Digital phase measurement method

1984-02-29

1986-08-19

Tokar, Michael J.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Phase comparison

324 83R, G01R 2500

Patent

active

046072187

ABSTRACT:
In a method for the mathematical, digital measurement of the phase difference of two periodic or cyclic signals U and V of the same frequency by averaging from n elementary measurements Mi, a timing signal of a much higher frequency and asynchronous with signals U and V is counted between directly succeeding zero pasages of signals U and V in the same direction. An elementary calibration Ci is performed in each cycle of U, in which an elementary measurement Mi is performed by counting the timing signals during the complete cycle of U. An overall phase difference is determined, in that the mean value of all the elementary measurements Mi is divided by a mean value of all elementary calibrations Ci and is multiplied by the cycle.

REFERENCES:
patent: 3286176 (1966-11-01), Birnboim
patent: 3512085 (1970-05-01), Peterson
patent: 3553596 (1971-01-01), Thompson
patent: 3579104 (1971-05-01), Pignard
patent: 3820022 (1974-06-01), Watt
patent: 4215308 (1980-07-01), Kusters
patent: 4419624 (1983-12-01), Brown

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