Sinewave frequency measuring apparatus

Details Sinewave frequency measuring apparatus Sinewave frequency measuring apparatus

1993-03-18

1993-11-16

Wieder, Kenneth A.

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Frequency of cyclic current or voltage

324 7648, 324 7624, 324 7615, 377 50, G01R 2302

Patent

active

052627144

ABSTRACT:
This invention relates to sinewave frequency measuring apparatus and method and more particularly such apparatus including a frequency estimator triggered by a zero crossing of a sinewave and means for producing sample signals at a constant rate; and a method which provides and uses an approximation of the sinewave through the zero crossing, as a straight line between two sampling periods. Errors are eliminated by means of a low pass filter. The method performs a fractional cycle correction by adding or substracting the interpolation results from the raw period time counts.

REFERENCES:
patent: 3036269 (1962-05-01), Trumpy
patent: 3553597 (1971-01-01), Bugay
patent: 3590277 (1971-06-01), South
patent: 3663885 (1972-05-01), Stewart
patent: 3704414 (1972-11-01), Herbst
patent: 3743420 (1973-07-01), Iten et al.
patent: 3839673 (1974-10-01), Acker
patent: 3984773 (1976-10-01), Oda
patent: 4028985 (1977-06-01), Merritt
patent: 4112358 (1978-09-01), Ashida
patent: 4326261 (1982-04-01), Peoples
patent: 4403298 (1983-09-01), May, Jr.
patent: 4438504 (1984-03-01), Favin
patent: 4823060 (1989-04-01), Doemen

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