Method of frequency discrimination

Details Method of frequency discrimination Method of frequency discrimination

G - Physics

01

R

328/159

G01R 23/15 (2006.01) G01R 23/02 (2006.01)

Patent

CA 2013444

PHN 12.894 26.5.1989 ABSTRACT "A method of frequency discrimination as well as a device suitable for implementing this method." A method of discriminating among frequencies of an a.c. voltage by means of a processor linked to the a.c. voltage, wherein, after detection of a first zero-crossing of the a.c. voltage, a looped program is initiated, the loop comprising a counter counting the number of loop cycles until a second zero-crossing is detected. Then it is determined in which preset interval the count is situated, each interval corresponding with a possibly occurring 10 frequency. (Fig. 1).

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