Method and device for measuring rotation speed of rotating...

Details Method and device for measuring rotation speed of rotating... Method and device for measuring rotation speed of rotating...

2008-02-01

2010-11-16

Khuu, Cindy H (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system

Speed

Reexamination Certificate

active

07835883

ABSTRACT:
A rotation speed measuring device includes a position sensor outputting position signals indicating M (M >2) rotation positions of equal phase difference per rotation of the rotating equipment, a clock signal generator generating a clock signal; a counter counting the pulses of the clock signal; a measuring interval setting unit setting a duration coefficient indicating the ratio of a measuring interval during which the number of pulses is to be counted within a time period between two successively occurring position signals, to the entire time period between the two position signals; and causing the counter to count the number of pulses during the measuring interval; and a calculating unit calculating the rotation speed of the rotating equipment as a function of the frequency of the basic clock signal, the integer M, the duration coefficient, and the count value obtained by the counter.

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patent: 2001-298982 (2001-10-01), None

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