Speed measurement system

Details Speed measurement system Speed measurement system

1982-03-22

1984-11-27

Krass, Errol A.

Boots, shoes, and leggings

324166, 377 19, 377 23, 377 26, G01P 348, G01R 2302

Patent

active

044854528

ABSTRACT:
A speed measurement system including a magnetic pickup positioned in proximate relation to a driven element of a gas turbine engine having a plurality of discontinuities therein. The pickup providing a pulse per every discontinuity and thus a multiplicity of pulses for every revolution of the driven element. Conditioning circuitry connected to the pickup for generating a strobe pulse signal for every discontinuity. Interval measuring circuitry receiving interval signals asynchronous to the strobe pulses of a predetermined period which are to form a measurement period which is exactly related to a count of the strobe pulses over a measurement period. Additionally included is circuitry used to lengthen the measurement period up to a maximum of N intervals for increasing the low frequency response of the system.

REFERENCES:
patent: 3757167 (1973-09-01), Yoshikawa et al.
patent: 3829785 (1975-08-01), Schroder et al.
patent: 3917927 (1975-11-01), Minton
patent: 4164648 (1979-08-01), Chu
patent: 4267575 (1981-05-01), Bounds
patent: 4281388 (1981-07-01), Friend et al.
patent: 4355364 (1982-11-01), Gudat
patent: 4368426 (1983-01-01), Hayashi et al.

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