Engine speed measuring device with plural counters for averaging

Details Engine speed measuring device with plural counters for averaging Engine speed measuring device with plural counters for averaging

1990-10-26

1992-09-08

Strecker, Gerard R.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

324 78D, 364565, G01P 3481, G01P 3489, G01R 2310

Patent

active

051461625

ABSTRACT:
In the revolution frequency indication apparatus in which the revolution frequency of a rotating body is measured and indicated according to a sensor pulse obtained from a revolution sensor mounted on said rotating body or its surrounding, a revolution frequency indication apparatus comprising an indication updating time counter circuit which counts predetermined indication updating time intervals, and a revolution frequency measurement portion which measures the revolution frequency of said rotating body by means of a sensor pulse entered within a measurement time interval of said counter circuit.

REFERENCES:
patent: 3757167 (1973-09-01), Yoshikawa et al.
patent: 4434470 (1984-02-01), Thomas et al.
patent: 4485452 (1984-11-01), Cording et al.
patent: 4527248 (1985-07-01), Takase et al.
patent: 4794551 (1988-12-01), Yoshida
patent: 4885710 (1989-12-01), Hersberger et al.
patent: 4977525 (1990-12-01), Blackwell

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