Digital tachometer

Details Digital tachometer Digital tachometer

1976-10-04

1978-06-06

Rolinec, Rudolph V.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

235 92CC, 235 92FQ, G01P 348

Patent

active

040939162

ABSTRACT:
A digital tachometer arrangement in which pulses resulting from rotation of a shaft, are counted over a predetermined time interval. The time interval is established by counting pulses from a high frequency oscillator. The counting of pulses from the high frequency oscillator is begun only at a predetermined instant when the pulses from the rotating shaft attain a positive edge. Relating the beginning of the time interval precisely to a predetermine edge of the pulses from the rotating shaft, provides for a stabilized display which counts the pulses from the shaft during the preset time interval. The count of the pulses from the rotating shaft over the preset time interval, is proportional to the rotational speed of the shaft, and is displayed on a digital readout connected to a binary-coded decimal counter receiving pulses from the rotating shaft.

REFERENCES:
patent: 3748533 (1973-07-01), South
patent: 3808407 (1974-04-01), Ratz
patent: 3852574 (1974-12-01), Bilgutay et al.
patent: 3868570 (1975-02-01), Kopera, Jr.
patent: 3962567 (1976-06-01), Oicles et al.
patent: 3986009 (1976-10-01), Fastaia
patent: 4007419 (1977-02-01), Jasmine

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