Speed control systems for governing the speed of a vehicle

Details Speed control systems for governing the speed of a vehicle Speed control systems for governing the speed of a vehicle

1980-05-05

1982-12-21

Gruber, Felix D.

Boots, shoes, and leggings

180179, 235 92EC, 235 92NT, 340670, B60K 3100, G05D 1362

Patent

active

043652980

ABSTRACT:
A tachometer signal provides input to first and second parallel connected channels, each of the channels comprising in series operational amplifier, threshold detector, and counting devices. A comparator checks that the same count is registered by the counters of both channels. Each of the threshold detectors is biased to require a minimum amplitude over and under tachometer pulse input in order to deliver an output to the pulse counter of the associated channel. Attenuating circuits act on the inputs of the operational amplifiers of both channels during predetermined intervals to check that the amplitude of the tachometer pulses is sufficient to be counted by the tachometer counters. Dynamic checking circuits are provided to check the integrity of the attenuating system.

REFERENCES:
patent: 3525044 (1970-08-01), Richmond
patent: 3868570 (1975-02-01), Kopera, Jr.
patent: 4084659 (1978-04-01), Abend

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