Wheel speed sensor

Details Wheel speed sensor Wheel speed sensor

1988-01-25

1989-05-30

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Electrical speed measuring

Including speed-related frequency generator

324 60CD, 324174, G01P 348

Patent

active

048354678

ABSTRACT:
A magnetoresistive sensor monitors the passing of teeth on a rotating wheel and generates a DC biased speed signal. An amplifier compares this voltage with the capacitor voltage and charges or discharges the capacitor through a pair of parallel coupled, oppositely poled diodes to maintain the capacitor voltage equal to the DC biased speed signal. The voltage across the diode pair is supplied to a comparator switch to provide a pulse train having a frequency that is a measure of the rotational speed of the wheel.

REFERENCES:
patent: 3569737 (1971-03-01), Bauer et al.
patent: 3617715 (1971-11-01), Dummermuth
patent: 3758858 (1973-09-01), McCue
patent: 3868570 (1975-02-01), Kopera
patent: 4086532 (1978-04-01), Aronson et al.
patent: 4281388 (1981-07-01), Friend et al.
patent: 4626781 (1986-12-01), Forkel

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