Digital wheel speed sensor

Details Digital wheel speed sensor Digital wheel speed sensor

1979-09-27

1981-05-26

Atkinson, Charles E.

Boots, shoes, and leggings

364426, 303103, 324160, G06F 1520, B60T 800

Patent

active

042701767

ABSTRACT:
An apparatus for precisely measuring the period of a wheel signal generated by a transducer in a brake control system includes a clock for generating a periodic clock signal, a first counter for maintaining a count of clock signal cycles, a second counter for maintaining a count of wheel signal cycles, a gate for selectively enabling and disabling the first and second counters at substantially the same phase angle of the wheel signal, and a computer programmed to read the first and second counters, to control the gate to enable the first and second counters for a period of time, and then to read the first and second counters again to arrive at measure of the elapsed time and the number of wheel signal cycles occurring during the measurement period.

REFERENCES:
patent: 3757167 (1973-09-01), Yoshikawa et al.
patent: 3922534 (1975-11-01), Gerstenmeier et al.
patent: 4072364 (1978-02-01), Gudat et al.
patent: 4125295 (1978-11-01), Ruhnau et al.
patent: 4166976 (1979-09-01), Ruhnau et al.
patent: 4179656 (1979-12-01), Wagner
patent: 4184203 (1980-01-01), Skarvada

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