Boots – shoes – and leggings
Patent
1979-07-09
1981-05-12
Atkinson, Charles E.
Boots, shoes, and leggings
364426, 235 92FQ, 361240, 303 95, G01P 348
Patent
active
042675758
ABSTRACT:
A system for providing signals to a microprocesser-based control from which instantaneous values of speed can be computed includes a wheel-driven alternator which provides an alternating current output whose frequency varies with wheel speed. A signal processor converts this signal to a series of sensor pulses whose width varies inversely with frequency. A sample pulse is supplied from the microprocessor which sets the period or length of time the sensor pulses are examined for each speed calculation of the microprocessor. The sample period pulses are AND gated with a high rate clock and also with the sensor pulses to provide a series of marker pulses marking the up and down excursions of the sensor pulses. The marker pulses occurring in each sample period are counted directly in a first counter, are supplied to a latch circuit, and from thence to an AND gate which responds to the occurrence of the first marker pulse in the sample period to connect the high rate clock pulses to a second counter for the remainder of the sample period, and to a third counter where the marker pulses act to reset the count to zero. The third counter is also connected to receive the high rate clock pulses so that it counts only the clock pulses occurring after the last marker pulse in the sample period. At the end of the sample period, the counts from all three counters are transferred to the microprocessor which uses this information to compute a value for wheel (or tire) velocity over the sample period. The system continues to provide the input counts to enable the microprocessor to calculate wheel (tire) velocity for each sample period.
REFERENCES:
patent: 3757167 (1973-09-01), Yoshikawa et al.
patent: 3892952 (1975-07-01), Shibata et al.
patent: 4056287 (1977-11-01), Gudat
patent: 4056778 (1977-11-01), Randazzo
patent: 4125295 (1978-11-01), Ruhnau et al.
patent: 4166976 (1979-09-01), Ruhnau et al.
IBM Technical Disclosure Bulletin-"Computer and Apparatus For Measuring Rotational Speed", by S. Bederman, vol. 13, No. 4, Sep. 1970, pp. 1017-1018.
Atkinson Charles E.
Chin Gary
Smith Robert C.
The Bendix Corporation
Thornton William F.
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