Vehicle velocity sensing apparatus and method

Details Vehicle velocity sensing apparatus and method Vehicle velocity sensing apparatus and method

1986-11-26

1988-07-05

Hix, L. T.

Electricity: electrical systems and devices

Electrical speed signal processing systems

324163, H01H 4700, G01P 346

Patent

active

047559055

ABSTRACT:
Automatic guided vehicles require an accurate method and apparatus for determining vehicle velocity. The subject apparatus is associated with a vehicle having at least one surface engaging idler wheel. A resolver produces a rotation angle rate signal having a value responsive to the angular rotation rate of the idler wheel. A resolver-to-digital converter receives the rotation rate angle signal and produces a rotation rate pulse signal. A clock substantially continuously produces clock pulse signals having a predetermined frequency. A counter receives the rotation rate pulse signal and the clock pulse signal and controllably produces a time signal corresponding to the number of clock pulses received over the duration of a predetermined portion of the rotation rate pulse signal. A logic device controllably receives the time signal and produces a vehicle velocity signal.

REFERENCES:
patent: 4152645 (1979-05-01), Bendler
patent: 4199719 (1980-04-01), Grob
patent: 4268792 (1981-05-01), Grob
patent: 4355364 (1982-10-01), Gudat
patent: 4369651 (1983-01-01), Szentes
patent: 4506339 (1985-03-01), Kuhnlein
patent: 4529932 (1985-07-01), Doueihi et al.

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