Travel-distance signal generator for vehicles

Details Travel-distance signal generator for vehicles Travel-distance signal generator for vehicles

1980-06-03

1983-06-07

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

324175, G01D 534

Patent

active

043872999

ABSTRACT:
A signal generator which generates one pulse for each predetermined distance of travel of a vehicle. A rotary member is driven by the rotation of a wheel of the vehicle, and the rotary member has arranged thereon reflecting and non-reflecting portions alternately with each other about a rotary shaft of the rotary member. A pair of optical transmission lines are disposed to confront at one end the surface of the rotary member on which the reflecting and non-reflecting portions are arranged. Light is emitted from a light emitting element to the other end of one of the optical transmission line, and light reflected by the rotary member is incident to the other optical transmission line and received by a photo detector provided at the other end of the optical transmission line. In dependence on whether the reflecting or non-reflecting portion of the rotary member lies opposite to the optical transmission lines, the output from the photo detector varies to provide a travel-distance signal.

REFERENCES:
patent: 4162399 (1979-07-01), Hudson
patent: 4204115 (1980-05-01), Boldridge
patent: 4247769 (1981-01-01), Warner

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