Optoelectronic position indicator for a drive system

Details Optoelectronic position indicator for a drive system Optoelectronic position indicator for a drive system

1983-05-25

1985-11-19

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250211K, H01J 314

Patent

active

045544514

ABSTRACT:
An optoelectronic system is employed for determining the position of a movable vehicle control element such as a gas pedal. The system includes an optical carrier which is linked to and moves with the control element. The carrier includes an optical indicator range which provides a continuously variable gradient of optical permeability over the limits of carrier movement. A light source and an electro-optical detector are arranged to generate an electrical signal indicative of a measure of optical permeability of a zone of the range in registry with the detector. The light source and detector may be positioned on the same or opposite sides of the carrier. A further range of the same or different configuration may be formed on the carrier and associated with a second light source-detector. The signals generated by each detector are processed to generate a signal indicative of the position of the control element. Optionally, a signal generated by a single detector comprises the position indicative signal.

REFERENCES:
patent: 3708681 (1973-01-01), Ivers
patent: 4152579 (1979-05-01), Feinland
patent: 4284885 (1981-08-01), Swensen
patent: 4314153 (1982-02-01), Humphries et al.
patent: 4320293 (1982-03-01), Guretzky
patent: 4442351 (1984-04-01), Pfeifer et al.

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