Object sensing apparatus for an automatic door

Details Object sensing apparatus for an automatic door Object sensing apparatus for an automatic door

1984-08-20

1985-12-24

Smith, Jr., David

Electricity: motive power systems

Automatic and/or with time-delay means

Radiant energy

49 25, 250221, G05B 500

Patent

active

045609128

ABSTRACT:
An object sensing apparatus includes a plurality of light emitting diodes for illuminating a region of space and a plurality of closely arranged light detectors for receiving light reflected from an object. The apparatus is particularly useful in connection with automatically operated doors.

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Optical Target Sensor, by Gordon L. Mitchell, Navy Technical Disclosure Bulletin, vol. 2, No. 3, Mar., 1977.

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