An optical object detection system for sensing obstructions to low speed vehicles

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Author
Burman, George Alfred
Date
1972-06Advisor
Sackman, G.L.
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Show full item recordAbstract
An object detection system to sense obstructions in the path of
low speed vehicles is described. The system uses a pulsed GaAs
diode laser as an illuminator, and a PIN photodiode as a detector.
Reliable detection of objects with an effective area as small as
2
0.5 ft was achieved. A signal processor using active filters and a
phase-locked loop tone decoder was employed for both phase and
frequency rejection of undesired signals, and detection of objects under
high ambient light conditions.
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