An optical object detection system for sensing obstructions to low speed vehicles
Burman, George Alfred
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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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