Communications: electrical – Land vehicle alarms or indicators – Of relative distance from an obstacle
Patent
1992-01-02
1993-08-10
Crosland, Donnie L.
Communications: electrical
Land vehicle alarms or indicators
Of relative distance from an obstacle
340436, 340903, 340514, 342 92, 367 13, B60Q 100
Patent
active
052353150
ABSTRACT:
An object detection system and method for detecting the presence of objects in the path of a vehicle, and in which includes a self test operation. The system includes a transmitter which transmits object detection signals and a receiver which receives reflections of the transmitted object detection signals. A controller is provided for adjusting the gain and signal threshold of the receiver so that the receiver initially is able to detect reflections from irregularities in the ground surface. Once the receiver receives a signal reflected from the ground surface, an indication is provided that the system is in a ready or operable state. Thereafter, the controller adjusts the receiver gain and signal detection threshold so that signals reflected from the ground surface are effectively ignored and only signals reflected from significant objects in the path of the vehicle are detected. An alarm signal is generated in response to the receiver receiving signals reflected from the object. The system may continuously repeat the cycle of alternating between a self test mode and a object detection mode, or intermittently alternate between the self test mode and object detection mode.
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"Automotive Radar: A Brief Review" by Dale M. Grimes, Proceedings of the IEEE, vol. 62, No. 6, Jun. 1974.
Cherry James R.
Raynus Abel
Stevens David P.
Armatron International Inc.
Crosland Donnie L.
Tong Nina
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