Rear obstacle detecting system for automotive vehicles

Details Rear obstacle detecting system for automotive vehicles Rear obstacle detecting system for automotive vehicles

1981-06-30

1983-09-13

Groody, James J.

Communications: electrical

Selective

Having indication or alarm

340 34, 340 70, 367909, G08G 100

Patent

active

044045417

ABSTRACT:
A rear obstacle detecting system for automotive vehicles includes an ultrasonic transmitter/receiver unit, distance detecting unit and an indicator for measuring distance to an obstacle while a vehicle is in backward movement. The ultrasonic transmitter/receiver unit having a ultrasonic vibrator is always energized as long as the vehicle is in an operating condition irrespective of whether the vehicle is in a backward movement or not, in order to maintain the ultrasonic vibrator being vibrated to achieve a self-cleaning function. The indicator is energized only when the vehicle is in backward movement.

REFERENCES:
patent: 4015232 (1977-03-01), Sindle
patent: 4278962 (1981-07-01), Lin

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