Obstacle detecting apparatus using ultrasonic waves

Details Obstacle detecting apparatus using ultrasonic waves Obstacle detecting apparatus using ultrasonic waves

1976-12-06

1978-07-25

Farley, Richard A.

Communications: electrical

Selective

340 3C, G01S 968, G01S 754, G01S 756

Patent

active

041032780

ABSTRACT:
The present invention relates to an obstacle detecting apparatus using ultrasonic waves, wherein an ultrasonic transmitter-receiver and an ultrasonic receiver are provided at a desired interval, and thereby the distance and the direction to the obstacle are obtained by the intersecting point between the circular locus of the first reflected wave returning after reflection at the obstacle, and the elliptical locus of the second reflected wave to the ultrasonic receiver. Under this structure, when any person or any obstacle like a building exists within the dead angle of a motor vehicle in case a driver is going to back it, the driver is informed of the distance and the direction to the obstacle by means of the obstacle detecting apparatus using ultrasonic waves.

REFERENCES:
patent: 3234502 (1966-02-01), Sicuranza
patent: 3380028 (1968-04-01), Gustafson et al.

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