Ultrasonic wave reception apparatus and obstacle detection appar

Details Ultrasonic wave reception apparatus and obstacle detection appar Ultrasonic wave reception apparatus and obstacle detection appar

1993-06-17

1996-12-03

Peng, John K.

Communications: electrical

Land vehicle alarms or indicators

Of relative distance from an obstacle

340903, 340943, 340436, 280734, 180167, 180169, 367 93, 367 94, 338114, 338 13, 338 15, 338 18, B60Q 100

Patent

active

055812325

ABSTRACT:
An obstacle detection apparatus includes a rubber-like elastic body interspersed with electroconductive particles, and means for applying a voltage to the rubber-like elastic body to obtain an ultrasonic wave reception signal from a change in electrical resistance of the elastic body. An ultrasonic wave transmission apparatus is mounted on a support member for transmitting an ultrasonic wave outward. The rubber-like elastic body interspersed with electroconductive particles is provided along an outer periphery of the support member, and a voltage is applied to the rubber-like elastic body to obtain an ultrasonic wave reception signal from a change in electrical resistance of the elastic body as a result of receiving the ultrasonic wave reflected from an obstacle.

REFERENCES:
patent: 2443471 (1948-06-01), Mason
patent: 2964272 (1960-12-01), Olson
patent: 3464657 (1969-09-01), Bullard
patent: 3703999 (1972-11-01), Forys et al.
patent: 4142074 (1979-02-01), Corbett
patent: 4674073 (1987-06-01), Naruse
patent: 4795123 (1989-01-01), Forward et al.
patent: 4849668 (1989-07-01), Crawley et al.
patent: 5261505 (1993-11-01), Holrogel et al.

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