Communications: electrical – Land vehicle alarms or indicators – Of collision or contact with external object
Patent
1988-03-29
1990-01-02
Goldstein, Herbert
Communications: electrical
Land vehicle alarms or indicators
Of collision or contact with external object
180169, 356 3, B60Q 100
Patent
active
048916242
ABSTRACT:
The detection system for obstruction to vehicle according to the invention comprises a plurality of light emitting elements disposed in the rear of a car, a modulation for emitting modulation lights from the light emitting elements, light receiving elements for receiving the reflected light that the modulation light comes in contact with an external obstruction to reflection, a detection circuit for detecting output signals of the light receiving elements, thus detecting the obstruction from an output of the detection circuit, and a rearward obstruction can be detected securely particularly when the car moves backward, a new light source for obstruction detecting is not particularly required, and thus no area must be prepared for installation.
REFERENCES:
patent: 3601792 (1971-08-01), Murray
patent: 3604805 (1971-09-01), Scott
patent: 3790780 (1974-02-01), Helmcke et al.
patent: 3950098 (1976-04-01), Caine
patent: 4278962 (1981-07-01), Lin
patent: 4467313 (1984-08-01), Yoshino et al.
patent: 4528563 (1985-07-01), Takeuchi
Ishikawa Kiyomitsu
Kimura Shigeru
Tanabe Tohru
Yamada Kazuhiko
Goldstein Herbert
Jackson Jill D.
Stanley Electric Co. Ltd.
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