Communications: electrical – External condition vehicle-mounted indicator or alarm – Transmitter in one vehicle only
Patent
1981-11-12
1984-08-21
Brigance, Gerald L.
Communications: electrical
External condition vehicle-mounted indicator or alarm
Transmitter in one vehicle only
340903, 340943, 367111, 367909, G08G 100, G08B 1316
Patent
active
044673132
ABSTRACT:
An automotive rear safety checking apparatus which comprises a plurality of obstacle detectors mounted on the rear part of the automobile for radiating ultrasonic wave on the watching areas smaller in width than the width of the automobile respectively and detecting the ultrasonic wave reflected from an obstacle. The ultrasonic wave is radiated from the obstacle detectors in time division. Pulse signals in the number associated with the distance between the obstacle detector and the obstacle are generated in response to the detection of the ultrasonic wave reflected from the obstacle, so that the relative positions of the automobile and the obstacle, are indicated two-dimensionally in accordance with the pulse signal.
REFERENCES:
patent: 3226673 (1965-12-01), Cudworth
patent: 3928839 (1975-12-01), Warner et al.
patent: 4015232 (1977-03-01), Sindle
patent: 4023178 (1977-05-01), Suyama
patent: 4240152 (1980-12-01), Duncan et al.
patent: 4260980 (1981-04-01), Bates
patent: 4349823 (1982-09-01), Tagami et al.
Ito Hajime
Kodera Masao
Ohta Hisatoshi
Yoshino Yasuhisa
Brigance Gerald L.
Nippon Soken Inc.
Toyota Jidosha Kogyo Kabushiki Kaisha
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