Car collision prevention apparatus and method using dual process

Communications: electrical – Land vehicle alarms or indicators – Of relative distance from an obstacle

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180169, 340903, 342 71, 364461, 367112, 367909, B60Q 100

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active

055944132

ABSTRACT:
Car collision prevention apparatus and method comprises a slave processor for transmitting and receiving a laser beam or an ultrasonic wave signal to extract distance information between a car and a car in front, and a master processor for comparing the extracted distance information from the slave processor with a safety distance between the car and the front car based on a car speed and performing car accelerating or decelerating and alarm functions in accordance with the compared result. The slave processor comprises a long-distance sensing laser sensor and a short-distance sensing ultrasonic wave sensor disposed in a front side of the car, the long-distance sensing laser sensor consisting of a laser trigger circuit, a laser transmitter and a laser receiver, the short-distance sensing ultrasonic wave sensor consisting of an ultrasonic wave trigger circuit, an ultrasonic wave transmitter and an ultrasonic wave receiver. The long-distance sensing laser sensor is driven in long-distance mode of the car in which the car speed is higher than a reference speed. The short-distance sensing ultrasonic wave sensor is driven in short-distance mode of the car in which the car speed is lower than the reference speed.

REFERENCES:
patent: 3952301 (1976-04-01), Sorkin
patent: 4632543 (1986-12-01), Endo
patent: 5165497 (1992-11-01), Chi
patent: 5173881 (1992-12-01), Sindle
patent: 5189619 (1993-02-01), Adachi et al.
patent: 5215159 (1993-06-01), Nishida
patent: 5396426 (1995-03-01), Hibino et al.

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