Inter-vehicle communication apparatus by means of infrared rays

Details Inter-vehicle communication apparatus by means of infrared rays Inter-vehicle communication apparatus by means of infrared rays

1991-03-08

1992-06-30

Ng, Jin F.

Communications: electrical

External condition vehicle-mounted indicator or alarm

Transmitter in another vehicle

340901, 455 89, G08G 100

Patent

active

051267357

ABSTRACT:
Inter-vehicle communication apparatus employing infrared beams. Two emitter-receiver (ER) devices are provided to be mounted on each vehicle. Each ER has codifier and a decoder. On a first vehicle the codifier is operated responsive to the actuation of a horn button to provide a coded signal which is emitted as a forward warning beam by the emitter section of the one ER which is mounted on the front of the first vehicle. One ER is mounted on the rear of the second vehicle which also is provided with a codifier and decoder, and a sensor for receiving a forward warning beam emitted from the one ER of the first vehicle. When a warning beam is received by the sensor of the second vehicle, it is decoded by the associated decoder and actuates an acoustic warning device within the second vehicle to warn the driver. The warning beam received by the rear-mounted ER of the second vehicle is also used to produce an acknowledgement signal which is emitted as a backward beam toward the first vehicle. The front-mounted ER of the first vehicle is also provided with a sensor to receive the acknowledgement beam which, when received within a predetermined time, prevents the horn of the first vehicle from being operated. Preferably, the ER devices are implemented with diode emitters and photo-diode sensors and associated circuits receivers.

REFERENCES:
patent: 4706086 (1987-11-01), Panizza
"Want to Pass? Blow Your Radio", The Washington Daily News, Feb. 11, 1972, p. 53.

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