On board electronic anti-collision device for a vehicle.

摘要

The invention relates to an electronic device installed on board a vehicle for transmission of data to a vehicle which follows it and for reception of data originating from a vehicle which precedes it. It comprises: . a timing analyzer (8) adapted to detect a possible deceleration of the vehicle on the basis of the speed which is communicated to it by an appropriate sensor (12) and, in the case of exceeding a certain threshold, send a corresponding signal to a radio transmitter (1) which transmits a deceleration signal via a directional antenna (3) placed on the rear of the vehicle, and . a radio receiver (2) adapted to receive, via a directional antenna (4) placed on the front of the vehicle, such a deceleration signal transmitted by a preceding vehicle and to transmit it to an electronic box (B) which transmits, in case of reception of such a signal, a visual and/or audible alarm in the passenger compartment of the vehicle, the said transmitter (1) and receiver (2) belonging to the self same equipment, which comprises a frequency synthesizer oscillator (14) adapted to the use of several chosen frequencies as a function of the direction of flow and of the path taken by the vehicle. <IMAGE>