Electronic anti-collison device carried on board a vehicle

An electronic device carried on board vehicles and for transmitting information from a vehicle to a vehicle following it over a given route and for receiving information coming from a vehicle preceding it over this same route wherein there is provided:

• for transmitting information:
• a chronometric scanner adapted to detect a possible deceleration of the vehicle by comparing, at specific time intervals values of speed such that said values of speed are communicated to said scanner by a sensor and, in the event that the deceleration detected exceeds a certain threshold, to send a corresponding signal to a radio transmitter device;
• said radio transmitter device adapted to transmit a deceleration signal via a directional antenna placed at the rear of the vehicle, and
• for receiving information:
• a radio receiver device adapted to receive, via a directional antenna placed at the front of the vehicle, a deceleration signal emitted by a vehicle preceding it and to transmit said deceleration signal to an alarm circuit,
• said alarm circuit adapted to emit, in the event of receiving a deceleration signal, a visual and/or audible alarm in the passenger compartment of the vehicle,
• and the said transmitter and said receiver are connected to a frequency selector which is manually or automatically controlled to select a frequency based upon the direction of the traffic and of the route taken by the vehicle.