Transmitter and receiver device for road vehicle to recognise emergency vehicle warning signals - has receiver arranged such that indication signal is generated only above predetermined reception power

摘要

The transmitter/receiver system is provided to enable road vehicle drivers to recognise emergency vehicle warning signals. The receiving vehicles have a radio wave receiving device. The transmission device is coupled to a warning signal system of an emergency vehicle such that the transmitter sends out one or more radio wave signals when the warning signal system is switched on. The receiver has a reception part which converts the transmitted signals into indication signals which indicate the warning signal to the vehicle driver. The reception device is set up such that the indication signals are only generated above a predetermined reception power.