DE19703340A1 - Electronic interrupting system for car radio - Google Patents

Abstract

The system includes a transmitter in each possible emergency vehicle, which is activated by the switching-on of the siren of the rescue vehicle. Each car radio has a receiver for the electromagnetic waves transmitted. On reception of a preset frequency, the receiver interrupts the connection between the loudspeaker and car radio via a relay. Simultaneously a signal lamp is switched on by the car radio. The sound interruption is concluded as soon as the transmitted electromagnetic waves are outside a predetermined reception range. The connection may alternatively be restored after a specific time period. The signal lamp is switched-off when the sound connection is restored.

Description

The invention relates to an electronic system, which Receiving a frequency switches off the sound of the car radio and a signal lamp lights up.

Description of the prior art

When developing my invention, I’m modern, commercially available car radios.

It is known from Philips 22DC594 / 62B that Control joysticks on the steering wheel for more safety when operating the Provide radios for people taking part in traffic because the Driver no longer distracted by pressing countless buttons becomes. It is also known that the traffic and RDS the Can inform drivers about construction sites or danger spots.

Disadvantages of the prior art

However, in the prior art described above, it is not possible to tell the driver about ambulances, fire departments or inform other vehicles with a special signal.

With a high volume of the car radio it is usually impossible the approximate z. B. perceive ambulance.

The consequence is delayed reaction or clearing of the street for Emergency vehicles, because at high volume of the car radio Martinshorn is easy to miss.

Object of the invention

The object of the invention is to operate a Car radios interrupt the sound as soon as a warning signal is given Ambulance sounds at a certain distance.

Furthermore, a sound should sound when the warning signal (Martinshorn) sounds Signal lamp illuminate, which informs the driver about the approaching one Optically informed vehicle with a special signal.  

Solution of the task

The task of interrupting the sound and switching on the signal is solved according to the invention in that each ambulance Transmitter of electromagnetic waves is installed, which at Operating the warning signal (Martinshorn) on a special Frequency emits electromagnetic waves.

A receiver of the transmitter is inserted into each car radio Receiving the sound of the car radio at this particular frequency interrupts and by a flashing signal lamp the symbolizing approaching ambulance.

The transmitter of the ambulance comes with a limited range equipped to achieve a certain radius of action.

Advantage of the invention

The invention has the following advantage: the driver of a car no longer overhears when operating the car radio with high Volume the warning signal (Martinshorn) and can therefore be used for needed help clear the road in time.

Even if the car radio is switched off, the ambulance will go through the illuminated signal lamp symbolizes.  

Description of exemplary embodiments

Embodiments of the invention are shown in the figures and are described in more detail below.

Fig. 1 circuit diagram transmitter in the ambulance

Fig. 2 circuit diagram receiver on the car radio.

Fig. 1 shows that the transmitter of the electromagnetic waves operates as soon as the circuit of the Martinshorn and the transmitter is closed.

Fig. 2 shows the structure of a car radio and the receiver. The car radio is connected to the mains by its own circuit. The receiver of the transmitted electromagnetic waves is independent of the car radio. The receiver's circuit is closed as soon as the vehicle ignition is switched on.

The receiver switches a relay when it is on a special Frequency receives the electromagnetic waves which through an ambulance was sent out.

The relay disconnects the speakers from the Car radio and also switches on the signal lamp.

The speaker connection is canceled when the receiver no longer has electromagnetic waves of frequency receives, the signal lamp also goes out.

Claims (3)

1. System for switching off the sound of car radios when approaching ambulances, fire services or other blue light vehicles.
A signal lamp is switched on while the radio is interrupted.
The prior art used in this invention is car radios which have traffic radio, RDS and control joystick.
The system is characterized in that each ambulance is fitted with a transmitter of electromagnetic waves, which emits electromagnetic waves when the warning signal (Martin's horn) sounds.
A receiver of these waves (specific frequency) is attached to each car radio, which interrupts the connection of the loudspeakers to the car radio via a relay when the electromagnetic waves are received and simultaneously switches on a signal lamp. Depending on the nature of the relays used, the interruption is canceled as soon as the electromagnetic waves are no longer in the detection range of the receiver.
It is also possible with various components to re-establish the connection after a certain period of time.
The signal lamp goes out as soon as the loudspeaker and car radio are connected again, i.e. the relay is in the initial position. 2. It should also be possible to switch the transmitter on as soon as the blue light is activated. This could inform the driver about ambulances during night operations, since they drive without a siren at night.
It is also not necessary to switch on the radio, since the signal lamp is switched on when the electromagnetic waves are received. 3. If the situation demands, the performance of the Transmitter can be changed, because in the city a shorter one Effective circle is needed as z. B. on the highway in a traffic jam.