RU1807953C - Vehicle signalling device - Google Patents

Abstract

The device relates to electrical accessories. driving of vehicles and is intended for signaling the location of a car standing on the side of the roadway in the dark. SUMMARY OF THE INVENTION: the device comprises a photosensor 1 with an output amplifier 2. One of the inputs of the response signal generator 3 is connected to the reference voltage source 4, and the other input, after a time, the driving element 5 is connected to the output of the amplifier 2. The sensitivity adjustment unit 6 is included in the power supply circuit of the photosensor 1, and the input of the executive unit 7 is connected to the output of the driver 3 The device reliably signals when it is illuminated by the headlights of oncoming vehicles. 6-1-2-4-5-3-7. 1 ill.

Description

The invention relates to the electrical equipment of vehicles, mainly passenger cars, and is intended for signaling the location of a car standing on the side of the roadway in the dark.

The purpose of the invention is to increase reliability.

The drawing shows a circuit diagram of the device.

The device comprises a photosensor, 1 with a current amplifier 2, a driver 3 of a trip signal, one of the inputs of which is connected to a reference voltage source 4. Time, the driving element 5 is connected between the output of the amplifier 2 and the other input of the driver 3, The sensitivity adjustment unit 6 is included in the power supply circuit of the photosensor 1. The input of the executive unit 7 is connected to the output of the driver 3,

The amplifier 2 is implemented on the transistor 8, the resistors 9.10 and the capacitor 11, included in the emitter follower circuit. The driver 3 is implemented on an operational amplifier 12, a resistor 13, and a resistor 14 and a capacitor 15 included in the feedback circuit.

The reference voltage source 4 is implemented on a voltage divider containing resistors 16, 17. At the time, the driving element 5 comprises a resistor 18 and a capacitor 19, and the sensitivity adjustment unit 6 is made on a voltage divider containing resistors 20, 21,

The actuating unit 7 is made on transistors 22, 23, resistors 24, 25, The load 26 of the actuating unit 7 may be a special light source when the device is used in stand-alone mode, or regular vehicle side lights, the power circuit of which is switched by a relay. In this case, the load 26 is the relay winding with a protective diode 27. The device also contains a diode 28 and a capacitor 29, which is designed to prevent incorrect connection of the power source and smooth out possible surges in the supply voltage.

The device operates as follows.

In the initial state of the device in the dark and the photosensor 1 is not illuminated, the capacitor 19 is charged and no current flows through the resistor 18, and insufficient voltage is generated at the output of the operational amplifier 12 to trigger unit 7, as a result of which there is no signaling.

When a standing vehicle is illuminated with the headlights of an approaching car, the photosensor 1 is illuminated and its resistance decreases sharply. The voltage at the output of the current amplifier 2 increases, as a result of which the capacitor 19 starts to recharge on the circuit: + capacitor 19 - resistor 18 - resistor 17 - resistor 10- - capacitor 19. The flow of the overcharge current creates a voltage drop on resistor 18, positive the pole of which is applied to the input of the operational amplifier 12, at the output of which and at the output of the driver 3 there is a positive voltage close to the supply voltage, which opens the actuator unit 7 and the signal element (load 26) is turned on, through which The current begins to flow. AT

depending on the fulfillment of load 26, either the lights come on or a relay is activated, including the side lights. A vehicle is alerted when there is a vehicle in front

a car. The signal duration of the driver 3 is set within 3 ... 15 seconds. After recharging the capacitor 19, the current through the resistor 18 is stopped. Shaper output 3 voltage

becomes close to zero, the execution unit 7 is turned off (the output of the light signal stops). In this position, the device is at all times while the standing vehicle is lit. At

cessation of illumination (for example, when a vehicle passes a standing car), the resistance of photosensor 1 increases sharply, the voltage at the output of amplifier 3 starts to decrease,

as a result, reverse recharging of the capacitor 19 begins over the above recharge circuit. The direction of the recharge current, in this case, will be opposite to the previous one, while a voltage appears on the resistor 18, the negative pole of which is applied to the output of the operational amplifier 12, the output of which stores a voltage close to zero. After the recharge is completed, the device returns to its original state.

The duration of the generated light signal is determined by the parameters of the recharge circuit of the capacitor 19 - capacity

capacitor 19 and resistances of resistors 10, 17, 18.

Claims (1)

SUMMARY OF THE INVENTION A signal device for a vehicle comprising a photosensor with an output current amplifier, form-reliability, an adjustment unit, a response signal detector, one of which is included in the photo-input power supply circuit of which is connected to a source and the current amplifier output is connected reference voltage, time setting through time setting element to another element, adjustment block sensitive to the input of the signal driver of the signal and the executive unit, I distinguish 5, the output of which is connected to the input only with the fact that. in order to increase the fill block,