SU867723A1 - Device for monitoring faults of vehicle signal lights - Google Patents

Description

(54) DEVICE FOR MONITORING THE CORRECTNESS OF THE TRANSMITTER SIGNAL LAMPS

,

The invention relates to electrical equipment for transport vehicles and can be used for the maintenance of signal lamps, and in particular, indicator lamps (5t. Cars.

It is known a device for monitoring the variance of signal lamps of vehicles, containing a tdK | 1 sensor, made on a transformer, from the windings of which is connected to the power supply circuit of the signal lamp, after a fuse, with a pulse generator, and a third with an indicator device.

A disadvantage of the known device is that its operation requires the presence of a pulse generator.

The closest to the proposed invention in technical terms (th cymHocfH and the achieved result is a device for monitoring the health of the signaling of 1x vehicle lamps, which contains a current sensor,

The transformer, the primary winding of which is connected in series with the contacts of the chopper in the power supply circuit of signal lamps, and the secondary one is connected to a capacitor, and the other to the diode anode, thyristor and control lamp, included between the positive power source and the thyristor anode The control electrode of which is connected to one of the terminals of the load resistor, the other terminal of which is connected to the negative busbar of the power source 2j.

The disadvantage of this device

Claims (2)

IS is that with its help, the lamp health cannot be monitored if the number of simultaneously connected lamps is odd (whether the car has a trailer or a side repeater), including in Ie the lamps have different resistance, and also if Lamps are connected according to a regular circuit. In addition, in the known solutions, the monitoring is carried out at the moment of switching on cold lamps, i.e. when starting currents flow through them 3–6 times greater than the working currents, and the difference in the starting currents for different pairs of lamps fluctuates in the range exceeding the value of the operating current, which makes the cxiajej control unreliable. The purpose of the invention is to increase the reliability of the control. This goal is achieved in that the device is provided with an auxiliary capacitor / and a diode connected in series with each other and in parallel with the breaker contacts, the common point of which is connected to the thyristor cathode, and an additional resistor connected between the second in the secondary winding of the transformer a and the terminals of the terminal, The first capacitor is connected in parallel with the load resistor, the first terminal of which is connected to the cathode of the first diode. The drawing shows the principle on the electrical circuit of the device for monitoring the health of the signal lights of the vehicle. The device contains a signal lamp 1-4 connected in series with a switch 5 transformer 6 with windings 7 and 8, a current sensor, diodes 9 and 10, pins 11 of an interrupter, capacitors 12 and 13, resistors 14 and 15, thyristor 16 and control lamp 17. Lamps 1–4 are connected by one output to the negative power supply busbar, Ey, and the second through the switch 5 with one of the winding terminals 7 of the transformer 6, the second winding terminal 7 is connected via the contacts 11 of the chopper to the positive power supply busbar E | and through diode 9 - with con The sensor 12 and the cathode of the thyristor 16. The secondary winding 8 of the transformer 6 is connected to the negative power supply bus by one terminal, and the second output through the resistor 14 to the terminal, to the clock 11 of the chopper, through the diode .10 to the control electrode 16 A load resistor 15 and a capacitor 13, connected in parallel, are connected to the negative bus of the supply source. The anode of the thyristor 16 through the lamp 17 is connected to a positive secret power source. In the middle position of the switch 5, the lamps 1 and 2, .. 3 and 4 are disconnected from the power source, the contacts of the II interrupter are open, the thyristor 16 is pushed out, the lamp I 7 is disconnected. The device works as follows. Lamps 1 and 2 or 3 and 4 are switched on with switch 5 and closed contact 11 switch; closed contacts 11 are bridged diode. 9, the thyristor 16, the lamp 17 and the capacitor 12, and the false operation of the control device from the starting currents of the cold lamps and external fields during the period of the mount lamp is excluded. During the opening of the contacts 11 of the chopper, the capacitor 12 is charged through diode 9, Switch 5 and lamps 1 and 2 or 3 and 4j the current of charge of the capacitor flows through the transformer winding 7, changes the resultant magnetic flux in the core, emerges in the winding 8 pulse the amplitude and polarity of which is determined by the equivalent resistance of the included lamps and the reference level set by the resistor 14. A voltage pulse of a given polarity is released by the diode 10 and is applied to the control electrode of the thyristor 16, controlling Hhfpulsa conductive amplitude. If the equivalent resistance of the monitored lamps, and, consequently, the pulse amplitude corresponds to the specified, then the thyristor 16 and the lamp 17 are turned on. If one or more warning lamps fail, the pulse amplitude is insufficient to turn on the thyristor 16 and the lamp 17. The failure control of the vehicle lamps occurs when contact opening 11 interrupter, i.e. previously switched on lamps are monitored, which increases reliability and noise immunity of the cxeMii control. The tray effect achieved with the aid of the device proposed is that the device allows controlling the switchable via a single wire. n a) an even and an odd number of parallel-connected lamps; The condition of the lamps is monitored at the moment when the lamps are turned off earlier, the effect of starting currents of the cold lamps is eliminated, and the effect of the spread of pa6o4jrx lamp currents is reduced, which increases the reliability and noise immunity of the control circuit. The device can find application on any type of transport, as well as in systems where it is necessary to monitor the health of periodically connected loads. The invention of the device for monitoring the operability of signal lamps of the transport cpff, contains a current sensor made on a transformer, the primary winding of which is connected in conjunction with the breaker contacts in the power supply circuit of the signal lamps and the secondary one is connected to a capacitor, the other is a C diode, a thyristor and a test lamp connected between the positive power source bus and the thyristor anode, the control electrode 3 of which is connected to one of the terminals of the load resistor, the other is connected to It is costly connected to the negative power supply bus, so that, in order to increase the reliability of control, it is equipped with an additional capacitor and a diode connected in series with each other and in parallel with the breaker contacts, the common point of which is connected to the cathode thyristor, and an additional-chip resistor connected between the second output of the secondary winding of the transformer and the chopper coitacts, the first capacitor connected in parallel with the load resistor, the first output of which is connected n with the cathode of the first diode. Sources of information taken into account during the examination 1. For France of France V 2274 cl. G 08 B 5/36. (at 60 Q 1/04) dated 13.02.76. 2. US patent ff 3532928, cl. 315-83, 6.f0.70 (prototype).  Jj2 -Y ff /;