SU1141032A1 - Device for checking blowout of traffic light lamp filaments - Google Patents

Abstract

A DEVICE FOR CONTROLLING THE EXTINGUISHMENT OF THREADS OF A LIGHT LAMP, containing elements of the light indication, elements of NAND, through one of which and through the contacts of the signal relays, the elements of the light indication are connected to the power source; and memory blocks, characterized in that, in order to increase its reliability, it is equipped with key elements made on the thyristors, a pulse sensor made on the multivibrator, control elements made on the optocouplers whose inputs are connected to the control inputs of the key elements, and the outputs are included in the power supply circuit of the light-indicating elements, each of the key elements is included, in the power supply circuit of the traffic light lamp, one inputs of some elements AND-NOT are connected to the contacts of the signal relays, and the other inputs are connected to the output E actuating elements and the inputs of the memory units, the outputs of which are connected to one input of another AND-NO elements, the other inputs of which are connected to the pulse generator, and the outputs of one and the other AND-NO elements are connected together and connected to the elements of S light indication.

Description

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The invention relates to railway transport and is used to control the burnout of traffic light bulbs in automatic blocking systems and electrical interlocking.

A device for monitoring burn-through of a traffic light lamp is known, which contains light indication elements, NAND elements through one of which and through the contacts of signal relays, light indication elements are connected to a power source, and memory blocks 1.

A disadvantage of the known device is the lack of control of the filament of the filaments of those lamps that are not currently connected to the power source by switching elements of control of traffic lights, because the device remembers the break of the filament of the lamp that is connected until the indication is cleared and does not control the integrity of the filament in the cold state, which reduces the reliability of the device.

The purpose of the invention is to increase the reliability of the device.

The goal is achieved by the fact that the device for controlling the burnout of the threads of the traffic light lamps, containing the light indication elements, the NAND elements, through one of which and through the contacts of the signal relays, the light indication elements are connected to the power source, and the memory blocks are equipped with key elements thyristors, a pulse sensor made on a multivibrator, control elements made on optocouplers, the inputs of which are connected to the control inputs of key elements, and the outputs are included in the power supply circuit in the light indication, each of the key elements is included in the power supply circuit of the traffic light lamp, some inputs of some elements AND NOT are connected to the contacts of the alarm relays, and the other inputs are connected to the outputs of control elements and the inputs of the memory blocks whose outputs are connected to one other. elements NAND, the other inputs of which are connected to the pulse sensor, and the outputs of one and other elements are interconnected and connected to the elements of the light display.

The drawing shows a schematic diagram of the proposed device.

The device contains connected to a power source with poles 1 and 2 through one pins 3 and 4 of the signal relays (windings of the signal relays are not shown) traffic lights 5-7, connected through one AND-HE elements 8-10 with other AND contacts and 12 signal relay elements 13-15 of the light indication, memory blocks 16-18, made on triggers, control element 19 with input 19.1 and output 19.2, control element 20 with input

20.1 and output 20.2, a control element 21 with an input 21.1 and an output 21.2, made on optocouplers, key elements 22-24, made on thyristors, a sensor of 25 pulses and other elements AND NOT 26-28. At the same time, inputs 19.1, 20.1 and 21.1 of elements 19-21 are connected to control inputs of key elements 22-24, and outputs 19.2, 20.2 and 21.2 are included in the supply circuit of elements 13-15, each of elements 22-24 is included in the lamp power supply circuit. 5-7, respectively, one inputs of the AND-NE elements 8-10 are connected to the contacts 11 and 12 of the signal relays, and the other inputs are connected to the outputs 19.2, 20.2 and 21.2 of elements 19-21 and the inputs of blocks 16-18, the outputs of which are connected to one of the inputs of the elements AND-NOT 26-28, the other inputs of which are connected to the sensor 25, and the outputs of the elements AND-NOT 8-10 and the elements AND-NOT 26-28 are interconnected connected to elements 13-15, respectively.

The device works as follows.

The presented scheme corresponds to the state of the device when elements interact to turn on one traffic light, for example, lamp 5. The operation of other lamps is similar.

When connecting power from the poles

I and 2 of the power supply in the control input of the key element 22 (23, 24) through the input 19.1 (20.1, 21.1) of the control element 19 (20, 21) current flows, opening the key element 22 (23, 24). Through contacts 3 and 4 of the signal relays closed at the appropriate position and an open key element 22 (23, 24) lamp 5 (6, 7) is energized. Through the exit

19.2 (20.2, 21.2) of the control element 19 (20, 21) the signal passes to another input of the element IS-NE 8 (9, 10) (to the first input of which the signal passes through the contacts

II and 12 signal relays) and block 16 input (17, 18). The signal from the output element AND-NOT 8 (9, 10) is supplied to the element 13 (14, 15) of the light display. Element 13 (14, 15) shines continuously, which means the inclusion of a traffic light lamp 5 (6, 7) in the work and its serviceability. When the lamp 5 is in good condition and is switched on, a signal arrives at the input of the block 16 through the output 19.2 of the control element 19. This signal is converted by the output unit 16 into an electrical signal, resulting in the absence of a signal at the output of the NAND 26 element.

In the event of a malfunction (break) of the filament circuit of the lamp 6 (7), not included in the operation, the power supply circuit of the control input of the key element 23 (24) is violated, the current through the input 20.1 of the control element does not leak. Therefore, the signal from the output 20.2 (21.2) of element 20 (21) arriving at

the input of block 17 (18), at the output of the latter, is converted into a signal, which, in conjunction with the signal from sensor 25, opens an AND-NE 27 element (28). A signal from its output causes the light indication element 14 (15) to flash, indicating that the corresponding lamp 6 (7) has failed. At this time, there is no continuous signal from the output of the NAND 9 (10) element, since no signal is received at its one input.

Thus, the invention provides continuous monitoring of the health of the threads of traffic lights in both cold and hot conditions, which increases the reliability of the device.

Claims (1)

DEVICE FOR CONTINUOUS BURNING OF THREADS OF LAMPS OF A LIGHT TRAFFIC, containing elements of light indication, elements AND — NOT, through one of which and through contacts of signal relays the elements of light indication are connected to a power source; and memory blocks, characterized in that, in order to increase its reliability, it is equipped with key elements made on thyristors, a pulse sensor made on a multivibrator, control elements made on optocouplers, the inputs of which are connected to the control inputs of key elements, and the outputs are included in the power supply circuit of the light indication elements, each of the key elements is included., in the power supply circuit of a traffic light, some inputs of some elements AND are NOT connected to the contacts of the signal relays, and other inputs to the outputs directs elements and the inputs of the memory blocks, the outputs of which are connected to one input of another AND-NO elements, the other inputs of which are connected to the pulse generator, and the outputs of one and the other AND-NO elements are connected together and connected to the elements of light indication.