CN2104164U

CN2104164U - Switches, entrance and turnout taking examining display unit

Info

Publication number: CN2104164U
Application number: CN 91223083
Authority: CN
Inventors: 谈大培
Original assignee: ZHENJIANG STATION NANJING RAIL
Current assignee: ZHENJIANG STATION NANJING RAIL
Priority date: 1991-08-10
Filing date: 1991-08-10
Publication date: 1992-05-13

Abstract

The utility model belongs to a device which can ensure safe rail traffic and is suitable for various switch and interlock modes. The utility model is composed of a switch position sensor, an axle counter sensor, a photoelectric coupler, a micro-computer, an analogue display, etc. The device adopts a non-contact direct measurement mode to detect the position of every switch and to carry out the axle counting for tracks of which a train enters and exits. Signals are input into the micro-computer to be distinguished, progressed and displayed in order to avoid the contacting fallibility of the present contact detecting device and the inexpressive run caused by faults, examination, repair or flood. So the utility model has the obvious function for ensuring the driving safety.

Description

Switches, entrance and turnout taking examining display unit

The utility model belongs to a kind of equipment that guarantees railway traffic safety, particularly is used for the detection telltale of track switch, route and track occupied, is applicable to various turn-out tracks and interlock method.

The general contact detecting device that links to each other with turn-out track that adopts in known switch location detects.Except that the contact is unreliable, also to drive the contact through complicated leverage transmission device, in case just losing the position, the leverage fault represents; And that route is represented is just more fragile, in case fault or manual handling track switch promptly lose expression, makes train reception and departure not have the expression operation, threatens to safety; Track circuit on the rail realizes by being located at often in the expression of track occupied, and is easier to be former thereby lose expression or mistake expression because of corrosion, floods etc. except complex structure, also causes very big threat to traffic safety.

The purpose of this utility model provides a kind of stable and reliable for performance, Installation and Debugging detect telltale easily, no matter the what state of switch and track circuit, no matter the also what state of interlocking equipment, it can both with switch location, route and track occupied things to know show, with the misrepresentation of avoiding losing expression or causing because of maintainer's error because of breakdown of equipment.

The utility model is achieved in that by switch location sensor, axle count sensor, photoelectrical coupler and microcomputer, conformable display etc. to be formed.Switch location sensor, axle count sensor are a kind of noncontacting proximity sensor, are made up of oscillator, amplifier, threshold circuit and output circuit; Photoelectrical coupler is made up of light-emitting diode and photo-transistor; The L that conformable display is made up of data driver, address decoding actuator and some light-emitting diodes ₁～L ₁₆Compositions such as LED display matrix and MPU interface device 8279.

Below in conjunction with accompanying drawing a specific embodiment of the present utility model is explained in detail.

Fig. 1 is a block diagram of the present utility model;

Fig. 2 is the block diagram of microcomputer and conformable display;

Fig. 3 is the schematic circuit diagram of noncontacting proximity sensor and photoelectrical coupler;

Fig. 4 is the schematic circuit diagram of microcomputer and conformable display.

The utility model is made up of switch location sensor, axle count sensor, photoelectrical coupler and microcomputer, conformable display etc.Switch location sensor and axle count sensor are a kind of noncontacting proximity sensor, are made up of oscillator, amplifier, threshold circuit and output circuit etc., here it is integrated induction near switch integrated circuit TCA205 to have used a monolithic, no matter be that switch location sensor or axle count sensor all are to use in pairs, so not only making to detect has very high reliability.Also can use the multi-valued logic principle, make this device have 2 ²=4 signal conditions are breakdown signal when two signals identical (i.e. " 0 ", " 0 " or " 1 ", " 1 "); (otherwise i.e. " 0 ", " 1 " or " 1 ", " 0 ") is correct signal.Photoelectrical coupler is made up of light-emitting diode D and photo-transistor BG, no direct line between them, but connect by light.Because sensor and microcomputer have adopted separate power supply respectively, thereby they have the isolation on electric, can prevent the phase mutual interference effectively.The L that conformable display is made up of data driver, address decoder actuator and some light-emitting diodes ₁～L ₁₆Compositions such as LED display matrix and MPU interface device 8279.Data driver is by transistor array circuit ULN2003A and aerotron BG ₁～BG ₈Form, the address decoder actuator is made up of through decoder, address driving circuit etc. the address scan circuit in 8279, delivers to OUTA by the data that 8279 interior RAM will refresh ₀～A ₃, OUTB ₀～B ₃On, output is connected the anode of all LED through data driver, and then per eight of the other end of LED is formed one group and is linked together, and by aerotron control, this aerotron is then by 8279 scan address (SL ₀～SL ₃) drive through decoder circuit 74LS154, transistor array circuit ULN2003A.8279 scan addresses and refresh corresponding data ceaselessly, the LED matrix is along with scanning and refresh and lighted in turn, and microcomputer only just need be visited to telltale when needs are rewritten in 8279 the RAM content.

When detecting track switch, route situation, the vibration of noncontacting proximity sensor produces an alternating magnetic field on the driving surface of sensor place, convert oscillator signal to the binary switch signal through amplifier, output " 0 ", at this moment the light-emitting diode D conducting of photoelectrical coupler is luminous, make adjacent photo-transistor BG receiving optical signals and conducting, the collecting electrode output low level is sent signal into microcomputer through buffer circuits 74LS244; When tongue or connecting rod T-magnet and train wheel wheel rim proximity transducer place driving surface, the eddy current of generation has absorbed the energy of vibration, and vibration is weakened until stopping, TCA205 exports " 1 ", and D ends, and BG also ends, collecting electrode output high level is sent signal into computing machine through 74LS244.Computing machine carries out track switch deciding, antiposition and failure judgment to the signal of input, and send conformable display to show judged result.

The axle count sensor that after train enters the station, is arranged on station track one end each wheel by the time all produce a pulse, by photoelectrical coupler signal is sent into microcomputer and counts axle; The axle count sensor that is arranged on the other end when train rolls this station track away from produces pulse again, sends into computing machine by photoelectrical coupler and counts axle.Just think that this station track is emptied when being kept to zero mutually, otherwise just think to take that the situation that simultaneously this taken is delivered to conformable display and shown as two number of axle.

It is to be placed with fare and to connect faulty operations such as car and departure route mal and report to the police in order to split that the utility model organically combines track switch route and track occupied.

The utility model has autonomous system of one's own, and the sensor integral sealing has the characteristics such as vibration resistance, corrosion-resistant, waterproof. Complete machine has that working stability is reliable, and antijamming capability is strong, and interface is simple, and is easy for installation, for guaranteeing that traffic safety has obvious effect.

Claims

1, a kind of track switch, route and track occupied detect telltale, it is characterized in that it is made up of switch location sensor, axle count sensor, photoelectrical coupler and microcomputer, conformable display etc.:

A, switch location sensor and axle count sensor are a kind of noncontacting proximity sensor, output by oscillator connects amplifier, amplifier is connected with threshold circuit again, threshold circuit is connected with the light-emitting diode D of photoelectrical coupler through output circuit, and the output of Ou He photo-transistor BG is connected with buffer circuits with it;

B, conformable display are formed the OUTA of micro controller system 8279 by data driver, address decoding actuator, LED display matrix and MPU interface device etc. ₀～A ₃, 0UTB ₀～B ₃The end be connected with transistor array circuit ULN2003A, ULN2003A again with aerotron BG ₁～BG ₈Connect the SL of micro controller system 8279 ₀～SL ₃End is connected with decoder circuit 74LS154,74LS154 is connected with transistor array circuit ULN2003A again, the output of ULN2003A is connected with all LED unit anodes of LED display matrix, the other end of all LED unit is then formed one group by several light-emitting diodes and is linked together, by an aerotron control.

2, detection telltale according to claim 1 no matter it is characterized in that it being switch location sensor or axle count sensor, all is to use in pairs.

3, detection telltale according to claim 1 is characterized in that the LED display matrix has L ₁～L ₁₆16 LED unit.