CN2169577Y

CN2169577Y - Alarm for the filament break of railway signal lamp

Info

Publication number: CN2169577Y
Application number: CN 93209642
Authority: CN
Inventors: 项式邦
Original assignee: Guiyang Radio Four Factory; Guiyang Railway Sub Bureau Of Chengdu Railway Administration
Current assignee: Guiyang Radio Four Factory; Guiyang Railway Sub Bureau Of Chengdu Railway Administration
Priority date: 1993-04-10
Filing date: 1993-04-10
Publication date: 1994-06-22
Anticipated expiration: 2003-04-10

Abstract

The utility model relates to an alarm for the filament break of railway signal lamp, which is composed of a sampling circuit, an alarm circuit and a concentrated alarm box, after connected in series, the sampling circuit R and D are connected with the two ends of the accessory filament in parallel, and the alarm and the concentrated alarm box are respectively composed of a separator, an asymmetric waveform detection, a time-delay integration, and voltage comparison and trigger circuit and memory circuit, sound circuit and power supply circuit and are installed in the signal room. The utility model is used for transferring filament state information according to that whether the continuous waveform of the 50Hz current which is offered to the signal lamp is symmetric, and when the main filament is perfect, no acoustooptic alarm is provided; when the main filament is broken, the RD circuit offers half-cycle additional current to carry out acoustooptic alarm.

Description

Alarm for the filament break of railway signal lamp

Railway signal lamp alarm for burnout of filaments device relates to railway signal device and warning device.

Railway signal lamp (colored lights) has adopted two filaments at present, when the main filament fracture of wire, be automatically brought to and pay the filament use, because filament has certain life-span, in order to ensure safety of railway transportation, general periodic replacement signal lamp, this just makes its pair filament bulb in working order be changed, and will cause the waste of financial resources, though someone has studied the conversion of silicon control filament and has reported to the police, be to introduce indoor warning circuit with cable from signal, but all because of poor anti jamming capability, poor reliability or equipment manufacturing cost are expensive and adopt.

The purpose of this utility model is to overcome the problems referred to above, and a kind of railway signal lamp alarm for burnout of filaments device is provided.Can exercise supervision to report to the police to the signal lamp state puts in place, has improved the reliability of signal, for signal realizes that state maintenance provides a kind of new technique device, to satisfy the needs that railway transportation is produced.

The utility model is by sampling circuit, and alarm circuit and entralizing alarm box three parts are formed.

One, sampling circuit are after the RD circuit is connected by resistance R and diode D, to be installed in parallel in signal lamp and to pay on the filament leading-out terminal.During signal lamp master silk fracture of wire, pay the filament connection and light, this circuit makes bright lamp loop current waveform positive-negative half-cycle asymmetric for bright lamp loop provides the half-wave extra current.As lamp terminal voltage U _LBe 11.4V, diode D pressure drop U _DBe 0.7V, when getting R and being 33 Ω, the bright loop of lamp positive half cycle current peak I _M+Be 3.56A, negative half-cycle current peak I _M-Be 3.1A, positive-negative half-cycle peak current difference is that 0.46A waveform dissymmetry coefficient is about 14%.

Two, alarm circuit by isolate, asymmetric waveform detects, delays time integration and voltage ratio triggers (band optocoupler and be not with optocoupler) circuit four parts formation, and in entralizing alarm box is installed on signal cabin.

R in the buffer circuit ₁, R ₂Be when preventing the short circuit of voltage transformer BL primary winding, influence the regular event of DJ.

The asymmetric waveform detecting circuit is to be made of two symmetrical fully half-wave rectifying circuits.They carry out rectification to the positive-negative half-cycle of input voltage respectively, obtain the asymmetry value of input voltage waveform between A-B.Ideally on all four at element, UAB=0 in fact, when bulb master silk is intact, V _AB≤ 0.2V, main silk is had no progeny, and bright lamp loop current positive-negative half-cycle waveform is asymmetric, U _AB〉=0.8V.

D ₅Effect be the protection voltage ratio than binary pair IC.When the major-minor filament of lamp all during fracture of wire, U _AB＞＞0.8V, D ₅Oppositely wear, make U _AB=4.5V is less than the operating voltage of IC.

Time-delay integration and voltage ratio are than the R in the flip-flop circuit ₅, C ₃Constitute the time-delay integrating circuit, it act as and absorbs the momentary impulse interference and the time-delay of reporting to the police, and the time-delay of reporting to the police is 10-20S.

IC and R ₆R ₇Constitute voltage comparator.The reference voltage V of voltage comparator ₀By R ₇Obtain with inner three the 5K electric resistance partial pressures of IC, be calculated as 0.414V ₀When R is a high level, V _S＜V ₀Binary pair output high level is as VS＞V ₀The time, binary pair upset output low level.

Annunciator output has light-coupled isolation output and directly exports two types, and when optocoupler, the A point is not communicated with among Fig. 4, and output is connected with microcomputer interface monitors.No optocoupler, the A point is communicated with and is connected with entralizing alarm box, can directly carry out sound and light alarm.

Three, entralizing alarm box is by memory circuit, and sound circuit and power supply three parts are formed.Memory circuit has a lot of roads, and all there is a light warning indicator lamp on every road, and each road circuit is just the same, can obviously indicate main silk fracture of wire lamp position.Sound circuit is controlled by OR circuit.

According to the symmetry of the 50Hz electric current continuous wave that offers signal lamp whether principle of work of the present utility model is, transmit the bulb status information by original signal lamp supply cable, pass through relevant processing of circuit again, when optocoupler is arranged, can be connected with microcomputer interface, monitor by microcomputer, can directly carry out sound and light alarm during no optocoupler, and demonstrate the position of main silk fracture of wire bulb by the indicator lamp on the entralizing alarm box.

Working process such as following, when signal lamp is bright, if main filament is intact, light filament relay work, its break is opened, and the RD circuit is inoperative.Bright lamp loop current waveform is symmetrical, after the isolation sampling, and the asymmetric output circuit no-output of annunciator, warning circuit is not worked, and acousto-optic is not reported to the police.When signal lamp master silk is had no progeny, relay discharges, the closed pair filament of connecting of its break makes lamp still bright, the RD circuit provides the half cycle extra current at this moment bright lamp loop, make its positive-negative half-cycle electric current present asymmetric state, this asymmetric waveform is after sampling is isolated, and the voltage that asymmetric detecting circuit detects makes its binary pair upset output low level greater than the reference voltage of comparator.If photoelectric coupled circuit is arranged,,, and show its disconnected bulb position of main silk if the low level of no optocoupler circuit output directly makes the sound and light alarm of entralizing alarm box just by microcomputer monitoring bulb state.

Description of drawings is as follows:

Fig. 1, be railway signal lamp filament break annunciator functional block diagram

Fig. 2, be asymmetric detecting circuit schematic diagram

Fig. 3, be that time-delay integration and voltage ratio are than the flip-flop circuit schematic diagram

Fig. 1,2,3, in, I is a sampling circuit, II is an alarm circuit, III is an entralizing alarm box.The 1st, buffer circuit, the 2nd, the asymmetric waveform detecting circuit, the 3rd, the time-delay integrating circuit, the 4th, voltage ratio is than trigger circuit, and the 5th, photoelectrical coupler, the 6th, gate circuit, the 7th, acoustics circuit, the 8th, memory circuit.R, R1-R8 are resistance, and BL is a voltage transformer, and D, D1-D4 are diodes, and C1-C4 is a chemical capacitor, and C5 is that electric capacity D5 is a stabilivolt, and IC is an integrated package.

Embodiment:

The RD circuit production is on a fritter printed panel, and R and diode D are connected in series and are installed in parallel on signal lamp paranema terminal, and R is 33-51, and the metal film resistor of 2W, D are 1N4007.

D in the asymmetric waveform detecting circuit ₁-D ₄Be 1N4002, D ₅Be 4.5V/100mA zener diode, C ₁, C ₂Be the chemical capacitor of 3.3 μ/35v, R ₃, R ₄Be RJ100K Ω 0.125W, time-delay integration and voltage ratio be than in the trigger circuit, R _5,6Be RJ * 100K Ω 0.125W, R ₇Be 1.1K Ω 0.125W, R ₈Be 390 Ω .25W, C ₃, C ₄Be 100 μ/16V, C ₅Be 0.01, IC is NE555.The utility model shell is made of plastics, volume 60 * 50 * 140mm ³True weight is 0.2Kg.

The utility model can directly indicate the lamp position and the sound and light alarm dependable performance of fracture of wire, for signal realizes that state maintenance provides new technique device, two groups of filament bulb wastes in working order have been avoided, can save a large amount of manpower and materials, cost is low, suitable enterprise produces in enormous quantities to satisfy the needs that railway transportation is produced, and can be widely used on the signal management of the railway system.

Claims

1, a kind of railway signal lamp alarm for burnout of filaments device partly is made up of sampling circuit, alarm circuit and entralizing alarm box three, it is characterized in that sampling circuit is made of the RD circuit series, being installed on the signal lamp socket pays on the terminal, warning circuit provides fracture of wire information during for main fracture of wire, alarm circuit is by isolation, asymmetric waveform detects, the time-delay integration, voltage ratio is formed than trigger circuit, entralizing alarm box partly is made up of memory circuit, acoustics circuit, power supply etc., and annunciator and entralizing alarm box are installed in the signal cabin.

2, railway signal lamp alarm for burnout of filaments device according to claim 1, the RD circuit series that it is characterized in that sampling circuit is connected in parallel on pair silk terminal, pay wire connection when logical when a main silk fracture of wire, produce asymmetric waveform and this asymmetric information is passed to annunciator in the signal cabin by the bulb powered loop.

3, railway signal lamp alarm for burnout of filaments device according to claim 1, it is characterized in that the asymmetric waveform detecting circuit in the annunciator, constitute by two symmetrical fully half-wave rectifying circuits, output has light-coupled isolation output and directly exports two types, can be connected with microcomputer interface with light-coupled isolation output and to monitor, with direct export to be connected with entralizing alarm box can directly carry out sound and light alarm.

4, railway signal lamp alarm for burnout of filaments device according to claim 1 is characterized in that entralizing alarm box is equipped with the identical memory circuit of multichannel, and every road all has the optoacoustic warning to put in place.