CN103640597B - A kind of two get two continuous exchange of track circuit and method of inspection thereof - Google Patents
A kind of two get two continuous exchange of track circuit and method of inspection thereof Download PDFInfo
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- CN103640597B CN103640597B CN201310631412.0A CN201310631412A CN103640597B CN 103640597 B CN103640597 B CN 103640597B CN 201310631412 A CN201310631412 A CN 201310631412A CN 103640597 B CN103640597 B CN 103640597B
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Abstract
The invention provides continuous exchange of track circuit and method of inspection thereof that a kind of two get two, this track circuit comprises impedance adjustment circuit, the first isolator, the second isolator, the first voltage-regulating circuit, the second voltage-regulating circuit, the first AD converter, the second AD converter, a CPU, the 2nd CPU and the 3rd isolator.The method of inspection that the present invention also provides a kind of two to get the continuous exchange of track circuit of two.Impedance adjustment circuit of the present invention simulates 480 traditional relay impedance characteristics, ensure that the compatibility with traditional continuous exchange of track circuit; Adopt two to get two structures, there are two independences and the arithmetic channel of isolation, by the analysis to track voltage sample result, improve the detection level of shunting sensitivity; The present invention can replace 480 traditional relays, effectively improves lightning protection and the safety of track circuit.
Description
Technical field
The present invention relates to continuous exchange of track circuit technical field, specifically a kind of two get two continuous exchange of track circuit and method of inspection thereof.
Background technology
Whether track circuit is the circuit formed for conductor with the rail of a section of railway track circuit, taken for automatic, continuous detecting this section of circuit by rolling stock, also for control signal device or switching device, to ensure the equipment of traffic safety.Within the scope of track circuit, without wheel, regulated state of a track circuit is called to state when taking, has wheel state when taking to be called to the shunted condition of track circuit.
Traditional continuous exchange of track circuit adopts 480 track circuits, as shown in Figure 1,480 track circuits generally adopt main linely connected power sup ply mode, namely a pair or two pairs of supply mains (use cable conductor) are drawn by signal tower, feed end track supply transformer BG1-50 to each track circuit section powers, track relay GJ adopts JZXC-480 type relay, is located in signal tower, is connected by cable with cable box (relay transformer) BZ4 of receiving end.This 480 track circuit also exists the shortcomings such as shunting sensitivity is low, lightning protection properties is poor, and can not avoid common mode interference, have impact on the safety of computer interlock system and train operation.
Summary of the invention
The object of the present invention is to provide a kind of two get two continuous exchange of track circuit and method of inspection thereof, to solve problems of the prior art.
Technical scheme of the present invention is:
Two get two a continuous exchange of track circuit, comprising: impedance adjustment circuit, for simulating 480 traditional relay impedance characteristics; And the first arithmetic element be connected with the mouth of described impedance adjustment circuit respectively and the second arithmetic element; Described first arithmetic element comprises the first isolator, the first voltage-regulating circuit, the first AD converter and a CPU; Described second arithmetic element comprises the second isolator, the second voltage-regulating circuit, the second AD converter and the 2nd CPU; The mouth of described impedance adjustment circuit is connected with the input end of the first AD converter with a CPU by the first isolator, the first voltage-regulating circuit successively, is connected successively by the second isolator, the second voltage-regulating circuit with the input end of the second AD converter with the 2nd CPU; A described CPU is connected by the 3rd isolator alternately with the 2nd CPU.
Described two get two continuous exchange of track circuit, described first arithmetic element also comprises the first self-checking circuit, and described first self-checking circuit is used for prescinding the input of the first voltage-regulating circuit under the control of a CPU; Described second arithmetic element also comprises the second self-checking circuit, and described second self-checking circuit is used for the input of prescinding the second voltage-regulating circuit under the control of the 2nd CPU.
Described two get two continuous exchange of track circuit, described first isolator is specially current mode isolating transformer, and described second isolator is specially voltage-type isolating transformer.
Described two get two continuous exchange of track circuit, described first voltage-regulating circuit and the second voltage-regulating circuit are specially two kind are identical and the integrated operational amplifier that model is different.
Described two get two continuous exchange of track circuit, described first self-checking circuit and the second self-checking circuit are specially low conduction impedance N-type metal-oxide-semiconductor.
Described two get two continuous exchange of track circuit, described 3rd isolator is specially digital isolator or optocoupler.
Described a kind of two method of inspections getting the continuous exchange of track circuit of two, comprise the following steps:
(1) railway voltage after being boosted by cable box inputs the first isolator and the second isolator by impedance adjustment circuit;
Railway voltage is transferred to the first voltage-regulating circuit in the mode of current coupling by (2) first isolators, and railway voltage is transferred to the second voltage-regulating circuit in the mode of voltage couples by the second isolator;
(3) first voltage-regulating circuits and the second voltage-regulating circuit adjust input railway voltage wherein respectively, output ripple direct current signal;
The output signal of (4) first AD converter to the first voltage-regulating circuit is sampled and is transferred to a CPU after changing, and the output signal of the second AD converter to the second voltage-regulating circuit is sampled and transferred to the 2nd CPU after changing;
(5) the one CPU and the 2nd CPU carry out computing to the railway voltage signal received separately respectively, if the numerical value of railway voltage is higher than the threshold value preset, then be judged to be orbit adjusting state, if the numerical value of railway voltage is lower than the threshold value preset, be then judged to be track branch state;
Respective result of determination is exchanged by the 3rd isolator and compares by (6) the one CPU and the 2nd CPU respectively, if result of determination is consistent, then result of determination is reported to interlock system, if result of determination is inconsistent, then reporting fault export orientation are surveyed safely.
Described two method of inspections getting the continuous exchange of track circuit of two, also comprise: a CPU prescinds the incoming signal of the first voltage-regulating circuit by the first self-checking circuit timing, 2nd CPU prescinds the incoming signal of the second voltage-regulating circuit by the second self-checking circuit timing, judges whether the first voltage-regulating circuit and the second voltage-regulating circuit are in normal mode of operation respectively.
As shown from the above technical solution, impedance adjustment circuit of the present invention simulates 480 traditional relay impedance characteristics, and design impedance is 480 Europe, ensure that the compatibility with traditional continuous exchange of track circuit; Adopt two to get two structures, there are two independences and the arithmetic channel of isolation, by the analysis to track voltage sample result, improve the detection level of shunting sensitivity; The present invention can replace 480 traditional relays, effectively improves lightning protection and the safety of track circuit.
Preferably, two isolators adopt current mode isolating transformer and the design of voltage-type isolating transformer respectively, improve the ability of the anti-common mode interference of circuit, also improve inter-stage isolation simultaneously.
Preferably, two voltage-regulating circuits adopt has identical function and the different integrated operational amplifier of performance, makes voltage range meet the requirement of AD converter voltage sample, improves the anti-common mode interference ability of circuit.
Preferably, by design self-checking circuit, timing can carry out self-inspection to the mode of operation of voltage-regulating circuit, improve the safety of circuit.
Accompanying drawing explanation
Fig. 1 is traditional continuous exchange of track circuit schematic diagram;
Fig. 2 is hardware configuration schematic diagram of the present invention;
Fig. 3 is schematic circuit diagram of the present invention.
Detailed description of the invention
Below, the present invention is further illustrated with specific embodiment by reference to the accompanying drawings.
As shown in Figure 2, a kind of two get two continuous exchange of track circuit, comprise impedance adjustment circuit 1, the first isolator 21, second isolator 22, first self-checking circuit 31, second self-checking circuit 32, first voltage-regulating circuit 41, second voltage-regulating circuit 42, first AD converter 51, second AD converter 52, a CPU61, the 2nd CPU62 and the 3rd isolator 7.First isolator 21, first self-checking circuit 31, first voltage-regulating circuit 41, first AD converter 51 and a CPU61 form the first arithmetic channel, second isolator 22, second self-checking circuit 32, second voltage-regulating circuit 42, second AD converter 52, the 2nd CPU62 form the second arithmetic channel, independent and isolation between two arithmetic channels.
The mouth of impedance adjustment circuit 1 is connected with the input end of the first AD converter 51 with a CPU61 by the first isolator 21, first self-checking circuit 31, first voltage-regulating circuit 41 successively, and the mouth of impedance adjustment circuit 1 is connected with the input end of the second AD converter 52 with the 2nd CPU62 by the second isolator 22, second self-checking circuit 32, second voltage-regulating circuit 42 successively.One CPU61 is connected by the 3rd isolator 7 alternately with the 2nd CPU62.First self-checking circuit 31 is arranged on the input end of the first voltage-regulating circuit 41, prescinds the input of the first voltage-regulating circuit 41 under the control of a CPU61; Second self-checking circuit 32 is arranged on the input end of the second voltage-regulating circuit 42, prescinds the input of the second voltage-regulating circuit 42 under the control of the 2nd CPU62.
Impedance adjustment circuit 1 equivalent input impedance 480 Europe, simulates traditional continuous exchange of track circuit receiving end JZXC-480 relay impedance characteristic.First isolator 21 adopts current mode isolating transformer, and the second isolator 22 adopts voltage-type isolating transformer, adopts the isolator of two kinds of different working modes can improve the ability of the anti-common mode interference of circuit.First voltage-regulating circuit 41 and the second voltage-regulating circuit 42 adopt two function are identical and the integrated operational amplifier that performance is different, the concrete op amp as different model in the similar op amps such as universal op amp, high resistance type op amp, Low Drift Temperature type op amp, high-speed operational amplifier, low-power consumption type op amp, op amp positive ending grounding, output ripple direct current signal.First self-checking circuit 31 and the second self-checking circuit 32 adopt low conduction impedance N-type metal-oxide-semiconductor.The 3rd isolator 7 exchanging data for a CPU61 and the 2nd CPU62 adopts digital isolator or optocoupler.One CPU61 and the 2nd CPU62 comprises micro controller system, micro controller system containing AD conversion, dsp processor and the dsp processor etc. containing AD conversion.
Resistance R1, R2, R3, R4 in Fig. 3 form impedance adjustment circuit 1, voltage transformer T1 and peripheral circuit thereof form the first isolator 21, voltage transformer T2 and peripheral circuit thereof form the second isolator 22, metal-oxide-semiconductor Q1 and peripheral circuit thereof form the first self-checking circuit 31, metal-oxide-semiconductor Q2 and peripheral circuit thereof form the second self-checking circuit 32, integrated operational amplifier U1 and peripheral circuit thereof form the first voltage-regulating circuit 41, and integrated operational amplifier U2 and peripheral circuit thereof form the second voltage-regulating circuit 42.
Two method of inspections getting the continuous exchange of track circuit of two, comprise the following steps:
S1, railway voltage are boosted by cable box, input the first isolator 21 and the second isolator 22 through wire fuse F1 protection by impedance adjustment circuit 1;
S2, the first isolator 21 adopt current mode isolating transformer, in the mode of current coupling, railway voltage is transferred to the first voltage-regulating circuit 41, second isolator 22 adopts voltage-type isolating transformer, in the mode of voltage couples, railway voltage is transferred to the second voltage-regulating circuit 42;
S3, the first voltage-regulating circuit 41 and the second voltage-regulating circuit 42 adopt integrated operational amplifier, adjust respectively, railway voltage is adjusted to the input voltage range of AD converter, output ripple direct current signal to input railway voltage wherein;
S4, the output signal of the first AD converter 51 to the first voltage-regulating circuit 41 are sampled and are transferred to a CPU61 after changing, and the output signal of the second AD converter 52 to the second voltage-regulating circuit 42 is sampled and transferred to the 2nd CPU62 after changing;
S5, a CPU61 and the 2nd CPU62 carry out computing to the railway voltage signal received separately respectively, if the numerical value of railway voltage is higher than the threshold value preset, then be judged to be orbit adjusting state, if the numerical value of railway voltage is lower than the threshold value preset, be then judged to be track branch state;
Respective result of determination is exchanged by the 3rd isolator 7 and compares by S6, a CPU61 and the 2nd CPU62 respectively, if result of determination is consistent, then result of determination is reported to interlock system, if result of determination is inconsistent, then reporting fault export orientation are surveyed safely;
S7, the first self-checking circuit 31 and the second self-checking circuit 32 adopt low conduction impedance N-type metal-oxide-semiconductor, one CPU61 prescinds the incoming signal of the first voltage-regulating circuit 41 by the first self-checking circuit 31 timing, 2nd CPU62 prescinds the incoming signal of the second voltage-regulating circuit 42 by the second self-checking circuit 32 timing, judge whether the first voltage-regulating circuit 41 and the second voltage-regulating circuit 42 are in normal mode of operation, ensure the reliable Detection to low pressure respectively.
The present invention adopts two to get two structures to the detection of railway voltage, and a road input railway voltage is converted to two-way and exports, deliver to two microprocessors respectively, the Arbitrary Fault pattern of any single components and parts all can not cause microprocessor export orientation hazardous side.In addition, two microprocessor CPUs to the waveform analysis of the railway voltage signal received separately relatively after, tentatively can judge the failure mode of isolator in front stage circuits, improve fault location and maintenance efficiency.For two and two or more components and parts simultaneous faults, according to EN50126 and IEC61508 standard, the failure rate calculated is to the requirement of railway security integrity levels 4 in Europe superscript, and namely this circuit meets the highest safety integrity level requirement in Europe superscript.
The components and parts failure mode of concrete consideration comprises: (1) resistance: short circuit, short circuit, resistance random variation; (2) isolating transformer: monolateral coil open circuit, I/O terminal shortcircuit, primary and secondary coil short circuit, effectively turn ratio change; (3) integrated operational amplifier: input end short circuit, input end open circuit, output parasitic concussion, inherent failure etc.; (4) electric capacity: short circuit, short circuit, capacitance random variation; (5) NMOS tube: any two intereelectrode short-circuits, arbitrarily open circuit between the two poles of the earth, turn-on voltage variation.
The above embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that those of ordinary skill in the art make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determine.
Claims (6)
1. two get two a continuous exchange of track circuit, it is characterized in that, comprising:
Impedance adjustment circuit, for simulating 480 traditional relay impedance characteristics; And the first arithmetic element be connected with the mouth of described impedance adjustment circuit respectively and the second arithmetic element;
Described first arithmetic element comprises the first isolator, the first voltage-regulating circuit, the first AD converter and a CPU;
Described second arithmetic element comprises the second isolator, the second voltage-regulating circuit, the second AD converter and the 2nd CPU;
The mouth of described impedance adjustment circuit is connected with the input end of the first AD converter with a CPU by the first isolator, the first voltage-regulating circuit successively, is connected successively by the second isolator, the second voltage-regulating circuit with the input end of the second AD converter with the 2nd CPU;
A described CPU is connected by the 3rd isolator alternately with the 2nd CPU;
Described first arithmetic element also comprises the first self-checking circuit, and described first self-checking circuit is used for the input of prescinding the first voltage-regulating circuit under the control of a CPU;
Described second arithmetic element also comprises the second self-checking circuit, and described second self-checking circuit is used for the input of prescinding the second voltage-regulating circuit under the control of the 2nd CPU.
2. according to claim 1 two get two continuous exchange of track circuit, it is characterized in that, described first isolator is specially current mode isolating transformer, and described second isolator is specially voltage-type isolating transformer.
3. according to claim 1 two get two continuous exchange of track circuit, it is characterized in that, described first voltage-regulating circuit and the second voltage-regulating circuit are specially two kind are identical and the integrated operational amplifier that model is different.
4. according to claim 1 two get two continuous exchange of track circuit, it is characterized in that, described first self-checking circuit and the second self-checking circuit are specially low conduction impedance N-type metal-oxide-semiconductor.
5. according to claim 1 two get two continuous exchange of track circuit, it is characterized in that, described 3rd isolator is specially digital isolator or optocoupler.
6. according to claim 1 a kind of two method of inspections getting the continuous exchange of track circuit of two, is characterized in that, comprise the following steps:
(1) railway voltage after being boosted by cable box inputs the first isolator and the second isolator by impedance adjustment circuit;
Railway voltage is transferred to the first voltage-regulating circuit in the mode of current coupling by (2) first isolators, and railway voltage is transferred to the second voltage-regulating circuit in the mode of voltage couples by the second isolator;
(3) first voltage-regulating circuits and the second voltage-regulating circuit adjust input railway voltage wherein respectively, output ripple direct current signal;
The output signal of (4) first AD converter to the first voltage-regulating circuit is sampled and is transferred to a CPU after changing, and the output signal of the second AD converter to the second voltage-regulating circuit is sampled and transferred to the 2nd CPU after changing;
(5) the one CPU and the 2nd CPU carry out computing to the railway voltage signal received separately respectively, if the numerical value of railway voltage is higher than the threshold value preset, then be judged to be orbit adjusting state, if the numerical value of railway voltage is lower than the threshold value preset, be then judged to be track branch state;
Respective result of determination is exchanged by the 3rd isolator and compares by (6) the one CPU and the 2nd CPU respectively, if result of determination is consistent, then result of determination is reported to interlock system, if result of determination is inconsistent, then reporting fault export orientation are surveyed safely;
Also comprise: a CPU prescinds the incoming signal of the first voltage-regulating circuit by the first self-checking circuit timing, 2nd CPU prescinds the incoming signal of the second voltage-regulating circuit by the second self-checking circuit timing, judges whether the first voltage-regulating circuit and the second voltage-regulating circuit are in normal mode of operation respectively.
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| CN104467797B (en) * | 2014-12-15 | 2017-08-25 | 合肥工大高科信息科技股份有限公司 | A kind of two take the safety and gate circuit and its control method using oscillator in two circuits |
| CN109606424B (en) * | 2018-12-27 | 2020-12-18 | 合肥工业大学 | Track circuit electronic receiver |
| CN110077439B (en) * | 2019-04-02 | 2021-04-30 | 北京和利时系统工程有限公司 | Track circuit receiver and frequency shift track circuit receiver |
| CN110095978A (en) * | 2019-05-06 | 2019-08-06 | 杭州耘新科技有限公司 | One kind 2 multiplies 2 and takes 2 systems and its security diagnostics method |
| CN111751609A (en) * | 2020-06-24 | 2020-10-09 | 合肥工大高科信息科技股份有限公司 | Method and system for 50Hz track signal detection and state identification |
| CN112816772B (en) * | 2021-01-04 | 2023-03-31 | 北京全路通信信号研究设计院集团有限公司 | Safe analog voltage acquisition implementation circuit |
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