CN104267633A - Track circuit signal collection system and method - Google Patents
Track circuit signal collection system and method Download PDFInfo
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- CN104267633A CN104267633A CN201410453552.8A CN201410453552A CN104267633A CN 104267633 A CN104267633 A CN 104267633A CN 201410453552 A CN201410453552 A CN 201410453552A CN 104267633 A CN104267633 A CN 104267633A
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- 238000000034 method Methods 0.000 title claims description 21
- 238000006243 chemical reaction Methods 0.000 claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 26
- 238000001514 detection method Methods 0.000 claims abstract description 24
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 8
- 230000011664 signaling Effects 0.000 claims description 45
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000013519 translation Methods 0.000 claims description 6
- 238000012545 processing Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 238000004891 communication Methods 0.000 description 3
- 238000007781 pre-processing Methods 0.000 description 3
- 208000033999 Device damage Diseases 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000004807 localization Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000004451 qualitative analysis Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
- G05B19/4183—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by data acquisition, e.g. workpiece identification
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- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Quality & Reliability (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Train Traffic Observation, Control, And Security (AREA)
Abstract
The invention discloses a track circuit signal collection system. The track circuit signal collection system comprises a track circuit signal collection unit used for collecting railway track circuit signals, an A/D conversion module, a frequency shift demodulation module used for obtaining a circuit working state detection signal of a track circuit through the frequency shift algorithm through a digital signal, and a data transmission module used for transmitting the circuit working state detection signal demodulated by the frequency shift demodulation module to a supervisor. The track circuit signal collection system can monitor whether railway signals and equipment are normal or not in real time. By collecting current of a ladle copper wire and a cable on a railway, voltage of the track surface and the cable and data like temperature and humidity of railway equipment, the operation situation of each section of the railway can be mastered at any time, the working state of each section is analyzed qualitatively, and possible faults can be removed in advance. When a fault happens, the fault can be positioned to the specific section and the equipment according to the monitor signal, and great convenience is brought to fault removal.
Description
Technical field
The present invention relates to railway track circuit and electrically monitor field, especially relate to a kind of track-circuit signalling acquisition system and method.
Background technology
Whether the circuit that track circuit is formed for conductor with the rail of a section of railway track circuit, taken by rolling stock for automatic, continuous detecting this section of circuit, also for control signal device or switching device, to ensure the equipment of traffic safety.Utilize the rail of rail track to make conductor composition, in order to check with or without train, transmit train occupation information and realize the circuit of transmission of information between ground and train, be referred to as track circuit.In the daily servicing of railway signal, by the detection of the electrical specification to track circuit, adjusting the normal utilization ensureing track circuit, is the pacing items ensureing traffic safety, safeguard driving order.At present, automatic accurate prediction can not be realized to track electric circuit inspection and judge the fault of railway track circuit existing for virtual condition, therefore cannot provide effective preventive means and maintenance to maintainer in time, bring potential safety hazard to railway operation.
There is many deficiencies in existing track-circuit signalling collection and pick-up unit, is therefore necessary to be improved.
Summary of the invention
For the deficiency that above-mentioned prior art exists, the object of this invention is to provide a kind of track-circuit signalling acquisition system and method, it has the feature of automatic acquisition trajectory circuit signal.
An object of the present invention proposes a kind of track-circuit signalling acquisition system; Two of object of the present invention proposes a kind of track-circuit signalling acquisition method.
An object of the present invention is achieved through the following technical solutions:
A kind of track-circuit signalling acquisition system provided by the invention, comprises track-circuit signalling collecting unit, A/D modular converter, DMA transport module, shift frequency demodulation module, storer and data transmission module; Described track-circuit signalling collecting unit, for gathering the circuit working state signal of railway track circuit; Described A/D modular converter, for converting circuit working state signal to digital signal; Described DMA transport module, for by digital data transmission in internal memory; Described shift frequency demodulation module, for obtaining the circuit working state detection signal of track circuit by Frequency-shift by digital signal; Described storer, for storing the process data signal that data processing module exports; Described data transmission module, for being transferred to supervisor by the circuit working state detection signal of shift frequency demodulation module demodulation.
Further, described data transmission module comprises power carrier receiver module and power carrier transmitter module; Described power carrier receiver module by the signal coupling on power lead to track-circuit signalling collecting unit; The data needing to send are transferred to supervisor through being coupled on power lead by described power carrier transmitter module.
Further, described track-circuit signalling collecting unit comprises current sensor, voltage sensor, temperature signal collection unit and moisture signal collecting unit;
Described current sensor, for gathering the current signal of ladle copper cash and cable on railway;
Described voltage sensor, for acquisition trajectory rail level and voltage cable signal;
Described temperature signal collection unit, for gathering the temperature data signal of railway equipment;
Described moisture signal collecting unit, for gathering the humidity data signal of railway equipment.
Further, the track-circuit signalling collecting unit arranged in described supervisor on each interval of promising railway provides the Switching Power Supply of power supply.
Further, the A/D converter that described A/D modular converter adopts STM32 single-chip microcomputer to carry, carries out wheel stream translation by A/D converter to the signal of multiple passage; Specific as follows:
Adopt the timer counter timing of STM32 single-chip microcomputer, when the value of counter is kept to 0, counter overflow, timer enters break in service, triggers A/D conversion, makes the signal of each passage carry out A/D conversion, simultaneously timer reclocking, prepares to trigger next time.
Further, the transmitting procedure of described DMA transport module is as follows:
After A/D conversion there is not module to convert current and voltage signals to digital signal, first by conversion after digital data transmission to the memory field opened up in advance, when the data of memory field reach preset value, trigger DMA transport module to interrupt, enter DMA interrupt service subroutine, digital signal is transferred to respectively the array of each passage store data, and then is input in shift frequency demodulation module.
Two of object of the present invention is achieved through the following technical solutions:
A kind of track-circuit signalling acquisition method provided by the invention, comprises the following steps:
S1: the circuit working state signal gathering railway track circuit;
S2: convert circuit working state signal to digital signal;
S3: by digital data transmission in internal memory;
S4: circuit working state detection signal digital signal being obtained track circuit by Frequency-shift;
S5: circuit working state detection signal is stored in memory;
S6: the circuit working state detection signal of shift frequency demodulation module demodulation is transferred to supervisor;
S7: by the signal coupling on power lead to track-circuit signalling collecting unit;
S8: the data needing to send are transferred to supervisor through being coupled on power lead.
Further, described circuit working state detection signal comprises the current signal, acquisition trajectory rail level and the voltage cable signal that gather ladle copper cash and cable on railway, the temperature data signal gathering railway equipment and gathers the humidity data signal of railway equipment.
Further, the track-circuit signalling collecting unit arranged in described supervisor on each interval of promising railway provides the Switching Power Supply of power supply.
Further, the A/D converter that described A/D conversion adopts STM32 single-chip microcomputer to carry, carries out wheel stream translation by A/D converter to the signal of multiple passage; Specific as follows:
Adopt the timer counter timing of STM32 single-chip microcomputer, when the value of counter is kept to 0, counter overflow, timer enters break in service, triggers A/D conversion, makes the signal of each passage carry out A/D conversion, simultaneously timer reclocking, prepares to trigger next time.
The transmitting procedure of described DMA transmission is as follows:
After A/D conversion there is not module to convert current and voltage signals to digital signal, first by conversion after digital data transmission to the memory field opened up in advance, when the data of memory field reach preset value, trigger DMA transport module to interrupt, enter DMA interrupt service subroutine, digital signal is transferred to respectively the array of each passage store data, and then is input in shift frequency demodulation module.
Adopt after said structure, the present invention compared to the prior art advantageously:
A kind of track circuit acquisition system provided by the invention, can Real-Time Monitoring railway signal and equipment whether normal.By gathering the electric current of ladle copper cash and cable on railway, rail level and voltage cable, and the data such as the humiture of railway equipment.The each section operation situation of railway can be grasped at any time, the duty in each interval of qualitative analysis, contingent fault can be got rid of in advance.When a failure occurs it, by localization of fault to concrete interval and equipment, can bring great convenience for fixing a breakdown according to the signal of monitoring.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described:
Fig. 1 is track circuit collecting unit block diagram of the present invention;
Fig. 2 is track-circuit signalling collecting unit communication scheme of the present invention;
Fig. 3 is track-circuit signalling acquisition management machine frame figure of the present invention.
Embodiment
The following stated is only preferred embodiment of the present invention, does not therefore limit protection scope of the present invention.
Embodiment, see shown in Fig. 1 to Fig. 3:
A kind of track circuit acquisition system provided by the invention, comprises track-circuit signalling collecting unit, A/D modular converter, DMA transport module, shift frequency demodulation module, storer and data transmission module;
Described track-circuit signalling collecting unit, for gathering the circuit working state signal of railway track circuit;
Described A/D modular converter, for converting circuit working state signal to digital signal;
Described DMA transport module, for by digital data transmission in internal memory;
Described shift frequency demodulation module, for obtaining the circuit working state detection signal of track circuit by Frequency-shift by digital signal;
Described storer, for storing the process data signal that data processing module exports;
Described data transmission module, for being transferred to supervisor by the circuit working state detection signal of shift frequency demodulation module demodulation.
Described data transmission module comprises power carrier receiver module and power carrier transmitter module; Described power carrier receiver module by the signal coupling on power lead to track-circuit signalling collecting unit; The data needing to send are transferred to supervisor through being coupled on power lead by described power carrier transmitter module.
Also comprise data preprocessing module, described data preprocessing module is arranged between shift frequency demodulation module and power carrier receiver module, described data preprocessing module is used for carrying out data prediction to the circuit working state detection signal of the track circuit that shift frequency demodulation module is obtained by Frequency-shift, and data prediction comprises and carries out filtering process to data.
Described track-circuit signalling collecting unit comprises current sensor, voltage sensor, temperature signal collection unit and moisture signal collecting unit;
Described current sensor, for gathering the current signal of ladle copper cash and cable on railway;
Described voltage sensor, for acquisition trajectory rail level and voltage cable signal;
Described temperature signal collection unit, for gathering the temperature data signal of railway equipment;
Described moisture signal collecting unit, for gathering the humidity data signal of railway equipment.
The track-circuit signalling collecting unit arranged in described supervisor on each interval of promising railway provides the Switching Power Supply of power supply.
The A/D converter that described A/D modular converter adopts STM32 single-chip microcomputer to carry, carries out wheel stream translation by A/D converter to the signal of multiple passage; Specific as follows:
Adopt the timer counter timing of STM32 single-chip microcomputer, when the value of counter is kept to 0, counter overflow, timer enters break in service, triggers A/D conversion, makes the signal of each passage carry out A/D conversion, simultaneously timer reclocking, prepares to trigger next time.
The transmitting procedure of described DMA transport module is as follows:
After A/D conversion there is not module to convert current and voltage signals to digital signal, first by conversion after digital data transmission to the memory field opened up in advance, when the data of memory field reach preset value, trigger DMA transport module to interrupt, enter DMA interrupt service subroutine, digital signal is transferred to respectively the array of each passage store data, and then is input in shift frequency demodulation module.
Shift frequency demodulation module in the present embodiment calls shift frequency demodulating algorithm and carries out demodulation, obtains real current magnitude of voltage and the low frequency coded signal of digital signal.
Data processing module in the present embodiment adopts calibration coefficient to calculate actual current voltage signal values; According to the order that reason supervisor is sent, complete relevant work, or upload corresponding data or state; And timing uploading detection is to data, uploading corresponding data in real time, and realizing the Real-Time Monitoring to abnormality when having car or device damage.
Storer in the present embodiment is used for calibration coefficient, equipment self ID, the dominant frequency Value Data of storage of collected unit, reads data and configure the mode of operation of track circuit acquisition system during startup.
Software watchdog in the present embodiment, for monitoring program, when program occurs abnormal, reset single-chip microcomputer.Hardware watchdog is used for monitoring single-chip microcomputer, and when single-chip microcomputer does not export pulse to hardware watchdog in 1.6S, hardware watchdog just sends a reset pulse to single-chip microcomputer makes single-chip microcomputer restart.Adopt the communication of power carrier mode between track-circuit signalling collecting unit and supervisor, only need two line power leads, communication distance can reach 10km.
Data processing module in the present embodiment adopts calibration coefficient to calculate actual current voltage signal values; According to the order that reason supervisor is sent, complete relevant work, or upload corresponding data or state; And timing uploading detection is to data, uploading corresponding data in real time, and realizing the Real-Time Monitoring to abnormality when having car or device damage.
The track-circuit signalling collecting unit arranged in supervisor in the present embodiment on each interval of promising railway provides the Switching Power Supply of power supply, each collecting unit is equipped with small-power switching power-supply module, this switch power module has wider input voltage, to adapt to the situation that when long distance is powered, different distance supply voltage pressure reduction is larger, provide stable direct current supply to collecting unit simultaneously.Collecting unit adopts the design of low-power consumption theory, selects high efficiency switch power supply and device, makes its Overall Power Consumption reach minimum, adopts the built-in Switching Power Supply of supervisor just can realize the cascade with dozens of collecting unit
This example additionally provides a kind of track-circuit signalling acquisition method, comprises the following steps:
S1: the circuit working state signal gathering railway track circuit;
S2: convert circuit working state signal to digital signal;
S3: by digital data transmission in internal memory;
S4: circuit working state detection signal digital signal being obtained track circuit by Frequency-shift;
S5: circuit working state detection signal is stored in memory;
S6: the circuit working state detection signal of shift frequency demodulation module demodulation is transferred to supervisor;
S7: by the signal coupling on power lead to track-circuit signalling collecting unit;
S8: the data needing to send are transferred to supervisor through being coupled on power lead.
Described circuit working state detection signal comprises the current signal, acquisition trajectory rail level and the voltage cable signal that gather ladle copper cash and cable on railway, the temperature data signal gathering railway equipment and gathers the humidity data signal of railway equipment.
The track-circuit signalling collecting unit arranged in described supervisor on each interval of promising railway provides the Switching Power Supply of power supply.
The A/D converter that described A/D conversion adopts STM32 single-chip microcomputer to carry, carries out wheel stream translation by A/D converter to the signal of multiple passage; Specific as follows:
Adopt the timer counter timing of STM32 single-chip microcomputer, when the value of counter is kept to 0, counter overflow, timer enters break in service, triggers A/D conversion, makes the signal of each passage carry out A/D conversion, simultaneously timer reclocking, prepares to trigger next time.
The transmitting procedure of described DMA transmission is as follows:
After A/D conversion there is not module to convert current and voltage signals to digital signal, first by conversion after digital data transmission to the memory field opened up in advance, when the data of memory field reach preset value, trigger DMA transport module to interrupt, enter DMA interrupt service subroutine, digital signal is transferred to respectively the array of each passage store data, and then is input in shift frequency demodulation module.
Track-circuit signalling acquisition system widely uses at present, other structure and principle same as the prior art, repeat no more here.
Claims (10)
1. a track-circuit signalling acquisition system, is characterized in that: comprise track-circuit signalling collecting unit, A/D modular converter, DMA transport module, shift frequency demodulation module, storer and data transmission module; Described track-circuit signalling collecting unit, for gathering the circuit working state signal of railway track circuit; Described A/D modular converter, for converting circuit working state signal to digital signal; Described DMA transport module, for by digital data transmission in internal memory; Described shift frequency demodulation module, for obtaining the circuit working state detection signal of track circuit by Frequency-shift by digital signal; Described storer, for storing the process data signal that data processing module exports; Described data transmission module, for being transferred to supervisor by the circuit working state detection signal of shift frequency demodulation module demodulation.
2. track-circuit signalling acquisition system according to claim 1, is characterized in that: described data transmission module comprises power carrier receiver module and power carrier transmitter module; Described power carrier receiver module by the signal coupling on power lead to track-circuit signalling collecting unit; The data needing to send are transferred to supervisor through being coupled on power lead by described power carrier transmitter module.
3. track-circuit signalling acquisition system according to claim 1, is characterized in that: described track-circuit signalling collecting unit comprises current sensor, voltage sensor, temperature signal collection unit and moisture signal collecting unit;
Described current sensor, for gathering the current signal of ladle copper cash and cable on railway;
Described voltage sensor, for acquisition trajectory rail level and voltage cable signal;
Described temperature signal collection unit, for gathering the temperature data signal of railway equipment;
Described moisture signal collecting unit, for gathering the humidity data signal of railway equipment.
4. track-circuit signalling acquisition system according to claim 1, is characterized in that: the track-circuit signalling collecting unit arranged in described supervisor on each interval of promising railway provides the Switching Power Supply of power supply.
5. track-circuit signalling acquisition system according to claim 1, is characterized in that: the A/D converter that described A/D modular converter adopts STM32 single-chip microcomputer to carry, and carries out wheel stream translation by A/D converter to the signal of multiple passage; Specific as follows:
Adopt the timer counter timing of STM32 single-chip microcomputer, when the value of counter is kept to 0, counter overflow, timer enters break in service, triggers A/D conversion, makes the signal of each passage carry out A/D conversion, simultaneously timer reclocking, prepares to trigger next time.
6. track-circuit signalling acquisition system according to claim 1, is characterized in that: the transmitting procedure of described DMA transport module is as follows:
After A/D conversion there is not module to convert current and voltage signals to digital signal, first by conversion after digital data transmission to the memory field opened up in advance, when the data of memory field reach preset value, trigger DMA transport module to interrupt, enter DMA interrupt service subroutine, digital signal is transferred to respectively the array of each passage store data, and then is input in shift frequency demodulation module.
7. a track-circuit signalling acquisition method, is characterized in that: comprise the following steps:
S1: the circuit working state signal gathering railway track circuit;
S2: convert circuit working state signal to digital signal;
S3: by digital data transmission in internal memory;
S4: circuit working state detection signal digital signal being obtained track circuit by Frequency-shift;
S5: circuit working state detection signal is stored in memory;
S6: the circuit working state detection signal of shift frequency demodulation module demodulation is transferred to supervisor;
S7: by the signal coupling on power lead to track-circuit signalling collecting unit;
S8: the data needing to send are transferred to supervisor through being coupled on power lead.
8. track-circuit signalling acquisition method according to claim 7, is characterized in that: described circuit working state detection signal comprises the current signal, acquisition trajectory rail level and the voltage cable signal that gather ladle copper cash and cable on railway, the temperature data signal gathering railway equipment and gathers the humidity data signal of railway equipment.
9. track-circuit signalling acquisition method according to claim 7, is characterized in that: the track-circuit signalling collecting unit arranged in described supervisor on each interval of promising railway provides the Switching Power Supply of power supply.
10. track-circuit signalling acquisition method according to claim 7, is characterized in that: the A/D converter that described A/D conversion adopts STM32 single-chip microcomputer to carry, and carries out wheel stream translation by A/D converter to the signal of multiple passage; Specific as follows:
Adopt the timer counter timing of STM32 single-chip microcomputer, when the value of counter is kept to 0, counter overflow, timer enters break in service, triggers A/D conversion, makes the signal of each passage carry out A/D conversion, simultaneously timer reclocking, prepares to trigger next time.
The transmitting procedure of described DMA transmission is as follows:
After A/D conversion there is not module to convert current and voltage signals to digital signal, first by conversion after digital data transmission to the memory field opened up in advance, when the data of memory field reach preset value, trigger DMA transport module to interrupt, enter DMA interrupt service subroutine, digital signal is transferred to respectively the array of each passage store data, and then is input in shift frequency demodulation module.
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| CN201410453552.8A CN104267633A (en) | 2014-09-09 | 2014-09-09 | Track circuit signal collection system and method |
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| CN201410453552.8A CN104267633A (en) | 2014-09-09 | 2014-09-09 | Track circuit signal collection system and method |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107290648A (en) * | 2017-07-03 | 2017-10-24 | 上海铁路通信有限公司 | A kind of signal collection and transmission apparatus for track circuit |
| CN107607860A (en) * | 2017-10-30 | 2018-01-19 | 上海工程技术大学 | A kind of hand-held track circuit testing device and method |
| CN107807325A (en) * | 2017-10-23 | 2018-03-16 | 柳州铁道职业技术学院 | Based on the theoretical railway track circuit reliability analysis system of multimode and its method |
| CN108248644A (en) * | 2018-02-14 | 2018-07-06 | 宁波思高信通科技有限公司 | A kind of ZPW2000 interval orbits outdoor signal monitors system |
| CN108415324A (en) * | 2018-02-14 | 2018-08-17 | 宁波思高信通科技有限公司 | A kind of railway outdoor signal acquisition system |
| CN109001613A (en) * | 2018-06-20 | 2018-12-14 | 武汉讯康电子技术有限公司 | A kind of track circuit failure In-circiut tester |
| CN112462126A (en) * | 2020-10-23 | 2021-03-09 | 北京全路通信信号研究设计院集团有限公司 | Track circuit outdoor equipment with non-contact voltage acquisition function |
-
2014
- 2014-09-09 CN CN201410453552.8A patent/CN104267633A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107290648A (en) * | 2017-07-03 | 2017-10-24 | 上海铁路通信有限公司 | A kind of signal collection and transmission apparatus for track circuit |
| CN107290648B (en) * | 2017-07-03 | 2024-04-05 | 上海铁路通信有限公司 | Signal acquisition and transmission device for track circuit |
| CN107807325A (en) * | 2017-10-23 | 2018-03-16 | 柳州铁道职业技术学院 | Based on the theoretical railway track circuit reliability analysis system of multimode and its method |
| CN107807325B (en) * | 2017-10-23 | 2023-11-03 | 柳州铁道职业技术学院 | Railway track circuit reliability analysis system and method based on multi-state theory |
| CN107607860A (en) * | 2017-10-30 | 2018-01-19 | 上海工程技术大学 | A kind of hand-held track circuit testing device and method |
| CN108248644A (en) * | 2018-02-14 | 2018-07-06 | 宁波思高信通科技有限公司 | A kind of ZPW2000 interval orbits outdoor signal monitors system |
| CN108415324A (en) * | 2018-02-14 | 2018-08-17 | 宁波思高信通科技有限公司 | A kind of railway outdoor signal acquisition system |
| CN109001613A (en) * | 2018-06-20 | 2018-12-14 | 武汉讯康电子技术有限公司 | A kind of track circuit failure In-circiut tester |
| CN112462126A (en) * | 2020-10-23 | 2021-03-09 | 北京全路通信信号研究设计院集团有限公司 | Track circuit outdoor equipment with non-contact voltage acquisition function |
| WO2022083175A1 (en) * | 2020-10-23 | 2022-04-28 | 北京全路通信信号研究设计院集团有限公司 | Track circuit outdoor device having non-contact voltage acquisition function |
| CN112462126B (en) * | 2020-10-23 | 2023-04-28 | 北京全路通信信号研究设计院集团有限公司 | Track circuit outdoor equipment with non-contact voltage acquisition function |
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Application publication date: 20150107 |