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A BTM library detection system based on a spectral analysis technology

A spectrum analysis and trackside technology, applied in the field of railway signal equipment detection, can solve the problems of loose antenna fixing screws, reduced antenna height, accelerated aging speed of electronic components, etc.

Active Publication Date: 2019-05-28
BEIJING JIAODA SIGNAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The BTM antenna works in a high temperature and vibration environment for a long time, which will accelerate the aging speed of electronic components, which may cause the resonance point of the BTM antenna to change or the energy emitted to decrease, so the transponder will lose points.
2. BTM antenna installation height changes
Loose antenna fixing screws and worn wheels will reduce the height of the antenna
3. Electromagnetic environmental noise
The current maintenance method has the following problems: 1. BTM antenna radiation is harmful to the health of maintenance personnel, and there is a danger of strong electricity; 2. During the test, the main electrical equipment of the train is turned off, which is very different from the actual operating environment of the train; 3. Lack of testing of train electromagnetic environment noise; 4. Lack of complete testing (energy, frequency) of BTM antennas; 5. Lack of testing of installation height of BTM antennas; 6. Lack of long-term records and statistical analysis of maintenance data , fault warning

Method used

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  • A BTM library detection system based on a spectral analysis technology
  • A BTM library detection system based on a spectral analysis technology
  • A BTM library detection system based on a spectral analysis technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1 BTM antenna height measurement

[0033] The BTM antenna height refers to the distance from the BTM antenna to the transponder. In the long-term operation of the train, the wheels and rails of the train will be worn to varying degrees, and the installation irregularities or loose screws will cause the distance between the BTM antenna and the transponder to change. At present, maintenance personnel mainly use a ruler to perform manual measurement, which is not only troublesome in the testing process but also has large measurement errors. The invention can realize the automatic and high-precision measurement of the height of the BTM antenna.

[0034]When the train passes the receiving unit, the trackside processing center will measure the height in real time through the altimeter in the receiving unit. However, only the height measured when the BTM antenna is directly above the receiving unit is the height of the BTM antenna, and all other measurements are t...

Embodiment 2

[0036] Embodiment 2 BTM antenna performance test

[0037] BTM antenna performance refers to the energy and frequency emitted by the BTM antenna. The frequency of the BTM antenna signal is a radio frequency signal of 27.095 MHz. The BTM antenna works in a high temperature and vibration environment for a long time, which accelerates the aging speed of the electronic components in the BTM antenna, which may cause changes in the emitted energy and frequency of the BTM antenna. If the energy of the BTM antenna is too low, the transponder cannot be activated normally, resulting in point loss. If the energy of the antenna is too high, it may cause crosstalk. The transponder is activated by receiving 27.095MHz RF energy and converting it into electrical energy. So if the frequency of the BTM antenna changes, the transponder cannot be activated normally.

[0038] When the train passes above the receiving unit, the first receiving antenna in the receiving unit can receive the radio f...

Embodiment 3

[0040] Embodiment 3 Train Environmental Interference Degree Measurement

[0041] The train environment interference degree refers to the electromagnetic environment noise around the BTM antenna. During the operation of the train, there will always be electromagnetic environmental noise, especially at the bottom of the train, where high-power traction equipment and dense cables are installed. The electromagnetic noise generated by the train will be superimposed on the uplink signal of the transponder to be received by the on-board BTM. The direct result is that the decoding time of the BTM becomes longer, the bit rate decreases, the bit error rate increases, and the number of decoding frames decreases. The more serious result is Transponder lost point.

[0042] At present, the maintenance personnel use the following method to test the environmental interference: disconnect the BTM antenna from the launch board, connect the cable directly to the spectrum analyzer, and test thro...

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Abstract

The BTM library inspection system comprises a trackside processing center, a receiving unit, a locomotive identification unit, a BTM detection server and a data terminal. The receiving unit and the locomotive identification unit are connected to the trackside processing center and transmit the obtained data to the trackside processing center; The trackside processing center realizes communicationwith the BTM detection server and sends measured data to the BTM detection server, and the BTM detection server analyzes and judges the data and pushes a result to the data terminal; The receiving unit comprises a receiving antenna used for testing environmental noise and receiving radio frequency signals of the BTM antenna, and when a train passes through the receiving unit, testing of energy andfrequency of the BTM antenna and measurement of the environmental interference degree of the train are completed. The BTM library inspection system has the following technical effects that the BTM antenna test and the locomotive electromagnetic environment noise test are realized through the BTM library inspection system, the BTM equipment state is analyzed and counted for a long time, and earlywarning information is given.

Description

technical field [0001] The invention relates to the application field of railway signal equipment detection, in particular to a system for quickly and automatically realizing BTM antenna and its interference detection system when locomotives and vehicles enter and leave the warehouse. Background technique [0002] With the development of railway transportation, equipment failure has become a bottleneck affecting the development of railway transportation. Equipment failure not only greatly affects the traffic plan, reduces the transportation efficiency of the railway, but also greatly affects the traffic safety. The transponder message transmission module (BTM) is one of the key equipment of the on-board equipment of the EMU. It is composed of the on-board BTM host and the BTM antenna. It is mainly responsible for decoding the encoded message data in the transponder memory and transmitting it to the The VC (vehicle safety computer) unit in the control system ATP provides bas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B17/15H04B17/29H04B17/345
Inventor 王永和刘星宇牟海涛昝永信
Owner BEIJING JIAODA SIGNAL TECH
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