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The train hot -axis monitoring system analog board development and research

Author: ZhengDong
Tutor: ZhouFeng
School: Fudan University
Course: Electronics and Communication Engineering
Keywords: Hot Bearing Detector ADC
CLC: TP274.4
Type: Master's thesis
Year: 2008
Downloads: 19
Quote: 0
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Abstract


Today’s society, with the increasing of requirement on rail transport, which requires to continually improve train speed, so that we can get higher transport capacity with the limited resources of the track conditions. At the same time as science and technology development, we often use rail to transport some new material, much of these materials may contain harmful ingredients. Over these cases, the safety and reliability become more and more important for rail, no matter they are passenger or cargo that cannot be packed there.See the major incidents on rail transportation, the most serious is the collided and derailed the train. Exclude that improper operation by human, many crashes is because of the signal equipment communications error, and the derailment is because of wheel or axle overheated and caused the fracture. This let the monitoring for unsafe axles and wheels and early detection for hidden dangers become more and more important.All wheel journals generate heat while the train is moving. This heat is caused by normal friction between the axle, oil, and bearings. Some of the heat is transmitted to the bearing housing. The magnitude of the transmitted heat depends on the amount of friction between the axle and the bearing. If the journal lacks lubrication or if the axle or bearings have mechanical flaws, the heat generated will increase in proportion to the increased friction.The Micro Hot Box Detector (MicroHBD) is a compact and accurate system, which monitors and reports the status of wheel bearings (journals). The system collects analog heat signals as wheels cross the scanners and analyses the information for any abnormal heat. The system provides automatic alarm decision-making for bi-directional train operation. Alarm conditions are recorded for later retrieval and reported to the train-engineers through radio. Data may also be transmitted to a remote Office through a dial-up or polled communications network.MicroHBD system using advanced filtering technology and algorithms to detect heat-axis failure to reduce the possible derailment accident, and to provide important analysis of the warning to avoid burning shaft / cut shaft accident or damaged lines. Through a simple user interface, we can easily configure MicroHBD system; it will also monitor the analog input voltage through the serial port, the ambient temperature, battery voltage, wind speed and direction. The highest detection rate could reach 500 km/h (310 mph).We will describe the development for analog module of the MicroHBD system in this article.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Data processing, data processing system > Centralized testing and roving detection system
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