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Research of Monitoring System of Ascending the Top of Electric Locomotives

Author: WangXiaoWei
Tutor: YuXianTao
School: Wuhan University of Technology
Course: Measuring Technology and Instrument
Keywords: AVR ATmegal28 Electric locomotive Monitoring System of Ascending the Top CAN bus
CLC: TP273
Type: Master's thesis
Year: 2010
Downloads: 33
Quote: 0
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Abstract


After running a period of time, Electric locomotive must park in the depot to be repaired and maintained by maintenance personnel. The repair process is as follows: disconnect the isolation switch to cut off the power of overhead contact system (rated at 27,500 volts) in the maintenance district, connect the ground wire with grounding rod, and then the maintenance personnel climb to the top of locomotive to repair and maintenance. After the maintenance work is competed, the ground rod must be removed first, and then the isolation switch should be connected to recover the power of overhead contact system.With the development of railway electrification, ascending the top of electric locomotives and repair work is also put forward higher requirements. The monitoring system takes advantage of existing automation technology to strictly monitor the process of ascending the top of electric locomotives, with the purpose of a safe, efficient and stable process of ascending the top of electric locomotives, and the safety of operators and equipments.The monitoring system, researched in this thesis, has three main hardware components, which are subordinate computer monitoring device based on AVR ATmeg128 MCU, computer monitoring system and CAN-RS232 converter. The subordinate computer monitoring device has friendly man-machine operation interface, which includes the modules such as LCD display, keyboard input, voice prompts, clock display, RF card identification and so on. Additionally, the interlock control among isolation switch, grounding rod, signal light and access-control system in the monitoring system is also a key part of this thesis. In the system, watchman remotely monitors the process of ascending the top of electric locomotives with the computer monitoring system. CAN bus, which has very high anti-interference ability and strong error-correcting capability, is used to transmite data. CAN-RS232 converter is the communication conversion device of the system and the master node of CAN bus network, which makes computer monitoring system connect to CAN bus through RS232 serial interface, and it is the core part of communication.The idea of modular realizes the software of the three components. C language program is used in subordinate computer monitoring device, which makes good program transportability. Computer monitoring system, using VC platform, achieves an efficient interface design, database functionality and communication capabilities. The research completes the hardware and software design, and online debugging, achieving the functional that the system requires.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Automatic control,automatic control system
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