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Design of Highway Overrun Detection System

Author: ShiYongLi
Tutor: ShiWei
School: Taiyuan University of Technology
Course: Signal and Information Processing
Keywords: Overrun Lightning Modular structure Wavelet transform
CLC: TP274
Type: Master's thesis
Year: 2011
Downloads: 84
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Abstract


In recent years, with the rapid development of the road network, vehicle overloading phenomenon is also becoming more common. Highway overrun management system as the key elements of the governance of the overrun, a huge role to play in the highway overrun governance aspects. According to the survey, many overrun detection station is still using the original static weighbridge overrun detection of vehicles, vehicles need to stop measuring timeout detection, detection efficiency is relatively low, has brought great impact to road traffic. The paper is based on this context, in order to adapt to the development of the highway system and to meet countries overrun governance requirements, upgrading of existing overrun detection system. Firstly, a survey of the the overrun detection systems existing hardware facilities, and test the performance of the existing hardware system. On the basis of existing hardware parameters overrun detection system transformation program, and demonstrated the feasibility of the program. Next rehabilitation programs, design applied to overrun detection system the weighing instrument hardware and software part. The hardware portion of the instrument including microprocessor minimum system circuit, the sensor signal acquisition circuit, switch processing circuit, communications interface circuits, keyboard circuit, display circuit, alarm circuit and power circuit. In addition to the power supply circuit and sensor signal acquisition circuit, overrun detection system around to lightning and other instrument may cause interference with the specially designed instrument jamming circuit, to ensure the safe and stable operation of instrument. The software part of the introduction of modular programming ideas, improve the readability of the software. Actual time of writing the software, all interface functions for specific hardware operation package, so that between the module and the module between the system and the module logical relationship has become very clear and easy to understand to write to the overall program has brought great convenience. Finally, the introduction of wavelet analysis algorithm weighing data processing, in dealing with non-stationary signals, as the traditional Fourier transform of the improved algorithm, wavelet algorithm is effective in the removal of signal interference retain the signal contains high frequency components. Using wavelet data processing, based on variable threshold slope method for the determination of the number of axes of the vehicle to improve the accuracy of the determination of the number of axle. A lot of reliability test system, the end result of the detection system designed in full compliance with the requirements to achieve the desired objectives, the detection system has been used in a lot of overrun detection station.

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