基于DSP的车辆超重监测与响应系统

发布时间：2018-05-06 20:12

本文选题：DSP + 疲劳　；参考：《大连理工大学》2014年硕士论文

【摘要】：近年来,经济的迅速发展,使得公路和桥梁越来越多,而公路和桥梁的非正常使用,如施工不当、车辆超重等等,也导致了一系列的问题。通常情况下,超重车辆对公路和桥梁结构的损伤比正常载重的车辆大得多,导致路桥结构的过早疲劳。为了对损伤进行实时预警并评估路桥结构的安全性,许多公路和桥梁都安装了结构健康监测系统。然而,由于当前的结构健康监测系统的构建复杂,且系统造价高、安装不便利,使系统不适用于一般公路和桥梁的使用。基于此,本文设计了一种基于DSP (Digital Signal Processor)的小型化、安装方便并且成本低廉的超重监测与响应系统。本系统主要利用路桥表面铺设的传感器阵列所感应的动态实时信号,来对当前的结构损伤加以分析,进而评估道路和桥梁的承载能力和剩余疲劳寿命。系统主要由传感器阵列、电荷放大模块、DSP处理器、超重报警系统以及路桥结构损伤评估五部分组成。传感器阵列系统采用了地感线圈和交通传感器相配合的布设方式,保证了系统可以在车流量较大时依然能准确识别车牌信息、监测车辆载重；传感器阵列产生的信号经过电荷放大器放大后送给DSP处理器,带有内置AD模块的DSP把模拟信号转化成数字信号并结合超重阈值判断是否超重；若车辆超重,系统将对其进行响应处理,包括通过图像采集进行车牌识别、对违规超重车辆报警,同时数据中心采用嵌入式雨流计数法对超重数据进行处理,进而实现对路桥结构的疲劳分析和安全评估。现场测试结果表明：在中速行驶中,车辆压力监测的误差率在3.8%到8.7%之间,系统能够准确地实时监测路桥上车辆的过载情况,通过报警抓拍模块实现了对超重车辆的车牌号码、车牌颜色和通过时间等信息的预警与记录,并且基于超重数据进行稳定的智能疲劳监测。该系统具有小型化、嵌入式结构、实时响应等特点,非常适合常规路桥超载车辆的监测与控制,具有很好的应用前景。
[Abstract]:In recent years, with the rapid development of economy, more and more highways and bridges have been used, and the abnormal use of highways and bridges, such as improper construction, overweight vehicles and so on, has also led to a series of problems. Generally, the damage of overweight vehicles to highway and bridge structures is much greater than that of normal load vehicles, which leads to premature fatigue of road and bridge structures. In order to warn the damage in real time and evaluate the safety of highway and bridge, many highway and bridge are equipped with structural health monitoring system. However, the current structural health monitoring system is not suitable for the general highway and bridge because of its complex construction, high cost and convenient installation. Based on this, a miniaturization, easy installation and low cost overweight monitoring and response system based on DSP Digital Signal Processor is designed in this paper. In this system, the dynamic real-time signals induced by sensor array laid on the surface of the road and bridge are used to analyze the current structural damage, and then to evaluate the bearing capacity and residual fatigue life of the road and bridge. The system consists of sensor array, charge amplifier module and DSP processor, overweight alarm system and damage assessment of road and bridge structure. The sensor array system adopts the collocation mode of ground sensing coil and traffic sensor, which ensures that the system can recognize the license plate information accurately and monitor the vehicle load when the traffic flow is large. The signal generated by the sensor array is amplified by a charge amplifier and sent to the DSP processor. The DSP with a built-in AD module converts the analog signal into a digital signal and determines whether it is overweight or not combined with the overweight threshold; if the vehicle is overweight, The system will deal with its response, including license plate recognition through image collection, warning of illegal overweight vehicles, and the use of embedded rain flow counting method to process the overweight data in the data center. Then the fatigue analysis and safety evaluation of the bridge structure are realized. The field test results show that the error rate of vehicle pressure monitoring is between 3.8% and 8.7%. The system can accurately and real-time monitor the overload of vehicles on the road and bridge, and realize the license plate number of the overweight vehicle by alarm capture module. Warning and recording of license plate color and passing time, and intelligent fatigue monitoring based on overweight data. The system has the characteristics of miniaturization, embedded structure, real-time response and so on. It is very suitable for the monitoring and control of conventional overloaded road and bridge vehicles, and has a good application prospect.
【学位授予单位】：大连理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U418;U446;TP274

【参考文献】