水泥基压电传感器动态称重系统研究
发布时间：2019-02-16 02:05
【摘要】：随着社会与经济的快速发展，交通流量迅速上升，超载现象日益普遍和严重。超载现象降低了路面的使用效率，对路面造成了严重的损坏，严重的扰乱了交通秩序，造成了国家财政的大量流失，严重的威胁到了人民群众的生命安全。动态称重系统（weigh inmotion，简称WIM）能够动态监测车辆的载重情况，提高我国的公路管理水平，成为一个重要的课题。本文针对动态称重的关键技术进行了相应的研究，主要工作如下： 1.在动态称重系统的数据处理技术方面，本文结合振动力学的杜哈梅积分和压电传感器的压电效应，建立了一种水泥基压电传感器的动态称重系统的基本理论算法。该算法由压电传感器的电压幅值求得车辆对横梁的压力，从而求出车辆轴重。经过实验测试，基本理论算法具有一定准确性。 2.针对车辆速度对本文提出的数据处理基本理论算法造成的测量精度的影响，，提出了一种基于速度衰减的动态称重补偿算法，该算法提高了系统的测量精度，降低了车辆速度带来的测量误差。 3.基于上面算法，本文采用本课题组设计的新型的水泥基压电传感器，设计了一套动态称重系统。测试数据显示，该系统平均测量误差低至238%，达到了动态称重系统的测量要求，具有良好的应用前景。
[Abstract]:With the rapid development of society and economy, traffic flow rises rapidly and overload phenomenon becomes more and more serious. The phenomenon of overload reduces the use efficiency of the pavement, causes serious damage to the road surface, seriously disturbs the traffic order, causes the massive loss of the national finance, and seriously threatens the life safety of the people. (weigh inmotion, (dynamic weighing system for short WIM) can dynamically monitor the load of vehicles and improve the level of highway management in China. It has become an important subject. The key technologies of dynamic weighing are studied in this paper. The main work is as follows: 1. In the aspect of data processing technology of dynamic weighing system, a basic theoretical algorithm of dynamic weighing system based on cement based piezoelectric sensor is established by combining Duhamay integral of vibration dynamics and piezoelectric effect of piezoelectric sensor. Based on the voltage amplitude of the piezoelectric sensor, the pressure of the vehicle on the beam is obtained, and the axle load of the vehicle is obtained. The experimental results show that the basic theory and algorithm have certain accuracy. 2. In view of the influence of vehicle speed on the measurement accuracy caused by the basic theoretical algorithm of data processing proposed in this paper, a dynamic weighing compensation algorithm based on velocity attenuation is proposed, which improves the measurement accuracy of the system. The measurement error caused by vehicle speed is reduced. 3. Based on the above algorithm, a dynamic weighing system is designed using a new cement based piezoelectric sensor designed by our team. The test data show that the average measurement error of the system is as low as 238, which meets the measurement requirements of the dynamic weighing system and has a good application prospect.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U492.31;TP212.9
本文编号：2423937
[Abstract]:With the rapid development of society and economy, traffic flow rises rapidly and overload phenomenon becomes more and more serious. The phenomenon of overload reduces the use efficiency of the pavement, causes serious damage to the road surface, seriously disturbs the traffic order, causes the massive loss of the national finance, and seriously threatens the life safety of the people. (weigh inmotion, (dynamic weighing system for short WIM) can dynamically monitor the load of vehicles and improve the level of highway management in China. It has become an important subject. The key technologies of dynamic weighing are studied in this paper. The main work is as follows: 1. In the aspect of data processing technology of dynamic weighing system, a basic theoretical algorithm of dynamic weighing system based on cement based piezoelectric sensor is established by combining Duhamay integral of vibration dynamics and piezoelectric effect of piezoelectric sensor. Based on the voltage amplitude of the piezoelectric sensor, the pressure of the vehicle on the beam is obtained, and the axle load of the vehicle is obtained. The experimental results show that the basic theory and algorithm have certain accuracy. 2. In view of the influence of vehicle speed on the measurement accuracy caused by the basic theoretical algorithm of data processing proposed in this paper, a dynamic weighing compensation algorithm based on velocity attenuation is proposed, which improves the measurement accuracy of the system. The measurement error caused by vehicle speed is reduced. 3. Based on the above algorithm, a dynamic weighing system is designed using a new cement based piezoelectric sensor designed by our team. The test data show that the average measurement error of the system is as low as 238, which meets the measurement requirements of the dynamic weighing system and has a good application prospect.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U492.31;TP212.9
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本文编号：2423937
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