动车模型激光测速技术研究  

Research on Laser Technology for Velocity Measurement of EMU Module

作　　者：罗倩倩[1] 赵冬娥[1] 

机构地区：[1]中北大学电子测试技术重点实验室仪器科学与动态测试教育部重点实验室,山西太原030051

出　　处：《测试技术学报》2011年第6期519-524,共6页Journal of Test and Measurement Technology

摘　　要：动车组的高速发展给交通带来了极大便利,但是速度的提高同时也带来高肇事率.为测量动车速度,利用动车模型建立光电测速方案进行速度测试.采用点光源激光器和棱镜原向反射屏构成区截测速模块,使用CCD相机拍摄经过反射屏反射回来的光斑的图像,由此可根据光斑的大小来确定光敏管阵列的尺寸,并且测出棱镜原向反射屏的剩余发散角.分析了影响该系统测速精度的因素,并根据主要的误差来源计算出系统的测速精度可达0.084 7%.通过可行性实验验证了系统的可行性,实验表明,测速模块具有安装方便、占用空间小、成本低、可靠性高等优点.In order to measure the velocity of EMU model, we proposed an optoelectronic measurement method using a spot light laser and a retroreflective screen. The spot image reflected by retroreflective screen was obtained by adopting a CCD camera, and the size of photodiode could be determined according to the size of spot. We measured the remained divergence angle of the prism-type retroreflective film. The factors which effected accuracy of the system are analyzed in detail. The velocity accuracy is up to 0. 0847 % in theory. In the end, experiments validate the system feasibility, and the method has the advantages of easy installation, small space, low cost and high reliability.

关 键 词：点光源激光器 原向反射屏 CCD相机 剩余发散角 测速精度 

分 类 号：TN29[电子电信—物理电子学]