利用摄影测量在线检测轨道车辆车体运行姿态  

On-line Detection of Car-Body Running Attitude for Railway Vehicle Based on Photogrammetry

作　　者：李田[1,2,3] 鲁寨军 刘应龙[4] 刘东润 LI Tian;LU Zhaijun;LIU Yinglong;LIU Dongrun(Key Laboratory of Traffic Safety on Track,Ministry of Education,Central South University,Changsha 410075,China;Joint International Research Laboratory of Key Technology for Rail Traffic Safety,Changsha 410075,China;National ＆ Local Joint Engineering Research Center of Safety Technology for Rail Vehicle,Changsha 410075,Chin;Modern Education Center,Central South University,Changsha 410075,China)

机构地区：[1]中南大学轨道交通安全教育部重点实验室,湖南长沙410075 [2]轨道交通安全关键技术国际合作联合实验室,湖南长沙410075 [3]轨道交通列车安全保障技术国家地方联合工程研究中心,湖南长沙410075 [4]中南大学现代教育中心,湖南长沙410075

出　　处：《武汉大学学报（信息科学版）》2018年第7期1015-1021,共7页Geomatics and Information Science of Wuhan University

基　　金：国家重点研发计划(2016YFB1200104)~~

摘　　要：轨道车辆运行时产生的各种振动导致车体相对于轨道的运行姿态发生变化,提出利用面阵相机和线激光组合的摄影测量方法在线检测车体运行姿态。检测系统安装在车体上可拍摄到轨面的任意位置（3点非共线）,选择激光在轨面投影的中点作为参考点,通过标定得到参考点在计算机图像坐标系和车体坐标系中的空间变换关系;车辆运动过程中,面阵相机拍摄线激光在轨面上的投影,将参考点在计算机图像坐标系中的坐标转化为车体坐标系中的坐标;结合参考点在轨面随行坐标系中的坐标特性,解算车体相对于轨道的坐标系转换,建立描述车体相对于轨道实时运行姿态的数学模型;构建检测系统,通过车体振动模拟平台及现场实车试验,验证了检测系统的可靠性。The running attitude of car-body relative to the track will change because of various vibrations during railway vehicle operation. In this paper,a photogrammetric method based on area array camera and line laser is proposed to measure running attitude of car-body. Firstly,the system is installed at any position of the car-body as long as being able to scan the track and all three positions are non-collinear; the middle point of line laser projection on rail surface is selected as the reference point; and the calibration method is proposed to build the space coordinate transformation of the reference point between image coordinate system and vehicle coordinate system. Secondly,the area array camera will shoot the projection of line laser on rail surface,and the coordinate of the reference point in image coordinate system will be converted into the coordinate in vehicle coordinate system during operation. Then,the mathematical model is established to obtain the running attitude of car-body through coordinates transformation of three reference points in the vehicle coordinate system. Finally,the detection system is built and experiments were carried out both on the car-body vibration simulation platform and the real vehicle. The comparative results verify the reliability of measurement system.

关 键 词：摄影测量 车体运行姿态 空间变换 坐标系转换 在线检测 

分 类 号：P235[天文地球—摄影测量与遥感]