高速铁路接触网几何参数立体视觉测量系统  

Stereo Vision-Based Measurement System for Geometric Parameters of High-Speed Railway Catenary

作　　者：周威 杜馨瑜 薛宪堂 李丁 傅强 张翼 王强 王发灯 任盛伟 Zhou Wei;Du Xinyu;Xue Xiantang;Li Ding;Fu Qiang;Zhang Yi;Wang Qiang;Wang Fadeng;Ren Shengwei(Infrastructure Inspection Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Beijing IMAP Technology Co.Ltd.,Beijing 100081,China)

机构地区：[1]中国铁道科学研究院集团有限公司基础设施检测研究所,北京100081 [2]北京铁科英迈技术有限公司,北京100081

出　　处：《光学学报》2023年第5期120-129,共10页Acta Optica Sinica

基　　金：中国铁道科学研究院集团有限公司基金(2020YJ065)。

摘　　要：接触网几何参数是我国高速铁路供电安全检测监测系统(6C系统)的基本检测内容,是保证电气化铁路安全运营的重要参数。基于多目立体视觉技术研究设计了一种接触网几何参数测量系统,并测量拉出值、接触线高度等几何参数。研究开发了一种高速同步频闪照明技术,该技术使测量系统的功耗显著降低,图像质量和抗阳光干扰能力显著提升。建立了用于接触网几何参数测量的线阵相机立体视觉测量模型,并提出了一种可靠的线阵相机立体视觉匹配方法。采用激光二维传感器进行车体振动补偿并建立了车辆振动补偿模型。研制了接触网几何参数测量系统样机并开展了现场测试。测试结果表明:拉出值和接触线高度的测量精度优于10 mm,所提方法为6C系统提供了一种可靠的接触网几何参数测量手段。Objective A measurement system for geometric parameters of the catenary on rolling stocks is investigated with the multi-view stereo vision technology and then used to measure geometric parameters,such as stagger and contact wire height.The geometric parameters of the catenary are the basic detection content of China's power supply safety inspection and monitoring system for high-speed railways(the 6C system).They are also important parameters to ensure the safe operation of electrified railways.The current measurement methods include the laser scanning methods,such as the one based on structured-light stereo vision and the one based on binocular stereo vision.These methods are weakened by several limitations in the on-board measurement of the geometric parameters of the catenary,such as the low scanning frequency and measurement resolution,the influence of sunlight,and the difficulty in matching homonymous points.Therefore,this paper attempts to propose a multi-view stereo vision technology with line-scan cameras to perform the on-board measurement of the geometric parameters of the catenary.A new kind of high-speed synchronized stroboscopic lighting technology for stereo vision-based measurement is developed to improve the resistance to sunlight interference,enhance image quality,and reduce the power consumption of the measurement system.A measurement model and a matching method for stereo vision with line-scan cameras are proposed.A method of compensating vehicle vibration with two-dimensional laser sensors and the corresponding model for vehicle vibration compensation are constructed.Methods The measurement system is composed of two parts,i.e.,a stereo vision-based measurement module on the train roof and a measurement module for vehicle vibration compensation at the bottom of the train.The stereo vision-based measurement module consists of four line-scan cameras.A line-scan camera model is developed by Euclidean space transformation and perspective projection transformation.A measurement model for geometric

关 键 词：测量 接触网几何参数 立体视觉 频闪照明 

分 类 号：U226.5[交通运输工程—道路与铁道工程]