A new track inspection car based on a laser camera system

We develop and build a new type of inspection car.A beam that is not rigidly connected to the train axle boxes and can absorb the vibration and impact caused by the high speed train is used,and a laser-camera measurement system based on the machine vision method is adopted.This method projects structural light onto the track and measures gauge and longitudinal irregularity.The measurement principle and model are discussed.Through numerous practical experiments,the rebuilt car is found to considerably eliminate the measurement errors caused by vibration and impact,thereby increasing measurement stability under high speeds.This new kind of inspection cars have been used in several Chinese administration bureaus.     

高速铁路接触网几何参数立体视觉测量系统

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。