接触网几何参数测量中的车辆振动补偿方法研究

Vehicle Vibration Compensation Method in OCS Geometrical Parameter Measuring

基于车载方式进行接触网几何参数高精度测量必须进行车辆振动补偿。采用结构光立体视觉技术,研究基于2个激光二维传感器的车辆振动补偿方法。运用激光二维传感器扫描钢轨获得钢轨内侧轮廓的二维位移数据,经过空间坐标变换、数据预处理、钢轨特征提取和补偿参数计算4个环节,实现车辆相对钢轨平面的空间姿态参数的光学非接触式测量。基于车辆振动补偿方法的接触网几何参数检测装置经中国铁道科学研究院集团有限公司环行铁道试验基地和既有运营线路进行现场测试,结果表明:车体振动补偿准确有效,检测装置可准确测量拉出值和导高等接触网几何参数,测量数据重复性良好,在运营线路接触网周期性动态巡检中有效检出了拉出值等接触网几何参数超限。

The vehicle vibration compensation is a must for onboard high-accuracy measuring of OCS geometrical parameters. The paper looks into the vehicle vibration compensation method based on two 2D laser sensors by adopting structured light stereoscopic vision. The 2D laser sensors are used to scan the rail to get 2D displacement data of inner side profile of rail, and after four steps, namely conversion of space coordinates, data pre-processing, rail feature extraction and compensation parameter computing, the optical non-contact measurement of space attitude parameters is achieved between vehicle and rail plane. The inspection device for OCS geometrical parameters based on vehicle vibration compensation method has been tested on both test loop and commercial line, and the results show that the compensation is correct and effective; the device can accurately measure OCS geometrical parameters, e.g. stagger value and wire height, and the repeatability of measured data if favorable. During cyclically dynamic inspection of OCS on commercial line, some out-of-limit parameters, e.g. the stagger were spotted.