霍夫变换在接触线磨耗检测算法中的应用

Application of Hough transform in contact wire wear detection algorithm

当机车运行在电气化铁路上时,需要保证弓网系统持续可靠供电,而接触线的磨耗会影响受流质量,需要对其进行实时监测。针对现有的接触线磨耗实时检测系统精度低、鲁棒性差等问题,提出一种基于霍夫变换的接触线磨耗检测算法。首先,使用均值漂移算法及三次样条插值对结构光设备采集到的接触线轮廓数据进行预处理;然后,根据霍夫变换确定接触线圆心;最后,结合接触线的几何特点计算接触线的磨耗量。试验结果表明,与经典的最小二乘法拟合相比,该方法计算精度更高、鲁棒性更好,且能满足接触线磨耗实时检测需求。

When the locomotive is running on an electrified railway, it is necessary to ensure the continuous and reliable power supply of the catenary system. The contact wire wear will affect the current-receiving quality, and it needs to be monitored in real time. For the low accuracy and poor robustness of the current contact wire wear detection system, a contact wire wear detection algorithm based on Hough transform was presented. Firstly, the profile data collected by the structured light device was preprocessed with mean shift algorithm and cubic spline interpolation;secondly, the center of the contact wire was determined according to Hough transform;finally, the wear based on the geometric characteristics of contact wire was calculated. Experimental results show that the method has better accuracy and robustness compared with the classical least squares fitting, and can meet the real-time detection requirements.