电气化铁路接触网定位器坡度动态视觉测量方法研究

Study on dynamic vision measurement for locator slope gradient of electrified railway overhead catenary

定位器坡度是电气化铁路接触网重要参数,其大小不仅影响弓网受流质量,还关系列车行驶安全。随着铁路运营里程增加和线路日益繁忙,对定位器坡度检测效率和精度的要求随之提高。如何在高速动态条件下,自动精确获取定位器坡度信息,成为接触网运营维护面临的重要难题。针对定位器坡度动态测量实际需要,提出采用双目立体视觉测量技术,对定位器坡度进行车载动态检测。系统介绍了双目立体视觉测量技术进行定位器坡度测量原理,详细推导了测量计算方法,建立了定位器坡度动态测量模型。基于此,研制定位器坡度检测装置,并进行现场动态测量试验,与人工静态测量值相比,最大偏差为0.28°。试验结果表明,测量方法切实可行,为该项技术应用于电气化铁路接触网定位器车载动态测量提供了试验基础。

Locator slope gradient parameters( LSGP) of overhead catenary system( OCS) are critical to the electrified railways. They not only determine current collecting performance between pantograph and OCS,but also influence the safety of the driving trains. With the railway speed continuously improving and railway lines increasingly busy,the efficiency and accuracy of LSGP detection should be improved accordingly. Therefore,how to automatically obtain accurate LSGP with high-speed is the key issue for the operation and maintenance of OCS. In order to meet the needs of dynamic inspection of LSGP,an approach based on binocular stereo vision technique is proposed. The principle of binocular stereo vision is introduced systematically. The measurement and calculation method of LSGP is deduced in detail,and the dynamic measurement model is established. At last,the setup of LSGP dynamic inspection is developed. The maximum error of LSGP between the manual measurement results and the proposed measurement results is 0. 28 degree. The experiment results show that the proposed method is feasible,which lays a foundation for its application in the railway LSGP dynamic measurement.