作者：伍川辉, 卿云, 吴琛, 杨慧莹

作者单位：西南交通大学机械工程学院, 四川 成都 610031

关键词：地铁车辆;接触网硬点;检测系统;受电弓滑板;垂向加速度和振幅

摘要：

针对地铁车辆弓网系统安全检测的重要性及现有接触网硬点检测技术的不足，基于高低压隔离技术，结合受电弓滑板垂向加速度和滑板振幅，作为硬点评价的基准，研究并设计一种新型地铁车辆接触网硬点在线检测系统。首先，进行硬件设计，选用灵敏度高、误差小的电容式加速度传感器和激光测距仪，以及采样速率高、抗干扰能力强的IMC数字采集器；然后，进行软件设计，基于LabVIEW软件开发环境，编写相应的测试软件，实现垂向加速度信号和高度信号的实时显示与记录；最后，为验证检测系统的测试性能，以杭州地铁2号线地铁车辆为测试对象，于40 km/h、60 km/h和80 km/h的速度级工况下进行装车往返试验。试验结果表明，各工况下前后滑板垂向加速度的最大值分别为3.817 g、9.208 g和15.827 g，单位跨距内的滑板最大振幅分别为19.4 mm、21.4 mm、24.1 mm，并未检测出硬点，与地铁运营单位对实际线路的维护检查结果一致。另对部分测试数据进行分析处理，分析结果可充分体现检测系统的安全性、准确性和实用性。

Design of on-line detection system of the hard point of catenary for metro vehicle
WU Chuanhui, QING Yun, WU Chen, YANG Huiying
School of Mechanical Engineering, Southwest Jiaotong University, Chengdu 610031, China
Abstract: Aiming at the importance of pantograph-catenary operation safety detection for metro vehicles and the shortcomings of existing catenary hard point detection technology, based on the voltage isolation technology, a new type of on-line detection system for catenary hard point of metro vehicles is studied and designed, which combines vertical acceleration and height of pantograph slider as the benchmark of hard point evaluation. Firstly, hardware design is carried out, capacitive accelerometer and laser rangefinder with high sensitivity and small error are selected, so as the IMC digital acquisition device with high sampling rate and strong anti-interference ability. Secondly, software design is carried out, and corresponding test software is compiled based on LabVIEW software development environment, which realizes the real-time display and recording of vertical acceleration signal and height signal. Finally, in order to verify the testing effect of the testing system, the loading round-trip tests were carried out on a Hangzhou Metro Line 2 metro vehicle, under the speed levels of 40 km/h, 60 km/h and 80 km/h. The test results show that the maximum vertical acceleration of the front and rear slides is 3.817 g, 9.208 g and 15.827 g respectively, and the maximum amplitude of the slides in unit span is 19.4 mm, 21.4 mm and 24.1 mm respectively. No hard points are detected, which is consistent with the maintenance inspection results of the actual line by the metro operators. In addition, some test data are analyzed and processed, and the results have fully reflected the safety, accuracy and practicability of the detection system.
Keywords: metro vehicle;catenary hard point;detection system;pantograph slider;vertical acceleration and amplitude
2020, 46(1):77-82  收稿日期: 2018-12-25;收到修改稿日期: 2019-03-22
基金项目: 国家自然科学基金项目(51475387)
作者简介: 伍川辉(1965-),男,四川成都市人,副教授,硕士,主要从事轨道交通车辆检测方面的研究
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