作者：王学影1, 陈勇飞1, 胡晓峰1, 郭斌2
作者单位：1. 中国计量大学计量测试工程学院, 浙江 杭州 310018;
2. 杭州沃镭智能科技股份有限公司, 浙江 杭州 310018
关键词：中继阀;数据采集;计算机控制;自动化;不确定度
摘要：
目前中继阀的检测主要依靠整体制动机试验台，且检测步骤繁琐，测试精度、效率无法保障。针对中继阀由总风遮断阀、管座、双阀口式中继阀3部分组成的结构，采用自动控制与数字信号处理技术，设计一套中继阀性能检测系统。基于PCI数据采集控制卡，设计计算机数据采集控制系统，开发LabVIEW中继阀数据采集控制软件，搭建中继阀实验平台。模拟中继阀在缓解充气、缓解保压、制动、制动保压、过充5种状态下，实现对总风遮断阀动态响应、列车管阶段增压减压、活塞灵敏度、供气阀供气、排气阀排气、过充等6项测试，并采用差压法对其密封性进行测试。测试得到总风遮断阀平均动态响应时间为0.206 s，活塞灵敏度平衡性能最大压力不确定度为0.849 kPa，供气阀供气性能最大压力不确定度为0.864 kPa，排气阀排气性能最大压力不确定度为0.854 kPa，过充最大压力不确定度为0.851 kPa。实验结果表明：系统性能稳定，满足中继阀各性能测试要求。
Design of performance testing system for relay valve
WANG Xueying1, CHEN Yongfei1, HU Xiaofeng1, GUO Bin2
1. College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, China;
2. Hangzhou Wolei Intelligent Technology Co., Ltd., Hangzhou 310018, China
Abstract: Currently, the performance testing of relay valve mainly relies on whole brake test bench and the testing steps are complicated and the precision and efficiency cannot be guaranteed. As the relay valve is composed of three parts, i.e. main air shutoff valve, pipe base and double-ported relay valve, the technology of automatic control and digital signal processing is used to design a set of performance testing system for relay valve. Based on PCI data acquisition and control card, a computer data acquisition and control system is designed, LabVIEW relay valve data acquisition and control software is developed, and a relay valve test bench is established. Under the five conditions of relieved inflation, relieved pressure maintaining, brake, service lap and over-inflation, the dynamic response of main air shutoff valve, staged pressure increase and decrease of train pipe, piston sensitivity, air supply of air supply valve, air exhaust of air exhaust valve and over-inflation are tested and differential pressure method is used to test its sealing performance. The testing results show that the average dynamic response time of the main air shutoff valve is 0.206 s, the maximum pressure uncertainty of piston sensitivity performance is 0.849 kPa, the maximum pressure uncertainty of air supply valve performance is 0.864 kPa, the maximum pressure uncertainty of air exhaust valve performance is 0.854 kPa, and the maximum pressure uncertainty of over-inflation performance is 0.851 kPa. The testing results show that the system has stable performance and meets the performance testing requirements of relay valve.
Keywords: relay valve;data acquisition;computer control;automation;uncertainty
2018, 44(5): 37-42,57 收稿日期: 2018-02-19;收到修改稿日期: 2018-03-12
基金项目: 国家质量监督检验检疫总局科技计划项目（2015QK288）；浙江省公益技术应用研究计划（2015C3108）；杭州市汽车零部件智能检测科技创新服务平台（20151433S01）
作者简介: 王学影(1979-),女,黑龙江大庆市人,副教授,博士,硕士生导师,研究方向为光电检测、坐标测量技术。
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