基于LabVIEW的控制阀性能测试评估系统设计

摘要

The control valve is very important in the field of industrial control.however the research on the control valve performance testing and evaluation system is very weak at present.It is very difficult to measure the performance of the control valve accurately by conventional instruments.In view of this situation,this paper has developed a control valve performance test and evaluation system based on NI CompactRIO hardware,various sensors and LabVIEW software,the system can test and evaluate the function of control valves on-line,and can collect the results of the performance evaluation of the control valve in a real-time display similar to the medical report,providing a reference to the valve manufacturer's factory testing,maintenance testing and routine maintenance.Using this system,the performance test and evaluation of a company's direct air open film regulator S9044 were carried out.Experimental results show that the system can fully and accurately test the performance indicators of the control valve,at the same time,the system has a good interactive interface,strong expansibility,and high precision.%控制阀在工业控制领域扮演十分重要的角色,但目前国内对控制阀性能测试评估系统的研究十分薄弱,并且常规的仪器仪表很难精确测试控制阀的性能;针对这种情况,基于NI compactRIO硬件、各类传感器以及LabVIEW软件开发设计了一套控制阀性能测试评估系统,该系统能实时检测、采集处理数据,能够把阀门性能测试过程中的数据自动保存与分析处理,实现了控制阀的在线测试和功能评估,并且可将控制阀各项性能指标评估结果汇集于一张类似体检单的报表显示,给阀门厂商的出厂测试、维修检测以及日常维护提供参考依据;采用该系统对某公司的直通气开式薄膜调节阀S9044进行了性能测试评估,实验结果表明,该系统能够全面、精确地测试出调节阀的各项性能指标,且系统软件交互界面良好、扩展性强、精度高.