液压泵试验台测控系统的设计与实现

Design and Implementation of Measurement and Control System for Hydraulic Pump Test-bed

摘要:

为测试液压泵性能参数,设计了以工业计算机和PCI数据采集卡为核心,LabWindows/CVI为软件开发平台的液压泵试验台测控系统；以多线程技术设计程序,采用线程安全变量同步线程；采集、分析、显示系统参数,并利用滞环控制算法将油温控制在35~45℃之间,利用遇限削弱积分PID算法实现出油口、回油口压力控制；设计了人性化的报警功能；通过ODBC接口,每隔1 s将系统运行参数存入数据库,以便分析故障；软件调试界面大大缩短现场调试时间；经过运行测试,系统满足设计要求。

Abstract:

In order to test the performance parameters of hydraulic pump, a measurement and control system for hydraulic pump test-bed is designed, using industrial computer and PCI data acquisition card as its core, LabWindows/CVI as software development platform. Application is designed based on multithreading technology, and using thread safe variables to synchronize threads. The automatic collection,analysis and display of each parameter is realized. The temperature of oil is controlled between 35~45℃ using hysteresis control algorithm. The pressure control of the oil outlet and the oil return port is realized by advanced PID algorithm. Humanized alarm function is designed. Operational parameters are stored in the database per-second through ODBC interface, which can effectively resolve faults when it occur. The debugging interface save the site-testing time greatly. By experiment, the system satisfies design request.