水压综合测试试验台控制系统开发

发布时间：2018-03-03 21:46

本文选题：水压试验台　切入点：PLC　出处：《合肥工业大学》2015年硕士论文　论文类型：学位论文

【摘要】：压力容器是工业生产和人民生活中常用的一类零部件,在工作时其内部充满具有一定压力的工作介质。当压力容器发生泄漏或破坏时,会对工业生产和人民生命财产造成极大的危害,所以压力容器在出厂前要进行严格的压力测试。目前国内的液压试验台大多以液压油为测试介质,液压油本身具有易燃易爆、污染环境等缺点,液压试验台也存在劳动强度大、测试精度差、测试效率低等缺点。因此,对水压试验台控制系统的研究与开发,具有重要的实际应用意义。根据试验台的控制要求和实际调试经验,设计了试验台的压力控制方案,采用伺服电机推动压力控制阀的阀芯来控制压力的方案。根据试验台的组成及工作原理,设计了控制系统的总体方案,采用以工控机为上位机,S7-300PLC为下位机主站、S7-200PLC为下位机从站的控制方案。完成了试验台控制系统的硬件设计。根据试验台的控制方案,设计了控制系统的硬件结构,对工控机、PLC、交流伺服系统、传感器等硬件进行选型。根据所选硬件和控制对象设计制作了试验台的电气系统,包括控制系统的PLC外围电路设计、主电路设计、交流伺服系统电路设计。完成了试验台控制系统的软件设计。采用C#编程语言,设计了上位机控制软件,通过工业以太网建立上位机和S7-300PLC之间的S7连接,通过OPC通信实现了S7-300PLC和上位机的数据交换。采用STEP7编程软件,设计了S7-300和S7-200PLC程序,通过MPI通信程序实现了S7-300和S7-200之间的数据交换。通过S7-200PLC控制伺服电机定位精确控制系统压力,实现了系统压力的闭环控制。在完成试验台控制系统调试之后,在水压试验台上对测试样件进行了相关试验,并分析了试验数据。试验结果表明,试验台控制系统满足控制要求,提高了试验台的控制精度和试验效率。
[Abstract]:Pressure vessel is a kind of parts and components commonly used in industrial production and people's daily life. It is filled with working medium with certain pressure when the pressure vessel is leaking or broken. It will do great harm to industrial production and people's life and property. Therefore, pressure vessels should be subjected to strict pressure tests before they leave the factory. At present, most of the domestic hydraulic test stands take hydraulic oil as the test medium, and the hydraulic oil itself is flammable and explosive. The hydraulic test bench has many disadvantages, such as high labor intensity, poor testing precision and low testing efficiency, etc. Therefore, the research and development of the control system of the hydraulic test bed has important practical application significance. According to the control requirements and practical debugging experience of the test bed, the pressure control scheme of the test bed is designed. The valve core of the pressure control valve driven by the servo motor is used to control the pressure. According to the composition and working principle of the test bed, The overall scheme of the control system is designed and the control scheme is adopted in which the industrial control computer is used as the upper computer and the S7-300 PLC as the master station of the lower machine and the S7-200 PLC as the slave station of the lower machine. The hardware design of the control system is completed. According to the control scheme of the test bed, the hardware structure of the control system is designed. According to the selected hardware and control object, the electrical system of the test bench is designed, including the PLC peripheral circuit design of the control system, the main circuit design, the AC servo system circuit design. The software design of the control system of the test bed is completed. The control software of the upper computer is designed by using C # programming language, and the S7 connection between the upper computer and S7-300 PLC is established by industrial Ethernet. The data exchange between S7-300 PLC and upper computer is realized by OPC communication, the S7-300 and S7-200 PLC programs are designed by STEP7 programming software, the data exchange between S7-300 and S7-200 is realized by MPI communication program, and the pressure of servo motor positioning and precise control system is controlled by S7-200 PLC. The closed loop control of system pressure is realized. After the test rig control system is debugged, the test samples are tested on the hydraulic test bench, and the test data are analyzed. The test results show that the test bed control system meets the control requirements. The control precision and test efficiency are improved.
【学位授予单位】：合肥工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH49;TP273

【参考文献】