基于LabVIEW与PLC的泵控缸测控系统研究
发布时间：2018-08-19 06:28
【摘要】：液压缸作为液压系统中重要的组成元件之一,在工程机械、煤矿机械等作业机械中有广泛的应用,因此准确地获得液压缸性能参数尤为重要。泵控缸试验系统是一种对液压缸进行性能和质量检验的重要设备,利用该系统可以完成液压缸的出厂检测和定期的故障检测等。 论文简介了泵控缸试验系统,概述了虚拟仪器、虚拟仪器技术在液压方面的应用及其与PLC相结合方面的应用,阐述了现有泵控缸试验系统组成及原理。以现有的泵控缸试验系统为研究对象,提出了满足系统需求的由采集系统和控制系统组成的整体设计方案。对系统选用的位移传感器、压力传感器、力传感器、数据采集卡和PLC及其特殊功能模块进行了选型。采用LabVIEW开发了该试验系统的测控系统,实现了多通道数据采集、数据处理、数据保存、报警、输出阶跃信号控制、输出梯形波控制等功能。以PLC作为下位机,LabVIEW作为上位机,利用OPC技术实现了下位机与上位机之间的数据通信,编制了下位机与上位机相结合的测控系统程序,其中PLC完成数据的采集,LabVIEW完成数据的处理、显示及保存等。 通过现有的泵控缸试验系统对基于LabVIEW开发的测控系统和LabVIEW与PLC相结合的测控系统都进行了实验分析,实验结果表明这两套测控系统都可实现对泵控缸的位移、压力和负载等参数的测试,同时可实现对泵控缸的加载和速度控制,且系统人机交互界面直观。该系统为现有泵控缸试验系统建立了基于LabVIEW开发的测控系统和基于LabVIEW与PLC相结合的测控系统平台,对类似的泵控缸测控系统的开发也有一定的借鉴和指导意义。
[Abstract]:As one of the most important components in hydraulic system, hydraulic cylinder is widely used in construction machinery, coal mine machinery and so on, so it is very important to obtain the performance parameters of hydraulic cylinder accurately. The pump-controlled cylinder test system is an important equipment for the performance and quality inspection of the hydraulic cylinder. The system can be used to complete the factory inspection and periodic fault detection of the hydraulic cylinder. This paper briefly introduces the pump controlled cylinder test system, summarizes the application of virtual instrument, virtual instrument technology in hydraulic system and its application with PLC, and expounds the composition and principle of the existing pump controlled cylinder test system. Taking the existing pump-controlled cylinder test system as the research object, an overall design scheme consisting of a collection system and a control system is proposed to meet the requirements of the system. The displacement sensor, pressure sensor, data acquisition card, PLC and its special function modules are selected. The measurement and control system of the test system is developed by using LabVIEW. The functions of multi-channel data acquisition, data processing, data saving, alarm, output step signal control and output trapezoid wave control are realized. Using PLC as the lower computer and LabVIEW as the upper computer, the data communication between the lower computer and the upper computer is realized by using OPC technology, and the program of measurement and control system combining the lower computer and the upper computer is compiled, in which PLC completes the data acquisition and data processing. Display and save etc. Through the existing pump-controlled cylinder test system, the measurement and control system based on LabVIEW and the measurement and control system based on LabVIEW and PLC are analyzed experimentally. The experimental results show that the displacement of the pump control cylinder can be realized by the two measurement and control systems. The parameters such as pressure and load can be tested, and the loading and speed control of the pump control cylinder can be realized at the same time, and the man-machine interface of the system is intuitionistic. The system has established the measurement and control system based on LabVIEW and the platform based on the combination of LabVIEW and PLC for the existing pump-controlled cylinder test system, which has some reference and guiding significance for the development of similar pump-controlled cylinder measurement and control system.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH137.51;TP273
本文编号：2190934
[Abstract]:As one of the most important components in hydraulic system, hydraulic cylinder is widely used in construction machinery, coal mine machinery and so on, so it is very important to obtain the performance parameters of hydraulic cylinder accurately. The pump-controlled cylinder test system is an important equipment for the performance and quality inspection of the hydraulic cylinder. The system can be used to complete the factory inspection and periodic fault detection of the hydraulic cylinder. This paper briefly introduces the pump controlled cylinder test system, summarizes the application of virtual instrument, virtual instrument technology in hydraulic system and its application with PLC, and expounds the composition and principle of the existing pump controlled cylinder test system. Taking the existing pump-controlled cylinder test system as the research object, an overall design scheme consisting of a collection system and a control system is proposed to meet the requirements of the system. The displacement sensor, pressure sensor, data acquisition card, PLC and its special function modules are selected. The measurement and control system of the test system is developed by using LabVIEW. The functions of multi-channel data acquisition, data processing, data saving, alarm, output step signal control and output trapezoid wave control are realized. Using PLC as the lower computer and LabVIEW as the upper computer, the data communication between the lower computer and the upper computer is realized by using OPC technology, and the program of measurement and control system combining the lower computer and the upper computer is compiled, in which PLC completes the data acquisition and data processing. Display and save etc. Through the existing pump-controlled cylinder test system, the measurement and control system based on LabVIEW and the measurement and control system based on LabVIEW and PLC are analyzed experimentally. The experimental results show that the displacement of the pump control cylinder can be realized by the two measurement and control systems. The parameters such as pressure and load can be tested, and the loading and speed control of the pump control cylinder can be realized at the same time, and the man-machine interface of the system is intuitionistic. The system has established the measurement and control system based on LabVIEW and the platform based on the combination of LabVIEW and PLC for the existing pump-controlled cylinder test system, which has some reference and guiding significance for the development of similar pump-controlled cylinder measurement and control system.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TH137.51;TP273
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