【摘要】：液壓缸作為液壓系統(tǒng)中重要的組成元件之一,在工程機(jī)械、煤礦機(jī)械等作業(yè)機(jī)械中有廣泛的應(yīng)用,因此準(zhǔn)確地獲得液壓缸性能參數(shù)尤為重要。泵控缸試驗(yàn)系統(tǒng)是一種對液壓缸進(jìn)行性能和質(zhì)量檢驗(yàn)的重要設(shè)備,利用該系統(tǒng)可以完成液壓缸的出廠檢測和定期的故障檢測等。 論文簡介了泵控缸試驗(yàn)系統(tǒng),概述了虛擬儀器、虛擬儀器技術(shù)在液壓方面的應(yīng)用及其與PLC相結(jié)合方面的應(yīng)用,闡述了現(xiàn)有泵控缸試驗(yàn)系統(tǒng)組成及原理。以現(xiàn)有的泵控缸試驗(yàn)系統(tǒng)為研究對象,提出了滿足系統(tǒng)需求的由采集系統(tǒng)和控制系統(tǒng)組成的整體設(shè)計(jì)方案。對系統(tǒng)選用的位移傳感器、壓力傳感器、力傳感器、數(shù)據(jù)采集卡和PLC及其特殊功能模塊進(jìn)行了選型。采用LabVIEW開發(fā)了該試驗(yàn)系統(tǒng)的測控系統(tǒng),實(shí)現(xiàn)了多通道數(shù)據(jù)采集、數(shù)據(jù)處理、數(shù)據(jù)保存、報(bào)警、輸出階躍信號控制、輸出梯形波控制等功能。以PLC作為下位機(jī),LabVIEW作為上位機(jī),利用OPC技術(shù)實(shí)現(xiàn)了下位機(jī)與上位機(jī)之間的數(shù)據(jù)通信,編制了下位機(jī)與上位機(jī)相結(jié)合的測控系統(tǒng)程序,其中PLC完成數(shù)據(jù)的采集,LabVIEW完成數(shù)據(jù)的處理、顯示及保存等。 通過現(xiàn)有的泵控缸試驗(yàn)系統(tǒng)對基于LabVIEW開發(fā)的測控系統(tǒng)和LabVIEW與PLC相結(jié)合的測控系統(tǒng)都進(jìn)行了實(shí)驗(yàn)分析,實(shí)驗(yàn)結(jié)果表明這兩套測控系統(tǒng)都可實(shí)現(xiàn)對泵控缸的位移、壓力和負(fù)載等參數(shù)的測試,同時(shí)可實(shí)現(xiàn)對泵控缸的加載和速度控制,且系統(tǒng)人機(jī)交互界面直觀。該系統(tǒng)為現(xiàn)有泵控缸試驗(yàn)系統(tǒng)建立了基于LabVIEW開發(fā)的測控系統(tǒng)和基于LabVIEW與PLC相結(jié)合的測控系統(tǒng)平臺,對類似的泵控缸測控系統(tǒng)的開發(fā)也有一定的借鑒和指導(dǎo)意義。
[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.
【學(xué)位授予單位】：安徽理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TH137.51;TP273

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