發(fā)布時間：2018-07-16 15:23

【摘要】：液壓傳動實驗是液壓傳動教學的重要組成部分，通過液壓傳動實驗教學，可以讓學生親身接觸液壓元件，參與液壓傳動的實驗操作，掌握其工作原理、結構特點、性能、使用方法及實際應用，真正體會到液壓傳動的各種優(yōu)點，實現(xiàn)教學理論和實踐相結合。但是我們院的QCS003型液壓實驗臺，手工操作繁瑣，實驗過程抽象，測試精度低，難以理解掌握等問題（李光提，2004），已經(jīng)不在適應現(xiàn)代化教學的發(fā)展，制約著教學水平的提高。 隨著計算機和現(xiàn)代測控技術的發(fā)展，，迫切需要一種，操作簡單，實驗過程形象直觀，測試精度高，容易理解掌握并且經(jīng)濟智能化的液壓測控系統(tǒng)。因此通過在QCS003型液壓實驗臺上設計液壓油路，安裝傳感器，電液比例閥，應用先進的虛擬儀器技術和電液比例控制技術以計算機為平臺，開發(fā)了基于虛擬儀器和電液比例技術液壓測控系統(tǒng)。 基于虛擬儀器和電液比例技術液壓測控系統(tǒng)主要包括：液壓泵性能測控系統(tǒng)、溢流閥特性測控系統(tǒng)、節(jié)流調(diào)速回路性能測控系統(tǒng)，三個子系統(tǒng)。 本文采用虛擬儀器技術和電液比例控制技術以計算機為平臺，根據(jù)液壓實驗臺的組成及實驗內(nèi)容的特點開發(fā)了一套計算機自動測控系統(tǒng)。介紹了液壓測控系統(tǒng)硬件的選擇及工作原理，數(shù)字信號和模擬信號采集及防干擾處理方法、電液比例閥閉環(huán)控制系統(tǒng)，完成了整個液壓測控系統(tǒng)的硬件和軟件設計，其中硬件設計包括液壓回路和電氣設計。計算機通過電液比例閥閉環(huán)控制系統(tǒng)改變液壓系統(tǒng)壓力，同時對液壓系統(tǒng)中的流量、轉速、扭矩信號進行采集、存儲和顯示，并對采集的參數(shù)進行分析、處理，實時繪制特性曲線，將機-電-液技術融合為一體。并在此基礎上對試驗結果進行了分析、討論，結果表明系統(tǒng)測試精度高、可靠，軟件界面友好、形象、直觀，易于操作，使學生對實驗原理及液壓元件的功能特性一目了然，并打包生成安裝文件，脫離開發(fā)環(huán)境獨立運行。
[Abstract]:Hydraulic transmission experiment is an important part of hydraulic transmission teaching. Through the teaching of hydraulic transmission experiment, students can contact hydraulic components personally, participate in the experimental operation of hydraulic transmission, master its working principle, structure characteristics and performance. The application method and practical application realize the advantages of hydraulic transmission and realize the combination of teaching theory and practice. However, the QCS003 hydraulic test bench in our institute has many problems, such as complicated manual operation, abstract experimental process, low test precision and difficulty in understanding and mastering (Li Guang-Tianyu 2004), which is no longer adapted to the development of modern teaching and restricts the improvement of teaching level. With the development of computer and modern measurement and control technology, there is an urgent need for a hydraulic measurement and control system with simple operation, visual experimental process, high test precision, easy to understand and master, and economic intelligence. Therefore, by designing hydraulic oil path, installing sensors and electro-hydraulic proportional valves on QCS003 hydraulic test bench, applying advanced virtual instrument technology and electro-hydraulic proportional control technology, the computer is used as the platform. A hydraulic measurement and control system based on virtual instrument and electro-hydraulic proportional technology is developed. The hydraulic measurement and control system based on virtual instrument and electro-hydraulic proportional technology mainly includes: hydraulic pump performance measurement and control system, relief valve characteristic measurement and control system, throttle speed regulation loop performance measurement and control system, three subsystems. In this paper, a computer automatic measurement and control system is developed based on the virtual instrument technology and electro-hydraulic proportional control technology, according to the composition of the hydraulic test bench and the characteristics of the experimental content. This paper introduces the hardware selection and working principle of hydraulic measurement and control system, digital signal and analog signal acquisition and anti-interference processing method, electro-hydraulic proportional valve closed-loop control system, and completes the hardware and software design of the whole hydraulic measurement and control system. The hardware design includes hydraulic circuit and electrical design. The pressure of hydraulic system is changed by the closed loop control system of electro-hydraulic proportional valve. At the same time, the signals of flow, speed and torque in hydraulic system are collected, stored and displayed, and the collected parameters are analyzed and processed. The characteristic curve is drawn in real time, and the mechanical-electro-hydraulic technology is integrated into one. On this basis, the test results are analyzed and discussed. The results show that the system has high testing accuracy, reliable, friendly software interface, visual, intuitive and easy to operate, so that the students can understand the principle of the experiment and the functional characteristics of hydraulic components at a glance. And package to generate installation files, independent of the development environment.
【學位授予單位】：山東農(nóng)業(yè)大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：TH137

【引證文獻】

相關碩士學位論文 前2條

1 沈峰;基于虛擬儀器的三相異步電機變頻調(diào)速[D];蘇州大學;2013年

2 廖芳明;基于模腔壓力反饋的注塑制品質(zhì)量在線監(jiān)控與優(yōu)化[D];華南理工大學;2013年

本文編號：2126804