基于虚拟仪器和电液比例技术液压测控系统的设计
发布时间：2018-07-16 15:23
【摘要】：液压传动实验是液压传动教学的重要组成部分，通过液压传动实验教学，可以让学生亲身接触液压元件，参与液压传动的实验操作，掌握其工作原理、结构特点、性能、使用方法及实际应用，真正体会到液压传动的各种优点，实现教学理论和实践相结合。但是我们院的QCS003型液压实验台，手工操作繁琐，实验过程抽象，测试精度低，难以理解掌握等问题（李光提，2004），已经不在适应现代化教学的发展，制约着教学水平的提高。 随着计算机和现代测控技术的发展，，迫切需要一种，操作简单，实验过程形象直观，测试精度高，容易理解掌握并且经济智能化的液压测控系统。因此通过在QCS003型液压实验台上设计液压油路，安装传感器，电液比例阀，应用先进的虚拟仪器技术和电液比例控制技术以计算机为平台，开发了基于虚拟仪器和电液比例技术液压测控系统。 基于虚拟仪器和电液比例技术液压测控系统主要包括：液压泵性能测控系统、溢流阀特性测控系统、节流调速回路性能测控系统，三个子系统。 本文采用虚拟仪器技术和电液比例控制技术以计算机为平台，根据液压实验台的组成及实验内容的特点开发了一套计算机自动测控系统。介绍了液压测控系统硬件的选择及工作原理，数字信号和模拟信号采集及防干扰处理方法、电液比例阀闭环控制系统，完成了整个液压测控系统的硬件和软件设计，其中硬件设计包括液压回路和电气设计。计算机通过电液比例阀闭环控制系统改变液压系统压力，同时对液压系统中的流量、转速、扭矩信号进行采集、存储和显示，并对采集的参数进行分析、处理，实时绘制特性曲线，将机-电-液技术融合为一体。并在此基础上对试验结果进行了分析、讨论，结果表明系统测试精度高、可靠，软件界面友好、形象、直观，易于操作，使学生对实验原理及液压元件的功能特性一目了然，并打包生成安装文件，脱离开发环境独立运行。
[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.
【学位授予单位】：山东农业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137
本文编号：2126804
[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.
【学位授予单位】：山东农业大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137
【引证文献】
相关硕士学位论文 前2条
1 沈峰;基于虚拟仪器的三相异步电机变频调速[D];苏州大学;2013年
2 廖芳明;基于模腔压力反馈的注塑制品质量在线监控与优化[D];华南理工大学;2013年
本文编号：2126804
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