嵌入式气动电磁阀性能检测仪的研制

发布时间：2018-08-02 21:39

【摘要】：随着现代气动技术的发展，气动电磁阀在工业领域中的应用正日益拓宽，尤其是气动高速电磁阀的应用。在自动控制系统中，电磁阀是动作的执行者，它虽在一个配角的位置，但其对系统安全却起到决定性作用。国内现有的电磁阀检测设备结构复杂、测试功能单一；而国外先进的电磁阀检测设备又不能广泛应用于国内电磁阀生产厂家。因此，研制一套能够保证气动电磁阀出厂质量的性能检测系统显得尤为重要。本文采用嵌入式技术研制了一套气动电磁阀性能检测仪，实现了对二位三通电磁阀、二位五通电磁阀以及三位五通电磁阀等气动电磁阀的动态响应特性、启动气压和泄漏量的测试。主要研究内容如下： （1）首先以两位三通电磁阀为例分析了气动电磁阀的结构和工作机理，从理论的角度对电磁阀的工作特性进行了深入的分析和理解，并运用Simul-ink仿真技术对电磁阀的动态响应特性进行了仿真。然后参考国内现有的一些有关电磁阀的行业标准，制定了电磁阀检测系统的设计方案。 （2）采用基于ARM的嵌入式技术研制了气动电磁阀性能检测仪，实现对电磁阀的动态响应特性、启动气压和泄漏量的测试。检测仪主要由基于ARM处理器的硬件平台、Windows CE操作系统下的测试软件和相应的气路组成。 （3）首先通过试验分析了系统硬件控制部分的响应速度为0.114ms，，可以测试响应时间在ms级的高速电磁阀。然后通过给系统输入已知信号的方式，分析了系统的压力测量精度小于5kPa，系统最高采样频率为10kHz，满足技术要求。最后采用MSA（测量系统分析）中的评定方法I，对不同的二位三通电磁阀、二位五通电磁阀以及三位五通电磁阀做了大量试验，分析了不同类型电磁阀的动态响应特性和启动气压，并参照JB/T10633-2006《专用检测设备评定方法指南》对系统性能进行评定，计算得到的系统测量能力指数（Cg、Cgk）均≥1.33，满足标准JB/T10633-2006对检测设备重复性的要求。 （4）在100kPa~700kPa的气源压力和19V~29V的驱动电压下对不同类型的电磁阀进行了大量的试验，分析了不同的气源压力和驱动电压对电磁阀动态响应特性的影响，为气动电磁阀动态响应特性的改进提供了依据。
[Abstract]:With the development of modern pneumatic technology, the application of pneumatic solenoid valve in industrial field is widening day by day, especially the application of pneumatic high speed solenoid valve. In automatic control system, solenoid valve is the executor of action. Although it is in a supporting position, it plays a decisive role in system safety. The existing solenoid valve detection equipment in China has complex structure and single testing function, while the advanced solenoid valve detection equipment abroad can not be widely used in domestic solenoid valve manufacturers. Therefore, it is very important to develop a performance test system which can guarantee the quality of pneumatic solenoid valve. In this paper, a set of pneumatic solenoid valve performance detector is developed by using embedded technology. The dynamic response characteristics of two-position three-way solenoid valve, two-position five-way solenoid valve and three-position five-way solenoid valve are realized. Initiate air pressure and leakage test. The main research contents are as follows: (1) the structure and working mechanism of the pneumatic solenoid valve are analyzed by taking the two-position three-way solenoid valve as an example, and the working characteristics of the solenoid valve are deeply analyzed and understood from the perspective of theory. The dynamic response characteristics of solenoid valve are simulated by Simul-ink simulation technology. Then referring to some existing industry standards of solenoid valve in China, the design scheme of solenoid valve detection system is established. (2) the pneumatic solenoid valve performance detector is developed by using embedded technology based on ARM. The dynamic response characteristics of solenoid valve and the test of air pressure and leakage are realized. The tester is mainly composed of the test software and the corresponding gas path based on the ARM processor hardware platform. (3) the response speed of the hardware control part of the system is 0.114 Ms, which can be measured. (3) through the experiment, the response speed of the hardware control part of the system is 0.114 ms. A high speed solenoid valve with a response time of Ms. Then, by inputting the known signal to the system, the pressure measurement accuracy of the system is less than 5 KPA and the highest sampling frequency of the system is 10 kHz, which meets the technical requirements. Finally, a large number of tests are made on different two-position three-way solenoid valves, two-position five-way solenoid valves and three-position five-way solenoid valves using the evaluation method in MSA (measuring system Analysis). The dynamic response characteristics and starting pressure of different types of solenoid valves are analyzed. The performance of the system is evaluated according to the JB/T10633-2006 Guide for Evaluation methods of Special testing equipment. The calculated system measurement capability index (CgGK) is 鈮

本文编号：2160830