基于虚拟仪器技术的直动式行程开关参数测试系统的研制

发布时间：2018-05-25 20:59

本文选题：测试系统 + 虚拟仪器技术　；参考：《福州大学》2014年硕士论文

【摘要】：行程开关是一种常用的主令电器,通常利用机械部件的按压碰撞实现控制电路的通断,最终实现设备的定位控制、顺序控制、极限位置保护等功能,因此其性能好坏直接影响着设备工作次序和安全。目前,生产厂家对行程开关参数的检验一般是通过手工测量,操作人员将待检测的行程开关用不同仪器测量其相关参数。这种测量方式工序较多、过程较复杂,人为因素影响较大,需要熟练的操作人员,并且效率低,不能满足大批量生产的产品检验要求。虚拟仪器技术是计算机与测试技术相结合的产物,已广泛应用于各种测试系统中。虚拟仪器技术通过专门的软件将现有的计算机资源和仪器融合在一起,即把计算机强大的运算处理能力和仪器模块的精确测量及控制能力有效的结合起来,通过软件编程实现数据采集和运动控制,从而增强了测试系统功能的灵活性,降低了硬件的开发成本,特别是目前National Instrument公司的LabVIEW开发平台可以很好地整合计算机的软硬件资源。本课题研制的基于虚拟仪器技术的直动式行程开关参数测试系统,为行程开关的性能参数检测提供了较完整的解决方案。该测试系统以虚拟仪器技术为核心,结合数据采集模块、伺服控制模块,实现产品性能参数的测量,并且根据测量结果能自动判别产品合格与否,从而实现直动式行程开关多参数的测量和产品筛选的功能。本测试系统使用时,操作人员只需要将行程开关固定在专用夹具上,按下启动键,即可实现自动测量,并且通过计算机实时显示测量过程和结果。本论文首先介绍了课题来源,研究背景,国内外研究现状,明确了课题的研究意义；其次分析了限位开关的机械结构、动作原理、特性参数,结合用户的需求,设计了系统主要实现的功能和技术要求,并确立了系统总体方案；接着根据系统总体方案设计了系统的硬件,包括机构设计、测试电路设计以及系统抗干扰设计,重点介绍了各部分的原理和功能,为软件设计提供了硬件平台；然后描述了系统软件的实现,包括参数设定模块、运动控制模块、数据采集模块、显示模块、菜单管理模块、打印管理模块等。最后介绍了荷重传感器的标定与系统测试实验,并对测试数据进行统计分析,验证产品的实用性。测试结果表明该测试系统性能稳定,工作可靠,达到了预期的技术指标。
[Abstract]:The stroke switch is a kind of common main command appliance, which usually uses the press and impact of mechanical parts to realize the on-off of the control circuit, and finally realizes the functions of location control, sequence control, limit position protection and so on. Therefore, its performance directly affects the working order and safety of the equipment. At present, the inspection of stroke switch parameters by manufacturers is usually by manual measurement, the operator will test the stroke switch with different instruments to measure the relevant parameters. This kind of measuring method has many working procedures, complex process, great influence of human factors, needs skilled operators, and low efficiency, which can not meet the requirements of mass production of product inspection. Virtual instrument technology is a combination of computer and test technology, which has been widely used in various test systems. Virtual instrument technology integrates the existing computer resources and instruments through special software, that is, the powerful computing and processing ability of the computer is effectively combined with the accurate measurement and control ability of the instrument module. Data acquisition and motion control are realized by software programming, which enhances the flexibility of the test system and reduces the cost of hardware development. Especially, the current LabVIEW development platform of National Instrument company can integrate the software and hardware resources of the computer very well. Based on the virtual instrument technology, a direct stroke switch parameter testing system is developed in this paper, which provides a more complete solution for the performance parameter detection of stroke switch. The testing system takes virtual instrument technology as the core, combines data acquisition module and servo control module, realizes the measurement of product performance parameters, and can automatically judge whether the product is qualified or not according to the measurement results. Thus, the function of measuring multi-parameter and product screening of straight-acting stroke switch is realized. When the test system is used, the operator only need to fix the stroke switch on the special fixture and press the start key to realize the automatic measurement, and display the measurement process and results in real time by computer. This paper firstly introduces the source of the subject, the background of the research, the current situation of the research at home and abroad, and clarifies the significance of the research; secondly, it analyzes the mechanical structure, the principle of action, the characteristic parameters of the limit switch, and combines the needs of the user. The main functions and technical requirements of the system are designed, and the overall scheme of the system is established. Then, the hardware of the system is designed according to the overall scheme of the system, including the design of the mechanism, the design of the test circuit and the design of the anti-interference of the system. The principle and function of each part are introduced in detail, which provides a hardware platform for software design, and then describes the realization of the system software, including parameter setting module, motion control module, data acquisition module, display module, menu management module. Print management module, etc. Finally, the calibration of load sensor and system test experiment are introduced, and the test data are statistically analyzed to verify the practicability of the product. The test results show that the performance of the test system is stable, reliable and up to the expected technical targets.
【学位授予单位】：福州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM564

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