本文選題：測試系統 + 虛擬儀器技術　； 參考：《福州大學》2014年碩士論文

【摘要】：行程開關是一種常用的主令電器,通常利用機械部件的按壓碰撞實現控制電路的通斷,最終實現設備的定位控制、順序控制、極限位置保護等功能,因此其性能好壞直接影響著設備工作次序和安全。目前,生產廠家對行程開關參數的檢驗一般是通過手工測量,操作人員將待檢測的行程開關用不同儀器測量其相關參數。這種測量方式工序較多、過程較復雜,人為因素影響較大,需要熟練的操作人員,并且效率低,不能滿足大批量生產的產品檢驗要求。虛擬儀器技術是計算機與測試技術相結合的產物,已廣泛應用于各種測試系統中。虛擬儀器技術通過專門的軟件將現有的計算機資源和儀器融合在一起,即把計算機強大的運算處理能力和儀器模塊的精確測量及控制能力有效的結合起來,通過軟件編程實現數據采集和運動控制,從而增強了測試系統功能的靈活性,降低了硬件的開發(fā)成本,特別是目前National Instrument公司的LabVIEW開發(fā)平臺可以很好地整合計算機的軟硬件資源。本課題研制的基于虛擬儀器技術的直動式行程開關參數測試系統,為行程開關的性能參數檢測提供了較完整的解決方案。該測試系統以虛擬儀器技術為核心,結合數據采集模塊、伺服控制模塊,實現產品性能參數的測量,并且根據測量結果能自動判別產品合格與否,從而實現直動式行程開關多參數的測量和產品篩選的功能。本測試系統使用時,操作人員只需要將行程開關固定在專用夾具上,按下啟動鍵,即可實現自動測量,并且通過計算機實時顯示測量過程和結果。本論文首先介紹了課題來源,研究背景,國內外研究現狀,明確了課題的研究意義；其次分析了限位開關的機械結構、動作原理、特性參數,結合用戶的需求,設計了系統主要實現的功能和技術要求,并確立了系統總體方案；接著根據系統總體方案設計了系統的硬件,包括機構設計、測試電路設計以及系統抗干擾設計,重點介紹了各部分的原理和功能,為軟件設計提供了硬件平臺；然后描述了系統軟件的實現,包括參數設定模塊、運動控制模塊、數據采集模塊、顯示模塊、菜單管理模塊、打印管理模塊等。最后介紹了荷重傳感器的標定與系統測試實驗,并對測試數據進行統計分析,驗證產品的實用性。測試結果表明該測試系統性能穩(wěn)定,工作可靠,達到了預期的技術指標。
[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.
【學位授予單位】：福州大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM564

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