介紹了采用落地式門式框架結構的金屬材料拉伸試驗機的測試軟件設計原理及實施方案。
測試系統軟件采用Visual C++ 6.0編寫,軟件界面采用對話框式結構。整個應用軟件由數據采集、數據處理和曲線顯示三部分組成。數據采集運用平均濾波法對采集的試驗數據進行實時處理,動態地顯示應力-應變曲線,并監視采集過程中拉伸試驗機運行的異常情況,適當地進行人為干預,并能對人為誤操作作出相應的響應。數據處理依據國家標準GB/T228-2002計算金屬材料最基本的力學性能指標。曲線顯示利用VC工具中強大的圖形處理功能,以更直觀的方式讓試驗人員了解試驗結果和分析試驗材料的力學行為。為進一步方便對試驗結果的綜合分析,軟件還可同時處理20組試驗數據和調入保存試驗數據,并能跟據要求打印出內容全面的試驗報告。軟件運用了模塊化設計理念,具有界面友好操作簡單,可以方便地實現在使用前進行校準的要求,消除了試驗中的盲目性。
關鍵詞:拉伸試驗機;Visual C++;平均濾波;應力-應變曲線;GB/T228-2002
Abstract
Introduced the design principle and operation schemes of the testing software of metallic material experimental stretcher which adopted a floor type and door type framing structure.
The testing system software programed by Visual C++ 6.0 ,and its interface adopted a dialog structure.The whole application software is composed of three parts: the data acquisition, the data processing and the curve displaying.The data acquisition uses an average filter to process the test data real-timely, displays the stress-strain curve dynamically, and keeps watch on to the collect process in the excrescent circumstance of the stretcher working, and carries on the artificial intervention properly, and makes a response for correspond to the artificial mistake working.According to the national standard GB/ T228-2002,the data processing part compute the most fundamental norm of mechanics of metallic material.The curve displaying makes use of the strong graphic processing function of VC tool, which make it easy to understand the test result and analyze the mechanics behavioral of the testing material.For further conveninent to analyze the experimental result comprehensively,software can handle meanwhile 20 teams of the test data,and can print the experimental reports as requested.The software used a modularization design principle, having a friendly interface and operating briefly,and can carry out the request that do the calibration before the test expediently , removed the blindness in the test.
Key words: stretcher; Visual C++; an average filter; the stress-strain curve; GB/T228-2002