介绍了采用落地式门式框架结构的金属材料拉伸试验机的测试软件设计原理及实施方案。
测试系统软件采用Visual C++ 6.0编写,软件界面采用对话框式结构。整个应用软件由数据采集、数据处理和曲线显示三部分组成。数据采集运用平均滤波法对采集的试验数据进行实时处理,动态地显示应力-应变曲线,并监视采集过程中拉伸试验机运行的异常情况,适当地进行人为干预,并能对人为误操作作出相应的响应。数据处理依据国家标准GB/T228-2002计算金属材料最基本的力学性能指标。曲线显示利用VC工具中强大的图形处理功能,以更直观的方式让试验人员了解试验结果和分析试验材料的力学行为。为进一步方便对试验结果的综合分析,软件还可同时处理20组试验数据和调入保存试验数据,并能跟据要求打印出内容全面的试验报告。软件运用了模块化设计理念,具有界面友好操作简单,可以方便地实现在使用前进行校准的要求,消除了试验中的盲目性。
关键词:拉伸试验机;Visual C++;平均滤波;应力-应变曲线;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