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摘要：
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在金属材料拉伸试验中,传统的基于接触式引伸计测量存在诸如不能测量较软质材料,不能应用于高温环境,并且由于接触夹持力的影响会引进实验误差等缺陷。本文利用椭圆拟合技术,建立了基于应变网格的非接触实时检测系统,实现了金属材料在加载过程中长度和宽度应变的实时测量。试验结果表明,该测量方法能够在一定程度上取代接触式引伸计检测方法,其测量精度达到±0.5%,能够满足实际应用的要求。
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The contact extensor is often used in metallic strain measurement,however,it has some defects such as it can not be used to test strain of a high temperature part,soft materials and whole process of metallic tensile test.To avoid these defects,using elliptic fitting technique,a non-contact real-time measurement system based on grid strain was established.The system wes developed and successfully applied to metallic tension to get the real-time measurement of length and width strain.Result shows that this method can replace the conventional method of using contact extensor to some degree and the measuring precision is up to ±5%,which can meet the practical requirement.
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作者简介：
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参考文献：
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