摘要
针对实验室宽度引伸计跟踪异常导致的r值波动,分析了机械式宽度引伸计在使用过程中产生r值异常的数据特点。采用线性拟合法拟合机械式宽度引伸计测量数据。通过导出试验机拉伸过程中宽度变形数据,拟合r值曲线。利用r值曲线公式减去拟合公式中Δb值方式消除机械引伸计测量误差。该方法结果通过和光学引伸计结果对比,准确性较高。
In view of the r-value fluctuation caused by the tracking abnormality of the width extensometer in the laboratory,the data characteristics of the r-value abnormality in the use of the mechanical width extensometer were analyzed.The linear fitting method was used to fit the measurement data of mechanical width extensometer.The curve of r-value was fitted by deriving the data of width deformation in the tensile process of testing machine.The measurement error of mechanical extensometer was eliminated by subtractingΔb value from r value curve formula.Compared with the results of optical extensometer,the accuracy of this method was higher.
作者
徐雁
孙志鹏
宋祖峰
XU Yan;SUN Zhi-peng;SONG Zu-feng(Technology Center,Maanshan Iron and Steel Co.,Ltd.,Ma'anshan 243000,China)
出处
《物理测试》
CAS
2020年第1期28-30,共3页
Physics Examination and Testing
关键词
r值
线性拟合
测量准确性
r-value
linear fitting
measurement accuracy
作者简介
徐雁(1970—),男,大学本科,技师,E-mail:xuyanmas@163.com
