摘要
本文论述步长联控式数据自动采集原理和数据处理方法,提出拟合直线与拟合曲线在联接点处保持连续与相切的一种实用方法,给出了与另外二种拟合方法的对比图形,列出了这三种不同回归方法的优缺点及适用范围.本方法已成功地应用于材料的拉伸试验、断裂韧性K_(IC)测试及σ_(0.2)系列(诸如σ_(0.1),σ_(0.5)等)的微机自动测试.
A new method about automatic data acquisitionnamed for "Steps-multiple controlling",is described in the paper.A wav to ensure continuity and tangent at the joint between afitting straight line and a fitting curve is also described. Thecontrast with other two methods of regression is given. Theachantages and disadvantages and applications of the three me-thods of regression are Stated. The methods have been used su-ccessfully for the material extension test, material fractureten-acity K_(IG) test and computer automatic measurement of σ_(0.2), σ_(0.1),σ_(0.05) Tests.
关键词
材料
力学性能
数据处理
曲线
拟合
Mechanical property test
Data handling
Computer applications Materials
