一、仪器工作原理研制一种与普通拉力试验机配套使用的简易装置,以便迅速精确地测定屈服强度,是一项很有工程实用价值的课题。根据从试样总伸长量中检测出非比例伸长量而直读出屈服负荷值的原理〔1〕,研制成功的一种新型屈服强度快速测定仪,使用操作简便,测试效率高,测量精度符合国际标准的规定〔2〕。仪器的输入信号来源于 First, the working principle of the instrument Developed a simple device supporting the use of ordinary tensile testing machine in order to quickly and accurately determine the yield strength, is a project of great practical value. According to the total elongation from the specimen to detect the non-proportional elongation and direct read yield load principle 〔1〕, the successful development of a new fast yield strength tester, the use of simple, efficient test, measurement Accuracy in line with international standards [2]. Instrument input signal from