目前,国内大多数材料试验机都比较陈旧,无等应变速度单向拉伸的自控系统。本文介绍一种在老的试验机上配置常规仪器、以进行等应变速度单向拉仲的系统。介绍此系统的原理、仪器的选择和调试方法,还结合超塑性拉伸试验对这种系统进行具体说明。此系统操作简单,成本低,能满足一般试验的精度要求。 At present, most of the domestic material testing machines are relatively old, without strain control system of uniaxial tension strain. This article describes a system that is equipped with conventional instruments on an old testing machine for unidirectional pull-up at constant strain rate. Introduce the principle of this system, the instrument selection and debugging methods, and also combine the superplastic tensile test to explain the system. The system is simple, low cost, to meet the accuracy requirements of the general test.