目前，利用正交光栅作为应变传感器来测量金属材料的应变引起了人们的兴趣，本文将光栅衍射方程推广应用到金属材料应变测量中，借助ＬＣＣＤ等硬件测试系统及相应的数据采集与处理系统，实时、准确测量了金属材料的应变 At present, the use of orthogonal grating as a strain sensor to measure the strain of metallic materials has aroused people’s interest. In this paper, the grating diffraction equation is extended to strain measurement of metallic materials. With the aid of LCCD and other hardware testing systems and corresponding data acquisition and processing systems, Real-time, accurate measurement of the strain of metal materials