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一、引言关于高速试验机,无论是国内还是国外,在测量方面过去都是用示波器显示,用照相机照相的办法做记录。这种办法的测量精度是很低的。如果使用计算机那当然可以,不过一般的采样速度较慢的计算机也是不能满足要求的,必须对采样速度较高的计算机才行。使用高速模数转换器把负荷及变形的模拟量变成数字量,用计算机把这些数字信息存储起来,再用计算机把这些数字信息还原成原来的模拟量,通过慢读时钟控制把它缓慢的接入x—y 函数记录仪,记录仪再绘出应力～应变曲线,这是完全可以做到的。
I. INTRODUCTION As for the high-speed testing machine, no matter at home or abroad, the past is all displayed by the oscilloscope in terms of measurement and recorded by camera. The measurement accuracy of this method is very low. Of course, if you use a computer, but the general slow sampling of the computer can not meet the requirements must be sampling speed of the computer Caixing. Use of high-speed analog-digital converter to load and deformation of the analog into digital, the computer to store these digital information, then the computer to restore these digital information into the original analog, slow read clock control slowly Access x-y function recorder, recorder and then draw the stress ~ strain curve, which is entirely possible.