扭簧表(又叫扭簧测微仪)是一种精密的长度计量仪器,通常可采用高精度等级的块规来检定;例如分度值为万分之五毫米的高精度扭簧表用2等块规检定。分度值为万分之二毫米的高精度扭簧表用2等块规采用“成对法”进行检定。但是,由于一般工厂和地方计量室不一定具有如此高等级的块规;并且要求检定人员技术水平较高和严格的恒温条件,在用“成对法”检定时,数据处理又比较复杂,不易迅速准确地获得检定结果。一、检定装置我厂利用乌氏干涉仪的光管检定高精度扭簧表示值误差取得良好结果。如图一所示,将待检的高精度扭簧表1装在卧式光学计尾管支架孔内,乌氏干涉仪光管3装在卧 Torsion spring table (also known as torsion spring micrometer) is a precision length measuring instruments, usually using high-precision block gauge to test; for example, sub-ten thousandths of millimeters of precision torsion spring table 2 block block test. Dividing the value of two ten thousandths of millimeters of high-precision torsion spring table with 2 block rules using the “paired method” for testing. However, as the general factory and local metering rooms do not necessarily have such a high level of block gauges; and require a higher level of accreditation personnel and strict temperature conditions, using the “paired method” test, the data processing is more complicated and not easy Get results quickly and accurately. First, the test device I use the U-tube interferometer test tube high precision torsion spring said the value of the error to obtain good results. Shown in Figure 1, will be seized high-precision torsion spring table mounted in a hole in the horizontal optical meter tail pipe bracket, U-tube interferometer light pipe 3 installed in the lying