GB/T 2523-2008要求接触式表面粗糙度仪的触针移动速度一般为0.5 mm ·s^-1，为提高接触式表面粗糙度仪的触针移动速度从而缩短表面粗糙度的检测周期、提高检测效率，开展了专项对比试验，分析了试验速度对表面平均粗糙度R_a和峰值数PPI测试结果的影响。结果表明：R_a为0.6~1.6 μm的试样，试验速度为1.0 mm ·s^-1和1.5 mm ·s^-1时测得的R_a和PPI与试验速度为0.5 mm ·s^-1时测得的没有显著性差异；当试验速度增大为2.0 mm ·s^-1时，测得的R_a和PPI与试验速度为0.5 mm ·s^-1时测得的存在显著性差异。

In GB/T 2523-2008, the moving speed of the contact surface roughness meter is generally 0.5 mm ·s^-1. In order to improve the moving speed of the contact surface roughness meter, shorten the detection period of the surface roughness and improve the detection efficiency, special comparative tests were carried out. The effects of test speeds on the test results of average surface roughness R_a and peak count PPI were analyzed. The results show that for the samples with the surface roughness in the range of 0.6-1.6 μm, there is no significant difference between the measured R_a and PPI at test speeds of 1.0 mm ·s^-1 and 1.5 mm ·s^-1 and at test speed of 0.5 mm ·s^-1, but when the test speed increased to 2.0 mm ·s^-1, there is a significant difference between the measured R_a and PPI when the test speed is 0.5 mm ·s^-1.