论文部分内容阅读
光滑塞规直径尺寸既可在测长机、测长仪上直接测量又可进行比较测量。在直接测量中由于受环境温度和仪器本身示值误差的影响,当塞规直径尺寸较大时,测量准确度相对较低而且不同规格之间差异较大;如果采用比较测量,不确定度之间的差异相对较小。下面在温度为(20±0.5)℃、0.3℃/h条件下,用测量范围为
The diameter of the smooth gauge can not only be measured directly on the length measuring and measuring instrument, but also be compared and measured. In the direct measurement, due to the influence of the ambient temperature and the indication error of the instrument itself, the measurement accuracy is relatively low and the difference between different specifications is larger when the plug gauge is larger in diameter. If comparative measurement is used, the uncertainty The difference is relatively small. Under the temperature of (20 ± 0.5) ℃, 0.3 ℃ / h conditions, with the measurement range