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JC-1型精密测角仪的精度很高,其一次测量平面角的不确定度为≤0.20″。以往测最测角仪的不确定度用分项测定法,即分别测出长周期误差、细分误差和随机误差,进而合成为不确定度。作者采用了一种综合测定法,即用17、23面棱体以排列互比法测出测角仪的系统误差和随机误差,然后用方和根法计算出不确定度。本文介绍了测定、计算和验证的方法,列举了比对的数据。
JC-1-type precision goniometer accuracy is high, the uncertainty of a measurement of plane angle ≤ 0.20 ". In the past measured the most goniometer uncertainty using sub-measurement method, which were measured long-period error , Subdivision error and random error, and then synthesized into an uncertainty.The author uses a comprehensive determination method, that is, with the 17,23 faceted prism to arrange the mutual ratio method to determine the goniometer system error and random error, and then The square root method is used to calculate the uncertainty.This paper introduces the methods of measurement, calculation and verification, and lists the data of comparison.