【Key words】 CMM； precision verification； one-dimensional ball row； method of combination calibration； uncertainty；
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在CNC机床和三坐标测量机精度检定中，通常采用一些实物作为基准。
There are some objects used as reference in precision verification of CNC machine tool and CMM.
分析了数字水准仪系统的误差源，阐述了仪器i角误差和综合精度的检定方法。
In this paper, errors of digital levels are introduced. Calibration methods of the collimation error and the system accuracy are presented.
本文提出了通过系统设计的方法将频率捷变雷达综合测试仪频率跟踪精度的检定在中频进行。
The system design method proposed by the paper examines the frequency tracking accuracy of the frequency agile radar synthesis detection unit at intermediate frequency.
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