Abstract
As a kind of portable three-coordinate, the comparator is playing an more and more important role in precision industry measurement. Therefore, it is of great scientific significance and obvious socioeconomic benefits to carry out the research of comparator. This paper was based on rich experience with the institute in the field of the geometric measurement technology for a long time. And the measurement uncertainty of the instrument has been researched. The uncertainty of the diameter indication error is U=1.2μm k=2, the uncertainty of roundness indication error is U=1.4μm k=2, the uncertainty of sphere-center distance error is U=1.5μm+7.2×10−6 L k=2 L:m, and the uncertainty of length indication error is U=1.2μm+1.5×10−6 L k=2 L:m.
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