Uncertainty analysis and precision assurance based on large diameter measurement by multiroller method

In this paper, main error sources and error transitive relationship in large diameter measurement by multi-roller method are analyzed completely. On the basis of uncertainty estimation, the temperature effect on the measurement precision of large diameter is emphatically discussed here. Temperature error correction and residual error after correction are studied and methods are presented to improve the effect of temperature error correction. Proper error allocation is introduced to guarantee that large diameter measurement precision can be significantly increased.