Journal of Shanghai Jiaotong University ›› 2017, Vol. 51 ›› Issue (4): 393-.

Previous Articles     Next Articles

Measurement Uncertainty Evaluation on Circular Diameters Based on#br#  Error Ellipse Theory and Monte Carlo Method

ZHU Mengrui,WU Zhaoyong,WU Jian,DU Zhengchun,YANG Jianguo   

  1. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • Online:2017-04-03 Published:2017-04-03

Abstract:

Abstract: The measuring circle function of coordinate measuring machine (CMM) is studied and a new uncertainty evaluation model is established in the paper based on error ellipse theory and Monte Carlo method. The uncertainty of the sample points is expressed in the error ellipse. The paper uses the Monte Carlo method to get the uncertainty of diameter in circle fitted by the least square method. The method is more quickly as the less sample data involved.Comparison the experimental measure with the results by method proposed in the paper, it can draw a conclusion that the method can evaluate the diameter uncertainty accurately.

Key words: coordinate measuring machine (CMM), error ellipse, diameter, uncertainty, Monte Carlo method

CLC Number: