Comparison of evaluating precision of straightness error between least square method and least envelope zone method[J]. Optics and precision engineering, 2007, 15(6): 889-893.
Comparison of evaluating precision of straightness error between least square method and least envelope zone method[J]. Optics and precision engineering, 2007, 15(6): 889-893.DOI:
The algorithm model and the realization method of evaluating straightness error in least squares method and least envelope zone method were introduced in detail. The experimental data of eight different kinds of straights were obtained on Coordinate Measuring Mechine(CMM). Then the measured data were evaluated by least square method and least envelope zone method based on search approximatioss (namely cut and try method in revolutionally). The experimental results indicate that the two methods are completely consistent and the evaluated result of straightness error by least square method conforms to the least condition.