Roundness error evaluation algorithm based on polar coordinate transform

Xianqing Lei

doi:10.1016/j.measurement.2010.10.007

Roundness error evaluation algorithm based on polar coordinate transform

2011-02-01

49

PRE

AI

X

Xianqing Lei *

张春阳 (Chun-Yang Zhang)

J

Jishun Li

DOI：10.1016/j.measurement.2010.10.007

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A new method for roundness error evaluation using polar coordinate system, named as polar coordinate transform algorithm (PCTA), was presented in this paper. The algorithm first allocates a circular region around the least square circle center following certain rules, then calculates the polar radius for all measured points by translating polar coordinate system to each point in the region in turn, and finally obtains minimum circumscribed center point, maximum inscribed center point and minimum zone center point from comparing each polar radius relative to each polar coordinate system. With accurate center point, the algorithm could give more accurate roundness evaluation. In the paper, the process of PTA was described in detail including the algorithm formula and flowchart. Theoretical calculation and testing results show that PCTA can evaluate roundness error effectually and accurately. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.

Keyword:

Roundness

Error evaluation

Coordinate transform

Minimum zone

Roundness error evaluation algorithm based on polar coordinate transform

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