Patent ID: 7313263
Filing Date: 2007-12-25
Classification: G01B,G06T

Abstract:
1. A method for measuring a coaxial relation for a measuring object, which comprises: a first mechanical part having a first axial line as a reference line; and a second mechanical part having a second axial line, wherein a coaxial relation of the second axial line is measured with respect to the reference line, wherein the measuring method comprises: a first shooting step for shooting a shape of the first mechanical part at multiple measuring points which are displaced in the first axial line, to obtain first image information of the shapes at those measuring points; a first coordinate calculation step for respectively calculating first center coordinates of the detected shape from the first image information; a first axial line calculation step for calculating a position of the first axial line from the calculated first center coordinates; a second shooting step for shooting a shape of the second mechanical part at multiple measuring points which are displaced in the second axial line, to obtain second image information of the shapes at those measuring points; a second coordinate calculation step for respectively calculating second center coordinates of the detected shape from the second image information; a second axial line calculation step for calculating a position of the second axial line from the calculated second center coordinates; and a step of determining the coaxial relation by comparing the calculated position of the second axial line with the calculated position of the first axial line in a determination area.