| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for measuring the profile of a cylinder using a device of a simple structure, capable of precisely measuring a three-dimensional profile without being affected by the motion error during rotation of a cylinder to be measured nor a position attitude error of a displacement detector caused by deformation of a guide rail. SOLUTION: Three, two, and one of six, at least, displacement detectors S1-S6 are respectively disposed on the outer periphery of three cross sections which is perpendicular to the axis, spaced by constant interval d, in the axial direction of a cylinder 1 to be measured. Each of the displacement detectors S1-S6 is dislocated in detection angle from each other and arranged in the radial direction of the cylinder 1. While the cylinder 1 is rotated, the displacement data are collected simultaneously by shifting, by the interval d, in the axial direction while the relative position among the displacement detectors S1-S6 is kept. Based on the displacement data, a roundness and average radius at each cross section are acquired and an eccentricity at each cross section that corresponds to the bending of each center axis is also acquired. The results are synthesized to measure a three-dimensional profile. COPYRIGHT: (C)2004,JPO&NCIPI
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