| 摘要 |
PROBLEM TO BE SOLVED: To provide a segment circularity measurement device that can acquire circularity of a segment ring with high accuracy even when a revolution center of an erector revolving part is eccentric.SOLUTION: A segment circularity measurement device 100 includes: an encoder 50 that detects a revolution angle of an erector device whose revolution center is eccentric; four distance meters 41-44 that are arranged in the erector device at angle positions different from each other, and measure a distance to the inner surface of a segment ring in which segments are assembled into a ring shape; and a control part 31 that corrects positional deviation due to eccentricity of the revolution center of the erector device on the basis of the angle detected by the encoder 50 and the distance measured by the four distance meters 41-44. |
