Method for measuring concentricity of a pipe

Abstract

The application discloses a kind of pipe concentricity measurement methods, first clamping to be measured pipe, spectrum confocal displacement sensor and measuring needle are moved to the inside and outside of the inside wall of the pipe to be measured at the set position respectively, and make the measurement direction of spectrum confocal displacement sensor and measuring needle coaxial, so, spectrum confocal displacement sensor and measuring needle correspond to the same radial direction with the two points of the inside wall and the outside wall of the pipe to be measured at the same time measurement;Then rotate the pipe to be measured, utilize spectrum confocal displacement sensor can gather the distance data of the inside wall circumferential direction of the pipe to be measured and obtain distance data set D in , while differential transformer type displacement sensor measurement obtains the displacement curve of measuring needle in the process of the pipe to be measured rotating a circle, displacement data set D is constructed from the displacement data of the displacement curve selected at the corresponding radial position point of distance data;Finally, the concentricity of the pipe to be measured is calculated using distance data set D in And displacement data set D.

Images