Offset compensation cable external diameter measurement system

Abstract

In the process of industrial production cables and pipes, the precise measurement of the produced product line diameter parameters is very important. In the present paper, we propose an offset compensation diameter measurement system based on analytical geometry and spatial coordinate transformation. The right-angle coordinate system is established in the corresponding planes of the two sets of charge coupling devices and the corresponding laser light source, and the center coordinates of the measured cable are obtained by the analytical geometric method, and the spatial coordinate transformation is used to connect the two coordinate systems to build the offset compensation measurement system. In the actual test (taking θ=45° as an example), considering the overall measurement results of the cylinder standard bar, the overall absolute error is between ± 4 μm without offset, and the relative error is 0~0.05%; and the relative average error (deviation angle is more than 0° and less than 35°) can be maintained at less than 0.7%. The above results demonstrate the feasibility of accurate measurement of this offset-compensated measurement system.