Multi-mirror aided digital image correlation for internal and external panoramic deformation measurement
An attitude-variable multi-mirror assisted digital image correlation method was developed to achieve panoramic topography and deformation measurements on both the inside and outside of tubular structures in this paper.The measurement system consists of a coaxial imaging system,three optical mirrors with adjustable attitudes,and the required cold light source.By adjusting the reflector's position and angle,the camera is able to capture images of both the inner and outer walls of the pipeline simultaneously.Furthermore,the coaxial acquisition system ensures that every tested domain is observable by both cameras.After completing the correlation calculations and converting the coordinates,the panoramic 3D shape and deformation distribution of both the internal and external walls can be obtained.The accuracy and efficiency of the proposed method are demonstrated through validation experiments.
panoramic measurementdigital image correlationdeformation of internal and external walls
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