A conoscopic holography-based 3D measurement system for analyzing defects in steel plate surface

摘要

A conoscopic holography-based 3D measurement system for analyzing the defects on the surface of steel plates was introduced in this paper.The hardware,which is automated through software,performs sampling of the steel plate surface.Through the software interface,point-cloud data of the steel plate surface are obtained and reconstructed to form a3D image of the steel plate surface.The software allows automatic analysis of steel plate surface defects through identification of the bulges and depressions.In addition,the software can also automatically calculate the defect information,such as the deepest point,volume,opening area,opening length,and so on,thereby determining the defect size.The results determined by this 3D measurement system were found to be in good agreement with the actual values.