3D Visualization Method for Complex Lattice Structure Defects in 3D Printing
WEN Yin-tang1,2,GAO Ting-ting1,2,ZHANG Yu-yan1,2
1. School of Electrical Engineering, Yanshan University, Qinhuangdao, Hebei 066004, China
2. Hebei Province Key Laboratory of Measuring and Testing Technologies and Instruments, Yanshan University, Qinhuangdao, Hebei 066004, China
Abstract Due to the complex lattice structure of 3D printing is prone to defects such as cracks, unfused or holes, and its seriously affect the functional performance of structural parts, a 3D visual inspection method for 3D printed defects in a complex lattice structure was studied. Based on gray value difference feature of internal defect in CT images of lattice structure, a class of defects were automatic identified and segmented by using the collective gray value method, and the segmented defect image sequence was 3D reconstructed by using ray-casting method. The experiment results showed that the method proposed can effectively obtained a three-dimensional view of a typical defect inside the lattice structure, and from which the shape and size of defect can be described. A strong basis for further analysis of the impact of defects on structural performance is provided.
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2020, Vol. 41 
