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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 |
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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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Received: 20 September 2019
Published: 28 August 2020
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Corresponding Authors:
Yu-yan ZHANG
E-mail: yyzhang@ysu.edu.cn
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