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| Research Progress in Damage Diagnostic Imaging of Aerospace Structures Based on Ultrasonic Guided Waves |
| ZHENG Yuebin1 , WU Zhanjun1 , LEI Zhenkun1 , GAO Dongyue2 , ZHOU Kai1 , ZHANG Jiaqi1 , YANG Zhengyan1 , ZOU Jianchao1 |
| (1. State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China; 2. School of Aeronautics and Astronautics, Sun Yat-Sen University, Guangzhou 510275, China) |
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Abstract Damage diagnostic imaging approach based on ultrasonic guided waves (UGW) is a research hotspot in the fields of non-destructive testing and structural health monitoring, which can directly reflect the damage location and severity on aerospace structures. This paper summarizes the general process of UGW diagnostic imaging technology, introduces the research status of eight representative imaging algorithms, including phased array imaging, space-wave number filter imaging, inverse-time migration imaging, time reversal imaging, delay-and-sum imaging, model-based imaging, tomographic imaging and probabilistic-based imaging, and compares the application scope, advantages and disadvantages of these imaging algorithms. Then, the challenge and development trend of UGW diagnostic imaging technology are discussed according to the actual industrial application.
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2020, 
