Array focused Lamb wave Hilbert holographic imaging method. Issue 4 (16th February 2023)

• Record Type: Journal Article
• Authors: Lang, Yan-Feng; Tian, Shao-Hua; Yang, Zhi-Bo; Sun, Ruo-Bin; Zhang, Wei; Kong, De-Tong; Chen, Xue-Feng
• Is Part Of: Mechanics of advanced materials and structures. Volume 30:Issue 4(2023)
• Page Start: 661
• Page End: 675
• Publication Date: 2023-02-16
• Subjects: Lamb wave -- damage localization -- total focusing -- amplitude imaging -- phase imaging -- Hilbert holographic imaging; Composite materials -- Mechanical properties -- Periodicals; Composite construction -- Periodicals; 620.118
• DOI: 10.1080/15376494.2021.2022255
• Languages: English
• ISSNs: 1537-6494

Abstract

Abstract: Piezoelectric Transducer(PZT) plays a significant role for intelligent materials and structures for its better coupling compatibility with structures. The amplitude imaging is easily influenced by the grating and side lobes, while the phase imaging is disturbed by several random single-pixel highlighted spots. Considering that the combination of the amplitude and phase information, which can be acquired simultaneously by Hilbert transform, could introduce higher robustness and accurateness of damage detection, the array focused Hilbert holographic imaging method for Lamb wave is proposed. A0 mode and S0 mode are also combined to detect surface and inner defects through the logical operation.