Imaging of Ultrasonic Guided Waves in Plate Based on Characteristic of Elliptical Cluster Tracks for Line-arc Kind of Array

Abstract

Abstract: There is an internal relationship among the line-arc kind of arrays(LAKA) including the regular lined arrays(LA), the arc arrays(AA) and the anomalous bessel arrays(BA), and the layout of the LAKA have much influence on imaging of ultrasonic guided waves. The LAKA and its foundation are discussed, the experimental system of imaging and testing of ultrasonic guided waves for LAKA are set up, and then both the LAKA and its characteristics of multichannel array signals are all analyzed. By expatiating the relationship between feature of LAKA and the characteristic of elliptical cluster tracks(CECT), the regulation of imaging resolution are proposed. The result of imaging experiment shows that synthesize aperture focusing based on CECT can be used into imaging and testing of ultrasonic guided waves for LAKA，which gray characteristics of image are in according with CECT. On condition of the same referenced LA for imaging of ultrasonic guided waves, the transverse imaging resolution of AA is higher than that of LA, the transverse imaging resolution of BA is higher than that of AA, and BA have the advantages like that of both LA and AA , which are in keep with the regulation of imaging resolution. The proposed research provides foundation for industrial imaging and testing of ultrasonic guided waves in plate with larger size.

Key words: Characteristic of elliptical cluster tracks, Imaging, Line-Arc kind of arrays, Ultrasonic guided waves

CLC Number:

TB553

ZHU Xinjie;HAN Zandong;DU Dong;CHEN Yifang;WANG Weibin;FENG Zhanjun. Imaging of Ultrasonic Guided Waves in Plate Based on Characteristic of Elliptical Cluster Tracks for Line-arc Kind of Array[J]. , 2012, 48(22): 14-20.

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Imaging of Ultrasonic Guided Waves in Plate Based on Characteristic of Elliptical Cluster Tracks for Line-arc Kind of Array

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