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Vol. 156, Issue 9, September 2013, pp. 168-175

 

Bullet

 

Three Dimensional Acoustical Imaging Based on Isosurface Technique for Bulk Material
 
1a He GUOCHAO, 1b Ding JINWEN, 2 V. M. LEVIN, 1a Dong LANFANG, 2 A. N. BOGACHENKOV, 3 Li KANG, 1c Yao CHUANMING, 2 K. V. ZAKUTAILOV,
2 Yu. S. PETRONYUK, 4 Li FENG, 2 E. S. MOROKOV

1a School of Computer Science and Technology; 1b CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering; 1c School of Nuclear Science and Technology, University of Science and Technology of China, 96 Jinzhai Road, Hefei, 230026, China

2 Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosyigina Street, Moscow, 119334, Russia

3 Anhui Province Coal Science Research Institute, 81 Xuancheng Road, Hefei, 230001, China

4 16th Research Institute of China Electronic Technology Group Corporation, 439 Suixi Road, Hefei, 230043, China
E-mail: jwding@ustc.edu.cn, jinwending@hotmail.com

 

Received: 26 June 2013   /Accepted: 25 August 2013   /Published: 30 September 2013

Digital Sensors and Sensor Sysstems

 

Abstract: The paper introduces the methods with time-resolved technique and isosurface display technique to get two- and three-dimensional (3D) acoustical imaging for scanning acoustic microscopy. Time-resolved technique presents the way to realize two-dimensional (2D) acoustical imaging - A- (O-), B- and C-scan, and a discrete combinatorial 3D image; and isosurface display technique realizes a 3D image with continuous distribution in full direction. The paper proposals a transitional model of square column, which consists of the data of echo signal pattern extracted from volume database, to construct the imaging cube and depict an isosurface using isovalue of internal boundaries in the cube, for the evaluation of internal defects in bulk specimen - Boron Nitride. 3D acoustical imaging has the advantage to show the position, size, appearance, distribution, and tendency of internal structures (voids, inclusions and defects) with complex shapes in non-transparent bulk material. The results show that 3D acoustical visualization presents more affluent, overall and intuitive pattern than 2D imaging for micro-sized structure investigation.

 

Keywords: Scanning Acoustic Microscope, Echo Signal Pattern, A-scan, B-scan, C-scan, Three Dimensional Acoustical Imaging, Isosurface Technique, Internal Defects, NDT/E, Boron Nitride.

 

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