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Proceedings Paper

Ultrasonic damage detection of concrete structures by using pulse-echo sensor arrays and SAFT
Author(s): Li-hua Shi; Zhi-xue Shao; Zhe Shao
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Paper Abstract

In ultrasonic nondestructive testing (NDT) of concrete structures, the synthetic aperture focusing technique (SAFT) can improve the resolution of target and therefore gives a better image display of the B-scan data. In traditional B-scan of concrete structures the ultrasonic transducers are usually moved manually to detect the whole structure, the detection speed and the consistency in different test points are greatly affected. A PZT sensor array is designed in this paper to perform B-scan on large concrete structures more efficiently. The excitation of the sensor array and the data processing techniques for the array data are discussed. A signal processing approach is proposed to improve the consistency between different test channels in the array. Experiments on real structures show the embedded objects can be located accurately by using the array sensor and SAFT method.

Paper Details

Date Published: 20 October 2009
PDF: 6 pages
Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 749312 (20 October 2009); doi: 10.1117/12.840238
Show Author Affiliations
Li-hua Shi, Nanjing Engineering Institute (China)
Zhi-xue Shao, Nanjing Engineering Institute (China)
Zhe Shao, Nanjing Engineering Institute (China)

Published in SPIE Proceedings Vol. 7493:
Second International Conference on Smart Materials and Nanotechnology in Engineering
Jinsong Leng; Anand K. Asundi; Wolfgang Ecke, Editor(s)

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