Qiufeng Li
Hangzhou HuaAn Nondestructive Testing Technology Co. Ltd., 310023, China
Gengsheng Luo
School of Mechanical and Electrical Engineering, Central South University, 410083, China
Guo Chen
Key Laboratory of Nondestructive Test (Nanchang Hangkong University), Ministry of Education, 330063, China
ABSTRACT
Being a promising approach in ultrasonic nondestructive testing (NDT) methods, synthetic aperture focusing technique (SAFT) subsequently focuses the data measured on an aperture to every point of the reconstructed imaging area through superposition of the time records. For validate the potential of this method, an experimental system is established to perform cross-surface scan of the test specimen, an SAFT processing program is used to give a 2D display of the inner structure of the specimen based on the measured backscattered ultrasonic signals. Two different concrete specimens were cast with embedded objects. Design of the inspection pulse, for example the pulse shape and central frequency is discussed. According to SAFT imaging algorithm, images of these concrete structure are pictured. Compared to original B-scan method, SAFT gives better imaging quality.
PDF References Citation
How to cite this article
Qiufeng Li, Gengsheng Luo and Guo Chen, 2013. Experimental Study of Ultrasonic SAFT Imaging for Concrete Structures. Information Technology Journal, 12: 7562-7567.
DOI: 10.3923/itj.2013.7562.7567
URL: https://scialert.net/abstract/?doi=itj.2013.7562.7567
DOI: 10.3923/itj.2013.7562.7567
URL: https://scialert.net/abstract/?doi=itj.2013.7562.7567
REFERENCES
- Chaix, J.F., V. Garnier and G. Corneloup, 2006. Ultrasonic wave propagation in heterogeneous solid media: theoretical analysis and experimental validation. Ultrasonics, 44: 200-210.
CrossRefDirect Link - Wu, F. and F.K. Chang, 2006. Debond detection using embedded piezoelectric elements in reinforced concrete structures-part I: Experiment. Struct. Health Monit., 5: 5-15.
CrossRef - Chaix, J.F., V. Garnier and G. Corneloup, 2003. Concrete damage evolution analysis by backscattered ultrasonic waves. NDT&E Int., 36: 461-469.
CrossRefDirect Link - Krause, M., M. Barmann, R. Frielinghaus, F. Kretzschmar and O. Kroggel et al., 1997. Comparison of pulse-echo methods for testing concrete. NDT&E int., 30: 195-204.
CrossRefDirect Link - Mustafa, K., L. Paichi and O. Matthew, 1995. Synthetic aperture imaging for small scale systems. IEEE Trans. Ultrason. Ferroelectr. Frequ Control, 42: 429-442.
CrossRefDirect Link - Phanidhar, A., S.W. Joshua and A.T. Joseph, 2001. Diffusion of ultrasound in concrete. Ultrasonics, 39: 429-435.
CrossRefDirect Link - Delsanto, P.P. and S. Hirsekorn, 2004. A unified treatment of nonclassical nonlinear effects in the propagation of ultrasound in heterogeneous media. Ultrasonics, 42: 1005-1010.
CrossRefDirect Link - Schickert, M., 2002. Ultrasonic NDE of concrete. IEEE Ultrason Symp., 1: 739-748.
CrossRefDirect Link - Schickert, M. and M. Krause, 2003. Ultrasonic imaging of concrete elements using reconstruction by synthetic aperture focusing technique. J. Mater. Civ. Eng., 15: 235-246.
CrossRef