GPR measurement of the diameter of steel bars in concrete specimens based on the stationary wavelet transform
Ground penetrating radar (GPR) is a valuable nondestructive method for detecting steel bars in reinforced concrete structures. Measuring the diameter of the steel bars is difficult and few previous experiments have been successful. We compare the difference of discrete wavelet transform
(DWT) and stationary wavelet transform (SWT) and make the contour map of SWT detail coefficients, then find that SWT is an effective method to measure the diameter of steel bar. We also discuss our choice of the wavelet basis that best interprets the raw GPR data.
Keywords: Concrete; Diameter; Ground penetrating radar (GPR); Stationary wavelet transform; Steel bar
Document Type: Research Article
Affiliations: 1 Department of Civil Engineering, Xinyang Normal University. His research interests include non-destructive evaluation and test techniques application in civil engineering.
Publication date: 01 March 2009
- Official Journal of The British Institute of Non-Destructive Testing - includes original research and development papers, technical and scientific reviews and case studies in the fields of NDT and CM.
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