NDLI: Tomographic diagnosis of defects in hydraulic concrete structure

Content Provider	Springer Nature Link
Author	Zhao, Mingjie Xu, Xibin
Copyright Year	2008
Abstract	The ultrasonic tomographic technology is applied to diagnose the defects in hydraulic concrete structure. In order to improve the precision of diagnoses, the wavelet transformation is used in the processing of ultrasonic signals. The influences of water, scale and orientation of defect, processing methods and theoretical model on image resolution are investigated. The experimental results indicate that the result of the tomographic diagnosis of a single defect is sensitive and the boundary can be clearly determined. However, the image resolution of multiple defects is not satisfactory. The water content and scale of a defect may significantly affect the imaging resolution. Defects with the orientation perpendicular to the direction of the diagnosis may have higher precision in diagnosing. The wavelet transformation technology can elevate the imaging resolution. The applied calculation model plays a very important role in improving the accuracy of detection.
Starting Page	226
Ending Page	232
Page Count	7
File Format	PDF
ISSN	16737407
Journal	Frontiers of Architecture and Civil Engineering in China
Volume Number	2
Issue Number	3
e-ISSN	16737512
Language	English
Publisher	SP Higher Education Press
Publisher Date	2008-07-15
Publisher Institution	Chinese Universities
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	concrete defect diagnoses ultrasonic tomographic technology resolution of imaging wavelet transformation Cities, Countries, Regions Civil Engineering
Content Type	Text
Resource Type	Article
Subject	Architecture Civil and Structural Engineering

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