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Proceedings Paper

Computer interpretation of ultrasonic pulse-echo signals for concrete dams
Author(s): Richard Haskins; A. Michel Alexander
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Paper Abstract

The nation's failing infrastructure points to the need to develop new techniques and equipment for the diagnostic evaluation of concrete in locks, dams, bridges, pavements, etc. An ultrasonic pulse echo (UPE) system for the non-destructive testing of concrete structures was developed at the U.S. Army Corps of Engineers, Waterways Experiment Station (WES) in the late 1980s. Because of the overwhelming amount of information in ultrasonic pulse echo (UPE) signals from concrete, learning to interpret raw data can be confusing. Although a human has the ability to recognize and calculate the complex signal information it can take months or years to master interpretation. The application of digital signal processing (DSP) algorithms for computerized signal interpretation can help reduce these problems. Computer processing of signals is also needed so that there is less dependency on highly experienced personnel and more objective diagnostic decisions can be made. This paper explores several DSP techniques aimed at computer interpretation. Three techniques were investigated: split- spectrum processing (SSP), ray-based modeling (RAM), and artificial neural networks (ANN).

Paper Details

Date Published: 12 May 1995
PDF: 13 pages
Proc. SPIE 2457, Nondestructive Evaluation of Aging Structures and Dams, (12 May 1995); doi: 10.1117/12.209401
Show Author Affiliations
Richard Haskins, U.S. Army Corps of Engineers Waterways Experiment Station (United States)
A. Michel Alexander, U.S. Army Corps of Engineers Waterways Experiment Station (United States)

Published in SPIE Proceedings Vol. 2457:
Nondestructive Evaluation of Aging Structures and Dams
Soheil Nazarian; Larry D. Olson, Editor(s)

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