Waveguide damage detection by the matching pursuit approach employing the dispersion-based chirp functions

If the wave mode used in guided wave non-destructive inspection is dispersive, reflected pulses from damaged parts may be significantly distorted due to wave dispersion. The main concern, in this case, is how to detect the reflected pulses in noisy signals, and to extract meaningful damage informati...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2006-03, Vol.53 (3), p.592-605
Main Authors: Hong, Jin-Chul, Sun, Kyung Ho, Kim, Yoon Young
Format: Article
Language:English
Subjects:
Acoustics
Chirp
Damage
Data mining
Delay
Dispersion
Dispersion (wave)
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
General equipment and techniques
Group delay
Inspection
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Matching
Matching pursuit algorithms
Mathematical models
Measurement and testing methods
Nondestructive testing
Physics
Pursuit algorithms
Signal processing
Signal processing algorithms
Solid mechanics
Structural and continuum mechanics
Studies
Testing
Transducers
Ultrasonics, quantum acoustics, and physical effects of sound
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:If the wave mode used in guided wave non-destructive inspection is dispersive, reflected pulses from damaged parts may be significantly distorted due to wave dispersion. The main concern, in this case, is how to detect the reflected pulses in noisy signals, and to extract meaningful damage information from the detected pulses. However, current signal processing techniques used for guided wave inspection do not account for pulse dispersion, so the extracted information is often not so accurate. The objective of this study is to develop an efficient technique to deal with dispersed pulses for guided-wave nondestructive evaluation. Our idea is to model dispersed pulses by chirp functions of special form that can simulate up to quadratically varying group delay. To determine the parameters of the chirp functions approximating dispersed, reflected pulses, an adaptive matching pursuit algorithm is employed. Once the characterizing parameters are found, the damage location and extent can be estimated. The proposed method is tested with experimentally measured signals of longitudinal waves in a circular cylinder.
ISSN:0885-3010
1525-8955
0885-3010
DOI:10.1109/TUFFC.2006.1610568