Abstract
Acoustic Emißion phenomenon is of great importance for analyzing and monitoring health status of critical structural components. In acoustic emißion, elastic waves generated by sources propagate through the structure and are acquired by networks of sensors. Ability to accurately locate the event strongly depends on the type of medium (e.g. geometrical features) and material properties, that result in wave signals distortion. These effects manifest themselves particularly in plate structures due to intrinsic dispersive nature of Lamb waves. In this paper two techniques for acoustic emißion source localization in elastic plates are compared: one based on a time-domain distance transform and the second one is a two-step hybrid technique. A time-distance domain transform approach, transforms the time-domain waveforms into the distance domain by using wavenumber-frequency mapping. The transform reconstructs the source signal removing distortions resulting from dispersion effects. The method requires input of approximate material properties and geometrical features of the structure that are relatively easy to estimate prior to measurement. Hence, the method is of high practical interest. Subsequently, a two-step hybrid technique, which does not require apriori knowledge of material parameters, is employed. The method requires a setup of two predefined clusters of three sensors in each. The Lamb wave source is localized from the intersection point of the predicted wave propagation directions for the two clusters. The second step of the two-step hybrid technique improves the prediction by minimizing an objective function. The two methods are compared for analytic, simulated and experimental signals.
| Original language | English (US) |
|---|---|
| Title of host publication | Proceedings of SPIE - The International Society for Optical Engineering |
| Publisher | SPIE |
| Volume | 9438 |
| ISBN (Print) | 9781628415414 |
| DOIs | |
| State | Published - 2015 |
| Event | Health Monitoring of Structural and Biological Systems 2015 - San Diego, United States Duration: Mar 9 2015 → Mar 12 2015 |
Other
| Other | Health Monitoring of Structural and Biological Systems 2015 |
|---|---|
| Country | United States |
| City | San Diego |
| Period | 3/9/15 → 3/12/15 |
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Keywords
- Acoustic EMIßion
- Acoustic emißion source localization
- Time-distance domain transform
ASJC Scopus subject areas
- Applied Mathematics
- Computer Science Applications
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
Cite this
Distance-domain based localization techniques for acoustic emißion sources : A comparative study. / Grabowski, Krzysztof; Gawronski, Mateusz; Nakatani, Hayato; Packo, Pawel; Baran, Ireneusz; Spychalski, Wojciech; Staszewski, Wieslaw J.; Uhl, Tadeusz; Kundu, Tribikram.
Proceedings of SPIE - The International Society for Optical Engineering. Vol. 9438 SPIE, 2015. 94381T.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Distance-domain based localization techniques for acoustic emißion sources
T2 - A comparative study
AU - Grabowski, Krzysztof
AU - Gawronski, Mateusz
AU - Nakatani, Hayato
AU - Packo, Pawel
AU - Baran, Ireneusz
AU - Spychalski, Wojciech
AU - Staszewski, Wieslaw J.
AU - Uhl, Tadeusz
AU - Kundu, Tribikram
PY - 2015
Y1 - 2015
N2 - Acoustic Emißion phenomenon is of great importance for analyzing and monitoring health status of critical structural components. In acoustic emißion, elastic waves generated by sources propagate through the structure and are acquired by networks of sensors. Ability to accurately locate the event strongly depends on the type of medium (e.g. geometrical features) and material properties, that result in wave signals distortion. These effects manifest themselves particularly in plate structures due to intrinsic dispersive nature of Lamb waves. In this paper two techniques for acoustic emißion source localization in elastic plates are compared: one based on a time-domain distance transform and the second one is a two-step hybrid technique. A time-distance domain transform approach, transforms the time-domain waveforms into the distance domain by using wavenumber-frequency mapping. The transform reconstructs the source signal removing distortions resulting from dispersion effects. The method requires input of approximate material properties and geometrical features of the structure that are relatively easy to estimate prior to measurement. Hence, the method is of high practical interest. Subsequently, a two-step hybrid technique, which does not require apriori knowledge of material parameters, is employed. The method requires a setup of two predefined clusters of three sensors in each. The Lamb wave source is localized from the intersection point of the predicted wave propagation directions for the two clusters. The second step of the two-step hybrid technique improves the prediction by minimizing an objective function. The two methods are compared for analytic, simulated and experimental signals.
AB - Acoustic Emißion phenomenon is of great importance for analyzing and monitoring health status of critical structural components. In acoustic emißion, elastic waves generated by sources propagate through the structure and are acquired by networks of sensors. Ability to accurately locate the event strongly depends on the type of medium (e.g. geometrical features) and material properties, that result in wave signals distortion. These effects manifest themselves particularly in plate structures due to intrinsic dispersive nature of Lamb waves. In this paper two techniques for acoustic emißion source localization in elastic plates are compared: one based on a time-domain distance transform and the second one is a two-step hybrid technique. A time-distance domain transform approach, transforms the time-domain waveforms into the distance domain by using wavenumber-frequency mapping. The transform reconstructs the source signal removing distortions resulting from dispersion effects. The method requires input of approximate material properties and geometrical features of the structure that are relatively easy to estimate prior to measurement. Hence, the method is of high practical interest. Subsequently, a two-step hybrid technique, which does not require apriori knowledge of material parameters, is employed. The method requires a setup of two predefined clusters of three sensors in each. The Lamb wave source is localized from the intersection point of the predicted wave propagation directions for the two clusters. The second step of the two-step hybrid technique improves the prediction by minimizing an objective function. The two methods are compared for analytic, simulated and experimental signals.
KW - Acoustic EMIßion
KW - Acoustic emißion source localization
KW - Time-distance domain transform
UR - http://www.scopus.com/inward/record.url?scp=84943327987&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84943327987&partnerID=8YFLogxK
U2 - 10.1117/12.2084296
DO - 10.1117/12.2084296
M3 - Conference contribution
AN - SCOPUS:84943327987
SN - 9781628415414
VL - 9438
BT - Proceedings of SPIE - The International Society for Optical Engineering
PB - SPIE
ER -