Ultrasonic waveguide signal decomposition using the synchrosqueezed wavelet transform for modal group delay computation
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| Title: | Main Title: Ultrasonic waveguide signal decomposition using the synchrosqueezed wavelet transform for modal group delay computation |
| Description: | Abstract: Due to the modal behavior of geometrically bounded media, ultrasonic guided waves propagate in waveguides as a combination of multiple dispersive wave packets, which can be simulated as a PDE-problem. Given an excitation in time and space, multiple eigen-modes derived from solving the PDE may propagate each with different dispersion characteristics and weight. Considering a broad-band pulse exciting from one side of a hollow cylindrical waveguide, the received signal at the other side consists of all propagating eigen-modes that can be considered approximately as the narrow band signals. The synchrosqueezed wavelet transform (SWT) is employed to sharpen the time-frequency representation (TFR) of the received waveguide signal. Using a ridge detection algorithm, we successively separate the synchrosqueezed TFR into several narrow band TFRs which can be identified as oscillatory components with time-varying frequency. Then those separated TFRs are reconstructed as narrow band signals using the inverse SWT. Based on an analytical model of the waveguide, we observe that the decomposed signals are similar to those dominant eigen-modes simulated above. Moreover, also the group delay and, therefore, the group velocity of each decomposed signal can be estimated well. This is of high interest when analyzing the characteristic of a given waveguide, such as acoustical property measurements or non-destructive testing. |
| Identifier: | 10.1109/ULTSYM.2013.0173 (DOI) |
Responsible Party
| Creators: | Fabian Bause (Author), Boqiang Huang (Author), Bernd Henning (Author), Angela Kunoth (Author) |
| Publisher: | IIEEE |
| Publication Year: | 2014 |
Topic
| TR32 Topic: | Other |
| Related Subprojects: | C1, C7 |
| Subjects: | Keyword: Wavelet Transforms GEMET Thesaurus entry: mathematical analysis |
File Details
| Filename: | Bause_2013_ConfPaper_IEEE.pdf |
| Data Type: | Text - Event Paper |
| File Size: | 1.4 MB |
| Date: | Accepted: 21.07.2013 |
| Mime Type: | application/pdf |
| Data Format: | |
| Language: | English |
| Status: | Completed |
Constraints
| Download Permission: | Only Project Members |
| General Access and Use Conditions: | For internal use in TR32 only. |
| Access Limitations: | For internal use in TR32 only. |
| Licence: | [TR32DB] Data policy agreement |
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Specific Information - Publication
| Publication Status: | Peer-Reviewed |
| Review Status: | Peer reviewed |
| Publication Type: | Event Paper |
| Number of Pages: | 4 (671 - 674) |
| Event: | 2013 IEEE International Ultrasonics Symposium (IUS) |
| Event Type: | Conference |
| Event Location: | Prague, Czech Republic |
| Event Duration: | 21st of July, 2013 - 25th of July, 2013 |
Metadata Details
| Metadata Creator: | Angela Kunoth |
| Metadata Created: | 16.07.2014 |
| Metadata Last Updated: | 16.07.2014 |
| Subproject: | C1 |
| Funding Phase: | 2 |
| Metadata Language: | English |
| Metadata Version: | V50 |
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| Page Visits: | 864 |
| Metadata Downloads: | 0 |
| Dataset Downloads: | 2 |
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