Technique to combine images produced by different propagation modes of guided waves for damage detection and contrast improvement in plate-like structures
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1109/ULTSYM.2012.0360 http://hdl.handle.net/11449/73834 |
Resumo: | This paper describes an image compounding technique based on the use of different apodization functions, the evaluation of the signals phases and information from the interaction of different propagation modes of Lamb waves with defects for enhanced damage detection, resolution and contrast. A 16 elements linear array is attached to a 1 mm thickness isotropic aluminum plate with artificial defects. The array can excite the fundamental A0 and S0 modes at the frequencies of 100 kHz and 360 kHz, respectively. For each mode two synthetic aperture (SA) images with uniform and Blackman apodization and one image of Coherence Factor Map (CFM) are obtained. The specific interaction between each propagation mode and the defects and the characteristics of acoustic radiation patterns due to different apodization functions result in images with different resolution and contrast. From the phase information one of the SA images is selected at each pixel to compound the final image. The SA images are multiplied by the CFM image to improve contrast and for the dispersive A0 mode it is used a technique for dispersion compensation. There is a contrast improvement of 47.5 dB, reducing the dead zone and improving resolution and damage detection. © 2012 IEEE. |
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Repositório Institucional da UNESP |
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spelling |
Technique to combine images produced by different propagation modes of guided waves for damage detection and contrast improvement in plate-like structuresAcoustic radiationApodization functionArtificial defectsCompounding techniquesContrast improvementsDifferent resolutionsPlate-like structureSpecific interactionDamage detectionDefectsPlates (structural components)This paper describes an image compounding technique based on the use of different apodization functions, the evaluation of the signals phases and information from the interaction of different propagation modes of Lamb waves with defects for enhanced damage detection, resolution and contrast. A 16 elements linear array is attached to a 1 mm thickness isotropic aluminum plate with artificial defects. The array can excite the fundamental A0 and S0 modes at the frequencies of 100 kHz and 360 kHz, respectively. For each mode two synthetic aperture (SA) images with uniform and Blackman apodization and one image of Coherence Factor Map (CFM) are obtained. The specific interaction between each propagation mode and the defects and the characteristics of acoustic radiation patterns due to different apodization functions result in images with different resolution and contrast. From the phase information one of the SA images is selected at each pixel to compound the final image. The SA images are multiplied by the CFM image to improve contrast and for the dispersive A0 mode it is used a technique for dispersion compensation. There is a contrast improvement of 47.5 dB, reducing the dead zone and improving resolution and damage detection. © 2012 IEEE.Faculdade de Engenharia de Ilha Solteira Universidade Estadual Paulista, Ilha Solteira-SP (15385-000)Centro de Acústica Aplicada y Evaluación No-Destructiva Consejo Superior de Investigaciones Cientficas, MadridEscola Politécnica Universidade de São Paulo, São Paulo-SP 05508-030Faculdade de Engenharia de Ilha Solteira Universidade Estadual Paulista, Ilha Solteira-SP (15385-000)Universidade Estadual Paulista (Unesp)Consejo Superior de Investigaciones CientficasUniversidade de São Paulo (USP)Prado, Vander Teixeira [UNESP]Higuti, Ricardo Tokio [UNESP]Kitano, Claudio [UNESP]Martinez-Graullera, OscarAdamowski, Julio Cezar2014-05-27T11:27:18Z2014-05-27T11:27:18Z2012-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObject1441-1444http://dx.doi.org/10.1109/ULTSYM.2012.0360IEEE International Ultrasonics Symposium, IUS, p. 1441-1444.1948-57191948-5727http://hdl.handle.net/11449/7383410.1109/ULTSYM.2012.03602-s2.0-84882430610640533951088320328834403518951670000-0003-4201-56170000-0001-6320-755XScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengIEEE International Ultrasonics Symposium, IUS0,264info:eu-repo/semantics/openAccess2024-07-04T19:11:50Zoai:repositorio.unesp.br:11449/73834Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:55:06.230720Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Technique to combine images produced by different propagation modes of guided waves for damage detection and contrast improvement in plate-like structures |
title |
Technique to combine images produced by different propagation modes of guided waves for damage detection and contrast improvement in plate-like structures |
spellingShingle |
Technique to combine images produced by different propagation modes of guided waves for damage detection and contrast improvement in plate-like structures Prado, Vander Teixeira [UNESP] Acoustic radiation Apodization function Artificial defects Compounding techniques Contrast improvements Different resolutions Plate-like structure Specific interaction Damage detection Defects Plates (structural components) |
title_short |
Technique to combine images produced by different propagation modes of guided waves for damage detection and contrast improvement in plate-like structures |
title_full |
Technique to combine images produced by different propagation modes of guided waves for damage detection and contrast improvement in plate-like structures |
title_fullStr |
Technique to combine images produced by different propagation modes of guided waves for damage detection and contrast improvement in plate-like structures |
title_full_unstemmed |
Technique to combine images produced by different propagation modes of guided waves for damage detection and contrast improvement in plate-like structures |
title_sort |
Technique to combine images produced by different propagation modes of guided waves for damage detection and contrast improvement in plate-like structures |
author |
Prado, Vander Teixeira [UNESP] |
author_facet |
Prado, Vander Teixeira [UNESP] Higuti, Ricardo Tokio [UNESP] Kitano, Claudio [UNESP] Martinez-Graullera, Oscar Adamowski, Julio Cezar |
author_role |
author |
author2 |
Higuti, Ricardo Tokio [UNESP] Kitano, Claudio [UNESP] Martinez-Graullera, Oscar Adamowski, Julio Cezar |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Consejo Superior de Investigaciones Cientficas Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Prado, Vander Teixeira [UNESP] Higuti, Ricardo Tokio [UNESP] Kitano, Claudio [UNESP] Martinez-Graullera, Oscar Adamowski, Julio Cezar |
dc.subject.por.fl_str_mv |
Acoustic radiation Apodization function Artificial defects Compounding techniques Contrast improvements Different resolutions Plate-like structure Specific interaction Damage detection Defects Plates (structural components) |
topic |
Acoustic radiation Apodization function Artificial defects Compounding techniques Contrast improvements Different resolutions Plate-like structure Specific interaction Damage detection Defects Plates (structural components) |
description |
This paper describes an image compounding technique based on the use of different apodization functions, the evaluation of the signals phases and information from the interaction of different propagation modes of Lamb waves with defects for enhanced damage detection, resolution and contrast. A 16 elements linear array is attached to a 1 mm thickness isotropic aluminum plate with artificial defects. The array can excite the fundamental A0 and S0 modes at the frequencies of 100 kHz and 360 kHz, respectively. For each mode two synthetic aperture (SA) images with uniform and Blackman apodization and one image of Coherence Factor Map (CFM) are obtained. The specific interaction between each propagation mode and the defects and the characteristics of acoustic radiation patterns due to different apodization functions result in images with different resolution and contrast. From the phase information one of the SA images is selected at each pixel to compound the final image. The SA images are multiplied by the CFM image to improve contrast and for the dispersive A0 mode it is used a technique for dispersion compensation. There is a contrast improvement of 47.5 dB, reducing the dead zone and improving resolution and damage detection. © 2012 IEEE. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-12-01 2014-05-27T11:27:18Z 2014-05-27T11:27:18Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/conferenceObject |
format |
conferenceObject |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1109/ULTSYM.2012.0360 IEEE International Ultrasonics Symposium, IUS, p. 1441-1444. 1948-5719 1948-5727 http://hdl.handle.net/11449/73834 10.1109/ULTSYM.2012.0360 2-s2.0-84882430610 6405339510883203 2883440351895167 0000-0003-4201-5617 0000-0001-6320-755X |
url |
http://dx.doi.org/10.1109/ULTSYM.2012.0360 http://hdl.handle.net/11449/73834 |
identifier_str_mv |
IEEE International Ultrasonics Symposium, IUS, p. 1441-1444. 1948-5719 1948-5727 10.1109/ULTSYM.2012.0360 2-s2.0-84882430610 6405339510883203 2883440351895167 0000-0003-4201-5617 0000-0001-6320-755X |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
IEEE International Ultrasonics Symposium, IUS 0,264 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1441-1444 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808129372882731008 |