Non-destructive testing of metal plates by guided wave propagation image using scanning sound source technique and airborne ultrasound phased array with suppressed grating lobe generation
{"title":"Non-destructive testing of metal plates by guided wave propagation image using scanning sound source technique and airborne ultrasound phased array with suppressed grating lobe generation","authors":"Kyosuke Shimizu, Ayumu Osumi, Youichi Ito","doi":"10.1250/ast.44.431","DOIUrl":null,"url":null,"abstract":"We have been investigating non-destructive testing using a scanning airborne ultrasound source and a nonlinear harmonic method, and we have examined using an airborne ultrasound phased array (AUPA) to achieve high-speed non-destructive testing by electronically controlled scanning of the sound source. However, AUPAs can generate unnecessary foci, such as grating lobes (GLs), in addition to the main lobe (ML) generated at the focal point. In non-destructive testing, artifacts occur in the results because the ML and GLs excite the measurement object simultaneously. The GL generation can be suppressed by adjusting the spacing of the AUPA ultrasound emitters, which can decrease the generation of artifacts. In this paper, suppression of GL generation by using an AUPA and the reduction of artifacts in non-destructive testing results were verified by an experiment examining. We imaged a pseudo-defect on a metal plate by visualizing guided wave propagation without using an acoustic window.","PeriodicalId":46068,"journal":{"name":"Acoustical Science and Technology","volume":"50 1","pages":"0"},"PeriodicalIF":0.6000,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Acoustical Science and Technology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1250/ast.44.431","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ACOUSTICS","Score":null,"Total":0}
引用次数: 0
Abstract
We have been investigating non-destructive testing using a scanning airborne ultrasound source and a nonlinear harmonic method, and we have examined using an airborne ultrasound phased array (AUPA) to achieve high-speed non-destructive testing by electronically controlled scanning of the sound source. However, AUPAs can generate unnecessary foci, such as grating lobes (GLs), in addition to the main lobe (ML) generated at the focal point. In non-destructive testing, artifacts occur in the results because the ML and GLs excite the measurement object simultaneously. The GL generation can be suppressed by adjusting the spacing of the AUPA ultrasound emitters, which can decrease the generation of artifacts. In this paper, suppression of GL generation by using an AUPA and the reduction of artifacts in non-destructive testing results were verified by an experiment examining. We imaged a pseudo-defect on a metal plate by visualizing guided wave propagation without using an acoustic window.
期刊介绍：
Acoustical Science and Technology(AST) is a bimonthly open-access journal edited by the Acoustical Society of Japan and was established in 1980 as the Journal of Acoustical Society of Japan (E). The title of the journal was changed to the current title in 2001. AST publishes about 100 high-quality articles (including papers, technical reports, and acoustical letters) each year. The scope of the journal covers all fields of acoustics, both scientific and technological, including (but not limited to) the following research areas. Psychological and Physiological Acoustics Speech Ultrasonics Underwater Acoustics Noise and Vibration Electroacoustics Musical Acoustics Architectural Acoustics Sonochemistry Acoustic Imaging.
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