{"title":"Waves causing undesired heat pattern detected via ultrasound-excited active thermography","authors":"Masashi Ishikawa , Ryoto Maeda , Hideo Nishino , Masashi Koyama , Ryo Fukui","doi":"10.1016/j.infrared.2024.105652","DOIUrl":null,"url":null,"abstract":"<div><div>Undesired heat patterns detected via ultrasound-excited active thermography are observed and their origin is determined based on ultrasound propagation. Waves generated during the inspection of strip- and hollow cylindrical-shaped objects are investigated via experiments and numerical studies. The results show that the dominant waves propagating in the strip- and cylindrical-shaped objects are A<sub>0</sub>-mode Lamb waves and flexural-mode guided waves, respectively, and that the heat patterns are caused by standing waves generated by the propagation of the guided waves. The findings of this study should be fundamental knowledge to distinguish the temperature abnormalities caused by defects from undesired heat patterns and to improve the defect detection capability of ultrasound-excited thermography.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"145 ","pages":"Article 105652"},"PeriodicalIF":3.4000,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Infrared Physics & Technology","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S135044952400536X","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/11/30 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"INSTRUMENTS & INSTRUMENTATION","Score":null,"Total":0}
引用次数: 0
Abstract
Undesired heat patterns detected via ultrasound-excited active thermography are observed and their origin is determined based on ultrasound propagation. Waves generated during the inspection of strip- and hollow cylindrical-shaped objects are investigated via experiments and numerical studies. The results show that the dominant waves propagating in the strip- and cylindrical-shaped objects are A0-mode Lamb waves and flexural-mode guided waves, respectively, and that the heat patterns are caused by standing waves generated by the propagation of the guided waves. The findings of this study should be fundamental knowledge to distinguish the temperature abnormalities caused by defects from undesired heat patterns and to improve the defect detection capability of ultrasound-excited thermography.
期刊介绍：
The Journal covers the entire field of infrared physics and technology: theory, experiment, application, devices and instrumentation. Infrared'' is defined as covering the near, mid and far infrared (terahertz) regions from 0.75um (750nm) to 1mm (300GHz.) Submissions in the 300GHz to 100GHz region may be accepted at the editors discretion if their content is relevant to shorter wavelengths. Submissions must be primarily concerned with and directly relevant to this spectral region.
Its core topics can be summarized as the generation, propagation and detection, of infrared radiation; the associated optics, materials and devices; and its use in all fields of science, industry, engineering and medicine.
Infrared techniques occur in many different fields, notably spectroscopy and interferometry; material characterization and processing; atmospheric physics, astronomy and space research. Scientific aspects include lasers, quantum optics, quantum electronics, image processing and semiconductor physics. Some important applications are medical diagnostics and treatment, industrial inspection and environmental monitoring.
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