Development of efficient non-destructive inspection technique for large structures using pulse phase infrared thermography

2016 Fiscal Year Final Research Report

• Project/Area Number: 26282099
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Social systems engineering/Safety system
• Research Institution: The University of Tokushima (2015-2016); Tokyo University of Science (2014)
• Principal Investigator: Ishikawa Masashi 徳島大学, 大学院理工学研究部, 講師 (10635254)
• Co-Investigator(Kenkyū-buntansha): 八田 博志 国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 教授 (90095638) ; 笠野 英行 日本大学, 工学部, 助教 (20514417) ; 小笠原 永久 防衛大学校(総合教育学群、人文社会科学群、応用科学群、電気情報学群及びシステム工, システム工学群, 教授 (60262408) ; 山田 浩之 防衛大学校(総合教育学群、人文社会科学群、応用科学群、電気情報学群及びシステム工, システム工学群, 講師 (80582907) ; 宇都宮 真 国立研究開発法人宇宙航空研究開発機構, 研究開発部門第二研究ユニット, 主任研究員 (70450707)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 非破壊検査 / 赤外線サーモグラフィ / CFRP / コンクリート / レーザー加熱

Outline of Final Research Achievements

Non-contact remote non-destructive testing using infrared thermography and CO2 laser-scanning heating was examined in this study. Experimental and theoretical studies revealed that: 1) defects in a CFRP specimen located 10 m from the heat source were detected by the laser-scanning thermography method, 2) using phase images obtained by applying Fourier transformation to the thermal data was effective in improving the defect detectability, and 3) inspection time could be reduced by using phase images in high frequency range. By combining the main findings, the thermographic method could be an effective way for inspecting large structures located far from observers (such as tall bridges).

Free Research Field

非破壊検査