2021 Fiscal Year Final Research Report

New Ultrasonic Thermometry Based on Reflectivity Measurements and Its Application to Materials Processing Monitoring at High Temperatures

Research Project

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Project/Area Number	19H02477
Research Category	Grant-in-Aid for Scientific Research (B)
Allocation Type	Single-year Grants
Section	一般
Review Section	Basic Section 26050:Material processing and microstructure control-related
Research Institution	Nagaoka University of Technology
Principal Investigator	Ihara Ikuo 長岡技術科学大学, 工学研究科, 教授 (80203280)
Co-Investigator(Kenkyū-buntansha)	松谷巌東京電機大学, 理工学部, 准教授 (00514465) 鎌土重晴長岡技術科学大学, 工学研究科, 学長 (30152846)
Project Period (FY)	2019-04-01 – 2022-03-31
Keywords	超音波計測 / 非破壊計測 / 超音波サーモメトリ / 高温材料 / 温度プロファイル
Outline of Final Research Achievements	This work aims to create a new ultrasonic method for measuring the temperature profile and material properties of the inside, surface and interface of heated materials. First, a robust ultrasonic measurement system suitable for high temperature fields is constructed and a new temperature profiling method for the surface and the inside of a heated material is then developed. Next, a multi-channel ultrasonic measurement system for high temperatures is newly developed. The system is applied to real-time monitoring of the casting process installed as a feasibility experiment at a laboratory and its usefulness is then demonstrated. In addition, a backside condition monitoring method that utilizes the reflectance of thick plate materials is proposed and its effectiveness is also verified. Thus, the ultrasonic method that contributes to real-time quantitative monitoring for materials in high temperature fields has been created and its usefulness has successfully demonstrated.
Free Research Field	機械工学
Academic Significance and Societal Importance of the Research Achievements	本研究で得られた成果は、これまで困難とされていた高温場での超音波モニタリング、特に界面や材料内部の温度情報の定量評価を可能にすることにその学術的意義がある。また、その手法を活用することで、これまで未開拓であった各種材料加工プロセスの見える化を実現するもので、幅広い分野における材料加工のDX化を加速させるという点で社会的意義が大きいと考える。