High Accuracy Measurement of Tribological Phenomena by Dual AE Sensing Method

2022 Fiscal Year Final Research Report

• Project/Area Number: 19K04154
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 18040:Machine elements and tribology-related
• Research Institution: Saitama Institute of Technology
• Principal Investigator: Hase Alan 埼玉工業大学, 工学部, 准教授 (10552953)
• Project Period (FY): 2019-04-01 – 2023-03-31
• Keywords: トライボロジー / アコースティックエミッション / in situ観察 / in situ計測 / 短時間周波数解析 / 摩擦・摩耗モード / 高確度化 / AE信号-トライボロジー特性マップ

Outline of Final Research Achievements

Two acoustic emission (AE: elastic stress waves generated by deformation and fracture of materials) sensors were attached to both friction materials in friction and wear experiments to establish a measurement and evaluation method using dual sensing of AE signals generated in friction systems, called dual AE sensing. Then, a database of AE signal features based on the results of in situ observations of various practical materials and friction conditions (e.g., lubrication and foreign particles) was constructed, and correlation maps between tribological properties and AE signals and evaluation algorithms to serve as evaluation guidelines were created. The dual AE sensing allows the tribological properties of two friction materials to be evaluated separately. This enables in situ measurement and evaluation of complex mixed friction and wear modes for each friction material, and allows for discussion of the causes of problems and material development from a new perspective.

Free Research Field

トライボロジー

Academic Significance and Societal Importance of the Research Achievements

デュアルAEセンシングによって，二つの摩擦材料の各々のトライボロジー特性を別々に評価することができる．これによって，複雑に混在する摩擦・摩耗モードを摩擦材料ごとにその場計測（in situ計測）・評価でき，新たな視点で原因究明や材料開発などの議論ができるようになる．
本研究でバージョンアップしたAE信号-トライボロジー特性マップなどの相関関係を活用することにより，様々な分野でのトライボロジー現象のin situ計測・評価が可能になり，摩擦材料の状態監視（IoT化や知能化への応用）のみならず最適設計への視野が大きく広がる．