デジタル画像相関ベースのボルトプレロードモニタリング
Linsheng Huo1, Liukun Zhao1, Aocheng Hu1
1State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China.
Sensors (Basel, Switzerland)
|February 13, 2026
まとめ
この研究では,ボルトのプレロードモニタリングのためにデジタル画像相関 (DIC) を使用した新しい非接触方法が紹介されています. このアプローチは,ボルトの緩解を検出するために表面の張りを正確に追跡し,構造の安全性を高めます.
科学分野:
- エンジニアリング エンジニアリング
- 構造的健康モニタリング
- マテリアルサイエンス 材料科学
背景:
- ボルト接続は,エンジニアリングの構造において非常に重要ですが,緩む傾向があり,安全リスクをもたらします.
- ボルトの緩解を検出する既存の方法は,しばしば非効率,不正確,またはコンタクトセンサーを必要とする.
研究 の 目的:
- ボルトのプレロードをモニタリングするための新しい非接触方法の開発.
- 従来のボルトの緩解検出技術の限界を克服するために.
主な方法:
- 産業用カメラでデジタル画像相関 (DIC) を使用して,ボルトヘッドのスペックル画像を撮影します.
- 変形前と後のボルトヘッドの表面張力を測定する.
- 張力場を計算し,ボルトのプレロードと相関する変化を追跡します.
主要な成果:
- ボルトヘッドの表面張力場とボルトプレロードの間の線形関係が確立されました.
- DICベースの方法は,ボルトのプレロードの正確で効率的なモニタリングを証明しました.
- 実験的検証により,提案された技術の正確性と使いやすさが確認されました.
結論:
- この新しい非接触型DICメソッドは,ボルトのプレロードモニタリングのための正確で効率的でユーザーフレンドリーなソリューションを提供します.
- このテクニックは,構造的健康モニタリングと構造的整合性の確保におけるアプリケーションの有意な可能性を示しています.
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