動画像による振動計測を用いた鉄構ボルト緩み検知

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2024/07/01

タイトル(英語): Bolt Loosening Detection for Steel Structures Utilizing Video-Based Vibration Sensing Technology

著者名: 高田　巡（（一財）電力中央研究所），伊藤　憲彦（（一財）電力中央研究所）

著者名(英語): Jun Takada (Central Research Institute of Electric Power Industry), Norihiko Itoh (Central Research Institute of Electric Power Industry)

キーワード: 鉄構，ボルト緩み，動画像による振動計測　　steel structure，bolt loosening，video-based vibration sensing

要約(英語): There is a high demand for a safe and cost-effective method to inspect the tightness of bolts remotely, which are widely used in power plants. Since it is known that rigidity decreases of a structure due to bolt loosening can be reflected in natural frequency of the structure, many methods for detecting bolt loosening through natural frequency have been proposed. However, most of those require the installation of contact sensors or markers, making them difficult to use when the main vibration point is at a high location. To overcome this problem, we utilized a video-based vibrometry technology which enables to measure vibration from a distance without any pre-installed sensors or markers and measured vibration of a substation’s steel structure under impact excitation. The result suggested that the technology could remotely detect the decrease in dominant frequencies of the neighboring parts of intentionally loosened bolts, as well as the disappearance of the peaks.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.144 No.7 （2024） 特集：2023年電子・情報・システム部門大会

本誌掲載ページ: 622-629 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/144/7/144_622/_article/-char/ja/