耐熱FBGによる高温構造物の振動変形モニタリング技術の開発

Vibration and deformation monitoring for high temperature structures by heat-resistant FBG

島田 幸洋; 増住 考志; 西村 昭彦  ; 土井 基尾*; 月森 和之

Shimada, Yukihiro; Masuzumi, Takashi; Nishimura, Akihiko; Doi, Motoo*; Tsukimori, Kazuyuki

フェムト秒レーザーを用いた非熱加工の手法を用いて石英板中に非可逆的な格子加工を行い、伝熱配管などの高温構造物の振動や変形を常時監視するための耐熱FBGの開発を目的として、その耐熱性評価を行った。その結果、950Cまでの昇温後も回折光の強度比は変化せず、高温配管の局所的な振動,歪の検知手法として耐熱FBGのシステムが有効であることを示した。

We performed irreversible lattice processing into the quartz board using the technique of non-heat processing which used femtosecond laser. The heat-resistant evaluation was performed for the purpose of development of heat-resistant FBG for always supervising heat transfer system vibration and modification of a high temperature structure. As a result, the intensity ratio of diffraction light did not change but after rising temperature up to 950 C showed that the system of heat-resistant FBG was effective as a local vibration of high temperature piping, and the distorted detection technique.