傾斜利用BOCDRによる炭素繊維強化プラスチック材料中の歪分布測定および破断点検出に関する李(D2)の論文が Applied Physics Express に掲載されました。

H. Lee, Y. Ochi, T. Matsui, Y. Matsumoto, Y. Tanaka, H. Nakamura, Y. Mizuno, and K. Nakamura, “Distributed strain measurement and possible breakage detection of optical-fiber-embedded composite structure using slope-assisted BOCDR,” Appl. Phys. Express, vol. 11, no. 7, 072501 (2018).

Slope-assisted Brillouin optical correlation-domain reflectometry (SA-BOCDR) is a recently developed structural health monitoring technique for measuring strain, temperature, and loss distributions along optical fibers. Although the basic operational principle of this method has been clarified, no measurements using optical fibers embedded in actual structures have been reported yet. As a first step toward such practical applications, in this work, we present an example of SA-BOCDR-based diagnosis using a composite structure with carbon fiberreinforced plastics. The system’s output agrees well with the actual strain distributions. We were also able to detect the breakage of the embedded fiber, thus demonstrating the promise of SA-BOCDR for practical applications.