Fiber-optic Distributed Strain and Temperature Sensor using BOCDA Technology at High Speed and with High Spatial Resolution - Taking on Aircraft Structural Health Monitoring

摘要

Yokogawa Electric Corporation, Mitsubishi Heavy Industries Ltd., the University of Tokyo, and the Materials Process Technology Center (SOKEIZAI Center) are developing a new fiber-optic distributed strain and temperature sensor for aircraft structural health monitoring (SHM) using Brillouin optical correlation domain analysis (BOCDA) technology. The BOCDA is suitable for aircraft SHM because it can measure the distribution of strain and temperature simultaneously at high speed and with high spatial resolution. A prototype on-board system was developed and mounted on a business aircraft in order to evaluate it during actual aviation. Changes in strain and temperature on the aircraft during ascent have been successfully measured. This paper outlines the prototype and explains the results of the evaluation.