| Budget Amount *help |
¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000)
Fiscal Year 2020: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2018: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
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| Outline of Final Research Achievements |
We have accumulated research results to simplify a system configuration of our original technology “Brillouin Optical Correlation Domain Reflectometry” with keeping measurement functions. The system can realize a distributed measurement capability of strain and/or temperature along an optical fiber with a high spatial resolution to provide structural health monitoring function for large-scale ones, such as bridges. Two schemes for reducing the noise components in the system have been proposed, and these performances have been improved. It has been confirmed that the additional noise components introduced by two other original schemes for elongating the fiber length can also be reduced with using the two noise reduction schemes. These results have been obtained through the two research ways of simulation and experiment in fabricating appropriate waveforms to modulate the optical intensity/frequency and a new distributed measurement mechanism used in the total measurement system.
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