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23 October 2018 A chirped fiber optic Bragg grating-based cutter of shield tunnel boring machine real time monitoring method
Wang Jin, Wanshan Zhu, Lei Jiang Sr., Junfeng Jiang, Shuang Wang, Tiegen Liu III
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Proceedings Volume 10821, Advanced Sensor Systems and Applications VIII; 1082120 (2018) https://doi.org/10.1117/12.2502551
Event: SPIE/COS Photonics Asia, 2018, Beijing, China
Abstract
We propose a real-time monitoring method for shield tunnel boring machine cutter wear based on chirped fiber Bragg grating (CFBG). We use the chirped fiber Bragg grating as the wear detection sensor. When the wear occurs at the end face of the wear detection sensor (the end face of chirped fiber Bragg grating), the grating area of the chirped fiber Bragg grating will shorten with the occurrence of wear, which causes the bandwidth of the grating reflection spectrum to be narrowed, and the correlation theory of the fiber Bragg grating is used to calculate the wear rate. Experimental data shows that the sensor can survive in the actual operating conditions of the shield tunnel boring machine. After calibration, measurement accuracy can less than 1mm, and it can be used for real time wear detection of large machinery, such as shield tunnel boring machine.
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Wang Jin, Wanshan Zhu, Lei Jiang Sr., Junfeng Jiang, Shuang Wang, and Tiegen Liu III "A chirped fiber optic Bragg grating-based cutter of shield tunnel boring machine real time monitoring method", Proc. SPIE 10821, Advanced Sensor Systems and Applications VIII, 1082120 (23 October 2018); https://doi.org/10.1117/12.2502551
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KEYWORDS
Sensors
Fiber Bragg gratings
Refractive index
Calibration
Fiber optics
Structured optical fibers
Manufacturing
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