An optical fiber F-P acoustic emission sensor system for the detection of steel crack initiation

2012 ◽  
Author(s):  
Xinglin Tong ◽  
Tao Ji ◽  
Wanting Wei ◽  
Changshan Wen ◽  
Xiaolong Zhu ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Crack Initiation ◽  
Optical Fiber ◽  
Sensor System ◽  
Acoustic Emission Sensor

scholarly journals Influence of Initial Phase Modulation on the Sensitivity of the Optical Fiber Sagnac Acoustic Emission Sensor

2019 ◽  
Vol 9 (5) ◽  
pp. 1018
Author(s):  
Zhuming Cheng ◽  
Jie Zeng ◽  
Dakai Liang ◽  
Chen Chang ◽  
Bing Wang
Keyword(s):  
Acoustic Emission ◽  
Optical Fiber ◽  
Initial Phase ◽  
Experimental System ◽  
Phase Sensitivity ◽  
Acoustic Emission Sensor ◽  
Alloy Plate ◽  
Practical Applications ◽  
Sensing System ◽  
Good Agreement

Improving the phase sensitivity of the optical fiber Sagnac sensor is very important for accurately detecting weak signals of acoustic emission. Theoretical analysis shows that the initial phase of the sensor is π under ideal conditions, and the maximum phase sensitivity is obtained when the bias phase is π/2. In this work, an experimental system was built with an aluminum alloy plate as the experimental object. The initial phase of the sensor was modulated by a Y-branch waveguide, and the fitting curve of the experimental data was in good agreement with the curve of the numerical simulation. Moreover, our experiments show there was a single value for the bias phase of π/2, which significantly deviated from the theoretical value. The results show that the greatest phase sensitivity of the sensor not only could be increased by nearly nine times through modulating the initial phase, but also could suppress the harmonic interferences in the sensing system. This study can provide a useful reference for improving the phase sensitivity of the optical fiber Sagnac AE sensor in practical applications.

3D Printing Optical Fiber Fabry-Perot Cavity Acoustic Emission Sensor

2020 ◽  
Vol 47 (9) ◽  
pp. 0906004
Author(s):  
沈诗 Shen Shi ◽  
魏鹤鸣 Wei Heming ◽  
王俊 Wang Jun ◽  
刘奂奂 Liu Huanhuan ◽  
马章微 Ma Zhangwei ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
3D Printing ◽  
Optical Fiber ◽  
Acoustic Emission Sensor ◽  
Fabry Perot

scholarly journals Design and testing of a MEMS acoustic emission sensor system

2008 ◽  
Author(s):  
David W. Greve ◽  
Irving J. Oppenheim ◽  
Amelia P. Wright ◽  
Wei Wu
Keyword(s):  
Acoustic Emission ◽  
Sensor System ◽  
Acoustic Emission Sensor ◽  
Design And Testing
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