scholarly journals Development of a Smart Hydrogen Vessel Utilizing an Optical Fiber Acoustic Emission Sensor

2020 ◽  
Vol 46 (2) ◽  
pp. 62-67
Author(s):  
Takuma MATSUO ◽  
Kotaro HASE ◽  
Hiroki ORITO
Keyword(s):  
Acoustic Emission ◽  
Optical Fiber ◽  
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.

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

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 Monitoring of High Temperature Damage of Pipe Utilizing Heat Resistant Optical Fiber Acoustic Emission Sensor

2007 ◽  
Vol 56 (12) ◽  
pp. 560-567 ◽  
Author(s):  
Tomoharu Hayano ◽  
Takuma Matsuo ◽  
Hideo Cho ◽  
Mikio Takemoto
Keyword(s):  
Acoustic Emission ◽  
High Temperature ◽  
Optical Fiber ◽  
Acoustic Emission Sensor ◽  
Heat Resistant ◽  
Temperature Damage

Experimental investigation on time-domain features in the diagnosis of rolling element bearings by acoustic emission

2021 ◽  
pp. 107754632110161
Author(s):  
Aref Aasi ◽  
Ramtin Tabatabaei ◽  
Erfan Aasi ◽  
Seyed Mohammad Jafari
Keyword(s):  
Acoustic Emission ◽  
Condition Monitoring ◽  
Time Domain ◽  
Central Moment ◽  
Rolling Element Bearings ◽  
Test Rig ◽  
Acoustic Emission Sensor ◽  
Outer Race ◽  
Common Time ◽  
Rolling Element

Inspired by previous achievements, different time-domain features for diagnosis of rolling element bearings are investigated in this study. An experimental test rig is prepared for condition monitoring of angular contact bearing by using an acoustic emission sensor for this purpose. The acoustic emission signals are acquired from defective bearing, and the sensor takes signals from defects on the inner or outer race of the bearing. By studying the literature works, different domains of features are classified, and the most common time-domain features are selected for condition monitoring. The considered features are calculated for obtained signals with different loadings, speeds, and sizes of defects on the inner and outer race of the bearing. Our results indicate that the clearance, sixth central moment, impulse, kurtosis, and crest factors are appropriate features for diagnosis purposes. Moreover, our results show that the clearance factor for small defects and sixth central moment for large defects are promising for defect diagnosis on rolling element bearings.

scholarly journals Development of a low‐power wireless acoustic emission sensor node for aerospace applications

2021 ◽  
Author(s):  
Stephen Grigg ◽  
Rhys Pullin ◽  
Matthew Pearson ◽  
David Jenman ◽  
Robert Cooper ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Low Power ◽  
Sensor Node ◽  
Acoustic Emission Sensor ◽  
Aerospace Applications

High-temperature (> 1000 °C) acoustic emission sensor

2013 ◽  
Author(s):  
Joseph A. Johnson ◽  
Kyungrim Kim ◽  
Shujun Zhang ◽  
Di Wu ◽  
Xiaoning Jiang
Keyword(s):  
Acoustic Emission ◽  
High Temperature ◽  
Acoustic Emission Sensor
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