An adaptive line enhancement technique for Fiber Bragg grating-based acoustic emission sensor

2012 ◽  
Author(s):  
Anshuman Sharma ◽  
Harish Achar ◽  
Balaji Srinivasan
Keyword(s):  
Acoustic Emission ◽  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Acoustic Emission Sensor ◽  
Enhancement Technique ◽  
Adaptive Line Enhancement

scholarly journals Design Optimization of Sensitivity-Enhanced Structure for Fiber Bragg Grating Acoustic Emission Sensor Based on Additive Manufacturing

Sensors ◽  
2022 ◽  
Vol 22 (2) ◽  
pp. 416
Author(s):  
Yang Yu ◽  
Bo Liu ◽  
Feng Xia
Keyword(s):  
Acoustic Emission ◽  
Additive Manufacturing ◽  
Fiber Bragg Grating ◽  
Experimental System ◽  
Sensitivity Coefficient ◽  
Bragg Grating ◽  
Response Analysis ◽  
Acoustic Emission Sensor ◽  
Element Analysis ◽  
Sensor Structure

A four-loop shaped structure of fiber Bragg grating (FBG) acoustic emission (AE) sensor based on additive manufacturing (AM) technology is proposed in the letter. The finite element analysis (FEA) method was used to model and analyze the sensor structure. We aimed at improving the sensitivity, the static load analysis, and the dynamic response analysis of the normal FBG acoustic emission sensor and the FBG AE sensor with improved structure parameters. We constructed the FBG AE sensor experimental system based on a narrowband laser demodulation method and test on real acoustic emission signals. The results demonstrated that the response sensitivity of the FBG acoustic emission sensor was 1.47 times higher than the sensitivity of the normal FBG sensor. The sensitivity coefficient of PLA-AE-FBG2 sensor was 3.057, and that of PLA-AE-FBG1 was 2.0702. Through structural design and parameter optimization, the sensitivity and stability of the FBG AE sensor are improved. The four-loop shaped sensor is more suitable for the health monitoring in fields such as aero-engine blade, micro-crack of structure, and crack growth in bonded joints. While ensuring the sensing characteristics, sensitivity, and stability of the four-loop shaped sensor have been enhanced. It is possible to apply the FBG AE sensor in some complex engineering environments.

scholarly journals Application of Fiber Bragg Grating Acoustic Emission Sensors in Thin Polymer-Bonded Explosives

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3778 ◽  
Author(s):  
Tao Fu ◽  
Peng Wei ◽  
Xiaole Han ◽  
Qingbo Liu
Keyword(s):  
Acoustic Emission ◽  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Location Method ◽  
Thin Polymer ◽  
Time Coefficient ◽  
Polymer Bonded Explosives ◽  
Acoustic Emission Sensors

Fiber Bragg grating (FBG) acoustic emission (AE) sensors have been used in many applications. In this paper, based on an FBG AE sensor, the sensing principle of the interaction between the AE wave and the sensor is introduced. Then, the directionality of the FBG AE sensor on the surface of a thin polymer-bonded explosive (PBX) material is studied. Finally, the time coefficient location method is proposed to correct the AE time detected by the FBG AE sensor, thereby improving the accuracy of location experiments.

Acoustic emission measurement using a strain-insensitive fiber Bragg grating sensor under varying load conditions

2009 ◽  
Vol 34 (19) ◽  
pp. 2942 ◽  
Author(s):  
Hiroshi Tsuda ◽  
Eiichi Sato ◽  
Tomio Nakajima ◽  
Hideyuki Nakamura ◽  
Takahiro Arakawa ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Fiber Bragg Grating ◽  
Fiber Bragg Grating Sensor ◽  
Bragg Grating ◽  
Emission Measurement ◽  
Bragg Grating Sensor ◽  
Acoustic Emission Measurement ◽  
Load Conditions
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