The Study of the Directional Sensitivity of Fiber Bragg Gratings for Acoustic Emission Measurements

被引：10
|
作者：
Jinachandran, Sagar [1 ]
Basu, Abheek [2 ]
Li, Huijun [2 ]
Xi, Jiangtao [1 ]
Prusty, B. Gangadhara [3 ]
Rajan, Ginu [1 ]
机构：
[1] Univ Wollongong, Sch Elect Comp & Telecommun Engn, Wollongong, NSW 2522, Australia
[2] Univ Wollongong, Sch Mech Mat Mechatron & Biomed Engn, Wollongong, NSW 2522, Australia
[3] Univ New South Wales, Sch Mech & Mfg Engn, Sydney, NSW 2052, Australia
来源：
IEEE SENSORS JOURNAL | 2019年 / 19卷 / 16期
关键词：
Fiber Bragg gratings; acoustic emission; structural health monitoring; directional sensitivity; packaged sensors;
D O I：
10.1109/JSEN.2019.2913415
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Structural health monitoring (SHM) of engineering structures plays a crucial role in ensuring their safety and integrity. Acoustic emissions (AE) can be one of the several ways to monitor the structural health. Fiber Bragg grating (FBG)-based AE measurement technique is emerging as a solution to assess cracks in structures remotely and has advantages of being less bulky and having low noise, high bandwidth and ease of implementation. This paper presents a study on the impact of AE signals on FBGs attached to a substrate, focusing on the directional sensitivity using different configurations. For ease of installation, the FBG sensors are metallically packaged similar to lead zirconium titanate (PZT) sensors in which they can withstand temperatures of up to 250 degrees C. The directional AE sensitivity of the packaged FRG sensor device is studied and compared with that of a surface attached FBG. Experimentally, the AE signals are generated by a metal ball drop impact on aluminum plate and are measured using an FBG AE interrogation system. A numerical simulation of the design was carried out using ANSYS explicit dynamics and the AE wave propagation in structure was analyzed and experimentally verified.
引用
收藏
页码：6771 / 6777
页数：7
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