Laser Self-Mixing Interference: Optical Fiber Coil Sensors for Acoustic Emission Detection

被引：0
作者：
Yu, Lian [1 ]
Yang, Yu [2 ]
Liu, Bin [1 ]
Tang, Pinghua [1 ]
Ji, Haining [1 ]
Wang, Jingting [1 ]
Tan, Tianqi [1 ]
机构：
[1] Xiangtan Univ, Sch Phys & Optoelect, Xiangtan 411105, Peoples R China
[2] Northeastern Univ, Coll Med & Biol Informat Engn, Shenyang 110016, Peoples R China
来源：
PHOTONICS | 2023年 / 10卷 / 09期
基金：
中国国家自然科学基金;
关键词：
self-mixing interference; optical feedback interference; laser sensor; optical measurement and sensing; acoustic emission; INTERFEROMETRY;
D O I：
10.3390/photonics10090958
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Acoustic emission (AE) testing is a widely used nondestructive testing method for the early detection of failures in materials and structures. In this paper, an AE detection sensor combining optical fiber sensing with laser self-mixing interference (SMI) technology is proposed. A multi-coil optical fiber ring wound round a cylindrical acrylic skeleton was designed in order to sense the deformation caused by AE elastic waves, which was then demodulated using self-mixing interference technology. Finite element analyses were conducted in order to investigate the deformation of fiber under acoustic sources. AE signals induced via ball-dropping impact experiments were successfully detected by the proposed experimental system. The proposed SMI optical fiber AE sensing system has the advantages of being free from electromagnetic interference and having a simple structure, low implementation cost and high measurement resolution and sensitivity.
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页数：10
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