Acoustic sensor measurement system based on phase-shift fiber Bragg grating

被引：1
|
作者：
Chen, Chengyuan [1 ]
Wang, Runna [1 ]
Chen, Xuefeng [1 ]
Liu, Shengchun [1 ]
机构：
[1] Heilongjiang Univ, Heilongjiang Prov Key Lab Metamat Phys & Device, Harbin 150080, Heilongjiang, Peoples R China
来源：
OPTICS FRONTIERS ONLINE 2020: DISTRIBUTED OPTICAL FIBER SENSING TECHNOLOGY AND APPLICATIONS | 2021年 / 11607卷
关键词：
Optical sensor; pi phase shift fiber Bragg grating (PSFBG); unbalanced Michelson interferometer; demodulation system;
D O I：
10.1117/12.2586779
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In order to solve the problem that traditional piezoelectric sensors (PZT) cannot be implanted into the material to monitor the internal sound field transmission of the material, an unbalanced Michelson interferometer is used to build an acoustic signal based on a phase shift fiber Bragg grating (PSFBG) Monitoring system, carried out acoustic signal transmission detection experiment, compared the signal characteristics of PSFBG and PZT two sensors; and studied the sensitivity and temperature stability of PSFBG signal. The results show that the sensitivity of PSFBG is higher than that of the commercial R15a acoustic emission PZT sensor, and the volume is much smaller than that of PZT. It can be applied to the detection of sound field transmission inside the material; it can work stably under a wide temperature threshold (-20 degrees C similar to 80 degrees C) environment, with amplitude variation not more than 5%; The self-built PSFBG demodulation system is used to measure the acoustic signal in real time.
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页数：9
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