Vibration Sensing Characteristics of Reflection-Type Excessively Tilted Fiber Grating Cantilever

被引：4

作者：

Deng Ou ^{[1
]}

Luo Binbin ^{[1
]}

Wu Decao ^{[1
]}

Xie Lang ^{[1
]}

Zhao Mingfu ^{[1
]}

Zou Xue ^{[1
]}

Shi Shenghui ^{[1
]}

Liu Enhua ^{[1
]}

Jiang Shanghai ^{[1
]}

机构：

[1] Chongqing Univ Technol, Chongqing Key Lab Opt Fiber Sensor & Photoelect D, Chongqing 100051, Peoples R China

来源：

ACTA OPTICA SINICA | 2020年 / 40卷 / 20期

关键词：

fiber optics; excessively tilted fiber grating; vibration sensing; reflection-type; cantilever; bending;

D O I：

10.3788/AOS202040.2006001

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A vibration sensor based on the reflection-type excessively tilted fiber grating (ExTFG) cantilever is proposed in this work. The bending strain characteristics and vibration sensing principle of ExTFG arc theoretically analyzed, and a finite element model is constructed by ANSYS to analyze the modality and resonance characteristic response of the sensor. The dynamic response characteristics of bending vibration of the sensor under the periodic load arc studied experimentally. The results show that the vibration sensor based on the reflection-type ExTFG cantilever exhibits a good dynamic response to the acceleration continuous excitation signal. The natural frequency of the sensor can be changed by adjusting its length. The sensor has a good linear response in the range of 1-5g, and its maximum acceleration sensitivity is increased by about 2.5 times compared to the transmission -type ExTFG vibration sensor. The maximum acceleration sensitivity of the transverse electric mode and transverse magnetic mode reaches 0.3 V/g and 0.26 V/g, respectively. In addition, the size of the sensor probe is small enough, and the ExTFG is used as the sensitive unit without additional packaging, so it has potential value in practical applications.

引用

页数：8

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