A Medium-Frequency Fiber Bragg Grating Accelerometer Based on Flexible Hinges
Abstract
:1. Introduction
2. Materials and Methods
2.1. Structure Model and Principle of the Sensor
2.2. Sensitivity
2.3. Resonance Frequency
2.4. Dimensional Parameter Optimization
3. Simulation Analysis of the Sensor
3.1. Model Analysis
3.2. Harmonic Response Analysis
4. Experimental Characterization of the Sensing Properties
4.1. Fabrication of Sensor
4.2. Experimental System Compositions
4.3. Amplitude-Frequency Response
4.4. Sensitivity
4.5. Temperature Self-Compensation
4.6. Cross-Interference Characteristic
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Parameter | Parameter Description | Value (Units) |
---|---|---|
r1 | Radius of hinge-1 | 2.5 mm |
t1 | Waist thickness of hinge-1 | 1.2 mm |
r2 | Radius of hinge-2 | 2.5 mm |
t2 | Waist thickness of hinge-2 | 2.2 mm |
d | Width of mass block | 10 mm |
h | Height of mass block | 30 mm |
w | Width of hinges | 8 mm |
l | Fiber pasting span | 5 mm |
Af | Section area of optical fiber | 1.227 × 10−8 m2 |
Ef | Young’s modulus of optical fiber | 70 GPa |
E | Young’s modulus of 304 steel | 210 GPa |
ρ | Density of 304 steel | 7850 kg·m−3 |
μ | Poisson’s ratio of 304 steel | 0.3 |
g | Gravitational acceleration | 9.8 m·s−2 |
Ref | Resonance Frequency | Sensitivity | Fiber Type | Temperature Self-Compensation |
---|---|---|---|---|
Stefani [28] | 3000 Hz | 19 pm/g | Polymer FBG | No |
Dai [29] | 2918 Hz | 13.82 pm/g | Silica FBG | No |
Guo [30] | 3600 Hz | 1.7 pm/g | Metalized FBG | No |
Wang [31] | 3806 Hz | 4.01 pm/g | Silica FBG | Yes |
Wu [32] | 8356 Hz | 0.46 pm/g | Silica FBG | Yes |
This article | 2800 Hz | 21.8 pm/g | Silica FBG | Yes |
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Li, Z.; Liang, L.; Wang, H.; Dai, S.; Jiang, K.; Song, Z. A Medium-Frequency Fiber Bragg Grating Accelerometer Based on Flexible Hinges. Sensors 2021, 21, 6968. https://doi.org/10.3390/s21216968
Li Z, Liang L, Wang H, Dai S, Jiang K, Song Z. A Medium-Frequency Fiber Bragg Grating Accelerometer Based on Flexible Hinges. Sensors. 2021; 21(21):6968. https://doi.org/10.3390/s21216968
Chicago/Turabian StyleLi, Zichuang, Lei Liang, Hui Wang, Shu Dai, Ke Jiang, and Zhiyuan Song. 2021. "A Medium-Frequency Fiber Bragg Grating Accelerometer Based on Flexible Hinges" Sensors 21, no. 21: 6968. https://doi.org/10.3390/s21216968