Durability Optimization of Fiber Grating Hydrogen Sensor Based on Residual Stress
<p>Simplified diagram of the sensor model.</p> "> Figure 2
<p>Mesh division.</p> "> Figure 3
<p>Stress cloud diagram of optical fiber under different film thickness <span class="html-italic">t</span>. (<b>a</b>) <span class="html-italic">t</span> = 60 nm; (<b>b</b>) <span class="html-italic">t</span> = 100 nm; (<b>c</b>) <span class="html-italic">t</span> = 150 nm; (<b>d</b>) <span class="html-italic">t</span> = 200 nm; (<b>e</b>) <span class="html-italic">t</span> = 250 nm.</p> "> Figure 4
<p>Film thickness–residual stress transformation curve. (<b>a</b>) All data; (<b>b</b>) Partial data magnification.</p> "> Figure 5
<p>Speed–stress curve. (<b>a</b>) <span class="html-italic">t</span> = 60 nm; (<b>b</b>) <span class="html-italic">t</span> = 100 nm; (<b>c</b>) <span class="html-italic">t</span> = 150 nm; (<b>d</b>) <span class="html-italic">t</span> = 200 nm; (<b>e</b>) <span class="html-italic">t</span> = 250 nm.</p> "> Figure 6
<p>Optical fiber stress cloud diagram. (<b>a</b>) Coating one time; (<b>b</b>) Coating two times; (<b>c</b>) Coating three times; (<b>d</b>) Coating four times.</p> "> Figure 7
<p>Coating layer number–residual stress equivalent stress transformation curve.</p> "> Figure 8
<p>Sensor preparation system. (<b>a</b>) Vacuum pump; (<b>b</b>) Magnetron sputtering apparatus; (<b>c</b>) Optical fiber rotary table; (<b>d</b>) Nitrogen bottle.</p> "> Figure 9
<p>Palladium film coating under the crystal phase microscope.</p> "> Figure 10
<p>Optical fiber grating hydrogen sensor. (<b>a</b>) LC jumper; (<b>b</b>) Heat shrink tube; (<b>c</b>) Hydrogen-sensitive probe.</p> "> Figure 11
<p>Wavelength drift of hydrogen sensors with different thicknesses at 1% H<sub>2</sub>.</p> "> Figure 12
<p>Wavelength drift of hydrogen sensors with different thicknesses at 1.5% H<sub>2</sub>.</p> "> Figure 13
<p>Wavelength drift of hydrogen sensors with different thicknesses at 0.5% H<sub>2</sub>.</p> ">
Abstract
:1. Introduction
2. Modeling
3. Numerical Simulation Results and Discussion
3.1. The Influence of Coating Thickness on the Film–Substrate System
3.2. The Influence of Coating Speed on the Film–Substrate System
3.3. The Influence of the Number of Coatings on the Film–Substrate System
4. Experimental Verification and Result Analysis
4.1. Preparation of Optical Fiber Grating Hydrogen Sensor
4.2. Hydrogen Sensitivity Test and Durability Test
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
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Material | Elastic Modulus ( | Poisson’s Ratio | Density | Specific Heat Capacity ( | Thermal Expansion Coefficient (/K) | Thermal Conductivity (w/cmK) |
Pd | 121 | 0.39 | 12.02 | 244 | 11.2 | 71.8 |
SiO2 | 73.1 | 0.16 | 2.2 | 966 | 0.5 | 0.27 |
Film Thickness/nm | Coating Speed/(μm/s) | Coating Times |
---|---|---|
200 | 62.5 | 3 |
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Ma, W.; Li, Y.; Yang, N.; Fan, L.; Chen, Y.; Zhou, X.; Li, J.; Yang, C. Durability Optimization of Fiber Grating Hydrogen Sensor Based on Residual Stress. Sensors 2021, 21, 7657. https://doi.org/10.3390/s21227657
Ma W, Li Y, Yang N, Fan L, Chen Y, Zhou X, Li J, Yang C. Durability Optimization of Fiber Grating Hydrogen Sensor Based on Residual Stress. Sensors. 2021; 21(22):7657. https://doi.org/10.3390/s21227657
Chicago/Turabian StyleMa, Wenbo, Yuyang Li, Ning Yang, Li Fan, Yanli Chen, Xuan Zhou, Jiaping Li, and Caiqian Yang. 2021. "Durability Optimization of Fiber Grating Hydrogen Sensor Based on Residual Stress" Sensors 21, no. 22: 7657. https://doi.org/10.3390/s21227657