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year 28, Issue 1 (1st Iranian Conference on optical fiber sensors (ICOFS 2021) 2021)
ICOP & ICPET _ INPC _ ICOFS 2021, 28(1): 4-6 |
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Bashiri Godarzi F, Hasanshahi A, Khalilzadeh J, Riahi A. Experimental study of the effect of diaphragm thickness and cavity length on Fabry-Perot optical fiber sensor for gas pressure measurement. ICOP & ICPET _ INPC _ ICOFS 2021; 28 (1) :4-6
URL: http://opsi.ir/article-1-2491-en.html
URL: http://opsi.ir/article-1-2491-en.html
1- Laser and Optics Research Center, Imam Hossein University, Tehran, Iran.
Abstract: (1334 Views)
In this paper, an interfering point optical fiber sensor is introduced to study the pressure of various argon, oxygen and nitrogen gases. The sensor probe is made with air cavity and with different lengths, and also a suitable diaphragm with different thicknesses is considered in order to achieve the optimal thickness and length of the Fabry- Perot cavity. PVC material is used for sensor layer, and a gas pressure sensor sensor setup was set up in the laboratory. The effect of diaphragm thickness and cavity length as two important parameters on the sensitivity of gas pressure sensor has been investigated. In the laboratory for gas pressure tests, diaphragm thicknesses of 28, 42, 56, 70 and 84 μm, the cavity lengths are 0.3, 0.55, 0.85, 1 and 1.25 mm and the compression range is 20 to 80 mbar. The results show that by reducing the diaphragm thickness and also reducing the cavity length, the sensitivity of the sensor increases.
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