| Citation: | LIU Qiang, MA Chao, WEI Shu-hui, LIU Wei, WANG Jian-xin, LV Jing-wei, LV Ting-ting, LIU Chao. Fiber Bragg Grating Temperature and Pressure Sensor based on Hinge Lever Structure[J]. Chinese Optics. doi: 10.37188/CO.2024-0090
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In this paper, a high-sensitivity temperature and pressure sensor is designed. The sensor structure is based on the double-hinged lever structure and diaphragm to transfer pressure, adopting fiber Bragg grating (FBG1) as the strain sensor to realize the measurement of pressure. The introduction of the double-hinged lever effectively improves the pressure measurement sensitivity of the sensor. The measuring range of sensor is 0−18 MPa and the sensitivity is 453.16 pm/MPa. At the same time, another fiber Bragg grating (FBG2) is pasted on the lever to eliminate the temperature influence in the process of pressure measurement and realize the simultaneous measurement of temperature and pressure. The temperature sensitivity of the sensor is 10.41 pm/°C in the range of 25−65 °C. Due to the anti-electromagnetic interference characteristics of optical fiber sensors, they are usually used to measure temperature and pressure in harsh environment.
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