布里渊温度和压力传感器增敏设计

Sensitization Design of Brillouin Temperature and Pressure Sensor

摘要:

设计了一种基于分布式传感技术的薄壁圆筒型液体温度和压力传感器。选取具有耐腐蚀、弹性性能好以及热膨胀系数大的不锈钢316L和铍青铜C17200分别对传感器进行封装。利用有限元仿真软件ANSYS Workbench对封装的传感器压力和温度特性进行仿真分析,得到器件的径向应变量,分析其布里渊频移随压力和温度的变化关系。仿真实验表明,使用铍青铜C17200封装的传感器压力灵敏度和温度灵敏度更高,在0~12MPa、-5~40℃范围内压力灵敏度达11.1MHz/MPa,温度灵敏度达2.56MHz/℃,相较于普通单模光纤分别提升7.4倍和1.7倍。

Abstract:

A thin-walled cylindrical liquid temperature and pressure sensor based on distributed sensing technology was designed. The sensors are packaged with stainless steel 316L and beryllium bronze C17200, which have corrosion resistance, good elasticity, and a large thermal expansion coefficient. The finite element simulation software ANSYS Workbench was used to simulate and analyze the pressure and temperature characteristics of the packaged sensor, and the radial strain of the device was obtained, and the relationship between the Brillouin frequency shift and the pressure and temperature was analyzed. The simulation experiment shows that the pressure sensitivity and temperature sensitivity of the sensor using the beryllium bronze C17200 package is higher. The pressure sensitivity can reach 11.1MHz/MPa and the temperature sensitivity can reach 2.56MHz/℃ in the range of 0~12MPa and -5~40℃. Compared with ordinary single-mode fiber, it is increased by 7.4 times and 1.7 times respectively.