基于光纤传感的飞机油箱液位监测传感器
2019-06-19
作者：朱家林，孟凡勇，闫光，宋言明，娄小平
单位：北京信息科技大学；光电信息与仪器北京市工程研究中心
摘要：为了监测飞机油箱液位，设计了一种以石英材质为基底的新型光纤光栅温度传感器。该材质与光纤的热膨胀系数一致，避免了光栅与基体热胀系数差异过大导致的长期稳定性变差问题，整体的无金属封装形式也保证了油箱在易燃易爆环境下的安全性。采用两端点胶的粘接方式，使用紫外胶将光纤固定在石英材质的基底上，并通过温度重复性试验、温度标定试验和验证试验等对传感器的性能进行测试。结果表明：采用石英材质作为基底的光纤光栅温度传感器线性度为0.998，温度灵敏度为8.5~9.2pm/℃。传感器性能良好，将传感器绕飞机油箱内壁进行阵列排布，油箱液位高度的精度与传感器的排布密度有关，能够达到对油箱液位进行监测的要求。
关键词：光纤光栅；温度传感器；石英材质；封装；飞机油箱液位
中图分类号：TG806；TH702文献标志码：ADOI：10.3969/j.issn.1000-7008.2019.06.020
Aircraft Fuel Tank Level Monitoring Sensor Based on Optical Fiber Sensor
Zhu Jialin，Meng Fanyong，Yan Guang，Song Yanming，Lou Xiaoping
Abstract:In order to monitor the liquid level of aircraft fuel tank，a new type of fiber bragg grating temperature sensor based on quartz material is designed.The thermal expansion coefficient of the material is consistent with that of the fiber, which avoids the longterm stability variation caused by the difference between the thermal expansion coefficients of the grating and the matrix.And the safety of fuel tank under inflammable and explosive environment is also guaranteed by the whole nonmetal packaging form.The glue is fixed on the quartz substrate by UV glue.The performance of the sensor is tested by temperature repeatability，temperature calibration and verification experiments.The experimental results show that the linearity of FBG temperature sensor based on quartz material is 0.998 and the temperature sensitivity is 8.5-92pm/℃.As a result，the sensor shows a good performance.The sensors are arrayed around the inner wall of the aircraft fuel tank and the accuracy of the tank level measurement is related to the density of the sensors, which can meet the requirement of monitoring the tank level.
Keywords:fiber bragg grating；temperature sensor；quartz material；package；aircraft fuel tank level