多参量融合的光纤光栅传感器测试技术研究
2020-03-13左思佳李卢丹
左思佳 李卢丹



摘 要:目前飞行试验中温度和应变参数均采用传统传感器,每个参数单独测试采集,这种方法布线多,改装复杂,且飞机测试参数日益增多,对传感器重量、体积以及能否实现分布式测试要求迫切。通过安装光纤光栅传感器网络对飞机上多处应变/温度进行分布式测量,并通过与传统传感器比对,建立模型提高测量精度,实现多点应变、温度等参量同时测试,极大地减少加装在飞机上的传感器数量和重量,降低改装难度。
关键词:光纤光栅;飞行试验;温度;应变
中图分类号:V217 文献标志码:A 文章编号:2095-2945(2020)08-0144-03
Abstract: At present, the traditional temperature and strain sensors are used in the flight test. Each parameter is tested and collected separately. This method has many wiring, complex refitting. But there will be more and more aircraft test parameters. It is very important to decrease the weight, volume and to realize distributed test of sensors. Through the installation of fiber bragg grating (FBG) sensor network, the distributed measurement of strain/temperature in many places on the aircraft is carried out. Compared with the traditional sensor, the model is established to improve the measurement accuracy and realize the simultaneous measurement of multi-point strain, temperature and other parameters, thus greatly reducing the number and weight of sensors installed on the aircraft and reducing the difficulty of refitting.
Keywords: fiber bragg grating (FBG); flight test; temperature; strain
1 概述
欧美等许多发达国家已将光纤光栅传感技术应用于多种飞行器主要部件上,波音公司通过光纤光栅传感器实现温度和应力的遥测,并对结构进行评估;NASA通过光纤光栅传感器对X-33验证机上复合材料高压容器的温度、应力和压力情况进行全方位监测;空客公司通过光纤光栅传感器实现了对A340各机构的载荷标定,但由于国外的技术封锁,未能获取详细的技术资料。
为了推进光纤光栅传感技术在国内飞行试验上的应用,实现多路应变、温度数据准确测量,我们在探索光纤光栅传感特性和工作原理的基础上,欲将其安装于真实飞行试验环境中,实现多点应变、温度等参数同时测试;并与传统传感器进行比对测量,获取试验数据,并进行分析,从而为推进光纤光栅传感器在飞行试验中的应用奠定基础。
2 原理及技术实施方案……p>
