摘要
为了提升GMM-FBG电流传感器的应变传感耦合特性,通过优化GMM和FBG的胶结层几何参数,有效提升传感器输出幅值.首先建立GMM-FBG电流传感器光纤层-涂覆层-胶结层-基体四层结构的应变传递模型,得到了光纤层与基体层之间平均应变传递率与胶结层基本参数之间的关系.并且通过有限元仿真验证了应变传递模型的准确性.以优化提升传感器的平均应变传递率为目的,对胶结层的长度、宽度、上下半部厚度、弹性模量和泊松比等参数进行了优化.结果显示优化后传感器的应变传递率得到有效提高,可使电流传感器的输出幅值增大.
Abstract
In order to optimize the strain sensor coupling characteristics of the GMM-FBG current sensor,the output amplitude of the sensor is effectively enhanceed through the geometric parameters of GMM and FBG.Firstly,the four-layer structure strain transmission model of the GMM-FBG current sensor is established,which includes fiber layer,coating layer,bonding layer and matrix layer.The rela-tionship between the basic parameters of the banding layer and the average strain transmission rate between the fiber layer and the ma-trix layer is obtained,and the accuracy of the strain transmission model is verified through the finite element simulation.In order to in-crease the average strain transfer rate of the sensor,the length,width,upper and lower thickness,elastic modulus and Poisson's ratio of the bonding layer are optimized.The results show that the strain transfer rate of the optimized sensor is effectively improved,and the output amplitude of the current sensor increases.
国家科技期刊平台
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