智能结构中光纤智能夹层系统的研究

Research on Fiber-optic Smart Layer System for Smart Structures

根据光纤自诊断系统模块化、集成化要求,提出并研制了光纤智能夹层。这种智能夹层易于制作,且制作过程中光纤传感器完好率达100%,智能夹层的埋入对复合材料拉伸强度影响较小。在此基础上,对光纤智能夹层试件进行了轴向拉伸试验。试验表明,在一定应变范围内,单膜交错光纤中光强-应变之间具有良好的线性关系,可以在埋入复合材料之前进行标定。利用智能夹层内的光纤传感器网络和先进的信息处理技术,可以建立结构损伤主动、在线和实时监测系统。

Aimed at the demands of modularization and integration, the Fiber-Optic Smart Layer has been put forward. FOSL is easy to fabricate and to be in the good condition of fiber-optic sensors of FOSL in the process of manufacture, not to be degrade the tensile strength of the host composite structures embedded inside composite laminates. It have been shown that the optical strength to be linear with strain of layer embedded single mode crossing fiber-optic by axial tensile test to a certain extent of stain and performed on calibration before embedding composite. So, it can be achieved structural health monitoring of smart materials and structures by fiber-optic sensing networks and self-diagnosing modules of FOSL. Combination of a distributed array of fiber-optic sensors with an advanced data treatment technology, the active and real time sensing system would be established.