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根据光纤自诊断系统模块化、集成化要求,将曲率光纤传感器以环形布置在PE膜的对称两面,研制了一种智能夹层系统,它可以同时测量结构的曲率和扭转。提出了智能夹层系统的标定方法。对埋有光纤智能夹层的玻璃纤维增强树脂基复合材料试件在CMT6305型电子万能试验机上进行了轴向拉伸、压缩试验和三点式弯曲性能试验,结果表明,智能夹层的埋入对智能结构力学性能有一定的影响,但影响不大。将光纤智能夹层埋入复合材料内部进行了结构曲率测试,在埋入过程中,光纤传感器的完好率达100%。与埋入前的标定结果相比,智能夹层在埋入后的曲率测量最大偏差为5.2%,说明光纤智能夹层可以在埋入复合材料之前进行标定。
According to the requirement of modularization and integration of fiber self-diagnosis system, the optical fiber sensor with curvature is arranged on the symmetrical two sides of the PE film in a ring shape. An intelligent sandwich system is developed, which can measure the curvature and torsion of the structure simultaneously. The calibration method of intelligent mezzanine system is proposed. The tensile test, compression test and three-point bending test on the CMT6305 electronic universal testing machine were carried out on the glass fiber reinforced resin matrix composites embedded with the optical fiber smart interlayer. The results show that the embedding of the smart interlayer on the intelligent structure mechanics Performance has a certain impact, but little effect. The optical fiber sandwich was embedded in the composite material for structural curvature testing. During the embedding process, the optical fiber sensor integrity rate was 100%. Compared with the calibration results before embedding, the maximum deviation of the curvature of the smart interlayer after embedding is 5.2%, indicating that the smart optical fiber interlayer can be calibrated before embedding the composite material.