Measuring Material Moisture in Fiber Reinforced Polymers by Integrated Sensors
Measuring Material Moisture in Fiber Reinforced Polymers by Integrated Sensors
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DOI：
10.1109/jsen.2018.2815029
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发表时间：
2018-05-01
影响因子：
4.3
通讯作者：
Lang, Walter
中科院分区：
文献类型：
--
作者：
Salas, Mariugenia;Huebner, Martina;Lang, Walter
环境会影响和改变纤维增强聚合物（FRP）结构的性能。除了温度的变化，湿度的变化也会对FRP的机械稳定性造成影响。此外，基于兰姆波传播的结构健康监测系统需要区分水分吸收和局部缺陷。这是因为湿度和高温会导致基质中的水分吸收，从而改变波的传播。因此，有必要确定和纳入水分水平的补偿方法，如最佳基线识别。在这里，集成的传感器被证明是有用的，在确定水的吸收，并在长期，甚至老化。本文介绍了商业上可用的电阻和电容传感器和一个新的灵活的叉指式传感器，集成在材料中监测水分吸收的成功评估。
The environment can influence and change the properties of structures made of fiber reinforced polymers (FRP). Besides changes in temperature, variation of moisture can be a problem for the mechanical stability of the FRP. In addition, structural health monitoring systems based on Lamb wave propagation need to differentiate between moisture up-take and the local defects. This is because humidity and high temperatures can lead to moisture up-take in the matrix, altering the wave propagation. Thus, it is necessary to determine and incorporate the level of moisture for compensation methods like optimal baseline identification. Here, integrated sensors demonstrate to be useful in the determination of water up-take and in the long term, even aging. This paper presents the successful evaluation of commercially available resistive and capacitive sensors and a new flexible interdigital sensor, integrated in the material to monitor moisture up-take.