Developing a multifunctional, wireless sensor system for monitoring the process parameters during the production of carbon-fiber reinforced composites

开发多功能无线传感器系统，用于监测碳纤维增强复合材料生产过程中的工艺参数

• 批准号: 417571210
• 负责人: Professor Dr.-Ing. Martin Vossiek
• 金额: --
• 依托单位: Lehrstuhl für Hochfrequenztechnik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/417571210?language=en
• 关键词: Developing; multifunctional; wireless; sensor; system

In a previous projec, a direct relation between the degree of curing of resin systems and their dielectric characteristics at 24 GHz was proven by correlating the curing curves of an innovate reaction kinetics model with permittivity curves. In addition, a novel batteryless, wireless 24GHz sensor for recording in-situ the permittivity and temperature during curing within a fiber composite structure was developed and successfully tested experimentally.Given that this sensor is suitable only for use in non-conductive fiber-reinforced composites (FRCs), the present project will investigate the extent to which it can be successfully adapted for use in FRCs with conductive carbon fibers (CFs), as carbon fiber reinforced composite structures must operate to the highest standards in structural components.The problem with carbon fiber reinforced polymers (CFRPs) is that the radio signal between sensor and scanner is highly attenuated by the conductive fibers. The attenuation depends mainly on the polarization of the electromagnetic fields and the fiber arrangement.In order to classify the effects of different textile layers, fiber volume ratios and polarizations, they will be characterized with, and without curing epoxy resin at different temperatures by means of a quasi-optical transmission system. This will determine at which configurations the material cannot be irradiated without additional measures. The transmissivity should be improved by introducing dielectric channels above the antennas. To this end, a concept is required for constructing the channels and for precisely inserting them before the structure is infused, so as to minimize any effects on the structural load capacity of the surrounding component. The sensor operating frequency should be increased, as well, in order to minimize the dimensions of sensor and channels – thus moderating the structural impact. Due to the newly added requirements, only the basic principle of operation for the sensor from the previous project can be applied in the new project. The sensor itself and the dielectric channels must be completely redesigned.A linked simulation model needs to be designed to first compute the mechanical impact of the embedded sensor and the associated channel on complex structures, and to determine the effects of sensor geometry and boundary-layer adhesion. The simulation thus supports the empirical optimization of sensor loading with respect to geometry and boundary layer.Based on the test results for the sensor components and structural mechanics, the final wireless sensor will be designed, assembled and tested in a fiber-composite curing process. Finally, the novel sensor will be tested in a real infusion process to verify its practical usability.

在先前的项目中，通过将创新反应动力学模型的固化曲线与介电曲线相关联，证明了树脂系统的固化程度与它们在24 GHz处的亡灵特征之间的直接关系。此外，开发并成功地测试了一种新型的无电，无线24GHz传感器，用于录制原位的原位固化期间的介电常数和温度，并通过实验进行了成功测试。该传感器仅适用于非导电纤维增强的组件（FRC）的使用，本项目将与frc相机地用于范围。 （CFS），因为碳纤维增强的复合结构必须在结构组件中运行。碳纤维增强聚合物（CFRP）的问题是，传感器和扫描仪之间的无线电信号被导电纤维高度减弱。衰减主要取决于电磁场和纤维排列的极化。为了对不同的纺织层，纤维体积比和极化的影响进行分类，它们的特征将以QASI-OPTICTICT TRICEPTIC传输系统在不同的温度下在不同的温度下制成。这将确定未经其他措施的材料在哪种配置下无法照射。应通过在天线上方引入饮食通道来改善传输。为此，需要一个概念来构建通道并精确地插入结构之前，以最大程度地减少对周围组件的结构负载能力的任何影响。传感器工作频率也应增加，以最大程度地减少传感器和通道的尺寸，从而调节结构影响。由于新添加的要求，只有上一个项目的传感器的基本操作原理才能应用于新项目。传感器本身和饮食通道必须完全重新设计。需要设计一个链接的仿真模型，以首先计算嵌入式传感器的机械影响以及对复杂结构上的相关通道的机械影响，并确定传感器几何形状和边界层粘附的影响。因此，该模拟支持传感器负载相对于几何和边界层的经验优化。基于传感器组件和结构机械的测试结果，最终无线传感器将在光纤复合材料固化过程中设计，组装和测试。最后，新型传感器将在真实的输液过程中进行测试，以验证其实际的可用性。