Effects of fabrication materials and methods on flexible resonant sensor signal quality
Effects of fabrication materials and methods on flexible resonant sensor signal quality
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DOI：
10.1016/j.eml.2020.101027
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发表时间：
2020-11-01
影响因子：
4.7
通讯作者：
Reuel, Nigel F.
中科院分区：
文献类型：
--
作者：
Charkhabi, Sadaf;Chan, Yee Jher;Reuel, Nigel F.
电感电容（LC）谐振传感器可以在封闭环境中提供低成本的非接触式测量。在这项工作中，三种制造方法来生产柔性LC传感器进行了比较：丝网印刷浆料，蚀刻镀铜聚酰亚胺，和缠绕的金属线。通过矢量网络分析仪驱动的近场耦合天线询问LC传感器。通过提取S-21散射参数的谐振频率（MHz）和峰-峰幅度（dB）来分析传感器响应。对于丝网印刷谐振器，不同的参数，如印刷特征尺寸（250至500 μ m），导电膏银含量（杜邦PE 825和5028的低和高银含量，分别），固化条件（对流烘箱温度和固化时间），和膏粘度（7.20-20.05帕中心点s）进行了探讨。将经验模型拟合到该数据，以允许预测满足应用所需的步进距离所需的传感器线厚度。然后将丝网印刷的谐振传感器与铜蚀刻和缠绕的金属线进行比较，以评估三种制造方法的成本和性能权衡。最后，通过对封闭弯曲容器中的液位进行非接触式测量，展示了柔性丝网印刷谐振传感器的使用情况。(C)2020爱思唯尔有限公司保留所有权利。
Inductor-capacitor (LC) resonant sensors can provide low-cost, contactless measurement in closed environments. In this work, three fabrication methods to produce flexible LC sensors are compared: screen-printed pastes, etched copper-coated polyimide, and wound metal wires. The LC sensors were interrogated by near-field coupled antennas driven by a vector network analyzer. The sensor response was analyzed by extracting the resonant frequency (MHz) and the peak-to-peak amplitude (dB) of the S-21 scattering parameter. For screen-printed resonators, varying parameters such as print feature size (250 to 500 mu m), conductive paste silver content (DuPont PE825 and 5028 for low and high silver content, respectively), curing condition (convection oven temperature and curing time), and paste viscosity (7.20-20.05 Pa center dot s) were explored. An empirical model was fit to this data to allow for prediction of required sensor line thickness needed to meet an application's required step-off distance. The screen-printed resonant sensors were then compared to copper-etched and wound metal wires to evaluate the cost and performance tradeoff of the three fabrication approaches. Finally, a use case of the flexible, screen-printed resonant sensors was demonstrated by contact-free measurement of fluid level of in a closed, curved container. (C) 2020 Elsevier Ltd. All rights reserved.