This paper proposes a new printed electrical impedance tomography (EIT) sensor for detection of damage in composite structure. The EIT sensor consists of a sensing area and related electrical circuits. It is directly printed on the surface of composite structure by a layer-by-layer screen printingprocess with graphene-doped carbon ink and silver ink. By injecting tiny currents into the EIT sensor and measuring the corresponding boundary voltages, damage information can be obtained by inverse analysis to reconstruct the distribution of conductivity change caused by damage. It has the potential to quantitatively identify the locations and sizes of multiple damage without any prior knowledge. Experimental results on a glass fiber reinforced polymer (GFRP) plate with different number of simulated damage have demonstrated the effectiveness of the printed sensor itself and the related damage detection method.

中文翻译：

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用于检测复合材料损坏的印刷电阻抗层析成像传感器

本文提出了一种新型的印刷电阻抗层析成像（EIT）传感器，用于检测复合结构中的损坏。EIT传感器由一个感应区域和相关的电路组成。通过石墨烯掺杂碳墨水和银墨水的逐层丝网印刷工艺将其直接印刷在复合结构的表面上。通过向EIT传感器注入微小电流并测量相应的边界电压，可以通过反分析获得损伤信息，以重建由损伤引起的电导率变化的分布。在没有任何先验知识的情况下，它有可能定量地确定多重破坏的位置和大小。