Abstract: In this paper, an electrically-based sensing skin for damage detection in concrete structures is developed. The sensing skin consists of a thin layer of electrically conductive copper paint that is applied to the surface of the concrete. Cracking of the concrete substrate results in a rupture of the sensing skin, decreasing the electrical conductivity of the sensing skin locally. The decrease of the conductivity is detected with electrical impedance tomography (EIT) imaging. This paper summarizes our recent findings based on experimental studies with polymeric substrates and reinforced concrete. We also show new results which suggest that the resolution of the reconstructed images can potentially be further improved.

Key words: sensing skin, damage detection, reinforced concrete, electrical impedance tomography (EIT) imaging

摘要： 提出了一种基于电的传感皮肤，可以应用于混凝土结构损伤检测。该传感皮肤由一层薄薄的导电性铜漆层构成，可以附着在混凝土表面，混凝土基体开裂会导致传感皮肤破裂，降低附近传感皮肤的电导率，通过电阻抗断层成像（EIT）技术可以检测到电导率的下降。文章总结了在聚合物基体和钢筋混凝土上进行试验的最新研究成果。此外，最新成果表明，重建图像的分辨率可以进一步提高。

关键词: 传感皮肤, 损伤检测, 钢筋混凝土, 电阻抗断层成像技术