Electrical impedance tomography-based sensing skin for detection of damage in concrete

摘要

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.