Electrical Impedance Spectroscopy-Based Defect Sensing Technique in Estimating Cracks

Sensors

Tingting Zhang²  Liangdong Zhou²  Habib Ammari¹  Jin Keun Seo² 

[1] Department of Mathematics and Applications, Ecole Normale Supérieure, 45 Rue d'Ulm, 75005 Paris, France; E-Mail:;Department of Computational Science and Engineering, Yonsei University, Seoul 120-749, Korea; E-Mails:

关键词: defect sensing;    impedance spectroscopy;    inverse problem;    concrete cracks;   

DOI  :  10.3390/s150510909

来源: mdpi

【 摘 要 】

A defect sensing method based on electrical impedance spectroscopy is proposed to image cracks and reinforcing bars in concrete structures. The method utilizes the frequency-dependent behavior of thin insulating cracks: low-frequency electrical currents are blocked by insulating cracks, whereas high-frequency currents can pass through thin cracks to probe the conducting bars. From various frequency-dependent electrical impedance tomography (EIT) images, we can show its advantage in terms of detecting both thin cracks with their thickness and bars. We perform numerical simulations and phantom experiments to support the feasibility of the proposed method.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.