An Electromagnetic Sensor with a Metamaterial Lens for Nondestructive Evaluation of Composite Materials

Sensors

Adriana Savin²  Rozina Steigmann²  Alina Bruma¹  Roman Šturm³ 

[1] CRISMAT Laboratory, National Graduate School of Engineering, University of Caen on Normandy, 6 Marechal Juin Blvd, Caen 14050, France; E-Mail:;Nondestructive Testing Department, National Institute of R&D for Technical Physics, 47 D. Mangeron Blvd, 700050 Iasi, Romania; E-Mail:;Faculty of Mechanical Engineering, University of Ljubljana, Aškerčeva 6, 1000 Ljubljana, Slovenia; E-Mail:

关键词: electromagnetic sensor;    damages;    metamaterials lens;    FRPC;    nondestructive evaluation;   

DOI  :  10.3390/s150715903

来源: mdpi

【 摘 要 】

This paper proposes the study and implementation of a sensor with a metamaterial (MM) lens in electromagnetic nondestructive evaluation (eNDE). Thus, the use of a new type of MM, named Conical Swiss Rolls (CSR) has been proposed. These structures can serve as electromagnetic flux concentrators in the radiofrequency range. As a direct application, plates of composite materials with carbon fibers woven as reinforcement and polyphenylene sulphide as matrix with delaminations due to low energy impacts were examined. The evaluation method is based on the appearance of evanescent modes in the space between carbon fibers when the sample is excited with a transversal magnetic along z axis (TMz) polarized electromagnetic field. The MM lens allows the transmission and intensification of evanescent waves. The characteristics of carbon fibers woven structure became visible and delaminations are clearly emphasized. The flaws can be localized with spatial resolution better than λ/2000.

【 授权许可】

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