Reciprocal amplification of wave front for planar or point sources using a metamaterial lens to increase the inspection distance of pipelines

Gorkem Okudan; Hrishikesh Danawe; Lu Zhang; Serife Tol; Didem Ozevin

doi:10.1117/12.2557404

19 May 2020 Reciprocal amplification of wave front for planar or point sources using a metamaterial lens to increase the inspection distance of pipelines

Gorkem Okudan, Hrishikesh Danawe, Lu Zhang, Serife Tol, Didem Ozevin

Author Affiliations +

Proceedings Volume 11380, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XIV; 113800V (2020) https://doi.org/10.1117/12.2557404
Event: SPIE Smart Structures + Nondestructive Evaluation, 2020, Online Only

Abstract

Ultrasonic testing and acoustic emission are acknowledged non-destructive testing methods for pipeline inspection; however, attenuation is a significant issue in long-range structures such as pipelines. A gradient-index metamaterial lens composed of subbed unit cells is proposed to address the energy loss by amplifying the signal through wave focusing. A prototype is tested actively (ultrasonic testing) and passively (acoustic emission) in the laboratory, and significant amplification of the signal is observed. The reciprocity between the two methods is validated.

Conference Presentation

Citation Download Citation

Gorkem Okudan, Hrishikesh Danawe, Lu Zhang, Serife Tol, and Didem Ozevin "Reciprocal amplification of wave front for planar or point sources using a metamaterial lens to increase the inspection distance of pipelines", Proc. SPIE 11380, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, Civil Infrastructure, and Transportation XIV, 113800V (19 May 2020); https://doi.org/10.1117/12.2557404

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