Visualization of metal tube damage using double helical microstrip lines and self-sensing time-domain reflectometry method. (January 2017)

• Record Type: Journal Article
• Authors: Matsuzaki, Ryosuke; Kawasaki, Masahiro; Todoroki, Akira
• Is Part Of: NDT & E international. Volume 85(2017)
• Page Start: 20
• Page End: 26
• Publication Date: 2017-01
• Subjects: Time-domain reflectometry -- Self-sensing -- Finite-difference time-domain method -- Crack -- Visualization; Nondestructive testing -- Periodicals; Contrôle non destructif -- Périodiques; Electronic journals; 620.1127
• DOI: 10.1016/j.ndteint.2016.10.002
• Languages: English
• ISSNs: 0963-8695

Abstract

Abstract: The present study investigates crack visualization in a metal tube using self-sensing time-domain reflectometry with double helical microstrip lines (MSLs). The double helical MSL functions as a long-range sensing line without bend sections. It uses a differential circuit to reduce cross-talk noise. The electromagnetic field simulation results clarified that cross-talk noise is decreased when using the differential circuit. The experimental results confirmed a sudden change in the amplitude at the crack location and demonstrated that the crack was detectable. The crack existence probability obtained using the estimated value and estimation error variance from the Kriging approximation indicates a very high probability at the crack location. Highlights: Double helical microstrip lines were proposed for crack visualization in a tube. Double helical MSL functions as a long-range sensing line without bend sections. Cross-talk noise was reduced using a differential circuit and a double helical MSL. The proposed method can be applied to crack detection for a metal tube. Crack existence probability was visualized using the Kriging approximation.