High‐Speed Underfilm Corrosion Imaging Using a Terahertz Camera

Fuse, Norikazu; Fukuchi, Tetsuo; Mizuno, Maya; Fukunaga, Kaoru

doi:10.1002/ecj.11843

Cited by 8 publications

(2 citation statements)

References 16 publications

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“…can be derived from Equation (2). Thus, at the moment t = n∆t, the iterative calculation of the node i, j + 1 2 , k + 1 2 is…”

Section: Fdtd Alrightmmentioning

confidence: 99%

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Improved Numerical Modeling of Terahertz Wave Propagation in Epoxy Coating with the Finite-Difference Time-Domain Method

Tu,

Zhong,

Zhang

et al. 2023

Coatings

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Electromagnetic theoretical analysis was usually used to investigate the pulsed terahertz wave interaction with the medium. For epoxy coatings, the material dispersion of the coating was often simplified or ignored in the traditional propagation model. It is difficult to elaborate on the propagation mechanism and to differentiate the coating deterioration as serving time increases. An improved propagation model based on the finite-difference time domain was established to characterize the propagation in the epoxy protective coating under broad-band terahertz radiation. Either an intact or defective coating structure was investigated, and the simulated results were compared with the experimental test. The dissipation mechanism was considered in the proposed model. The results indicated that the terahertz reflections varied with the change in optical and dielectric properties caused by coating aging, which influences the intrinsic impedance of the medium. Moreover, it could well elucidate the propagation mechanism of pulsed terahertz waves in rusted, defective coating structures.

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“…can be derived from Equation (2). Thus, at the moment t = n∆t, the iterative calculation of the node i, j + 1 2 , k + 1 2 is…”

Section: Fdtd Alrightmmentioning

confidence: 99%

“…Terahertz time-domain spectroscopy (TD-THz) technology provides the capability for standoff inspection in many industries. Due to its advantage of subpicosecond time resolution, the inspection ability based on terahertz nondestructive testing technology for protective coatings has been extensively studied over the past few years [1,2].…”

Section: Introductionmentioning

confidence: 99%