Observation of damage in insulated copper cables by THz imaging

Seiya Takahashi; Tomoyuki Hamano; Kaori Nakajima; Tadao Tanabe; Yutaka Oyama

doi:10.1016/j.ndteint.2013.10.004

Observation of damage in insulated copper cables by THz imaging

Seiya Takahashi, Tomoyuki Hamano, Kaori Nakajima, Tadao Tanabe, Yutaka Oyama

Department of Engineering and Design

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

A novel non-destructive inspection method using terahertz waves for the detection of broken wires in copper cables shielded by insulating polymer opaque in the visible and near infrared light region is presented. Terahertz reflection imaging, using a 0.14 THz IMPATT oscillator and a Schottky barrier detector, was applied to insulated copper cables that had been artificially damaged. The internal insulated wires embedded in the opaque polyethylene can be clearly visualized using THz radiation. It was shown that a gap in a wire can be detected by a decrease in the intensity of the reflected signal where the size of the gap is greater than the wavelength of the oscillator.

Original language	English
Pages (from-to)	75-79
Number of pages	5
Journal	NDT and E International
Volume	61
DOIs	https://doi.org/10.1016/j.ndteint.2013.10.004
Publication status	Published - 2014

Keywords

Copper conducting wire
Non-destructive inspection
THz imaging

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

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10.1016/j.ndteint.2013.10.004

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title = "Observation of damage in insulated copper cables by THz imaging",

abstract = "A novel non-destructive inspection method using terahertz waves for the detection of broken wires in copper cables shielded by insulating polymer opaque in the visible and near infrared light region is presented. Terahertz reflection imaging, using a 0.14 THz IMPATT oscillator and a Schottky barrier detector, was applied to insulated copper cables that had been artificially damaged. The internal insulated wires embedded in the opaque polyethylene can be clearly visualized using THz radiation. It was shown that a gap in a wire can be detected by a decrease in the intensity of the reflected signal where the size of the gap is greater than the wavelength of the oscillator.",

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author = "Seiya Takahashi and Tomoyuki Hamano and Kaori Nakajima and Tadao Tanabe and Yutaka Oyama",

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T1 - Observation of damage in insulated copper cables by THz imaging

AU - Takahashi, Seiya

AU - Hamano, Tomoyuki

AU - Nakajima, Kaori

AU - Tanabe, Tadao

AU - Oyama, Yutaka

N1 - Funding Information: This work was partially supported financially by the Ministry of Land, Infrastructure, Transport and Tourism .

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AB - A novel non-destructive inspection method using terahertz waves for the detection of broken wires in copper cables shielded by insulating polymer opaque in the visible and near infrared light region is presented. Terahertz reflection imaging, using a 0.14 THz IMPATT oscillator and a Schottky barrier detector, was applied to insulated copper cables that had been artificially damaged. The internal insulated wires embedded in the opaque polyethylene can be clearly visualized using THz radiation. It was shown that a gap in a wire can be detected by a decrease in the intensity of the reflected signal where the size of the gap is greater than the wavelength of the oscillator.

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