Abstract
At present, one of the main inspection methods of electric wires is visual inspection. The development of a novel non-destructive inspection technology is required because of various problems, such as water invasion by the removal of insulators. Since terahertz (THz) waves have high transparency to nonpolar substances such as coatings of conductive wire, electric conductive wires are extremely suitable for THz non-destructive inspection. In this research, in order to investigate the quantitative possibility of detecting the defects on aluminum electric wire, THz wave reflection imaging measurement was performed for artificially disconnected wires. It is shown that quantitative detection is possible for the disconnect status of the aluminum electric wire by using THz waves.
Highlights
IntroductionThe frequency 1 THz corresponds to a quantum energy of about 4.1 meV, which is relatively low—about one hundred thousandth of X-ray
Previous work on THz wave generation based on the excitation of phonon-polaritons in GaP was done by Nishizawa and Suto [1], and various kinds of THz light sources have been developed for practical applications
The influence of aperture was considered to be. This inspection method index similar to aluminum. These results show the possibility of detecting disconnected aluminum wires by using THz waves
Summary
The frequency 1 THz corresponds to a quantum energy of about 4.1 meV, which is relatively low—about one hundred thousandth of X-ray. Since the energy of the THz wave corresponds to various vibrations, such as intermolecular vibration, phonon vibration, and hydrogen bonding, it is possible to identify substances with its use. Because of such properties, THz waves are expected to be applied in various fields. Application as a new non-destructive inspection technology in place of conventional infrared/visible light and
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