Terahertz time-domain spectroscopy detection of metal foreign bodies in GIS equipment

Metallic foreign bodies often appear in Gas-insulated Switchgear (GIS). Metallic foreign bodies can cause great harm to the insulation performance of GIS equipment. Therefore, it is very necessary to detect metal foreign bodies in GIS equipment. In this paper, terahertz time-domain spectroscopy is used to measure the three insulating materials of epoxy resin, silicon rubber, ceramics and the mixtu...