Both gas insulated switchgear (GIS) and gas insulated transmission line (GIL) are applications of gas-insulated metal closure technology, while GIL is very close to the coaxially placed bus bars in GIS. This paper systematically investigates the detection method of X-ray imaging technology for mechanical type defects inside GIS/GIL. The X-ray visual detection system is used to carry out visual online detection of GIS/GIL equipment, enabling timely and effective detection of structural defects in bus bars, switchgear components and other parts. A GIS/GIL oriented X-ray detection robot system is also designed, and the X-ray visual detection system is mounted on a detection robot arm, which has a positive effect on ensuring the safety and efficiency of field detection.
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