Detection of water leakage defects in cable insulation sheath based on terahertz time-domain spectroscopy

Abstract Water leakage of the insulation sheath can lead to a decrease in performance power cable, which poses hidden danger cable. Accurate detection and positioning water area are crucial for improving safety stability. In response defect cable sheath, this article proposes method based on reflective terahertz time-of-flight tomography technology measure sheath. A sample was prepared by simulating real scenarios. By analysing reflection time-domain optical spectrum imaging results sample, location be accurately measured, verifying application potential detecting seepage defects sheaths.