Due to the strong randomness of fault distribution and low reliability of detection results in zinc oxide lightning arresters, a fault detection method for zinc oxide lightning arresters based on infrared thermal imaging technology is proposed. The FLIR T600 infrared thermal imager with a resolution of${640}\times {480}$pixels is used to capture thermal sensing images of lightning arresters. The fault area is identified through temperature characteristics of the fault location and binary image processing, and the detection output of temperature abnormal areas is obtained. The test results show that the detection results of different areas of the zinc oxide lightning arrester device are completely consistent with the manual detection results, and there are no missed or false detections.

infrared thermal imaging technology  /  zinc oxide lightning arrester  /  fault detection  /  temperature diffusion characteristics  /  inscribed rectangle