How To Operate And Maintain Insulators--ultrasonic Method

Tsinghua University has studied the use of ultrasound to detect cracks in composite high voltage standoff insulators core rods. Ultrasonic testing is based on the principle that ultrasound will be reflected, refracted and transformed at the interface of the two media during the propagation process from one medium into another. The ultrasonic generator emits an initial pulse into the high voltage epoxy medium. When the size and position of the defect wave in epoxy resin insulator are determined, the defect in high voltage epoxy resin can be judged. Using ultrasound to detect mechanical defects in composite high voltage standoff has the advantages of simple operation, safety and reliability, and strong anti-interference ability. However, due to the problems of coupling, attenuation and ultrasonic transducer performance, there has been no major breakthrough in long-distance telemetry, which is not suitable for on-site detection, but mainly used for online detection in enterprise production and laboratory identification.