Research on aircraft cable defect detection technology based on ultrasonic guided waves

Because of the special internal environment of the aircraft, the damage of the cable insulation layer is unavoidable, which may cause significant economic losses, and even seriously threaten the lives and safety of the crew. At present, aircraft cable fault detection methods cannot effectively monitor the status of aircraft cable insulation layer online, so the need to improve the cable detection methods is increasingly urgent. In this paper, a defect detection system of aircraft cable insulation layer based on ultrasonic guided waves is established. The system can detect the defect of cable insulation layer on line and offer early warning to reduce the operation and maintenance cost of aircraft, which has important economic and social significance. The experiment shows that the system can detect the defects of the insulation layer of the aircraft cable. By collecting the signals of four types of defects of the aircraft cable, the influence of the defect type and the defect size on the propagation process of the ultrasonic guided waves on the insulation layer of the aircraft cable is analyzed.