基于超声导波的车用氢瓶在线检验技术研究OA北大核心CSTPCD

The safety performance of in-service hydrogen cylinders for vehicle directly affects the feasibility of hydrogen energy transportation application scenario directly.The traditional dismantling offline inspection mode restricts the industry development.In combination with the previous research achievements,the vehicle cylinder inspection strategy should be innovated to guide to judge whether to conduct dismantling offline verification of safety performance of the cylinder or not by locating the damage.The research of algorithm for locating the defects of vehicle hydrogen cylinders and device development were carried out using the ultrasonic guided wave technology,and the unfavorable factors such as big interference noise and high signal-to-noise ratio of metal base carbon fiber composite materials were tackled,the damage signal was effectively extracted,and high precision damage location was achieved.Experiments on vehicle hydrogen cylinders with extreme impulse damage and surface crack have verified that the damage locating error can be within 5%,which has a very important application prospect for safety performance evaluation of in-service vehicle hydrogen cylinders.