水深环境下湿法焊接声压替代图像信号可行性分析

水深环境下水下湿法药芯焊丝焊接(FCAW)受周围电弧气泡生长的影响，其状态需要通过信号采集. 文中首先搭建水下湿法焊接试验平台，进行湿法药芯焊丝焊接试验，对焊接过程中的气泡声压信号、高速摄像信号、电弧电流电压信号，进行同步采集；然后对比了引弧阶段下浅水和20 m水深的气泡动态演变图像及其声压信号，结合20 m水深稳弧阶段信号，发现气泡脉冲声信号与气泡图像在气泡大小、爆破周期等演变细节上有着很好的对应关系，但随着水深增加，烟尘导致图像信号更加模糊. 最后对水下20，40 m的环境中获取到的电弧从引弧到稳弧阶段的声电信号，进行对照分析. 结果表明，气泡声压信号可以清晰地反映出气泡的变化状态，深水下声压信号替代高速摄像具有可行性.

Feasibility analysis of image signal replaced by sound pressure in wet welding under depth water environment

Under water deep environment, underwater wet flux cored wire welding (FCAW) welding is affected by the growth of the surrounding arc bubbles, and its state needs to be collected through signal. The article first builds an underwater wet welding test platform to conduct a wet flux-cored wire welding experiment. The bubble sound pressure signal, high-speed camera signal, and arc current and voltage signal in the welding process are collected synchronously; then, the arc ignition stage is compared. The dynamic evolution images of bubbles in shallow water and 20 m depth and their sound pressure signals, combined with the 20 m depth arc stabilization phase signal, it is found that the bubble pulse sound signal and the bubble image have a good corresponding relationship in the evolution details such as bubble size, blasting period, etc. As the water depth increases, soot causes the image signal to become more blurred. Finally, a comparative analysis of the acousto-electric signals from the arc starting to the arc stabilization stage obtained in the environment of 20 and 40 m underwater, shows that the bubble sound pressure signal can clearly reflect the changing state of the bubble, and the deep underwater sound pressure signal It is feasible to replace high-speed cameras.