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中文摘要：
设计了高压干法水下熔化极惰性气体保护焊（MIG）电弧声采集硬件系统，研究分析了不同环境压力对声音信号的影响规律，并进行了不同压力环境下的传声器校准；采用LabVIEW软件编程，同步采集焊接过程中的电弧声和电流、电压信号，在时域和频域两方面分析高压干法水下MIG焊接过程中不同环境压力下的电弧声信号特征，为电弧声在高压干法水下MIG焊接质量监控中的应用奠定基础．
英文摘要：
The hardware of arc sound acquisition system in hyperbaric underwater MIG welding was de- signed, the influence of different pressure to voice signal was studied, and the microphone was calibrated according to different pressures. Based on the LabVIEW software programming, the arc sound signal, welding current and arc voltage during welding were asynchronously acquired and the signal feature of arc sound in the different pressures was analyzed both in time domain and frequency domain, which lay the foundation for the application of arc sound signal in hyperbaric underwater MIG welding quality control.
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