基于对熔化极气体保护焊电弧光谱信号动态特征重要意义的认识 ,以发现新的熔滴过渡传感方法为目的 ,本文提出准同步高速摄影法 ,设计了准同步光谱信号 -高速摄影检测装置 ,验证了光谱信号波形中的脉冲是熔滴过渡所为 ,它们之间存在着确定的对应关系。此外 ,本文还对该现象给予了充分的理论解释并指出了其在熔滴过渡检测上的应用前景。 Based on the recognition of the importance of the dynamic characteristics of the arc welding spectrum of the GMAW, aiming at the discovery of a new droplet transfer sensing method, a quasi-synchronous high-speed photography method was proposed in this paper. It is verified that the pulse in the spectral signal waveform is caused by the droplet transfer and there is a definite correspondence between them. In addition, this paper also gives a full theoretical explanation of this phenomenon and points out its application in the droplet transfer detection.