脉冲熔化极氩弧焊熔滴过渡过程多信息融合

利用同步采集系统采集了固定脉冲GMAW熔滴过渡过程的电信息和光谱信息,准同步拍摄了电弧的图像信息。在反映熔滴过渡特征方面,电信息(电弧电压和电流)、光谱信息和图像信息通过时间为主线融合在一起存在明显的对应关系。其中,光谱信息变化最为显,信号强度变化占总强度的47．5％。电弧光谱信息明显反映了GMAW熔滴过渡期间焊丝端头缩颈、熔滴长大和分离等过程。DFT(Discrete fourier transform)分析进一步证明,在反映熔滴过渡频率特征方面,电信息和光谱信息完全对应。

Multi-information fusion of droplet transfer in pulsed GMAW

Electric and spectral information of droplet transfer in pulsed GMAW are collected by using picking system,the image of droplet transfer is also quasi-synchronously shot by high-speed camera.There is explicit characteristic of correspondence reflecting the droplet transfer among the electric,spectral and image information based on time information fusion.Thereinto,the variation of spectral information is the greatest when the transfer appears and it can reach 47% of the total intensity.All of the necking down,droplet growing up and falling apart during droplet transfer of pulsed GMAW process can be found in spectral information.Further,DFT (Discrete Fourier Transform) analysis shows that the electric and spectral frequency information and the droplet transfer frequency also matches well.