The current signals with splash or without splash are processed using cepstrum transform in spot welding,and then the plots of the cepstrum are compared.

• 采用倒频谱法对不锈钢点焊过程中有、无飞溅的电流信号进行变换,分析比较两种情况下电流信号的倒频谱图,发现它们的倒频谱图在对称性、尖峰个数和大小方面具有明显差异。