基于双麦克风阵列时间延迟的脉冲惰性气体保护焊焊缝偏差预测

Welding Path Deviation Prediction Based on Time Delay of a Dual-Microphone Array

采用相位变换-广义互相关(PHAT-GCC)法对脉冲惰性气体保护焊(MIG)焊接低碳钢过程中双麦克风阵列提取的两路信号进行时间延迟估计,通过加权最小二乘稳健回归方法得到适用于MIG焊接低碳钢过程的时间延迟-焊缝偏差预测模型,并通过实验加以验证.结果表明,所提出的时间延迟-焊缝偏差预测模型可以满足焊缝偏差的预测要求.

The phase transformation-generalized cross-correlation （PHAT-GCC） method was used to estimate the time delay of two acoustic signals. Then a robust regression method based on weighted least squares was used to obtain the time delay-deviation prediction model suitable for the low carbon steel butt pulsed metal inert gas （MIG） welding process. Experimental results indicate that the time delay-deviation prediction model can meet the requirements of predicting welding path deviation.