基于自相关分析的电弧焊熔滴过渡过程稳定性的定量评价

Quantitative evaluation on metal transfer process stability of arc welding based on autocorrelation analysis

文中提出了基于自相关分析的定量评价方法,从电弧焊的电压电流信号中提取自相关函数峰值间距变异系数,作为电弧焊熔滴过渡过程稳定性评价的量值.结果表明,该方法所得的结果与人工分析判定的结果一致,切实可行.此外,该方法所提取的量值与其它量值联合使用,还较好地实现了CO2弧焊电源动特性的自动化评定.其准确率达97.4359%,已接近实际应用的要求.

This paper proposed a quantitative evaluation method based on autocorrelation analysis,to extract the coefficient of variation of intervals between autocorrelation function peaks from arc welding voltage and current signals,which were then used as the quantitative values to evaluate the metal transfer process stability in arc welding.Experiments showed that results obtained through this method were consistent with those from manual analysis.Besides,the combination of the quantitative values obtained through this method and other quantitative values has preferably realized the automatic evaluation evaluation of dynamic characteristics of power supply for CO2 arc welding.The recognition accuracy reached 97.4359%,which was quite close to the standard of practical use.