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On-line quality estimation of resistance spot welding based on extraction of signals feature
Author(s): 
Pages: 52-57
Year: Issue:  9
Journal: TRANSACTIONS OF THE CHINA WELDING INSTITUTION

Keyword:  电阻点焊特征提取数据泛化Hopfield神经网络模式识别;
Abstract: 以焊点接头强度作为焊点质量评判的指标,通过对点焊过程焊接电流、动态电阻、电极位移信号的同步采集和特征分析,提取若干特征参量监测点焊过程,依据特征参量与焊点接头抗剪强度间的相关分析结果,选取来自不同监测信号的7个特征参量建立了表征点焊过程的特征模式,并将此转化为计算机可以识别的模式矩阵,同时以焊接电流参数为模式分类的依据,建立不同模式矩阵类别和焊点接头抗剪强度之间的映射,将模式矩阵作为Hopfield神经网络的记忆样本存储于网络,利用网络联想记忆的功能实现对未知样本点焊过程的模式识别,进而实现点焊质量的评判.网络测试结果表明,利用Hopfield网络进行焊点质量在线评判可以得到满意的效果.
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