基于双层光电传感系统的YAG激光焊接质量检测  

YAG laser welding quality detection based on double-layer photoelectric sensing system

作　　者：江武志[1] 梁晨曦 吴华昶 贺贵腾 JIANG Wu-zhi LIANG Chen-xi WU Hua-chang HE Gui-teng(School of Information Engineering, Zhongshan Polytechnic, Zhongshan 528404, China School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510000, China)

机构地区：[1]中山职业技术学院信息工程学院,广东中山528404 [2]广东工业大学机电工程学院,广东广州510000

出　　处：《传感器世界》2017年第10期13-19,共7页Sensor World

基　　金：中山市科技局公益基金项目(NO.2015SYF0202);广东省自然科学基金项目(NO.2016A030310347);广州市科技计划项目(NO.201707010197)

摘　　要：为了实时监测激光焊接质量,设计了一套双层光电传感系统,系统能实时采集焊接实验中金属蒸汽及熔池两焊区的光辐射信号。信号经过PIN光电传感器转换成电压信号被数据采集卡采集保存。利用Matlab软件对采集数据进行频域分析。实验分析发现,金属蒸汽和熔池的光辐射有相似的频谱特征,频谱线波动程度与焊缝质量有明显关系。结果表明,该检测系统能有效实时监测焊接状态、识别焊接缺陷。A double-layer photoelectric sensing system is designed to realize real-time monitoring on laser weld quality. The system collects the optical radiation signals of metallic vapor and molten pool in real-time. The signals are converted to voltage signals by PIN photoelectricsensors and then collected and saved by the data acquisition card. Matlab is used to analyze the frequency domain of the saved data. Experimental results show that the optical radiation signals of metallic vapor and molten pool present similar frequency features, and the fluctuation of spectrum line affects welding quality obviously. The designed system is considered effective in realizing real-time monitoring on welding status and weld defecl recognition.

关 键 词：激光焊接 光电传感 焊接缺陷 实时监测 焊接状态 

分 类 号：TG456.7[金属学及工艺—焊接] TP212[自动化与计算机技术—检测技术与自动化装置]