MIG电弧近红外辐射传感与分析  

Sensing and analysis of MIG arc near-infrared radiation

作　　者：冯立[1] 李志勇[1] 杨军涛[1] 范力予 

机构地区：[1]中北大学材料科学与工程学院,山西太原030051

出　　处：《电焊机》2015年第4期12-16,共5页Electric Welding Machine

基　　金：山西省留学回国人员择优资助项目;山西省留学回国人员科研资助项目(2012-69)

摘　　要：针对熔化极惰性气体保护焊(MIG)电弧辐射特点,开发了近红外光电检测电路及采集系统,对MIG焊电弧的红外辐射与电信号进行分析。研究结果表明,焊接参数不同,MIG焊电弧的红外光谱信息的变化特点不同。在短路过渡下,随电流增加,短路过渡频次增加,对应的红外光谱辐射强度存在波动,但信号特征不明显。在滴状过渡下,与焊接电流信号的同步采集分析表明,当电流发生变化时,辐射强度也会相应地发生变化,红外光谱信号品质好,优于电流信号和可见光信号。随着电流增大,达到临界值以上时,出现射滴过渡;此时红外信号变化幅度减小,仍优于电流信号。A near-infrared photoelectric circuit and acquisition system are developed to collect and analyze the infrared radiation and electrical signal of MIG welding. The results show that the characteristics of the infrared spectral information of MIG welding arc are different under different welding parameters. In the short circuiting transfer,the short transition frequency enhances as the current increases,the corresponding infrared spectrum radiation intensity fluctuates,but the signal feature is not obvious. In the droplet transition,the analysis of welding current synchronization signal shows that when the current changes,radiation intensity varies correspondingly,infrared spectrum signal quality is much better than the current and visible signal. When the current reaches above the threshold,the spraying transfer occurs;the variation amplitude of infrared signal decreases meanwhile,but is still better than the current signal.

关 键 词：MIG 电弧 近红外辐射 传感 

分 类 号：TG403[金属学及工艺—焊接]