基于温度场实时检测的焊接质量模糊控制系统  

Welding fuzzy control system based on realtime measurements of thetemperature field

作　　者：刘文焕[1] 陈劲松[1] 王克争[1] 潘际銮[1] 

机构地区：[1]清华大学机械工程系,北京100084

出　　处：《清华大学学报（自然科学版）》2002年第11期1437-1440,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家自然科学基金资助项目(59475064)

摘　　要：针对焊接工艺的特点,以工业用电荷耦合器件(IC-CD)传感器为测量元件,建立了焊接温度场图像实时采集与处理系统。采用模糊推理控制算法,并在手动控制策略的基础上提出了该系统的模糊控制规则。以焊接电流为控制量,研制了薄板钨极惰性气体(TIG)焊背面温度场等温线宽度闭环控制系统。通过控制接近熔点温度的等温线宽度最终实现了对焊缝背面熔宽和熔透的控制。大量的焊接工艺试验表明,系统有较好的适应性和较高的稳态精度和动态响应特性,并具有较强的抗干扰能力。A realtime system was developed to record the welding temperature field using an industrial chargecoupled device (ICCD) sensor. A fuzzy control system developed to regulate the system was based on hand control tactics. A closedloop control system using the welding current as the control parameter was used to control the width of an isothermal region on the back side of the weld during tungsten inert gas (TIG) welding of thin plates. Control of the penetration and width of the back side weld was then achieved by controlling the width of an isothermal line near the melting point. Welding tests show that the system has good adaptability, good accuracy, the ability to withstand disturbances and better dynamic characteristics. 

关 键 词：实时检测 焊接质量 模糊控制系统 工业用电荷耦合器件 焊接温度场 图像处理 焊接电流 

分 类 号：TG441.7[金属学及工艺—焊接] TG40