Research work of wire extension control based on vision sensing was done in pulsed MIG welding process of aluminum alloy.A rapid prototyping control platform was established for pulsed MIG welding of aluminum alloy using real-time target environment based on xPC.With vision sensing of welding zone image and corresponding image processing algorithm,a fuzzy PID closed loop control system for wire extension was designed on the basis of the built rapid prototyping control platform.Then experimental results show that the method of vision sensing can meet the control requirements of wire extension stability,the rapid prototyping control system built with fuzzy PID controller based on vision sensing can realize the well control of the wire extension in pulsed MIG welding of aluminum alloy and also has strong robustness and quick response ability.%针对铝合金脉冲MIG焊过程焊丝伸出长度的视觉控制进行了研究.设计了基于视觉传感的焊丝伸出长度模糊PID闭环控制系统,采用基于xPC的实时目标环境,建立了铝合金脉冲MIG焊快速原型的控制平台,并进行了铝合金脉冲MIG焊焊丝伸出长度视觉控制试验.结果表明,在铝合金脉冲MIG焊过程中,视觉传感的方法能够满足焊丝伸出长度稳定性的控制,且利用模糊PID控制器建立的快速原型视觉传感控制系统可以实现铝合金脉冲MIG焊丝伸出长度的良好控制,具有较强的鲁棒性和快速响应能力.
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