基于Labview的脉冲激光-电弧复合焊接相位匹配触发控制系统

Study on phase matching control system for pulsed laser-arc hybrid welding based on Labview

介绍了基于NI Labview开发的脉冲激光-电弧复合焊接相位匹配触发控制系统.应用NI PCI6221数据采集卡对交流电弧信号进行采集,通过上位机对数据进行实时处理并捕获电弧特征点,从而精确识别电弧相位,实现在特定电弧相位对单脉冲激光的连续触发.提出了加锁触发思想,消除了激光的误触发,并实现了脉冲激光与电弧间的倍频关系及激光器的触发频率保护功能.结果表明,该系统实现了电弧特定相位与激光脉冲的精确触发控制,为脉冲激光与交流电弧能量的柔性复合以及两种热源相互作用机理研究提供了技术支持.

This article introduced a pulsed laser-arc hybrid welding phase matching control system based on Labview.Using NI's PCI6221 data acquisition card,the DAQ system acquired current of AC arc signal,processed the signal and capture the feature points of arc by the computer,thus accurately analyzed the phase of AC arc,and realized a continuous trigger control of pulsed laser on specific phase of AC arc. The locking trigger method was put forward,which eliminated the wrong trigger of laser,realized frequency doubling of pulsed laser and arc and trigger frequency protection of laser. The verifying experiment indicated that the system realized a accurately trigger control of specific phase of arc and the pulsed laser,and also provided the technical support of flexible combination of energy of pulsed laser and AC arc and the research on mechanism of interaction between the two heat resource.