针对短路过渡CO2焊接电源电子控制系统元件较多、参数调节较难、控制灵活性和精确性较差等缺点,设计了一种基于ARM_Linux的逆变式CO2焊接电源波形控制系统。该系统以S3C2440微处理器作为核心控制芯片,采用增量式PI运算程序软件,实现了短路过渡CO2焊接过程焊接电压和焊接电流的波形控制。在S3C2440中,对Linux系统底层文件进行裁减和移植后,应用层控制主程序派生三个子进程,分别控制焊接任务、基于Qt的人机交互界面、远程网络通讯,同时利用有名管道(FIFO)实现进程间通信。 Aiming at shortcoming of many components of electronic control system of short-circuit transition CO2 welding power source, difficult parameter adjustment, poor control flexibility and accuracy, a kind of inverting CO2 welding power waveform control system based on ARM_Linux was designed. The system S3C2440 microprocessor as the core control chip, using incremental PI computing software to achieve a short-circuit CO2 welding process welding voltage and welding current waveform control. In the S3C2440, after the bottom of the Linux system to reduce and transplant files, the application-level control of the main program derived three sub-processes, respectively, control the welding tasks, based on the Qt interface, remote network communications, while using the famous pipeline (FIFO) Inter-process communication.