焊接电源数字化人机交互系统设计研究

Design of digital human-machine interaction system for welding power source

针对超音频脉冲方波变极性TIG焊接电源人机交互系统存在的功能单一且操作不便等问题,提出了一种基于单片机和RS485总线技术的数字化人机交互系统。该系统以16位高性能微处理器PIC24FJ256GB106为控制核心,人机交互功能由支持Modbus协议的触摸屏实现。利用MAX485和光电耦合器设计出单片机和触摸屏之间接口电路,在MAPLAB集成开发环境下采用C语言编程完成了Modbus RTU传输模式的软件实现,并利用Easy Builder8000组态软件进行了HMI人机界面设计。焊接加工试验表明,该人机交互系统可对焊接参数进行便捷设置和调节,能够实时监测焊接状态参数,系统运行可靠,可以满足自动化焊接的需要。

Aiming at the problem of simple function and inconvenient operation in the human-machine interaction system of ultra-sonic fre- quency pulse square-wave TIG welding power, the digital human-machine interaction system based on Micro-processor and RS-485 bus tech- nology was developed. The 16-bit high performance Micro-processor named PIC24FJ256GB106 was used as the core controller, and the touchpad supporting MODBUS protocol was used to realize interaction function in the system. The interface circuit between microprocessor and touchpad was designed by using Max485 and optical coupler, the software design of MODBUS RTU transport mode was realized by using C language in the integrated development environment named MPLAB, and HMI interface was developed by Easy Builder8000 configuration software. The results indicate that the interaction system is convenient for setting and adjusting parameters, and can real-time monitor status parameters during welding process. The system has the merit of reliable and can meet the need of automotive welding.