大功率中频逆变电阻焊机人机界面设计

摘要

针对基于ARM、DSP和CPLD相结合控制的大功率中频逆变电阻焊机,选择PIC24FJ128GA010单片机、键盘输入和液晶显示,采用上、下位机的方式,设计了数字化人机界面系统.该系统能实现焊接参数、规范的读取和设置,具有通信失败原因显示、故障复位、报警复位等功能,有三种用户类型可供选择,具有不同的操作权限,采用RS232方式与下位机通信.下位机反应时间的协调是影响系统稳定可靠操作的关键.实验证明,该系统运行稳定,操作灵活,界面友好,抗干扰能力强.%Aiming at high power medium frequency inverting resistance welder based on ARM,DSP and CPLD.a digital man-machine interface which is consisted of PIC24FJ128GA010, keyboard entry,LCD display and employs upper-lower computer mode is designed.This system realizes reading and setting for welding parameters and norms, displaying cause of communication failure, fault reset,alarm reset etc.There are three types of users which have different operation authority and it communicates with lower computer by RS232.The cooperation of reaction time of lower computer is the key to influence the stability and reliability of operation.lt proves reliable,flexible,friendly and compatible.