【摘要】 针对微机控制脉冲MIG焊机控制系统抗干扰问题进行了研究设计.系统分析了可能影响焊机正常工作的各种干扰产生的原因,并在电路设计、PCB制作及程序编制的过程中采取了相应的措施.其中硬件措施有屏蔽技术、去耦技术、滤波技术、隔离技术及接地技术等;软件措施有看门狗、冗余指令和数字滤波等.实践证明这些措施解决了控制系统的干扰问题.更多还原

【Abstract】 The antiinterference technique for a pulsed MIG welding controlled by microcomputer is developed. The possible origins of abnormal operation of welding are analyzed. On the basis of analysis some measures are taken in the circuit design, PCB making, and programming. The hardwares include shield, decoupling, filter, isolation, and grounding. Software include watchdog, redundant instruction, and digital filtering. Testing results show that these measures can solve the problem of interference which influences the control system.更多还原