脉冲熔化极气体保护焊电源故障诊断设计

Design of failures monitoring system in pulsed gas melted arc welding power source

摘要: 脉冲熔化极气体保护焊(GMAW-P)焊接电源多采用数字控制技术,为保证焊机安全、可靠地运行,提高故障诊断的效率及可靠性,将分层控制-故障树故障诊断方法融入焊接电源设计中,针对焊接过程中可能出现的异常和故障情况,根据其危害等级的不同,进行分级并采用不同的处理方法和有效的指导原则,可以有效的节约数字控制处理器的软件资源,实现对异常的快速响应与处理,达到保护焊接电源的目的.构建了GMAW-P焊接电源故障树模型,分析了故障传播的逻辑关系,有效解决了故障诊断的层次化、有序化.结果表明,所设计的焊接电源的故障诊断系统容错性及适应性好,增强了故障检测与诊断的实时性和开放性,为焊接电源智能故障诊断开辟了新的途径.

Abstract: In order to solve the problem of diagnosing welding power source and ensure the safety, the fault tree of GMAW-P welding power source system is built and the hierarchical control technology is used.Modules of fault trees can be used to reduce the computational cost of basic operation.The result shows that this method is easily to be processed by the computer, and the efficiency of diagnosis is improved.The result of this new failures monitoring system shows that the intelligence of welding power source is improved and it has wide applicatious.