选冶在线分析仪属过程分析类仪器,用于选冶生产流程或其他相关工业现场.对设备的实时性分析和连续稳定工作能力要求较高.由于要为工业控制和调整提供快速、准确的分析结果,因而对设备的电磁兼容性能提出了更高的要求.基于选冶在线分析仪表控制单元的电磁性能,分析可能出现的干扰源和耦合路径,对敏感部位进行研究,分别提出了对直流电源控制端、10信号口和通讯端(RS232端、RS485端、RJ45网口端)的有效的电磁兼容性(EMC)设计方法,分析了该方法的工作原理及优点,并通过试验验证了方法的有效性,为在线分析仪表的电磁可靠性研究提供了参考.%Mining and metallurgy on-line analytical instrument belongs to process analysis instrument which are used in mining and metallurgy production process or other related industrial field.The equipment should have the ability of real-time analysis and continuous stable operation.Due to the demand for rapid and accurate analysis in the industrial control and adjustment,the electromagnetic compatibility of the equipment needs to meet high requirements.Based on electromagnetic performance of the control unit of mining and metallurgy on-line analytical instrument,this paper analyzes possible interference source and coupling path,researches on the sensitive parts,and then presents different electromagnetic compatibility (EMC) design method for the DC power supply as well as IO signal port and communication terminal (RS232,RS485,RJ45 Ethernet port).The working principle and the advantages are analyzed.Relevant EMC experiments are conducted to prove the effectiveness of the method.This paper provides a reference for the study of electromagnetic reliability of on-line analytical instrument.
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