数字仪表的干扰因素分析及控制措施研究  

Interference factors analysis and control measures of digital instrument

作　　者：王馨梓 WANG Xinzi(Gansu provincial Institute of Metrology,Lanzhou 730000,China)

机构地区：[1]甘肃省计量研究院,甘肃兰州730000

出　　处：《工业计量》2024年第2期112-115,共4页Industrial Metrology

摘　　要：数字仪表是中国工业生产领域中应用频率最高、应用范围最大的测量仪器,其准确可靠对工业生产质量和生产效率具有重要影响,在热工计量领域尤为重要。该类仪表大多使用热电传感器元件将被测温度转换为电信号,然而电信号在传输过程中会受到各类电磁干扰,对测量结果的准确度产生影响。文章主要针对数字仪表的电磁干扰问题进行分析,提出对于串联干扰,采用扭绞信号线、屏蔽以及滤波的方法进行抑制;对于共模干扰,采用接地、连接地面和屏蔽层以及应用悬浮技术的方法进行抑制,经实验验证,可以有效抑制热工计量数字仪表的电磁干扰。The most popular and commonly utilized measuring tool in China's industrial production sector is the digital instrument.The quality and efficiency of industrial output are significantly impacted by its accuracy and dependability,which is crucial in the field of thermal metering.The majority of these instruments turn the observed temperature into electrical signals using thermometric sensor components.The accuracy of the measurement results is impacted by the different electromagnetic interference that electrical signals are subject to during transmission.In particular,this study studies the issue of electromagnetic interference that affects digital temperature monitoring instruments and makes a suggestion for how to reduce series interference using signal line twisting,shielding,and filtering.Grounding,connecting ground,shielding layers,and suspension technology are utilized to reduce common-mode interference.The experimental findings demonstrate that it is possible to efficiently reduce the electromagnetic interference of digital temperature sensor equipment.

关 键 词：热工计量 数字仪表 干扰问题 控制措施 

分 类 号：TH70[机械工程—仪器科学与技术]