手持式气象仪电磁兼容性结构设计  

Electromagnetic Compatibility Structure Design of Hand-held Meteorological Instrument

作　　者：李佑武 汪辉 杨中平 严伟[1] 孙达松 黄义国 Li Youwu;Wang Hui;Yang Zhongping

机构地区：[1]江苏无线电厂有限公司 [2]陆军研究院五所

出　　处：《安全与电磁兼容》2022年第2期54-58,共5页Safety & EMC

摘　　要：为确保手持式气象仪在复杂电磁环境中正常工作,结合电磁兼容性指标要求及其结构形式进行了具体的电磁兼容性结构设计。对主要结构零件的选材进行了分析,对比了铝合金、镁铝合金两种材料对地磁场的屏蔽效能,设计估算了零件孔洞的屏蔽效能,并通过在显示屏上增加透明的聚氨酯导电薄膜、对结构件结合面做电磁屏蔽处理等措施,进一步提高了手持式气象仪的电磁兼容性。实际使用及测试表明,镁铝合金(AZ91D)相比铝合金能更好的满足电子罗盘的使用场景,针对样机所采取的各项电磁兼容性技术措施有效,手持式气象仪样机能很好的满足GJB 151B-2013中的电磁兼容性指标要求。To ensure the normal operation of the hand-held meteorological instrument in complex electromagnetic environment,combined with the requirements of electromagnetic compatibility index and its structure form,the specific electromagnetic compatibility structure design is carried out.This paper analyzes the material selection of main structural parts,compares the shielding effectiveness of aluminum alloy and magnesium aluminum alloy to earth magnetic field,designs and estimates the shielding effectiveness of the holes on parts,and further improves electromagnetic compatibility of the hand-held meteorological instrument by adding transparent polyurethane conductive film on the display screen and electromagnetic shielding on the bonding surface of structural parts.The actual use and test show that magnesium aluminum alloy is better than aluminum alloy to meet the use of electronic compass scenarios.The technical measures taken to ensure the EMC requirements of the prototype are effective,the prototype can well meet the EMC requirements in GJB 151B-2013.

关 键 词：手持式气象仪 电磁兼容 电磁屏蔽 结构设计 GJB 151B-2013 

分 类 号：TN03[电子电信—物理电子学]