基于复杂医疗设备的电源系统电磁兼容优化设计
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摘要
随着旧式医疗设备的更新换代和新型功能的医疗电子产品的推陈出新,这些设备在改善医疗水平的同时,也存在着严重的电磁兼容问题。针对不同医疗设备电源系统的电磁辐射容易引起本身以及其他医疗设备非正常启动或者关闭、测试结果失真等干扰问题,文中探究了医疗电子产品的电源系统的电磁兼容优化设计,分别从电源系统入口端电磁兼容设计和PCB板级电源系统电磁兼容优化设计两个方面,进行探究噪声抑制与降低干扰的方法。并通过具体医疗电子产品电源系统的电磁兼容设计进行验证。优化前,电磁干扰在低频段的幅度为80 dB左右;优化后,低频处的干扰降低到60 dB。验证了针对医疗仪器电源系统的电磁兼容设计的有效性。
With the replacement of old medical devices and the development of new-featured medical electronic products,these devices have serious electromagnetic compatibility problems while improving medical standards.The electromagnetic radiation of the power system of different medical equipment is easy to cause interference problems such as abnormal startup or shutdown of other medical equipment and the distortion of test results.The electromagnetic compatibility optimization design of the power supply system of medical electronic products is exploned.The methods of noise suppression and interference reduction are explored from two aspects:electromagnetic compatibility design at the inlet of the power system and electromagnetic compatibility optimization design of the PCB board power system.And through the electromagnetic compatibility design of the specific medical electronic product power system to verify.Before optimization,the amplitude of electromagnetic interference in the low frequency band is about 80 dB;after optimization,the interference at low frequency is reduced to 60 dB,which validated the effectiveness of EMC optimization measures for medical device power systems.
With the replacement of old medical devices and the development of new-featured medical electronic products,these devices have serious electromagnetic compatibility problems while improving medical standards.The electromagnetic radiation of the power system of different medical equipment is easy to cause interference problems such as abnormal startup or shutdown of other medical equipment and the distortion of test results.The electromagnetic compatibility optimization design of the power supply system of medical electronic products is exploned.The methods of noise suppression and interference reduction are explored from two aspects:electromagnetic compatibility design at the inlet of the power system and electromagnetic compatibility optimization design of the PCB board power system.And through the electromagnetic compatibility design of the specific medical electronic product power system to verify.Before optimization,the amplitude of electromagnetic interference in the low frequency band is about 80 dB;after optimization,the interference at low frequency is reduced to 60 dB,which validated the effectiveness of EMC optimization measures for medical device power systems.
引文
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[2] 方哲,郁滨,岳云天.串行传输线同步信号辐射发射模型研究[J].仪器仪表学报,2013,34(10):2373-2380.
[3] 胡卫东,李萍,彭煜.高频电磁防护织物屏蔽效能研究[J].电子科技,2013,26(9):92-94.
[4] 李冉,曾笑.低频多芯屏蔽线屏蔽特性测量方法初探[J].测绘通报,2014,(s1):70-73.
[5] 柯俊霄.舰船通信系统电磁干扰与干扰抑制[J].舰船科学技术,2015,37(5):172-174.
[6] 马敏.电磁兼容中辐射发射测试技术的研究[J].电子设计工程,2017,25(10):125-127.
[7] 韩迪,巨汉基,崔文武,等.基于LabVIEW的电磁兼容试验智能检测平台设计[J].自动化与仪器仪表,2018,(2):86-88.
[8] 李小亮,董雪峰.脉冲电容试验装置控制系统电磁兼容设计[J].电子设计工程,2016,24(4):134-136.
[9] Mark I.Montros.电磁兼容的印制电路板设计[M].北京:机械工业出版社,2013.
[10] 梁娟,周红霞,杨文菊.通信系统在强辐射干扰环境下的电磁兼容性能研究[J].自动化与仪器仪表,2017,(7):152-155.
[11] 陈骋,马晓岩,杨瑞娟,等.多功能电子系统电磁兼容任务调度方法[J].电子科技,2013,26(3):8-11.
[12] 杨桂恒,张瑞伟,钱希森,等.直流稳歷电源[M].北京:化学工业出版社,2010.
[13] 孙逊之.基于医疗电子产品的电源系统电磁兼容优化设计[D].南京:南京师范大学,2012.
[14] 谢如元,施佳林.PCB板时钟电路的电磁兼容设计[J].现代电子技术,2012,35(2):142-144.
[15] 练国辉.基于计算机主板高速PCB电磁兼容设计和应用[D].广州:华南理工大学,2012.
[16] 韩熙瑾.一种车载通信系统电磁兼容性测试验证方法[J].现代电子技术,2013,(9):161-164.