基于总线技术的防电磁三防信号屏设计

MA Xinbao LIU Fei LI Jian WU Zhongjian XIE Weiwei

摘要:

针对防护工程屏蔽室外的微电子显示设备电磁防护措施薄弱的现状,开展了信号屏防护技术研究,介绍了一种总线式防电磁三防信号屏的设计方案和实现技术。解决了两项关键技术：三防信号屏总线通信和显示类设备防电磁设计。

Abstract:

Aiming at the problems of weak electromagnetic protection measures, laying of cable difficulty and low reliability existing in three-protection signal screen in underground engineering, the research of bus communication technology for signal screen is carried out, and a kind of bus communication card is developed to realize the conversion from hard to soft. The shielding film is applied to the design of the electromagnetic protection of the signal screen. A kind of display screen “sandwich” structure and a whole package process are presented, and the sample is developed. Finally, the overall shielding effectiveness of the shell is tested by three conditions, and the experimental results show that the overall shielding efficiency of the shell is improved remarkably, the shielding shell of single-layer shielding film can reach the third level of electromagnetic protection, and the shielding effect of double-layer shielding film is better.