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本文介绍北京正负电子对撞机人身安全联锁系统的改进，主要叙述了人身安全联锁的要求和新系统方案的确定。改进后的新系统不仅提高了可靠性、增强了系统的可维护性及信息传递的准确性，还实现了人身安全联锁系统与中央安全联锁系统的联网通讯
This article introduces the improvement of personal safety interlocking system of Beijing Electron Positron Collider. It mainly describes the requirements of personal safety interlock and the determination of new system plan. The improved new system not only improves the reliability, enhances the maintainability of the system and the accuracy of information transmission, but also realizes the networking communication between the personal safety interlock system and the central safety interlock system