【摘要】 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更多还原

【Abstract】 This paper describes the improvement in the personnel security interlock system of Beijing Electron Positron Collider. The paper mainly shows the requirements of personnel security interlock and the determination of new system′s program. The new system not only improves reliability, maintenance of the system and accuracy for messages transmission, but also realizes computer communication between Personnel Security Interlock System and Central Security Interlock System. (更多还原