改进防碰撞算法在RFID考勤系统中的应用研究

目的解决目前一些基于RFID的考勤系统因标签碰撞造成数据识别率低、系统稳定性差等问题。方法对现有的RFID防碰撞算法进行了分析,在传统的帧时隙ALOHA防碰撞算法基础上,提出了一种改进的动态帧时隙ALOHA防碰撞算法。结果构建了基于RFID的考勤系统架构,实现了人员考勤信息的记录及防止代替签到情况的发生。此外,还给出了改进的RFID防碰撞算法的详细过程。结论改进算法能够让系统以高吞吐量工作,缩短了识别时间,提高了系统的整体性能。

Research on the application of improved anti-collision algorithm in RFID attendance system

Purposes—To solve some problems (like low data recognition rate and poor system sta-bility) in the current attendance system on the basis of RFID that are caused by tag collision .Meth-ods—The existing RFID anti-collision algorithm is analyzed .Based on the traditional frame slotted ALOHA anti-collision algorithm ,an improved dynamic frame slotted ALOHA anti-collision algorithm is proposed .Results—T he architecture of attendance system that is based on RFID is built ,thus re-cording the attendance information of personnel and preventing the occurrence of attendance .In addi-tion ,the detailed process of the improved RFID anti-collision algorithm is also given .Conclusions—Experiments show that the improved algorithm can make the system work with high throughput , shorten the recognition time ,and improve the overall performance of the system .