RFID食品安全可追溯系统读取率优化策略研究

RFID食品安全可追溯系统应用的瓶颈之一是读取率问题.采用粗糙集理论渐进优化正交试验结果,对影响RFID系统读取率及读卡数的距离、偏离高度、速度、行数和列数等5个因素进行渐进正交试验优化,探索低成本RFID食品安全可追溯系统读取率及读卡数的优化策略.根据粗糙集理论的依赖度找出对读取率影响大的因素,重点搜索这些因素的水平值区间,反复调整水平值并进行正交试验,使结果逐渐逼近最优正交试验的水平组合.研究表明:粗糙集渐进优化正交试验方法能有效解决RFID系统读取率及读卡数的优化问题,读取率达到了99.3%以上.该成果为RFID系统的推广应用提供了有力的技术支持.

Optimal policy for read rate in RFID food safety traceability system

Read rate is one of the bottleneck problems in the RFID food safety traceability system application. In this paper, the results of orthogonal tests were optimized gradually by using the rough sets theory. The optimal orthogonal tests gradually were conducted to investigate a low-cost optimal policy for read rate and the number of read tags in RFID food safety traceability system for the five factors which are the distance, deviation height, speed, number of rows and columns. All of those factors influence the read rate and the number of read tags of RFID system. According to the dependence degree of the Rough Sets theory, the greatest factor that influences the read rate most could be found, and the range of the level values of these factors could be searched emphatically, then iteratively the level value could be adjusted and the orthogonal tests were carried out, until the optimum orthogonal test level combination could be obtained by the approaching method. The study indicates that the method of the rough sets theory for optimizing the orthogonal tests gradually would be of benefit to obtain a higher RFID read rate and the much more numbers of read tags, and the optimum read rate is not less than 99.3% by the tested RFID food safety traceability system, which provides a powerful technical support for spreading the application of the RFID system in food safety traceability system.