摘要
在农产品质量溯源中采用批量标签识别可极大提高系统效率。然而,基于成本和使用寿命的考虑,目前在溯源系统中使用射频标签通常选择无源标签,标签之间缺乏协作通道,不可避免会发生标签碰撞。该研究设计了基于射频识别技术的农产品追溯系统,针对所设计的追溯系统应用环境,提出一种可自适应动态调整帧长度的动态帧时隙Aloha标签防碰撞方法。只需在第一帧识别后,利用统计得到的首帧成功时隙、空闲时隙和碰撞时隙数对初始标签规模进行估计,并据此优化调整后续帧长度,实现最优识别。仿真结果表明,提出的防碰撞算法应用于所设计的农产品追溯系统,识别效率得到了显著提高,与目前广泛使用的国际标准相比,全局吞吐量性能提高了30%以上。
The efficiency of the system could be greatly improved by using the Radio Frequency Identification(RFID)batch tag identification in the quality traceability of agricultural products.In this study,a tracing system of agricultural products based on RFID technology was designed.This system consisted of a tracking subsystem that was from the planting side to the consumption side and a tracking subsystem that was from the consumption side to the planting side.This system designed the information processing process of agricultural product planting,storage information processing,transportation information processing,distribution and distribution information processing,and terminal consumption information processing.This system also designed a three-level Internet of things architecture.Compared with the traditional agricultural product traceability system based on bar code,the one based on RFID technology was more flexible and accurate and had a better application prospect.In the agricultural product traceability system,especially in the courses of delivery and storage,batch identification of an entire truck of product tags needed to be conducted inbound and outbound.For frequently used forklift transport,entire tags attached to products in a forklift also needed to be identified simultaneously so that automatic rapid processing of transport,loading,and allocation of warehouse location could be accomplished.Batch tag identification was the most obvious advantage of RFID,but it would produce tag signal interference with each other and result in tag collision.Therefore,the anti-collision method was the key technology to the agricultural product traceability system.In this study,a model of agricultural product traceability system based on radio frequency identification technology was established,and the implementation of the storage link was presented.In the process of traceability,batch identification of an entire truck or forklift of the agricultural product greatly improved the management efficiency and shortened the ci
作者
王祖良
郭建新
张婷
李文臣
曹闯乐
于洪涛
Wang Zuliang;Guo Jianxin;Zhang Ting;Li Wenchen;Cao Chuangle;Yu Hongtao(School of Information Engineering,Xijing University,Xi’an 710123,China)
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2020年第10期150-157,共8页
Transactions of the Chinese Society of Agricultural Engineering
基金
陕西省重点研发计划重点项目(2018ZDXM-NY-014)
陕西省技术创新引导专项(基金)项目(2020CGXNG-035)
西安市科技计划项目(201805043YD21CG27(1),2019218414GXRC020CG021-GXYD20.6)
西京学院高层次基金项目(XJ17B06)。
关键词
农产品
溯源
标签
批量识别
防碰撞
全局吞吐量
agriculture products
traceability
tags
batch identification
anti-collision
global throughput
