基于ZigBee的低功耗电子货架标签系统

发布时间：2018-03-27 09:53

本文选题：ZigBee　切入点：电子货架标签　出处：《华南理工大学》2014年硕士论文

【摘要】：纸质商品价格标签在商品销售中应用相当广泛。在大型超市里，商品种类繁多、信息更新较为频繁，纸质标签的管理、更新维护工作长期依赖人工操作，不仅效率低下，而且随着超市规模的扩大，商品种类的增加，其管理无序、混乱等矛盾也越发明显。当缺少监督或是操作人员疏忽时，容易出现商品标价错误的情况，影响日常销售活动，甚至破坏公司形象。针对目前超市价格标签更新维护工作涉及的信息量大、实时性及可靠性要求高的特点，同时也考虑到超市日常运作及系统部署成本等因素，本文旨在设计开发一款具备实时更新功能且成本低廉的无线电子价格标签系统，替代传统的纸质价格标签系统。ZigBee技术作为一种短距离通信技术，其低成本、低功耗、高可靠性的特点可以很好地满足电子标价牌系统的无线通信需求。本文首先根据超市的业务特点对无线电子货架标签系统ESL（Electronic Shelf Label）进行功能需求分析；其次在对比各种短距离无线通信技术的基础上深入分析ZigBee技术的原理及特点，设计开发出一套基于ZigBee协议栈BitCloud的低功耗电子货架标签系统。通过参数比较，选择AT91SAM3S4C作为协调器和路由器控制芯片，ATmega128rfa1作为终端节点控制芯片，OED电子纸作为标签显示模块，构成一个多路由大容量的Mesh网络。文中对BitCloud协议栈进行了较为详细的分析，给出了系统方案的总体架构、硬件设计和软件设计，对链路质量、通信距离、信号强度等参数进行性能测试和验证。并从软硬件两方面对系统能耗进行分析，，结果表明节点的信息更新周期、空闲时间与睡眠时间的比值与功耗息息相关，而减少通信流量、选用较低工作频率、较低工作电压亦能有效降低系统功耗。
[Abstract]:The paper commodity price label is widely used in the commodity sale. In the large supermarket, there are many kinds of goods, the information is updated frequently, the management and maintenance of the paper label depend on manual operation for a long time, so it is not only inefficient, but also inefficient. Moreover, with the expansion of the supermarket scale and the increase in the variety of commodities, the contradictions of its management disorder and confusion are becoming more and more obvious. When there is a lack of supervision or negligence of operators, it is easy to appear the wrong price of goods, which will affect the daily sales activities. Even tarnishing the image of the company. In view of the characteristics of large amount of information, high requirement of real-time and reliability, and taking into account the daily operation of supermarket and the cost of system deployment, etc. The purpose of this paper is to design and develop a wireless electronic price tag system with real-time updating function and low cost, which replaces the traditional paper-based price tag system .ZigBee as a short-range communication technology with low cost and low power consumption. The characteristics of high reliability can meet the wireless communication requirements of electronic price tag system. This paper firstly analyzes the function requirement of wireless electronic shelf label system (ESL(Electronic Shelf label) according to the business characteristics of supermarket, and then deeply analyzes the principle and characteristics of ZigBee technology on the basis of comparing various short-range wireless communication technologies. A low power electronic shelf label system based on ZigBee protocol stack BitCloud is designed and developed. Through parameter comparison, AT91SAM3S4C is selected as coordinator and router control chip ATmega128rfa1 as terminal node control chip ZigBee electronic paper as label display module. In this paper, the BitCloud protocol stack is analyzed in detail, and the overall architecture, hardware and software design, link quality and communication distance of the system are given. The signal strength and other parameters are tested and verified. The energy consumption of the system is analyzed from the aspects of software and hardware. The results show that the information update cycle, the ratio of idle time to sleep time and the power consumption are closely related to the power consumption, while the communication flow is reduced. Lower operating frequency and lower operating voltage can also effectively reduce the power consumption of the system.
【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN92

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