基于WiFi的食品溯源电子秤系统的研究与设计

发布时间：2019-06-24 23:44

【摘要】：随着人民生活水平的提高,食品质量安全越来越受到人民的重视,网络的普及以及微博、论坛等自媒体的兴起,食品安全事件的频发更加引起人民对食品质量安全的关注。如何保证食品质量安全已经成为中国乃至世界的重要课题,建立和完善食品安全追溯系统,是快速有效地解决中国的食品安全问题的一个重要手段。在现有食品质量安全追溯方法中,追溯系统没有将消费者个人信息和所购食品信息进行绑定。因此,监管平台难以追踪食品最终流向,而消费者一般没有保存追溯小票的习惯,一旦食品安全事件发生,监管部门和销售商家则无法及时通知消费者,难以迅速控制事态的发展,消费者也可能因此遭受巨大损失。针对现有食品质量安全追溯方法的缺陷,本文提出了一种新的食品质量安全追溯方法。该方法不仅能够提高现有食品追溯方法的精确性,而且还将现有食品安全追溯方法由被动追溯变成主动追溯,增强了食品安全预警机制。本文在介绍了新的食品质量安全追溯方法后,针对该追溯方法中的消费环节,设计了一种基于WiFi的食品溯源电子秤系统作为销售终端使用。首先,本文完成了食品溯源电子秤系统的电路设计,这些电路主要包括主控模块电路、存储模块电路、RFID模块电路、NFC模块电路、WiFi模块电路、其他模块接口电路、电源电路。其次,在研究了WiFi组网技术的基础上,完成了一种适合该食品溯源电子秤的WiFi网络拓扑结构设计。再次,完成了食品溯源电子秤的程序设计,这些程序包括主程序、称重数据采集子程序、一维码和二维码读取子程序、RFID模块读写子程序、NFC模块读写子程序、主动溯源子程序、WiFi模块子程序。其中,在WiFi模块子程序设计中,制定了卖家商品入库信息帧和消费者结账信息帧,作为食品溯源电子秤和食品溯源工作站的通信协议使用。最后,本文对WiFi组网进行了实验验证,结果表明:WiFi技术能够满足食品溯源电子秤数据传输,整个食品溯源电子秤WiFi网络是可行的。本文主要有以下创新点:1、提出了食品主动溯源方法;2、将一维码、二维码、RFID、NFC、嵌入式、WiFi等技术集成到了溯源电子秤上;3、对WiFi的基础网进行了拓展,达到了自组网效果。
[Abstract]:With the improvement of people's living standards, food quality and safety have been paid more and more attention by the people. With the popularity of the network and the rise of Weibo, forums and other media, the frequent occurrence of food safety events has attracted people's attention to food quality and safety. How to ensure food quality and safety has become an important issue in China and even the world. The establishment and improvement of food safety traceability system is an important means to solve the food safety problems in China quickly and effectively. In the existing food quality and safety traceability methods, the traceability system does not bind consumer personal information with purchased food information. As a result, it is difficult for regulatory platforms to track the final flow of food, and consumers generally do not have the habit of keeping traceable tickets. In the event of food safety incidents, regulators and sellers are unable to notify consumers in a timely manner, and it is difficult to control developments quickly, and consumers may also suffer huge losses as a result. In view of the defects of the existing food quality and safety traceability methods, a new food quality and safety traceability method is proposed in this paper. This method can not only improve the accuracy of the existing food traceability methods, but also change the existing food safety traceability methods from passive traceability to active traceability, which enhances the food safety early warning mechanism. After introducing the new food quality and safety traceability method, this paper designs a food traceability electronic scale system based on WiFi as the sales terminal according to the consumption link of the traceability method. First of all, this paper completes the circuit design of food traceability electronic scale system, which mainly includes main control module circuit, memory module circuit, RFID module circuit, NFC module circuit, WiFi module circuit, other module interface circuit, power supply circuit. Secondly, based on the study of WiFi networking technology, a WiFi network topology design suitable for the food traceability electronic scale is completed. Thirdly, the program design of food traceability electronic scale is completed, including the main program, weighing data acquisition subroutine, one-dimensional code and QR code reading subroutine, RFID module reading and writing subroutine, NFC module reading and writing subroutine, active traceability subroutine, WiFi module subroutine. Among them, in the subprogram design of WiFi module, the seller commodity storage information frame and consumer checkout information frame are worked out, which are used as the communication protocol of food traceability electronic scale and food traceability workstation. Finally, the experimental results of WiFi network show that WiFi technology can meet the data transmission of food traceability electronic scale, and the whole WiFi network of food traceability electronic scale is feasible. The main innovations of this paper are as follows: 1, the active traceability method of food is put forward; 2, the one-dimensional code, QR code, RFID,NFC, embedded technology, WiFi and other technologies are integrated into the traceability electronic scale; 3, the basic network of WiFi is expanded to achieve the effect of ad hoc network.
【学位授予单位】：湖南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TS201.6;TH715.193

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