农产品冷链运输WSN监测系统设计与实现

发布时间：2018-11-02 11:57

【摘要】：目前，随着我国人民食品安全意识的提高，农产品需要更完善的冷链物流监测系统去保证其质量安全，其中运输环节的监测一直是冷链过程中监管最薄弱的环节。针对冷链运输环境监测困难这一问题，本文设计了一种基于WSN技术的监测系统，实现了对冷藏车厢内环境信息的实时感知，达到了对农产品运输环节的监测功能。本文主要研究内容如下：（1）综述了国内外对冷链监测技术的研究，分析了农产品冷链物流过程监测的现状和需求，对比了各种短距离无线通信技术和网络拓扑结构优劣，选用ZigBee技术和星状网络拓扑结构搭建无线传感器网络，提出了农产品冷链运输监测系统的功能设计方案。（2）完成了感知节点和汇聚节点的设计。感知节点基于CC2530片上系统和SHT15传感器开发，实现了对车厢温湿度信息的采集，并且添加了对节点剩余电量的监测；汇聚节点基于CC2530搭建，配有液晶屏显示模块和串口通信模块，实现了数据的显示与上传。节点软件设计采用Z-Stack协议栈，通过对协议栈的优化实现了数据的采集、传输和显示。（3）完成了监测软件设计。冷链运输监测系统软件基于LabVIEW开发，实现了对采集数据的处理、分析与保存，通过添加报警模块实现了系统的预警功能。（4）通过系统测试验证了监测系统能够正常工作。设计了节点通信性能测试和冷链运输适用性测试，了解了不同通信频段的节点在冷链运输过程中的传输特性，为节点有效部署提供数据支持。实际应用测试表明，节点硬件具有成本低、集成度高、功耗低的特点，无线通信具有可靠性高、稳定性强的特点，系统在冷链运输过程中采集数据准确性高，达到了实时监测的功能，，可以应用于农产品冷链运输全过程。
[Abstract]:At present, with the improvement of the awareness of food safety, agricultural products need a more perfect cold chain logistics monitoring system to ensure its quality and safety, among which the monitoring of transportation links has been the weakest link in the process of cold chain supervision. Aiming at the difficulty of cold chain transportation environment monitoring, a monitoring system based on WSN technology is designed in this paper, which realizes the real-time perception of environmental information in refrigerated cars and achieves the function of monitoring agricultural product transportation links. The main contents of this paper are as follows: (1) the research on cold chain monitoring technology at home and abroad is reviewed, and the current situation and demand of cold chain logistics process monitoring for agricultural products are analyzed. The advantages and disadvantages of various short-range wireless communication technologies and network topologies are compared. ZigBee technology and star network topology are selected to build wireless sensor networks, and the function design scheme of cold chain transportation monitoring system for agricultural products is proposed. (2) the design of sensing node and convergence node is completed. The sensing node is based on the system on CC2530 chip and the SHT15 sensor to realize the collection of the temperature and humidity information of the car, and the monitoring of the residual electricity quantity of the node is added. The convergent node is built based on CC2530 with LCD display module and serial communication module to realize data display and upload. The node software is designed with Z-Stack protocol stack, and the data collection, transmission and display are realized by optimizing the protocol stack. (3) the design of monitoring software is completed. The software of the cold chain transportation monitoring system is developed based on LabVIEW, which realizes the processing, analysis and preservation of the collected data. The warning function of the system is realized by adding the alarm module. (4) the system test proves that the monitoring system can work normally. Design node communication performance test and cold chain transport applicability test, understand the transmission characteristics of nodes in different communication frequency bands in the cold chain transport process, and provide data support for node effective deployment. The practical application shows that the node hardware has the characteristics of low cost, high integration, low power consumption, high reliability and strong stability of wireless communication, and the accuracy of collecting data in the process of cold chain transportation is high. It achieves the function of real-time monitoring and can be used in the whole process of cold chain transportation of agricultural products.
【学位授予单位】：西北农林科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TP212.9;TN92;TP274

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