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農(nóng)產(chǎn)品冷鏈運(yùn)輸WSN監(jiān)測(cè)系統(tǒng)設(shè)計(jì)與實(shí)現(xiàn)

發(fā)布時(shí)間:2018-11-02 11:57
【摘要】:目前,隨著我國(guó)人民食品安全意識(shí)的提高,農(nóng)產(chǎn)品需要更完善的冷鏈物流監(jiān)測(cè)系統(tǒng)去保證其質(zhì)量安全,其中運(yùn)輸環(huán)節(jié)的監(jiān)測(cè)一直是冷鏈過(guò)程中監(jiān)管最薄弱的環(huán)節(jié)。針對(duì)冷鏈運(yùn)輸環(huán)境監(jiān)測(cè)困難這一問(wèn)題,本文設(shè)計(jì)了一種基于WSN技術(shù)的監(jiān)測(cè)系統(tǒng),實(shí)現(xiàn)了對(duì)冷藏車(chē)廂內(nèi)環(huán)境信息的實(shí)時(shí)感知,達(dá)到了對(duì)農(nóng)產(chǎn)品運(yùn)輸環(huán)節(jié)的監(jiān)測(cè)功能。本文主要研究?jī)?nèi)容如下: (1)綜述了國(guó)內(nèi)外對(duì)冷鏈監(jiān)測(cè)技術(shù)的研究,分析了農(nóng)產(chǎn)品冷鏈物流過(guò)程監(jiān)測(cè)的現(xiàn)狀和需求,對(duì)比了各種短距離無(wú)線(xiàn)通信技術(shù)和網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)優(yōu)劣,選用ZigBee技術(shù)和星狀網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)搭建無(wú)線(xiàn)傳感器網(wǎng)絡(luò),提出了農(nóng)產(chǎn)品冷鏈運(yùn)輸監(jiān)測(cè)系統(tǒng)的功能設(shè)計(jì)方案。 (2)完成了感知節(jié)點(diǎn)和匯聚節(jié)點(diǎn)的設(shè)計(jì)。感知節(jié)點(diǎn)基于CC2530片上系統(tǒng)和SHT15傳感器開(kāi)發(fā),實(shí)現(xiàn)了對(duì)車(chē)廂溫濕度信息的采集,并且添加了對(duì)節(jié)點(diǎn)剩余電量的監(jiān)測(cè);匯聚節(jié)點(diǎn)基于CC2530搭建,配有液晶屏顯示模塊和串口通信模塊,實(shí)現(xiàn)了數(shù)據(jù)的顯示與上傳。節(jié)點(diǎn)軟件設(shè)計(jì)采用Z-Stack協(xié)議棧,通過(guò)對(duì)協(xié)議棧的優(yōu)化實(shí)現(xiàn)了數(shù)據(jù)的采集、傳輸和顯示。 (3)完成了監(jiān)測(cè)軟件設(shè)計(jì)。冷鏈運(yùn)輸監(jiān)測(cè)系統(tǒng)軟件基于LabVIEW開(kāi)發(fā),實(shí)現(xiàn)了對(duì)采集數(shù)據(jù)的處理、分析與保存,通過(guò)添加報(bào)警模塊實(shí)現(xiàn)了系統(tǒng)的預(yù)警功能。 (4)通過(guò)系統(tǒng)測(cè)試驗(yàn)證了監(jiān)測(cè)系統(tǒng)能夠正常工作。設(shè)計(jì)了節(jié)點(diǎn)通信性能測(cè)試和冷鏈運(yùn)輸適用性測(cè)試,了解了不同通信頻段的節(jié)點(diǎn)在冷鏈運(yùn)輸過(guò)程中的傳輸特性,為節(jié)點(diǎn)有效部署提供數(shù)據(jù)支持。 實(shí)際應(yīng)用測(cè)試表明,節(jié)點(diǎn)硬件具有成本低、集成度高、功耗低的特點(diǎn),無(wú)線(xiàn)通信具有可靠性高、穩(wěn)定性強(qiáng)的特點(diǎn),系統(tǒng)在冷鏈運(yùn)輸過(guò)程中采集數(shù)據(jù)準(zhǔn)確性高,達(dá)到了實(shí)時(shí)監(jiān)測(cè)的功能,,可以應(yīng)用于農(nóng)產(chǎn)品冷鏈運(yùn)輸全過(guò)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.
【學(xué)位授予單位】:西北農(nóng)林科技大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類(lèi)號(hào)】:TP212.9;TN92;TP274

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