本文關(guān)鍵詞： mesh網(wǎng)絡(luò) 改進(jìn)路由協(xié)議 大容量網(wǎng)絡(luò) 后臺(tái)管理系統(tǒng) 電子貨架標(biāo)簽　出處：《河南師范大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：無論是在單位面積超過3000平方米的大賣場(chǎng)里,還是單店規(guī)模在300平方米左右的超市里,商品標(biāo)價(jià)牌在各類規(guī)模的超市商品銷售領(lǐng)域中都有大量的應(yīng)用需求,可以及時(shí)更新商品的價(jià)格明細(xì)、保質(zhì)期、條形碼,明確打折促銷信息等等,極大程度的方便了顧客的購(gòu)物需求。傳統(tǒng)的商品標(biāo)價(jià)牌皆為紙質(zhì)制作,雖然成本較低,但是在管理維護(hù)方面存在很多的弊端,尤其是在超市規(guī)模較大,商品種類較多,更新需求較為頻繁的時(shí)候,需要大量的人力物力去跟進(jìn),且極容易由于疏忽或者信息傳遞不到位,出現(xiàn)錯(cuò)標(biāo),漏標(biāo)的情況,一方面可能損害公司利益,讓公司形象大打折扣,另一方面將影響顧客的購(gòu)物體驗(yàn)。貨架標(biāo)簽的發(fā)展和改進(jìn)經(jīng)歷了非常漫長(zhǎng)曲折的階段。最先投用在電子貨架標(biāo)簽系統(tǒng)上的是RFID(射頻識(shí)別技術(shù)),通過閱讀器-服務(wù)器-發(fā)送指令的過程來對(duì)各類商品信息進(jìn)行更新改動(dòng)并且保存,這種方法存在很多弊端,組網(wǎng)系統(tǒng)容易崩潰,且成本太高。在后期的發(fā)展中,逐漸使用MCU(微控制單元)來代替上述技術(shù)中閱讀器的作用,這樣使得讀寫更加方便,同時(shí)利用ZigBee技術(shù)可以設(shè)置不同的睡眠模式來控制功耗,減小成本,但是缺點(diǎn)在于容易掉網(wǎng),且一旦有掉網(wǎng)故障的話,不容易被發(fā)現(xiàn)解決,針對(duì)上述兩種技術(shù)所存在的種種弊端,本文旨在設(shè)計(jì)一套基于mesh網(wǎng)絡(luò)的大容量電子貨架標(biāo)簽系統(tǒng),該系統(tǒng)不但具備自動(dòng)實(shí)時(shí)更新價(jià)碼信息的功能,而且具有節(jié)點(diǎn)眾多、網(wǎng)絡(luò)容量大的特點(diǎn),同時(shí)搭建的網(wǎng)絡(luò)自組網(wǎng)修復(fù)能力很好,完全可以滿足商場(chǎng)對(duì)電子貨架標(biāo)簽系統(tǒng)的各項(xiàng)要求。本文先通過對(duì)各種短距離無線通信技術(shù)的優(yōu)缺點(diǎn)進(jìn)行比較分析,選定ZigBee技術(shù)作為組建無線網(wǎng)絡(luò)的主要技術(shù),然后對(duì)市場(chǎng)主流芯片的參數(shù)比較選定CC2530f256作為主要芯片,選定IAR Embedded Workbench 8.1.0相對(duì)應(yīng)的協(xié)議棧Z-Stack 2.5.1來進(jìn)行配套使用。其次對(duì)軟件和硬件進(jìn)行設(shè)計(jì)分析,提出系統(tǒng)的總體設(shè)計(jì)結(jié)構(gòu),采用路由協(xié)議的改進(jìn)方法后,對(duì)網(wǎng)絡(luò)的參數(shù)RSSI(接收信號(hào)強(qiáng)度)、LQI(信號(hào)連接質(zhì)量)等參數(shù)進(jìn)行性能測(cè)試和驗(yàn)證,首先通過在一定區(qū)間測(cè)出RSSI(在0-28之內(nèi))與接收功率之間的實(shí)際關(guān)系,并且在得到兩者之間的關(guān)系后,用Origin(函數(shù)繪制軟件)進(jìn)行數(shù)據(jù)處理,最后得出實(shí)際測(cè)得數(shù)據(jù)與理想改進(jìn)網(wǎng)絡(luò)之后數(shù)據(jù)基本相吻合,從而驗(yàn)證改進(jìn)之后的網(wǎng)絡(luò)接收強(qiáng)度有所提高;第二步通過在分析一定區(qū)間內(nèi)實(shí)際測(cè)出LQI與接收功率之間的關(guān)系,同樣同Origin函數(shù)繪制軟件進(jìn)行數(shù)據(jù)處理驗(yàn)證得出實(shí)驗(yàn)結(jié)果的優(yōu)越性;第三步用Sniffer(抓包軟件)來測(cè)試實(shí)際所接收到的數(shù)據(jù)幀、誤碼率、丟包率,通過對(duì)比理想數(shù)據(jù)曲線與實(shí)測(cè)數(shù)據(jù)曲線擬合關(guān)系,最終驗(yàn)證了實(shí)驗(yàn)結(jié)果已經(jīng)達(dá)到預(yù)期目的。在文章的結(jié)尾提出工作總結(jié)與不足之處,展望下一步發(fā)展的方向和目標(biāo)。
[Abstract]:Whether in a large store with a unit area of more than 3000 square meters or a supermarket with a single store size of about 300 square meters, there is a large demand for price tags in the field of commodity sales in supermarkets of all sizes. It can update the price details, shelf life, bar code, clear discount promotion information and so on, which greatly facilitates the customer's shopping demand. The traditional price tag is all made on paper, although the cost is relatively low. However, there are many disadvantages in the management and maintenance, especially when the supermarket is large in scale, there are many kinds of commodities, and the demand for renewal is more frequent, it needs a lot of manpower and material resources to follow up. Moreover, it is very easy for the company to be negligent or because the information transmission is not in place, so that the wrong mark or missing mark will appear. On the one hand, it may harm the interests of the company and greatly reduce the company's image. On the other hand, it will affect the customer's shopping experience. The development and improvement of the shelf label has gone through a very long and tortuous stage. The first used in the electronic shelf label system is RFID (radio frequency identification technology), through reader and service. Device-the process of sending instructions to update and change all kinds of commodity information and save it. There are many disadvantages in this method, the networking system is easy to crash, and the cost is too high. In the later development, MCU (micro-control unit) was gradually used to replace the function of reader in the above technology, which makes reading and writing more convenient. At the same time, using ZigBee technology can set up different sleep modes to control power consumption and reduce the cost, but the disadvantage is that it is easy to lose the network, and once there is a network failure, it is not easy to be found and solved. The purpose of this paper is to design a large capacity electronic shelf label system based on mesh network. The system not only has the function of automatically updating the price code information in real time, but also has the characteristics of numerous nodes and large network capacity. At the same time, the repair ability of the self-organizing network is very good, and it can completely meet the requirements of the electronic shelf label system. Firstly, the advantages and disadvantages of various short-range wireless communication technologies are compared and analyzed in this paper. ZigBee technology is chosen as the main technology to build wireless network, and then CC2530f256 is chosen as the main chip to compare the parameters of mainstream chips in the market. The protocol stack Z-Stack 2.5.1 corresponding to IAR Embedded Workbench 8.1.0 is selected for matching use. Secondly, the software and hardware are designed and analyzed, the overall design structure of the system is put forward, and the improved routing protocol is adopted. The performance of the network parameters RSSI (received signal strength and LQI) is tested and verified. Firstly, the actual relationship between RSSI (within 0-28) and receiving power is measured in a certain range. And after getting the relationship between the two, the original (function drawing software) is used to process the data. Finally, it is concluded that the actual measured data basically coincide with the data after the ideal improved network, so as to verify the improved network receiving strength has been improved; In the second step, the relationship between the LQI and the received power is measured in a certain interval, and the superiority of the experimental results is verified with the data processing software of the Origin function rendering software. The third step is to test the actual data frame, bit error rate and packet loss rate by using sniffer. by comparing the fitting relationship between ideal data curve and measured data curve, At the end of the paper, the author puts forward the summary and deficiency of the work, and looks forward to the direction and goal of the next development.
【學(xué)位授予單位】：河南師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TN873;TN92

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