本文選題：農(nóng)業(yè)機(jī)械 + 數(shù)據(jù)傳輸　； 參考：《農(nóng)業(yè)工程學(xué)報(bào)》2014年13期

【摘要】：為解決通訊環(huán)境較差的農(nóng)業(yè)機(jī)械作業(yè)狀態(tài)數(shù)據(jù)的傳輸難題,該文提出了基于改進(jìn)Huffman編碼技術(shù)的數(shù)據(jù)壓縮方法實(shí)現(xiàn)數(shù)據(jù)的壓縮、傳輸、解析與解壓。數(shù)據(jù)壓縮與解壓測(cè)試的結(jié)果表明,數(shù)據(jù)采集周期為5 s、數(shù)據(jù)長(zhǎng)度為918.38 kb時(shí),基于改進(jìn)Huffman算法壓縮的數(shù)據(jù)長(zhǎng)度為412.56 kb,同樣條件下對(duì)比傳統(tǒng)Huffman算法壓縮的數(shù)據(jù)長(zhǎng)度498.56 kb小86 kb,壓縮率從傳統(tǒng)Huffman算法的45.71%提升至改進(jìn)Huffman算法的55.08%;傳統(tǒng)Huffman算法中數(shù)據(jù)傳輸出錯(cuò)率和數(shù)據(jù)傳輸丟包率為2.47%和4.18%,而在同樣傳輸要求下的篩選壓縮傳輸中數(shù)據(jù)傳輸出錯(cuò)率和數(shù)據(jù)傳輸丟包率降至2.06%和0.78%。該方法能滿足農(nóng)業(yè)機(jī)械作業(yè)狀態(tài)數(shù)據(jù)壓縮傳輸要求,在單個(gè)數(shù)據(jù)包數(shù)據(jù)較少、傳輸時(shí)間短的壓縮傳輸方式下能夠獲得較低的傳輸出錯(cuò)率和丟包率,且該方法具有計(jì)算量少、壓縮效率較高特點(diǎn),適合在農(nóng)業(yè)機(jī)械作業(yè)區(qū)域進(jìn)行數(shù)據(jù)傳輸。
[Abstract]:In order to solve the problem of transmitting agricultural machinery working state data in poor communication environment, this paper presents a data compression method based on improved Huffman coding technology to realize data compression, transmission, analysis and decompression. The results of data compression and decompression test show that the data acquisition period is 5 s and the data length is 918.38 kb. The length of data compressed based on the improved Huffman algorithm is 412.56 kb, which is 86 kb smaller than that of the traditional Huffman algorithm, and the compression ratio is increased from 45.71% of the traditional Huffman algorithm to 55.08% of the improved Huffman algorithm, and the data in the traditional Huffman algorithm is higher than that of the traditional Huffman algorithm. The transmission error rate and data transmission packet loss rate are 2.47% and 4.18%, while the data transmission error rate and data transmission packet loss rate are reduced to 2.06% and 0.78% under the same transmission requirements. The method can meet the requirement of compression and transmission of agricultural machinery state data, and it can obtain low transmission error rate and packet loss rate under the compression transmission mode with less data package and short transmission time, and the method has less calculation. High compression efficiency is suitable for data transmission in agricultural machinery operation area.
【作者單位】： 華南農(nóng)業(yè)大學(xué)工程學(xué)院;廣州地理研究所;廣州出入境檢驗(yàn)檢疫局;華南農(nóng)業(yè)大學(xué)信息學(xué)院;
【基金】：國(guó)家質(zhì)檢總局科技計(jì)劃項(xiàng)目(編號(hào):2014IK183) 廣東省科技廳計(jì)劃省部產(chǎn)學(xué)研結(jié)合項(xiàng)目(編號(hào):2012B091100345)
【分類號(hào)】：TN911.2

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