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溫室青椒中2.4 GHz無線電波傳播特性研究
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科技型中小企業(yè)技術創(chuàng)新基金資助項目（11C26213204549）,、江蘇省農業(yè)科技支撐計劃資助項目（BE2010347）,、江蘇省產學研聯(lián)合創(chuàng)新資金資助項目（BY2013065-07）和江蘇高校優(yōu)勢學科建設工程資助項目


Propagation Characteristics of 2.4 GHz Radio Wave in Greenhouse of Green Peppers
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    摘要:

    為解決溫室中無線傳感器網(wǎng)絡的規(guī)劃和部署問題，探討作物對無線電波傳播特性的影響,，研究了種植青椒的溫室中2.4 GHz無線信號在不同方向和高度下的傳播特性,。通過試驗實地測量了3個方向和2個高度下接收信號強度和丟包個數(shù),，并通過Matlab對試驗數(shù)據(jù)進行回歸分析。結果表明：不同方向和高度下,，青椒中無線信道傳播特性符合對數(shù)路徑衰減模型,，擬合相關系數(shù)在0.900 7和0.947 3之間；傳感器節(jié)點在青椒中的不同高度決定著青椒中2.4 GHz無線電波的傳播特性,，對無線信道傳播特性的影響較為顯著,，而傳播方向對青椒中無線信號的影響較弱。同時得到了青椒中傳感器節(jié)點最宜部署在青椒冠層及以上位置,，為無線傳感器網(wǎng)絡在種植青椒的溫室中的節(jié)點部署提供了技術支持,。

    Abstract:

    In order to configure wireless sensor networks system and node deployment in greenhouse, this paper researched propagation characteristics of 2.4 GHz wireless channel at different directions and heights in greenhouse of green peppers. Received signal strength and packet loss numbers were investigated by field testing measurements at three directions and two heights. Regression analysis results showed that the radio channel propagation characteristics in different directions and heights of green peppers accorded with logarithm distance path loss model, and the fitting correlation coefficients between computational values and measurement values were between 0.900 7 and 0.947 3. Different heights of sensor nodes in the green peppers determined the radio wave propagation characteristics. Besides, validation results showed that it was the best to deploy the sensor nodes antennas at the top of green peppers canopy or above of it in greenhouse. This research can provide technical support for WSN application in greenhouse.

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李萍萍,彭玉禮,王紀章.溫室青椒中2.4 GHz無線電波傳播特性研究[J].農業(yè)機械學報,2014,45(2):251-255. Li Pingping, Peng Yuli, Wang Jizhang. Propagation Characteristics of 2.4 GHz Radio Wave in Greenhouse of Green Peppers[J]. Transactions of the Chinese Society for Agricultural Machinery,2014,45(2):251-255.

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  • 收稿日期:2013-03-05
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  • 在線發(fā)布日期: 2014-02-10
  • 出版日期: 2014-02-10
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