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低速智能農(nóng)業(yè)車輛多分辨率自適應(yīng)測(cè)速系統(tǒng)設(shè)計(jì)
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國(guó)家高技術(shù)研究發(fā)展計(jì)劃（863計(jì)劃）資助項(xiàng)目（2006AA10Z259）,、中央高校基本科研業(yè)務(wù)費(fèi)資助項(xiàng)目（KYZ201006）和南京農(nóng)業(yè)大學(xué)青年科技創(chuàng)新基金資助項(xiàng)目（KJ09030）


Design of Multiresolution Adaptive Speed Measurement System for Low-speed Intelligent Agricultural Vehicle
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    摘要:

    根據(jù)智能化農(nóng)業(yè)車輛低速工作的特點(diǎn),，采用CAN總線通信技術(shù)和多線程技術(shù),，設(shè)計(jì)并實(shí)現(xiàn)了基于脈沖式多普勒雷達(dá)的智能測(cè)速系統(tǒng),。通過(guò)速度分級(jí)和可變滑窗灰色預(yù)測(cè)，為系統(tǒng)建立了多分辨率自適應(yīng)機(jī)制，在保證測(cè)量精度的同時(shí)降低其對(duì)系統(tǒng)資源的消耗,。試驗(yàn)表明：?jiǎn)?dòng)分辨率自適應(yīng)機(jī)制后，車輛速度為0.2 m/s時(shí),，測(cè)量平均誤差為1.45%,，分辨率發(fā)生器工作頻率降低76.7%；車輛速度為0.8 m/s時(shí),，測(cè)量平均誤差降低到0.61%,，分辨率發(fā)生器工作頻率降低90.0%。變速運(yùn)動(dòng)過(guò)程中,，能夠獲得9.6 Hz的穩(wěn)定輸出頻率,，同時(shí)大幅降低分辨率發(fā)生器工作頻率。

    Abstract:

    A pulse Doppler radar based real-time speed measurement system was designed by using CAN bus communication technology and multithreading technology according to the low speed characteristic of intelligent agricultural vehicle. In order to obtain a high precision result with the least system resource consumption, the multiresolution adaptive policy was designed by dividing speed level and variable sliding-window gray prediction. Experiments showed that the average error was 1.45% and the working frequency of resolution generator was reduced by 76.7% after adaptive policy started when the speed of vehicle was 0.2 m/s. The average error was 0.61% and the working frequency of resolution generator was reduced by 90.0% after policy started when the speed of vehicle was 0.8 m/s. The output frequency of system was steady 9.6 Hz and the frequency of resolution generator was dramatically reduced during variable speed movement. 

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田光兆,安秋,姬長(zhǎng)英,顧寶興,王海青,趙建東.低速智能農(nóng)業(yè)車輛多分辨率自適應(yīng)測(cè)速系統(tǒng)設(shè)計(jì)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2013,44(2):159-164. Tian Guangzhao, An Qiu, Ji Changying, Gu Baoxing, Wang Haiqing, Zhao Jiandong. Design of Multiresolution Adaptive Speed Measurement System for Low-speed Intelligent Agricultural Vehicle[J]. Transactions of the Chinese Society for Agricultural Machinery,2013,44(2):159-164.

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  • 在線發(fā)布日期: 2013-02-04
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