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極飛：農業(yè)無人機究竟需要什么樣的雷達？

2022-01-14 08:51:38 來源：極飛科技 閱讀量：17149 評論

導讀：農業(yè)無人機在作業(yè)過程中會面臨復雜的環(huán)境或挑戰(zhàn)，譬如農田中常常含有樹木、電線桿、房子、突然出現的動物與人等障礙物；同時，因為農業(yè)無人機作業(yè)飛行高度普遍在離地 2-3 米，無人機雷達容易誤將地面也識別為障礙物。

　　【農機網 明星企業(yè)】 農業(yè)無人機在作業(yè)過程中會面臨復雜的環(huán)境或挑戰(zhàn)，譬如農田中常常含有樹木、電線桿、房子、突然出現的動物與人等障礙物；同時，因為農業(yè)無人機作業(yè)飛行高度普遍在離地 2-3 米，無人機雷達容易誤將地面也識別為障礙物。
 
　　這就對農業(yè)無人機雷達提出了很高的要求，需要擁有很強的分辨率和靈敏度來探測農田中的障礙物。全新極飛P100/V50 2022 款農業(yè)無人機搭載 4D 成像雷達系統(tǒng)，為無人機提供保姆級的飛行安全防護，為用戶帶來更加安全、穩(wěn)定的作業(yè)體驗。
 

　　得益于全新的雷達系統(tǒng)——4D 成像雷達與仿地雷達，極飛 P100/V50 2022 款農業(yè)無人機具備全面環(huán)境感知和仿地飛行能力，可精準感知 40 米范圍內障礙物的位置、距離、運動方向和速度，自動預判、流暢繞行農田障礙物，實現在山地、丘陵、平原、果林等不同場景的全自主作業(yè)。
 
　　通常影響障礙物識別，有兩個因素：反射截面積和反射率。反射截面積可以理解為，表面積越大的障礙物越容易被發(fā)現 ；而反射率主要取決于障礙物材質，金屬的反射率最高，而塑料泡沫的反射率較低，雷達并不容易有效識別此類障礙物。
 

       一款在農田中好用的雷達，它需要有較強的分辨率，能在復雜的地形環(huán)境中準確地發(fā)現障礙物，這個由雷達天線決定；另外，它需要有較高的探測靈敏度，即時很小的物體也要能發(fā)現。
 
　　極飛 P100/V50 2022 款農業(yè)無人機所搭載的 4D 成像雷達是一款車規(guī)級毫米波雷達，它擁有在水平和垂直方向都能收發(fā)毫米波的雷達天線矩陣，及一個可以實時搖擺的云臺。傳統(tǒng)的毫米波雷達只具備水平方向上的障礙物感知能力，即使增加了 360 度旋轉的方式，也可能會造成垂直方向感知不清晰。
 

　　全新的 4D 成像雷達特別在垂直方向增加了天線，具備了在環(huán)境中感知垂直方向障礙物的能力。而搖擺云臺的加入，也增加了雷達的識別范圍，在工作過程中上下擺動，覆蓋了無人機飛行方向從向下 45 度到向上 90 度的范圍，結合下視仿地雷達，給無人機提供前行過程的保護，為用戶提供更安全的飛行體驗。

　　誠然，基于現有的雷達技術或其他環(huán)境等因素，目前農業(yè)無人機雷達都難以做到對障礙物 100% 的避讓，雷達的避障功能更多的時候是作為一種被動的安全預防輔助機制，我們更愿意提倡用戶在規(guī)劃航線前就將農田中的各類障礙物規(guī)劃出來，如電線、拉線等，主動做好安全規(guī)避，為無人機安全飛行提供更全面的保障。

上一篇： 紐荷蘭：共探無人農場發(fā)展，2021中國農業(yè)機械年度盛典再獲殊榮

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