| 徐兴1，徐胜2，刘永鑫1，陈佳森1，蔡仲勋1，余展韶1.小型无人机机载农药变量喷洒系统设计[J].广东农业科学,2014,41(9):207- |
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小型无人机机载农药变量喷洒系统设计 |
| Variable pesticide spraying system design based on small UAV |
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| DOI： |
| 中文关键词: 无人机 喷洒系统 变量喷洒 脉宽调制 |
| 英文关键词: unmanned aerial vehicle sprinkler system variable spray pulse width modulation |
| 基金项目:国家自然科学基金（69972051）；教育部博士点新
教师基金（20124404120002）；广东省农业机械化科研课题项目
（粤农函[2013]2 号） |
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| 摘要点击次数: 2220 |
| 全文下载次数: 799 |
| 中文摘要: |
| 基于脉宽调制（Pulse Width Modulation，PWM）技术设计小型无人机机载农药变量喷洒系统，主要由药
箱、喷头、液泵及喷洒控制器组成，通过调整PWM 喷洒控制信号的占空比，改变液泵的工作时长，从而实现变量喷
洒。基于常量喷洒流量指标和机载喷洒系统的覆盖范围，确定PWM 频率为1 Hz，并建立了该频率下占空比与喷洒流
量之间的3 次多项式关系模型，模型决定系数达到0.9944。以关系模型为指导，分别测试了0.3、0.4、0.5 L/min 流量控
制指标下的变量喷洒试验效果，喷洒值和目标值之间误差分别为8.66%、4.50%和1.60%，达到变量喷洒控制的目的。 |
| 英文摘要: |
| Based on PWM (Pulse Width Modulation) technology, the variable pesticide spraying system of UAV
(Unmanned Aerial Vehicle) was promoted, which consisted of kits, nozzles, pump and spray controller. The pump operating
time was varied by the duty cycle of the PWM signal, so as to change the spray flow. According to the constant flow
indicators of spraying pesticides and the coverage sprinkler system, the PWM frequency was determined to 1 Hz. A cubic
polynomial relationship model between duty cycle and spray flow was established, and the coefficient of determination
reached 0.9944. Experiments under flow rate indicator condition of 0.3, 0.4 and 0.5 L/min were done, and the results
showed that the errors between sprayed and target flow were 8.66%, 4.50% and 1.60%. Variable spray control objective
was achieved. |
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