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Evaluating effective swath width and droplet distribution of aerial spraying systems on M-18B and Thrush 510G airplanes

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International Journal of agricultural and Biological Engineering 2015年第2期8卷 21-30页

作者： Zhang Dongyan Chen Liping Zhang Ruirui Xu Gang Lan Yubin Wesley Clint Hoffmann Wang Xiu Xu Min Beijing Research Center of Intelligent Equipment for Agriculture Beijing 100097China National Research Center of Intelligent Equipment for Agriculture Beijing 100097China Key Laboratory of Agri-informatics Ministry of AgricultureBeijing 100097China Beijing Key Laboratory of Intelligent Equipment Technology for Agriculture Beijing 100097China Sino-US agricultural Aviation Cooperative Technology Center BeijingChina and College StationTXUSA United States Department of Agriculture(USDA) Agricultural Research Service(ARS)Aerial Application Technology Research UnitCollege StationTX 77840

Aerial spraying plays an important role in promoting agricultural production and protecting the biological environment due to its flexibility,high effectiveness,and large operational area per unit of *** order to evaluate the performance parameters of the spraying systems on two fixed wing airplanes M-18B and Thrush 510G,the effective swath width and uniformity of droplet deposition under headwind flight were tested while the planes operated at the altitudes of 5 m and 4 *** results showed that although wind velocities varied from 0.9 m/s to 4.6 m/s,and the directions of the atomizer switched upward and downward in eight flights,the effective swath widths were kept approximately at 27 m and 15 m for the M-18B and Thrush 510G,respectively,and the latter was more *** addition,through analyzing the coefficients of variation(CVs)of droplet distribution,it was found that the CVs of the M-18B were 39.57%,33.54%,47.95%,and 59.04% at wind velocities of 0.9,1.1,1.4 and 4.6 m/s,respectively,gradually enhancing with the increasing of wind speed;the CVs of Thrush 510G were 79.12%,46.19%,14.90%,and 48.69% at wind velocities of 1.3,2.3,3.0 and 3.4 m/s,respectively,which displayed the irregularity maybe due to change of instantaneous wind ***,in terms of the CVs and features of droplet distribution uniformity for both airplanes in the spray swath,choosing smaller CV(20%-45%)as the standard of estimation,it was found that the Thrush 510G had a better uniform droplet distribution than the *** results provide a research foundation for promoting the development of aerial spraying in China.

关键词： aerial spraying effective swath width droplet distribution coefficients of variation agricultural airplane

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Development and evaluation of low-altitude remote sensing systems for crop production management

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International Journal of agricultural and Biological Engineering 2016年第4期9卷 1-11页

作者： Yanbo Huang Steven J.Thomson Howard J.Brand Krishna N.Reddy United States Department of Agriculture Agricultural Research ServiceCrop Production Systems Research UnitStoneville 38776USA United States Department of Agriculture National Institute of Food and AgricultureDivision of Agricultural SystemsWashington DC 20024USA Virginia Tech Department of Mechanical EngineeringBlacksburg 24061USA

Precision agriculture accounts for within-field variability for targeted treatment rather than uniform treatment of an entire *** is built on agricultural mechanization and state-of-the-art technologies of geographical information systems(GIS),global positioning systems(GPS)and remote sensing,and is used to monitor soil,crop growth,weed infestation,insects,diseases,and water status in farm fields to provide data and information to guide agricultural management *** agriculture began with mapping of crop fields at different scales to support agricultural planning and decision *** the development of variable-rate technology,precision agriculture focuses more on tactical actions in controlling variable-rate seeding,fertilizer and pesticide application,and irrigation in real-time or within the crop season instead of mapping a field in one crop season to make decisions for the next crop *** the development of aerial variable-rate systems,low-altitude airborne systems can provide high-resolution data for prescription variable-rate *** systems for multispectral imaging using a number of imaging sensors(cameras)were *** aerial vehicles(UAVs)provide a unique platform for remote sensing of crop fields at slow speeds and low-altitudes,and they are efficient and more flexible than manned agricultural airplanes,which often cannot provide images at both low altitude and low speed for capture of high-quality *** are also more universal in their applicability than agricultural aircraft since the latter are used only in specific *** study presents the low-altitude remote sensing systems developed for detection of crop stress caused by multiple ***,as a special platform,were discussed for crop sensing based on the researchers'studies.

关键词： low-altitude remote sensing agricultural airplane unmanned aerial vehicle(UAV) crop production management precision agriculture

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