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Effect of Downwash Airflow Distribution of Multi-Rotor Unmanned Aerial Vehicle on Spray Droplet Deposition Characteristics in Rice Crop


Affiliations
1 Department of Farm Machinery and Power Engineering, Agricultural Engineering College and Research Institute, Tamil Nadu Agricultural University, Coimbatore 641 003, India
2 Directorate of Crop Management, Tamil Nadu Agricultural University, Coimbatore 641 003, India
3 Department of Physical Science and Information Technology, Agricultural Engineering College and Research Institute, Tamil Nadu Agricultural University, Coimbatore 641 003, India
 

The UAV downwash airflow pattern generated by rotor propellers is one of the significant factors influencing the characteristics of spray droplet deposition distribution. UAV sprayer and battery operated sprayer were used to study the effect of downwash airflow distribution of UAV on spray droplet deposition characteristics in a paddy field. The UAV sprayer was operated with optimized operational parameters and spray droplet characteristics, viz. spray deposition rate (µl cm–2), spray droplet size (µm), spray deposition density (No’s cm–2) and spray deposition uniformity (%) were analysed using Deposit Scan software. The UAV sprayer showed better results in spray droplet deposition rate, spray coverage per unit area and spray droplet deposition densities than the conventional battery-operated manual sprayer. Additionally, it was found that the UAV sprayer increased the chemical’s penetration into crop leaves, leading to higher chemical deposition on both the upper and lower layers of rice leaves.

Keywords

Chemical Spray Deposition, Deposition Uniformity, Downwash Air, Droplet Size, Manual Spray, Water Sensitive Paper.
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  • Chen, P., Lan, Y., Douzals, J. P., Ouyang, F., Wang, J. and Xu, W., Droplet distribution of unmanned aerial vehicle under several spray volumes and canopy heights in the cotton canopy. Int. J. Precision Agric. Aviat., 2020, 1(1), 74–79.

  • Li, J., Lan, Y. and Shi, Y., Research progress on airflow characteristics and field pesticide application system of rotary-wing UAV. Trans. Chin. Soc. Agric. Eng., 2018, 34(12), 104–118; doi:10. 11975/j.issn.1002-6819.2018.12.013; http://www.tcsae.org.

  • Lan, Y. et al., Influence of the downwash wind field of plant protection UAV on droplet deposition distribution characteristics at different flight heights. Agronomy, 2021, 11(12), 2399.

  • Wang, C. et al., Testing method and distribution characteristics of spatial pesticide spraying deposition quality balance for unmanned aerial vehicle. Int. J. Agri. Biol. Eng., 2018, 11(2), 18–26.

  • Zhang, P., Zhang, W., Sun, H., Fu, H. and Liu, J., Effect of the downwash flow field of a single-rotor UAV on droplet velocity in sugarcane plant protection. Eng. Agríc., 2021, 41, 235–244.

  • Qing, T., Ruirui, Z., Liping, C., Min, X., Tongchuan, Y. and Bin, Z., Droplets movement and deposition of an eight-rotor agricultural UAV in downwash flow field. Int. J. Agric. Biol. Eng., 2017, 10(3), 47–56; doi:10.3965/j.ijabe.20171003.3075.

  • Yang, F., Xue, X., Cai, C., Sun, Z. and Zhou, Q., Numerical simulation and analysis on spray drift movement of multirotor plant protection unmanned aerial vehicle. Energies, 2018, 11(9), 2399; doi:10.3390/en11092399.

  • An, J. et al., Validation of the Institute of atmospheric physics emergency response model with the meteorological towers measurements and SF6 diffusion and pool fire experiments. Atmosp. Environ., 2013, 81, 60–67; doi:10.1016/j.atmosenv.2013.08.041.

  • Gao, Y. Y., Study on distribution of pesticide droplets in gramineous crop canopy and control effect sprayed by unmanned aerial vehicle. Northeast Agric. Univ. Harbin, China, 2013.

  • Chen, S., Lan, Y., Zhou, Z., Liao, J. and Zhu, Q., Effects of spraying parameters of small plant protection UAV on droplets deposition distribution in citrus canopy. J. South China Agric. Univ., 2017, 38(5), 97–102.

  • Dixon, D., Boon, S. and Silins, U., Watershed‐scale controls on snow accumulation in a small montane watershed, southwestern Alberta, Canada. Hydrol. Process., 2014, 28(3), 1294–1306.

  • Zhilun, Y., Luzhen, G. E., Lijun, Q. I., Yifan, C. and Yalei, W. U., Influence of UAV rotor down-wash airflow on spray width. Trans. Chin. Soc. Agric. Mach., 2018, 49(1), 116–122.

  • Berner. B. and Chojnacki, J., Use of drones in crop protection. 2017; doi:10.24326/fmpmsa.2017.9.

  • Choi, D. S., Ma, K. C., Kim, H. J., Lee, J. H., Oh, S. A. and Kim, S. G., Control standards of three major insect pests of Chinese cabbage (Brassica campestris) using drones for pesticide application. Kor. J. Appl. Entomol., 2018, 57(4), 347–354; doi:10.5656/KSAE.2018.09.0.031.

  • Shengde, C., Yubin, L., Bradley, K. F., Jiyu, L., Aimin, L. and Yuedong, M. A. O., Effect of wind field below rotor on distribution of aerial spraying droplet deposition by using multi-rotor UAV. Trans. Chin. Soc. Agric. Mach., 2017, 48(8), 105–113.

  • Wang, C. et al., Distribution characteristics of pesticide application droplets deposition of unmanned aerial vehicle based on testing method of deposition quality balance. Trans. Chin. Soc. Agric. Eng., 2016, 32(24), 89–97; doi:10.11975/j.issn.1002-6819.2016.24.012.

  • Ramasamy, M.., Lee, T. E. and Leishman, J. G., Flow field of a rotating-wing micro air vehicle. J. Aircraft, 2007, 44(4), 1236–1244.

  • Modather, M., Azmi, Y., Nor Maria, A., Ahmad Suhaizi, M. S. and Suha, E., Evaluation of pesticide spraying quality in wetland rice cultivation in Malaysia. National Convention of Agricultural and Food Engineering, Ministry of Agriculture, Malaysia, Wisma Tani, Malaysia, Putrajaya, 21 March 2019, pp. 233–237.

  • Fengbo, Y., Xinyu, X., Ling, Z. and Zhu, S., Numerical simulation and experimental verification on downwash air flow of six-rotor agricultural unmanned aerial vehicle in hover. Int. J. Agric. Biol. Eng., 2017, 10(4), 41–53.

  • Hill, B. D. and Inaba, D. J., Use of water-sensitive paper to monitor the deposition of aerially applied insecticides. J. Econ. Entomol., 1989, 82(3), 974–980.

  • Guo, S., Li, J., Yao, W., Zhan, Y., Li, Y. and Shi, Y., Distribution characteristics on droplet deposition of wind field vortex formed by multi-rotor UAV. PLoS ONE, 2019, 14(7), e0220024.

  • Martin, D., Singh, V., Latheef, M. A. and Bagavathiannan, M., Spray deposition on weeds (Palmer amaranth and Morningglory) from a remotely piloted aerial application system and backpack sprayer. Drones, 2020, 4(3), 59.

  • Xinyu, X., Kang, T., Weicai, Q., Yubin, L. and Huihui, Z., Drift and deposition of ultra-low altitude and low volume application in paddy field. Int. J. Agric. Biol. Eng., 2014, 7(4), 23–28.

  • Zhu, H., Salyani, M. and Fox, R. D., A portable scanning system for evaluation of spray deposit distribution. Comput. Electron. Agric., 2011, 76(1), 38–43.

  • American Society of Agricultural Engineering, Spray nozzle classification by droplet spectra, S386; ASABE Standards. Spray Nozzle Classification by Droplet Spectra – Forages. ASABE: St Joseph, MI, USA, 2004.

  • Zhang, X. Q. et al., Effects of spray parameters of drone on the droplet deposition in sugarcane canopy. Sugar Tech., 2020, 22(4), 583–588.

  • Zhang, J., He, X. K., Song, J. and Zeng, A. J., Influence of spraying parameters of unmanned aircraft on droplets deposition. Trans. Chin. Soc. Agric. Mach., 2012, 43(12), 94–96.

  • Xue, X., Tu, K. and Lan, Y., Effects of pesticides aerial applications on rice quality. Trans. Chinese Soc. Agric. Mach., 2013, 44(12), 94–98.

  • Chen, S. et al., Effect of droplet size parameters on droplet deposition and drift of aerial spraying by using plant protection UAV. Agronomy, 2020, 10(2), 195.


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  • Effect of Downwash Airflow Distribution of Multi-Rotor Unmanned Aerial Vehicle on Spray Droplet Deposition Characteristics in Rice Crop

Abstract Views: 155  |  PDF Views: 83

Authors

D. Yallappa
Department of Farm Machinery and Power Engineering, Agricultural Engineering College and Research Institute, Tamil Nadu Agricultural University, Coimbatore 641 003, India
R. Kavitha
Department of Farm Machinery and Power Engineering, Agricultural Engineering College and Research Institute, Tamil Nadu Agricultural University, Coimbatore 641 003, India
A. Surendrakumar
Department of Farm Machinery and Power Engineering, Agricultural Engineering College and Research Institute, Tamil Nadu Agricultural University, Coimbatore 641 003, India
B. Suthakar
Department of Farm Machinery and Power Engineering, Agricultural Engineering College and Research Institute, Tamil Nadu Agricultural University, Coimbatore 641 003, India
A. P. Mohan Kumar
Department of Farm Machinery and Power Engineering, Agricultural Engineering College and Research Institute, Tamil Nadu Agricultural University, Coimbatore 641 003, India
M. K. Kalarani
Directorate of Crop Management, Tamil Nadu Agricultural University, Coimbatore 641 003, India
Balaji Kannan
Department of Physical Science and Information Technology, Agricultural Engineering College and Research Institute, Tamil Nadu Agricultural University, Coimbatore 641 003, India

Abstract


The UAV downwash airflow pattern generated by rotor propellers is one of the significant factors influencing the characteristics of spray droplet deposition distribution. UAV sprayer and battery operated sprayer were used to study the effect of downwash airflow distribution of UAV on spray droplet deposition characteristics in a paddy field. The UAV sprayer was operated with optimized operational parameters and spray droplet characteristics, viz. spray deposition rate (µl cm–2), spray droplet size (µm), spray deposition density (No’s cm–2) and spray deposition uniformity (%) were analysed using Deposit Scan software. The UAV sprayer showed better results in spray droplet deposition rate, spray coverage per unit area and spray droplet deposition densities than the conventional battery-operated manual sprayer. Additionally, it was found that the UAV sprayer increased the chemical’s penetration into crop leaves, leading to higher chemical deposition on both the upper and lower layers of rice leaves.

Keywords


Chemical Spray Deposition, Deposition Uniformity, Downwash Air, Droplet Size, Manual Spray, Water Sensitive Paper.

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DOI: https://doi.org/10.18520/cs%2Fv125%2Fi2%2F172-182