农业工程学报(htp!/www.tcsae.org) 016年 Qiu Baijing, Wang Liwei, Cai Donglin, et al. Effects of flight [18 Huang Y, Zhan W, Fritz B K, et al. Optimizing selection of altitude and speed of unmanned helicopter on spray ontrollable variables to minimize downwind drift from deposition uniform[J]. Transactions of the Chinese Society of aerially applied sprays[J]. Applied Engineering in Agriculture Agricultural Engineering(Transactions of the CSAE), 2013 2012,28(3):307-314 29(24): 25-32. (in Chinese with English abstract) [】]张京,何雄奎,宋坚 无人驾驶直升机航空喷雾参 [6】秦维彩,薛新宇,周立新,等.无人直升机喷雾参数对玉 数对雾滴沉积的影响[农业机械学报,2012,43(12) 米冠层雾滴沉积分布的影响[农业工程学报,2014 94-96. 305):50-56 Zhang Jing, He Xiongkui, Song Jianli, et al. Influence of Qin Weicai, Xue Xinyu, Zhou Lixin, et al. Effects of spraying spraying parameters of unmanned aircraft on droplets parameters of unmanned aerial vehicle on droplets deposition deposition]. Transactions of the Chinese Society of distribution of maize canopies U]. Transactions of the Chines Agricultural Machinery. 2012, 43(12): 94-96.(in Chinese Society of Agricultural Engineering (Transactions of the with English abstract) CSAE), 2014, 30(5): 50-56.(in Chinese with English [20] Huang Y B, Thomson S J. Characterization of In-Swath abstract) spray deposition for CP-llTT Flat-Fan nozzles used 7 Fritz B K, Hoffmann WC, Bagley We, et al. Influence of air low-volume aerial application of crop production and shear and adjuvants on spray atomization]. ASTM protection materials]. Transactions of the ASABE, 2011 nternational. 2014. 33: 151-173 4(6):1973-1979 Effect of spray parameters of small unmanned helicopter on distribution regularity of droplet deposition in hybrid rice canopy Chen Shengde, Lan Yubin, Li Jiyu Zhou Zhiyan, Jin Ji, Liu Aimin (1. College of Engineering, South China agricultural University, Guang=hou 510642, China 2. Engineering Research Center for Agricultural Aviation Application(ERCAAA), Guangdong, Guang=hou 510642, China, 3. Hunan Longping Seed Industry Co LTD, Changsha 410006, China) Abstract: In order to find out the distribution regularity of droplet deposition of small unmanned helicopter in rice canopy spray test with different flight parameters was carried out to study the effect of different operation parameters on the distribution of droplet deposition. The distribution regularity of droplet deposition was obtained by drawing the operation trajectory with BeiDou Navigation Satellite System carried by one-rotor small unmanned helicopter HY-B-10L. The spraying and deposition of the growth regulator(Ponceau 2R solution with the mass fraction of 5%o) were simulated, and the parameters results of droplet deposition in the target areas and non-target areas were analyzed by Image processing software Deposit-Scan The analysis results showed that: The trends of droplet deposition were similar in the 3 trials, the parameters of flight height and flight speed both had a great influence on the mean droplet deposition amount in the collection point of target areas but had not significant influence on the uniformity of droplet deposition In the target area, the droplet deposition decreased with the increase of the flight height in the 3 trials. The total droplet deposition was respectively 2.380, 1.905 and 1.156 uL/cm,and the average droplet deposition of collection point was respectively 0 198, 0.159 and 0.064 uL/cm". The uniformity of droplets deposition was the best in the flight height of 1.92 m, the best value of uniformity could reach 29%, and the amount of droplets drift was 0. 174 uL/cm4, which was the least in the drift area in this case, while the amount of droplets drift in the flight height of 3. 15 m was 0.270 uL/cm*, which was the largest value. The larger value of droplet drift was 0.205 AL/cm" in the flight height of 1.33 m, and it had the worst uniformity in the 3 trials. In addition, the amounts of the droplet deposition in the first and second collection zone were clearly more than the amount of the third collection zone which had a faster flight speed in the target area. In the 3 trials, the average amount of droplet deposition in the first and second collection zone was higher than the amount in the third collection zone by 184.27%0,53.51% and 72.31% respectively. Due to the effect of environmental wind field, the amount of droplets deposition and the drift distance of droplets on the left side of flight route were more than that on the right side of flight route, and with the effect of flight speed, the amount of droplet deposition in the third collection zone on the left side of flight route was more than the droplet deposition in the first and second collection zone on the right side in the drift area. The results have fully revealed the effect of operation parameters on the distribution regularity of droplet deposition and drift, and surmised the impact on the droplet deposition from the perspective of wind field factor. It also has an important guiding significance for the reasonable spraying and increasing the spraying efficiency Keywords: spraying; mechanization; crops; small unmanned helicopter; droplet; deposition46 农业工程学报（http://www.tcsae.org） 2016 年 Qiu Baijing, Wang Liwei, Cai Donglin, et al. Effects of flight altitude and speed of unmanned helicopter on spray deposition uniform[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2013, 29(24): 25－32. (in Chinese with English abstract) [16] 秦维彩，薛新宇，周立新，等. 无人直升机喷雾参数对玉 米冠层雾滴沉积分布的影响[J]. 农业工程学报，2014， 30(5)：50－56. Qin Weicai, Xue Xinyu, Zhou Lixin, et al. Effects of spraying parameters of unmanned aerial vehicle on droplets deposition distribution of maize canopies[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2014, 30(5): 50－56. (in Chinese with English abstract) [17] Fritz B K, Hoffmann W C, Bagley W E, et al. Influence of air shear and adjuvants on spray atomization[J]. ASTM International, 2014, 33: 151－173. [18] Huang Y, Zhan W, Fritz B K, et al. Optimizing selection of controllable variables to minimize downwind drift from aerially applied sprays[J]. Applied Engineering in Agriculture, 2012, 28(3): 307－314. [19] 张京，何雄奎，宋坚利，等. 无人驾驶直升机航空喷雾参 数对雾滴沉积的影响[J]. 农业机械学报，2012，43(12)： 94－96. Zhang Jing, He Xiongkui, Song Jianli, et al. Influence of spraying parameters of unmanned aircraft on droplets deposition[J]. Transactions of the Chinese Society of Agricultural Machinery. 2012, 43(12): 94－96. (in Chinese with English abstract) [20] Huang Y B, Thomson S J. Characterization of In-Swath spray deposition for CP-11TT Flat–Fan nozzles used in low-volume aerial application of crop production and protection materials[J]. Transactions of the ASABE, 2011, 54(6): 1973－1979. Effect of spray parameters of small unmanned helicopter on distribution regularity of droplet deposition in hybrid rice canopy Chen Shengde1,2, Lan Yubin1,2※ , Li Jiyu1,2, Zhou Zhiyan1,2, Jin Ji1,2, Liu Aimin3 (1. College of Engineering, South China Agricultural University, Guangzhou 510642, China; 2. Engineering Research Center for Agricultural Aviation Application (ERCAAA), Guangdong, Guangzhou 510642, China; 3. Hunan Longping Seed Industry Co.LTD, Changsha 410006, China) Abstract: In order to find out the distribution regularity of droplet deposition of small unmanned helicopter in rice canopy, spray test with different flight parameters was carried out to study the effect of different operation parameters on the distribution of droplet deposition. The distribution regularity of droplet deposition was obtained by drawing the operation trajectory with BeiDou Navigation Satellite System carried by one-rotor small unmanned helicopter HY-B-10L. The spraying and deposition of the growth regulator (Ponceau 2R solution with the mass fraction of 5‰) were simulated, and the parameters results of droplet deposition in the target areas and non-target areas were analyzed by Image processing software Deposit-Scan. The analysis results showed that: The trends of droplet deposition were similar in the 3 trials, the parameters of flight height and flight speed both had a great influence on the mean droplet deposition amount in the collection point of target areas but had not significant influence on the uniformity of droplet deposition. In the target area, the droplet deposition decreased with the increase of the flight height in the 3 trials. The total droplet deposition was respectively 2.380, 1.905 and 1.156 μL/cm2 , and the average droplet deposition of collection point was respectively 0.198, 0.159 and 0.064 μL/cm2 . The uniformity of droplets deposition was the best in the flight height of 1.92 m, the best value of uniformity could reach 29%, and the amount of droplets drift was 0.174 μL/cm2 , which was the least in the drift area in this case, while the amount of droplets drift in the flight height of 3.15 m was 0.270 μL/cm2 , which was the largest value. The larger value of droplet drift was 0.205 μL/cm2 in the flight height of 1.33 m, and it had the worst uniformity in the 3 trials. In addition, the amounts of the droplet deposition in the first and second collection zone were clearly more than the amount of the third collection zone which had a faster flight speed in the target area. In the 3 trials, the average amount of droplet deposition in the first and second collection zone was higher than the amount in the third collection zone by 184.27%, 53.51% and 72.31% respectively. Due to the effect of environmental wind field, the amount of droplets deposition and the drift distance of droplets on the left side of flight route were more than that on the right side of flight route, and with the effect of flight speed, the amount of droplet deposition in the third collection zone on the left side of flight route was more than the droplet deposition in the first and second collection zone on the right side in the drift area. The results have fully revealed the effect of operation parameters on the distribution regularity of droplet deposition and drift, and surmised the impact on the droplet deposition from the perspective of wind field factor. It also has an important guiding significance for the reasonable spraying and increasing the spraying efficiency. Keywords: spraying; mechanization; crops; small unmanned helicopter; droplet; deposition