| 喷杆运动与喷雾沉积分布变异系数关系试验研究 |
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| 引用本文： | 崔龙飞,薛新宇,乐飞翔,秦维彩,周晴晴.喷杆运动与喷雾沉积分布变异系数关系试验研究[J].农机化研究,2019(6):169-174. |
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| 作者姓名： | 崔龙飞 薛新宇 乐飞翔 秦维彩 周晴晴 |
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| 作者单位： | 农业部南京农业机械化研究所 |
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| 基金项目： | 国家重点研发计划项目(2016YFD0200705);国家自然科学基金项目(51605236);江苏省农业科技自主创新资金(CX(16)1043) |
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| 摘 要： | 喷杆式喷雾机被广泛用于作物病虫草害的防治和液态化肥的喷施,可以增大农作物的产量;然而,喷雾机在起伏不平的田间行驶时,地面起伏会导致喷杆发生无规律运动。为了探明喷杆运动对喷雾沉积分布的影响规律,通过在喷杆末梢安装超声波测距传感器和加速度传感器,测量喷杆的滚转运动及垂向振动加速度,同时在田间布置水敏纸,测量沿着喷杆方向和行驶方向的雾滴分布均匀性变异系数。使用双GPS辅助的惯性测量系统获取喷雾机底盘的运动姿态和运动轨迹,将测得的喷杆运动与水敏纸测得的沉积分布量对应起来,通过对试验数据分析车体晃动、喷杆运动、喷雾分布变异系数之间的关系。结果表明:对无减振悬架的喷杆喷雾机底盘晃动越剧烈,喷杆的不规律运动及弹性变形越大;A组覆盖率试验采样位置处喷杆两侧高度差374mm,对应的横向喷雾分布变异系数为80.38%;B组位置处喷杆高度差118mm,对应的横向喷雾分布变异系数为65.48%;喷臂两侧高度差越大,雾滴分布的变异系数越大。同时,喷雾机垂向振动加速度比前进方向的加速度大,喷杆垂直面内的振动较大,导致测得的沿喷杆方向的雾滴覆盖率变异系数大于行驶方向的变异系数。
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| 关 键 词： | 喷杆运动 沉积分布 喷雾变异 |
Experimental Study on Relationship Between Spray Boom Movement and Spray Deposition Distribution Variation Coefficient |
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| Cui Longfei,Xue Xinyu,Le Feixiang,Qin Weicai,Zhou Qingqing.Experimental Study on Relationship Between Spray Boom Movement and Spray Deposition Distribution Variation Coefficient[J].Journal of Agricultural Mechanization Research,2019(6):169-174. |
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| Authors: | Cui Longfei Xue Xinyu Le Feixiang Qin Weicai Zhou Qingqing |
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| Institution: | (Nanjing Research Institute for Agricultural Mechanization, Ministry of Agriculture, Nanjing 210014, China) |
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| Abstract: | To increase the yield in agriculture, plants must be protected against diseases and need to be provided with fertilizers. One of the most important methods to spread agro-chemicals is by using spray booms. The efficiency of the chemicals is highly correlated with the uniformity of the spray distribution pattern. Spray booms are weakly damped structures and their main movements, rolling, yawing and jolting, dramatically affect the spray distribution pattern. In order to find out the influence law of spray boom movement on spray deposition distribution,ultrasonic sensors and acceleration sensors are installed at the end of the spray boom, rolling motion and vertical vibration acceleration of the boom are measured.At the same time, the water sensitive papers ware arranged in the field to measure the uniformity coefficient of droplet distribution along the direction of the spray rod and the direction of travel.The dual GPS aided inertial measurement system is used to measure the motion attitude and trajectory of the sprayer, thenthe measured spray boom motion is corresponding to the deposition distribution,the relationship between sprayer motion, boom motion and spray distribution is analyzed though the experimental data,results show that the more serious the chassis wobble is, the more irregular motion and elastic deformation of the spray boom. at A group coverage test sampling location, The height difference between the two sides of the spray rod is 374 mm, The variation coefficient of the spray distribution along the boom axis is 80.38%,at B group coverage test sampling location, The height difference between the two sides of the spray rod is 118 mm, The variation coefficient of the spray distribution along the boom axis is 65.48%,the greater the difference in height between the two sides of the boom, the greater the coefficient of variation of droplet distribution.At the same time, the vertical vibration acceleration of the sprayer is larger than the acceleration in the forward direction, and the vibration in the vertical plane of the spray boom is larger,cause the coefficient of variation of the droplet coverage rate measured along the boom direction is greater than the coefficient of variation in the direction of travel. |
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| Keywords: | spray boom movement spray deposit spray variation |
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