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Effect of Operating Parameters on Performance of Target Actuated Sprayer

机译：操作参数对目标驱动喷雾器性能的影响

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Chemical pesticides have played and will continue to play a major role in the rapid advancement of agricultural production. In crop spraying, off target application resulting in air and soil pollution has to be reduced. Hence an attempt has been made to develop a target actuated sprayer to reduce the off target application of chemical and thereby soil and environmental pollution. The different parameters taken for this study are concentration of the spray, width of plant canopy, height of the sensor from the canopy and forward speed of operations. Optimization test were also conducted by using different connectors namely 'T' joint, 'Y' joint, non-return valves and with four models of eductors. From the observations, it is concluded that eductor model Ⅳ was found to be the best connector with mixing chamber for the chemical and carrier liquid. The range of pressures adopted for chemical and carrier liquid produced droplets with VMD and NMD ranging between 101 to 200 u and VMD/NMD ratio of 1.09 to 1.29 which is classified as fine spray. The amount of chemical delivered decreased with the increase in forward speed and height of sensor and with decrease in chemical concentration while it increased with increase in simulation plate width. The Analysis of Variance for optimum amount of chemical delivered as influenced by concentration of chemical, width of simulation plate, height of sensor above the plant canopy and forward speed of operation indicated that the selected variables and their interactions significantly affected the amount of chemical delivered. The mean comparison tests indicated that the minimum amount of chemical delivered (499 μl) was achieved at a chemical concentration of 25 percent, 100 mm width of simulation plate, 3.5 km h~(-1) forward speed and sensor height of 300 mm above the plant canopy. A prediction model on the amount of chemical delivered was developed based on multiple linear regression analysis (q = - 707.1769461 + 70.08855205C + 16.13430133W - 809.1538611S). The analysis of variance of lag time indicated that the selected variables and their interactions significantly affected the amount of chemical delivered at one percent level. The minimum lag time of 1 ms was observed for the combination of 100 mm width of simulation plate forward speed of 3.5 km h~(-1) and sensor height of 300 mm above the plant canopy.
机译：化学农药在农业生产的快速发展中已经并将继续发挥重要作用。在农作物喷洒中，必须减少造成空气和土壤污染的脱靶施用。因此，已经尝试开发一种目标致动的喷雾器，以减少化学药品的偏离目标的施用，从而减少土壤和环境污染。这项研究采用的不同参数是喷雾的浓度，植物冠层的宽度，来自冠层的传感器高度和前进速度。还通过使用不同的连接器（即“ T”形接头，“ Y”形接头，止回阀）和四种喷射器型号进行了优化测试。从观察结果可以得出结论，喷射器Ⅳ型是化学和载液混合室的最佳连接器。 VMD和NMD介于101至200 u之间且VMD / NMD比为1.09至1.29的化学和载液产生的液滴所采用的压力范围属于精细喷雾。化学品的输送量随着传感器前进速度和高度的增加以及化学品浓度的降低而减少，而随着模拟板宽度的增加而增加。受化学品浓度，模拟板宽度，工厂顶棚上方传感器高度和前进操作速度的影响，对最佳化学品输送量的方差分析表明，所选变量及其相互作用显着影响了化学品输送量。平均比较测试表明，在25％的化学浓度，100 mm的模拟板宽度，3.5 km h〜（-1）的前进速度和300 mm以上的传感器高度下，化学药品的输送量最少（499μl）植物冠层。基于多重线性回归分析，建立了化学物质输送量的预测模型（q =-707.1769461 + 70.08855205C + 16.13430133W-809.1538611S）。滞后时间方差的分析表明，所选变量及其相互作用显着影响百分之一的化学物质输送量。对于100 mm宽的模拟板前进速度3.5 km h〜（-1）和传感器高度在植物冠层上方300 mm的组合，观察到最小延迟时间为1 ms。

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