Authors

Abstract

Aiming at the problems of the low efficiency of manual pesticide application in the greenhouse, the narrow operating space of plant protection machinery, and the possibility of poisoning the pesticide applicators due to the closed space, a high-pressure atomization spraying equipment for the greenhouse was designed. The spraying equipment adopts two-way communication between PLC and HMI to realize the adjustment of atomization pressure and atomization flow, and the control equipment completes automatic spraying. To determine the best working parameters of the spraying equipment, orthogonal tests were conducted with atomization pressure and atomization nozzle aperture as the test factors and the coefficient of variation of the fog volume distribution as the evaluation index. The optimum combination after parameter optimization was determined to be as follows: atomization pressure of 4 MPa, atomization nozzle aperture of 0.4 mm. The test results under the optimal parameters showed that the spray distribution coefficient of variation was 10.5%, and the uniformity of fog volume distribution was good to meet the requirements of spraying in greenhouses.

Abstract in Chinese

针对温室手动施药效率低、植保机械作业空间狭窄、空间封闭容易造成施药人员中毒等问题，设计了一种温室高压雾化喷药设备。该喷药设备采用PLC和HMI之间的双向通信实现对雾化压力和雾化流量的调整，控制设备完成自动喷药。为确定喷药设备的最佳工作参数，以雾化压力和雾化喷头孔径为试验因素，以雾量分布变异系数为评价指标，进行了正交试验。获取最优参数组合为雾化压力为4MPa、雾化喷头孔径为0.4mm。最优参数下的试验结果表明，雾量分布变异系数为10.5%，雾量分布均匀性较好，满足在温室大棚内的喷药要求。