作　　者： ; ; ; ; ;

机构地区： 江苏大学农业工程研究院现代农业装备与技术省部共建教育部重点实验室

出　　处： 《农业机械学报》 2007年第12期70-73,共4页

摘　　要： 通过实验和理论分析建立了雾量分布模型,研究了雾量分布规律。研究表明：喷杆方向沉积变异系数在两喷头之间出现最低,而在两喷头正下方出现极高值;行驶方向的沉积变异系数沿着一定规律周期性变化,其周期与占空比相关;在相同压力的情况下,同一喷头的行驶方向及喷杆方向沉积变异系数的峰值均随着车速的提高而上升,随占空比的上升而下降;在研究范围内（40-60cm）,变异系数的峰值随喷头高度的升高而降低;若车速和占空比均相同,110°扇形喷头的雾量分布较80°扇形喷头在时空方向上都更加均匀。 The spray deposit distribution model was established by way of theoretical analysis and experimental research, and the law of spray deposit distribution was studied. The result showed that the CV （coefficient of variation） value of boom direction at the middle point on the boom between two adjacent nozzles was reduced dramatically. The CV reached its maximum value close to the center of the pattern, directly under the nozzle. The CV value of advancing direction has a periodic change with the cyclic of the duty cycle. Under the same pressure, both boom and advancing direction CV would rise with the acceleration of the tractor and would fall with the increasing of both duty cycle and nozzles height in the researched range （40-60 cm）, The flat fan nozzle of 110° would give more uniform deposit distribution than that of 80° at the same advancing speed and duty cycle.

关 键 词： 变量喷雾 脉宽调制 喷雾沉积

领　　域： [农业科学] [农业科学]