Development of drift reduction technology for field boom sprayers

田间喷杆喷雾机减少漂移技术的开发

• 批准号: 08660308
• 负责人: SATOW Tadatoshi
• 金额: $ 1.54万
• 依托单位: Obihiro University of Agriculture and Veterinary Medicine
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08660308/
• 关键词: Spray distribution pattern; Spray drift; Wind tunnel experiment; Spray particle size; Application height; Wind velocity; Conventional and driftless nozzles; Automatic control device; 農薬散布; アンケート調査; 防除日誌; ドリフト特性; 感水紙; 被覆面積率; ブームスプレーヤ; ブーム高さ自

This research was conducted to investigate spray operations, to analyze the spray drift mechanism by wind tunnel experiments, and to develop the spray drift reduction technology for field boom sprayers.1. From May to August every year, farmers in Tokachi are busy doing pest control operations. They usually do the operation in the early morning and evening when the wind velocity is low. Large-scale farmers are more advanced in the use of high-efficiency sprayers, the trailer and self-propelled types , with application width of 20 m or more. The wind is one of the factors that disturb the timing of the application of chemicals to control pests and diseases. Therefore, farmers desire to use drift spray reduction technology that can still be operated even in mild to strong wind conditions.2. The logarithm of the drift distance linearly increases, as the spray particles become smaller. It also increases, as the discharge velocity of the spray particles becomes slower. For conventional nozzles, the drift increases exponentially beginning at the application height of 40 cm and wind velocity of 1 m/s. However, when driftless nozzles were used, the drift was reduced. to less than half to that of the conventional nozzles. At no wind condition, the spray distribution pattern extends to the direction of the nozzle. When there is a wind, the drift in the leeward side increases, in sprayers with long boom, the use of automatic control device is necessary to keep the application height constant.3. The use of the boom height controller and the selected driftless nozzle decreased the spray drift of the conventional sprayers by almost 70%. This technology made it possible to spray at wind velocity condition of up to 2.8 m/s. Therefore, the technology is extremely effective in reducing the drift in spraying operations.

本研究旨在探讨田间喷杆式喷雾机的喷雾作业，并借由风洞实验分析喷雾飘移的机理，进而发展减少喷雾飘移的技术.每年5月到8月，十胜的农民都在忙着忙碌的病虫害防治作业。他们通常在清晨和傍晚风速较低时进行操作。大农场主在使用高效喷雾器方面比较先进，有拖车式和自行式，喷洒宽度为20米或更大。风是干扰施用化学品控制害虫和疾病的时间的因素之一。因此，农民希望使用即使在轻微到强风条件下仍然可以操作的漂移喷雾减少技术。2.漂移距离的对数随着喷雾颗粒的变小而线性增加。随着喷雾颗粒的排放速度变慢，它也会增加。对于传统的喷嘴，漂移在40厘米的应用高度和1米/秒的风速开始呈指数增加。然而，当使用无漂移喷嘴时，漂移减小。到传统喷嘴的一半以下。在无风条件下，喷雾分布模式向喷嘴方向延伸。当有风时，在背风侧的漂移增加，在喷雾器与长臂，使用自动控制装置是必要的，以保持应用高度恒定. 3.使用吊杆高度控制器和选定的无漂移喷嘴将传统喷雾器的喷雾漂移降低了近70%。该技术使其能够在风速高达2.8 m/s的条件下喷涂。因此，该技术在减少喷涂作业中的漂移方面非常有效。