GPS應用於桿式噴藥車變率施噴系統之實測

Actual Tests of the Variable-rate Spraying System for a Boom Sprayer Using GPS

曹智鈞(Chih-Chun Tsao)

指導教授 ： 葉仲基

國立臺灣大學/生物資源暨農學院/生物產業機電工程學研究所/碩士(2004年)

https://doi.org/10.6342/NTU.2004.00069

摘要

本論文針對精準農業體系下之桿式噴藥車之變率施噴系統進行研究，使其能依照事前所偵測的病蟲害程度或是土壤性質進行定點、變量的施噴作業。
本研究以一桿式噴藥車為對象，於噴藥車上安裝全球定位系統來獲得即時的動態位置資訊，並配合一比例式流量控制閥，藉由控制施噴系統之回流量來達到變率施噴的效果。
實驗方法如下：實驗分為室內靜態模擬、流量測試及噴嘴校正。在室內靜態模擬部分主要藉由儀器中模擬之弁遄A模擬進入設定之田區中後系統的動作過程。在流量測試方面則是測定在不同壓力下改變比例閥之開度其流量的變化。於噴嘴校正部分為針對誤差較大的幾個噴嘴做反覆的調整，使其能接近到合乎要求的範圍。
實驗結果顯示：比例閥之開度以全關、18﹪、40﹪、50﹪及全開共5段變化，噴嘴經校正後其流量和時間也成一線性之關係。

關鍵字

桿式噴藥車 ； 變率施噴 ； 全球定位系統 ； 精準農業

並列摘要

To meet the demand of modern systems in precision agriculture, a variable-rate spraying system on the boom sprayer is automatically controlled by GPS (Global Positioning System) studied in this study. This system may control the spraying of pesticide and herbicide with a proportional control valve for flow rate and can reach a best policy for parameters between the plant diseases and the properties of environment by controlling the real-time dynamic position and backflow rate.
In this study, experimental methods are divided into three parts-dynamic simulation function, flow rate test and the nozzle correction. By using the simulation function of the instrument, the field operation of the boom sprayer is simulated and the detailed system results are observed. In the flow rate test, the opening of the proportional valve under different pressures are changed and various feed back conditions of the flow rate are recorded. In order to eliminate the errors of some nozzles, experiments are done several times by correcting the nozzles to obtain the acceptable results.
Experimental results show that with five different valve openings of 0 ％,18 ％,40 ％,50 ％ and 100 ％. The flow rate is also linearly proportional to the increase of time through the correction of nozzles.

並列關鍵字

GPS ； boom sprayer ； variable-rate spraying ； precision agriculture

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