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GPS自動噴藥機之開發一變率施噴系統基礎研究 Taiwan Agricultural Research Institute
葉仲塞; 廖盈達; 梁連勝; Chung-Kee Yeh; Ying-Tar Liao; Lien-Sheng Liang.
[[abstract]]本研究以一農用桿式噴藥車為研究對象,於該噴藥車上架設全球定位系統接收儀,以便即時獲取噴藥車在田區的空間座標,並於噴藥車的施噴系統加入比例式流量控制閥。比例閥閥口開度所對應的相對流量與接收儀即時定位精度則由實驗結果獲得,從而找出系統施噴工作曲線與接收儀即時定位誤差。首先個別設計變率施噴系統,然後再對系統進行實驗模擬與分析。在施噴系統方面,利用控制系統的回流量來改變施噴量,以動態方式測試此系統,在不同幫浦設定壓力下比例閥閥口開度與回流量關係,最後將實驗數據進行迴歸分析,以了解比例閥開度特性,並找出其工作曲線。實驗結果分析顯示:比例閥閥口對流量可控制開度在11%~64%間,若將開度以三段20%、40%、60%設定再配合五種設定壓力,則能產生施噴量從7LPM~34LPM 的15 段變率施噴效果,可以運用在多變的作業環境上。 In the field, the real time position of the boom sprayer is obtained from a GPS receiver according to its space coordinate data. For the spraying system in the boom sprayer the feasibility is investigated by adding a proportional flow control valve. The opening of this control valve corresponding to the flow rate and real time error of the GPS receiver are obtained by experiment. First, a...
Palavras-chave: 精準農業; 桿式噴藥車; 變率施噴; 全球定位系統; 地理資訊系統 水稻精準農業體系 Precision agriculture; Boom sprayer; Variable-rate spraying; GPS; GIS Rice Precision Farming System [[classification]]8.
Ano: 2003
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變率施噴系統之研發與評估 Taiwan Agricultural Research Institute
梁連勝; 陸龍虎; 徐武煥; 黃國祥; 蔡致榮; Lien-Sheng Liang; Lung-Hu Lu; Wuu-Huann Shyu; Guo-Shiang Hwang; Jyh-Rong Tsay.
[[abstract]]一組以專家決策系統事先編製地圖為基礎之變率施噴系統被研發,以適應台灣稻田之空問變異,使用Mid-Tech 公司TASC 6200 主控器之流量控制噴霧系統當主要架構,以執行一般的自動噴霧功能。變率施噴系統之評估已測試了差分全球定位系統(DGPS)接收器之靜態與動態訊號反應、噴藥機施噴流量及噴嘴流量/噴桿樣式。本研究主要結果如下:具有平均靜態誤差大約1.6m 與平均2DRMS 值大約2.3m ,此差分全球定位系統RX-400p 接收器之準確度足以用於導航,但尚不足以適用於田間工作。動態準確度測試所得之趨勢與其他的研究者獲致之結果有差異,不過差分全球定位系統的速率資料可用以提供噴霧機速度資訊。此差分全球定位接收器在行進速度0.2 至l m / s 時,於經緯度方向表現一致而具有平均動態位置誤差2.23m ,而在行進速度0.4 至l m/s 時其平均偏差時間為3.48 秒。較高的噴施率及行進速度會導致較高的噴霧機流量誤差,校正係數153.1 及155 可用以校正流量計而無明顯之差異。四種噴嘴型式之噴嘴流量/噴桿樣式由於變異係數值皆小於5% ,顯然相當一致,本研究所收集之資料對改良及運用適於台灣情況之變率施噴機具提供極有價值的資訊。 A variable rate chemical application system based on prescription maps from an accompanying expert decision system was developed to accommodate in-field spatial variability of paddy fields in Taiwan. A flow-based spraying system...
Palavras-chave: 變率噴霧; 差分全球定位系統; 稻田; 精準農業 水稻精準農業體系 Variable rate spraying; DGPS; Paddy field; Precision farming Rice Precision Farming System [[classification]]8.
Ano: 2003
Registros recuperados: 2
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