| 变量施肥电液比例控制系统的设计与实现 |
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| 引用本文： | 张 辉,李树君,张小超,王 志,王伟平.变量施肥电液比例控制系统的设计与实现[J].农业工程学报,2010,26(14):218-222. |
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| 作者姓名： | 张 辉 李树君 张小超 王 志 王伟平 |
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| 作者单位： | 中国农业机械化科学研究院，北京 100083;中国农业机械化科学研究院，北京 100083;中国农业机械化科学研究院，北京 100083;中国农业机械化科学研究院，北京 100083;中国农业机械化科学研究院，北京 100083 |
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| 基金项目： | “十五”国家科技攻关计划项目“精准农业机械装备技术开发与应用” |
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| 摘 要： | 为了提高肥料的利用率，同时减少肥料浪费以及多余肥料对环境的不良影响，该文设计开发了一套以MC68HC908GP32单片机为中心的自动变量施肥控制系统。该系统通过RS-485总线接收上位机根据GPS、GIS 数据对应的流量信息，由单片机实时控制液压执行机构，变量输出田间不同位置的施肥量。通过对施肥机实验室静止试验和田间动态试验验证，变量控制可靠，作业效果良好，施肥控制精度小于4%。
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| 关 键 词： | 变量播种施肥机，精准农业，单片机，电液比例控制 |
| 收稿时间： | 2010/4/19 0:00:00 |
| 修稿时间： | 2010/9/30 0:00:00 |
Development and performance of electro-hydraulic proportion control system of variable rate fertilizer |
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| Zhang Hui,Li Shujun,Zhang Xiaochao,Wang Zhi and Wang Weiping.Development and performance of electro-hydraulic proportion control system of variable rate fertilizer[J].Transactions of the Chinese Society of Agricultural Engineering,2010,26(14):218-222. |
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| Authors: | Zhang Hui Li Shujun Zhang Xiaochao Wang Zhi and Wang Weiping |
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| Abstract: | For raising the utilization rate of fertilizer, decreasing fertilizer waste and its environmental pollution, electro-hydraulic proportion control system was developed for variable rate fertilizer applicator by using MC68HC908GP32 MCU as the core control unit. The upper computer acquires GIS information from GPS-based service to generate the position nutrient recommendation and then transmits the data to variable rate fertilization embeded?system through RS485 bus. The embeded?system controls hydraulic actuator and realizes variable flow rate fertilization at different position in real-time. Through static test in laboratory and dynamic practical application in field, the system was proved to be reliable for variable control with good effect. The control precision was less than 4%. |
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| Keywords: | variable rate fertilizer applicator precision agriculture single-chip computer electro-hydraulic proportion control |
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