作　　者： ; ; ; ; ; ;

机构地区： 吉林大学

出　　处： 《农业工程学报》 2003年第1期137-141,共5页

摘　　要： 在已有划分正交网格研究的基础上 ,阐述了划分倾斜网格的必要性、方法及其应用。中国的农田多为防护林分割 ,土地规模较小 ,且防护林和垄的走向往往与经纬度线不平行 ,为了避免划分正交网格带来的麻烦和不便 ,需要因地制宜地划分倾斜网格。划分倾斜网格的方法有手工绘制和编程绘制两种。合理选择田块基点 ,VB和 Map X控件编写的网格划分程序可适用于不规则田块。网格划分主要有采样导航、专题图制作和田间识别等重要应用。该文给出了单片机田间网格识别简化算法 ,其精度为厘米级。跨田块作业时 ,只需要更新数据存储 IC卡中的田块参数和施肥量参数 ,而不必修改单片机主程序。施肥试验表明 ,该算法简单、准确、通用性好。 Based on 'Research on the Method of Making Field Grid Cells by MapBasic in Precision Agriculture', which investigated the method of making orthogonal field grid cells in precision agriculture, this paper discusses the necessity, method and application of making leaning field grid cells in precision agriculture. Making leaning field grid cells is necessary because most of the fields in China are divided by protection forest. The directions of protection forest and field ridges are usually not parallel to local longitude or latitude. This method may get rid of the trouble and inconvenience caused by making orthogonal field grid cells, in that a few fragmentary grid cells around the field would come into being. The method of making leaning field grid cells consists of drawing by hand and drawing with the help of a computer program. When the base point of a field is reasonably selected, the grid cell making program developed by VB and MapX control can be used to making the grid cells of irregular field blocks. The chief applications of the field grid cells include sampling navigation, the creation of a thematic map and grid cell identification in the field. To identify field grid cells when fertilizing with an automatic variable rate fertilizer applicator, this paper studies the algorithm of identifying field grid cells for a single chip computer, its precision is up to decimeter grade. When a tractor works in another field, it only needs to update the field block parameters and fertilizer application rate in the IC card, which is used to save data, while the main program in the single chip computer does not need to be changed. Experiments of this spring show that the algorithm is simple, precise and universal.

关 键 词： 倾斜网格 应用 精确农业 变量施肥 网络划分 网格识别 单片机控制

领　　域： [农业科学] [农业科学] [农业科学]