基于无线数传技术的智能农机载高光谱采集系统的研究

Study on Intelligent System of Hyper-Spectral Data Gathering Based on Wireless Data Communication Technology in Farm Machinery

为了解决精确农业中高密度的、全面的农田信息采集、数据无线传输和实时处理分析的需要,文章中所讨论的系统利用计算机技术和无线数传技术对GPS,GIS和RS进行有机集成,一方面系统通过AT89lv52单片机,使差分GPS和高光谱仪有机集成,能为采集到的光谱数据提供高精度的空间位置属性,实现光谱数据采集、定位一体化;另一方面利用nRF905数传模块实现数据采集控制系统与微机的数据信息和控制信息互传;同时利用Visual Basic和Map Objects控件集成GIS,实现了具有空间属性的光谱数据可视化管理和分析处理,实时地显示动点轨迹、各图层对应点属性,计算作物微分光谱和植被指数NDVI等功能,为专家系统和决策支持系统提供充足的信息。

In order to meet the needs of highly dense and overall farmland information gathering, wireless data communicating, and real-time processing in the precision agriculture, this system integrated GPS, GIS and RS based on the technology of computer and wireless data transmission. On the one hand, the system makes DGPS and Hyper-spectrograph integrated through the AT891v52 MCU, providing the accurate space position and realizing the integration of spectrum data acquisition and orientation. On the other hand, the system realizes the communication between the data gathering control system and the microcomputer by using the nRF905 system. Meanwhile the system has realized the visualized analysis and management of the spectrum data by integrating Visual Basic and Map-Objects into GIS, displaying real-time trace of moving point and some related attributes of the moving point in map layers, and calculating crop derivative spectra and crop vegetation index NDVI etc. Thus, sufficient information was provided for expert system and decision support system of precision agriculture