摘要
作物需水信息的快速获取和实时传输是实现智能诊断和精量灌溉的前提。为此,设计了一种实时采集影响作物需水多环境参数的多通道数据采集系统。该系统以超低功耗单片机MSP430F149为核心处理模块、西门子MC39i为无线传输模块,以计算作物需水量的彭曼—蒙特斯公式中的主要气象要素(温度、湿度、日照时数、风速、辐射)和土壤湿度作为采集对象,根据各传感器输出信号设计了数据采集通道数量及类型。设计选用了系统的实时时钟电路、数据存储模块、LCD液晶显示以及控制键盘等电路,开发了系统各模块的控制软件,实现了通道选择、数据采集、数据处理、液晶显示及无线数据传输等功能。经电位器模拟输出电压测试,系统能实现数据采集和实时显示的功能,可以应用于灌溉决策系统中作物需水信息的实时监测。
The paper designs a multi-channel data acquisition system based on an ultra-low power MCU MSP430F149 and GPRS wireless transmission in order to obtain real-time crop water requirement information precisely and rapidly and achieve wireless remote data transmitting. The system can acquire multiple parameters affecting crop water requirement. The article regards multi-meteorological factors （ temperature, humidity, sunshine duration, wind speed, radiation） ac- cording to penman-monteith equation and soil moisture which influences crop water requirement as collecting objects and designs channels and channels＇ type of the system based on sensors＇ output signals. The paper designs a real-time clock circuit, data storage module, LCD liquid crystal display and the keyboard circuits, etc. And develops software of each module. The system can implement channel selection, data acquisition, data processing, liquid crystal display, wireless transmission, etc. The system can achieve the functions of data acquisition and real-time display through the test, the percentage error is 2.56% , which demonstrates the system can be applied to monitoring crop water requirement informa- tion instantly in irrigation decision-making system.
出处
《农机化研究》
北大核心
2013年第3期107-112,共6页
Journal of Agricultural Mechanization Research
基金
"十二五"国家科技支撑计划项目(2011BAD29B08)
国家教育部
外专局111项目(B12007)
关键词
作物需水
多通道数据采集
单片机
无线传输
crop water requirement
multi-channel data acquisition
microcontroller
wireless transmission
