基于ARM11的土壤湿度自动控制系统设计

不同作物的生长发育对土壤湿度有不同的需求,为了给温室大棚农作物提供一个最适宜的生长环境,结合温室大棚现有滴灌系统的特点,设计了一套以ARM11为控制核心、土壤湿度传感器为采集模块、WIFI模块为通信模块的土壤湿度自动控制系统。此系统通过控制与滴灌系统连接的电磁阀保证土壤湿度在适宜的范围内,实现了温室大棚内土壤湿度的远程监测与自动控制;温室大棚管理人员不仅能使用HTTP协议随时、随地访问嵌入式Boa WEB Server来获取实时的土壤湿度数据,还可以通过SQLite嵌入式数据库查询存储的土壤湿度的历史数据。系统测试结果表明,该系统能实现农作物土壤湿度的远程监测与智能调控,运行可靠,测量的土壤湿度绝对误差为±3%,有一定的实用性。

Design of Soil Moisture Automatic Control System Based on ARM11

Since the growth of different crops has different requirements for soil moisture,this paper designed a soil moisture automatic control system with ARM11 as control core,soil moisture sensor as collection module and WIFI module as communication module combined with the feature of the existing greenhouse drip irrigation systems,so as to provide a suitable environment for the growth of greenhouse crops.Through control the solenoid valve connecting with the drip irrigation system,the proposed system could ensure soil moisture remain in an appropriate range,hence realizing the remote monitoring and automatic control of soil moisture in the greenhouse.Besides,greenhouse manager not only could have access to the embedded Boa WEB Server anytime and anywhere to obtain the real-time soil moisture data,but also could inquire the historical data about soil moisture stored in SQLite embedded database.System test results showed that the system proposed could realize the remote monitoring and intelligent control of soil moisture,which was reliable and practical with the soil moisture absolute error of ± 3％.Therefore,the system proposed had certain practicability.