基于Modbus协议的农田气象信息监测站设计  

Design of farmland meteorological information monitoring station based on Modbus protocol

作　　者：赵小强 陈玉兵 高强 权恒 韩亚洲 Zhao Xiaoqiang;Chen Yubing;Chen Yubing;Quan Heng;Gao Qiang(School of Communications and Information Engineering,Xi′an University of Posts and Telecommunications,Xi′an 710121,China;Shaanxi Key Laboratory of Information Communication Network and Security,Xi′an 710121,China)

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710121 [2]陕西省信息通信网络及安全重点实验室,陕西西安710121

出　　处：《电子技术应用》2018年第12期55-59,64,共6页Application of Electronic Technique

基　　金：陕西省科技统筹创新工程计划项目(2016KTCQ01-26)

摘　　要：为了实现农田现场环境多参数信息动态精准感知,提高农业生产水平,设计了一种适用于农田环境的气象监测站。首先,设计了基于Modbus协议的数据采集硬件电路以及数据上传4G网关节点电路。其次,将DMA控制器应用于串口空闲中断模式下,实现了Modbus采集数据时的高效接收。最后,网关节点通过EDP协议传输数据至物联网云平台进行分析、评价、处理。该农田气象监测站单一站点支持拓展32路传感器实时采集,解决了以往农田无线传感器网络节点部署时单一节点采集参数单一且采集周期过长的问题,满足精准农业农田环境监测的需求。In order to achieve dynamic and accurate measurement of multiple parameter information in farmland environment and improve the level of agricultural production,a weather monitoring station suitable for farmland environment is designed.Firstly,data acquisition hardware circuit based on Modbus protocol and data upload4G gateway node circuit are designed.Secondly,the DMA controller is applied to the idle interrupt mode of the serial port to achieve efficient reception of Modbus data acquisition.Finally,the data is transmitted by the gateway node through the EDP protocol to the IoT cloud platform for analysis,evaluation and processing.The single site of the farmland meteorological monitoring station supports the real-time acquisition of32-channel sensors,which solves the problem that the single node acquisition parameters are single and the acquisition cycle is long in the past deployment of farmland wireless sensor network nodes,and meets the needs of accurate agricultural farmland environment monitoring.

关 键 词：农田气象监测 MODBUS协议 4G网关 DMA控制器 EDP协议 数据采集 无线传感器网络 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]