| Our country is a country with extremely deficient water resources.Agricultural water consumption has always been a major water user in our country,accounting for more than 60%of total water consumption,among which in-mgation water accounts for about 90%of agricultural water.In the process of implementation,the traditional high-energy and low-energy gully irrigation and flood irrigation method have huge water resource abuse and waste.According to current situation of the above,this thesis using the Intenet technology,network technology.sensor technology and automatic control technology to design a set of intelligent irrigation system based on ZigBee wireless sensor network,designed to solve the problem existed in agricultural water for a long time.The work of this thesis includes the following aspects:(1)The overall design of intelligent irrigation systems.After research and analysis the ZigBee technology and GPRS technology,determine the type to Mesh topology of ZigBee wireless network to collect soil moisture information and execute commands correspotding irrigation,GPRS as the core of the gate-way to the remote monitoring platform information transmit crop growth environment,far end monitoring platforam for control of the central control of the whole system architecture of the system operation scheme.(2)hairdware design of intelligent irrigation system.Identify CC2530 chip as the ZigBee processing chip,and can be ZigBee communication designed board module,according to the different node types,core board module is connected with the sensor and corresponding peripheral circuit design,completed the gateway,collecting the coordinator node and the execution node network node hardware design work.(3)software design of ZigBee wireless sensor network node software design and remote monitoring platform of intelligent irrigation system.The work flow of z-stack protocol Stack is analyzed.Based on this,the software design of wireless sensor network system is completed according to the running process of different network node types.Using Lab VIEW language to complete the software programming of remote monitoring platform.(4)The design of fuzzy controller for irrigation based on crop irrigation model.Based on the data model of winter wheat irrigation,humidity deviation and humidity change rate as input,output for irrigation time,complete the design of the fuzzy controller,and the policy of irrigation by MATLAB simulation.(5)complete the system hardware and software debugging and experiment,and verify the feasibility of the system.Test the communication distance and ZigBee network function of ZigBee nodes in different environments;The soil moisture sensor was adopted in the experiment.The test completes the basic functions of the whole system from collection node,execution node,routing node,gateway coordinator node to remote monitoring platform. |
