基于ZigBee的蔬菜大棚自动灌溉系统设计

Design of Greenhouse Automatic Irrigation System Based on ZigBee

摘要:

针对蔬菜大棚内传统的有线灌溉方式布线困难，对各作物的控制效率较低等问题，设计了基于ZigBee无线技术的蔬菜大棚自动灌溉系统。系统由终端节点、协调器节点、WiFi模块以及上位机构成，使用CC2530芯片作为主控芯片，通过ZigBee网络将多个终端节点与协调器节点进行无线通讯，以RTL8710作为WiFi通讯芯片将数据上传至上位机，于上位机实时显示数据和图像曲线。设计了一种模糊控制和PID控制器的复合切换控制算法，根据采集的温湿度和光照强度，计算得到灌溉的需求量，从而对不同成长情况的作物，实现更好的控制灌溉效果。通过测试，在80m距离内保持通讯稳定，采用复合控制方法的稳态误差不超过0.6%，整个系统运行正常且控制性能优良，具有实际应用价值。

Abstract:

Aiming at the difficulties of traditional wired control methods in greenhouses, and low control efficiency of various crops. A greenhouse automatic irrigation system based on ZigBee wireless technology was designed. The system consist of terminal node, coordinator node, Wifi module and upper computer. The CC2530 chip was used as the main control chip, multiple terminal nodes and coordinator node were wireless communicated through the ZigBee network, and the data was uploaded to the WiFi communication chip by the RTL8710. The data and image curve was displayed by upper computer in real time. A composite switching control algorithm based on fuzzy control and PID controller was designed, the demand for irrigation was calculated based on the collected temperature and humidity and light intensity, the better control of irrigation effect for crops with different growth conditions was achieved. Through the test, the communication was stable within a distance of 80 meters, the steady-state error of the composite control method did not exceed 0.6 percent. The entire system ran normally and the control performance was excellent, which had practical application value.