共查询到20条相似文献,搜索用时 93 毫秒
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针对目前温室大棚环境监测系统存在布线困难、灵活性低和成本高等问题,构建了基于无线传感器网络(WSN)的温室大棚环境监测系统,并重点对传感节点和网关节点进行了设计。该系统的传感器节点负责对环境参数进行采集,并通过无线传感器网络将数据发送到网关节点,网关节点再向远程监测平台传输数据。节点硬件的微处理器模块采用MSP430F149单片机进行数据处理和控制;无线通信模块由nRF905射频芯片及其外围电路组成,负责对数据进行传输和接收;传感器模块采用AM2301传感器进行数据测量;电源模块以LT1129-3.3、LT1129-5和Max660组成的电路提供3.3和±5.0 V电源。节点的无线路由协议和时间同步算法均采用C语言开发,实现节点数据采集与处理、规则转发和远程传输等功能。远程监测软件采用NET.ASP、HTML和C#开发,为用户提供形象直观的Web模式远程数据管理平台。该系统在青海省西宁市温室大棚进行了组网测试,结果表明系统运行稳定可靠,网络平均丢包率为2.4%,有效解决了温室环境监测系统中存在的问题,满足温室大棚栽培环境监测的应用要求。 相似文献
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应用蓝牙技术,可以通过无线传输方式将检测到的温室环境原始数据发送给温室环境控制系统,从而灵活、便捷地实现对温室环境的检测与控制.本文介绍了蓝牙技术、Ericsson ROK 101007 蓝牙模块及蓝牙微网构成的特点,阐述了基于蓝牙模块的温室环境检测与控制系统的硬件与软件设计方法. 相似文献
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温室环境控制系统联合移动网络与物联网技术,利用传器感将植物生长物理量转化为数字信号,并通过互联网传送给控制中心,农业技术人员以此控制温室大棚内的相应设施和设备,调整农作物生长状态,从而实现温室大棚的智能化远程管理,保证温室正常环境的同时,实现节能、节水和绿色生产。本文就物联网技术在温室环境控制系统中的应用进行探讨。 相似文献
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温室大棚自动控制系统的研究 总被引:2,自引:0,他引:2
本文阐述了一个由上下微机组成的温室综合环境自动控制管理系统。它通过对温室内的温度、湿度、光照、土壤湿度等参量的采集,并根据上述参数实现对温度、湿度、光照、土壤湿度等参数的自动调节,达到了温室大棚自动控制的目的。 相似文献
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温室环境机电控制系统设计 总被引:1,自引:1,他引:0
本文在总结分析了温室智能控制技术的基础上,设计了以8031单片机为核心,并扩展8155I/O芯片的日光温室环境机电控制系统的软件部分。该系统在初始设定的基础上,对温室内温室、湿度、光照实现自动控制。 相似文献
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本文介绍了一种使用现有GSM网络系统实现的蔬菜大棚控制系统.现有GSM网络的使用省去了通信线路的铺设,实现对温室大棚的远程控制,使测控系统投资少、建设周期短、系统构建灵活、易升级,能够很好的适应基层生产的需要. 相似文献
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近几年蔬菜温室栽培在福建省快速发展,病害发生也日趋严重,影响蔬菜品质和产量.该文从设施降湿、农业防控、化学防控等方面总结温室大棚蔬菜病害防控技术措施. 相似文献
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G. D. Pasgianos K. G. Arvanitis P. Polycarpou N. Sigrimis 《Computers and Electronics in Agriculture》2003,40(1-3):153
Climate control for protected crops brings the added dimension of a biological system into a physical system control situation. The plants in a greenhouse impose their own needs, significantly affect their ambient conditions in a nonlinear way, and add long-time constants to the system response. Moreover, the thermally dynamic nature of a greenhouse suggests that disturbance attenuation (load control of external temperature, humidity, and sunlight) is far more important than is the case for controlling other types of buildings. This paper presents a feedback–feedforward approach to system linearization and decoupling for climate control of greenhouses and more specifically for the operation of ventilation/cooling and moisturizing. The proposed method consists of three parts: (a) a model-based feedback–feedforward compensation of external disturbances (loads) on the basis of input–output linearization and decoupling; (b) the transformation of user-defined desired settings for temperature and humidity into feasible controller setpoints, taking into account the constraints imposed by the capacities of the actuators and the psychrometric laws; and (c) additional PI outer loops to compensate for model uncertainties and deviations from expected disturbances (weather). Moreover, some tuning tests lump together several physical system parameters to be easily identified, and the method guarantees accuracy in setpoint tracking while simplifying stability issues. The proposed method is applicable to any air-conditioning system and is expected to gain wide acceptance in modern climate control systems. 相似文献
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J. Bontsema E.J. van Henten Th.H. Gieling G.L.A.M. Swinkels 《Computers and Electronics in Agriculture》2011,79(1):63-66
The accuracy of sensors used in Dutch greenhouses for climate control has been assessed and the influence of sensor errors on the energy consumption and crop production has been determined using model simulations. It is shown that currently used sensors are prone to errors exceeding current standards set for practice. The extra energy consumption, due to sensor inaccuracy, is mainly caused by the sensors for global radiation and relative humidity. Sensor errors may result in a higher crop production but at the expense of a higher energy consumption resulting in a loss in economic return of the crop production process. Results indicate that sensor maintenance is economically feasible because the resulting energy savings exceed the costs of the maintenance operation. 相似文献