| 摘要: |
| 针对当前温室环境监测中存在的信号遮挡物多、监测范围大、管理不便等问题，设计一种基于无线传感器网络的温室环境信息远程监测系统。无线传感器网络采用433 MHz射频进行信息传输，无线传感器节点和汇聚节点分别采用MSP430F149和LPC2478作为微控制器，实现温室环境信息的实时采集、信息汇聚和数据融合。系统采用星型网络拓扑结构，通过定时休眠、传感器掉电控制等方法来减少能量消耗，并通过基于CSMA/CA算法的无线传输协议，避免了节点间信息传输冲突，保证了传输成功率。无线传感器节点通信性能测试结果表明：使用10 dBm射频功率时，距地表1.5 m节点的有效通信距离为192 m；在无太阳能充电且节点工作周期为30 min18 s的情况下，无线传感器节点生命周期理论值为98 d。温室环境信息远程监测应用结果表明，该系统具有低功耗、高稳定性等优点，节点平均丢包率仅为1.1%。 |
| 关键词: 无线传感器网络 温室监测 无线传输 环境信息 |
| DOI：10.11841/j.issn.1007-4333.2014.05.23 |
| 投稿时间：2013-12-17 |
| 基金项目:高等学校博士学科点专项科研基金资助项目（20110008130006）；北京市共建项目专项 |
|
| Remote environmental monitoring system forgreen house based on WSN |
|
ZHANG Chuan-shuai, ZHANG Tian-jiao, ZHANG Man, LIU Gang, WANG Hui, YU Liang-liang, LI Ting
|
| (Key Laboratory of Modern Precision Agriculture System Integration Research of Ministry of Education, China Agricultural University, Beijing 100083, China) |
| Abstract: |
| A remote monitoring system for greenhouse was designed based on Wireless Sensors Network, aiming to avoid the negative effects brought by obstructions to signal and complicated wiring and inconvenient management.The sensor nodes were developed based on MSP430F149 as the core and nRF905 RF chip as the wireless communication module, both of them powered by solar battery.The sink node was developed based on MSP430F149 as the core, which could be used to collect and transmit data.The whole system could realize the greenhouse environmental information collection and transmission in real time.In this system, star network topology was accepted, and the energy consumption was reduced through regular sleep and power-down.CSMA/CA algorithm for wireless transmission protocol was accepted to avoid the conflict of information transmission between sensor nodes.The communication performance testing results showed that the effective communication distance was 192 m when 10 dB RF power was used and the sensor nodes were installed at the height of 1.5 m.The system had low power consumption, high stability, and so on.The average packet loss rate was 1.1%.In sunny conditions, it could work for a long time. |
| Key words: wireless sensor network greenhouse monitoring wireless transmission environmental information |
