| 引用本文: | 李丹,孙利新,戴巍,王霓虹.森林生境因子无线传感器网络采集系统[J].哈尔滨工业大学学报,2014,46(7):123.DOI:10.11918/j.issn.0367-6234.2014.07.021 |
| LI Dan,SUN Lixin,DAI Wei,WANG Nihong.Wireless sensor networks system of forest habitat factors collection[J].Journal of Harbin Institute of Technology,2014,46(7):123.DOI:10.11918/j.issn.0367-6234.2014.07.021 |
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| 摘要: |
| 为了改善传统森林调查过程中,森林温度、湿度、光照强度等生境因子获取手段单一、动态变化不及时等缺陷,运用嵌入式技术和无线传感器网络技术,完成了森林生境因子自动采集系统．采用LPC2148为主控制芯片,以MYSQL作为系统数据库,AecGIS Server为GIS平台,通过BH1750FVI光照传感器和SHT11温湿度传感器共同研制采集装置,将实时获取的森林生境因子数据经nRF905无线通信模块发回上位机入库,并由WebGIS实时显示生境因子的动态变化．实验结果表明,在传感器节点之间应用的通信协议中引入数据包编号机制和时间同步机制可以缓解网络阻塞,降低网络丢包率．当无线通信模块的发射频率设置为433 MHz,传输速率和发射功率分别设置为9 600 bps和10 dBm时,传感器节点间通信半径设置在小于50 m范围之内可以有效地控制误帧率． |
| 关键词: 生境因子 嵌入式 无线传感器网络 自动采集 |
| DOI：10.11918/j.issn.0367-6234.2014.07.021 |
| 分类号:TP391.4 |
| 基金项目:中央高校科研业务费(2572014CB24);“十二五”农村领域国家科技计划课题(2012AA102003-2). |
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| Wireless sensor networks system of forest habitat factors collection |
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LI Dan1, SUN Lixin2, DAI Wei1, WANG Nihong1
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(1. School of Information ＆ Computer Engineering, Northeast Forestry University,150040 Haerbin, China; 2. School of Computer Science ＆ Technology, Harbin Engineering University,150001 Haerbin, China)
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| Abstract: |
| To improve the method of collecting of forest habitat factors such as forest temperature, humidity and light intensity, an automatic collection system of forest habitat factors was completed with the use of embedded technology and wireless sensor network technology. This system used the LPC2148 embedded chip as main control chip, MySQL as the system database AecGIS Server as GIS platform, to obtain forest temperature, humidity and light intensity by the collection device composed of BH1750FVI light sensor and SHT11 temperature and humidity sensor, to establish communication with the host computer by nRF905 wireless communication module so as to store data and real-time display of the dynamic changes of the forest habitat factors in a web page. The test results showed that the data packet numbering mechanism and time synchronization mechanism used into the communication protocol of sensor nodes could alleviate network congestion and reduce the loss rate of the data packets. When the emission frequency of the wireless communication module was set to 433 MHz, the transmission rate and emission power were set to 9 600 bps and 10 dBm, the error rate of frames could be effectively controlled within the range of less than 50 meters. |
| Key words: habitat factors embedded wireless sensor network automatic collection |
