在林区野外没有公共网络覆盖的区域,传感器设备采集的林业数据和图像数据无法传输至用户,只能通过本地存储人工手动获取的方法。笔者基于Digi M10卫星通信模块开发,设计了一种面向林区野外传感器网络设备的卫星传输系统,通过ORBCOMM卫星网络进行数据传输。卫星传输系统采用主动和被动两种方式从RS232、以太网口读取传感器网络设备采集的林业调查数据和图像数据,并对数据进行分块、压缩处理后通过卫星发送到地面控制站。测试结果表明:在卫星信号良好时,卫星模块数据传输速率约为31.27 Byte/s; 当传感器数据获取时间间隔约为100 s时,卫星传输系统能及时将传感器数据上传,可有效解决传感器网络设备在林区无通信条件下的数据传输问题。
Abstract
The forestry data and the image data collected by the sensor devices can’t be transferred to the users in many regions of the remote forest areas because of the unavailability of the public network coverage. To solve this problem, a satellite transmission system oriented the sensor network equipment in remote forest areas was designed in this paper. Data, including images collected by the camera from the RS232 port and the Ethernet port related to forestry were transferred in an active or passive manner through the Digi M10 satellite modem of the ORBCOMM satellite network. At the same time, to reduce the satellite transmission pressure, splitting and compressing data blocks were also implemented in this system. Tests showed that the satellite data transmission rate was approximately 31.27 Byte/s when the satellite signal was good. When the sensor data acquisition interval was approximately 100 s, the satellite module can upload the sensor data in a timely manner. This system overcomes the data transmission difficulties between the sensor network devices and the internet when the public networks are unavailable.
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基金
收稿日期:2013-03-11 修回日期:2013-06-06
基金项目:中央级公益性科研院所基本科研业务费专项项目(IFRIT201104); 国家高技术研究发展计划(2012AA102003-3)
第一作者:陈雄华,硕士生。*通信作者:张旭,研究员。E-mail: zhangxu@caf.ac.cn。
引文格式:陈雄华,张旭,张雪芹,等. Digi M10卫星通信模块在林业传感器网络中的应用[J]. 南京林业大学学报:自然科学版,2014,38(3):144-148.
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