Full-Wireless Field Monitoring Server for Advanced Sensor-network
Full-Wireless Field Monitoring Server for Advanced Sensor-network
复制标题
适用于高级传感器网络的全无线现场监控服务器
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
H. Haoming
中科院分区：
文献类型：
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作者：
M. Hirafuji;T. Fukatsu;H. Haoming
现场服务器（FS）是一种坚固的服务器，可以安装在现场。现场监控服务器（FMS）是一种用于监控的FS。到目前为止，嵌入在FMS顶部的太阳能电池仅用作光强传感器。FMS的电源由电缆提供，因为太阳能电池的电力本身不足以运行传统的FMS。利用无线传感器网络在农田尤其是水田中构建大规模分布式监测系统，供电电缆是一个障碍。我们开发了节能技术，使太阳能电池可以驱动FMS。提出了一种新的网络体系结构，它结合了接入点（热点）、接入点间的自组织网络（中继模式）和客户端到接入点的连接。传统的有线FMS通过使用ad-hoc网络作为骨干，其中电力通常由电缆或更大的太阳能电池提供。同时，传统的FMS提供了一个热点，居民，角板和全无线FMS也可以通过客户端连接到互联网。全无线FMS的能耗是传统FMS的一半。然而，嵌入式太阳能电池驱动FMS的能耗必须降低到1/200-1/1000。还引入了睡眠模式，在现场服务器代理收集数据后立即关闭FMS。
Field Server (FS) is a rugged server which can be installed in fields. Field Monitoring Server (FMS) is a kind of FS for monitoring. So far, solar cell embedded on the top of FMSs have been used only as a light intensity sensors. The power source for FMS is supplied by a cable, since the solar cell's power alone is not sufficient to run conventional FMSs. To construct a massively distributed monitoring system by using wireless sensor network in fields - especially in paddy fields, a power supply cable is obstructive. We developed power-saving technologies so that the solar cell can drive the FMS. New network architecture was developed which combined access-point (hotspot), ad-hoc network among access-points (repeating mode) and client connection to access-point. Conventional wired FMSs function as a backbone by using an ad-hoc network, where power is usually supplied by cable or larger solar cell. Simultaneously, the conventional FMSs provide a hotspot, where residents, gussets and full-wireless FMSs also can connect to the Internet by client connection. Energy consumption of full-wireless FMSs is half that of conventional FMSs. Yet energy consumption must be reduced up to 1/200-1/1000 for embedded solar cell to drive the FMS. Sleep mode also is introduced, and FMS is switched off immediately after the Fieldserver-agent collects data.