Wireless sensor networks (WSNs) are very important for monitoring underground mine safety. Sensor node deployment affects the performances of WSNs. In our study, a chain-type wireless underground mine sensor network (...Wireless sensor networks (WSNs) are very important for monitoring underground mine safety. Sensor node deployment affects the performances of WSNs. In our study, a chain-type wireless underground mine sensor network (CWUMSN) is first pre- sented. A CWUMSN can monitor the environment and locate miners in underground mines. The lowest density deployment strate- gies of cluster head nodes are discussed theoretically. We prove that the lifetime of CWUMSN with a non-uniform deployment strategy is longer than with a uniform deployment strategy. Secondly, we present the algorithm of non-uniform lowest density de- ployment of cluster head nodes. Next, we propose a dynamic choice algorithm of cluster head nodes for CWUMSN which can im- prove the adaptability of networks. Our experiments of CWUMSN with both non-uniform lowest density and uniform lowest den- sity deployments are simulated. The results show that the lifetime of CWUMSN with non-uniform lowest density deployment is almost 2.5 times as long as that of the uniform lowest density deployment. This work provides a new deployment strategy for wire- less underground mine sensor networks and then effectively promotes the application of wireless sensor networks to underground mines.展开更多
为满足农业现代化、智能化和信息化的需要,提出一种基于物联网(Internet Of Things,IOT)的农田环境监控系统,通过无线传感器网络(Wireless Sensor Network,WSN)技术,实现农田温度、光照等环境信息的自动化采集与存储。农田现场环境信息...为满足农业现代化、智能化和信息化的需要,提出一种基于物联网(Internet Of Things,IOT)的农田环境监控系统,通过无线传感器网络(Wireless Sensor Network,WSN)技术,实现农田温度、光照等环境信息的自动化采集与存储。农田现场环境信息的采集作为系统最基本功能,必须保证信息采集的完整性、可靠性和实时性,设计并实现一种既能进行网内数据聚合,又能满足超限数据紧急处理的农田现场数据汇聚机制,并针对数据汇聚过程中可能出现的超时和超限等问题,分别采取相应的应对措施。最后针对不同传感节点配备的传感器类型可能不同,设计统一的数据收集方案。结果表明,采用提出的现场数据汇聚机制的农田环境监控无线传感器网络能够正常稳定地工作,并能实时可靠地传输数据。展开更多
基金Project 20070411065 supported by the China Postdoctoral Science Foundation
文摘Wireless sensor networks (WSNs) are very important for monitoring underground mine safety. Sensor node deployment affects the performances of WSNs. In our study, a chain-type wireless underground mine sensor network (CWUMSN) is first pre- sented. A CWUMSN can monitor the environment and locate miners in underground mines. The lowest density deployment strate- gies of cluster head nodes are discussed theoretically. We prove that the lifetime of CWUMSN with a non-uniform deployment strategy is longer than with a uniform deployment strategy. Secondly, we present the algorithm of non-uniform lowest density de- ployment of cluster head nodes. Next, we propose a dynamic choice algorithm of cluster head nodes for CWUMSN which can im- prove the adaptability of networks. Our experiments of CWUMSN with both non-uniform lowest density and uniform lowest den- sity deployments are simulated. The results show that the lifetime of CWUMSN with non-uniform lowest density deployment is almost 2.5 times as long as that of the uniform lowest density deployment. This work provides a new deployment strategy for wire- less underground mine sensor networks and then effectively promotes the application of wireless sensor networks to underground mines.
文摘为满足农业现代化、智能化和信息化的需要,提出一种基于物联网(Internet Of Things,IOT)的农田环境监控系统,通过无线传感器网络(Wireless Sensor Network,WSN)技术,实现农田温度、光照等环境信息的自动化采集与存储。农田现场环境信息的采集作为系统最基本功能,必须保证信息采集的完整性、可靠性和实时性,设计并实现一种既能进行网内数据聚合,又能满足超限数据紧急处理的农田现场数据汇聚机制,并针对数据汇聚过程中可能出现的超时和超限等问题,分别采取相应的应对措施。最后针对不同传感节点配备的传感器类型可能不同,设计统一的数据收集方案。结果表明,采用提出的现场数据汇聚机制的农田环境监控无线传感器网络能够正常稳定地工作,并能实时可靠地传输数据。
