针对环境监测中异常区域分布不均匀,以及无线传感器网络中节点密集、部署冗余的特点,提出了基于嵌套网格的节能部署方法,并依据物理参数梯度设计了非均匀部署节点算法,对其环境监测应用——森林火灾监测,进行了性能分析和Matlab仿真验证,结果表明,该方法可以有效地节约网络的能量,快速发现异常区域,并能详细描述异常区域的参数分布状况。
Taking into consideration that the abnormal areas aren't distributed uniformly and nodes in wireless sensor networks (WSNs) are dense and redundant, an energy-efficient deployment strategy named Nested Grid based Energy-efficient Deployment Algorithm (NGEDA) is presented for WSNs. A non-uniform deployment algorithm is designed based on physical parameter gradient distribution. The performance of NGEDA employed in environment monitoring ( e. g. forest fire monitoring) is analyzed and validated by Matlab simulation. Results show that NGEDA is energy-efficient, can quickly find the abnomlal area, and can describe its parameter distribution in detail.