能量收集分布式检测系统中基于门限的节点能量管理策略

Threshold Based Node Energy Management Strategy in Energy Harvesting Distributed Detection System

针对能量收集分布式检测系统由于环境能量到达随机造成系统检测性能不稳定的问题,在同时考虑节点能量不确定性、探测能量不确定性、通信能量不确定的前提下,给出了一种基于节点能量使用门限的能量管理策略的确定方法。该方法首先优化探测和通信的能量分配方式,然后根据能量到达强度,对有限能量区间进行穷举搜索,确定合理的节点能量使用门限。该方法的优势是确定的策略是一种离线策略,不占用节点通信资源,电池存储能量是唯一执行条件,简单易行。仿真表明该方法确定的节点能量管理策略与“能量到达即使用”的策略相比,有效降低了能量随机到达对系统检测性能的影响,提升了检测系统平均检测性能。

A threshold based energy management strategy was proposed to improve the detection performance of the energy harvesting distributed detection system due to the random arrival of environmental energy. Considering the uncertainties of node energy arrival,target sensing and communication,the method firstly optimizes the energy distribution between detection and communication,then carries out exhaustive search on the finite energy interval according to the energy arrival intensity,and determines reasonable threshold of node energy use. The strategy obtained is an off-line one and does not occupy node communication resources. The battery level is the only execution condition,which is simple and feasible. The simulations show that,compared with the "energy arrival and use" strategy,the proposed node energy management strategy can effectively reduce the influence of random energy arrival on the detection performance of the system,and improve the average detection performance of the detection system.