WRSN中基于磁耦合谐振充电技术的能量补充方法研究

【作者】 潘琪；

【导师】 戴伟；

【作者基本信息】 昆明理工大学 ， 计算机技术， 2021， 硕士

【摘要】 能量补充问题是无线可充电传感器网络(Wireless Rechargeable Sensor Networks,WRSN)的重要的一个研究课题,借助磁耦合谐振充电技术,可实现单个充电装置同时对充电覆盖范围内的多个传感器节点进行能量补充,还能够实现多跳充电从而有效延申充电距离,提高网络充电效率。本文基于磁耦合谐振充电技术,从单对多和多跳两个角度提出两种可行有效的方案对WRSN进行能量补充,主要研究内容如下:第一、借助磁耦合谐振充电技术,可实现单个充电装置同时对多个传感器节点进行能量补充,从而提高网络充电效率,降低充电成本。现有的单对多充电方案往往忽略了磁耦合谐振充电技术的能量分配,对于移动充电器的停靠位置(即驻点)没有考虑发射线圈与接收线圈、以及多个接收线圈之间的高度、角度和距离等物理因素产生的互感对能量传输效率的影响。本文主要考虑距离产生的互感,提出一种在线能量补充策略(OMRN),该策略基于互感模型和连续平面上的重心法选址问题,根据线圈之间的距离找出移动充电器的最优驻点,让多个节点能量接收达到均衡,从而减少总充电时长,使充电效率最大化。第二、能量可以通过谐振中继器实现多跳传输,如此可以延长充电距离。本文提出在执行器上配置谐振中继器,由于执行器是可移动并且可控的,可以让执行器移动至合适的中继位置,能量通过执行器转发至充电覆盖范围内的多个传感器节点,这样能够使多个节点同时充电,减少充电时长,并且在网络拓扑发生变化后,基站会重新基于带权集合覆盖问题到数量最少,权重和最小的中继位置集合。仿真实验表明,本文提出的方法可以显著减少充电成本和充电时延,减少节点失效率,从而延长网络生存时间。更多还原

【Abstract】 The energy replenishment problem is an important research topic in Wireless Rechargeable Sensor Networks(WRSN).This paper is based on the magnetic coupling resonant charging technology.Based on the magnetic coupling resonant charging technology,this paper proposes two feasible and effective solutions for energy replenishment of WRSNs from both single-to-multiple and multi-hop perspectives,and the main research contents are as follows.First,with the help of magnetically coupled resonant charging technology,a single charging device can realize energy replenishment of multiple sensor nodes simultaneously,thus improving the network charging efficiency and reducing the charging cost.Existing single-to-multiple charging schemes tend to ignore the energy distribution of magnetically coupled resonant charging technology,and the impact of mutual inductance on energy transfer efficiency generated by physical factors such as height,angle and distance between the transmitting and receiving coils,and multiple receiving coils is not considered for the docking position(i.e.,stationing point)of the mobile charger.In this paper,we mainly consider the mutual inductance generated by distance,and propose an online energy replenishment strategy(OMRN),which is based on the mutual inductance model and the siting problem of the center of gravity method on the continuous plane,to find the optimal stationing point of the mobile charger based on the distance between coils,so that the energy reception of multiple nodes can be balanced,thus reducing the total charging time and maximizing the charging efficiency.Second,the energy can be transmitted through resonant repeaters to achieve multihop transmission,so that the charging distance can be extended.In this paper,we propose to configure resonant repeaters on the actuators,and since the actuators are movable and controllable,the actuators can be moved to suitable relay positions,and the energy is forwarded to multiple sensor nodes within the charging coverage area through the actuators,which enables multiple nodes to charge at the same time and reduces the charging time,and after the network topology changes,the base station will revert to the least number of relay positions based on the set of band weights to cover the problem,The set of relay locations with the least number of weights and weights.Simulation experiments show that the method proposed in this paper can significantly reduce charging cost and charging delay,reduce node failure rate,and thus extend the network survival time.更多还原