Research On Density-aware Highly Effective Wireless Power Transfer Technology

Recently,more and more rechargeable devices have appeared in people's lives;the popularization of rechargeable devices has improved quality of life and promoted social development.However,most of these devices are powered by batteries,and are easy to fail due to the limited battery capacity.Because of environmental restrictions,these devices are not always supplied energy in a wired manner.For the energy supplement problem of rechargeable devices,the traditional solu-tions include energy conservation and energy harvesting.Energy conservation does not supply energy for devices,and it can not solve the problem in essence.Energy harvest-ing can provide energy for devices,but the progress is inefficient and uncontrollable.With the development of wireless power transfer technology,researchers have proposed employing mobile chargers to supply energy for devices.Although wireless power transfer technology has many advantages,such as non-contact?stable and re-liable,the energy usage effectiveness is not desirable which constrains the usage of wireless power transfer technology.This paper focuses on an essential issue in this area:how to maximize energy usage effectiveness to reduce the operating cost of wire-less charging services.Because of the diversity of deployed area,rechargeable devices may be uniformly distributed or non-uniformly distributed in the deployed area,and this paper researches the density-aware highly effective wireless power transfer tech-nology.The main contributions of this paper are summarized as follows:(1)For the situation where devices are distributed uniformly in the deployed area,this paper proposes the power transfer mechanism based on the cross mobile charge.This paper first considers the scene of 1D distribution of devices,and constructs the loss optimization model which can carefully determines the charging position,charging time and coverage of the mobile charger.This paper proposes the idea of cross mobile charge,and introduces 1D-CMC algorithm.Then,this paper considers the scene of 2D distribution of devices.This paper uses the method of clustering and constructing Hamiltonian cycle to convert 2D scene into 1D manifold scene.This paper converts the problem of determining the charging position into a minimum circle coverage problem,and uses RIA algorithm to solve it.This paper determines the charging time based on the principle of maximizing the REUE index,and the coverage of the mobile charger based on the concept of the search radius.Finally,this paper proposes the 2D-CMC algorithm.(2)For the situation where devices are distributed non-uniformly in the deployed area,this paper proposes the power transfer mechanism based on the distribution den-sity of devices.This paper selects some devices as core objects based on the number of devices in its neighborhood.Then,part of these core objects are selected as the charg-ing positions of the mobile charger based on the principle of maximizing the REUE index.In order to ensure that mobile power can charge each device,this paper attempts to select more devices as core objects.Finally,this paper presents the Density-aware algorithm for the scene of non-uniform distribution of devices.In summary,this paper focuses on the research of density-aware highly effective wireless power transfer technology for rechargeable devices.This paper considers the situation where devices are uniformly deployed,and proposes the power transfer mech-anism based on the cross mobile charge.And,it also considers the scene where devices are non-uniformly deployed,and presents the power transfer mechanism based on the distribution density of devices.