如何延长网络寿命是无线传感网络中一个关键问题,为此提出了基于全向无线充电模型的动态调度优化方法,目标是最大化网络寿命。文章对充电小车的停止点选择进行了分析,根据全向无线充电模型的覆盖范围确定了充电小车的停止区域,再以最大...如何延长网络寿命是无线传感网络中一个关键问题,为此提出了基于全向无线充电模型的动态调度优化方法,目标是最大化网络寿命。文章对充电小车的停止点选择进行了分析,根据全向无线充电模型的覆盖范围确定了充电小车的停止区域,再以最大化节点接收功率之和为优化目标确定每个区域内的最佳停止点。实验结果表明,所提出的方法能够延长网络寿命,与MRCR(Multi-node Renewable based on Charging Range)算法相比,可延长网络寿命约3%~113%。展开更多
It is important to verify the safety of electric vehicle(EV)wireless power transmission for child passengers by studying the electromagnetic exposure difference between the child passengers and the adult passengers.Th...It is important to verify the safety of electric vehicle(EV)wireless power transmission for child passengers by studying the electromagnetic exposure difference between the child passengers and the adult passengers.The dielectric parameters of the child passengers’body were calculated under the operating frequency of 85 kHz.Using the finite element simulation software COMSOL Multiphysics,a model was established for the child passengers and adult passengers when the EVs charged by the wireless charging coil.This paper analyzed the distribution of magnetic induction intensity and induced electric field intensity generated on the body and head when the child passengers and adult passengers sat in four different positions.Additionally,the difference between the brain electromagnetic exposure values of children and adults was analyzed and compared with the limits set.The results showed that the electromagnetic exposure was the largest when the passenger sat in the co-driver position.The electromagnetic exposure level of child was slightly higher than that of adult at the same position,and the magnetic induction intensity and induced electric field intensity of both were much smaller than the public electromagnetic exposure recommendation values.展开更多
文摘如何延长网络寿命是无线传感网络中一个关键问题,为此提出了基于全向无线充电模型的动态调度优化方法,目标是最大化网络寿命。文章对充电小车的停止点选择进行了分析,根据全向无线充电模型的覆盖范围确定了充电小车的停止区域,再以最大化节点接收功率之和为优化目标确定每个区域内的最佳停止点。实验结果表明,所提出的方法能够延长网络寿命,与MRCR(Multi-node Renewable based on Charging Range)算法相比,可延长网络寿命约3%~113%。
基金Department of Edication of Gansu Province(No.2018D-08)。
文摘It is important to verify the safety of electric vehicle(EV)wireless power transmission for child passengers by studying the electromagnetic exposure difference between the child passengers and the adult passengers.The dielectric parameters of the child passengers’body were calculated under the operating frequency of 85 kHz.Using the finite element simulation software COMSOL Multiphysics,a model was established for the child passengers and adult passengers when the EVs charged by the wireless charging coil.This paper analyzed the distribution of magnetic induction intensity and induced electric field intensity generated on the body and head when the child passengers and adult passengers sat in four different positions.Additionally,the difference between the brain electromagnetic exposure values of children and adults was analyzed and compared with the limits set.The results showed that the electromagnetic exposure was the largest when the passenger sat in the co-driver position.The electromagnetic exposure level of child was slightly higher than that of adult at the same position,and the magnetic induction intensity and induced electric field intensity of both were much smaller than the public electromagnetic exposure recommendation values.
