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Qingqing Zhang
Tongji University
Electrical engineeringWireless power transferComputer scienceWirelessPower transmission
11Publications
4H-index
36Citations
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Publications 16
Newest
#2Qingqing ZhangH-Index: 4
Last. Qingwen Liu (Tongji University)H-Index: 13
view all 6 authors...
Resonant Beam Charging (RBC) is a promising multi-Watt and multi-meter wireless power transfer method with safety, mobility and simultaneously-charging capability. However, RBC system operation relies on information availability including power receiver location, class label and the receiver number. Since smartphone is the most widely-used mobile device, we propose a Mask R-CNN based smartphone detection model in the RBC system. Experiments illustrate that our model reduces the smartphone scanni...
Last. Wei Chen (THU: Tsinghua University)H-Index: 69
view all 7 authors...
Resonant Beam Charging (RBC) is a wireless charging technology which supports multi-watt power transfer over meter-level distance. The features of safety, mobility and simultaneous charging capability enable RBC to charge multiple mobile devices safely at the same time. To detect the devices that need to be charged, a Mask R-CNN based dection model is proposed in previous work. However, considering the constraints of the RBC system, it's not easy to apply Mask R-CNN in lightweight hardware-embed...
#2Qingqing ZhangH-Index: 4
Last. Pengfei XiaH-Index: 19
view all 7 authors...
Resonant Beam Charging (RBC) is a promising multi-Watt and multi-meter wireless power transfer method with safety, mobility and simultaneously-charging capability. However, RBC system operation relies on information availability including power receiver location, class label and the receiver number. Since smartphone is the most widely-used mobile device, we propose a Mask R-CNN based smartphone detection model in the RBC system. Experiments illustrate that our model reduces the smartphone scanni...
#1Hao Li (Tongji University)
#2Aozhou Wu (Tongji University)
Last. Chen Wei (THU: Tsinghua University)H-Index: 26
view all 7 authors...
Resonant Beam Charging (RBC) is a wireless charging technology which supports multi-watt power transfer over meter-level distance. The features of safety, mobility and simultaneous charging capability enable RBC to charge multiple mobile devices safely at the same time. To detect the devices that need to be charged, a Mask R-CNN based dection model is proposed in previous work. However, considering the constraints of the RBC system, it's not easy to apply Mask R-CNN in lightweight hardware-embed...
Source
#1Qingqing Zhang (Tongji University)H-Index: 4
#2Gang Wang (UMN: University of Minnesota)H-Index: 11
Last. Qingwen Liu (Tongji University)H-Index: 13
view all 5 authors...
Internet of Things (IoT) is powering up smart cities by connecting all kinds of electronic devices. The power supply problem of IoT devices constitutes a major challenge in current IoT development, due to the poor battery endurance as well as the troublesome cable deployment. The wireless power transfer (WPT) technology has recently emerged as a promising solution. Yet, existing WPT advances cannot support free and mobile charging like Wi-Fi communications. To this end, the concept of mobile ene...
1 CitationsSource
#1Qingqing Zhang (Tongji University)H-Index: 4
#2Mingqing Liu (Tongji University)H-Index: 2
Last. Pengfei Xia (Tongji University)H-Index: 19
view all 6 authors...
To enable electric vehicles (EVs) to access to the Internet of Intelligent Vehicles (IoIV), charging EVs wirelessly anytime and anywhere becomes an urgent need. The resonant beam charging (RBC) technology can provide high-power and long-range wireless energy for EVs. However, the RBC system is unefficient. To improve the RBC power transmission efficiency, the adaptive RBC (ARBC) technology was introduced. In this paper, after analyzing the modular model of the ARBC system, we obtain the closed-f...
Source
#1Wen Fang (Tongji University)H-Index: 3
#2Qingqing Zhang (Tongji University)H-Index: 4
Last. Pengfei Xia (Tongji University)H-Index: 19
view all 5 authors...
Resonant beam charging (RBC) is a promising wireless power transfer technology to provide long-range, high-power, mobile, and safe wireless power for the Internet of Things devices. The point-to-multipoint (PtMP) RBC system can charge multiple receivers simultaneously similar to WiFi communications. To guarantee the quality of charging service (QoCS) for each receiver and maximize the overall earning in the PtMP RBC service, we specify the charging pricing strategy and develop the high priority ...
1 CitationsSource
#1Qingqing ZhangH-Index: 4
#2Wen FangH-Index: 3
Last. Pengfei XiaH-Index: 19
view all 6 authors...
As a long-range high-power wireless power transfer (WPT) technology, resonant beam charging (RBC) can transmit Watt-level power over long distance for the devices in the internet of things (IoT). Due to its open-loop architecture, RBC faces the challenge of providing dynamic current and voltage to optimize battery charging performance. In RBC, battery overcharge may cause energy waste, thermal effects, and even safety issues. On the other hand, battery undercharge may lead to charging time exten...
Source
#1Mingliang Xiong (Tongji University)H-Index: 2
#2Mingqing Liu (Tongji University)H-Index: 2
Last. Pengfei Xia (Tongji University)H-Index: 19
view all 6 authors...
Resonant beam charging (RBC) can realize wireless power transfer (WPT) from a transmitter to multiple Internet of Things devices via resonant beams. The adaptive RBC (ARBC) can effectively improve its energy utilization. In order to support multiuser WPT in the ARBC system, we propose the time-division multiple access (TDMA) method and design the TDMA-based WPT scheduling algorithm. Our TDMA WPT method has the features of concurrently charging, continuous charging current, individual user power ...
3 CitationsSource
#1Wen FangH-Index: 3
#2Qingqing ZhangH-Index: 4
Last. Pengfei XiaH-Index: 19
view all 5 authors...
Resonant Beam Charging (RBC) is the Wireless Power Transfer (WPT) technology, which can provide high-power, long-distance, mobile, and safe wireless charging for Internet of Things (IoT) devices. Supporting multiple IoT devices charging simultaneously is a significant feature of the RBC system. To optimize the multi-user charging performance, the transmitting power should be scheduled for charging all IoT devices simultaneously. In order to keep all IoT devices working as long as possible for fa...
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