scholarly journals Electromagnetic Field Based WPT Technologies for UAVs: A Comprehensive Survey

Electronics ◽  
2020 ◽  
Vol 9 (3) ◽  
pp. 461 ◽  
Author(s):  
Minh T. Nguyen ◽  
Cuong V. Nguyen ◽  
Linh H. Truong ◽  
Anh M. Le ◽  
Toan V. Quyen ◽  
...  
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Energy Supply ◽  
Electronic Device ◽  
Working Time ◽  
Wireless Power ◽  
Trade Off ◽  
Comprehensive Survey ◽  
Harvesting Techniques ◽  
Common Problems ◽  
Or Applications

Wireless power transfer (WPT) techniques are important in a variety of applications in both civilian and military fields. Unmanned aerial vehicles (UAVs) are being used for many practical purposes, such as monitoring or delivering payloads. There is a trade-off between the weight of the UAVs or their batteries and their flying time. Their working time is expected to be as long as possible. In order to support the UAVs to work effectively, WPT techniques are applied with UAVs to charge secondary energy supply sources in order to increase their working time. This paper reviews common techniques of WPT deployed with UAVs to support them while working for different purposes. Numerous approaches have been considered to illustrate techniques to exploit WPT techniques. The charging distances, energy harvesting techniques, electronic device improvements, transmitting issues, etc., are considered to provide an overview of common problems in utilizing and charging UAVs. Moreover, specific problems are addressed to support suitable solutions with either techniques or applications for UAVs.

scholarly journals Aerodock (a smart, autonomous charging and docking station for unmanned aerial vehicles)

2022 ◽  
Vol 2161 (1) ◽  
pp. 012058
Author(s):  
Laaboni Mukerjee ◽  
Mukul Yadav ◽  
Amit Choraria ◽  
Atharv Tendolkar ◽  
Arjun Hariharan ◽  
...  
Keyword(s):  
Cloud Computing ◽  
Unmanned Aerial Vehicles ◽  
Performance Optimization ◽  
Wireless Power Transfer ◽  
External Factors ◽  
Battery Management ◽  
Human Intervention ◽  
Wireless Power ◽  
Aerial Vehicles ◽  
And Performance

Abstract The COVID-19 pandemic has laid bare the need for contactless operations. While unmanned aerial vehicles (UAVs) are being developed to aid humans in countless domains, the need for effective battery management and performance optimization remains a huge task. The proposed solution, the “AeroDock”, aims to tackle these challenges by using wireless power transfer (WPT) technology coupled with smart monitoring of the drone’s health. The performance and hardware checks are assessed at the user end via cloud computing and IoT technology. This system is contact-less, safe, reliable and its usage is not affected by external factors. Thus, the AeroDock is a smart docking station for UAVs which eliminates the need for human intervention in effective charging and maintenance.

scholarly journals Recent advances in metamaterials for simultaneous wireless information and power transmission

Nanophotonics ◽  
2022 ◽  
Vol 0 (0) ◽  
Author(s):  
Shuncheng Tian ◽  
Xuanming Zhang ◽  
Xin Wang ◽  
Jiaqi Han ◽  
Long Li
Keyword(s):  
Wireless Communications ◽  
Energy Harvesting ◽  
Information Transmission ◽  
Power Transmission ◽  
Future Research ◽  
Wireless Power ◽  
Recent Advances ◽  
Comprehensive Survey ◽  
Em Theory ◽  
Wireless Energy Harvesting

Abstract In the last two decades, metamaterials and metasurfaces have introduced many new electromagnetic (EM) theory concepts and inspired contemporary design methodologies for EM devices and systems. This review focuses on the recent advances in metamaterials (MMs) for simultaneous wireless information and power transmission (SWIPT) technology. In the increasingly complex EM world, digital coding and programmable metamaterials and metasurfaces have enabled commercial opportunities with a broad impact on wireless communications and wireless power transfer. In this review, we first introduce the potential technologies for SWIPT. Then, it is followed by a comprehensive survey of various research efforts on metamaterial-based wireless information transmission (WIT), wireless power transmission (WPT), wireless energy harvesting (WEH) and SWIPT technologies. Finally, it is concluded with perspectives on the rapidly growing SWIPT requirement for 6G. This review is expected to provide researchers with insights into the trend and applications of metamaterial-based SWIPT technologies to stimulate future research in this emerging domain.

Formation of Nano-Textured Silicon Surface Layer (or Nanowires) by Silver Ion-Assisted Etching

2011 ◽  
Vol 287-290 ◽  
pp. 265-269
Author(s):  
J Tang ◽  
Hong Yan Zhang ◽  
Z.Q Ma
Keyword(s):  
Refractive Index ◽  
Silicon Nanowires ◽  
Silicon Surface ◽  
Electronic Device ◽  
Low Cost ◽  
Surface Recombination ◽  
Normal Incidence ◽  
Surface Reflectance ◽  
Trade Off ◽  
Broadband Antireflection

To obtain an ultralow surface reflectance and reach broadband antireflection effects,in this paper, silicon nanowires (SiNWs) layer has been fabricated by low-cost and easy-made silver-assisted etching techniques.The morphologies, reflectance and surface recombination of the samples were separately characterized. The ultralow reflectance below 3% from 300 to 800 nm under normal incidence has been realized in the case of ~ 1 μm long SiNWs whose geometry structures approximate to multi-layer gratings stack and the refractive index gradually increases from the top to the bottom of substrate. However, surface recombination of SiNWs deteriorates due to numerous dangling bonds and residual silver. Therefore, a trade-off between antireflection effect and recombination loss is the key to the electronic device.

scholarly journals Wearable Embedded Intelligence for Detection of Falls Independently of on-Body Location

Sensors ◽  
2019 ◽  
Vol 19 (11) ◽  
pp. 2426 ◽  
Author(s):  
José Alves ◽  
Joana Silva ◽  
Eduardo Grifo ◽  
Carlos Resende ◽  
Inês Sousa
Keyword(s):  
Sampling Rate ◽  
Fall Detection ◽  
The Elderly ◽  
Activity Level ◽  
False Alarms ◽  
Trade Off ◽  
Number Of False Alarms ◽  
Body Location ◽  
Common Problems ◽  
Reliable Solution

Falls are one of the most common problems in the elderly population. Therefore, each year more solutions for automatic fall detection are emerging. This paper proposes a single accelerometer algorithm for wearable devices that works for three different body locations: chest, waist and pocket, without a calibration step being required. This algorithm is able to be fully executed on a wearable device and no external devices are necessary for data processing. Additionally, a study of the accelerometer sampling rate, that allows the algorithm to achieve a better performance, was performed. The algorithm was validated with a continuous dataset with daily living activities and 272 simulated falls. Considering the trade-off between sensitivity and the number of false alarms the most suitable sampling rate found was 50 Hz. The proposed algorithm was able to achieve a trade-off of no false alarms and 89.5% of fall detection rate when wearing the sensor on the user’s waist with a medium sensitivity level of the algorithm. In conclusion, this paper presents a reliable solution for automatic fall detection that can be adapted to different usages and conditions, since it can be used in different body locations and its sensitivity can be adapted to different subjects according to their physical activity level.

Analysis and Design of Temperature Monitoring Device for Switchgear Cabinet Based on Resonant Coupling Wireless Energy Supply

2014 ◽  
Vol 1070-1072 ◽  
pp. 641-646
Author(s):  
Kang Li ◽  
Guo Qiang Zhang ◽  
Run Rui Guo
Keyword(s):  
Energy Supply ◽  
Temperature Monitoring ◽  
Prototype System ◽  
Monitoring Device ◽  
Wireless Power ◽  
Resonant Coupling ◽  
Analysis And Design ◽  
Potential Part ◽  
Processing Module ◽  
On Line

On-line temperature monitoring provides the means to evaluate the state of equipment and timely detect abnormality. However the power source of temperature sensing units, including sensor, transceiver and microcontroller, is not perfectly ready. In this paper, a monitoring device is proposed based on resonant coupling wireless energy supply. One feasible structure of the device is present. The device includes two parts. One is the measurement module which is placed on the high potential part, the other one is the processing module which is placed on the low potential part. The power and transfer distance demand of the measurement module is analyzed. Then a wireless power transfer system is designed to fulfill the need. A prototype system is founded to confirm the validity of our design. The results show that the device can work normally while the measurement and the processing module is 10cm away from each other, which means the proposed system is practicable. The EMI and other characteristics will be studied in the following work.

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