Results 121 to 130 of about 39,512 (304)

NB-IoT Using wireless power transfer antenna array as Polling Protocol

, 2016
The 3GPP had standardized NB-IoT [3]-[5] in June 2016. It provides deep indoor and wide area coverage extension of 20dB over GSM. The NB-IOT network can support 50,000 users per cell and a battery life of more than ten years.
Lin, Ting-Wei;Liao, Yu-De;Wang, An-Sung;Wong, Ching-Chang;Lee, Yang-Han;Yuan, Qiaowei;Shinohara, Naoki;Chen, Qiang
core  

Efficiency enhancement of multi-relay wireless power transfer system using switched compensation capacitors

Wireless Power Transfer
Multi-relay wireless power transfer (WPT) systems are increasingly used in power supply applications for high-voltage transmission line monitoring due to their extended transmission range.
Xinyu Hou, Meiqi Yang, Yong Shi, Zhongming Yu, Zixuan Zhao   +4 more
doaj   +1 more source

Wireless Power Transfer

Wireless power transfer (WPT) is the process of transferring electrical energy from a power source to a load without an electrical connection. The reason why WPT has become popular today can be listed as the effects that make human life easier, the absence of cable complexity, etc.
Paul D. Mitcheson, Nunzio Pucci
openaire   +3 more sources

A Pressure Microsensor Made of Parylene‐C for Use as Medical Implant

Advanced Materials Technologies, EarlyView.
A monolithic parylene‐C pressure sensor with gold strain gauges provides 6.2 μV$\mu{\rm V}$·mmHg$\cdot{\rm mmHg}$−1$^{-1}$ sensitivity. The morphology of a sputtered thin film strain sensor is granular/columnar, which results in a high gauge factor of 7.5. Thermal bonding and parylene‐C coating create a hermetic cavity.
Ann‐Kathrin Klein, Victor Krajka, Andreas Dietzel   +2 more
wiley   +1 more source

Optimal frequency estimation for wireless power transfer systems with an active rectifier

Wireless Power Transfer
Wireless power transfer (WPT) technology, renowned for its reliability and flexibility, is utilized in numerous fields. This article addresses the synchronization of the active rectifier in WPT systems.
Zhigang Zhang, Xiaodong Qing, Yanbao Liu, Tingfa Yang, Danli Chen, Fengwei Chen, Zhao Chen   +6 more
doaj   +1 more source

Hierarchical Multi‐Material Architectures With Gradient Design for Dynamic‐Range Flexible Tactile Sensing

Advanced Materials Technologies, EarlyView.
Hierarchical multi‐material TPMS lattices are engineered as flexible tactile sensors by combining soft and stiff elastomeric layers with a conformal conductive coating. The bilayer architecture delivers sensitivity at low pressures while maintaining a broad detectable range under large loads, enabling reliable pressure and vibration monitoring for ...
Reza Noroozi, Domenic Quiquero, Yan Yan Shery Huang, HaoTian Harvey Shi   +3 more
wiley   +1 more source

A reconfigurable wireless charging optimization scheme for UAVs with horizontal misalignment tolerance

Wireless Power Transfer
Unmanned aerial vehicles (UAVs) are widely used by civilians, the military, and other fields. To ensure the autonomous working ability, high levels of charging convenience are required.
Wei Wang, Kairui Li, Mingrong Duan, Chenjin Xu, Siyuan Sheng, Zheng Lu   +5 more
doaj   +1 more source

Graphene‐Interfaced Stretchable Sweat Patch for Multiplexed Electrochemical Monitoring of IL‐6, Glucose, and Calcium Ions

Advanced Materials Technologies, EarlyView.
Flexible sweat sensor patch integrating graphene‑interfaced gold microelectrodes functionalized with bio‑receptors and ion‑selective membrane, coupled with a capillary‑driven microfluidic layer and portable potentiostat electronics for multiplexed monitoring of inflammatory, metabolic, and electrolyte biomarkers in microliter sweat volumes.
Roomia Memon, Ali Tufani, Süleyman Çelik, Javed H. Niazi, Anjum Qureshi   +4 more
wiley   +1 more source

A synchronous rectification method with a high-speed comparator for a megahertz frequency BWPT system to enhance efficiency

Wireless Power Transfer
In bidirectional wireless power transfer (BWPT) systems, the phase synchronization accuracy of the secondary synchronous rectification (SR), or active rectification signal directly determines energy transfer efficiency and overall system stability.
Siqi Li, Yang Yang, Enguo Rong, Tong Li, Zhuang Sun, Xingyu Zou, Sizhao Lu, Zeeshan Shafiq, Zhe Liu   +8 more
doaj   +1 more source

Fully 3D‐Printed Wave‐Wound Electromagnetic Motors

Advanced Materials Technologies, EarlyView.
This work presents the first fully 3D‐printed wave‐wound electromagnetic motors, which are created using conductive nanoparticle inks, carbon‐filled nylon polymers, and surface mount components. These motors can achieve a stall torque of 7.62N·mmA−1$7.62 \nobreakspace N{\cdot }mm A^{-1}$ and efficiency of 28.2 %, which approaches the performance of ...
Joseph Schwalbe, Sebastian Mettes, Eduardo Francke, Kenneth W. Allen, Yi Chen Mazumdar   +4 more
wiley   +1 more source