scholarly journals An UHF-Band wireless power transfer system for structural health monitoring sensor network

2013 ◽  
Vol 2 (2) ◽  
pp. 55-61
Author(s):  
Tansheng Li ◽  
Kikuzo Sawada ◽  
Harutoshi Ogai ◽  
Zhong Han ◽  
Wa Si ◽  
...  
Keyword(s):  
Structural Health Monitoring ◽  
Sensor Network ◽  
Health Monitoring ◽  
Wireless Power Transfer ◽  
Transfer System ◽  
Power Transfer ◽  
Wireless Power ◽  
Structural Health ◽  
Wireless Power Transfer System ◽  
Uhf Band

scholarly journals UHF-Band Wireless Power Transfer System for Structural Health Monitoring Sensor Network

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Tansheng Li ◽  
Kikuzo Sawada ◽  
Harutoshi Ogai ◽  
Wa Si
Keyword(s):  
Wireless Sensor Network ◽  
Sensor Network ◽  
Wireless Power Transfer ◽  
Wireless Sensor ◽  
Transfer System ◽  
Power Transfer ◽  
Wireless Power ◽  
Wireless Power Transfer System ◽  
Transmitting Antenna ◽  
Uhf Band

For detecting and measuring health conditions of bridges, wireless sensor networks are used in these days. However, battery life is critically restricting the application and maintenance cost of sensor network systems. To extend life time, a wireless power transfer system at UHF band is introduced to supply the current wireless sensor network. This power transfer system is based on electric wave at 950 MHz. This power transfer system is redesigned for tiny power transmission, including a combination of a rectenna and a Cockcroft-Walton boost converter, battery board, and a control board. Also, current wireless sensor network is redesigned for power transfer system. The working flow of sensor network is modified to bottom-to-top to save power of sensor modules which are the power bottleneck of this sensor system. As a result, the system is able to support a sensor module continuously with received power of −14 dBmW, when the transmitting antenna is 30 dBmW at 10 meters distance.

scholarly journals Analysis and Optimization of Asymmetric Wireless Power Transfer in Concrete

2020 ◽  
Vol 2020 ◽  
pp. 1-12
Author(s):  
Zijian Tian ◽  
Dairong Liu ◽  
Wei Chen ◽  
Wenqing Wang ◽  
Shan Pan ◽  
...  
Keyword(s):  
Structural Health Monitoring ◽  
Health Monitoring ◽  
Power Supply ◽  
Monitoring Network ◽  
Wireless Power Transfer ◽  
Transmission Efficiency ◽  
Power Transfer ◽  
Wireless Power ◽  
Structural Health ◽  
The Relationship

With the rapid development of the Internet of things (IoT) technology, the application of IoT has been expanded greatly, and the disadvantages of the traditional battery power supply have become increasingly prominent. The power supply mode limits the development of the concrete structural health monitoring network. And the application of magnetic resonance coupled wireless power transfer technology can solve the problem of power supply to sensors embedded in concrete. The corrected transmission efficiency considering the concrete conductivity is proposed which establishes the relationship between the electromagnetic field and the circuit model. And the field-circuit coupled model of asymmetric wireless power transfer system in concrete is developed. The effects of radial offset and axial dislocation on the transmission efficiency at different concrete conductivity are further analyzed. The relationship between the resonant frequency and the transmission efficiency in different concrete conductivity is analyzed, and an optimization scheme is proposed to improve the transmission efficiency. Finally, the experimental setups are established, and the theoretical analysis is verified. The conclusions cannot only break through the bottleneck of the scale of the concrete structural health monitoring network but also further releases the application potential of IoT.

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