scholarly journals Hybrid Printed Energy Harvesting Technology for Self-Sustainable Autonomous Sensor Application

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 728 ◽  
Author(s):  
Sangkil Kim ◽  
Manos Tentzeris ◽  
Apostolos Georgiadis
Keyword(s):  
Energy Harvesting ◽  
Sensor System ◽  
Field Energy ◽  
Far Field ◽  
Wireless Power ◽  
Sensor Application ◽  
Energy Harvesters ◽  
Autonomous Sensor ◽  
Electromagnetic Power ◽  
Autonomous Sensors

In this paper, the far-field energy harvesting system for self-sustainable wireless autonomous sensor application is presented. The proposed autonomous sensor system consists of a wireless power supplier (active antenna) and far-field energy harvesting technology-enabled autonomous battery-less sensors. The wireless power supplier converts solar power to electromagnetic power in order to transfer power to multiple autonomous sensors wirelessly. The autonomous sensors have far-field energy harvesters which convert transmitted RF power to voltage regulated DC power to power-on the sensor system. The hybrid printing technology was chosen to build the autonomous sensors and the wireless power suppliers. Two popular hybrid electronics technologies (direct nano-particle printing and indirect copper thin film printing techniques) are discussed in detail.

scholarly journals Serial Switch Only Rectifier as a Power Conditioning Circuit for Electric Field Energy Harvesting

Energies ◽  
2020 ◽  
Vol 13 (20) ◽  
pp. 5279
Author(s):  
Oswaldo Menéndez ◽  
Loreto Romero ◽  
Fernando Auat Cheein
Keyword(s):  
Energy Harvesting ◽  
Electric Field ◽  
Power Systems ◽  
Power Management ◽  
Low Voltage ◽  
Experimental Tests ◽  
Field Energy ◽  
Energy Harvesters ◽  
Experimental Findings ◽  
Conditioning Circuit

Because traditional electronics cannot directly use the alternating output voltage and current provided by electric field energy harvesters, harvesting systems require additional regulating and conditioning circuits. In this field, this work presents a conditioning circuit, called serial switch-only rectifier (SSOR) for low-voltage electric field energy harvesting (EFEH) applications. The proposed approach consists of a tubular topology harvester mounted on the outer jacket of a 230 V three-wires electrical cable (neutral, ground, and phase), in which terminals are connected to SSOR. We compare SSOR performance with classic electronic approaches, such as a full-bridge rectifier and voltage doubler. Experimental findings showed that the gathered energy by a 1 m cylindrical harvester increased in approximately 73.3% using the SSOR as a power management circuit. Experimental findings showed that the gathered energy by a 1 m cylindrical harvester increase in approximately 73.3% using the SSOR as a power management circuit. This increase is principally due to the fact that a serial bidirectional switch disconnects the harvester from the rest of the management circuit, enhancing the charge collection process. Although simulated results disclosed that SSOR increased collected energy for smaller-scale harvesters (experimental tests obtained using a 10 cm cylindrical harvester), additional losses in bidirectional switch reduced its performance. In addition, we introduce a comprehensive analysis of EFEH systems based on SSOR according to the mains frequency for future power systems.

Optimization of an Electromagnetic Energy Harvesting Backpack Under Actual Walking and Running Scenarios

2016 ◽  
Author(s):  
Christopher Mullen ◽  
Soobum Lee
Keyword(s):  
Energy Harvesting ◽  
Copper Wire ◽  
Human Motion ◽  
Electromagnetic Energy ◽  
Human Gait ◽  
Energy Harvesters ◽  
Portable Power ◽  
Electromagnetic Power ◽  
Power Maximization ◽  
Electromagnetic Energy Harvesting

Energy harvesting technology can provide a renewable, portable power source for soldiers who rely solely on battery power in the field. Electromagnetic energy harvesters scavenge energy from wasted kinematic and vibration energy in human motion. The motion of interest in this paper is vertical hip displacement during human gait that acts as a base excitation. The placement of a permanent magnet based linear generator mounted in a backpack can make use of this excitation that results in relative motion of the magnet to the coil of copper wire, which induces an electric current. This current can be used to charge a battery or capacitor bank installed on the backpack to power portable electronic devices, thereby reducing the need for extra batteries and overall battery weight. The purpose of this research is to use a multi-variable optimization algorithm to identify an optimal coil and magnet layout for power maximization. Results from this study will pave the way for a more efficient energy harvesting backpack while providing better insight into the efficiency of magnet and coil layout for various applications for electromagnetic power generation from vibration.

scholarly journals An Efficient Far-Field Wireless Power Transfer via Field Intensity Shaping Techniques

Electronics ◽  
2021 ◽  
Vol 10 (14) ◽  
pp. 1609
Author(s):  
Martina T. Bevacqua ◽  
Gennaro G. Bellizzi ◽  
Massimo Merenda
Keyword(s):  
Antenna Array ◽  
Field Energy ◽  
Far Field ◽  
Power Transfer ◽  
Proof Of Concept ◽  
Wireless Power ◽  
Efficient Communication ◽  
Energy Replenishment ◽  
Radiative Power ◽  
Multiple Devices

Radiative (or far-field) energy replenishment for devices such as smartphones, laptops, robots, and small electric appliances paves the way to autonomous and continuous devices functioning, thus bypassing the need of operation interruptions, human maintenance activities, and replenishment by wired transformers. In this work, we investigate the feasibility of using a properly engineered antenna array able to deliver radiative power to devices in need of energy replenishment during their normal and unsupervised activity, whose locations are unknown. Both the case of single and multiple devices needing energy replenishment are addressed. A quantitative proof-of-concept study is carried out to validate the proposed approach. A 3D scenario is simulated to study the case of devices in need of energy replenishment within a standard office environment. Different antenna array configurations are investigated and the corresponding performances benchmarked against a standard installation of recharging antennas. Results confirm the outstanding capability of the proposed approach in terms of confinement and maximization of power transfer. Finally, in this framework, we also propose an efficient communication protocol that is able to manage multiple recharge demand given different operational rules.

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