A cathode interface engineering approach for the comprehensive study of indoor performance enhancement in organic photovoltaics

2020 ◽  
Vol 4 (7) ◽  
pp. 3378-3387 ◽  
Author(s):  
Alfonsina Abat Amelenan Torimtubun ◽  
José G. Sánchez ◽  
Josep Pallarès ◽  
Lluis F. Marsal
Keyword(s):  
Energy Harvesting ◽  
Power Consumption ◽  
Low Power ◽  
Organic Photovoltaics ◽  
Performance Enhancement ◽  
Low Power Consumption ◽  
Interface Engineering ◽  
Engineering Approach ◽  
Comprehensive Study ◽  
Cathode Interface

Organic photovoltaics (OPVs) have a promising future in reliable energy harvesting to drive low power consumption devices for indoor applications.

Wireless Vibration Sensing Without a Battery

2012 ◽  
Author(s):  
Haiying Huang ◽  
Yayu Hew
Keyword(s):  
Energy Harvesting ◽  
Power Consumption ◽  
Low Power ◽  
Strain Gauge ◽  
Sensor Node ◽  
Wireless Sensor ◽  
Low Power Consumption ◽  
Wireless Sensor Node ◽  
Signal Modulation ◽  
Ultra Low Power

This paper presents the implementation and characterization of a low power wireless vibration sensor that can be powered by a flash light. The wireless system consists of two components, namely the wireless sensor node and the wireless interrogation unit. The wireless sensor node includes a wireless strain gauge that consumes around 6 mW, a signal modulation circuit, and a light energy harvesting unit. To achieve ultra-low power consumption, the signal modulation circuit was implemented using a voltage-controlled oscillator (VCO) to convert the strain gauge output to an intermediate frequency (IF) signal, which is then used to alter the impedance of the sensor antenna and thus achieves amplitude modulation of the backscattered antenna signal. A generic solar panel with energy harvesting circuit is used to power the strain sensor node continuously. The wireless interrogation unit transmits the interrogation signal and receives the amplitude modulated antenna backscattering, which can be down-converted to recover the IF signal. In order to measure the strains dynamically, a Phase Lock Loop (PLL) circuit was implemented at the interrogator to track the frequency of the IF signal and provide a signal that is directly proportional to the measured strain. The system features ultra-low power consumption, complete wireless sensing, solar powering, and portability. The application of this low power wireless strain system for vibration measurement is demonstrated and characterized.

scholarly journals Study of a Low-Power-Consumption Piezoelectric Energy Harvesting Circuit Based on Synchronized Switching Technology

Energies ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 3166
Author(s):  
Jianfeng Hong ◽  
Fu Chen ◽  
Ming He ◽  
Sheng Wang ◽  
Wenxiang Chen ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Theoretical Analysis ◽  
Power Consumption ◽  
Low Power ◽  
Impedance Matching ◽  
Maximum Energy ◽  
Low Power Consumption ◽  
Piezoelectric Energy Harvesting ◽  
Interface Circuit ◽  
Piezoelectric Energy

This paper presents a study of a piezoelectric energy harvesting circuit based on low-power-consumption synchronized switch technology. The proposed circuit includes a parallel synchronized switch harvesting on inductor interface circuit (P-SSHI) and a step-down DC-DC converter. The synchronized switch technology is applied to increase the conversion efficiency of the circuit. The DC-DC converter is used to accomplish the impedance matching for different loads. A low-power-consumption microcontroller and discrete components are used to build the P-SSHI interface circuit. The study starts with theoretical analysis and simulations of the P-SSHI interface circuit. Simulations and experiments were conducted to validate the theoretical analysis. The experimental results show that the maximum energy harvested by the system with a P-SSHI interface circuit is 231 μW, which is 2.89 times that of a system without the P-SSHI scheme. The power consumption of the P-SSHI interface circuit can be as low as 10.6 μW.

Enhanced Energy Harvesting from Piezoceramic Using Hybrid Stimulations

2016 ◽  
Vol 848 ◽  
pp. 205-209 ◽  
Author(s):  
Bin Zhang ◽  
Benjamin Ducharne ◽  
Jun Gao
Keyword(s):  
Energy Harvesting ◽  
Power Consumption ◽  
Low Power ◽  
Potential Method ◽  
Induced Polarization ◽  
Low Power Consumption ◽  
Current Amplifier ◽  
Sensor Applications ◽  
Stimulation Method ◽  
A Current

Energy harvesting from ambient environment vibration is a potential method to supply the low-power consumption devices. This paper demonstrates a new method to proceed energy harvesting using a piezoceramic. Both the mechanical and electrical excitations (hybrid stimulation) have been exerted on a piezoceramic. Current was measured though a current amplifier to calculate the induced polarization. By comparing the hybrid stimulation and the pure mechanical one, it can be found that the hybrid stimulation method enable to amplifier the harvested energy, which is promising to be used in energy harvesting and sensor applications.

Fabrication of spin torque devices by using quasi-antiferromagnetic materials

Impact ◽  
2020 ◽  
Vol 2020 (1) ◽  
pp. 79-81
Author(s):  
Hiromi Yuasa
Keyword(s):  
Energy Harvesting ◽  
Power Consumption ◽  
Low Power ◽  
Energy Efficient ◽  
Spin Current ◽  
Low Power Consumption ◽  
Spin Torque ◽  
Ultra Low Power ◽  
Magnetic Structures ◽  
Antiferromagnetic Materials

The devices we use on a day-to-day basis require a substantial amount of energy to power, but even more energy is left unused and goes to waste. What if our devices were (at least nearly) completely energy efficient? This would help pave the way towards a greener and more energy smart future. This concept is something one team of Japanese researchers is working on, by using quasi antiferromagnetic (AFM) materials which work successfully at the nanoscale. Professor Hiroma Yuasa is based at Kyushu University, Japan, where her laboratory is working on spintronics research. Currently, her focus includes spin current physics and spin torque in artificial magnetic structures, including the applications of these, such as in energy harvesting and ultra-low power consumption devices, which could help in achieving a greener future.

Magnetic energy harvesting with magnetoelectrics: an emerging technology for self-powered autonomous systems

2017 ◽  
Vol 1 (10) ◽  
pp. 2039-2052 ◽  
Author(s):  
Venkateswarlu Annapureddy ◽  
Haribabu Palneedi ◽  
Geon-Tae Hwang ◽  
Mahesh Peddigari ◽  
Dae-Yong Jeong ◽  
...  
Keyword(s):  
Energy Harvesting ◽  
Magnetic Fields ◽  
Power Consumption ◽  
Low Power ◽  
Magnetic Energy ◽  
Autonomous Systems ◽  
Emerging Technology ◽  
Low Power Consumption ◽  
Weak Magnetic Fields ◽  
Self Powered

Energy harvesting from the weak magnetic fields based on the magneto-mechano-electric (MME) effect is quite promising for powering the low power consumption electronics.

Optimal design of a high homogeneous and small-size shim coil for atomic spin gyroscope based on 0-1 linear programming

2020 ◽  
Vol 64 (1-4) ◽  
pp. 165-172
Author(s):  
Dongge Deng ◽  
Mingzhi Zhu ◽  
Qiang Shu ◽  
Baoxu Wang ◽  
Fei Yang
Keyword(s):  
Linear Programming ◽  
Power Consumption ◽  
Low Power ◽  
Optimization Design ◽  
Structural Parameters ◽  
Axial Position ◽  
Low Power Consumption ◽  
Optimal Method ◽  
Atomic Spin ◽  
Shim Coil

It is necessary to develop a high homogeneous, low power consumption, high frequency and small-size shim coil for high precision and low-cost atomic spin gyroscope (ASG). To provide the shim coil, a multi-objective optimization design method is proposed. All structural parameters including the wire diameter are optimized. In addition to the homogeneity, the size of optimized coil, especially the axial position and winding number, is restricted to develop the small-size shim coil with low power consumption. The 0-1 linear programming is adopted in the optimal model to conveniently describe winding distributions. The branch and bound algorithm is used to solve this model. Theoretical optimization results show that the homogeneity of the optimized shim coil is several orders of magnitudes better than the same-size solenoid. A simulation experiment is also conducted. Experimental results show that optimization results are verified, and power consumption of the optimized coil is about half of the solenoid when providing the same uniform magnetic field. This indicates that the proposed optimal method is feasible to develop shim coil for ASG.

An Ultra-low Power Consumption MAC Protocol Complied with IEEE 802.15.4/4e for Wireless Smart Utility Networks

2016 ◽  
Vol 136 (11) ◽  
pp. 1555-1566 ◽  
Author(s):  
Jun Fujiwara ◽  
Hiroshi Harada ◽  
Takuya Kawata ◽  
Kentaro Sakamoto ◽  
Sota Tsuchiya ◽  
...  
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Ieee 802.15.4 ◽  
Mac Protocol ◽  
Low Power Consumption ◽  
Ultra Low Power
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