Journal ArticleDOI
Vibration energy harvesting system for railroad safety based on running vehicles
TLDR
In this article, a new method is proposed to harvest energy based on the piezoelectric effect for track vibration in order to provide power for the wireless sensors which monitor railroad health.Abstract:
This research is focused on energy harvesting from track vibration in order to provide power for the wireless sensors which monitor railroad health. Considering that track vibration has vibration energy, a new method is proposed in the paper to harvest energy based on the piezoelectric effect. The piezoelectric generator called drum transducer is the key part for track vibration energy harvesting. The model of drum transducer is established and the simulation results show that it can generate 100 mW in real track situation. In addition, an experiment rig is developed and its vibration model is also established. The simulation and experiment results show that peak open-circuit voltage of piezoelectric generator is about 50–70 V at the full load of the train. The whole track vibration energy harvesting system is analytically modeled, numerically simulated, and experimentally realized to demonstrate the feasibility and the reliability of the theoretical model. This paper is the theoretical basis of harvesting, recovering and recycling of the track vibration energy for track safety.read more
Citations
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Journal ArticleDOI
High-Performance Piezoelectric Energy Harvesters and Their Applications
TL;DR: A comprehensive review of piezoelectric energy-harvesting techniques developed in the last decade is presented, identifying four promising applications: shoes, pacemakers, tire pressure monitoring systems, and bridge and building monitoring.
Journal ArticleDOI
A comprehensive review on vibration energy harvesting: Modelling and realization
Chongfeng Wei,Xingjian Jing +1 more
Abstract: This paper presents a state-of-the-art review on a hot topic in the literature, i.e., vibration based energy harvesting techniques, including theory, modelling methods and the realizations of the piezoelectric, electromagnetic and electrostatic approaches. To minimize the requirement of external power source and maintenance for electric devices such as wireless sensor networks, the energy harvesting technique based on vibrations has been a dynamic field of studying interest over past years. One important limitation of existing energy harvesting techniques is that the power output performance is seriously subject to the resonant frequencies of ambient vibrations, which are often random and broadband. To solve this problem, researchers have concentrated on developing efficient energy harvesters by adopting new materials and optimising the harvesting devices. Particularly, among these approaches, different types of energy harvesters have been designed with consideration of nonlinear characteristics so that the frequency bandwidth for effective energy harvesting of energy harvesters can be broadened. This paper reviews three main and important vibration-to-electricity conversion mechanisms, their design theory or methods and potential applications in the literature. As one of important factors to estimate the power output performance, the energy conversion efficiency of different conversion mechanisms is also summarised. Finally, the challenging issues based on the existing methods and future requirement of energy harvesting are discussed.
Journal ArticleDOI
A portable high-efficiency electromagnetic energy harvesting system using supercapacitors for renewable energy applications in railroads
TL;DR: In this paper, a portable high-efficiency electromagnetic energy harvesting system with supercapacitors that converts the energy of track vibrations into electricity is developed, which can be used in remote areas for safety facilities or in standby power supplies for rail-side equipment.
Journal ArticleDOI
Experimental investigation of non-linear multi-stable electromagnetic-induction energy harvesting mechanism by magnetic levitation oscillation
TL;DR: In this article, the authors presented a multi-stable electromagnetic-induction energy harvesting (MEH) system by magnetic levitation oscillation, which has a nonlinear restoring force and a multiwell restoring force potential, offering an improvement upon their linear counterparts by broadening its frequency response.
Journal ArticleDOI
Modeling on energy harvesting from a railway system using piezoelectric transducers
TL;DR: Theoretical models of piezoelectric energy harvesting from railway systems using patch-type and stack-type transducers are studied in this article, which can serve as power sources for distributed wireless sensor networks in remote areas.
References
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Journal ArticleDOI
Fundamentals of vehicle–track coupled dynamics
TL;DR: In this article, a three-dimensional vehicle-track coupled dynamics model is developed in which a typical railway passenger vehicle is modelled as a 35-degree-of-freedom multi-body system.
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Energy Harvesting for Autonomous Wireless Sensor Networks
TL;DR: The typical power requirements of some current portable devices, including a body sensor network, are shown in Figure 1.
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Energy Harvesting from Highly Unsteady Fluid Flows using Piezoelectric Materials
TL;DR: In this article, the authors explore some aspects of energy harvesting from unsteady, turbulent fluid flow using piezoelectric generators, where the authors use a three-way coupled interaction simulation that takes into account the aerodynamics, structural vibration, and electrical response of the generator.
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On low-frequency electric power generation with PZT ceramics
TL;DR: In this article, a theoretical analysis of piezoelectric power generation is presented where electrical energy is generated inside a prototype Total Knee Replacement (TKR) implant, which is verified with simulation and experimental results, including parameter identification, load matching, form factors, efficiency, longevity, energy conversion and energy storage.
Journal ArticleDOI
Design and performance of a centimetre-scale shrouded wind turbine for energy harvesting
TL;DR: In this paper, a miniature shrouded wind turbine aimed at energy harvesting for power delivery to wireless sensors in pipes and ducts is presented, which has a rotor diameter of 2.2 cm with an outer diameter of 3.2cm and generates electrical power by means of an axial-flux permanent magnet machine built into the shroud.