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In this paper we theoretically and experimentally present a nonresonant vibration energy harvesting device based on the shear mode of 0.71Pb(Mg1/3Nb2/3)O3-0.29PbTiO3 single crystals. The electrical properties of the energy harvesting device were evaluated using an analytical method. Good consistency was obtained between the analytical and experimental results. Under a mass load of 200 g, a peak voltage...
We aim at using variable shape cantilever beam to improve the efficiency of energy harvesting from ambient vibration in wireless grid sensor applications. The cantilever beam is composed of an active layer composed of a piezoelectric material and a metallic layer (unimorph design). A tip mass attached to the free end of the cantilever beam is added to increase the inertial forces of the structure...
Relaxor-based ferroelectric Pb(Zn1/3Nb2/3)O3 -(6-7)%PbTiO3 single crystal of [110]Ltimes[001]T(P) cut exhibits high d31 and low s11E values, making it candidate for piezoelectric energy harvesting. In this work, a cantilever piezoelectric power generator using this crystal cut has been designed and fabricated. The device is designed for 110 Hz of resonance. The peak voltage generated from the prototype...
In piezoelectric energy harvesting (PEH), with the use of the nonlinear technique named synchronized switching harvesting on inductor (SSHI), the harvesting efficiency can be greatly enhanced. Furthermore, the introduction of its self-powered feature makes this technique more applicable for standalone systems. In this article, a modified circuitry and an improved analysis for self-powered SSHI are...
Interest for harvesting energy from the environment to sustain the operational lifetime of any battery-driven electronic device like wireless sensor nodes has been growing tremendously. One prominent challenge with energy harvesting sources is the deficiency in energy supply to continuously power the electronic devices even with the rapid advancement in ultra low power microelectronic technology....
The paper presents a power conditioning circuit (PCC) for an autonomous low power system in package (SiP) based on harvesting energy from vibrations. This self-powered system would be placed in indoor environments. The electromechanical transduction is performed using a low-cost commercial piezoelectric product, working at low frequencies and with voltages up to 2.5 V. The final designed IC has been...
This paper proposes a comparative analysis to clarify the functions of piezoelectric energy harvesting, dissipation and their effects on structural damping. Energy flow in piezoelectric devices is discussed. Based on the equivalent circuit, the damping effects resulted from energy harvesting in the application of standard energy harvesting and energy dissipation in the application of resistive shunt...
Numerous industrial and military applications require remote sensing of various machine and equipment operating parameters in locations where traditional power sources may not be available and long periods of unattended operation are required. Quite often, however, some source of vibrating energy may be present in operation of the machine in question. Herein, a piezoelectric source is efficiently...
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