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High-Q value phononic crystal resonator-type acoustic energy harvester

A phononic crystal and resonant cavity technology, which is applied in the field of high-Q phononic crystal resonant cavity type acoustic energy collectors, achieves high-efficiency acoustic energy collection efficiency, less use of structural materials, and enhanced acoustic wave amplification and acoustic energy convergence capabilities

Inactive Publication Date: 2017-02-15
STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST +1
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Problems solved by technology

[0005] The object of the present invention is, aiming at the problems existing in the collection efficiency of the existing acoustic energy collector, the present invention proposes a high-Q value phononic crystal resonant cavity type acoustic energy collector

Method used

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  • High-Q value phononic crystal resonator-type acoustic energy harvester
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  • High-Q value phononic crystal resonator-type acoustic energy harvester

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Embodiment Construction

[0023] The specific embodiment of the present invention is as figure 1 shown.

[0024] In this embodiment, a high-Q phononic crystal resonator-type acoustic energy harvester includes a high-Q phononic crystal resonator 1 , an electromechanical Helmholtz resonator, a support column 4 and a base 5 .

[0025] The high-Q phononic crystal resonator 1 is formed by arraying 8 sets of cross vertical plates (1-1, 1-2, ..., 1-8) at equal intervals along two directions perpendicular to each other in the same plane, and the Its bottom is glued on the base 5, and a cavity is left in the center of the cross riser array to form a resonant cavity. The electromechanical Helmholtz resonator is composed of a Helmholtz resonator 2 and a composite piezoelectric transducer 3, and the composite piezoelectric transducer 3 is bonded to the back of the Helmholtz resonator 2 in a fixed manner at the peripheral end. cavity position; wherein the composite piezoelectric transducer 3 is formed by bonding ...

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Abstract

The invention discloses a high-Q value phononic crystal resonator-type acoustic energy harvester, which comprises a high-Q value phononic crystal resonator (1), an electromechanical Helmholtz resonator, a supporting column (4) and a base (5), wherein eight sets of cross plates are equidistantly arrayed in two mutually-vertical directions in the same plane to form the high-Q value phononic crystal resonator, and the bottom part is adhesive to the base; the cavity left in the center of the cross plate array forms a resonator; the electromechanical Helmholtz resonator formed by a composite piezoelectric transducer (3) and a Helmholtz resonator (2) is arranged in the center of the high-Q value phononic crystal resonator and is fixed on the base via the supporting column. Incident acoustic waves are subjected to double convergence amplification of the phononic crystal resonator and the electromechanical Helmholtz resonator, and the amplified acoustic pressure drives the composite piezoelectric transducer on the back of the electromechanical Helmholtz resonator to vibrate, the composite piezoelectric transducer generates deformation and outputs electric signals under piezoelectric effects, and the acoustic-electric conversion is thus realized.

Description

technical field [0001] The invention relates to a high-Q value phonon crystal resonant cavity type acoustic energy collector, which belongs to the technical field of acoustic energy. Background technique [0002] With the rise of the "Internet of Things" and the vigorous development of microelectronic device technology, the power supply of wireless sensor nodes in wireless sensor networks has become a research hotspot and difficulty. The power supply of wireless sensors is generally traditional batteries, but traditional batteries need to be replaced periodically due to limited power, especially for sensors working in complex and harsh environments, battery replacement is too troublesome and wastes manpower, material and financial resources, seriously affecting wireless Sensor network longevity and suitability for the environment. In order to solve this problem, research attention focuses on super-large battery and environmental energy harvesting technology. At present, th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02N2/18
CPCH02N2/188
Inventor 杨爱超朱亮俞林刚李敏吴宇
Owner STATE GRID JIANGXI ELECTRIC POWER CO LTD RES INST
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