A dual-cavity coupled noise generator and power generation method

A coupling type and generator technology, applied in the direction of generator/motor, piezoelectric effect/electrostrictive or magnetostrictive motor, electrical components, etc., can solve the negative effects of electromagnetic field on human body, large volume of sound wave power generation equipment, Problems such as difficulties in practical application, to achieve the effect of large application value, increased voltage, and increased vibration amplitude

Active Publication Date: 2021-07-02
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the currently known devices that use sound waves to generate electricity use traditional electromagnetic induction to achieve sound energy generation, resulting in the problem of electromagnetic pollution and the negative effects of electromagnetic fields that are harmful to the human body, and most of the sound wave power generation devices are relatively large in size. Practical application brings difficulties

Method used

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  • A dual-cavity coupled noise generator and power generation method
  • A dual-cavity coupled noise generator and power generation method
  • A dual-cavity coupled noise generator and power generation method

Examples

Experimental program
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Effect test

Embodiment 1

[0047] In this embodiment, the Helmholtz resonators 1 are arranged in series in a 4*4 array, and the closed resonant cavity 11 of the Helmholtz resonator 1 has an open top wall with a wall thickness of h 1 =6mm, the top wall of one closed resonant cavity 11 has a radius R 1 The small hole, the top wall of another closed resonant cavity 11 is opened with a radius R 2 large hole. For a bottom wall without openings, the wall thickness h 2 = 4 mm. The side wall between the two chambers, wall thickness h m =0.1mm, made of aluminum. Both the front panel and the rear panel used to form the closed cavity have a thickness of 1 mm. The cavity volumes of the two coupled closed resonant cavities 11 are the same, and both can be of length a 1 = 20mm, width a 2 =22mm, height a 3 = 20mm.

[0048] The electrode sheet 22 of this embodiment is also an aluminum rectangular sheet with a length of 20 mm, a width of 22 mm, a height of 20 mm, and a thickness of 0.1 mm. The piezoelectric ce...

Embodiment 2

[0052] In this embodiment, the top wall of the opening of the Helmholtz cavity 1 has a wall thickness h 1 =6mm, the top wall of one closed resonant cavity 11 has a radius R 1 The small hole, the top wall of another closed resonant cavity 11 is opened with a radius R 2 large hole. For a bottom wall without openings, the wall thickness h 2 = 4 mm. The side wall between the two chambers, wall thickness h m =0.1mm, made of aluminum. Both the front panel and the rear panel used to form the closed cavity have a thickness of 1 mm. The cavity volumes of the two coupled closed resonant cavities 11 are the same, and both can be of length a 1 = 20mm, width a 2 =22mm, height a 3 = 20mm.

[0053] The electrode sheet 22 of this embodiment is also a copper rectangular sheet with a length of 20 mm, a width of 22 mm, a height of 20 mm, and a thickness of 0.1 mm. The piezoelectric ceramic sheet 21 is a circular piezoelectric ceramic sheet 21 with a radius of 9 mm and a thickness of 0....

Embodiment 3

[0058] In the present embodiment, the thickness of extension neck 4 is a thin circular tube of 0.1 mm, and the diameters are R 1 = 1.2mm, R 2 =1.9mm, the lengths of the extension neck 4 in the cavity are L respectively 1 = 0 mm, L 2 = 9 mm.

[0059] Others are all the same as in Example 1.

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Abstract

The invention relates to a double-cavity coupled noise generator and a power generation method, which includes at least one Helmholtz resonant cavity, a piezoelectric unit, an extension neck, and an AC / DC conversion circuit; the piezoelectric unit is arranged in the Helmholtz On the side wall of the inner cavity of the resonant cavity; the Helmholtz resonant cavity includes at least two parallel closed resonant cavities, and the extension neck is arranged inside the resonant cavity, and one end extends to the top wall of the resonant cavity; AC and DC In the conversion circuit, the positive and negative poles of the piezoelectric unit are connected to the positive and negative poles of the piezoelectric unit through wires to output the voltage generated by the piezoelectric unit. The sound pressure phase can be completely opposite, so that the piezoelectric ceramic sheet connected to the electrode sheet on the side wall between the two chambers is affected by the push-pull force, and the vibration amplitude is greatly increased, realizing the high-voltage output of the acoustic wave generator.

Description

technical field [0001] The invention belongs to the technical field of noise reduction and environmental protection new energy, and in particular relates to a double-cavity coupling noise generator and a power generation method. Background technique [0002] With the depletion of traditional petrochemical resources and the continuous development of new clean energy, how to collect the sound energy in the environment and convert it into clean energy that people can use has become a hot spot of research by many scholars at home and abroad. If the sound energy in the environment The noise is collected and converted into electrical energy, which can not only effectively reduce environmental noise, but also provide power for electrical devices, such as street lights, and reduce the pressure of lack of electrical energy. The harm of noise to people: when it is 80-85 decibels, it is manifested as headache and poor sleep; when it is 90-100 decibels, it is emotional and fatigued; Oc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/18
CPCH02N2/188H02N2/181
Inventor 张小凤孙琳张光斌
Owner SHAANXI NORMAL UNIV
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