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Generator collecting acoustic energy and sound sensor

A sound sensor and sound energy technology, applied in the direction of sensors, friction generators, sensor components, etc., can solve the problems of limited application range, inconvenient use of sensors, etc., and achieve the effect of reducing sound energy loss and improving sound energy utilization efficiency

Active Publication Date: 2015-08-12
BEIJING INST OF NANOENERGY & NANOSYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the power supply problem of the acoustic sensor, the existing technology is to provide an external power supply for the acoustic sensor, which not only makes the use of the sensor inconvenient, but also limits the application range

Method used

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  • Generator collecting acoustic energy and sound sensor
  • Generator collecting acoustic energy and sound sensor
  • Generator collecting acoustic energy and sound sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The generator of collecting sound energy of the present embodiment, see figure 1 , comprising a Helmholtz resonant cavity and a triboelectric nano-power generation component, wherein the Helmholtz resonant cavity has an opening 105, and the triboelectric nano-power generation component is a part of the outer wall 104 of the Helmholtz resonant cavity. The triboelectric nano-power generation component includes two thin films facing each other, see figure 1, the edge of the triboelectric nano-power generation component is fixed on the outer wall of the Helmholtz resonant cavity, including the first electrode layer 101, the second electrode layer 103 and the friction layer 102, wherein the inner surface of the first electrode layer 101 and the upper surface of the friction layer 102 Set face to face, the lower surface of the friction layer 102 is in contact with the second electrode layer 103; the first electrode layer 101 is an elastic material, or the whole formed by the ...

Embodiment 2

[0058] The generator of collecting sound energy of the present embodiment, see figure 2, including a Helmholtz resonant cavity and two triboelectric nano-power generating parts, wherein the Helmholtz resonant cavity has an opening 105, and the two triboelectric nano-power generating parts are part of the outer wall 104 of the Helmholtz resonant cavity, preferably, two triboelectric nano-power generating parts The power generating components are arranged on the outer walls of the two sides of the opening 105 and face to face, for example figure 2 The opening of the middle Helmholtz resonant cavity is set on the outer wall on the right side, and the two triboelectric nanometer power generation components are symmetrically set on the upper and lower outer walls of the Helmholtz resonant cavity. Same as the first embodiment, the width W, height H, opening diameter D and outer wall thickness h of the Helmholtz resonant cavity jointly determine the frequency of the response sound ...

Embodiment 3

[0062] The generator of collecting sound energy of the present embodiment, see image 3 , comprising a Helmholtz resonant cavity and a triboelectric nano-power generating component, wherein the Helmholtz resonant cavity has an opening 105, and the triboelectric nano-generating component is arranged at the opening of the Helmholtz resonant cavity. The width W, height H, opening diameter D and wall thickness h of the Helmholtz resonant cavity jointly determine the frequency of the response sound wave. The structure of the triboelectric nanometer power generation part is basically the same as that of the triboelectric nanometer power generation part in Embodiment 1. The difference is that only one end of the first electrode layer, the friction layer and the second electrode layer is fixed on the outer wall of the opening 105. The free end corresponding to the fixed end makes the triboelectric nano power generation component form a generator with a cantilever arm structure. The f...

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Abstract

The invention provides a generator capable of collecting acoustic energy, which combines a Helmholtz acoustic resonance cavity and a triboelectric nanometer generating component. The triboelectric nanometer generating component with thin membrane structures is arranged on the outer wall or at the opening position of the Helmholtz acoustic resonance cavity. Sound passes through the acoustic resonance cavity to allow an electrode layer and a frictional layer of the triboelectric nanometer generating component to mutually contact and separate and to generate electric energy on two electrode layers. The generator does not need to be provided with a vibrating membrane, and can reduce unnecessary acoustic energy loss, and efficiently convert sound energy into electric energy; the generate can be used as a sound sensor which does not need a power supply, and is a self-driven passive sound sensor.

Description

technical field [0001] The invention relates to a generator, in particular to a generator for collecting sound energy, and a sound sensor using the generator. Background technique [0002] Acoustic sensors are energy conversion devices that convert sound signals into electrical signals. At present, they mainly include: electric type (moving coil type, aluminum belt type), condenser microphone type (DC polarization type), piezoelectric type (crystal type, ceramic type) ), and electromagnetic type, carbon particle type, semiconductor type, etc. The currently widely used electret / capacitive sensors have the characteristics of wide frequency range, high sensitivity, and low distortion, but still must rely on DC power supply for impedance transformation, that is, an external power supply is required to ensure its excellent performance. Other existing acoustic sensors also require the drive of an external power source to work. In order to solve the power supply problem of the ac...

Claims

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Application Information

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IPC IPC(8): H02N1/04H04R1/00
Inventor 王中林杨进陈俊
Owner BEIJING INST OF NANOENERGY & NANOSYST
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