Helmholtz resonance effect and Venturi effect combined noise reduction transduction device and method

Abstract

The invention provides a Helmholtz resonance effect and Venturi effect combined noise reduction transduction device and method, and belongs to the technical field of noise control and novel energy power generation. The noise reduction transduction device comprises a sound energy power generation noise reduction plate and a piezoelectric plate; a working unit composed of a Helmholtz resonator and a Venturi channel is arranged in the sound energy power generation noise reduction plate; the Helmholtz resonator is vertically arranged and comprises a Helmholtz resonant cavity and a neck part which are communicated with each other, and the top of the Helmholtz resonant cavity is sealed by the piezoelectric plate arranged on an opening in the top surface of the sound energy power generation noise reduction plate; the Venturi channel transversely penetrates through the front face and the back face of the sound energy power generation noise reduction plate and comprises an inlet section, a throat opening and an outlet section which are communicated, and the throat opening is communicated with the neck of the Helmholtz resonator. The Helmholtz resonance effect and the Venturi effect are combined in one device, noise and airflow in the environment can be collected at the same time, the energy conversion efficiency is improved, noise is turned into wealth while noise is reduced, and the noise is used for power generation.

Description

technical field [0001] The invention belongs to the technical field of noise control and new energy power generation, and specifically discloses a noise-reduction transduction device and a method combining Helmholtz resonance effect and Venturi effect. Background technique [0002] Human beings have used the energy on the earth to provide convenience for themselves for thousands of years. The use of wind energy, thermal energy and light energy has greatly facilitated the development of human life. However, in the 21st century, with the continuous development of human science and technology and the continuous growth of the world population, human demand for energy is increasing, and blindly using non-renewable energy is no longer a long-term solution. Despite extensive research into renewable energy harvesting technologies, there are still neglected and wasted sources of energy all around us, and one of them is sound energy, which is produced everywhere but rarely used. And ...

AI Technical Summary

Problems solved by technology

Despite extensive research on renewable energy harvesting technologies, there are still neglected and wasted sources of energy around us, and one of them is sound energy, which is produced everywhere but rarely utilized

And at present, people regard noise as a kind of harm and suppress it. The processing of noise only focuses on the suppression of noise, ignoring the possibility that noise can be used by human beings as a widespread energy.

Although this method can effectively isolate or reduce noise, the noise energy is converted into heat energy, resulting in a waste of resources.

[0003] With the rapid development of microelectronic devices and wireless sensor network technology, the scale of their use is increasing exponentially, but the energy supply problem for these devices has always limited their applications. At present, most small portable electronic devices and wireless sensors The energy supply in China has been mainly powered by batteries. Although the battery technology is mature and easy to use, the life of the battery is very short for these electronic devices, and the cost of replacing the battery is expensive in some occasions, even It is difficult to realize, and a large number of discarded batteries will cause long-term pollution to the surrounding environment. The defects of batteries hinder the development of small portable electronics and wireless sensors. Therefore, it is of great significance to study new energy supply technologies

This invention only uses the Helmholtz resonator to collect sound energy, and the collection efficiency is low. At the same time, the piezoelectric ceramic sheet is fixed on the Helmholtz resonator by adhesive method. This fixing method is unstable, easy to fall off, and not easy to Replacing the piezoceramics

[0007] Existing acoustic power generation devices basically use a single physical effect to convert energy, and do not integrate multiple physical effects into one device for energy conversion and noise suppression

Moreover, in the prior art, most of the piezoelectric sheets and piezoelectric cantilever beams are glued. This fixing method is greatly affected by human factors, resulting in large performance differences between individuals.

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