CN113984908A - Pressure wave generating device - Google Patents
Pressure wave generating device Download PDFInfo
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- CN113984908A CN113984908A CN202111278690.3A CN202111278690A CN113984908A CN 113984908 A CN113984908 A CN 113984908A CN 202111278690 A CN202111278690 A CN 202111278690A CN 113984908 A CN113984908 A CN 113984908A
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 32
- 238000006243 chemical reaction Methods 0.000 claims abstract description 5
- 238000012360 testing method Methods 0.000 abstract description 9
- 238000012423 maintenance Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 5
- 238000005259 measurement Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/34—Generating the ultrasonic, sonic or infrasonic waves, e.g. electronic circuits specially adapted therefor
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Abstract
The invention relates to a pressure wave generating device, which comprises an air compressor, wherein the output end of the air compressor is communicated with the input end of an electric control regulating valve through an air pipe, and the output end of the electric control regulating valve forms a pressure wave generating outlet; the pressure wave digital signal generator is electrically connected with the electric control regulating valve through the D/A conversion module; the air pipe is also communicated with a peak value regulating valve to regulate and limit the maximum value of the output pressure wave. Compared with the traditional pressure wave generating device, the invention adopts completely different working principles, namely, the digital signal of the pressure wave sent by the computer is converted into an analog signal by the D/A module, and the opening of the valve of the electric control regulating valve is controlled, so that the air compressor outputs the low-frequency pressure wave with higher sound pressure in a corresponding waveform through the high-speed airflow of the electric control regulating valve, has the advantages of smaller volume, low cost, convenient maintenance and use and the like, and can meet the noise reduction test of the current low-frequency noise reduction device in the atmospheric environment.
Description
Technical Field
The invention belongs to the technical field of acoustic research and application, and particularly relates to a pressure wave generating device.
Background
In acoustics research and application, pressure wave sensor is comparatively common, and pressure wave sensor generally need cooperate the noise reduction device to use, and the noise reduction device is used for reducing ambient noise in order to improve the accuracy that pressure wave sensor measured. If the noise reduction effect of the noise reduction device is poor, the measurement of the pressure wave sensor is interfered by noise, if the noise reduction effect of the noise reduction device is too strong, part of pressure waves to be measured can be filtered, the two conditions can directly influence the accuracy of the measurement of the pressure wave sensor, and therefore the noise reduction effect of the noise reduction device needs to be tested and taught in advance before use.
At present, the noise reduction effect of the noise reduction device is generally tested by depending on the pressure wave generating device, namely, the pressure wave generating device is controlled to send different sound pressures or frequencies to the noise reduction device in a closed space so as to simulate the real environment to be reduced in noise, so that the noise reduction effect of the noise reduction device is tested. However, limited by the size of the enclosed space, it is difficult to truly simulate the propagation of the low-frequency pressure wave in the atmosphere in the enclosed space, and the size of the low-frequency noise reduction device is often large, generally about 20 meters, so the simulation test for the low-frequency noise reduction device generally needs to be performed in the atmospheric environment to ensure the reliability of the test.
At present, pressure wave generating devices generally have two forms, namely a pressure wave generated by high-speed vibration of a mechanical driving film, and a pressure wave generated in a medium by high-speed reciprocating action of a piston, such as a pressure wave generator with a movable control rod for generating the pressure wave in the medium in Chinese patent CN 201280010533.7; the essence of both is that the corresponding pressure wave is emitted by controlling the vibration frequency, but the sound pressure of the low-frequency pressure wave generated by the two forms of pressure wave generating devices is smaller under the principle limitation; and under atmospheric environment, the less low frequency pressure wave's of acoustic pressure transmission is comparatively difficult, is difficult to satisfy the test demand, and the pressure wave generating device of above-mentioned two kinds of forms needs very big piston or very big film just can produce the low frequency pressure wave of higher acoustic pressure, but this can lead to pressure wave generating device's volume too huge, no matter be manufacturing cost and use the degree of difficulty all can increase, so need design a volume less and can produce the pressure wave generating device of higher acoustic pressure low frequency pressure wave and satisfy the test demand.
Disclosure of Invention
In view of the above disadvantages in the prior art, the present invention provides a pressure wave generator, which solves the problem that the existing pressure wave generator is difficult to generate high sound pressure low frequency pressure waves in a small volume, and has the advantages of low cost and convenient use.
In order to solve the technical problems, the invention adopts the following technical scheme:
a pressure wave generating device comprises an air compressor, wherein the output end of the air compressor is communicated with the input end of an electric control regulating valve through an air pipe, and the output end of the electric control regulating valve forms a pressure wave generating outlet;
the pressure wave generating device also comprises a pressure wave digital signal generator which is electrically connected with the electric control regulating valve through the D/A conversion module so as to control the on-off action of the electric control regulating valve.
Furthermore, a peak value regulating valve is communicated with the gas pipe section between the air compressor and the electric control regulating valve to regulate and limit the maximum value of the output pressure wave of the pressure wave emitting port.
Further, the air compressor has a cylinder volume of more than 300L to ensure a stable supply of air pressure.
Furthermore, the pressure wave digital signal generator adopts a computer or a singlechip.
Compared with the prior art, the invention has the following beneficial effects:
compared with the traditional pressure wave generating device, the invention adopts completely different working principles, namely, a digital signal of the pressure wave sent by the computer is converted into an analog signal by the D/A module, and the opening of the valve of the electric control regulating valve is controlled, so that the air compressor outputs the high-speed airflow in a corresponding waveform through the electric control regulating valve to generate the pressure wave; wherein, air compressor provides sufficient pressure source to can produce the low frequency pressure wave of higher acoustic pressure, can propagate long distance in atmospheric environment, and overall structure is simple, the volume is less, with low costs, it is all comparatively convenient to maintain and use, can satisfy the test of making an uproar of falling of present low frequency noise reduction device in atmospheric environment completely.
Drawings
FIG. 1 is a schematic view of a connection of a pressure wave generator according to an embodiment;
the device comprises an air compressor 1, an air pipe 2, a peak value regulating valve 3, an electronic control regulating valve 4, a pressure wave emitting port 5, a D/A conversion module 6 and a pressure wave digital signal generator 7.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Example (b):
referring to fig. 1, a pressure wave generator includes an air compressor 1, an output end of the air compressor 1 is communicated with one end of an electric control regulating valve 4 through an air pipe 2, and the other end of the electric control regulating valve 4 forms a pressure wave generating outlet 5;
the pressure wave generating device also comprises a pressure wave digital signal generator 7, and the pressure wave digital signal generator 7 is electrically connected with the electric control regulating valve 4 through the D/A conversion module 6.
In this embodiment, the air compressor 1 with a large cylinder and a large power of more than 300L is used to ensure that a stable air pressure can be supplied to the electric control regulating valve 4; the other end of the electric control regulating valve 4 can form a pressure wave emitting port 5 for outputting pressure waves by connecting an output joint required by the test; the pressure wave digital signal generator 7 can be set and output a pressure wave digital signal by using a computer and matching with an existing software program (such as labview software).
Compared with the traditional pressure wave generating device, the invention adopts completely different working principles, namely, a digital signal of the pressure wave sent by a computer is converted into an analog signal by a D/A module, and the opening of the valve of the electric control regulating valve 4 is controlled, so that the air compressor 1 outputs the high-speed airflow through the electric control regulating valve 4 in a corresponding waveform to generate the pressure wave; wherein, air compressor 1 provides sufficient pressure source to can produce the low frequency pressure wave of higher acoustic pressure, can propagate long distance in atmospheric environment, and overall structure is simple, the volume is less, with low costs, it is all comparatively convenient to maintain and use, can satisfy the test of making an uproar of falling of present low frequency noise reduction device in atmospheric environment completely.
Furthermore, the air pipe 2 is also communicated with a peak value regulating valve 3 to regulate and limit the maximum sound pressure of the output pressure wave of the pressure wave emitting port.
Thus, the maximum value of the air flow passing through the electric control regulating valve 4 is set through the peak value regulating valve 3, so that the damage to the noise reduction device caused by the abnormal overhigh air flow speed output by the air compressor 1 can be effectively avoided; meanwhile, the valve opening of the peak value adjusting valve 3 can be adjusted to enable the corresponding air flow to pass through a state lower than the flow of the air flow output by the air compressor 1, so that the air flow passing through the electric control adjusting valve 4 is always at a stable value, and the influence on the test accuracy of the noise reduction device when the air flow output by the air compressor 1 is unstable is avoided.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (4)
1. A pressure wave generating apparatus characterized by: the air compressor comprises an air compressor, wherein the output end of the air compressor is communicated with the input end of an electric control regulating valve through an air pipe, and the output end of the electric control regulating valve forms a pressure wave generating outlet;
the pressure wave generating device also comprises a pressure wave digital signal generator which is electrically connected with the electric control regulating valve through the D/A conversion module so as to control the on-off action of the electric control regulating valve.
2. A pressure wave generating apparatus according to claim 1, wherein: the air pipe section between the air compressor and the electric control regulating valve is also communicated with a peak value regulating valve to regulate and limit the maximum value of the output pressure wave of the pressure wave sending port.
3. A pressure wave generating apparatus according to claim 1, wherein: the air compressor has a cylinder volume of more than 300L to ensure stable supply of air pressure.
4. A pressure wave generating apparatus according to claim 1, wherein: the pressure wave digital signal generator adopts a computer or a singlechip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111278690.3A CN113984908A (en) | 2021-10-31 | 2021-10-31 | Pressure wave generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111278690.3A CN113984908A (en) | 2021-10-31 | 2021-10-31 | Pressure wave generating device |
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| Publication Number | Publication Date |
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| CN113984908A true CN113984908A (en) | 2022-01-28 |
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| CN202111278690.3A Pending CN113984908A (en) | 2021-10-31 | 2021-10-31 | Pressure wave generating device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499512A (en) * | 2013-09-23 | 2014-01-08 | 同济大学 | Air-pressure-adjustable performance testing device for air filtering material and application thereof |
| CN105281714A (en) * | 2015-11-10 | 2016-01-27 | 华东师范大学 | Square wave generating device and method capable of editing code element |
| CN107830412A (en) * | 2017-10-30 | 2018-03-23 | 重庆科技学院 | The incomplete blocking position detecting system of pipeline and detection method |
| CN113457958A (en) * | 2021-07-12 | 2021-10-01 | 重庆建安仪器有限责任公司 | Pressure wave generating device based on fan |
-
2021
- 2021-10-31 CN CN202111278690.3A patent/CN113984908A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103499512A (en) * | 2013-09-23 | 2014-01-08 | 同济大学 | Air-pressure-adjustable performance testing device for air filtering material and application thereof |
| CN105281714A (en) * | 2015-11-10 | 2016-01-27 | 华东师范大学 | Square wave generating device and method capable of editing code element |
| CN107830412A (en) * | 2017-10-30 | 2018-03-23 | 重庆科技学院 | The incomplete blocking position detecting system of pipeline and detection method |
| CN113457958A (en) * | 2021-07-12 | 2021-10-01 | 重庆建安仪器有限责任公司 | Pressure wave generating device based on fan |
Non-Patent Citations (4)
| Title |
|---|
| 张明作;韩赞东;史立军;王友军;闫兴璀;汪建平;党辉;王建;: "城市燃气管道带气作业自动控压方法" * |
| 王健;吴军基;陶钢;: "射流低频高声强发生器设计与实验研究" * |
| 谷嘉锦: "高声强声源及其应用" * |
| 陶继增;李程;李欣;: "一种新型正弦压力发生器" * |
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Application publication date: 20220128 |
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