CN208821089U - It is a kind of for detecting the U-shaped amplifier tube of sound wave - Google Patents
It is a kind of for detecting the U-shaped amplifier tube of sound wave Download PDFInfo
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- CN208821089U CN208821089U CN201820642424.1U CN201820642424U CN208821089U CN 208821089 U CN208821089 U CN 208821089U CN 201820642424 U CN201820642424 U CN 201820642424U CN 208821089 U CN208821089 U CN 208821089U
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- sound
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- diaphragm
- quick diaphragm
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Abstract
For detecting the U-shaped amplifier tube of sound wave, two caliber sizes of U-tube are different the utility model discloses a kind of, and are fitted closely with the quick diaphragm of the sound to match with two bores (fep film) with two bores, make in U-tube for confined space.The surface of the quick diaphragm of two sound is arc-shaped, is used for coupled acoustic wave.The utility model is used for the sensors such as optical fiber microphone, the detectivity of sensor can be effectively improved, effectively solves the problems, such as that faint acoustic signals are difficult to detect.The utility model structure is simple simultaneously, easy to operate, good economy performance, and practical value is high.
Description
Technical field
The utility model relates to a kind of for detecting the U-shaped amplifier tube of sound wave, be particularly applied to the detection of faint sound wave.
Background technique
Conventional condenser microphone and optical fiber Mike it is rich it is general perceive sound using the quick diaphragm of sound, the quick diaphragm of sound is one kind
With excellent resilient properties, the film of sound can be preferably coupled, is generally made of perfluoroethylene-propylene (FEP) material.It is existing
Microphone sound wave is directly generally perceived using the quick diaphragm of a piece of sound, the ability for perceiving faint acoustic vibration is weak, therefore with such
Sensor made by the quick diaphragm of sound is difficult to detect faint acoustic signals.
Summary of the invention
In order to overcome the deficiency of existing microphone, especially optical fiber microphone in terms of detecting faint sound wave, this is practical new
Type provides a kind of U-shaped amplifier tube, which can increase the center amplitude of the quick diaphragm of sound, improves the spy of optical fiber microphone
Survey performance.
The technical scheme adopted by the utility model to solve the technical problem is as follows: two nozzles of U-shaped amplifier tube are using different
Bore, one it is big one dawn.It chooses the quick diaphragm of sound to match with two bores to fit at two bores, it should be ensured that fitting is close, makes
Obtaining is sealing state inside U type pipe.With the quick diaphragm of big bugle call close at sound wave to be measured, the quick diaphragm of trumpet sound by connector or
Ring flange is connected with microphone, serves as the sensing head of microphone.When sound source generates sound wave, sound wave causes the quick diaphragm of big bugle call
Vibration, the vibration are transmitted to the small size bore end of U-tube by the air dielectric in U-tube, caused in the quick diaphragm of trumpet sound
Biggish vibration is generated at the heart, has been reached the quick diaphragm excursion of amplification sound, has been changed the purpose of direction of wave travel.In noenergy loss
Under ideal conditions, the ratio between the quick diaphragm of trumpet sound and the quick center amplitude of big bugle call are equal to the inverse ratio of corresponding diaphragm radius squared,
It larger can improve the center amplitude of small size diaphragm.The quick diaphragm specification of specification and the common sound of microphone of the quick diaphragm of trumpet sound is kept
Unanimously.
The beneficial effects of the utility model are: improving wheat in the case where not changing microphone sensor package size
The ability of gram wind sensor detection low frequency, faint acoustic signals.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the quick diaphragm schematic diagram of sound of the utility model.
Fig. 3 is the structural map of a specific embodiment
In figure: 1, big bugle call quick diaphragm, 2, the quick diaphragm of trumpet sound, 3, U-tube aluminium alloy wall, 4, sound source, 5, reflective
Optical fiber microphone probe, 6, reflector plate.
Specific embodiment
In Fig. 1, the big quick diaphragm of bugle call (1) is used to perceive the sound wave of sound source sending, and sound wave causes the quick diaphragm of sound (1) to shake
Dynamic, the vibromotive force on the quick diaphragm of sound (1) must cause the vibration of U-tube aluminium alloy wall (3) interior air column.Air-column vibration it
Afterwards, and then cause the vibration of the quick diaphragm of trumpet sound (2).By using this structure, in an ideal case, if the quick film of trumpet sound
Piece (2) and the quick diaphragm of big bugle call (1) radius ratio are 1:2, then: the quick diaphragm of trumpet sound (2) and the quick diaphragm of big bugle call (1) center amplitude
Ratio is 4:1, that is to say, that realizes 4 times of amplifications of the quick center amplitude of sound.
The surface of the quick diaphragm of big bugle call (1) is arc surface, using the reason of this structure be arc structure relative to
Planar structure is more stable, avoids generating subsidiary vibration on diaphragm and then distorted signals occurs；The radius of the big quick diaphragm of bugle call (1)
It is 4mm, using the quick diaphragm of the sound of small dimension is guaranteed in the lower situation of acoustic wave energy with a thickness of 0.01mm, the quick diaphragm of sound
Center have certain mechanical oscillation.The big quick diaphragm of bugle call (1) its with material be perfluoroethylene-propylene (FEP).
The contour structures of the quick diaphragm of the trumpet sound (2) and the quick diaphragm of big bugle call (1) unanimously, radius 2mm, thickness
It is perfluoroethylene-propylene (FEP) with material for 0.01mm.
Mechanical oscillation of the U-tube (2) for medium in conducting tube avoid external interference sound wave or other factors
It influences.Two bores of U-tube (3) match with the quick diaphragm of two sound, and the internal diameter of large size round mouth is 7.8mm, outer diameter 8.8mm, small
The internal diameter of number round mouth is 3.8mm, outer diameter 4.8mm.U-tube (3) is aluminium alloy with material with a thickness of 1mm.
In the embodiment shown in fig. 3, sound source (4) issues sound wave, the big mouth that sound wave passes through air borne to U-shaped amplifier tube
At diameter, the quick diaphragm of big bugle call (1) is caused to vibrate, and then causes the vibration of U-tube aluminium alloy wall (3) interior air column, it should
Vibration drives the vibration of the quick diaphragm of trumpet sound (2).In specific application, inside is posted to the quick film of trumpet sound of reflector plate (6)
Piece (2) is used as the component part of fiber optic microphone probe (5), which can detect the vibration of the quick diaphragm of sound,
And it is eventually converted into electric signal.The detectivity of optical fiber microphone is effectively increased by U-shaped amplifier tube.
Claims (2)
1. a kind of for detecting the U-shaped amplifier tube of sound wave, it is characterized in that: the different U-tube of two bores is by perfluoroethylene-propylene material
The quick diaphragm of sound made of expecting is connected；Two caliber sizes of U-tube are different, and with the quick diaphragm of the sound to match with two bores with
Two bores fit closely；U-shaped amplifier tube is submicron structure.
2. it is according to claim 1 a kind of for detecting the U-shaped amplifier tube of sound wave, it is characterized in that: the table of the quick diaphragm of two sound
Face is arc-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820642424.1U CN208821089U (en) | 2018-05-02 | 2018-05-02 | It is a kind of for detecting the U-shaped amplifier tube of sound wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820642424.1U CN208821089U (en) | 2018-05-02 | 2018-05-02 | It is a kind of for detecting the U-shaped amplifier tube of sound wave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208821089U true CN208821089U (en) | 2019-05-03 |
Family
ID=66268604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820642424.1U Expired - Fee Related CN208821089U (en) | 2018-05-02 | 2018-05-02 | It is a kind of for detecting the U-shaped amplifier tube of sound wave |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208821089U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114593811A (en) * | 2022-02-28 | 2022-06-07 | 浙江大学 | Low-pass filtering fiber grating hydrophone adopting cymbal-shaped diaphragm |
-
2018
- 2018-05-02 CN CN201820642424.1U patent/CN208821089U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114593811A (en) * | 2022-02-28 | 2022-06-07 | 浙江大学 | Low-pass filtering fiber grating hydrophone adopting cymbal-shaped diaphragm |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190503 Termination date: 20210502 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |