CN114623916A - Fiber grating hydrophone adopting double-cone-frustum-shaped diaphragm - Google Patents
Fiber grating hydrophone adopting double-cone-frustum-shaped diaphragm Download PDFInfo
- Publication number
- CN114623916A CN114623916A CN202210190438.5A CN202210190438A CN114623916A CN 114623916 A CN114623916 A CN 114623916A CN 202210190438 A CN202210190438 A CN 202210190438A CN 114623916 A CN114623916 A CN 114623916A
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- China
- Prior art keywords
- frustum
- diaphragm
- fiber grating
- supporting cylinder
- hydrophone
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- Pending
Links
- 239000000835 fiber Substances 0.000 title claims abstract description 43
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052802 copper Inorganic materials 0.000 claims abstract description 12
- 239000010949 copper Substances 0.000 claims abstract description 12
- 239000012528 membrane Substances 0.000 claims description 5
- 239000003566 sealing material Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 239000013307 optical fiber Substances 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 4
- 230000007123 defense Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H3/00—Measuring characteristics of vibrations by using a detector in a fluid
Abstract
The invention relates to a fiber grating hydrophone adopting a double-cone frustum-shaped diaphragm, and belongs to the technical field of fiber hydrophones. The outside cover of support drum has the sound-transmitting rubber cover, and support drum both sides rigid coupling respectively left shell and right shell, and left frustum shape diaphragm and right frustum shape diaphragm are installed to the inside symmetry fixed mounting of support drum, install left copper sheet and right copper sheet on the diaphragm and be used for fixed fiber grating, and fiber grating passes the hole on the hydrophone axis. The advantages are that: the change of the volume of the oil cavity caused by the sound pressure is converted into the length change of the fiber grating by the frustum-shaped diaphragm, the structure is simple, on the basis, the characteristic that the frustum-shaped diaphragm is not easy to deform is utilized, and the reliability and the stability of the structure are improved by adopting a mode that the diaphragm is fixedly connected with the supporting cylinder.
Description
Technical Field
The invention belongs to the technical field of fiber optic hydrophones, and particularly relates to a fiber grating hydrophone adopting a double-cone-frustum-shaped diaphragm.
Background
Acoustic waves are currently the only form of energy known to man that can be transmitted over great distances in sea water. Hydrophones are a class of sensors used to detect underwater sound waves for navigation, measurement, and communication. The conventional hydrophones can be classified into electrodynamic type, capacitive type, piezoelectric type and the like according to different principles of detecting underwater acoustic signals.
In recent years, with the rapid development of fiber optic light sources, fiber optic spectrometers and fiber grating processing technologies, fiber grating hydrophones with high performance, miniaturization and high stability are gradually called as new-generation underwater acoustic detection sensors. The fiber grating hydrophone taking the fiber grating as the sensing source is widely concerned by scientific research institutions and scholars at home and abroad in the application fields of national defense, military, detection and the like, and the related technology is unprecedented developed. Compared with other types of hydrophones, the fiber bragg grating hydrophone has the advantages of low noise, high sensitivity, large dynamic range, excellent reliability and the like, and the packaged optical fiber is used as a connecting piece, so that the fiber bragg grating hydrophone is very suitable for forming a large-scale hydrophone array, and the fiber bragg grating hydrophone is taken as national defense technical equipment which is mainly researched and developed by many countries.
The fiber grating sensor realizes a sensing function by utilizing the optical waveguide characteristic of optical fibers and the modulation effect that the grating reflects specific wavelengths and has specific parameters in a sensing environment, and the fiber grating hydrophone acquires underwater pressure and sound signals by utilizing the sensor characteristic of the fiber grating. Compared with the conventional piezoelectric hydrophone, the optical fiber hydrophone has the following advantages: the optical fiber spectrometer has the advantages of wide frequency band, high sensitivity, no electromagnetic interference, small mass, small volume and simple structure, is combined with an optical fiber light source and an optical fiber spectrometer, can be integrated and produced, and has great application prospect.
At present, the development direction of fiber grating hydrophones at present is to improve the pressure sensitivity of the fiber grating hydrophones, restrict the working frequency range of the fiber grating hydrophones by adopting a filtering structure and improve the structure to adapt to specific application occasions. How to solve the important technical problems of large acceleration response and high low-frequency-band noise existing in the existing optical fiber hydrophone, and further exploration and promotion are needed.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the reliability and the stability of the fiber grating hydrophone during working are improved by introducing the frustum-shaped diaphragm and fixedly connecting the diaphragm with the main structure, so that the problems that the sealing structure fails due to the relative motion of the diaphragm and the structure, the relative motion causes abrasion, the service life of the structure is reduced, and finally the feedback sensitivity to underwater acoustic signals is insufficient in the existing fiber grating hydrophone adopting the piston type planar diaphragm during working are solved.
In order to solve the technical problems, the invention adopts the technical scheme that:
the sound-transmitting rubber sleeve (3) is sleeved on the outer side of the supporting cylinder (7), the two sides of the supporting cylinder (7) are fixedly connected with the left shell (1) and the right shell (5) respectively, a left frustum-shaped diaphragm (201) and a right frustum-shaped diaphragm (401) are symmetrically and fixedly installed in the supporting cylinder (7), a left copper sheet (202) and a right copper sheet (402) are installed on the diaphragms and used for fixing the fiber bragg grating (6), and the fiber bragg grating (6) penetrates through a hole in the central axis of the hydrophone; sealing materials are filled in gaps at the contact positions of the fiber bragg grating (6) and the hydrophone; the left shell (1), the supporting cylinder (7) and the left frustum-shaped membrane (201) form a closed cavity; the right shell (5), the supporting cylinder (7) and the right frustum-shaped membrane (401) form a closed cavity; an oil cavity is formed by the left frustum-shaped diaphragm (201), the right frustum-shaped diaphragm (401), the supporting cylinder (7) and the sound-transmitting rubber sleeve (3), and oil is filled in the oil cavity; the upper side and the lower side of the middle part of the supporting cylinder (7) are provided with holes for transmitting sound pressure in water.
The invention has the advantages that: the change of the volume of the oil cavity caused by the sound pressure is converted into the length change of the fiber grating by the frustum-shaped diaphragm, the structure is simple, on the basis, the characteristic that the frustum-shaped diaphragm is not easy to deform is utilized, and the reliability and the stability of the structure are improved by adopting a mode that the diaphragm is fixedly connected with the supporting cylinder.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a side cross-sectional view of the medial axis of the present invention.
Detailed Description
Specifically describing the present embodiment with reference to fig. 1 and fig. 2, in the fiber grating hydrophone adopting the biconical frustum-shaped diaphragm according to the present embodiment, the sound-transparent rubber sleeve 3 is sleeved outside the supporting cylinder 7, the left shell 1 and the right shell 5 are fixedly connected to two sides of the supporting cylinder 7 respectively, the left frustum-shaped diaphragm 201 and the right frustum-shaped diaphragm 401 are symmetrically and fixedly installed inside the supporting cylinder 7, the left copper sheet 202 and the right copper sheet 402 are installed on the diaphragms and used for fixing the fiber grating 6, and the fiber grating 6 passes through a hole in the central axis of the hydrophone; sealing materials are filled in gaps at the contact positions of the fiber bragg grating 6 and the hydrophone; the left shell 1, the supporting cylinder 7 and the left frustum-shaped diaphragm 201 form a closed cavity; the right shell 5, the supporting cylinder 7 and the right frustum-shaped diaphragm 401 form a closed cavity; the left frustum-shaped membrane 201, the right frustum-shaped membrane 401, the supporting cylinder 7 and the sound-transmitting rubber sleeve 3 form an oil cavity, and oil is filled in the oil cavity; the upper side and the lower side of the middle part of the supporting cylinder 7 are provided with holes for transmitting sound pressure in water.
The fiber grating hydrophone disclosed by the invention has the following working principle: when the hydrophone receives underwater sound pressure underwater, the sound pressure acts on oil in an oil cavity through the sound-transmitting rubber sleeve 3, the oil is extruded and transmits the pressure to the left frustum-shaped diaphragm 201 and the right frustum-shaped diaphragm 401 which are fixed on the supporting cylinder 7, the left frustum-shaped diaphragm 201 and the right frustum-shaped diaphragm 401 deform axially and transmit the deformation to the fiber grating 6 fixed between the left copper sheet 202 and the right copper sheet 402, when the fiber grating 6 deforms axially, the wavelength of reflected light can change, and corresponding underwater sound information can be obtained by measuring the wavelength reflected in the fiber grating 6.
Claims (1)
1. A fiber grating hydrophone employing a biconical truncated diaphragm, comprising: left shell (1), left frustum shape diaphragm (201), left copper sheet (202), sound-transmitting rubber sleeve (3), right frustum shape diaphragm (401), right copper sheet (402), right shell (5), fiber grating (6), support drum (7), its characterized in that: the sound-transmitting rubber sleeve (3) is sleeved on the outer side of the supporting cylinder (7), the two sides of the supporting cylinder (7) are fixedly connected with the left shell (1) and the right shell (5) respectively, a left frustum-shaped diaphragm (201) and a right frustum-shaped diaphragm (401) are symmetrically and fixedly installed in the supporting cylinder (7), a left copper sheet (202) and a right copper sheet (402) are installed on the diaphragms and used for fixing the fiber bragg gratings (6), and the fiber bragg gratings (6) penetrate through holes in the central axis of the hydrophone; sealing materials are filled in gaps at the contact positions of the fiber bragg grating (6) and the hydrophone; the left shell (1), the supporting cylinder (7) and the left frustum-shaped diaphragm (201) form a closed cavity; the right shell (5), the supporting cylinder (7) and the right frustum-shaped membrane (401) form a closed cavity; an oil cavity is formed by the left frustum-shaped diaphragm (201), the right frustum-shaped diaphragm (401), the supporting cylinder (7) and the sound-transmitting rubber sleeve (3), and oil is filled in the oil cavity; the upper side and the lower side of the middle part of the supporting cylinder (7) are provided with holes for transmitting sound pressure in water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210190438.5A CN114623916A (en) | 2022-02-28 | 2022-02-28 | Fiber grating hydrophone adopting double-cone-frustum-shaped diaphragm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210190438.5A CN114623916A (en) | 2022-02-28 | 2022-02-28 | Fiber grating hydrophone adopting double-cone-frustum-shaped diaphragm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114623916A true CN114623916A (en) | 2022-06-14 |
Family
ID=81899263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210190438.5A Pending CN114623916A (en) | 2022-02-28 | 2022-02-28 | Fiber grating hydrophone adopting double-cone-frustum-shaped diaphragm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114623916A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101210832A (en) * | 2006-12-28 | 2008-07-02 | 中国科学院半导体研究所 | Optical fiber grating sonic device |
| CN101210842A (en) * | 2006-12-31 | 2008-07-02 | 中国科学院半导体研究所 | Static pressure self-compensation optical fibre grating sonic device |
| CN101285700A (en) * | 2007-04-11 | 2008-10-15 | 中国科学院半导体研究所 | Piston type optical fibre grating sonic device |
| US20120082415A1 (en) * | 2009-05-29 | 2012-04-05 | Ixblue | Bragg grating fiber hydrophone with a bellows amplifier |
| US20120093463A1 (en) * | 2009-05-29 | 2012-04-19 | Ixblue | Fiber bragg grating hydrophone comprising a diaphragm amplifier |
| US20140036635A1 (en) * | 2011-04-14 | 2014-02-06 | Thales | All-optical hydrophone insensitive to temperature and to static pressure |
| CN112924013A (en) * | 2021-01-28 | 2021-06-08 | 哈尔滨工程大学 | Acceleration-resistant optical fiber hydrophone probe device |
-
2022
- 2022-02-28 CN CN202210190438.5A patent/CN114623916A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101210832A (en) * | 2006-12-28 | 2008-07-02 | 中国科学院半导体研究所 | Optical fiber grating sonic device |
| CN101210842A (en) * | 2006-12-31 | 2008-07-02 | 中国科学院半导体研究所 | Static pressure self-compensation optical fibre grating sonic device |
| CN101285700A (en) * | 2007-04-11 | 2008-10-15 | 中国科学院半导体研究所 | Piston type optical fibre grating sonic device |
| US20120082415A1 (en) * | 2009-05-29 | 2012-04-05 | Ixblue | Bragg grating fiber hydrophone with a bellows amplifier |
| US20120093463A1 (en) * | 2009-05-29 | 2012-04-19 | Ixblue | Fiber bragg grating hydrophone comprising a diaphragm amplifier |
| US20140036635A1 (en) * | 2011-04-14 | 2014-02-06 | Thales | All-optical hydrophone insensitive to temperature and to static pressure |
| CN112924013A (en) * | 2021-01-28 | 2021-06-08 | 哈尔滨工程大学 | Acceleration-resistant optical fiber hydrophone probe device |
Non-Patent Citations (3)
| Title |
|---|
| 唐波 等: "光纤光栅水听器探头封装技术研究进展", 《光通信技术》 * |
| 唐波 等: "分布反馈式光纤激光水听器的声压灵敏度频率响应特性", 《光学学报》 * |
| 张文涛 等: "光纤激光水听器研究进展", 《集成技术》 * |
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Application publication date: 20220614 |