CN107990971A - A kind of three-dimensional differential optical fiber vector hydrophone - Google Patents
A kind of three-dimensional differential optical fiber vector hydrophone Download PDFInfo
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- CN107990971A CN107990971A CN201711450068.XA CN201711450068A CN107990971A CN 107990971 A CN107990971 A CN 107990971A CN 201711450068 A CN201711450068 A CN 201711450068A CN 107990971 A CN107990971 A CN 107990971A
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- hydrophone
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 54
- 239000000835 fiber Substances 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 230000001133 acceleration Effects 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000035945 sensitivity Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 230000001360 synchronised effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 206010070834 Sensitisation Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000008313 sensitization Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of three-dimensional differential optical fiber vector hydrophone, including base, pillar, 6 fibre optic hydrophones, hydrophone installing plate, hydrophone fixing piece, hydrophone Z axis fixing piece and cover board, the base includes base, reserved optic fibre exit, base cover plate, the pillar is made of 3 class pillars, No. 1 pillar runs through hydrophone installing plate, No. 2 pillars and No. 3 pillars support hydrophone installing plate jointly, and all pillars finally are connected to form newel frame with base, cover board；Fibre optic hydrophone is fixedly mounted with hydrophone fixing piece and hydrophone installing plate.The three-dimensional differential optical fiber vector hydrophone of the present invention is rational in infrastructure, and manufacture craft is simple, and reliability is high.Hydrophone of the present invention reduces the influence of the acceleration noise signal caused by vector hydrophone is installed on motion carrier well, with it is one-dimensional it is differential compared with, total space acoustic pressure and vector velocity of sound information can be obtained, through Underwater acoustic signal processing, the orientation of target can be directly obtained.
Description
Technical field
The invention belongs to Underwater Detection technical field, is related to a kind of three-dimensional differential optical fiber vector hydrophone.
Background technology
Optical fiber vector hydrophone be combined together based on optical fiber sensing technology with vector hydrophone technology it is a kind of new
The advantages of sensor, it has fibre optic hydrophone and vector hydrophone concurrently.On the one hand, fibre optic hydrophone and corresponding conventional hydrophone
Compare, there is obvious advantage in sensitivity, dynamic range, reliability etc..On the other hand, vector hydrophone is compared to mark
Amount hydrophone possesses pickup sound field Vector Message such as vibration velocity, acceleration etc.；Single probe has cosine directivity, can distinguish left and right
The side of a ship；Acoustic pressure expands signal processing space with vibration velocity Combined Treatment；Effectively suppress isotropic noise.
At present, in all kinds of optical fiber vector hydrophone, mainly there is same vibration shape optical fiber vector hydrophone and differential
Optical fiber vector hydrophone.Stringent manufacture craft is used with vibration shape vector hydrophone, array element is met have in propagation medium
The vibration mode identical with particle in propagation medium, vibration velocity information is obtained using the inertance element inside array element.Differential arrow
Amount hydrophone obtains vibration velocity information using the difference of 2 near acoustic pressure array element of distance.Work based on two class vector hydrophones
Principle difference, it is differential compared with synchronous vibration type to there is installation to lay simply, it is easy to accomplish resistance to mechanical is vibrated, and is more suitable for such as UUV, deep water
The underwater manoeuvre carrier such as bomb.However, the optical fiber vector hydrophone that major colleges and universities, institute develop is concentrated mainly on synchronous vibration type
On, and be rarely reported on differential optical fiber vector hydrophone, especially three-dimensional differential optical fiber vector hydrophone, existing document
Mainly low-dimensional (concentrating on one-dimensional, two-dimentional) differential optical fiber vector hydrophone is divided in terms of sensing principle and detection calibration
Analysis and research.Such as：(Lv Wen builds differentials optical fiber vector hydrophone primitive and measuring technology [D] Harbin：Harbin Institute of Engineering is big
Learn, 2009) by the sensitization of paravariable column body and the conduction of diaphragm, devise a kind of differential optical fiber vector hydrophone
Primitive is sensed, establishes the analysis model of sensing primitive.
The content of the invention
It is an object of the present invention to provide a kind of three-dimensional differential optical fiber vector hydrophone, differential optical fiber vector is utilized
Hydrophone technology replaces synchronous vibration type optical fiber vector hydrophone and piezoelectric vector hydrophone, it can both solve synchronous vibration type vector hydrophone
The problems such as acceleration noise signal introduced to suspension installation, motor-driven carrier, and piezoelectric vector hydrophone sensitivity can be overcome not
Height, disclosure satisfy that requirement of the underwater manoeuvre carrier to Underwater Detection.
Its technical solution is specific as follows：
A kind of three-dimensional differential optical fiber vector hydrophone, including base 1,2,6 fibre optic hydrophones 3 of pillar, hydrophone peace
Loading board 4, hydrophone fixing piece 5, hydrophone Z axis fixing piece 6 and cover board 7,
The base 1 includes base 11, reserved optic fibre exit 12, base cover plate 13, and the pillar 2 is by 3 class pillar structures
Into No. 1 pillar 21 supports hydrophone installing plate 4 jointly through 4, No. 2 pillars 22 of hydrophone installing plate and No. 3 pillars 23, owns
Pillar is finally connected with base 1, cover board 7 and to form newel frame；
Fibre optic hydrophone 3 is fixedly mounted with hydrophone fixing piece 5 and hydrophone installing plate 4.
Further, the 2 overall length L of pillar>D+2r, d are differential axial optical fiber hydrophone spacing, and r is fibre optic hydrophone
Radius.
Further, 23 each 4, the pillar 22,3 of No. 1 pillar 21,2 pillar is symmetrical along cylinder edge.
Further, in 6 fibre optic hydrophones 3, wherein 4 fibre optic hydrophones 3 erect the orthogonal X/Y plane that is equally spaced,
Other 2 fibre optic hydrophones 3 are fixed in Z axis to hydrophone Z axis fixing piece 6 so that 3 traverse of fibre optic hydrophone is put down with X/Y plane
OK, while meet that each 3 spacing of axial optical fiber hydrophone is d；Hydrophone Z axis fixing piece 6 is individually fixed in base 1 and cover board 7.
Beneficial effects of the present invention：
The three-dimensional pressure-gradient vector transducer of the present invention is rational in infrastructure, and manufacture craft is simple, and reliability is high.Water of the present invention is listened
Device reduces the influence of the acceleration noise signal caused by vector hydrophone is installed on motion carrier well, with one-dimensional
It is differential to compare, total space acoustic pressure and vector velocity of sound information can be obtained, by Underwater acoustic signal processing, the side of target can be directly obtained
Position.
Brief description of the drawings
Fig. 1 is the three-dimensional differential optical fiber vector hydrophone structure diagram of the present invention；
Fig. 2 is the understructure schematic diagram for having the function of optical fiber storage storehouse；
Fig. 3 is the structure diagram of shown pillar；
Fig. 4 is three-dimensional differential fibre optic hydrophone core optical fiber hydrophone structure schematic diagram；
Fig. 5 is shown fibre optic hydrophone anchor structure schematic diagram；
Fig. 6 is shown fibre optic hydrophone installing plate；
Fig. 7 is shown Z axis fibre optic hydrophone anchor structure schematic diagram；
Fig. 8 is shown upper end cover plate structure schematic diagram.
Embodiment
Technical scheme is described in more detail with reference to the accompanying drawings and detailed description.
The optical fiber vector hydrophone is mainly distributed on XYZ axis by 6 fibre optic hydrophone orthogonal spaces, and same direction
2 fibre optic hydrophone spacing are d, meet that same axis forms one-dimensional differential optical fiber vector hydrophone, the orthogonal each axial light of three axis
Center between fine hydrophone is overlapping, forms three-dimensional differential optical fiber vector hydrophone.Forward and backward two fibre optic hydrophones composition X
Road, two composition Y roads of left and right, and fibre optic hydrophone is erect on X, Y road, two upper and lower fibre optic hydrophones composition Z roads, its light
The fine horizontal traverse of hydrophone.The structure of the differential optical fiber vector hydrophone of the three-dimensional is by base, base cover plate, support column, optical fiber
Hydrophone, fibre optic hydrophone installing plate, fibre optic hydrophone fixing piece, cover board etc. are formed.Base forms the light of sealing with base cover
Fine storage storehouse, storage storehouse are reserved on base into fine mouth and outlet.The optical fiber that fibre optic hydrophone is drawn is entered by entering fine mouth
Storage storehouse, and external Transmission Fibers/optical cable is connected by outlet in storage storehouse with fibre optic hydrophone optical fiber.
With reference to Fig. 1-Fig. 8, a kind of three-dimensional differential optical fiber vector hydrophone, including 2,6 base 1, pillar optical fiber water are listened
Device 3, hydrophone installing plate 4, hydrophone fixing piece 5, hydrophone Z axis fixing piece 6 and cover board 7,
The base 1 includes base 11, reserved optic fibre exit 12, base cover plate 13, it is desirable to which sealing forms optical fiber storage
Storehouse, possesses optical fiber storage and provides certain buoyancy function under water；The pillar 2 is made of 3 class pillars, and No. 1 pillar 21 runs through
4, No. 2 pillars 22 of hydrophone installing plate and No. 3 pillars 23 support hydrophone installing plate 4 jointly, all pillars finally with base 1,
The connection of cover board 7 forms newel frame.It is required that pillar overall length L>D+2r, d are differential axial optical fiber hydrophone spacing, and r is optical fiber
Hydrophone radius.No. 1 23 each 4, the pillar of pillar 22,3 of pillar 21,2 is symmetrical along cylinder edge；Fibre optic hydrophone 3 is
Differential hydrophone core component, it is fixedly mounted with hydrophone fixing piece 5 and hydrophone installing plate 4,4 optical fiber of specific requirement
Hydrophone 3 erects the orthogonal X/Y plane that is equally spaced, and 2 fibre optic hydrophones 3 are fixed to hydrophone Z axis fixing piece 6 in Z axis, made
It is parallel with X/Y plane to obtain 3 traverse of fibre optic hydrophone, while meets that each 3 spacing of axial optical fiber hydrophone is d；Hydrophone Z axis is fixed
Part 6 is individually fixed in base 1 and cover board 7.
Fibre optic hydrophone sound pressure sensitivity MeWith the upper differential structure sound pressure sensitivity M of the axial directionpMeet：
Mp=2Mesin(kdcosθ/2) (1)
Wherein k=2 π/λ are incident acoustic wave wave vector, and λ is wave length of sound in media as well, and d is fibre optic hydrophone spacing, one
As differential hydrophone need to meet kd ＜ ＜ 1, θ is the angle of incidence wave and the axial optical fiber hydrophone.
Acoustic pressure p at centeroCan be by fibre optic hydrophone acoustic pressure pi(i=1 ..., 6) take average acquisition.Pressure difference is understood by (1) formula
The sound pressure sensitivity of formula optical fiber vector hydrophone is directly proportional to the sound pressure sensitivity of fibre optic hydrophone, realizes that optical fiber water is listened at present
In the case of device is in higher sensitivity, differential optical fiber vector hydrophone can also obtain higher sensitivity.
In the case where fibre optic hydrophone sound pressure sensitivity determines, the acoustic pressure that differential optical fiber vector hydrophone obtains is sensitive
Degree is directly proportional to the spacing of two fibre optic hydrophones, therefore is directed to different application scenarios, can optimize the outer of vector hydrophone
The size of shape size obtains the sound pressure sensitivity of higher.
The present invention can measure three dimensions acoustical signal, and export acoustical signal by tri- tunnel of X, Y, Z, two optical fiber per road
Hydrophone receives acoustical signal as sensitive inverting element, and the acoustical signal that fibre optic hydrophone receives is by optical fiber transition into optical signal
The signal processing module that transmission eventually enters into dry end realizes the extraction of signal.
The three-dimensional hydrophone compact overall structure, function expansibility are strong.Hang to form vector array such as by cover board；Also may be used
By being fixed on to base storage storehouse on underwater manoeuvre carrier or carrying out dilatation external signal-processing board, electronics sieve to storage storehouse
The peripheral hardwares such as disk, which are placed, wherein forms hydrophone mini system.
The axial pressure difference formula hydrophone, its fibre optic hydrophone are by high sensitivity, anti-acceleration fibre optic hydrophone structure
Into.The small fibre optic hydrophone of fibre optic hydrophone sensitivity difference should be chosen when selecting, usual standard requirement is suitable less than 1dB.
The foregoing is only a preferred embodiment of the present invention, protection scope of the present invention not limited to this, any ripe
Those skilled in the art are known in the technical scope of present disclosure, the letter for the technical solution that can be become apparent to
Altered or equivalence replacement are each fallen within protection scope of the present invention.
Claims (4)
- A kind of 1. three-dimensional differential optical fiber vector hydrophone, it is characterised in that：Listened including base (1), pillar (2), 6 optical fiber water Device (3), hydrophone installing plate (4), hydrophone fixing piece (5), hydrophone Z axis fixing piece (6) and cover board (7),The base (1) includes base (11), reserved optic fibre exit (12), base cover plate (13), and the pillar (2) is by 3 classes Pillar is formed, and No. 1 pillar (21) runs through hydrophone installing plate (4), and No. 2 pillars (22) with No. 3 pillars (23) listen jointly by support water Device installing plate (4), all pillars finally are connected to form newel frame with base (1), cover board (7)；Fibre optic hydrophone (3) is fixedly mounted with hydrophone fixing piece (5) and hydrophone installing plate (4).
- 2. the differential optical fiber vector hydrophone of three-dimensional according to claim 1, it is characterised in that：Pillar (2) the overall length L >D+2r, d are differential axial optical fiber hydrophone spacing, and r is fibre optic hydrophone radius.
- 3. the differential optical fiber vector hydrophone of three-dimensional according to claim 1, it is characterised in that：No. 1 pillar (21), No. 2 pillars (22), No. 3 each 4 of pillars (23) are symmetrical along cylinder edge.
- 4. the differential optical fiber vector hydrophone of three-dimensional according to claim 1, it is characterised in that：The 6 optical fiber water is listened In device (3), wherein 4 fibre optic hydrophones (3) erect the orthogonal X/Y plane that is equally spaced, in addition 2 fibre optic hydrophones (3) are in Z axis Fixed to hydrophone Z axis fixing piece (6) so that fibre optic hydrophone (3) traverse is parallel with X/Y plane, while meets each axial light Fine hydrophone (3) spacing is d；Hydrophone Z axis fixing piece (6) is individually fixed in base (1) and cover board (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711450068.XA CN107990971A (en) | 2017-12-27 | 2017-12-27 | A kind of three-dimensional differential optical fiber vector hydrophone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711450068.XA CN107990971A (en) | 2017-12-27 | 2017-12-27 | A kind of three-dimensional differential optical fiber vector hydrophone |
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| Publication Number | Publication Date |
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| CN107990971A true CN107990971A (en) | 2018-05-04 |
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| CN201711450068.XA Pending CN107990971A (en) | 2017-12-27 | 2017-12-27 | A kind of three-dimensional differential optical fiber vector hydrophone |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111158001A (en) * | 2018-11-07 | 2020-05-15 | 上海澜声电子科技有限公司 | Portable underwater positioning device |
| CN115389001A (en) * | 2022-07-19 | 2022-11-25 | 中国人民解放军国防科技大学 | Optical fiber vector hydrophone module |
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| US20150219776A1 (en) * | 2014-01-31 | 2015-08-06 | Pgs Geophysical As | Hydrophone |
| CN105092016A (en) * | 2015-07-14 | 2015-11-25 | 北京航天控制仪器研究所 | MOEMS vector hydrophone |
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| CN207570662U (en) * | 2017-12-27 | 2018-07-03 | 长沙深之瞳信息科技有限公司 | A kind of differential optical fiber vector hydrophone of three-dimensional |
-
2017
- 2017-12-27 CN CN201711450068.XA patent/CN107990971A/en active Pending
Patent Citations (6)
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| US20150219776A1 (en) * | 2014-01-31 | 2015-08-06 | Pgs Geophysical As | Hydrophone |
| CN105092016A (en) * | 2015-07-14 | 2015-11-25 | 北京航天控制仪器研究所 | MOEMS vector hydrophone |
| CN105387924A (en) * | 2015-12-31 | 2016-03-09 | 中国人民解放军国防科学技术大学 | Fiber optic vector hydrophone with posture self-correcting function |
| CN106289502A (en) * | 2016-08-11 | 2017-01-04 | 中国船舶重工集团公司第七〇五研究所 | A kind of trivector hydrophone based on distributed feedback optical fiber laser and phase demodulating method |
| CN106441545A (en) * | 2016-08-31 | 2017-02-22 | 北京越音速科技有限公司 | Pressure-gradient hydrophone, pressure gradient obtaining device, and pressure-gradient hydrophone apparatus |
| CN207570662U (en) * | 2017-12-27 | 2018-07-03 | 长沙深之瞳信息科技有限公司 | A kind of differential optical fiber vector hydrophone of three-dimensional |
Non-Patent Citations (1)
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111158001A (en) * | 2018-11-07 | 2020-05-15 | 上海澜声电子科技有限公司 | Portable underwater positioning device |
| CN115389001A (en) * | 2022-07-19 | 2022-11-25 | 中国人民解放军国防科技大学 | Optical fiber vector hydrophone module |
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Application publication date: 20180504 |