CN108151865A - A kind of bamboo joint type fiber laser hydrophone encapsulating structure and its assembly method - Google Patents
A kind of bamboo joint type fiber laser hydrophone encapsulating structure and its assembly method Download PDFInfo
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- CN108151865A CN108151865A CN201711291930.7A CN201711291930A CN108151865A CN 108151865 A CN108151865 A CN 108151865A CN 201711291930 A CN201711291930 A CN 201711291930A CN 108151865 A CN108151865 A CN 108151865A
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- laemodipodiform
- spring cylinder
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- fiber laser
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
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- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of bamboo joint type fiber laser hydrophone encapsulating structure and its assembly method and a kind of processing methods of laemodipodiform spring cylinder；Wherein, the encapsulating structure, including：A pair of of end cap, a pair of of flexible sheet, laemodipodiform spring cylinder and Active Optical Fiber；The outer surface of laemodipodiform spring cylinder is provided with multiple circular grooves；The inside of laemodipodiform spring cylinder has filled silicone oil；A pair of of flexible sheet is glued to the both ends of laemodipodiform spring cylinder respectively；A pair of of end cap is separately positioned on the both ends of laemodipodiform spring cylinder；Air cavity structure is formed between end cap and flexible sheet；Active Optical Fiber is located at laemodipodiform spring cylinder axis line inside position, and the both ends of Active Optical Fiber are pierced by respectively from the pair of end cap.Bamboo joint type fiber laser hydrophone encapsulating structure of the present invention ensure that fiber laser hydrophone has flat frequency response and higher sensitivity in low-frequency range while size thin footpath is met.
Description
Technical field
The invention belongs to technical field of optical fiber sensing more particularly to a kind of bamboo joint type fiber laser hydrophone encapsulating structure and
Its assembly method and a kind of processing method of laemodipodiform spring cylinder.
Background technology
Fiber laser hydrophone relies on " active " Fiber Bragg Grating technology, by " active " fiber grating as sensing element,
The fiber bragg grating with certain phase shift is inscribed in er-doped or erbium-ytterbium co-doped fiber and forms distributed feedback optical fiber laser.
Caused phase shift variations obtain underwater sound signal after acting on the laser resonant cavity by the extraneous acoustic pressure of detection.Due to distributed feed-back
Formula optical fiber laser is the direct etching grating on optical fiber, and diameter is exactly the diameter of optical fiber, so obtained after being encapsulated to it
Fiber laser hydrophone not only has many advantages, such as fibre optic hydrophone low frequency high sensitivity, electromagnetism interference, diameter, weight etc.
Much smaller than common hydrophone and interference formula fibre optic hydrophone.
For example, a kind of existing optical fiber grating sonic device, the cylindrical type which has axially symmetric structure for one
Fiber grating is fixed in cylindrical type support tube by support tube by elastomer, realizes that the pickup to acoustical signal perceives.However,
It is found during fiber laser hydrophone experimental test, the encapsulating structure of the simple cylindrical type support tube using axially symmetric structure
Although fiber laser hydrophone can realize the reception test of underwater sound signal, when hydrophone diameter becomes smaller, working frequency range
During decline, low frequency response flat type and sensitivity are all declined, particularly when frequency range drops to below 200Hz, hydrophone
There are resonance at multiple Frequency points, seriously affect the low frequency response characteristic of fiber laser hydrophone, and then influence to use.Cause
This, how to improve Frequency Response of the fiber laser hydrophone under thin footpath size is that ultra-fine diameter fiber laser hydrophone on a large scale should
With one of important technology that must be solved.
Invention content
The technology of the present invention solves the problems, such as：Overcome the deficiencies of the prior art and provide a kind of bamboo joint type fiber laser hydrophone
Encapsulating structure and its assembly method and a kind of processing method of laemodipodiform spring cylinder while size thin footpath is met, are protected
Demonstrate,prove fiber laser hydrophone has flat frequency response and higher sensitivity in low-frequency range.
In order to solve the above-mentioned technical problem, the invention discloses a kind of bamboo joint type fiber laser hydrophone encapsulating structure, packets
It includes：A pair of of end cap, a pair of of flexible sheet, laemodipodiform spring cylinder and Active Optical Fiber；
The outer surface of laemodipodiform spring cylinder is provided with multiple circular grooves, in the dentalation with recess and protrusion；Wherein, bamboo
The inside of section shape spring cylinder has filled silicone oil；
A pair of of flexible sheet is glued to the both ends of laemodipodiform spring cylinder respectively；
A pair of of end cap is separately positioned on the both ends of laemodipodiform spring cylinder, is respectively encapsulated in the pair of flexible sheet described
Between laemodipodiform spring cylinder and end cap；Wherein, air cavity structure is formed between end cap and flexible sheet；
Active Optical Fiber is located at laemodipodiform spring cylinder axis line inside position, and the both ends of Active Optical Fiber are respectively from the pair of end
Lid is pierced by.
In above-mentioned bamboo joint type fiber laser hydrophone encapsulating structure, the laemodipodiform spring cylinder, including：Metal structure
Ring frame and ring rubber bodies；
Ring frame is provided with multiple sound transmitting windows in the axial direction, and ring frame is in engraved structure；Wherein, the ring frame
The outer surface of frame is：Dentalation with recess and protrusion；
Ring rubber bodies are located at the ring lower portion, the outer surface of ring rubber bodies and the interior table of the ring frame
Face paste is closed；Wherein, the outer surface of the ring rubber bodies, corresponding to being at the multiple entrant sound window position：With recess and it is convex
The dentalation risen；
Recess and protrusion and the recess on the ring rubber external surface and protrusion on ring frame outer surface is complementary,
Form multiple circular grooves on the laemodipodiform spring cylinder outer surface.
In above-mentioned bamboo joint type fiber laser hydrophone encapsulating structure,
Recess and protrusion on ring frame outer surface press 1 along the axis direction of ring frame：1 size is set；
Recess and protrusion on ring rubber external surface press 1 along the axis direction of ring rubber bodies：1 size is set.
In above-mentioned bamboo joint type fiber laser hydrophone encapsulating structure, the multiple sound transmitting window is four；Four sound transmitting windows
It is set between any two in 90 ° of angles.
In above-mentioned bamboo joint type fiber laser hydrophone encapsulating structure,
The grating of Active Optical Fiber is located at the middle part of the laemodipodiform spring cylinder；
The cementing of Active Optical Fiber is erected on the pair of flexible sheet.
In above-mentioned bamboo joint type fiber laser hydrophone encapsulating structure, the center position setting of the pair of flexible sheet
There is the first die ontology fine hole；The center position of the pair of end cap is provided with the second die ontology fine hole；
Wherein, the both ends of the Active Optical Fiber are pierced by respectively by the first die ontology fine hole and the second die ontology fine hole.
In above-mentioned bamboo joint type fiber laser hydrophone encapsulating structure, end cap, including：Glue-filling slot, the first stepped groove and
Two stepped grooves；
The one end for being glued the laemodipodiform spring cylinder of flexible diaphragm is arranged in the second stepped groove；
Air cavity structure is formed between flexible sheet and the first stepped groove；
Fluid sealant is cast in glue-filling slot.
In above-mentioned bamboo joint type fiber laser hydrophone encapsulating structure, axis of the air cavity structure along the laemodipodiform spring cylinder
The length in direction is 0.2~0.5mm.
Correspondingly, the invention also discloses a kind of assembly method of bamboo joint type fiber laser hydrophone encapsulating structure, including：
A pair of of flexible sheet is glued to the both ends of laemodipodiform spring cylinder respectively；Wherein, the outer surface of laemodipodiform spring cylinder
Multiple circular grooves are provided with, in the dentalation with recess and protrusion；
It, will be in Silicone oil injection laemodipodiform spring cylinder by the die ontology fine hole set on flexible sheet；
After silicone oil is filled in laemodipodiform spring cylinder, Active Optical Fiber is penetrated by the die ontology fine hole on either side flexible sheet,
And it is pierced by from the die ontology fine hole on opposite side flexible sheet；Active Optical Fiber is located at laemodipodiform spring cylinder axis line inside position；
By a pair of of end cap respectively according at the both ends of laemodipodiform spring cylinder, the pair of flexible sheet is encapsulated in institute respectively
It states between laemodipodiform spring cylinder and end cap；Wherein, air cavity structure is formed between end cap and flexible sheet.
Correspondingly, this is the invention discloses a kind of processing method of laemodipodiform spring cylinder, including：
Select two cylindrical dies；Wherein, the outer diameter of the first cylindrical die is less than the internal diameter of the ring frame, the
The internal diameter of two cylindrical dies is identical with the maximum outside diameter of the ring frame；
By the first cylindrical die be inserted into metal structure ring lower portion and, by the second cylindrical die be set with
In the outer surface of ring frame；Wherein, ring frame is provided with multiple sound transmitting windows in the axial direction, and ring frame is in hollow out knot
Structure, the outer surface of ring frame are：Dentalation with recess and protrusion；The inner surface of second cylindrical die is set as：
Dentalation with recess and protrusion；The recess of ring frame corresponds to the protrusion of the second cylindrical die, ring frame
Protrusion corresponds to the recess of the second cylindrical die；
Filling polyurethane glue, removes described first between the first cylindrical die and the second cylindrical die after curing
Cylindrical die and the second cylindrical die, obtain laemodipodiform spring cylinder.
The present invention has the following advantages：
(1) it the invention discloses a kind of bamboo joint type fiber laser hydrophone encapsulating structure, is provided with including outer surface multiple
Circular groove, in the laemodipodiform spring cylinder of the dentalation with recess and protrusion, the bamboo realized based on the laemodipodiform spring cylinder
Section formula fiber laser hydrophone encapsulating structure, can be when fiber laser hydrophone diameter be very thin with higher resonance frequency
It is flat to ensure that fiber laser hydrophone has in low-frequency range while fiber laser hydrophone size thin footpath is met for rate
Frequency response and higher sensitivity.
(2) bamboo joint type fiber laser hydrophone encapsulating structure of the present invention uses laemodipodiform spring cylinder, has good
Spring effect, make while resonant frequency is improved stress be radial direction have enough deflections, so as to make optical-fiber laser
Hydrophone has sufficiently high sensitivity.
(3) need to power when in use the present invention overcomes active device in the prior art, easily by electromagnetic interference the defects of,
The acoustic signals for particularly overcoming output are easily decayed the defects of serious by electromagnetic environment and long-line transmission, in engineering reality
In, there is better stability.
Description of the drawings
Fig. 1 is a kind of schematic diagram of bamboo joint type fiber laser hydrophone encapsulating structure in the embodiment of the present invention；
Fig. 2 is a kind of structure diagram of ring frame in the embodiment of the present invention；
Fig. 3 is a kind of structure diagram of ring rubber bodies in the embodiment of the present invention；
Fig. 4 is a kind of structure diagram of laemodipodiform spring cylinder；
Fig. 5 is a kind of cross section view of bamboo joint type fiber laser hydrophone encapsulating structure in the embodiment of the present invention；
Fig. 6 is the partial enlarged view at the A of position in Fig. 5；
Fig. 7 is a kind of resonance response curve of bamboo joint type fiber laser hydrophone encapsulating structure in the embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, it is public to the present invention below in conjunction with attached drawing
Embodiment is described in further detail.
With reference to Fig. 1, a kind of schematic diagram of bamboo joint type fiber laser hydrophone encapsulating structure in the embodiment of the present invention is shown.
In the present embodiment, the bamboo joint type fiber laser hydrophone encapsulating structure, including：A pair of of end cap 1, a pair of of flexible sheet 2, bamboo
Save shape spring cylinder 3 and Active Optical Fiber 4.
In the present embodiment, the outer surface of laemodipodiform spring cylinder is provided with multiple circular grooves 301, in recess and protrusion
Dentalation；Wherein, the inside of laemodipodiform spring cylinder has filled silicone oil.A pair of of flexible sheet is glued to laemodipodiform spring cylinder respectively
Both ends；A pair of of end cap is separately positioned on the both ends of laemodipodiform spring cylinder, is respectively encapsulated in the pair of flexible sheet described
Between laemodipodiform spring cylinder and end cap；Wherein, air cavity structure is formed between end cap and flexible sheet；Active Optical Fiber is located at laemodipodiform
Spring cylinder axis line inside position, the both ends of Active Optical Fiber are pierced by respectively from the pair of end cap.
Wherein, polyurethane splicing may be used between laemodipodiform spring cylinder and flexible sheet.
With reference to Fig. 2, a kind of structure diagram of ring frame in the embodiment of the present invention is shown.With reference to Fig. 3, this is shown
A kind of structure diagram of ring rubber bodies in inventive embodiments.With reference to Fig. 1,2 and 3, in the present embodiment, the laemodipodiform bullet
Property cylinder 3 can specifically include：The ring frame 302 of metal structure and ring rubber bodies 303.Preferably, ring frame can be by
The metal material of high elastic modulus is made, and ring rubber bodies can be poured into a mould by polyurethane glue and are made.
Such as Fig. 2, ring frame 302 is provided with multiple sound transmitting windows 3021 in the axial direction, and ring frame is in engraved structure；Its
In, the outer surface of the ring frame is：Dentalation with recess 3022 and protrusion 3023.Such as Fig. 3, ring rubber bodies
303 outer surface, corresponding to being at the multiple entrant sound window position：Dentalation with recess 3032 and protrusion 3033.
With reference to Fig. 4, a kind of structure diagram of laemodipodiform spring cylinder in the embodiment of the present invention is shown.Such as Fig. 4, ring rubber
Colloid is located at the ring lower portion, and the outer surface of ring rubber bodies is bonded with the inner surface of the ring frame；Ring frame
Recess and protrusion and the recess on the ring rubber external surface and protrusion on frame outer surface is complementary, forms the laemodipodiform
Multiple circular grooves on spring cylinder outer surface.
Preferably, the recess and protrusion on ring frame outer surface presses 1 along the axis direction of ring frame：1 size is set
It puts；Recess and protrusion on ring rubber external surface press 1 along the axis direction of ring rubber bodies：1 size is set.That is, bamboo
The recess and protrusion saved on frame outer surface is kept with the recess on the ring rubber external surface and the size of protrusion, position
Unanimously, to realize the complementation in structure, multiple circular grooves on the laemodipodiform spring cylinder outer surface are formed.
Preferably, the multiple sound transmitting window can with but be not limited only to as four.Wherein, four sound transmitting windows are between any two
90 ° of angle settings.
With reference to Fig. 5, show that a kind of section of bamboo joint type fiber laser hydrophone encapsulating structure regards in the embodiment of the present invention
Figure.It is the partial enlarged view in Fig. 5 at the A of position with reference to Fig. 6.Such as Fig. 5 and Fig. 6, the center position of a pair of of flexible sheet 2 is set
It is equipped with the first die ontology fine hole 201；The center position of a pair of of end cap 1 is provided with the second die ontology fine hole 101；.Wherein, the light of Active Optical Fiber
Grid 401 are located at the middle part of the laemodipodiform spring cylinder；The cementing of Active Optical Fiber is erected on the pair of flexible sheet.
Such as Fig. 6, in the present embodiment, end cap 1 can also include：Glue-filling slot 102, the first stepped groove 103 and the second ladder
Slot 104.The one end for being glued the laemodipodiform spring cylinder of flexible diaphragm is arranged in the second stepped groove；Flexible sheet and the first ladder
Air cavity structure 105 is formed between slot；Fluid sealant (e.g., polyurethane, to realize sealing) is cast in glue-filling slot.Preferably, it is described
The length of air cavity structure along the axis direction of the laemodipodiform spring cylinder is 0.2~0.5mm.
In the present embodiment, during work, sound wave effect exists in superfine type fiber laser hydrophone surface, laemodipodiform spring cylinder
It is deformed upon under sound wave effect, and flows internal silicone oil, flexible sheet is in the promotion of laemodipodiform spring cylinder and silicone oil
It is lower to occur to move and the Active Optical Fiber grating inside laemodipodiform spring cylinder is driven to generate elongation or compression variation, lead to Active Optical Fiber
The optical wavelength of grating output changes, by measuring the variation of optical wavelength and can obtain acoustical signal by appropriate conversion
Situation of change.
In the present embodiment, laemodipodiform spring cylinder outer surface is provided with multiple circular grooves, reduces the matter of laemodipodiform spring cylinder
Amount, according to the relationship of frequency f in Elasticity and quality m(in formula, k represents elasticity modulus) was as can be seen that should
Kind design can improve the resonant frequency of structure under comparable size.With reference to Fig. 7, a kind of ring in the embodiment of the present invention is shown
The resonance response curve of formula fiber laser hydrophone encapsulating structure.As it can be seen that in below 4kHz frequency ranges, bamboo joint type optical-fiber laser water is listened
The frequency response curve of device encapsulating structure is very flat.Meanwhile the numerous recess of laemodipodiform spring cylinder are combined with protrusion, form spring-like
Structure, compared with prior art, keep reducing the mechanical impedance of structure while intensity is basically identical under comparable size,
Under the acoustic pressure for receiving same size, bamboo joint type fiber laser hydrophone encapsulating structure is axially more being also easy to produce elongation or compression change
Change, so as to higher sensitivity.
In conclusion bamboo joint type fiber laser hydrophone encapsulating structure of the present invention, is provided with more including outer surface
A circular groove in the laemodipodiform spring cylinder of the dentalation with recess and protrusion, is realized based on the laemodipodiform spring cylinder
Bamboo joint type fiber laser hydrophone encapsulating structure, can be when fiber laser hydrophone diameter be very thin with higher resonance
It is flat to ensure that fiber laser hydrophone has in low-frequency range while fiber laser hydrophone size thin footpath is met for frequency
Frequency response and higher sensitivity.
Secondly, bamboo joint type fiber laser hydrophone encapsulating structure of the present invention uses laemodipodiform spring cylinder, has good
Good spring effect, it is to have enough deflections in radial direction that stress is made while resonant frequency is improved, so as to swash optical fiber
Light hydrophone has sufficiently high sensitivity.
In addition, needing to power when in use the present invention overcomes active device in the prior art, easily lacked by electromagnetic interference
It falls into, the acoustic signals for particularly overcoming output are easily decayed the defects of serious by electromagnetic environment and long-line transmission, in engineering
In practical application, there is better stability.
On the basis of above-described embodiment, the invention also discloses a kind of bamboo joint type fiber laser hydrophone encapsulating structures
Assembly method, including：
A pair of of flexible sheet is glued to the both ends of laemodipodiform spring cylinder by step S11 respectively；Wherein, laemodipodiform spring cylinder
Outer surface be provided with multiple circular grooves, in recess and protrusion dentalation.
Step S12, will be in Silicone oil injection laemodipodiform spring cylinder by the die ontology fine hole set on flexible sheet.
Step S13, after silicone oil is filled in laemodipodiform spring cylinder, by Active Optical Fiber by excessively fine on either side flexible sheet
Hole penetrates, and is pierced by from the die ontology fine hole on opposite side flexible sheet；Active Optical Fiber is located at laemodipodiform spring cylinder axis line inside position
It puts.
Step S14, by a pair of of end cap respectively according at the both ends of laemodipodiform spring cylinder, respectively by the pair of flexible sheet
It is encapsulated between the laemodipodiform spring cylinder and end cap；Wherein, air cavity structure is formed between end cap and flexible sheet.
On the basis of above-described embodiment, the invention also discloses a kind of processing method of laemodipodiform spring cylinder, including：
Step S21 selects two cylindrical dies；Wherein, the outer diameter of the first cylindrical die is less than the ring frame
Internal diameter, the internal diameter of the second cylindrical die is identical with the maximum outside diameter of the ring frame.
Step S22, by the first cylindrical die be inserted into metal structure ring lower portion and, by second cylinder
Mold is sleeved on the outer surface of ring frame.
In the present embodiment, as previously mentioned, ring frame is provided with multiple sound transmitting windows in the axial direction, ring frame is in engrave
Hollow structure, the outer surface of ring frame are：Dentalation with recess and protrusion；The inner surface setting of second cylindrical die
For：Dentalation with recess and protrusion；The recess of ring frame is corresponding to the protrusion of the second cylindrical die, ring frame
Protrusion correspond to the second cylindrical die recess.
Step S23, filling polyurethane glue, is removed after curing between the first cylindrical die and the second cylindrical die
First cylindrical die and the second cylindrical die, obtain laemodipodiform spring cylinder.
For embodiment of the method, since it is corresponding with device embodiment, so description is fairly simple, correlation
Place referring to device embodiment part explanation.
Each embodiment in this explanation is described by the way of progressive, the highlights of each of the examples are with its
The difference of his embodiment, just to refer each other for identical similar part between each embodiment.
The above, best specific embodiment only of the invention, but protection scope of the present invention is not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, the change or replacement that can be readily occurred in,
It should be covered by the protection scope of the present invention.
The content not being described in detail in description of the invention belongs to the known technology of professional and technical personnel in the field.
Claims (10)
1. a kind of bamboo joint type fiber laser hydrophone encapsulating structure, which is characterized in that including：A pair of of end cap, a pair of of flexible sheet,
Laemodipodiform spring cylinder and Active Optical Fiber；
The outer surface of laemodipodiform spring cylinder is provided with multiple circular grooves, in the dentalation with recess and protrusion；Wherein, laemodipodiform
The inside of spring cylinder has filled silicone oil；
A pair of of flexible sheet is glued to the both ends of laemodipodiform spring cylinder respectively；
A pair of of end cap is separately positioned on the both ends of laemodipodiform spring cylinder, and the pair of flexible sheet is encapsulated in the ring respectively
Between shape spring cylinder and end cap；Wherein, air cavity structure is formed between end cap and flexible sheet；
Active Optical Fiber is located at laemodipodiform spring cylinder axis line inside position, and the both ends of Active Optical Fiber are worn respectively from the pair of end cap
Go out.
2. bamboo joint type fiber laser hydrophone encapsulating structure according to claim 1, which is characterized in that the laemodipodiform bullet
Property cylinder, including：The ring frame of metal structure and ring rubber bodies；
Ring frame is provided with multiple sound transmitting windows in the axial direction, and ring frame is in engraved structure；Wherein, the ring frame
Outer surface is：Dentalation with recess and protrusion；
Ring rubber bodies are located at the ring lower portion, and the outer surface of ring rubber bodies and the inner surface of the ring frame paste
It closes；Wherein, the outer surface of the ring rubber bodies, corresponding to being at the multiple entrant sound window position：With recess and protrusion
Dentalation；
Recess and protrusion and the recess on the ring rubber external surface and protrusion on ring frame outer surface is complementary, is formed
Multiple circular grooves on the laemodipodiform spring cylinder outer surface.
3. bamboo joint type fiber laser hydrophone encapsulating structure according to claim 2, which is characterized in that
Recess and protrusion on ring frame outer surface press 1 along the axis direction of ring frame：1 size is set；
Recess and protrusion on ring rubber external surface press 1 along the axis direction of ring rubber bodies：1 size is set.
4. bamboo joint type fiber laser hydrophone encapsulating structure according to claim 2, which is characterized in that the multiple entrant sound
Window is four；Four sound transmitting windows are set between any two in 90 ° of angles.
5. bamboo joint type fiber laser hydrophone encapsulating structure according to claim 1, which is characterized in that
The grating of Active Optical Fiber is located at the middle part of the laemodipodiform spring cylinder；
The cementing of Active Optical Fiber is erected on the pair of flexible sheet.
6. bamboo joint type fiber laser hydrophone encapsulating structure according to claim 1, which is characterized in that the pair of elasticity
The center position of diaphragm is provided with the first die ontology fine hole；The center position of the pair of end cap is provided with the second die ontology fine hole；
Wherein, the both ends of the Active Optical Fiber are pierced by respectively by the first die ontology fine hole and the second die ontology fine hole.
7. bamboo joint type fiber laser hydrophone encapsulating structure according to claim 1, which is characterized in that end cap, including：It fills
Glue groove, the first stepped groove and the second stepped groove；
The one end for being glued the laemodipodiform spring cylinder of flexible diaphragm is arranged in the second stepped groove；
Air cavity structure is formed between flexible sheet and the first stepped groove；
Fluid sealant is cast in glue-filling slot.
8. bamboo joint type fiber laser hydrophone encapsulating structure according to claim 1, which is characterized in that air cavity structure is along institute
The length for stating the axis direction of laemodipodiform spring cylinder is 0.2~0.5mm.
9. a kind of assembly method of bamboo joint type fiber laser hydrophone encapsulating structure, which is characterized in that including：
A pair of of flexible sheet is glued to the both ends of laemodipodiform spring cylinder respectively；Wherein, the outer surface setting of laemodipodiform spring cylinder
There are multiple circular grooves, in the dentalation with recess and protrusion；
It, will be in Silicone oil injection laemodipodiform spring cylinder by the die ontology fine hole set on flexible sheet；
After silicone oil is filled in laemodipodiform spring cylinder, Active Optical Fiber is penetrated by the die ontology fine hole on either side flexible sheet, and from
Die ontology fine hole on opposite side flexible sheet is pierced by；Active Optical Fiber is located at laemodipodiform spring cylinder axis line inside position；
By a pair of of end cap respectively according at the both ends of laemodipodiform spring cylinder, the pair of flexible sheet is encapsulated in the bamboo respectively
It saves between shape spring cylinder and end cap；Wherein, air cavity structure is formed between end cap and flexible sheet.
10. a kind of processing method of laemodipodiform spring cylinder, which is characterized in that including：
Select two cylindrical dies；Wherein, the outer diameter of the first cylindrical die is less than the internal diameter of the ring frame, the second circle
The internal diameter of cylindrical mold is identical with the maximum outside diameter of the ring frame；
By the first cylindrical die be inserted into metal structure ring lower portion and, the second cylindrical die is sleeved on bamboo
Save the outer surface of frame；Wherein, ring frame is provided with multiple sound transmitting windows in the axial direction, and ring frame is in engraved structure, bamboo
The outer surface of section frame is：Dentalation with recess and protrusion；The inner surface of second cylindrical die is set as：With recessed
Fall into the dentalation with protrusion；The recess of ring frame corresponds to the protrusion of the second cylindrical die, and the protrusion of ring frame is right
It should be in the recess of the second cylindrical die；
The filling polyurethane glue between the first cylindrical die and the second cylindrical die, removes first cylinder after curing
Shape mold and the second cylindrical die, obtain laemodipodiform spring cylinder.
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| CN201711291930.7A CN108151865B (en) | 2017-12-08 | 2017-12-08 | Bamboo joint type optical fiber laser hydrophone packaging structure and assembling method thereof |
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| CN201711291930.7A CN108151865B (en) | 2017-12-08 | 2017-12-08 | Bamboo joint type optical fiber laser hydrophone packaging structure and assembling method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109186740A (en) * | 2018-09-21 | 2019-01-11 | 湖南长城海盾光纤科技有限公司 | A kind of fiber optic hydrophone unit encapsulating structure and packaging method |
| CN109374751A (en) * | 2018-11-01 | 2019-02-22 | 北京航空航天大学 | A kind of fiber optic loop acoustic emission sensor and packaging method |
| CN111337117A (en) * | 2020-04-14 | 2020-06-26 | 青岛海洋科学与技术国家实验室发展中心 | Optical fiber laser hydrophone |
| CN111412975A (en) * | 2020-04-23 | 2020-07-14 | 山东省科学院激光研究所 | Embedded optical fiber laser hydrophone and array structure and cabling process thereof |
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| CN109186740A (en) * | 2018-09-21 | 2019-01-11 | 湖南长城海盾光纤科技有限公司 | A kind of fiber optic hydrophone unit encapsulating structure and packaging method |
| CN109374751A (en) * | 2018-11-01 | 2019-02-22 | 北京航空航天大学 | A kind of fiber optic loop acoustic emission sensor and packaging method |
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| CN111337117B (en) * | 2020-04-14 | 2022-07-05 | 青岛海洋科学与技术国家实验室发展中心 | Optical fiber laser hydrophone |
| CN111412975A (en) * | 2020-04-23 | 2020-07-14 | 山东省科学院激光研究所 | Embedded optical fiber laser hydrophone and array structure and cabling process thereof |
| CN113639843A (en) * | 2020-04-27 | 2021-11-12 | 山东省科学院激光研究所 | Surface-mounted optical fiber laser hydrophone based on diaphragm and micro-ring structure and application thereof |
| CN113639843B (en) * | 2020-04-27 | 2024-01-26 | 山东省科学院激光研究所 | Patch type optical fiber laser hydrophone based on diaphragm and micro-ring structure and application thereof |
| CN112816054A (en) * | 2020-12-30 | 2021-05-18 | 北京航天控制仪器研究所 | Optical fiber laser microphone with special-shaped spring type sensitivity enhancing structure |
| CN112924013A (en) * | 2021-01-28 | 2021-06-08 | 哈尔滨工程大学 | Acceleration-resistant optical fiber hydrophone probe device |
| CN113899440A (en) * | 2021-09-06 | 2022-01-07 | 中国水利水电科学研究院 | Distributed sound-sensitive optical fiber sensor and manufacturing method thereof |
| CN114593811A (en) * | 2022-02-28 | 2022-06-07 | 浙江大学 | Low-pass filtering fiber grating hydrophone adopting cymbal-shaped diaphragm |
| CN114623917A (en) * | 2022-02-28 | 2022-06-14 | 浙江大学 | Low-pass filtering fiber grating hydrophone adopting frustum-shaped diaphragm |
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