CN107677357A - A kind of symmetrical expression bobbin-type fiber optic hydrophone unit of resisting temperature drift - Google Patents
A kind of symmetrical expression bobbin-type fiber optic hydrophone unit of resisting temperature drift Download PDFInfo
- Publication number
- CN107677357A CN107677357A CN201710712116.1A CN201710712116A CN107677357A CN 107677357 A CN107677357 A CN 107677357A CN 201710712116 A CN201710712116 A CN 201710712116A CN 107677357 A CN107677357 A CN 107677357A
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- China
- Prior art keywords
- sensitive
- reference section
- skeleton
- optical fiber
- optic hydrophone
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
Abstract
The present invention relates to a kind of symmetrical expression bobbin-type fiber optic hydrophone unit of resisting temperature drift, hydrophone probe includes sensitive portion's end cap, sensitive portion's skeleton, sensitive thin-walled, sensitive optical fibre, enhanced sensitivity coating, reference section skeleton, reference optical fiber, reference section sleeve, reference section end cap, optical fiber watertight connector, trip bolt, first sealing ring and the second sealing ring, wherein reference section skeleton and sensitive thin-walled has identical characteristic size, it is and axially symmetric, when variation of ambient temperature, it is equal that sensitive optical fibre length change amount that is reference optical fiber on reference section skeleton and being wrapped on sensitive thin-walled can be ensured to be wrapped in, so as to ensure the constant phase difference of the two；Fibre optic hydrophone of the present invention compared with prior art, overcomes the defects of demodulated signal is easily influenceed by variation of ambient temperature, improves the reliability and accuracy of measurement of fibre optic hydrophone.
Description
Technical field
The invention belongs to fibre optic hydrophone field, and in particular to a kind of symmetrical expression bobbin-type optical fiber water of resisting temperature drift is listened
Device is popped one's head in.
Background technology
Fibre optic hydrophone is a kind of new underwater sound signal detection sensor based on optical fiber sensing technology, its sensitivity,
There is significant advantage compared with conventional piezoelectric hydrophone in terms of the indexs such as frequency band, electromagnetism interference.As interference type optical fiber hydrophone
Key link in demodulating process, the phase difference for accurately obtaining sensitive arm and reference arm in michelson interferometer are particularly heavy
Will.It is and equal for the fiber optic hydrophone unit of traditional form, the mode of environment and coiling residing for sensitive optical fibre and reference optical fiber
Slightly difference, the response of sensitive arm and reference arm for temperature change tend not to synchronization, cause the phase difference of two-arm with temperature
Change is related to produce irregular drift, and then is difficult to ensure that reliability and the degree of accuracy of demodulation result.
The content of the invention
It is an object of the invention to overcome the above-mentioned deficiency of prior art, there is provided a kind of symmetrical expression mandrel of resisting temperature drift
Type fiber optic hydrophone unit, the sensitive optical fibre and reference optical fiber of hydrophone probe have formal symmetry and environmentally
Uniformity, so as to which in extraneous temperature changing process, the phase difference of sensitive optical fibre and reference optical fiber can remain constant.
What the above-mentioned purpose of the present invention was mainly achieved by following technical solution：
A kind of symmetrical expression bobbin-type fiber optic hydrophone unit of resisting temperature drift, including sensing assembly, reference component and light
Fine watertight connector, the sensing assembly are connected with reference component, and wherein sensing assembly includes sensitive wall and sensitive optical fibre, with reference to group
Part includes reference section skeleton and reference optical fiber, and sensitive wall is identical with the external diameter of reference section skeleton, and the sensitive optical fibre is wrapped in quick
It is connected on sense wall and with optical fiber watertight connector, the reference optical fiber is wrapped on reference section skeleton and connected with optical fiber watertight connector
Connect, and the length of sensitive optical fibre winding is identical with the length that reference optical fiber is wound.
In the symmetrical expression bobbin-type fiber optic hydrophone unit of above-mentioned resisting temperature drift, the sensing assembly also includes sensitivity
Portion's end cap and sensitive portion's skeleton, the reference component also includes reference section sleeve and reference section end cap, wherein sensitive wall is sleeved on
On sensitive portion's skeleton, sensitive portion's end cap is connected with sensitive portion's skeleton, for fixing sensitive wall；Reference section skeleton and sensitive portion's skeleton
Connection, on reference section skeleton, reference section end cap is connected reference section sleeve set with reference section skeleton, optical fiber watertight connector and ginseng
Examine portion's end cap connection.
In the symmetrical expression bobbin-type fiber optic hydrophone unit of above-mentioned resisting temperature drift, the sensing assembly also includes enhanced sensitivity
Coating, the enhanced sensitivity coating are coated in sensitive optical fibre surface；The thickness of the enhanced sensitivity coating is 2-4mm.
In the symmetrical expression bobbin-type fiber optic hydrophone unit of above-mentioned resisting temperature drift, the sensitive wall is sleeved on sensitive portion
The annular enhanced sensitivity gas back of the body is formed on skeleton, the radius of the annular enhanced sensitivity gas back of the body is sensitive wall inner surface radius 1/20~1/15, if
Sensitive wall inner surface radius is R1, and sensitive portion's skeleton appearance radius surface is R2, and the radius of the annular enhanced sensitivity gas back of the body is r, then r=R1-
R2。
In the symmetrical expression bobbin-type fiber optic hydrophone unit of above-mentioned resisting temperature drift, the sensitive optical fibre is in 15g~20g
Wind around sensitive wall outer surface under pretightning force, sensitive wall both ends set bulge-structure (, the sensitive optical fibre of winding is risen spacing
Effect.
In the symmetrical expression bobbin-type fiber optic hydrophone unit of above-mentioned resisting temperature drift, the reference component also includes second
Sealing ring, the reference section skeleton outer surface open up first annular seal groove, the reference section sleeve interior surface close to end
The second annular seal groove is opened up close to end, second sealing ring is arranged on first annular seal groove and the second ring packing
In groove, assembling sealing is collectively forming.
In the symmetrical expression bobbin-type fiber optic hydrophone unit of above-mentioned resisting temperature drift, the reference component also includes first
Sealing ring, the 3rd seal groove is opened up on an end face of the reference section sleeve, is opened on an end face of the reference section end cap
If the 4th seal groove, after reference section sleeve docks with reference section end cap, the first sealing ring is arranged on the 3rd seal groove and the 4th close
In sealing groove, assembling sealing is collectively forming.
In the symmetrical expression bobbin-type fiber optic hydrophone unit of above-mentioned resisting temperature drift, the is opened up on sensitive portion's skeleton
One die ontology fine hole, the second die ontology fine hole and the 3rd die ontology fine hole are opened up on the reference section skeleton, and inside is provided with cavity, and the second die ontology fine hole
Connected respectively with cavity with the 3rd die ontology fine hole；The sensitive optical fibre passes through cavity and light by the first die ontology fine hole, the second die ontology fine hole
Fine watertight connector connection, the reference optical fiber pass through the 3rd die ontology fine hole, are connected by cavity with optical fiber watertight connector.
In the symmetrical expression bobbin-type fiber optic hydrophone unit of above-mentioned resisting temperature drift, the reference optical fiber is in 15g~20g
Reference section skeleton outer surface is wound around under pretightning force, reference section skeleton both ends set bulge-structure, to the reference light of winding
Fibre plays position-limiting action.
In the symmetrical expression bobbin-type fiber optic hydrophone unit of above-mentioned resisting temperature drift, the reference section skeleton is convex at both ends
Length vertically between structure is played, it is identical with length of the sensitive wall between the bulge-structure of both ends vertically.
In the symmetrical expression bobbin-type fiber optic hydrophone unit of above-mentioned resisting temperature drift, the reference component also includes fastening
Screw, the trip bolt pass through the through hole opened up on reference section end cap, and the screwed hole with being opened up on reference section skeleton end face is consolidated
Fixed connection.
In the symmetrical expression bobbin-type fiber optic hydrophone unit of above-mentioned resisting temperature drift, the enhanced sensitivity coating is polyurethane bullet
Property material；First circular seal ring and the second circular seal ring are water proof rubber material.
In the symmetrical expression bobbin-type fiber optic hydrophone unit of above-mentioned resisting temperature drift, sensitive portion's end cap, sensitive portion
Skeleton, sensitive wall, reference section skeleton, reference section sleeve, reference section end cap and optical fiber watertight connector are stainless steel material.
In the symmetrical expression bobbin-type fiber optic hydrophone unit of above-mentioned resisting temperature drift, the sensitive optical fibre and reference optical fiber
For polarization maintaining optical fibre；The wall thickness of the sensitive wall is 0.4~0.8mm.
The present invention has the advantages that compared with prior art：
(1), the present invention carries out innovative design to fiber optic hydrophone unit structure so that fiber optic hydrophone unit is on the whole
Symmetrical expression bobbin-type sonde configuration, wherein reference section skeleton and sensitive thin-walled have identical characteristic size, and right vertically
Claim, when variation of ambient temperature, it is ensured that be wrapped in reference optical fiber on reference section skeleton and be wrapped on sensitive thin-walled
Sensitive optical fibre length change amount is equal, so as to ensure the constant phase difference of the two, fibre optic hydrophone of the present invention and prior art phase
Than, overcome the defects of demodulated signal is easily influenceed by variation of ambient temperature, significantly improve fibre optic hydrophone reliability and
Accuracy of measurement.
(2), symmetrical expression bobbin-type fiber optic hydrophone unit of the present invention, will by the ingehious design to structure and building block
Sensitive optical fibre and reference optical fiber are encapsulated in identical environment, and the sensitive optical fibre and reference optical fiber for making hydrophone probe have form
On symmetry and uniformity environmentally, ensure the two uniformity to temperature-responsive, so as in extraneous temperature changing process
In, the phase difference of sensitive optical fibre and reference optical fiber can remain constant.
(3), symmetrical expression bobbin-type fiber optic hydrophone unit of the present invention, realizes pair on sensitive optical fibre and reference optical fiber structure
Title property, ambient temperature change causes the two length change identical, so as to remain that sensitive optical fibre and reference optical fiber are constant
Phase difference, it is ensured that the reliability of demodulation result and the degree of accuracy.
(4), symmetrical expression bobbin-type fiber optic hydrophone unit of the present invention, solves hydrophone temperature drift from structure design
The problem of, so as to reduce the difficulty of back-end algorithm and software development.
(5), symmetrical expression bobbin-type fiber optic hydrophone unit of the present invention, can effectively solve hydrophone demodulation phase with temperature
Irregular drifting problem caused by change, be advantageous to the engineer applied that hydrophone carries out large scale array formula, have stronger
Practicality；
(6), planform and size ratio of the present invention by lot of experiments to each building block of fiber optic hydrophone unit
Design is optimized in example relation etc. so that fiber optic hydrophone unit performance is optimal, and further increases fibre optic hydrophone
Reliability and accuracy of measurement.
Brief description of the drawings
Fig. 1 is the installation diagram of the symmetrical expression bobbin-type fiber optic hydrophone unit of resisting temperature of the present invention drift；
Fig. 2 is the symmetrical expression bobbin-type fiber optic hydrophone unit explosive view of resisting temperature of the present invention drift；
Fig. 3 is the symmetrical expression bobbin-type fiber optic hydrophone unit outside drawing of resisting temperature of the present invention drift；
Fig. 4 is sensitive optical fibre coiling part assembly drawing of the present invention；
Fig. 5 is the sensitive wall construction schematic diagram of the present invention；
Fig. 6 is reference section skeleton schematic diagram of the present invention；
Fig. 7 is reference section skeleton cross-sectional view of the present invention；
Fig. 8 is reference section skeleton direction view of the present invention；
Fig. 9 is reference section sleeve cross-sectional view of the present invention.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings：
The installation diagram of the symmetrical expression bobbin-type fiber optic hydrophone unit to be drifted about as shown in Figure 1 for resisting temperature of the present invention；Fig. 2 institutes
The symmetrical expression bobbin-type fiber optic hydrophone unit explosive view of resisting temperature drift of the present invention is shown as, optical fiber water of the present invention is listened as seen from the figure
Device probe includes sensing assembly, reference component and optical fiber watertight connector 10, and wherein sensing assembly includes sensitive portion's end cap 1, sensitivity
Portion's skeleton 2, sensitive wall 3, sensitive optical fibre 4 and enhanced sensitivity coating 5, reference component include reference section skeleton 6, reference optical fiber 7, reference section
Sleeve 8, reference section end cap 9, trip bolt 11, the first sealing ring 12 and the second sealing ring 13.Wherein sensitive wall 3 and reference section bone
The external diameter of frame 6 is identical.As shown in figure 3, the symmetrical expression bobbin-type fiber optic hydrophone unit dress of resisting temperature drift is proposed for the present invention
Outside drawing after matching somebody with somebody.
Sensitive optical fibre coiling part assembly drawing of the present invention is illustrated in figure 4, Fig. 5 show the sensitive wall construction signal of the present invention
Figure, as seen from the figure, sensitive wall 3, which is sleeved on sensitive portion's skeleton 2, forms the annular enhanced sensitivity gas back of the body 21, and sensitive portion's end cap 1 passes through screw thread
Couple with sensitive portion's skeleton 2, play a part of fixed sensitive wall 3.Sensitive optical fibre 4 is wound around under 15g~20g pretightning forces
The sensitive surface of wall 3, bulge-structure 31 of the sensitive wall 3 close to both ends play spacing effect during sensitive optical fibre 4 is wound.
After the coiling of sensitive optical fibre 4, in its surface even application enhanced sensitivity coating 5, while enhanced sensitivity coating 5 plays sensitization,
There is certain protective effect to sensitive optical fibre 4, the thickness of enhanced sensitivity coating 5 is 2-4mm.In addition also opened up on sensitive portion's skeleton 2
First die ontology fine hole 22.Bulge-structure 31 is segmentation circular-arc structure, is symmetrically distributed on sensitive wall 3.
The radius of the annular enhanced sensitivity gas back of the body 21 is the sensitive inner surface radius 1/20~1/15 of wall 3, if the inner surface radius of sensitive wall 3
For R1, the sensitive appearance radius surface of portion's skeleton 2 is R2, and the radius of the annular enhanced sensitivity gas back of the body 21 is r, then r=R1-R2.
Reference section skeleton schematic diagram of the present invention is illustrated in figure 6, Fig. 7 show reference section skeleton cross-section structure of the present invention and shown
It is intended to, reference optical fiber 7 winds around the surface of reference section skeleton 6, reference section skeleton 6 under 15g~20g pretightning forces as seen from the figure
The upper bulge-structure 61 close to both ends plays spacing effect during reference optical fiber 7 is wound.The one end of reference section skeleton 6
Stud is connected by screw thread with sensitive portion's skeleton 2, and screwed hole is opened up on the end face of the other end of reference section skeleton 6 as shown in Figure 6
64, reference section sleeve 8 is sleeved on reference section skeleton 6.
The outer surface of reference section skeleton 6 opens up first annular seal groove 63 close to end, and the inner surface of reference section sleeve 8 is close
End opens up the second annular seal groove 81 to match, and the second sealing ring 13 is arranged on the first annular ring of seal groove 63 and second
In shape seal groove 81, assembling sealing is collectively forming.
As shown in Fig. 2 the 3rd seal groove 82 is opened up on an end face of reference section sleeve 8, an end of reference section end cap 9
The 4th seal groove 92 to match is opened up on face, will using trip bolt 11 after reference section sleeve 8 docks with reference section end cap 9
Reference section end cap 9 is installed at the screwed hole 64 of reference section skeleton 6, and the first sealing ring 12 is arranged on the 3rd seal groove 82 and the 4th
In seal groove 92, assembling sealing is collectively forming.
The first die ontology fine hole 22 is opened up on sensitive portion's skeleton 2, it is excessively fine that the second die ontology fine hole 62 and the 3rd is opened up on reference section skeleton 6
Hole 65, inside is provided with cavity 66, and the second die ontology fine hole 62 and the 3rd die ontology fine hole 65 connect with cavity 66 respectively.Sensitive optical fibre 4 passes through
The first die ontology fine hole 22, the second die ontology fine hole 62 are crossed, is connected by cavity 66 with optical fiber watertight connector 10, reference optical fiber 7 passes through the 3rd
Die ontology fine hole 65, it is connected by cavity 66 with optical fiber watertight connector 10.Sensitive optical fibre 4 is wrapped in the length on sensitive wall 3 in the present invention
Degree is identical with the length that reference optical fiber 7 is wrapped on reference section skeleton 6.Optical fiber watertight connector 10 passes through spiral shell with reference section end cap 9
Line is tightly connected.Preferred reference section 6 length between both ends bulge-structure 61 vertically of skeleton in the present invention, with sensitive wall 3
Length between both ends bulge-structure 31 vertically is identical.
Enhanced sensitivity coating 5 is polyurethane elastomeric materials.
Sensitive portion's end cap 1, sensitive portion's skeleton 2, sensitive wall 3, reference section skeleton 6, reference section sleeve 8, reference section end cap 9,
Optical fiber watertight connector 10, trip bolt 11 are stainless steel material.
First circular seal ring 12 and the second circular seal ring 13 are waterproof long-life elastomeric material.
Sensitive optical fibre 4 and the polarization maintaining optical fibre that reference optical fiber 7 is 125 μm of specifications of Φ in the present embodiment.The wall thickness of sensitive wall 3 is
0.4~0.8mm, it is 0.5mm in the present embodiment.
The present invention has identical characteristic size by the ingehious design reference section skeleton of structure and sensitive thin-walled, and
And it is axially symmetric, when variation of ambient temperature, it is ensured that be wrapped in reference optical fiber on reference section skeleton and be wrapped in quick
The sensitive optical fibre length change amount felt on thin-walled is equal, so as to ensure the constant phase difference of the two.Fibre optic hydrophone of the present invention with
Prior art is compared, and overcomes the defects of demodulated signal is easily influenceed by variation of ambient temperature, and improve fibre optic hydrophone can
By property and accuracy of measurement.
It is described above, it is only an embodiment of the invention, but protection scope of the present invention is not limited thereto, and is appointed
What those familiar with the art the invention discloses technical scope in, the change or replacement that can readily occur in, all
It should be included within the scope of the present invention.
Unspecified part of the present invention belongs to general knowledge as well known to those skilled in the art.
Claims (14)
- A kind of 1. symmetrical expression bobbin-type fiber optic hydrophone unit of resisting temperature drift, it is characterised in that：Including sensing assembly, reference Component and optical fiber watertight connector (10), the sensing assembly are connected with reference component, wherein sensing assembly including sensitive wall (3) and Sensitive optical fibre (4), reference component include reference section skeleton (6) and reference optical fiber (7), sensitive wall (3) and reference section skeleton (6) External diameter is identical, and the sensitive optical fibre (4) is wrapped on sensitive wall (3) and is connected with optical fiber watertight connector (10), the reference light Fine (7) are wrapped on reference section skeleton (6) and be connecteds with optical fiber watertight connector (10), and the length of sensitive optical fibre (4) winding and The length of reference optical fiber (7) winding is identical.
- 2. fiber optic hydrophone unit according to claim 1, it is characterised in that：The sensing assembly also includes sensitive portion end Lid (1) and sensitive portion's skeleton (2), the reference component also include reference section sleeve (8) and reference section end cap (9), wherein sensitive Wall (3) is sleeved on sensitive portion's skeleton (2), and sensitive portion's end cap (1) is connected with sensitive portion's skeleton (2), for fixing sensitive wall (3)；Reference section skeleton (6) is connected with sensitive portion's skeleton (2), and reference section sleeve (8) is sleeved on reference section skeleton (6), reference Portion's end cap (9) is connected with reference section skeleton (6), and optical fiber watertight connector (10) is connected with reference section end cap (9).
- 3. fiber optic hydrophone unit according to claim 2, it is characterised in that：The sensing assembly also includes enhanced sensitivity coating (5), the enhanced sensitivity coating (5) is coated in sensitive optical fibre (4) surface；The thickness of the enhanced sensitivity coating (5) is 2-4mm.
- 4. fiber optic hydrophone unit according to claim 2, it is characterised in that：The sensitive wall (3) is sleeved on sensitive portion The annular enhanced sensitivity gas back of the body (21) is formed on skeleton (2), the radius of the annular enhanced sensitivity gas back of the body (21) is sensitive wall (3) inner surface radius 1/20~1/15, if sensitive wall (3) inner surface radius is R1, sensitive portion's skeleton (2) appearance radius surface is R2, the annular enhanced sensitivity gas back of the body (21) radius is r, then r=R1-R2.
- 5. fiber optic hydrophone unit according to claim 2, it is characterised in that：The sensitive optical fibre (4) is in 15g~20g Sensitive wall (3) outer surface is wound around under pretightning force, sensitive wall (3) both ends set bulge-structure (31), to the sensitivity of winding Optical fiber (4) plays position-limiting action.
- 6. fiber optic hydrophone unit according to claim 2, it is characterised in that：The reference component also includes the second sealing Enclose (13), reference section skeleton (6) outer surface opens up first annular seal groove (63), the reference section sleeve close to end (8) inner surface opens up the second annular seal groove (81) close to end, and second sealing ring (13) is arranged on first annular close Sealing groove (63) is with the second annular seal groove (81), being collectively forming assembling sealing.
- 7. fiber optic hydrophone unit according to claim 2, it is characterised in that：The reference component also includes the first sealing Enclose (12), open up the 3rd seal groove (82) on an end face of the reference section sleeve (8), the one of the reference section end cap (9) The 4th seal groove (92) is opened up on individual end face, after reference section sleeve (8) docks with reference section end cap (9), the first sealing ring (12) The 3rd seal groove (82) is arranged on in the 4th seal groove (92), being collectively forming assembling sealing.
- 8. the fiber optic hydrophone unit according to one of claim 1~7, it is characterised in that：On sensitive portion's skeleton (2) The first die ontology fine hole (22) is opened up, the second die ontology fine hole (62) and the 3rd die ontology fine hole (65) are opened up on the reference section skeleton (6), it is internal Provided with cavity (66), and the second die ontology fine hole (62) and the 3rd die ontology fine hole (65) connect with cavity (66) respectively；The sensitive optical fibre (4) by the first die ontology fine hole (22), the second die ontology fine hole (62), it is connected by cavity (66) with optical fiber watertight connector (10), it is described Reference optical fiber (7) passes through the 3rd die ontology fine hole (65), is connected by cavity (66) with optical fiber watertight connector (10).
- 9. the fiber optic hydrophone unit according to one of claim 1~7, it is characterised in that：The reference optical fiber (7) exists Reference section skeleton (6) outer surface is wound around under 15g~20g pretightning forces, reference section skeleton (6) both ends set bulge-structure (61) position-limiting action, is played to the reference optical fiber (7) of winding.
- 10. fiber optic hydrophone unit according to claim 9, it is characterised in that：The reference section skeleton (6) is convex at both ends Length vertically between structure (61) is played, it is identical with length of the sensitive wall (3) between both ends bulge-structure (31) vertically.
- 11. the fiber optic hydrophone unit according to one of claim 2~7, it is characterised in that：The reference component also includes Trip bolt (11), the trip bolt (11) pass through the through hole opened up on reference section end cap (9), are held with reference section skeleton (6) The screwed hole (64) opened up on face is fixedly connected.
- 12. the fiber optic hydrophone unit according to one of claim 2~7, it is characterised in that：The enhanced sensitivity coating (5) is Polyurethane elastomeric materials；First circular seal ring (12) and the second circular seal ring (13) are water proof rubber material.
- 13. the fiber optic hydrophone unit according to one of claim 2~7, it is characterised in that：Sensitive portion's end cap (1), Sensitive portion's skeleton (2), sensitive wall (3), reference section skeleton (6), reference section sleeve (8), reference section end cap (9) and optical fiber watertight connect Head (10) is stainless steel material.
- 14. the fiber optic hydrophone unit according to one of claim 1~7, it is characterised in that：The sensitive optical fibre (4) and Reference optical fiber (7) is polarization maintaining optical fibre；The wall thickness of the sensitive wall (3) is 0.4~0.8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710712116.1A CN107677357A (en) | 2017-08-18 | 2017-08-18 | A kind of symmetrical expression bobbin-type fiber optic hydrophone unit of resisting temperature drift |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710712116.1A CN107677357A (en) | 2017-08-18 | 2017-08-18 | A kind of symmetrical expression bobbin-type fiber optic hydrophone unit of resisting temperature drift |
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| Publication Number | Publication Date |
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| CN107677357A true CN107677357A (en) | 2018-02-09 |
Family
ID=61134683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710712116.1A Pending CN107677357A (en) | 2017-08-18 | 2017-08-18 | A kind of symmetrical expression bobbin-type fiber optic hydrophone unit of resisting temperature drift |
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| Country | Link |
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| CN (1) | CN107677357A (en) |
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| CN108709895A (en) * | 2018-08-16 | 2018-10-26 | 昆仑杰信（北京）科技有限责任公司长沙分公司 | A kind of optical fiber acoustic detection probe for leakage monitoring system |
| 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 |
| CN113124992A (en) * | 2021-04-21 | 2021-07-16 | 长沙军民先进技术研究有限公司 | Portable photoelectric conversion integrated optical fiber hydrophone and test system thereof |
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| CN113124992A (en) * | 2021-04-21 | 2021-07-16 | 长沙军民先进技术研究有限公司 | Portable photoelectric conversion integrated optical fiber hydrophone and test system thereof |
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Application publication date: 20180209 |