CN104215318A - Novel packaging structure for fiber optic hydrophone probe and fiber optic hydrophone array - Google Patents
Novel packaging structure for fiber optic hydrophone probe and fiber optic hydrophone array Download PDFInfo
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- CN104215318A CN104215318A CN201410429034.2A CN201410429034A CN104215318A CN 104215318 A CN104215318 A CN 104215318A CN 201410429034 A CN201410429034 A CN 201410429034A CN 104215318 A CN104215318 A CN 104215318A
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- 229920002396 Polyurea Polymers 0.000 claims abstract description 16
- 239000013307 optical fiber Substances 0.000 claims description 45
- 238000001514 detection method Methods 0.000 claims description 30
- 230000003287 optical effect Effects 0.000 claims description 27
- 150000001875 compounds Chemical class 0.000 claims description 12
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- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000002161 passivation Methods 0.000 claims description 3
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 18
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- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
A novel packaging structure for a fiber optic hydrophone probe and a fiber optic hydrophone array comprise an outer shell, polyurea composite material, an armored cable, a pressure plate connector, a transition connecting sleeve, a Kevlar rope, an acoustic sensor and the like. The outer shell is packaged under pressure through the acoustic sensor with pressure resistance and sound transmission of the probe considered; the polyurea composite material is watertight packaging material with excellent hydrophobic and sound transmission properties; the armored cable is used for connecting and packaging when a plurality of probes form an array and fibers among the probes are protected with good watertight and mechanical properties. Both ends of the acoustic sensor are connected with the armored cable through the pressure plate connector; an external sleeve of the pressure plate connector is sealed through a transition connected sleeve; a plurality of fixing holes are formed on the connected sleeve to fix the Kevlar rope and improve tensile strength of an arraying probe cable. Compared with the prior art, the packaging structure has high structural reliability, good water tightness and strong deepwater pressure capacity. Furthermore, engineering and mass assembly are easy to realize.
Description
Technical field
The invention belongs to sensory field of optic fibre, relate to a kind of novel optical fiber nautical receiving set probe encapsulating structure and Scale Fiber-Optic Hydrophone Array.
Background technology
Up to now, sound wave remains the most effective carrier at water medium and long distance transmission information.Fibre optic hydrophone is a kind of new type water acoustic signal sensor got up based on optical fiber, optronics technique development, and it has important application in military and civilian field.In military field, it is the core component of ASW sonar; At civil area, it can be used as seismic event detection, oil seismic exploration, the locating fish etc.Compared with conventional piezoelectric nautical receiving set, it has, and sound pressure sensitivity is high, bandwidth, electromagnetism interference, adverse environment resistant, light structure, under water passive, be easy to remote measurement and easily become the advantages such as large scale array.
Fibre optic hydrophone can be divided into interfere type, intensive properties, grating type etc., and wherein interfere type scheme is progressively full-fledged.The probe of interfere type scheme is mainly based on Michelson interferometer principle: the laser sent by laser instrument is divided into two-way through coupling mechanism, and wherein a road forms pickup arm, reception sound wave modulation, and another road forms reference arm, provides fixed phase.Two-beam backspace coupling mechanism after catoptron reflection interferes, and the light signal of interference is converted into electric signal through photodetector, just can pick up the information of sound wave through signal transacting.
The effect of fiber optic hydrophone unit in Practical Project and many-sided factor closely bound up, wherein encapsulating structure is one of key factor affecting final performance.Whether encapsulating structure is reasonable, will directly affect the detection sensitivity of probe, the operability of group battle array, the serviceable life of connection reliability and detection array.
Fiber optic hydrophone unit encapsulation general is at present as follows with stranding mode: sonic transducer is strung by some Kev stay cords, and optical fiber is freely placed between sonic transducer; Outside detection cable, from first to last cover has a complete PU rubber hose, as protection packaging and water tight enclosure.Between sonic transducer, place a nylon support frame every a segment distance, in case PU rubber tube is flattened by hydraulic pressure.Pour into liquid light wax oil between PU rubber tube and sonic transducer, guarantee importing into of acoustical signal.
This packaged type exposes many problems in practical engineering application, such as:
PU rubber tube quality is soft, and process of deployment is easily scratched by pointed structures part, or under water by biological damage; In order to easy for installation, the external diameter of sonic transducer is less than the internal diameter of PU rubber tube, causes sonic transducer to be in floating state in rubber tube, cannot produce be connected reliably with encapsulating structure; Light wax oil is fluid, and thermal expansivity is large, often can the phenomenon of fiber detection cable " bulge " between storage period; Kev stay cord is merely able to bear pulling force, and the optical fiber between sonic transducer is not protected reliably, and encapsulation process is fragile; The anti-deep water hydraulic pressure of PU rubber tube and light wax oil is indifferent, along with the increase of laying the degree of depth can cause detection sensitivity to reduce fast; Stranding needs first sonic transducer to be assembled into battle array, then overlaps outer PU rubber tube, and operating process is complicated, and occupied ground space is large;
Therefore the encapsulating structure and the stranding mode that more reliably, are easier to assembling are urgent problems in current engineering process.
Summary of the invention
Technology of the present invention is dealt with problems: overcome the deficiencies in the prior art, a kind of novel optical fiber nautical receiving set probe encapsulating structure and Scale Fiber-Optic Hydrophone Array are provided, reduce encapsulating structure to the impact of probe detection sensitivity, more efficiently watertightness performance is provided simultaneously, deep water overpressure resistant performance, and connection reliability during Multi probe group battle array stranding and operability.
Technical solution of the present invention is:
A kind of novel optical fiber nautical receiving set probe encapsulating structure, comprising: shell, polyureas compound substance, armored optical cable, pressing plate joint, transition adapter sleeve, Kev stay cord, sonic transducer and optical fiber;
Sonic transducer is hollow tubular, its two ends are fixedly connected with armored optical cable respectively by pressing plate joint, the steel wire of armored optical cable termination is pressed on pressing plate joint inside, the outer cover of pressing plate joint has transition adapter sleeve, polyureas compound substance is smeared at the two ends of transition adapter sleeve, for being sealed the junction of sonic transducer and armored optical cable; Optical fiber passes from the armored optical cable of sonic transducer side, is wrapped on the sensitive structure in the outside of sonic transducer, passes afterwards from the armored optical cable of sonic transducer opposite side;
There is the flange of protrusion one end of transition adapter sleeve, several fixed orifices uniform on this flange, and Kev stay cord is passed and fixed by fixed orifice and flange from the fixed orifice described flange;
Outside sonic transducer, cover has shell, and the sidewall of shell has multiple sound penetrating hole, and the fill gaps polyureas compound substance between sonic transducer and shell is used for sonic transducer to seal.
Described sonic transducer is interference type optical fiber hydrophone.
The aperture of described sound penetrating hole is 1.6 ~ 2mm, entrant sound rate >95%.
Described shell adopts 316L stainless steel and through Passivation Treatment, wall thickness 0.5 ~ 1mm.
Fill gaps polyureas thickness of composite material 0.5 ~ 1mm between described sonic transducer and shell.
The described Scale Fiber-Optic Hydrophone Array realized based on encapsulating structure, is characterized in that comprising: many nautical receiving set detections cable, main cable and multiple connector boxs, and every bar nautical receiving set detection cable all has multiple probe encapsulating structure; Kev stay cord successively through the fixed orifice on flange in each probe encapsulating structure on nautical receiving set detection cable, and is fixed by fixed orifice and flange; On every bar nautical receiving set detection cable, every four probe encapsulating structures are one group, distribute an optical fiber, this optical fiber is identical with the type of attachment of four sonic transducers in encapsulating structure of popping one's head in this group, be Optical Fiber Winding on the sensitive structure in the outside of sonic transducer, this optical fiber by this group four probe encapsulating structure after, optical fiber directly from be arranged in this group probe encapsulating structure after all probe encapsulating structures sonic transducer inside pass, be connected in main cable eventually through connector box.
The quantity of encapsulating structure that described every bar nautical receiving set detection cable is popped one's head in is 4n, n is positive integer.
The invention solves existing PU rubber tube encapsulation scheme Problems existing in engineer applied, its advantage is:
Stainless steel casing, armored optical cable, transition adapter sleeve are combined into the outer enclosure of detection cable, can avoid the scuffing of the procedures of establishment, prevent halobiontic destruction; The mode that sonic transducer and encapsulating structure all adopt securing member to be connected, strength of joint is reliable and stable; The material that encapsulating structure uses is all solid, good stability, is convenient to store; Optical fiber between sonic transducer, through armouring umbilical center, can be protected reliably; Shell have employed stainless steel material, can bear most hydraulic pressure, prevents the sensitivity of hydraulic pressure to sonic transducer from having an impact; Cabling process can realize installing probe encapsulating structure step by step, and assembling mode is controlled flexibly, and occupied ground space is little.
Accompanying drawing explanation
Fig. 1 is nautical receiving set list of the present invention probe encapsulating structure cut-open view;
Fig. 2 is nautical receiving set list of the present invention probe encapsulating structure explosive view;
Fig. 3 is nautical receiving set Multi probe group battle array stranding schematic diagram of the present invention;
Fig. 4 is hydrophone array schematic diagram of the present invention.
Embodiment
As shown in Figure 1 and Figure 2, the invention provides novel optical fiber nautical receiving set probe encapsulating structure, comprising: shell 101, polyureas compound substance 102, armored optical cable 103, pressing plate joint 104, transition adapter sleeve 105, Kev stay cord 106, sonic transducer 201 and optical fiber 202;
Sonic transducer 201 is hollow tubular, is interference type optical fiber hydrophone.Its two ends are fixedly connected with armored optical cable 103 respectively by pressing plate joint 104, and the steel wire of armored optical cable 103 termination is pressed on pressing plate joint 104 inside, and connected mode has certain physical strength.The outer cover of pressing plate joint 104 has transition adapter sleeve 105, is designed to streamlined moulding, reduces resistance when pulling in water.Polyureas compound substance 102 is smeared at the two ends of transition adapter sleeve 105, for being sealed the junction of sonic transducer 201 with armored optical cable 103.Optical fiber 202 passes from the armored optical cable 103 of sonic transducer 201 side, the sensitive structure being wrapped in the outside of sonic transducer 201 detects underwater sound signal, passes afterwards from the armored optical cable 103 of sonic transducer 201 opposite side.Armored optical cable 103 serves the effect of protection to the optical fiber 202 between probe.
There is the flange of protrusion one end of transition adapter sleeve 105, several fixed orifices uniform on this flange, and Kev stay cord 106 is passed and fixed by fixed orifice and flange from the fixed orifice described flange, improves the resistance to tension of detection cable.
Outside sonic transducer 201, cover has shell 101, materials'use 316L stainless steel, for sonic transducer 201 provides protection, bears deep water hydraulic pressure; The sidewall of shell 101 has multiple sound penetrating hole, and the aperture of described sound penetrating hole is 1.6 ~ 2mm, makes it mate with the Characteristic impedance of water, entrant sound rate >95%.Fill gaps polyureas compound substance 102 between sonic transducer 201 and shell 101 is for sealing sonic transducer 201, and its acoustic impedance and water matched well, watertightness is good, and water-intake rate and water permeability are extremely low, and long service life.
According to encapsulating structure provided by the invention, can form Scale Fiber-Optic Hydrophone Array, as shown in Figure 4, comprise: many nautical receiving set detections cable, main cable and multiple connector boxs, as shown in Figure 3, A representative probe encapsulating structure in figure, B represents connector box, and C represents main fiber.Every bar nautical receiving set detection cable all there is multiple probe encapsulating structure; Kev stay cord 106 successively through the fixed orifice on flange in each probe encapsulating structure on nautical receiving set detection cable, and is fixed by fixed orifice and flange.Due to the process technology limit of the optical coupler in sonic transducer 201, do and be merely able to accomplish that four probes share an optical fiber more, therefore on every bar nautical receiving set detection cable, every four probe encapsulating structures are one group, distribute an optical fiber 202, this optical fiber 202 is identical with the type of attachment of four sonic transducers 201 in encapsulating structure of popping one's head in this group, is optical fiber 202 and is wrapped on the sensitive structure in the outside of sonic transducer 201.This optical fiber 202 is by after this group four probe encapsulating structure, and cannot pop one's head in by responsive other, directly from all probe encapsulating structures be arranged in after this group probe encapsulating structure, sonic transducer 201 inside is passed, and is connected in main cable eventually through connector box again.The quantity of encapsulating structure that every bar nautical receiving set detection cable is popped one's head in is 4n, n is positive integer.
The premiere feature of nautical receiving set probe encapsulating structure is for the sonic transducer of inside provides protection, prevents from letting slip journey or halobiontic destruction, and tolerance deep water hydraulic pressure.For preventing the shell of thin-walled flexing unstability under the effect of working depth hydraulic pressure from flattening, wall thickness δ, the radius R of shell, must to meet the following conditions between length L and hydraulic pressure P:
Wherein E is the Young modulus of material, and μ is Poisson ratio.
Encapsulating structure also will ensure sound translative performance while shielding, and guarantees the detection sensitivity of popping one's head in.Known, sound wave can be expressed as through the reflection coefficient of different medium sound intensity on interface:
Wherein z
1, z
2be respectively the Characteristic impedance of two media, and the Characteristic impedance of propagation medium can be represented by following formula:
z
mat＝ρc
Wherein ρ is Media density, and c is the velocity of sound in medium.
From formula, two media Characteristic impedance is coupling more, and acoustic reflection is less, and this is also commonly use the reason of rubber tube as the outer enclosure of nautical receiving set at present.Owing to present invention uses the shell of stainless steel, its Characteristic impedance does not mate with water, and therefore in order to strengthen the transmission capacity of the underwater sound, need on protecting sheathing, open some entrant sound apertures, bore size needs to be optimized design, to mate the acoustic impedance of box hat.Have the steel plate acoustic impedance of N number of aperture by following formulae discovery:
Wherein ρ is the density of medium, and η is the coefficient of viscosity of medium, and d is the diameter of micropore.
Below in conjunction with specific embodiment, introduce nautical receiving set of the present invention probe encapsulating structure and Scale Fiber-Optic Hydrophone Array in detail.
A kind of nautical receiving set probe encapsulating structure, sonic transducer employs interference type optical fiber hydrophone.Its two ends are fixedly connected with armored optical cable respectively by the stainless pressing plate joint of 316L.Armored optical cable uses light-duty steel band armored optical cable, and innermost layer is that line steel band cable core is pricked in chromium plating, and mechanical property is excellent.Optical fiber between probe passes armored optical cable center and is filled with fiber optic protection ointment, for optical fiber provides reliable protection.The parallel reinforcement steel wire of armored optical cable enclosed inside two, makes the anti-torsion performance of optical cable stronger, can bear the pulling force of 1500N, and the steel wire of termination is pressed on pressing plate joint inside, and fixed form is reliable and stable.
The outer cover of pressing plate joint is similarly the stainless transition adapter sleeve of 316L, is designed to streamlined moulding, reduces the resistance in water.There is the flange of protrusion one end of transition adapter sleeve, uniform four fixed orifices on this flange, and Kev stay cord is passed and fixed by fixed orifice and flange from the fixed orifice described flange.The wire diameter of described Kev stay cord is 0.5mm, and sub-thread can bear the pulling force of >50kg, for detection cable provides the tensile strength of more than 200kg.
Outside sonic transducer, cover has shell, adopts 316L stainless steel material through Defend salt fog Passivation Treatment, the deep water hydraulic pressure (30MPa) of wall thickness 1mm, the maximum 3000M born.On shell, rotational symmetry processes 5 groups of sound penetrating holes, sound penetrating hole aperture 1.6mm, emulates entrant sound rate >95% as calculated.
The two ends of the space after having assembled between sonic transducer and shell and transition adapter sleeve are filled polyureas compound substance and are sealed.Polyurea layer thickness 0.5mm between sonic transducer and shell.Use the polyureas compound substance of bi-component, density of material 1.09g/cm
3, velocity of sound 1470m/s, acoustic impedance and water matched well.Set time 30min, tensile strength >10MPa, breaking elongation >450%.Functional with metal adhesion, adhesion >13.7MPa.
According to above encapsulating structure, composition Scale Fiber-Optic Hydrophone Array.In order to detect the underwater sound signal of about 100Hz, every bar nautical receiving set detection cable has 128 encapsulating structures of popping one's head in, and interval 8m arranges probe encapsulating structure, every root detection cable total length 1km; Kev stay cord successively through the fixed orifice on flange in each probe encapsulating structure on nautical receiving set detection cable, and is fixed by fixed orifice and flange.Due to the process technology limit of the coupling mechanism in sonic transducer, on every bar nautical receiving set detection cable, every four probe encapsulating structures are one group, distribute an optical fiber.This optical fiber is after responsive this group four probe, and cannot pop one's head in by responsive other, directly from all probe encapsulating structures be arranged in after this group probe encapsulating structure, sonic transducer inside is passed, and is connected in main cable eventually through connector box again.
The content be not described in detail in instructions of the present invention belongs to the known technology of those skilled in the art.
Claims (7)
1. a novel optical fiber nautical receiving set probe encapsulating structure, is characterized in that comprising: shell (101), polyureas compound substance (102), armored optical cable (103), pressing plate joint (104), transition adapter sleeve (105), Kev stay cord (106), sonic transducer (201) and optical fiber (202);
Sonic transducer (201) is hollow tubular, its two ends are fixedly connected with armored optical cable (103) respectively by pressing plate joint (104), the steel wire of armored optical cable (103) termination is pressed on pressing plate joint (104) inside, the outer cover of pressing plate joint (104) has transition adapter sleeve (105), polyureas compound substance (102) is smeared at the two ends of transition adapter sleeve (105), for being sealed the junction of sonic transducer (201) with armored optical cable (103); Optical fiber (202) passes from the armored optical cable (103) of sonic transducer (201) side, be wrapped on the sensitive structure in the outside of sonic transducer (201), pass from the armored optical cable (103) of sonic transducer (201) opposite side afterwards;
There is the flange of protrusion one end of transition adapter sleeve (105), several fixed orifices uniform on this flange, and Kev stay cord (106) is passed and fixed by fixed orifice and flange from the fixed orifice described flange;
Sonic transducer (201) outside cover has shell (101), the sidewall of shell (101) has multiple sound penetrating hole, and the fill gaps polyureas compound substance (102) between sonic transducer (201) and shell (101) is for sealing sonic transducer (201).
2. a kind of novel optical fiber nautical receiving set probe encapsulating structure according to claim 1, is characterized in that: described sonic transducer (201) is interference type optical fiber hydrophone.
3. a kind of novel optical fiber nautical receiving set probe encapsulating structure according to claim 1, is characterized in that: the aperture of described sound penetrating hole is 1.6 ~ 2mm, entrant sound rate >95%.
4. a kind of novel optical fiber nautical receiving set probe encapsulating structure according to claim 1, is characterized in that: described shell (1) adopts 316L stainless steel and through Passivation Treatment, wall thickness 0.5 ~ 1mm.
5. a kind of novel optical fiber nautical receiving set probe encapsulating structure according to claim 1, it is characterized in that: the fill gaps polyureas compound substance (102) between described sonic transducer (201) and shell (101), thickness 0.5 ~ 1mm.
6. based on the Scale Fiber-Optic Hydrophone Array that claim 1 realizes, it is characterized in that comprising: many nautical receiving set detections cable, main cable and multiple connector boxs, every bar nautical receiving set detection cable all has multiple probe encapsulating structure, Kev stay cord (106) successively through the fixed orifice on flange in each probe encapsulating structure on nautical receiving set detection cable, and is fixed by fixed orifice and flange, on every bar nautical receiving set detection cable, every four probe encapsulating structures are one group, distribute an optical fiber (202), this optical fiber (202) is identical with the type of attachment of four sonic transducers (201) in encapsulating structure of popping one's head in this group, being optical fiber (202) is wrapped on the sensitive structure in the outside of sonic transducer (201), this optical fiber (202) is after encapsulating structure of being popped one's head in by this group four, the direct all probe encapsulating structures from being arranged in after this group probe encapsulating structure of optical fiber (202), sonic transducer (201) inside is passed, be connected in main cable eventually through connector box.
7. a kind of novel optical fiber nautical receiving set probe encapsulating structure according to claim 6, is characterized in that: the quantity of encapsulating structure that every bar nautical receiving set detection cable is popped one's head in is 4n, n is positive integer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410429034.2A CN104215318B (en) | 2014-08-27 | Novel optical fiber hydrophone probe packaging structure and optical fiber hydrophone array |
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|---|---|---|---|
| CN201410429034.2A CN104215318B (en) | 2014-08-27 | Novel optical fiber hydrophone probe packaging structure and optical fiber hydrophone array |
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| CN104215318A true CN104215318A (en) | 2014-12-17 |
| CN104215318B CN104215318B (en) | 2017-01-04 |
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| CN105628169A (en) * | 2015-12-28 | 2016-06-01 | 中国科学院半导体研究所 | Fiber-optic hydrophone system based on distributed optical fiber sound sensing technology |
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| CN106546971A (en) * | 2016-10-21 | 2017-03-29 | 长沙湘计海盾科技有限公司 | A kind of solid-state towed sonar linear array and its assembly method |
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| CN108627236A (en) * | 2018-03-29 | 2018-10-09 | 北京航天控制仪器研究所 | A kind of silicon substrate diaphragm type fiber laser hydrophone |
| CN108769870A (en) * | 2018-08-20 | 2018-11-06 | 海鹰企业集团有限责任公司 | A kind of fixing means of fixing device and hydrophone in battle array cable |
| CN109060105A (en) * | 2018-07-10 | 2018-12-21 | 湖北文索光电科技有限公司 | A kind of fermat spiral optical fiber ring structured novel hydrophone probe |
| CN109765561A (en) * | 2019-01-29 | 2019-05-17 | 武汉普惠海洋光电技术有限公司 | Fibre optic hydrophone battle array segment structure and Scale Fiber-Optic Hydrophone Array structure |
| CN109814216A (en) * | 2019-02-20 | 2019-05-28 | 海鹰企业集团有限责任公司 | A kind of fibre optic hydrophone tail optical fiber deriving structure |
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| CN105628169A (en) * | 2015-12-28 | 2016-06-01 | 中国科学院半导体研究所 | Fiber-optic hydrophone system based on distributed optical fiber sound sensing technology |
| CN106289501B (en) * | 2016-08-01 | 2019-04-09 | 北京航天控制仪器研究所 | A kind of heterodyne method fibre optic hydrophone reference probe encapsulating structure |
| CN106289501A (en) * | 2016-08-01 | 2017-01-04 | 北京航天控制仪器研究所 | A kind of heterodyne method fibre optic hydrophone reference probe encapsulating structure |
| CN106546971A (en) * | 2016-10-21 | 2017-03-29 | 长沙湘计海盾科技有限公司 | A kind of solid-state towed sonar linear array and its assembly method |
| CN106646381A (en) * | 2016-11-17 | 2017-05-10 | 北京航天控制仪器研究所 | All fiber towed array |
| CN106646381B (en) * | 2016-11-17 | 2019-05-24 | 北京航天控制仪器研究所 | A kind of all -fiber towed array |
| CN106772329A (en) * | 2016-12-21 | 2017-05-31 | 中国船舶重工集团公司第七〇五研究所 | A kind of hydrophone array array structure based on fiber grating F P interferometers |
| CN107702786A (en) * | 2017-08-31 | 2018-02-16 | 北京航天控制仪器研究所 | A kind of interference formula fiber optic hydrophone unit for array |
| CN108627236A (en) * | 2018-03-29 | 2018-10-09 | 北京航天控制仪器研究所 | A kind of silicon substrate diaphragm type fiber laser hydrophone |
| CN109060105A (en) * | 2018-07-10 | 2018-12-21 | 湖北文索光电科技有限公司 | A kind of fermat spiral optical fiber ring structured novel hydrophone probe |
| CN108769870A (en) * | 2018-08-20 | 2018-11-06 | 海鹰企业集团有限责任公司 | A kind of fixing means of fixing device and hydrophone in battle array cable |
| CN109765561A (en) * | 2019-01-29 | 2019-05-17 | 武汉普惠海洋光电技术有限公司 | Fibre optic hydrophone battle array segment structure and Scale Fiber-Optic Hydrophone Array structure |
| CN109814216A (en) * | 2019-02-20 | 2019-05-28 | 海鹰企业集团有限责任公司 | A kind of fibre optic hydrophone tail optical fiber deriving structure |
| CN110557707A (en) * | 2019-09-16 | 2019-12-10 | 中国科学院半导体研究所 | Core shaft push-pull type grooved optical fiber microphone |
| 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 |
| 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 |
| CN111947766A (en) * | 2020-07-17 | 2020-11-17 | 武汉普惠海洋光电技术有限公司 | Deep-sea high-sensitivity optical fiber hydrophone |
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