CN106289502A - A kind of trivector hydrophone based on distributed feedback optical fiber laser and phase demodulating method - Google Patents
A kind of trivector hydrophone based on distributed feedback optical fiber laser and phase demodulating method Download PDFInfo
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- CN106289502A CN106289502A CN201610657868.8A CN201610657868A CN106289502A CN 106289502 A CN106289502 A CN 106289502A CN 201610657868 A CN201610657868 A CN 201610657868A CN 106289502 A CN106289502 A CN 106289502A
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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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Abstract
The present invention relates to a kind of trivector hydrophone based on distributed feedback optical fiber laser and phase demodulating method, including optical fibre grating acceleration sensing unit, mass, hydrophone shell, being fixed with six roots of sensation optical fibre grating acceleration sensing unit by three-dimensional orthogonal mode in described hydrophone shell, the optical fibre grating acceleration sensing unit in each dimension is fixed on hydrophone shell wall by retainer ring with end cap；Described mass one is hollow, the hexahedro mass offering six through holes respectively, and is positioned at the center of hydrophone shell, and each optical fibre grating acceleration sensing unit is drawn from the through hole of mass with the Active Optical Fiber grating of fiber skeleton end；Described hydrophone shell uses duralumin material to be made, and the seam crossing of hydrophone shell uses O to seal, and with light unit from hydrophone fiber.The present invention has low frequency, high sensitivity, the advantage such as pressure, provides technical foundation for fields such as underwater monitoring system, underwater sound sonar equipment and underwater information nets.
Description
Technical field
The invention belongs to underwater sound technical field of optical fiber sensing, particularly relate to a kind of based on distributed feedback optical fiber laser
Trivector hydrophone and phase demodulating method.
Background technology
Vector hydrophone is generally made up of three-dimensional acceleration transducer and pressure hydrophone, can synchronization gain sound field under water
In vector scalar information, there is suppression isotropic noise, eliminate the advantage such as port and starboard ambiguity.Active phase shifting type is used to mix
As sensing element, erbium fiber grating (hereinafter referred to as Active Optical Fiber grating) has that capacity of resisting disturbance is strong, green end without power supply, easily
In plurality of advantages such as large-scale network-estabilishings.So, with Active Optical Fiber grating directly as the trivector hydrophone of sensing element,
Through becoming one of important development direction of a new generation's Underwater Detection technology and equipment.
The core sensing element of Active Optical Fiber grating vector hydrophone is the distribution that λ/4 phase shifting type erbium-doped nonlinear fiber grating is constituted
Feedback light fibre laser.Owing to this active phase-shifted fiber grating exists live width at its reflection peak 1550nm it is megahertz
The arrowband transmission peaks of magnitude, the laser of output narrow linewidth is shaken by the distributed feedback laserresonator being made up of this phase-shifted grating
Swing.Owing to this narrow-linewidth laser has extremely long coherence length, demodulated interferential instrument can be made still to keep good under bigger optical path difference
Good signal to noise ratio.Meanwhile, Active Optical Fiber grating passes through time division multiplex and wavelength-division multiplex technique, can realize an optical fiber multiplexing multiple
Primitive senses.
Summary of the invention
It is an object of the invention to the deficiency overcoming prior art to exist, and provide a kind of and swash based on distributed feedback optical fiber
The trivector hydrophone of light device and phase demodulating method, have low frequency, high sensitivity, the advantage such as pressure, for underwater monitoring system
The fields such as system, underwater sound sonar equipment and underwater information net provide important technical foundation.
It is an object of the invention to complete by following technical solution, including optical fibre grating acceleration sensing unit, matter
Gauge block, hydrophone shell, be fixed with six roots of sensation optical fibre grating acceleration by three-dimensional orthogonal mode in described hydrophone shell and pass
Sense unit, the optical fibre grating acceleration sensing unit in each dimension is fixed on hydrophone shell wall by retainer ring with end cap；Institute
The mass stated one is hollow, the hexahedro mass offering six through holes respectively, and is positioned at the center of hydrophone shell, respectively
Individual optical fibre grating acceleration sensing unit is drawn from the through hole of mass with the Active Optical Fiber grating of fiber skeleton end；Described water
Listening device shell to use duralumin material to be made, the seam crossing of hydrophone shell uses O to seal, and listens from water with light unit
Device fiber.
As preferably, described optical fibre grating acceleration sensing unit is by end cap, sensitive housing, fiber skeleton, active light
Fine grating composition, wherein end cap, fiber skeleton manufacture material therefor are metal material, and it is organic that sensitive housing manufactures material therefor
Material, the two ends of Active Optical Fiber grating are separately fixed on the corresponding bonded structure of end cap and fiber skeleton, at this fiber skeleton
End face is provided with and overlaps at the fiber carrying out protecting with pine sheath and fiber protection.
A kind of phase demodulating method utilizing trivector hydrophone described above, the method includes the following: the pump of 980nm
Source, Pu sends pumping light, through isolator, then the 980nm port input optical fibre grating acceleration through 980/1550 wavelength division multiplexer
Active Optical Fiber grating in degree sensing unit, the Active Optical Fiber grating in this optical fibre grating acceleration sensing unit produces after pumping
The narrow-linewidth laser of raw 1550nm, returns to wavelength division multiplexer along reverse transfers, is entered by the 1550nm port of wavelength division multiplexer
Isolator, then through erbium-doped fiber amplifier enter nonequilibrium Michelson's interferometer, interferometer by 2 × 2 bonders,
Time delay optical fiber, two faraday rotation mirror compositions, finally enter photodetector, demodulated in optical signal by PGC method
Phase place changes, and then can cause the acoustical signal of Active Optical Fiber grating strain.
The invention have the benefit that 1), use the program vector hydrophone there is the feature that low frequency sensitivity is high, water
The acceleration sensitivity listening device axial when 100Hz is more than 40dB ref.1rad/g, is folded to equivalent sound pressure spirit during 100Hz
Sensitivity is-165dB ref.1rad/uPa；2), realize three-dimensional vector detection, time-division multiplex technology can be used to combine active light
Fine grating pressure hydrophone uses；3), using metal shell and watertight to process, hydrophone has the spies such as pressure, seawater corrosion resistance
Point, reliability is high.
Accompanying drawing explanation
Fig. 1 is the Active Optical Fiber grating acceleration sensing cellular construction figure of the present invention.
Fig. 2 is the Active Optical Fiber grating vector hydrophone structure figure of the present invention.
Fig. 3 is the Active Optical Fiber raster phase demodulating system conceptual scheme of the present invention.
Label in accompanying drawing is respectively as follows: 10, sensitive housing；11, fiber skeleton；12, end cap；13, mass；14, fixing
Ring；15, O；16, hydrophone shell；17, light unit；18, Active Optical Fiber grating；19, at fiber；20, pumping source；21, every
From device；22, wavelength-division multiplex；23, optical fibre grating acceleration sensing unit；24, fiber amplifier；25, bonder；26, time delay light
Fine；27, faraday rotation mirror；28, photodetector.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention done detailed introduction: as shown in accompanying drawing 1,2, the present invention includes that fiber grating adds
Velocity pick-up unit 23, mass 13, hydrophone shell 16, fixed by three-dimensional orthogonal mode in described hydrophone shell 16
Having six roots of sensation optical fibre grating acceleration sensing unit 23, the optical fibre grating acceleration sensing unit 23 in each dimension passes through solid with end cap 12
Determine ring 14 to be fixed on hydrophone shell 16 wall；Described mass 13 1 hollow, hexahedro offer six through holes respectively
Mass, and be positioned at the center of hydrophone shell 16, each optical fibre grating acceleration sensing unit 23 is with fiber skeleton 11 end
Active Optical Fiber grating 18 draw from the through hole of mass 13；Under axial acceleration effect, the sensitive housing 10 on both sides will be handed over
For there is symmetrical stretching and compressive deformation, driving Active Optical Fiber grating to produce strain, thus changing the wavelength of its output light.Institute
The hydrophone shell 16 stated uses duralumin material to be made, and the seam crossing of hydrophone shell 16 uses O 15 to seal, and with
Light unit 17 is from hydrophone fiber.
Described optical fibre grating acceleration sensing unit 23 is by end cap 12, sensitive housing 10, fiber skeleton 11, Active Optical Fiber
Grating 18 forms, and wherein end cap 12, fiber skeleton 11 manufacture material therefor is metal material, and sensitive housing 10 manufactures material therefor
For organic material, produce axial deformation by housing 10 sensitive under direction of vibration effect, cause 18, Active Optical Fiber grating
Raw strain thus sense, the two ends of Active Optical Fiber grating 18 are separately fixed at the most bonding of end cap 12 and fiber skeleton 11
In structure, this fiber skeleton 11 end face is provided with and carries out at the fiber protected 19 with pine sheath and fiber protection set.
As shown in Figure 3, the phase demodulating method of the trivector hydrophone of the present invention includes the following: the pumping of 980nm
Source 20 sends pumping light, through isolator 21, then the 980nm port input optical fibre grating through 980/1550 wavelength division multiplexer 22
Active Optical Fiber grating 18 in acceleration sensing unit 23, the Active Optical Fiber grating in this optical fibre grating acceleration sensing unit 23
18 narrow-linewidth lasers producing 1550nm after pumping, return to wavelength division multiplexer 22 along reverse transfers, by wavelength division multiplexer 22
1550nm port enter isolator 21, then enter nonequilibrium Michelson's interferometer through erbium-doped fiber amplifier 24, dry
Interferometer is by 2 × 2 bonders 25, time delay optical fiber 26, and two faraday rotation mirrors 27 form, and finally enter photodetector
28, demodulate the phase place in optical signal by PGC method and change, and then the acoustical signal of Active Optical Fiber grating strain can be caused.
Light phase change is represented by with the relation of fiber grating strain:
Δφ(λB)=4.9nd ε/λB
From formula, the sensitivity of Active Optical Fiber grating sensing system and axial strain size ε, non-equilibrium interferometer
Optical path difference nd is all directly proportional.
The development process of the trivector hydrophone of the present invention is as follows:
(1) first, by Active Optical Fiber grating 18 through end cap 12, the one end in grid region is placed in the adhesive spots of end cap 12, point
Heat-curable glue adds heat fixation, by end cap 12 with sensitive housing 10, sensitive housing 10 is bonding with epoxy glue with fiber skeleton 11 and twists
Fastening, the other end of Active Optical Fiber grating 18 is drawn from fiber skeleton 11.
(2) after epoxy glue solidifies, optical fibre grating acceleration sensing unit 23 is placed on heated jig, utilizes the most flat
Moving stage applies pretension to Active Optical Fiber grating 18；After applying pretension, then by another end points thermosetting of Active Optical Fiber grating 18
Changing and gluing be connected to fiber skeleton 11 abutting edge, tail optical fiber protects set to carry out protection process with 0.6mm pine sheath and fiber.
(3) optical fibre grating acceleration sensing unit 23 of good performance after test is bonded and fixed to mass with epoxy glue
On 13, tail optical fiber is drawn from mass 13, and by three-dimension sensor construction packages in hydrophone shell 16, hydrophone shell 16 connects
O 15 mode watertight is all used to process at seam, with light unit 17 fiber from hydrophone.
It is understood that it will be understood by those skilled in the art that to technical scheme and inventive concept in addition etc.
The protection domain of appended claims of the invention all should be belonged to replacement or change.
Claims (3)
1. a trivector hydrophone based on distributed feedback optical fiber laser, including optical fibre grating acceleration sensing unit
(23), mass (13), hydrophone shell (16), it is characterised in that: pass through three-dimensional orthogonal in described hydrophone shell (16)
Mode is fixed with six roots of sensation optical fibre grating acceleration sensing unit (23), the optical fibre grating acceleration sensing unit (23) in each dimension with
End cap (12) is fixed on hydrophone shell (16) wall by retainer ring (14)；Described mass (13) one hollow, six
Face offers the mass of six through holes respectively, and is positioned at the center of hydrophone shell (16), and each optical fibre grating acceleration passes
The Active Optical Fiber grating (18) that sense unit (23) is held with fiber skeleton (11) is drawn from the through hole of mass (13)；Described water is listened
Device shell (16) uses duralumin material to be made, and the seam crossing of hydrophone shell (16) uses O (15) to seal, and with light
Unit (17) is from hydrophone fiber.
Trivector hydrophone based on distributed feedback optical fiber laser the most according to claim 1, it is characterised in that:
Described optical fibre grating acceleration sensing unit (23) is by end cap (12), sensitive housing (10), fiber skeleton (11), Active Optical Fiber
Grating (18) forms, and wherein end cap (12), fiber skeleton (11) manufacture material therefor are metal material, and sensitive housing (10) manufactures
Material therefor is organic material, and the two ends of Active Optical Fiber grating (18) are separately fixed at end cap (12) and the phase of fiber skeleton (11)
Answer on bonded structure, this fiber skeleton (11) end face is provided with and overlaps at the fiber carrying out protecting with pine sheath and fiber protection
(19)。
3. the phase place using trivector hydrophone based on distributed feedback optical fiber laser as claimed in claim 1
Demodulation method, it is characterised in that: the method includes the following: the pumping source (20) of 980nm and sends pumping light, through isolator
(21), then in 980nm port input optical fibre grating acceleration sensing unit (23) of 980/1550 wavelength division multiplexer (22)
Active Optical Fiber grating (18), the Active Optical Fiber grating (18) in this optical fibre grating acceleration sensing unit (23) produces after pumping
The narrow-linewidth laser of raw 1550nm, returns to wavelength division multiplexer (22) along reverse transfers, by the 1550nm of wavelength division multiplexer (22)
Port enters isolator (21), then enters nonequilibrium Michelson's interferometer, interferometer through erbium-doped fiber amplifier (24)
By 2 × 2 bonder (25), time delay optical fiber (26), two faraday rotation mirror (27) compositions, finally enter photodetector
(28), demodulate the phase place in optical signal by PGC method and change, and then the sound of Active Optical Fiber grating strain can be caused to believe
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107255735A (en) * | 2017-06-27 | 2017-10-17 | 上海传输线研究所（中国电子科技集团公司第二十三研究所） | A kind of three-dimensional fiber acceleration transducer of anti-strong electromagnetic |
| CN107389978A (en) * | 2017-09-08 | 2017-11-24 | 北京大学 | A kind of weak reflective Bragg gratings accelerometer and its method for sensing |
| CN107884063A (en) * | 2017-12-28 | 2018-04-06 | 长沙深之瞳信息科技有限公司 | A kind of modular fiber optic vector hydrophone |
| CN107884062A (en) * | 2017-12-27 | 2018-04-06 | 盐城工学院 | A kind of three-dimensional micro- fiber-optic grating sensor that shakes having from temperature compensation characteristic |
| CN107907202A (en) * | 2017-10-27 | 2018-04-13 | 北京大学 | It is a kind of to realize common-mode noise from the optical fiber vector hydrophone and its method for sensing suppressed |
| CN107990971A (en) * | 2017-12-27 | 2018-05-04 | 长沙深之瞳信息科技有限公司 | A kind of three-dimensional differential optical fiber vector hydrophone |
| CN108332065A (en) * | 2018-04-12 | 2018-07-27 | 中国船舶重工集团公司第七〇五研究所 | The device and method of hydrophone monitoring and warning pipe leakage booster and damage from third-party |
| CN108344880A (en) * | 2018-02-13 | 2018-07-31 | 北京大学 | A kind of long Michelson fibre optic accelerometer of unequal arm and its method for sensing |
| CN108731789A (en) * | 2018-07-30 | 2018-11-02 | 中国海洋大学 | Underwater Detection device based on optical-electronic oscillator |
| CN109781242A (en) * | 2019-03-08 | 2019-05-21 | 京东方科技集团股份有限公司 | Hydrophone, hydrophone array and hydrophone system |
| CN109813416A (en) * | 2019-02-19 | 2019-05-28 | 中国人民解放军海军潜艇学院 | A kind of big depth synchronous vibration type vector hydrophone |
| CN110017786A (en) * | 2019-05-14 | 2019-07-16 | 中国计量大学 | A kind of highly sensitive three dimensional strain detection structure body based on fiber grating orthogonal space |
| CN110530282A (en) * | 2019-09-04 | 2019-12-03 | 苏州热工研究院有限公司 | Three spindle-type fiber grating strain measurement sensors of adjustable sensitivity |
| CN110806258A (en) * | 2019-11-12 | 2020-02-18 | 山东省科学院激光研究所 | Three-component fiber grating vibration sensor |
| 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 |
| CN111854922A (en) * | 2020-07-29 | 2020-10-30 | 中国人民解放军国防科技大学 | High-sensitivity one-dimensional plane cantilever beam type optical fiber sensor and three-dimensional vector hydrophone |
| CN112461351A (en) * | 2020-11-18 | 2021-03-09 | 上海船舶电子设备研究所(中国船舶重工集团公司第七二六研究所) | Miniaturized high-integration optical fiber vector hydrophone |
| CN114061731A (en) * | 2021-09-27 | 2022-02-18 | 北京自动化控制设备研究所 | Non-magnetic interference type optical fiber vector hydrophone |
| CN117053915A (en) * | 2023-09-14 | 2023-11-14 | 中国矿业大学(北京) | Three-component optical fiber sensing device based on distributed acoustic sensing and signal restoration method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101726354A (en) * | 2009-12-16 | 2010-06-09 | 中国科学院半导体研究所 | Optical fiber laser vector hydrophone |
| US20120093463A1 (en) * | 2009-05-29 | 2012-04-19 | Ixblue | Fiber bragg grating hydrophone comprising a diaphragm amplifier |
-
2016
- 2016-08-11 CN CN201610657868.8A patent/CN106289502B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120093463A1 (en) * | 2009-05-29 | 2012-04-19 | Ixblue | Fiber bragg grating hydrophone comprising a diaphragm amplifier |
| CN101726354A (en) * | 2009-12-16 | 2010-06-09 | 中国科学院半导体研究所 | Optical fiber laser vector hydrophone |
Non-Patent Citations (2)
| Title |
|---|
| 李东明 等: "高灵敏度加速度抵消型分布反馈有源光纤光栅水听器研究", 《中国激光》 * |
| 熊水东 等: "三维光纤矢量水听器实验研究", 《中国声学学会2005年青年学术会议[CYCA"05]论文集》 * |
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| CN107255735A (en) * | 2017-06-27 | 2017-10-17 | 上海传输线研究所（中国电子科技集团公司第二十三研究所） | A kind of three-dimensional fiber acceleration transducer of anti-strong electromagnetic |
| CN107389978A (en) * | 2017-09-08 | 2017-11-24 | 北京大学 | A kind of weak reflective Bragg gratings accelerometer and its method for sensing |
| CN107389978B (en) * | 2017-09-08 | 2020-02-11 | 北京大学 | Weak reflection Bragg grating accelerometer and sensing method thereof |
| CN107907202B (en) * | 2017-10-27 | 2019-09-13 | 北京大学 | It is a kind of to realize common-mode noise from the optical fiber vector hydrophone and its method for sensing inhibited |
| CN107907202A (en) * | 2017-10-27 | 2018-04-13 | 北京大学 | It is a kind of to realize common-mode noise from the optical fiber vector hydrophone and its method for sensing suppressed |
| CN107884062A (en) * | 2017-12-27 | 2018-04-06 | 盐城工学院 | A kind of three-dimensional micro- fiber-optic grating sensor that shakes having from temperature compensation characteristic |
| CN107990971A (en) * | 2017-12-27 | 2018-05-04 | 长沙深之瞳信息科技有限公司 | A kind of three-dimensional differential optical fiber vector hydrophone |
| CN107884062B (en) * | 2017-12-27 | 2024-04-26 | 盐城工学院 | Three-dimensional micro-vibration fiber bragg grating sensor with self-temperature compensation characteristic |
| CN107884063A (en) * | 2017-12-28 | 2018-04-06 | 长沙深之瞳信息科技有限公司 | A kind of modular fiber optic vector hydrophone |
| CN107884063B (en) * | 2017-12-28 | 2024-04-30 | 长沙深之瞳信息科技有限公司 | Combined optical fiber vector hydrophone |
| CN108344880B (en) * | 2018-02-13 | 2019-09-13 | 北京大学 | A kind of long Michelson fibre optic accelerometer of unequal arm and its method for sensing |
| CN108344880A (en) * | 2018-02-13 | 2018-07-31 | 北京大学 | A kind of long Michelson fibre optic accelerometer of unequal arm and its method for sensing |
| CN108332065A (en) * | 2018-04-12 | 2018-07-27 | 中国船舶重工集团公司第七〇五研究所 | The device and method of hydrophone monitoring and warning pipe leakage booster and damage from third-party |
| CN108731789A (en) * | 2018-07-30 | 2018-11-02 | 中国海洋大学 | Underwater Detection device based on optical-electronic oscillator |
| CN109813416A (en) * | 2019-02-19 | 2019-05-28 | 中国人民解放军海军潜艇学院 | A kind of big depth synchronous vibration type vector hydrophone |
| CN109781242A (en) * | 2019-03-08 | 2019-05-21 | 京东方科技集团股份有限公司 | Hydrophone, hydrophone array and hydrophone system |
| CN110017786A (en) * | 2019-05-14 | 2019-07-16 | 中国计量大学 | A kind of highly sensitive three dimensional strain detection structure body based on fiber grating orthogonal space |
| CN110017786B (en) * | 2019-05-14 | 2024-03-26 | 中国计量大学 | High-sensitivity three-dimensional strain detection structure based on fiber bragg grating spatial orthogonality |
| CN110530282A (en) * | 2019-09-04 | 2019-12-03 | 苏州热工研究院有限公司 | Three spindle-type fiber grating strain measurement sensors of adjustable sensitivity |
| CN110806258B (en) * | 2019-11-12 | 2022-06-28 | 山东省科学院激光研究所 | Three-component fiber grating vibration sensor |
| CN110806258A (en) * | 2019-11-12 | 2020-02-18 | 山东省科学院激光研究所 | Three-component fiber grating vibration sensor |
| 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 |
| 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 |
| CN111854922A (en) * | 2020-07-29 | 2020-10-30 | 中国人民解放军国防科技大学 | High-sensitivity one-dimensional plane cantilever beam type optical fiber sensor and three-dimensional vector hydrophone |
| CN112461351A (en) * | 2020-11-18 | 2021-03-09 | 上海船舶电子设备研究所(中国船舶重工集团公司第七二六研究所) | Miniaturized high-integration optical fiber vector hydrophone |
| CN114061731A (en) * | 2021-09-27 | 2022-02-18 | 北京自动化控制设备研究所 | Non-magnetic interference type optical fiber vector hydrophone |
| CN117053915A (en) * | 2023-09-14 | 2023-11-14 | 中国矿业大学(北京) | Three-component optical fiber sensing device based on distributed acoustic sensing and signal restoration method |
| CN117053915B (en) * | 2023-09-14 | 2024-04-02 | 中国矿业大学(北京) | Three-component optical fiber sensing device based on distributed acoustic sensing and signal restoration method |
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