CN205785494U - A kind of distributed optical fiber vibration sensing device with broadband response - Google Patents
A kind of distributed optical fiber vibration sensing device with broadband response Download PDFInfo
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- CN205785494U CN205785494U CN201620447303.2U CN201620447303U CN205785494U CN 205785494 U CN205785494 U CN 205785494U CN 201620447303 U CN201620447303 U CN 201620447303U CN 205785494 U CN205785494 U CN 205785494U
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- 238000012545 processing Methods 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
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Abstract
This utility model discloses a kind of distributed optical fiber vibration sensing device with broadband response, can be with precise positioning and the distributed optical fiber vibration sensing device with broadband response with broadband response and operational approach, not only detection range is long, detection is simple, registration to oscillation point, and there is the widest frequency response.This utility model accurately to vibration location near sensor fibre, and can have the advantage that broadband responds.
Description
Technical field
This utility model relates to sensory field of optic fibre, and particularly relating to one can be with precise positioning and have wideband
The distributed optical fiber vibration sensing field of rate response.
Background technology
Optical fiber vibration sensing have highly sensitive, anti-electromagnetic interference capability is strong, dynamic range is big, terminal structure
Simply, good concealment, the feature that corrosion-resistant, environmental suitability is strong, can be used for that heavy construction is on-the-spot and weight
Big politics, economy, the circumference security protection in military base.Therefore, research distributed optical fiber sensing system is one
There is very much the problem of application prospect and practical significance.
At present, optical time domain reflection technology based on phase sensitiveDistributed optical fiber vibration sensing
System has vibration registration, and detection range is long, detects simple feature, but its principle limits
Its frequency response to vibration.And although vibration sensing system based on interference of light principle has the widest frequency to ring
Should, but the most extremely complex to the location in oscillation point, and position also inaccuracy.
Utility model content
Technical problem to be solved in the utility model be realize one can be with precise positioning and have broadband
The distributed optical fiber vibration sensing device with broadband response of response, not only detection range is long, detection letter
Single, the registration to oscillation point, and there is the widest frequency response.
To achieve these goals, the technical solution adopted in the utility model is: one has broadband response
Distributed optical fiber vibration sensing device, pulse laser module output pulse laser is to the input of first annular device
End, an output port of described first annular device connects the input port of the second circulator through EDFA, another
Individual output port connects an input port of the first bonder, and the light splitting end of described first bonder connects biography
Photosensitive fine one end, the other end of described sensor fibre connects the second coupling, and one of described second circulator defeated
Going out port and connect the first Fiber Bragg Grating FBG, another output port connects through the first data acquisition module
Data processing module, laser instrument connects described second bonder through optoisolator, described second bonder
One light splitting end connects the first bonder, and the return terminal of the second bonder connects the input port of the 3rd circulator,
One output port of described 3rd circulator connects the second Fiber Bragg Grating FBG, and another outfan is made a slip of the tongue
Second data acquisition module connects data processing module.
The narrow linewidth pulse laser of the described pulse laser a length of 1550nm of module transmitted wave.
Described laser emission wavelength is the continuous laser of 1310nm.
Described first Fiber Bragg Grating FBG reflection kernel wavelength is 1550nm, and the second Fiber Bragg Grating FBG is anti-
Hit a length of 1310nm of cardiac wave.
Described first bonder is 1:99 bonder, and described second bonder is three-dB coupler.
The utility model has the advantage of accurately to vibration location near sensor fibre, and can have width
Frequency response.
Accompanying drawing explanation
Labelling in the content expressed every width accompanying drawing in this utility model description below and figure is briefly described:
Fig. 1 is the distributed optical fiber vibration sensing apparatus structure schematic diagram with broadband response；
Labelling in above-mentioned figure is: 1, pulse laser module；2, the first circulator；3、EDFA；4, second
Circulator；5, the first Fiber Bragg Grating FBG；6, the first data acquisition module；7, the first data process mould
Block；8, the first bonder；9, sensor fibre；10, laser instrument；11, optoisolator；12, the second coupling
Clutch；13, the 3rd circulator；14, the second Fiber Bragg Grating FBG；15, the second data acquisition module.
Detailed description of the invention
This utility model has the distributed optical fiber vibration sensing device of broadband response as it is shown in figure 1, include
Pulse laser module the 1, first circulator 2, EDFA3 (erbium-doped fiber amplifier), the second circulator 4,
One Fiber Bragg Grating FBG the 5, first data acquisition module the 6, first data processing module the 7, first bonder
8, sensor fibre 9, laser instrument 10, optoisolator the 11, second bonder 12, the 3rd circulator 13,
Two Fiber Bragg Grating FBG 14 and the second data acquisition modules 15.
Pulse laser module 1 connects the port 1 of the first circulator 2, and the port 3 of the first circulator 2 passes through
EDFA3 connects the port 1 of the second circulator 4, and the port 2 of the second circulator 4 connects the first optical fiber Bragg
Grating 5 (FBG), the port 3 of the second circulator 4 connects data through the first data acquisition module 6 and processes mould
Block, the port 2 of the first circulator 2 connects the first bonder 8, and 99% light splitting end of the first bonder 8 connects
Sensor fibre 9, the other end of sensor fibre 9 connects the second bonder 12, and laser instrument 10 is through optoisolator
11 connect the second bonder 12, and a light splitting end of the second bonder 12 connects the first bonder 8, the second coupling
The return terminal of clutch 12 connects the port 1 of the 3rd circulator 13, and the port 2 of the 3rd circulator 13 connects FBG2,
The port 3 of the 3rd circulator 13 connects data processing module through the second data acquisition module 15.
The above-mentioned distributed optical fiber vibration sensing device with broadband response can be with precise positioning and have width
Frequency response, not only detection range is long, and detection is simple, the registration to oscillation point, and has the widest
Frequency response.
In order to improve device effect further, pulse laser module 1 preferably employs a length of 1550nm's of transmitted wave
Narrow linewidth pulse laser, laser instrument 10 preferably employs the continuous laser of a length of 1310nm of transmitted wave, the first light
Fine Bragg grating 5 reflection kernel wavelength is 1550nm, the second Fiber Bragg Grating FBG 14 reflection kernel wavelength
For 1310nm.First bonder 8 is 1:99 bonder, and the second bonder 12 is three-dB coupler.
Operational approach of the present utility model is as follows:
Open and regulate pulse laser module 1 send pulse signal and drive the first data acquisition module 61 to gather
Signal, i.e. pulse laser module 1 emission pulse laser enter sensor fibre 9 and produce backward Rayleigh scattering, warp
After first data acquisition module 6 gathers data, the data processing module signal to collecting is according to based on phase place
Sensitive optical time domain reflection principle analysis i.e. can get vibration position near sensor fibre 9.
Opening and regulate laser instrument 10 and send continuous laser, the second data acquisition module 15 gathers signal, number
Carrying out fast fourier transform (FFT) according to the processing module signal to collecting, i.e. to can get sensor fibre 9 attached
The frequency information of nearly vibration.
Above in conjunction with accompanying drawing, this utility model is exemplarily described, it is clear that this utility model implements
It is not subject to the restrictions described above, as long as have employed method of the present utility model design and technical scheme is carried out
The improvement of various unsubstantialities, or the most improved design of the present utility model and technical scheme are directly applied to
Other occasion, all within protection domain of the present utility model.
Claims (5)
1. a distributed optical fiber vibration sensing device with broadband response, it is characterised in that: pulse swashs
The input of optical module output pulse laser extremely first annular device, an output port of described first annular device
Connect the input port of the second circulator through EDFA, another output port connect the first bonder one is defeated
Inbound port, the light splitting end of described first bonder connects sensor fibre one end, the other end of described sensor fibre
Connecting the second coupling, an output port of described second circulator connects the first Fiber Bragg Grating FBG, separately
One output port connects data processing module through the first data acquisition module, and laser instrument is through optoisolator
Connecting described second bonder, a light splitting end of described second bonder connects the first bonder, the second coupling
The return terminal of clutch connects the input port of the 3rd circulator, and an output port of described 3rd circulator is even
Connect the second Fiber Bragg Grating FBG, another outfan make a slip of the tongue second data acquisition module connect data process mould
Block.
The distributed optical fiber vibration sensing device with broadband response the most according to claim 1, its
It is characterised by: the narrow linewidth pulse laser of the described pulse laser a length of 1550nm of module transmitted wave.
The distributed optical fiber vibration sensing device with broadband response the most according to claim 1, its
It is characterised by: described laser emission wavelength is the continuous laser of 1310nm.
The distributed optical fiber vibration sensing device with broadband response the most according to claim 1, its
It is characterised by: described first Fiber Bragg Grating FBG reflection kernel wavelength is 1550nm, the second optical fiber Bragg
Optical grating reflection centre wavelength is 1310nm.
The distributed optical fiber vibration sensing device with broadband response the most according to claim 1, its
Being characterised by: described first bonder is 1:99 bonder, described second bonder is three-dB coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620447303.2U CN205785494U (en) | 2016-05-17 | 2016-05-17 | A kind of distributed optical fiber vibration sensing device with broadband response |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620447303.2U CN205785494U (en) | 2016-05-17 | 2016-05-17 | A kind of distributed optical fiber vibration sensing device with broadband response |
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| Publication Number | Publication Date |
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| CN205785494U true CN205785494U (en) | 2016-12-07 |
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| CN201620447303.2U Expired - Fee Related CN205785494U (en) | 2016-05-17 | 2016-05-17 | A kind of distributed optical fiber vibration sensing device with broadband response |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758512A (en) * | 2016-05-17 | 2016-07-13 | 安徽师范大学 | Distributed optical fiber vibration sensing device with wide-frequency responses and operation method thereof |
-
2016
- 2016-05-17 CN CN201620447303.2U patent/CN205785494U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758512A (en) * | 2016-05-17 | 2016-07-13 | 安徽师范大学 | Distributed optical fiber vibration sensing device with wide-frequency responses and operation method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20190517 |
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| CF01 | Termination of patent right due to non-payment of annual fee |