CN109238532A - Pipeline stress analysis method and system based on optical fiber Brillouin scattering light - Google Patents
Pipeline stress analysis method and system based on optical fiber Brillouin scattering light Download PDFInfo
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- CN109238532A CN109238532A CN201810876607.4A CN201810876607A CN109238532A CN 109238532 A CN109238532 A CN 109238532A CN 201810876607 A CN201810876607 A CN 201810876607A CN 109238532 A CN109238532 A CN 109238532A
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 120
- 238000004458 analytical method Methods 0.000 title claims abstract description 64
- 230000003287 optical effect Effects 0.000 claims abstract description 104
- 230000001419 dependent effect Effects 0.000 claims abstract description 67
- 239000000835 fiber Substances 0.000 claims abstract description 65
- 238000012545 processing Methods 0.000 claims abstract description 48
- 230000005540 biological transmission Effects 0.000 claims abstract description 44
- 238000001514 detection method Methods 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 30
- 230000002159 abnormal effect Effects 0.000 claims abstract description 11
- 239000004744 fabric Substances 0.000 claims description 14
- 230000000644 propagated effect Effects 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 230000001960 triggered effect Effects 0.000 claims 1
- 230000035882 stress Effects 0.000 description 52
- 238000012544 monitoring process Methods 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 238000009434 installation Methods 0.000 description 5
- 230000007774 longterm Effects 0.000 description 5
- 239000011435 rock Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
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- 239000000523 sample Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 230000001568 sexual effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
- G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
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Abstract
The invention discloses a kind of pipeline stress analysis methods and system based on optical fiber Brillouin scattering light, wherein, the described method includes: the Brillouin scattering optical signal for the optical fiber that the detector detection being fixed on pipeline is fixed on pipeline, and the Brillouin scattering optical signal of acquisition is marked；The Brillouin scattering optical signal of label occurs to wireless data transmission terminal detector；The Brillouin scattering optical signal for receiving label is sent to data processing centre by wireless data transmission terminal；Data processing centre calculates the Brillouin shift and dependent variable of fiber optic point corresponding with label according to the Brillouin scattering optical signal of label；Data center carries out the analysis of pipeline stress according to the Brillouin shift and dependent variable that mark corresponding fiber optic point, and feeds back to management user for the pipeline stress come is analyzed.In embodiments of the present invention, it is analyzed by Brillouin shift to the optical fiber on pipeline and dependent variable, whether abnormal quick and precisely analyzes pipeline stress.
Description
Technical field
The present invention relates to pipeline abnormality detection technical field more particularly to a kind of pipelines based on optical fiber Brillouin scattering light
Stress analysis method and system.
Background technique
In today of urbanization high speed development, above ground structure is more and more, and underground installation is more and more intensive.Urban Underground
The quantity and scale of pipeline are increasing, and constitution state becomes increasingly complex.What underground piping is on earth, is seen at present, probably
Which can be demonstrated completely without city.The diversification of the embedded technique of the pipeline of underground, the embedded time is different, pipeline
Purposes is also not quite similar.Piping laying pass through place underground medium without parameter it is uneven and changeable etc..Urban Underground
The scale of pipe network is also constantly expanding, still, large quantities of drainage pipeline etc. because be laid with the time it is remote, reached one after another now or
Close to service life, in addition many pipelines do not reach the time limit used just as aging and leak, break the problems such as quick-fried；It is right
Environment causes the contamination accident that can not be estimated.
In the tube body internal force in existing pipeline and the detection in terms of stretcher strain there are extremely difficult, often because of pipeline
Buried underground and can not detect, and generate pipeline because the pipeline of buried underground may be because that underground mud layer collapses etc. at any time and draw
Deformation etc. is stretched, these often all can not detect that in time pipeline may occur at any time because of these using the prior art
Rupture or fracture, cause large effect.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, the present invention provides one kind to be scattered based on optical fiber Brillouin
The pipeline stress analysis method and system of light are divided by Brillouin shift to the optical fiber on pipeline and dependent variable
Whether abnormal analysis quick and precisely analyzes pipeline stress, to judge that pipeline whether there is rupture or risk of breakage, and will
Feed back to management user, so that risk existing for pipeline is handled in time.
In order to solve the above-mentioned technical problem, the embodiment of the invention provides a kind of pipelines based on optical fiber Brillouin scattering light
Stress analysis method, which comprises
The Brillouin scattering optical signal for the optical fiber that the detector detection being fixed on pipeline is fixed on pipeline, and to acquisition
Brillouin scattering optical signal be marked；
The Brillouin scattering optical signal of label occurs to wireless data transmission terminal the detector；The wireless data
The Brillouin scattering optical signal for receiving label is sent to data processing centre by transmission terminal；
The data processing centre calculates fiber optic point corresponding with label according to the Brillouin scattering optical signal of the label
Brillouin shift and dependent variable；
The data center carries out pipeline stress according to the Brillouin shift and dependent variable that mark corresponding fiber optic point
Analysis, and the pipeline stress come that analyzes is fed back into management user.
Optionally, before the method further include:
Wake up instruction is sent to the detector being fixed on pipeline, the detector responds wake up instruction, into spy
Survey state；
After the detector enters acquisition mode, emit laser beam to the one end for the optical fiber being fixed on pipeline.
Optionally, the Brillouin scattering optical signal of described pair of acquisition is marked, comprising:
It is marked according to Brillouin scattering optical signal of the number of detector itself to acquisition.
Optionally, the data processing centre calculates corresponding with label according to the Brillouin scattering optical signal of the label
The Brillouin shift and dependent variable of fiber optic point, comprising:
The data processing centre determines according to the label of the Brillouin scattering optical signal of the label and detects label
The detector of Brillouin scattering optical signal is at a distance from transmitting laser beam one end optical fiber；
Loss late, distance and the Brillouin scattering signal acquisition mark point pair propagated on the optical fiber according to laser beam
The Brillouin shift for the fiber optic point answered；
The Brillouin shift of the corresponding fiber optic point of mark point and the dependent variable linear relationship equation of optical fiber are constructed, optical fiber is obtained
Dependent variable.
Optionally, the strain linear relationship equation of the Brillouin shift and optical fiber of the corresponding fiber optic point of the building mark point
Are as follows:
Wherein, vBThe Brillouin shift for the optical fiber that (ε) is the dependent variable of optical fiber when being ε, vBIt (0) be the dependent variable of optical fiber is 0
When optical fiber Brillouin shift,For proportionality coefficient, the dependent variable of ε optical fiber.
Optionally, the data center according to the Brillouin shift and dependent variable that mark corresponding fiber optic point carry out pipeline by
Power state analysis, comprising:
The data center carries out analysis comparison to the Brillouin shift and dependent variable that mark corresponding fiber optic point, judges institute
It states and marks whether the Brillouin shift of corresponding fiber optic point and dependent variable are greater than preset threshold, if more than the label is then judged
The pipeline stress of corresponding fiber optic point is abnormal.
It is optionally, described that the pipeline stress come that analyzes is fed back into management user, comprising:
When judging the pipeline stress exception of the corresponding fiber optic point of the label, triggering pipeline stress exception
Exceptional instructions, and by the exceptional instructions to management user feedback.
In addition, the embodiment of the invention also provides a kind of pipeline stresses based on optical fiber Brillouin scattering light to analyze system
System, the system comprises:
Detecting module: the Brillouin scattering for the optical fiber that the detector detection for being fixed on pipeline is fixed on pipeline
Signal, and the Brillouin scattering optical signal of acquisition is marked；
Sending module: the Brillouin scattering optical signal of label was occurred to wireless data transmission end for the detector
End；The Brillouin scattering optical signal for receiving label is sent to data processing centre by the wireless data transmission terminal；
Computing module: it calculates and marks according to the Brillouin scattering optical signal of the label for the data processing centre
The Brillouin shift and dependent variable of corresponding fiber optic point；
Analysis module: it is carried out for the data center according to the Brillouin shift and dependent variable that mark corresponding fiber optic point
The analysis of pipeline stress, and the pipeline stress come that analyzes is fed back into management user.
Optionally, the system also includes:
Detector wake-up module: for sending wake up instruction, the detector to the detector being fixed on pipeline
Wake up instruction is responded, into acquisition mode；
Radiating laser beams module: for after the detector enters acquisition mode, to the optical fiber being fixed on pipeline
One end emits laser beam.
Optionally, the computing module includes:
Distance acquiring unit: for the data processing centre according to the mark of the Brillouin scattering optical signal of the label
Note determines the detector for detecting the Brillouin scattering optical signal of label at a distance from transmitting laser beam one end optical fiber；
Brillouin shift acquiring unit: in the loss late, distance and cloth for being propagated on the optical fiber according to laser beam
Deep scattered light signal obtains the Brillouin shift of the corresponding fiber optic point of mark point；
Dependent variable acquiring unit: for constructing the Brillouin shift of the corresponding fiber optic point of mark point and the dependent variable line of optical fiber
Sexual intercourse equation obtains the dependent variable of optical fiber.
In embodiments of the present invention, in the cloth for the optical fiber being fixed on pipeline by the detector detection being fixed on pipeline
Deep scattered light signal, and the Brillouin scattering optical signal of acquisition is marked；Detector believes the Brillouin scattering of label
Number it is sent to wireless data transmission terminal；Wireless data transmission terminal is sent in the Brillouin scattering optical signal for receiving label
Data processing centre；Data processing centre perform corresponding processing with pipeline whether Yi Chang analysis, will analysis result to management
User feeds back；It may be implemented long-distance distributed to pipeline progress non-blind area monitoring；Optical fiber can be corrosion-resistant and long-term
It is stable to work in water body, in rock mass or in highfield；It can accurately determine pipeline abnormal position, and can be in real time to depth
The pipeline for being embedded in underground carries out stress monitoring, convenient to be managed to buried underground, effectively reduces because of pipeline buriedly
Lower shortage is effectively managed and is monitored and there are pipeline breaking risk problems.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it is clear that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the process of the pipeline stress analysis method based on optical fiber Brillouin scattering light in the embodiment of the present invention
Schematic diagram；
Fig. 2 is the pipeline stress analysis method based on optical fiber Brillouin scattering light in another embodiment of the present invention
Flow diagram；
Fig. 3 is the structure of the pipeline stress analysis system based on optical fiber Brillouin scattering light in the embodiment of the present invention
Composition schematic diagram；
Fig. 4 is the pipeline stress analysis system based on optical fiber Brillouin scattering light in another embodiment of the present invention
Structure composition schematic diagram.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
Embodiment:
Referring to Fig. 1, Fig. 1 is the pipeline stress analysis based on optical fiber Brillouin scattering light in the embodiment of the present invention
The flow diagram of method.
As shown in Figure 1, a kind of pipeline stress analysis method based on optical fiber Brillouin scattering light, the method packet
It includes:
S11: the Brillouin scattering optical signal for the optical fiber that the detector detection being fixed on pipeline is fixed on pipeline, and it is right
The Brillouin scattering optical signal of acquisition is marked；
In the specific implementation process, on duct wall embed an optical fiber, or along on duct wall arrange an optical fiber,
It is disposed with detector in equidistant or unequal spacing on optical fiber, wherein detector is that the Brillouin on detection optical fiber dissipates
Penetrate the detector of optical signal；Wherein the detector is mounted on optical fiber, the Brillouin scattering optical signal on detection optical fiber；It visits
The distance for surveying device installation can be 5M or 10M or other spacing, can be installed with unequal spacing, in the underground of Pipes Buried Deep Underground
The more complicated duct section of situation, the spacing for installing detector can be smaller, is conducive to accurately carrying out Brillouin scattering
The acquisition of signal, when subsurface geology situation, the complex situations of Pipes Buried Deep Underground are less, detector installation can be less, but also not
The spacing of 15M should be less than.
Specifically, the Brillouin scattering letter on the optical fiber that the detector detection being fixed on pipeline is fixed on duct wall
Number, detector is after detecting the Brillouin scattering optical signal on optical fiber, according to the number of detector in the cloth detected
Deep scattered light signal is marked accordingly, and in this way in subsequent progress respective handling, the cloth can be traced by label
In deep scattered light signal be which detector detects to obtain.Wherein, the Brillouin scattering optical signal of acquisition is marked, is wrapped
Include: the detector is marked the Brillouin scattering optical signal of acquisition according to the number of itself.
Certainly, method used by the Brillouin scattering optical signal detected being marked not only can be according to spy
The Brillouin scattering optical signal that the number of survey device itself detects it can also be marked into label according to the others of the detector
Knowledge coding carries out its Brillouin scattering optical signal detected and is marked.
S12: the Brillouin scattering optical signal of label occurs to wireless data transmission terminal the detector；It is described wireless
The Brillouin scattering optical signal for receiving label is sent to data processing centre by data transmission terminal；
In specific implementation process of the present invention, wireless data transmission terminal is installed on duct wall, which passes
Defeated terminal, which can be, to be embedded in duct wall, is also possible to be fixed on duct wall, and wherein wireless data transmission terminal can lead to
The detector for betiding periphery for crossing wireless transmission is communicated, and can also be carried out by the detector on wired mode and periphery
Communication, it can by way of wireless receiving or Brillouin scattering that the mode pick-up probe of cable network reception detects
Signal is so that the distance between two detectors are farther away, can each detector be equipped with a wireless data transmission terminal, if
The distance between detector is relatively close, i.e. detector more extensive part, can share a wireless data transmission with multiple detectors
Terminal.
Specifically, after detector detects corresponding Brillouin scattering optical signal, and it is marked accordingly
Afterwards, by wired or wirelessly the Brillouin scattering optical signal of label is transmitted on wireless data transmission terminal, nothing
Line data transmission terminal performs corresponding processing these data, including integrate, sort (temporally or by label), compress etc.
Reason.
In specific implementation process of the present invention, wireless data transmission terminal is in the Brillouin scattering optical signal for receiving label
Later, and after performing corresponding processing, these data are wirelessly transmitted to data processing centre.
S13: the data processing centre calculates light corresponding with label according to the Brillouin scattering optical signal of the label
The Brillouin shift and dependent variable of fibre point；
In embodiments of the present invention, the data processing centre according to the Brillouin scattering optical signal of the label calculate with
Mark the Brillouin shift and dependent variable of corresponding fiber optic point, comprising: in cloth of the data processing centre according to the label
The label of deep scattered light signal determines the detector for detecting the Brillouin scattering optical signal of label and transmitting laser beam one end light
Fine distance；Loss late, distance and the Brillouin scattering signal acquisition mark point propagated on the optical fiber according to laser beam
The Brillouin shift of corresponding fiber optic point；The dependent variable of the Brillouin shift and optical fiber that construct the corresponding fiber optic point of mark point is linear
Relation equation obtains the dependent variable of optical fiber.
Specifically, optical signal inside of optical fibre propagate when because intramolecule vibration etc. factors Brillouin can occur
Scattering effect can detect Brillouin scattering optical signal and corresponding Brillouin by the detector of Brillouin scattering optical signal
Frequency displacement.
Detection Brillouin shift in order to be more accurate, it is necessary first to determine detector at a distance from laser beam incidence end,
According to the number of the self marker of detector, to determine the position of the detector, after determining the position of the detector
The optical fiber of laser beam incidence one end is got the distance between to the detector according to light wiring distance.
After obtaining laser beam incidence one end to the distance between the detector, uploaded according to laser beam in the optical fiber
Loss late, distance and the Brillouin scattering optical signal broadcast the too late loss late propagated on optical fiber and apart from when frequency displacement calculate
The Brillouin shift of fiber optic point corresponding with label, to obtain accurately in the Brillouin shift of the fiber optic point.
Then according to the line between the brillouin frequency in-migration building Brillouin shift for changing fiber optic point and dependent variable of acquisition
Property equation, determines the dependent variable of the point by solving the linear equation；To obtain the dependent variable of the point.
Specifically, the strain linear relationship equation of the Brillouin shift for constructing the corresponding fiber optic point of mark point and optical fiber
Are as follows:
Wherein, vBThe Brillouin shift for the optical fiber that (ε) is the dependent variable of optical fiber when being ε, vBIt (0) be the dependent variable of optical fiber is 0
When optical fiber Brillouin shift,For proportionality coefficient, the dependent variable of ε optical fiber.
S14: the data center carries out pipeline stress according to the Brillouin shift and dependent variable that mark corresponding fiber optic point
State analysis, and the pipeline stress come that analyzes is fed back into management user.
In specific implementation process of the present invention, data center is according to the corresponding fiber optic point of label that acquires of modes such as calculating
Brillouin shift and dependent variable carry out analysis comparison, the analysis comparison be is carried out according to preset threshold value, analysis comparison
In the process, whether the Brillouin shift and dependent variable for marking corresponding fiber optic point are greater than preset threshold, if Brillouin shift and answering
Variable is all larger than preset threshold, then judges that the pipeline stress of the corresponding fiber optic point of the label there are larger exception, needs
Abnormality warnings are issued to management user, need to handle in time；If being greater than one of in Brillouin shift and dependent variable pre-
If threshold value, then the pipeline stress of the corresponding fiber optic point of the label is judged there may be exception, and Western medicine is sent out to management user
It send there may be abnormal prompting, timely follow-up is needed to handle；If, can be anti-to management user no more than preset threshold value
Feedback can not also be to management user feedback.
When judging the pipeline stress exception of the corresponding fiber optic point of the label, triggering pipeline stress exception
Exceptional instructions, and by the exceptional instructions to management user feedback.
I.e. in the pipeline stress exception of the corresponding fiber optic point of judge mark, according to the intensity of anomaly judged, touching
Send out the extremely corresponding exceptional instructions of pipeline stress, and by corresponding exceptional instructions to management user feedback.
In embodiments of the present invention, in the cloth for the optical fiber being fixed on pipeline by the detector detection being fixed on pipeline
Deep scattered light signal, and the Brillouin scattering optical signal of acquisition is marked；Detector believes the Brillouin scattering of label
Number it is sent to wireless data transmission terminal；Wireless data transmission terminal is sent in the Brillouin scattering optical signal for receiving label
Data processing centre；Data processing centre perform corresponding processing with pipeline whether Yi Chang analysis, will analysis result to management
User feeds back；It may be implemented long-distance distributed to pipeline progress non-blind area monitoring；Optical fiber can be corrosion-resistant and long-term
It is stable to work in water body, in rock mass or in highfield；It can accurately determine pipeline abnormal position, and can be in real time to depth
The pipeline for being embedded in underground carries out stress monitoring, convenient to be managed to buried underground, effectively reduces because of pipeline buriedly
Lower shortage is effectively managed and is monitored and there are pipeline breaking risk problems.
Embodiment:
Referring to Fig. 2, Fig. 2 is the pipeline stress based on optical fiber Brillouin scattering light in another embodiment of the present invention
The flow diagram of analysis method.
As shown in Fig. 2, a kind of pipeline stress analysis method based on optical fiber Brillouin scattering light, the method packet
It includes:
S21: sending wake up instruction to the detector being fixed on pipeline, and the detector responds wake up instruction, into
Enter acquisition mode；
It is that wake up instruction, detection are sent to the detector being fixed on pipeline first in specific implementation process of the present invention
Device responds wake up instruction, and detector enters Brillouin scattering optical signal detection state.
S22: after the detector enters acquisition mode, emit laser beam to the one end for the optical fiber being fixed on pipeline；
In specific implementation process of the present invention, after detector enters Brillouin scattering optical signal detection state, use
Laser emitter emits laser beam to the one end for the optical fiber being fixed on pipeline.
S23: the Brillouin scattering optical signal for the optical fiber that the detector detection being fixed on pipeline is fixed on pipeline, and it is right
The Brillouin scattering optical signal of acquisition is marked；
S24: the Brillouin scattering optical signal of label occurs to wireless data transmission terminal the detector；It is described wireless
The Brillouin scattering optical signal for receiving label is sent to data processing centre by data transmission terminal；
S25: the data processing centre calculates light corresponding with label according to the Brillouin scattering optical signal of the label
The Brillouin shift and dependent variable of fibre point；
S26: the data center carries out pipeline stress according to the Brillouin shift and dependent variable that mark corresponding fiber optic point
State analysis, and the pipeline stress come that analyzes is fed back into management user.
In specific implementation process of the present invention, the specific embodiment of S23, S24, S25 and S26 can refer to above-mentioned implementation
Example, details are not described herein.
In embodiments of the present invention, in the cloth for the optical fiber being fixed on pipeline by the detector detection being fixed on pipeline
Deep scattered light signal, and the Brillouin scattering optical signal of acquisition is marked；Detector believes the Brillouin scattering of label
Number it is sent to wireless data transmission terminal；Wireless data transmission terminal is sent in the Brillouin scattering optical signal for receiving label
Data processing centre；Data processing centre perform corresponding processing with pipeline whether Yi Chang analysis, will analysis result to management
User feeds back；It may be implemented long-distance distributed to pipeline progress non-blind area monitoring；Optical fiber can be corrosion-resistant and long-term
It is stable to work in water body, in rock mass or in highfield；It can accurately determine pipeline abnormal position, and can be in real time to depth
The pipeline for being embedded in underground carries out stress monitoring, convenient to be managed to buried underground, effectively reduces because of pipeline buriedly
Lower shortage is effectively managed and is monitored and there are pipeline breaking risk problems.
Embodiment:
Referring to Fig. 3, Fig. 3 is the pipeline stress analysis based on optical fiber Brillouin scattering light in the embodiment of the present invention
The structure composition schematic diagram of system.
As shown in figure 3, a kind of pipeline stress analysis system based on optical fiber Brillouin scattering light, the system packet
It includes:
Detecting module 11: the Brillouin scattering for the optical fiber that the detector detection for being fixed on pipeline is fixed on pipeline
Optical signal, and the Brillouin scattering optical signal of acquisition is marked；
In the specific implementation process, on duct wall embed an optical fiber, or along on duct wall arrange an optical fiber,
It is disposed with detector in equidistant or unequal spacing on optical fiber, wherein detector is that the Brillouin on detection optical fiber dissipates
Penetrate the detector of optical signal；Wherein the detector is mounted on optical fiber, the Brillouin scattering optical signal on detection optical fiber；It visits
The distance for surveying device installation can be 5M or 10M or other spacing, can be installed with unequal spacing, in the underground of Pipes Buried Deep Underground
The more complicated duct section of situation, the spacing for installing detector can be smaller, is conducive to accurately carrying out Brillouin scattering
The acquisition of signal, when subsurface geology situation, the complex situations of Pipes Buried Deep Underground are less, detector installation can be less, but also not
The spacing of 15M should be less than.
Specifically, the Brillouin scattering letter on the optical fiber that the detector detection being fixed on pipeline is fixed on duct wall
Number, detector is after detecting the Brillouin scattering optical signal on optical fiber, according to the number of detector in the cloth detected
Deep scattered light signal is marked accordingly, and in this way in subsequent progress respective handling, the cloth can be traced by label
In deep scattered light signal be which detector detects to obtain.Wherein, the Brillouin scattering optical signal of acquisition is marked, is wrapped
Include: the detector is marked the Brillouin scattering optical signal of acquisition according to the number of itself.
Certainly, method used by the Brillouin scattering optical signal detected being marked not only can be according to spy
The Brillouin scattering optical signal that the number of survey device itself detects it can also be marked into label according to the others of the detector
Knowledge coding carries out its Brillouin scattering optical signal detected and is marked.
Sending module 12: the Brillouin scattering optical signal of label was occurred to wireless data transmission end for the detector
End；The Brillouin scattering optical signal for receiving label is sent to data processing centre by the wireless data transmission terminal；
In specific implementation process of the present invention, wireless data transmission terminal is installed on duct wall, which passes
Defeated terminal, which can be, to be embedded in duct wall, is also possible to be fixed on duct wall, and wherein wireless data transmission terminal can lead to
The detector for betiding periphery for crossing wireless transmission is communicated, and can also be carried out by the detector on wired mode and periphery
Communication, it can by way of wireless receiving or Brillouin scattering that the mode pick-up probe of cable network reception detects
Signal is so that the distance between two detectors are farther away, can each detector be equipped with a wireless data transmission terminal, if
The distance between detector is relatively close, i.e. detector more extensive part, can share a wireless data transmission with multiple detectors
Terminal.
Specifically, after detector detects corresponding Brillouin scattering optical signal, and it is marked accordingly
Afterwards, by wired or wirelessly the Brillouin scattering optical signal of label is transmitted on wireless data transmission terminal, nothing
Line data transmission terminal performs corresponding processing these data, including integrate, sort (temporally or by label), compress etc.
Reason.
In specific implementation process of the present invention, wireless data transmission terminal is in the Brillouin scattering optical signal for receiving label
Later, and after performing corresponding processing, these data are wirelessly transmitted to data processing centre.
Computing module 13: it calculates and marks according to the Brillouin scattering optical signal of the label for the data processing centre
Remember the Brillouin shift and dependent variable of corresponding fiber optic point；
In embodiments of the present invention, the computing module 13 includes: distance acquiring unit: being used for the data processing centre
According to the label of the Brillouin scattering optical signal of the label, the detector for detecting the Brillouin scattering optical signal of label is determined
At a distance from transmitting laser beam one end optical fiber；Brillouin shift acquiring unit: for being propagated on the optical fiber according to laser beam
Loss late, distance and the corresponding fiber optic point of Brillouin scattering signal acquisition mark point Brillouin shift；Dependent variable obtains
Unit: for constructing the Brillouin shift of the corresponding fiber optic point of mark point and the dependent variable linear relationship equation of optical fiber, light is obtained
Fine dependent variable.
Specifically, optical signal inside of optical fibre propagate when because intramolecule vibration etc. factors Brillouin can occur
Scattering effect can detect Brillouin scattering optical signal and corresponding Brillouin by the detector of Brillouin scattering optical signal
Frequency displacement.
Detection Brillouin shift in order to be more accurate, it is necessary first to determine detector at a distance from laser beam incidence end,
According to the number of the self marker of detector, to determine the position of the detector, after determining the position of the detector
The optical fiber of laser beam incidence one end is got the distance between to the detector according to light wiring distance.
After obtaining laser beam incidence one end to the distance between the detector, uploaded according to laser beam in the optical fiber
Loss late, distance and the Brillouin scattering optical signal broadcast the too late loss late propagated on optical fiber and apart from when frequency displacement calculate
The Brillouin shift of fiber optic point corresponding with label, to obtain accurately in the Brillouin shift of the fiber optic point.
Then according to the line between the brillouin frequency in-migration building Brillouin shift for changing fiber optic point and dependent variable of acquisition
Property equation, determines the dependent variable of the point by solving the linear equation；To obtain the dependent variable of the point.
Specifically, the strain linear relationship equation of the Brillouin shift for constructing the corresponding fiber optic point of mark point and optical fiber
Are as follows:
Wherein, vBThe Brillouin shift for the optical fiber that (ε) is the dependent variable of optical fiber when being ε, vBIt (0) be the dependent variable of optical fiber is 0
When optical fiber Brillouin shift,For proportionality coefficient, the dependent variable of ε optical fiber.
Analysis module 14: for the data center according to the Brillouin shift and dependent variable for marking corresponding fiber optic point into
The analysis of row pipeline stress, and the pipeline stress come that analyzes is fed back into management user.
In specific implementation process of the present invention, data center is according to the corresponding fiber optic point of label that acquires of modes such as calculating
Brillouin shift and dependent variable carry out analysis comparison, the analysis comparison be is carried out according to preset threshold value, analysis comparison
In the process, whether the Brillouin shift and dependent variable for marking corresponding fiber optic point are greater than preset threshold, if Brillouin shift and answering
Variable is all larger than preset threshold, then judges that the pipeline stress of the corresponding fiber optic point of the label there are larger exception, needs
Abnormality warnings are issued to management user, need to handle in time；If being greater than one of in Brillouin shift and dependent variable pre-
If threshold value, then the pipeline stress of the corresponding fiber optic point of the label is judged there may be exception, and Western medicine is sent out to management user
It send there may be abnormal prompting, timely follow-up is needed to handle；If, can be anti-to management user no more than preset threshold value
Feedback can not also be to management user feedback.
When judging the pipeline stress exception of the corresponding fiber optic point of the label, triggering pipeline stress exception
Exceptional instructions, and by the exceptional instructions to management user feedback.
I.e. in the pipeline stress exception of the corresponding fiber optic point of judge mark, according to the intensity of anomaly judged, touching
Send out the extremely corresponding exceptional instructions of pipeline stress, and by corresponding exceptional instructions to management user feedback.
In embodiments of the present invention, in the cloth for the optical fiber being fixed on pipeline by the detector detection being fixed on pipeline
Deep scattered light signal, and the Brillouin scattering optical signal of acquisition is marked；Detector believes the Brillouin scattering of label
Number it is sent to wireless data transmission terminal；Wireless data transmission terminal is sent in the Brillouin scattering optical signal for receiving label
Data processing centre；Data processing centre perform corresponding processing with pipeline whether Yi Chang analysis, will analysis result to management
User feeds back；It may be implemented long-distance distributed to pipeline progress non-blind area monitoring；Optical fiber can be corrosion-resistant and long-term
It is stable to work in water body, in rock mass or in highfield；It can accurately determine pipeline abnormal position, and can be in real time to depth
The pipeline for being embedded in underground carries out stress monitoring, convenient to be managed to buried underground, effectively reduces because of pipeline buriedly
Lower shortage is effectively managed and is monitored and there are pipeline breaking risk problems.
Embodiment:
Referring to Fig. 4, Fig. 4 is the pipeline stress based on optical fiber Brillouin scattering light in another embodiment of the present invention
The structure composition schematic diagram of analysis system.
As shown in figure 4, a kind of pipeline stress analysis system based on optical fiber Brillouin scattering light, the system packet
It includes:
Detector wake-up module 21: for sending wake up instruction, the detection to the detector being fixed on pipeline
Device responds wake up instruction, into acquisition mode；
It is that wake up instruction, detection are sent to the detector being fixed on pipeline first in specific implementation process of the present invention
Device responds wake up instruction, and detector enters Brillouin scattering optical signal detection state.
Radiating laser beams module 22: for after the detector enters acquisition mode, to the optical fiber being fixed on pipeline
One end emit laser beam；
In specific implementation process of the present invention, after detector enters Brillouin scattering optical signal detection state, use
Laser emitter emits laser beam to the one end for the optical fiber being fixed on pipeline.
Detecting module 23: the Brillouin scattering for the optical fiber that the detector detection for being fixed on pipeline is fixed on pipeline
Optical signal, and the Brillouin scattering optical signal of acquisition is marked；
Sending module 24: the Brillouin scattering optical signal of label was occurred to wireless data transmission end for the detector
End；The Brillouin scattering optical signal for receiving label is sent to data processing centre by the wireless data transmission terminal；
Computing module 25: it calculates and marks according to the Brillouin scattering optical signal of the label for the data processing centre
Remember the Brillouin shift and dependent variable of corresponding fiber optic point；
Analysis module 26: for the data center according to the Brillouin shift and dependent variable for marking corresponding fiber optic point into
The analysis of row pipeline stress, and the pipeline stress come that analyzes is fed back into management user.
Wherein, the specific embodiment of detecting module 23, sending module 24, computing module 25 and analysis module 26 can consider and examine
Above-described embodiment, details are not described herein.
In embodiments of the present invention, in the cloth for the optical fiber being fixed on pipeline by the detector detection being fixed on pipeline
Deep scattered light signal, and the Brillouin scattering optical signal of acquisition is marked；Detector believes the Brillouin scattering of label
Number it is sent to wireless data transmission terminal；Wireless data transmission terminal is sent in the Brillouin scattering optical signal for receiving label
Data processing centre；Data processing centre perform corresponding processing with pipeline whether Yi Chang analysis, will analysis result to management
User feeds back；It may be implemented long-distance distributed to pipeline progress non-blind area monitoring；Optical fiber can be corrosion-resistant and long-term
It is stable to work in water body, in rock mass or in highfield；It can accurately determine pipeline abnormal position, and can be in real time to depth
The pipeline for being embedded in underground carries out stress monitoring, convenient to be managed to buried underground, effectively reduces because of pipeline buriedly
Lower shortage is effectively managed and is monitored and there are pipeline breaking risk problems.
Those of ordinary skill in the art will appreciate that all or part of the steps in the various methods of above-described embodiment is can
It is completed with instructing relevant hardware by program, which can be stored in a computer readable storage medium, storage
Medium may include: read-only memory (ROM, ReadOnly Memory), random access memory (RAM, Random Access
Memory), disk or CD etc..
In addition, being provided for the embodiments of the invention the pipeline stress analysis based on optical fiber Brillouin scattering light above
Method and system are described in detail, and should use specific case herein and carry out to the principle of the present invention and embodiment
It illustrates, the above description of the embodiment is only used to help understand the method for the present invention and its core ideas；Meanwhile for this field
Those skilled in the art, according to the thought of the present invention, there will be changes in the specific implementation manner and application range, to sum up
Described, the contents of this specification are not to be construed as limiting the invention.
Claims (10)
1. a kind of pipeline stress analysis method based on optical fiber Brillouin scattering light, which is characterized in that the described method includes:
The Brillouin scattering optical signal for the optical fiber that the detector detection being fixed on pipeline is fixed on pipeline, and to the cloth of acquisition
In deep scattered light signal be marked；
The Brillouin scattering optical signal of label occurs to wireless data transmission terminal the detector；The wireless data transmission
The Brillouin scattering optical signal for receiving label is sent to data processing centre by terminal；
The data processing centre calculates the cloth of fiber optic point corresponding with label according to the Brillouin scattering optical signal of the label
In deep frequency displacement and dependent variable；
The data center carries out the analysis of pipeline stress according to the Brillouin shift and dependent variable that mark corresponding fiber optic point,
And the pipeline stress come that analyzes is fed back into management user.
2. pipeline stress analysis method according to claim 1, which is characterized in that before the method further include:
Wake up instruction is sent to the detector being fixed on pipeline, the detector responds wake up instruction, into detection shape
State；
After the detector enters acquisition mode, emit laser beam to the one end for the optical fiber being fixed on pipeline.
3. pipeline stress analysis method according to claim 1, which is characterized in that the Brillouin of described pair of acquisition dissipates
Optical signal is penetrated to be marked, comprising:
It is marked according to Brillouin scattering optical signal of the number of detector itself to acquisition.
4. pipeline stress analysis method according to claim 1, which is characterized in that the data processing centre according to
The Brillouin scattering optical signal of the label calculates the Brillouin shift and dependent variable of fiber optic point corresponding with label, comprising:
The data processing centre determines in the cloth for detecting label according to the label of the Brillouin scattering optical signal of the label
The detector of deep scattered light signal is at a distance from transmitting laser beam one end optical fiber；
Loss late, distance and the Brillouin scattering signal acquisition mark point propagated on the optical fiber according to laser beam are corresponding
The Brillouin shift of fiber optic point；
The Brillouin shift of the corresponding fiber optic point of mark point and the dependent variable linear relationship equation of optical fiber are constructed, answering for optical fiber is obtained
Variable.
5. pipeline stress analysis method according to claim 4, which is characterized in that the building mark point is corresponding
The Brillouin shift of fiber optic point and the strain linear relationship equation of optical fiber are as follows:
Wherein, vBThe Brillouin shift for the optical fiber that (ε) is the dependent variable of optical fiber when being ε, vBIt (0) be the dependent variable of optical fiber was 0 time
Fine Brillouin shift,For proportionality coefficient, the dependent variable of ε optical fiber.
6. pipeline stress analysis method according to claim 1, which is characterized in that the data center is according to label
The Brillouin shift and dependent variable of corresponding fiber optic point carry out the analysis of pipeline stress, comprising:
The data center carries out analysis comparison to the Brillouin shift and dependent variable that mark corresponding fiber optic point, judges the mark
Whether the Brillouin shift and dependent variable for remembering corresponding fiber optic point are greater than preset threshold, if more than then judging that the label corresponds to
Fiber optic point pipeline stress it is abnormal.
7. pipeline stress analysis method according to claim 1, which is characterized in that it is described by it is described analyze come
Pipeline stress feeds back to management user, comprising:
When judging the pipeline stress exception of the corresponding fiber optic point of the label, the exception of pipeline stress exception is triggered
Instruction, and by the exceptional instructions to management user feedback.
8. a kind of pipeline stress analysis system based on optical fiber Brillouin scattering light, which is characterized in that the system comprises:
Detecting module: the Brillouin scattering letter for the optical fiber that the detector detection for being fixed on pipeline is fixed on pipeline
Number, and the Brillouin scattering optical signal of acquisition is marked；
Sending module: the Brillouin scattering optical signal of label is occurred to wireless data transmission terminal for the detector；Institute
It states wireless data transmission terminal and the Brillouin scattering optical signal for receiving label is sent to data processing centre；
Computing module: corresponding with label according to the calculating of the Brillouin scattering optical signal of the label for the data processing centre
Fiber optic point Brillouin shift and dependent variable；
Analysis module: pipeline is carried out according to the Brillouin shift and dependent variable that mark corresponding fiber optic point for the data center
Stress analysis, and the pipeline stress come that analyzes is fed back into management user.
9. pipeline stress analysis system according to claim 8, which is characterized in that the system also includes:
Detector wake-up module: for sending wake up instruction, the detector response to the detector being fixed on pipeline
Wake up instruction, into acquisition mode；
Radiating laser beams module: for after the detector enters acquisition mode, to the one end for the optical fiber being fixed on pipeline
Emit laser beam.
10. pipeline stress analysis system according to claim 8, which is characterized in that the computing module includes:
Distance acquiring unit: for the data processing centre according to the label of the Brillouin scattering optical signal of the label, really
Surely the detector of the Brillouin scattering optical signal of label is detected at a distance from transmitting laser beam one end optical fiber；
Brillouin shift acquiring unit: loss late, distance and Brillouin for being propagated on the optical fiber according to laser beam dissipate
Penetrate the Brillouin shift that optical signal obtains the corresponding fiber optic point of mark point；
Dependent variable acquiring unit: the dependent variable for the Brillouin shift and optical fiber that construct the corresponding fiber optic point of mark point is linearly closed
It is equation, obtains the dependent variable of optical fiber.
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