CN109737315A - A kind of line leakage method and system - Google Patents
A kind of line leakage method and system Download PDFInfo
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Abstract
The present invention provides a kind of pipeline leakage monitoring method and system, and the system comprises cloud servers, optical signal transceiver equipment, distributed fiberoptic sensor.Pipeline leakage monitoring method provided by the invention can accurately identify leakage event by the setting of event database；By the setting of sequential identification codes, the modulated optical signal of different moments measurement can recognize；Pass through the set-up modes such as d-t database, accelerate the data processing speed of cloud server, have the characteristics that processing speed is fast, event recognition works well, the optical signal transceiver device structure of the system is simple, production and maintenance cost are lower, be conducive to extensive popularization and application, there is good practicability in actual use.
Description
Technical field
The present invention relates to distributing optical fiber sensing fields, and in particular to arrives a kind of line leakage method and system.
Background technique
Pipeline transportation is a kind of important way of water resource and oil-gas transportation, but pipeline often can during long service
There is leakage accident.The main reason for leakage includes: corrosive pipeline, artificial damage etc., and due to settlement of foundation and earthquake disaster
Evil causes the damage etc. of pipe joint and its vicinity.Leakage accident once occurs for water supply line, not only to resident living and work
Agricultural production causes extreme influence, and will cause huge economic loss and the wasting of resources.Therefore, in order to which early detection is buried
Pipe leakage situation simultaneously adopts remedial measures in time, effectively monitors to pipeline implementation most important.
The Distributed Optical Fiber Sensing Techniques occurred in recent years have a good application prospect in terms of monitoring pipeline safety,
The characteristics of long-distance distributed sensing, naturally suits this kind of extensive linear structure of pipeline, and pipeline any position on the way may be implemented
Distributed measurement.Therefore, it is necessary to a kind of pipeline leakage monitoring method and system are designed based on Distributed Optical Fiber Sensing Techniques,
Realize the monitoring of pipeline leakage.
Summary of the invention
In order to realize pipeline leakage monitoring, the embodiment of the invention provides a kind of pipeline leakage monitoring method and system, should
Method and system realizes there is good monitoring effect, leakage event accuracy of judgement, leakage event based on Distributed Optical Fiber Sensing Techniques
Judge the features such as quick, there is good practicability in practical applications.
Correspondingly, the described method comprises the following steps the embodiment of the invention provides a kind of pipeline leakage monitoring method:
Building leakage event database on server beyond the clouds, the leakage event database includes leakage event and described
Characteristic signal corresponding to leakage event；
Enabling signal is issued to optical signal transceiver equipment based on cloud server and is received in the optical signal transceiver equipment
The the first feedback signal f passed1(t, s), t are the timing node that optical signal transceiver equipment receives modulated optical signal, and s is the corresponding time
The modulated optical signal value of node；
Based on cloud server by the first feedback signal f1(t, s) is converted to the second feedback signal f2(L, T), L are point
To the distance of the optical signal transceiver equipment, T is corresponding on distributed fiberoptic sensor for any position on cloth fibre optical sensor
Position temperature；
The second feedback signal f is analyzed based on the characteristic signal2(L, T) obtains third feedback signal f3(L, b), b
For the state of the distributed fiberoptic sensor along its length；
Paving mode based on the distributed fiberoptic sensor on pipeline, by third feedback signal f3(L, b) conversion
It is the specific location on the pipe surface for the 4th feedback signal f4 (a, b), a；
Based on the 4th feedback signal f4(a, b) generates pipeline leakage real time monitoring signal.
Optional embodiment, the leakage event database further include:
The leakage event entry-into-force time；
Priority corresponding to leakage event；
Reply working group corresponding to leakage event.
Optional embodiment, it is described that the second feedback signal f is analyzed based on the characteristic signal2(L, T) obtains
Three feedback signal f3(L, b) the following steps are included:
Using real-time time as screening conditions, the leakage event database is screened based on the leakage event entry-into-force time,
Generate filtered data base；
The second feedback signal f is analyzed based on the characteristic signal in the filtered data base2(L, T) judges that pipeline is
The no leakage event occurred in the filtered data base；
When the event of leakage occurs, based on priority corresponding to the leakage event, different state b are generated, second
Feedback signal f2(L, T) is converted to third feedback signal f3(L, b).
Optional embodiment, the method also includes following steps:
When the event of leakage occurs, cloud server generates caution signal and is sent to corresponding to the leakage time and answers
To working group.
Optional embodiment, it is described to issue enabling signal based on cloud server to optical signal transceiver equipment and receive institute
State the first feedback signal f of optical signal transceiver equipment upload1(t, s) the following steps are included:
Enabling signal is issued to optical signal transceiver equipment based on cloud server；
The optical signal transceiver equipment generates initial optical signal and is directed into distributed fiberoptic sensor；
The distributed fiberoptic sensor forms modulated optical signal after being modulated to the initial optical signal；
The optical signal transceiver equipment will receive the timing node t and corresponding modulated optical signal value s of modulated optical signal
It is packaged, generates the first feedback signal f1(t, s) and it is uploaded to cloud server.
Optional embodiment, the modulated optical signal value include Stokes Raman diffused light power PSAnd Anti-
Stokes Raman diffused light power PAS。
Optional embodiment, the conversion between the first feedback signal f1 (t, s) and the second feedback signal f2 (L, T) are closed
System are as follows:
C is the light velocity in vacuum, and t is timing node, and IOR is the refractive index of distributed fiberoptic sensor；
PS、PASRespectively Stokes Raman diffused light and Anti-Stokes Raman scattering optical power；αS、αASFor Stokes
The loss factor of Raman diffused light and Anti-Stokes Raman diffused light；L ' is the calibration fiber lengths being placed under constant temperature TO；
H is Planck's constant；K is Boltzmann constant；Δ v is scattering frequency displacement wave number.
Optional embodiment, the cloud server are based on enabling signal data packet and issue enabling signal to optical signal receipts
Equipment is sent out, data packet uploads first feedback signal to cloud server to the optical signal transceiver equipment based on feedback signal；
The enabling signal data packet includes a sequential identification codes；The feedback signal data packet includes believing with corresponding starting
The identical sequential identification codes of the sequential identification codes of number packet.
Optional embodiment, the characteristic signal include:
The temporal characteristics signal of single distributed fiberoptic sensor；
The continuous characteristic signal of single distributed fiberoptic sensor；
The temporal characteristics signal of multiple distributed fiberoptic sensors；
The continuous characteristic signal of multiple distributed fiberoptic sensors.
Correspondingly, the present invention is also the same as a kind of pipeline leakage monitoring system, comprising:
Cloud server: for issuing enabling signal to optical signal transceiver equipment, the modulation of optical signal transceiver equipment is received
Optical signal, and after carrying out processing analysis to the modulated optical signal, different degrees of caution signal is formed based on leakage event
And it is sent to corresponding reply working group；
Optical signal transceiver equipment: the enabling signal issued for receiving cloud server generates initial optical signal, receives and adjusts
Optical signal processed is simultaneously uploaded to cloud server；
Distributed fiberoptic sensor: for being modulated optical signal by the initial optical signal modulation treatment.
The present invention provides a kind of pipeline leakage monitoring method and system, this method, can by the setting of event database
Accurately identify leakage event；By the setting of sequential identification codes, the modulated optical signal of different moments measurement can recognize；Pass through d-t
The set-up modes such as database accelerate the data processing speed of cloud server, and with processing speed, fast, event recognition works well
The characteristics of, the optical signal transceiver device structure of the system is simple, and production and maintenance cost are lower, is conducive to universal on a large scale answer
With in actual use with good practicability.
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 should be apparent 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 shows the pipeline leakage monitoring method flow diagram of the embodiment of the present invention；
Fig. 2 shows the leakage event database structural schematic diagrams of the embodiment of the present invention；
Fig. 3 shows distance-temperature curve schematic diagram of the embodiment of the present invention one；
Fig. 4 shows the pipeline leakage monitoring system structure chart of the embodiment of the present invention；
Fig. 5 shows the optical signal transceiver device structure schematic diagram of the embodiment of the present invention.
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.
Fig. 1 shows the pipeline leakage monitoring method flow diagram of the embodiment of the present invention.The embodiment of the invention provides one kind
Pipeline leakage monitoring method, comprising the following steps:
S101: building leakage event database on server beyond the clouds；
According to the set-up mode of distributed fiberoptic sensor on pipeline, prebuild in server beyond the clouds is needed to reveal event
Database, to pass through the second feedback signal f2(L, T) judges to whether there is leakage event on pipeline and reveals event
Content, L are that the distance of the optical signal transceiver equipment, T is distribution type fiber-optic biography for any position on distributed fiberoptic sensor
Corresponding position temperature on sensor.
Fig. 2 shows the leakage event database structural schematic diagrams of the embodiment of the present invention.Specifically, event database is at least
Including corresponding to characteristic signal corresponding to entry-into-force time corresponding to leakage event, leakage event, leakage event, leakage event
Priority and leakage event corresponding to five attributes of reply working group.
Specifically, single distributed fiberoptic sensor can play independent monitoring, for certain particular events, Duo Gefen
Cloth fibre optical sensor, which can form to match, closes monitoring effect.Therefore, the characteristic signal can be a distributing optical fiber sensing
The characteristic signal of device, or characteristic signal group composed by the characteristic signal of multiple distributed fiberoptic sensors.
In addition, single situation of change of the distributed fiberoptic sensor in continuous time, multiple distributed fiberoptic sensors exist
Situation of change on continuous time is likely to reflect a certain event.
In conclusion characteristic signal corresponding to event includes following several types:
A. the temporal characteristics signal of single distributed fiberoptic sensor；
B. the continuous characteristic signal of single distributed fiberoptic sensor；
C. the temporal characteristics signal of more a distributed fiberoptic sensors；
D. the continuous characteristic signal of more a distributed fiberoptic sensors.
Specifically, in terms of being directed to line leakage, the present invention distinguishes with regard to above-described four kinds of characteristic signal types
Distance is illustrated, and in specific implementation, the quantity of characteristic signal is more, and corresponding event is abundanter, the pipeline leakage monitoring
Method monitoring effect is better；The embodiment of the present invention is only illustrated with the event of several representative meanings as an example.
Embodiment one:
Fig. 3 shows instantaneous distance-temperature curve schematic diagram of the embodiment of the present invention one, and attached drawing Fig. 3 is special with a type
The distance of reference number-temperature curve schematic diagram, specifically, it is normal in pipeline conditions, when no event occurs, distance-temperature curve
Tend to a steady state, influenced by signal interference etc., may be fluctuated in a small range.In general, when pipeline inside transport
When for liquid, liquid generally has certain temperature difference with pipeline external, if causing liquid to flow out after pipeline is broken, can make point
Temperature on cloth fibre optical sensor gradually tends to fluid temperature；When pipeline inside transport is liquefied gas, pipeline leakage meeting
Liquefied gas is caused to flow out, liquefied gas volatilizees rapidly under normal pressure, takes away amount of heat, makes on distributed fiberoptic sensor
Temperature decrease；Therefore, when such as pipeline breaking causes the events such as oil, gas leakage to occur, in general, distributed fiberoptic sensor is anti-
L-T curve composed by feedback signal, it may appear that more apparent characteristic signal, the Δ T as shown in attached drawing Fig. 1 pass through the spy
Reference number, it can be inferred that whether pipeline is revealed.Occur it should be noted that Δ T is merely to illustrate on L-T curve with temperature
Abnormality changing value, for different pipe applications, Δ T may be positive, and may also be negative, attached drawing Fig. 2 be only used for it is schematically illustrate, with
There may be differences for actual conditions.
Embodiment two:
By single distributed fiberoptic sensor in embodiment 1, realizes and carried out to whether pipeline occurs leakage event
Monitoring；Specifically, the leakage speed that section goes out pipeline interior oil gas can be pushed away for the variation speed of the Δ T value in embodiment one.Tool
Body, the variation speed of Δ T value needs to obtain by the continuous signal acquisition of the single distributed fiberoptic sensor, corresponds to upper
The b type feature signal stated.Therefore, leakage event can further be analyzed by the continuous signal of single distributed fiberoptic sensor
Serious conditions, and make suitable counter-measure based on actual conditions.
Embodiment three:
By single distributed fiberoptic sensor in embodiment 1, realize to revealing event in pipe lengths
The function that position is positioned；Specifically, it is also necessary to which pipe circumference direction is positioned.In general, distributing optical fiber sensing
Device cannot be completely covered on pipe surface, be only capable of being laid on the side of pipeline, therefore, in order to carry out pipeline circle to leakage event
The positioning of circumferential direction.Specifically, multiple distributed fiberoptic sensors are uniformly distributed on the pipe surface, in conjunction with shown in attached drawing Fig. 2
The Δ T value of L-T curve, multiple distributed fiberoptic sensors has otherness, and the Δ T by different distributions formula fibre optical sensor is poor
Different analysis can position leakage event on pipe circumference direction.Application c type feature signal of the embodiment of the present invention, i.e.,
The instantaneous signal of multiple distributed fiberoptic sensors.
Example IV:
On the basis of example 1, in conjunction with the embodiments two and embodiment three, by multiple distributed fiberoptic sensors
Continuous signal analysis, when pipeline is revealed, internal high pressure oil gas can direction according to piping failure position and size,
The oil gas flow velocity in damaged notch direction is too fast, be right against or close to piping failure notch direction distributed fiberoptic sensor
Temperature changing speed is very fast, and the separate or non-temperature change for being right against the broken distributed fiberoptic sensor for calculating notch direction of pipeline
Speed is slower；Therefore, by d type feature signal, i.e., the continuous signal of multiple distributed fiberoptic sensors can determine whether out pipeline
The direction of damaged notch provides more references for event reply.
Specifically, leakage event database is the reason of needing to be arranged entry-into-force time attribute, change in time cycle property
Factor or mankind's cycle movement changing factor etc. regularity variation under the influence of, pipeline conditions can corresponding Development pattern change
Change；Cause pipe temperature to decline for example, winter temperature is lower, such variation be in actual job inevitably, can but be
Prediction；Therefore, it is possible to which the following occurs for meeting: feedback signal of the same distributed fiberoptic sensor under different time is
Different；Or when different events occurs, according to the difference for the time that event is occurred, same distributed fiberoptic sensor
Identical feedback signal may be generated.
Therefore, when constructing the event database, entry-into-force time attribute should also be added；On the one hand, when addition comes into force
Between after attribute, be based on event entry-into-force time attribute selection event database, event database in actual use can be greatly reduced
Scale improves matching and recognition efficiency, accelerates the identification of leakage event；On the other hand, under in different times, identical distribution
Formula fiber optic sensor feed back signal likely corresponds to multiple leakage events, after entry-into-force time attribute is added, only current time
The event to come into force just can be used for the matching and identification of distributed fiberoptic sensor feedback signal, can effectively increase leakage event recognition
Accuracy.
In addition, by the sensing principle of distributed fiberoptic sensor it is found that the received modulation light letter of optical signal transceiver equipment institute
Number for it is multiple by timing node t modulated optical signal s corresponding with the timing node form two dimension values, i.e. the first feedback signal
f1(t, s).
Specifically, temperature T can be calculated based on modulated optical signal s, it can calculate modulated optical signal s's based on timing node t
Distance L of the position away from optical signal transceiver equipment is generated, so that the first feedback signal is converted to the second feedback signal f2(L, T).
In specific implementation, distributed fiberoptic sensor and pipeline are after the completion of laying, distributed fiberoptic sensor and pipeline
Relative position be fixed, can be pipe by L Parameter Switch according to paving location of the distributed fiberoptic sensor on pipeline
Specific location a on road.
The characteristic signal of the embodiment of the present invention is mainly L-T characteristic signal, is applied in the second feedback signal f2The place of (L, T)
In reason；By above-mentioned conversion mode it is found that substantially, t parameter and a parameter have a fixed functional relation.
The optical signal prosessing rate limitation of light signal sending and receiving equipment, the final acquired modulation light of optical signal transceiver equipment
Signal is essentially a series of discrete point value established according to t parameter, rather than continuous.Therefore, for a segment pipe
For, use the quantity of the collected point of distributed fiberoptic sensor to be limited.Therefore, t parameter and L parameter are except through phase
Functional relation between mutually can also set up t-L Parameter Switch database and be passed through in a manner of mutual corresponding outside being converted
T parameter is directly converted to L parameter by the mode of database matching；For using functional operation, the side of database matching
Formula speed faster, is conducive to the quick processing of data.
Similarly, relevant t-a Parameter Switch database, L-a Parameter Switch database, to accelerate operation effect can be set
Rate.
It should be noted that the hardware carrier needed for calculating in real time is processor, and hardware carrier needed for database is
The hardware cost of reservoir, processor scale is high compared with the hardware cost of reservoir, in the case where especially extensive setting, because
This, it is more real-time using database schema compared to hardware cost needed for real-time calculate although database is larger
The implementation cost of calculation is lower.
S102: enabling signal is issued to optical signal transceiver equipment based on cloud server；
S103: the optical signal transceiver equipment generates initial optical signal and is directed into distributed fiberoptic sensor；
S104: the distributed fiberoptic sensor forms modulated optical signal after being modulated to the initial optical signal；
S105: the optical signal transceiver equipment believes the timing node t for receiving modulated optical signal with corresponding modulation light
Number value s is packaged, and generates the first feedback signal f1(t, s) and it is uploaded to cloud server；
Mainly there are three effects for the optical signal transceiver equipment of the embodiment of the present invention, are respectively generated just by enabling signal triggering
Beginning optical signal receives through distributed fiberoptic sensor treated modulated optical signal, is packaged the feedback signal modulated optical signal
For the first feedback signal f1(t, s) and it is sent to cloud server.
On the one hand, in specific implementation, it is provided with multiple optical signal transceiver equipment in the entire system；If multiple optical signals
Transceiver carries out download and input of data simultaneously will cause serious network congestion and can generate to cloud server very big
Data throughput pressure and data processing pressure.
On the other hand, real-time required by the pipeline leakage time is not strong, in specific implementation, is directed to what pipeline was occurred
Event needs by signal feedback after an event occurs, signal analysis and processing, manually copes with whole flow process；Artificial reply process
Including to event content acquisition, generate event counte-rplan, event counte-rplan execute etc. multiple steps, in whole flow process
In, no matter the time frame of signal feedback is Millisecond, second grade, minute grade, is influenced on whole flow process the time it takes smaller；
In addition, being laid with test according to the small towns scale divided at present with small-scale pipeline distributed fiberoptic sensor equipment and carrying out
It simulates, pipe deforming monitoring method provided by the embodiment of the present invention acquires the distribution on all pipelines using traversal mode
Fiber-optic Sensors with Data, the time it takes are no more than a minutes, can meet pipe according to the hardware configuration of cloud server
The demand of road leakage monitoring.
Therefore, the mode used in the embodiment of the present invention for cloud server active drive, passes through the macro of cloud server
Management is seen, issues enabling signal to corresponding optical signal transceiver equipment by setting sequence, and receives light letter according to specific logic
The upload data of number transceiver.
Further, since optical signal transceiver equipment is arranged in pipeline one end, the setting quantity of optical signal transceiver equipment compared with
It is more, and it is complex that position is arranged；In general, optical signal transceiver equipment needs and pipeline is integrally embedded in underground, therefore, entire
In system, being easiest to the part being damaged is optical signal transceiver equipment, needs often to overhaul optical signal transceiver equipment
Or it is replaced；Therefore, in order to simplify optical signal transceiver device structure, the manufacturing cost and maintenance of optical signal transceiver equipment are reduced
Cost, after the optical signal transceiver equipment of the embodiment of the present invention is acquired modulated optical signal, not in local (i.e. optical signal transceiver
Equipment) data processing is carried out, but after only carrying out preliminary analog-to-digital conversion to modulated optical signal, it is packaged as the first feedback signal f1
(t, s) is uploaded to cloud server；First feedback signal f1The specific processing of (t, s) is to carry out on server beyond the clouds.
It should be noted that analog-to-digital conversion herein, which only refers to, carries out preliminary analog-to-digital conversion process to modulated optical signal, just
It is uploaded in being packaged, is not related to the calculating process of modulated optical signal specifically, the actual operation processing of modulated optical signal is beyond the clouds
It is executed on server.
Specifically, synchronously, optical signal transceiver equipment starts to receive after optical signal transceiver equipment issues initial optical signal
Through the modulated feedback signal of distributed fiberoptic sensor, according to optical time domain reflection principle, it is with initial optical signal launch time
Benchmark can determine whether position corresponding to modulated optical signal according to modulated optical signal acquisition time.Correspondingly, according to preset light
The position of signal sending and receiving equipment setting and distributed fiberoptic sensor monitoring distance, can set optical signal transceiver equipment to modulation light
The acquisition time of signal；Persistently modulated optical signal is obtained in the acquisition time of optical signal transceiver equipment, works as acquisition time
After arrival, acquired modulated optical signal is packaged by optical signal transceiver equipment, is uploaded to cloud server.
Therefore, the particular content of feedback signal is receiving time (i.e. time of the optical signal transceiver equipment to modulated optical signal
Node) and modulated optical signal signal value (i.e. modulated optical signal value), optical signal transceiver equipment is uploaded to the of cloud server
One feedback signal f1(t, s) is multiple two dimension values of the composition of modulated optical signal value s corresponding to timing node t and timing node.
By the set-up mode, the circuit structure of optical signal transceiver equipment is greatly simplified, and manufacture maintenance cost reduces, in reality
There is good practicability and economy in the use of border.
In addition, it is contemplated that since there are multiple optical signal transceiver equipment, only when multiple optical signal transceiver equipment will all divide
After the completion of the signal feedback of cloth fibre optical sensor, cloud server can just obtain the complete feelings of sometime entire piping network
Condition.
The distributed fiberoptic sensor as corresponding to the performance difference and optical signal transceiver equipment of optical signal transceiver equipment
Scale difference, optical signal transceiver equipment are different from enabling signal is received to the time it takes among the first feedback signal is uploaded
's；Cloud server it is controllable actively issue enabling signal, by communication speed, communication environment, optical signal transceiver equipment individual
Otherness etc. influences, the function difficult to realize of actively receiving feedback signal.Therefore, in order to for cloud server identification optical signals
The feedback signal that transceiver is returned be it is corresponding with which enabling signal, the embodiment of the invention provides a kind of startings
Signal data pack arrangement and a kind of structure of feedback signal data packet.
Specifically, enabling signal data packet includes at least a sequential identification codes and enabling signal code；Feedback signal data
Packet includes at least a sequential identification codes and the first feedback signal code.
Specifically, sequential identification codes are generated by cloud server, when cloud server needs pass through all optical signal transceivers
When equipment carries out duct size information acquisition, enabling signal data packet can be issued to all optical signal transceiver equipment, it is all to obtain
The feedback information of optical signal transceiver equipment, then it is spliced to form a complete piping network information.
In same primary duct size information collection process, cloud server is opened what all optical signal transceiver equipment issued
The sequential identification codes of dynamic signal data packet are identical；After each optical signal transceiver equipment receives enabling signal data packet, by right
The identification of enabling signal code starts to execute pipe data collection, and after the completion of data acquisition, optical signal transceiver equipment generates feedback
To Cloud Server, the sequential identification codes in return path signal data packet open signal data packet return data with when time acquisition is corresponding
Sequential identification codes in dynamic signal data packet are consistent；When cloud server receives the return path signal of each optical signal transceiver equipment
After data packet, the feedback signal data packet of different optical signal transceiver equipment is subjected to classified finishing based on sequential identification codes, it will be same
The data of one sequential identification codes are considered as the data of same one acquisition, carry out data analysis convenient for cloud server.
It is therefore, optional by the functions of sequential identification codes it is found that at least needing to guarantee that adjacent sequential identification codes twice are different
, sequential identification codes can issue the time of enabling signal data packet or the accumulative operations number of Collecting operation based on cloud server
It is generated, to guarantee the uniqueness of sequential identification codes.
It should be noted that nothing is related to light letter in above-described enabling signal data packet and feedback signal data packet
The content of number transceiver identification is, which is because, the communication overwhelming majority of equipment room is handshake communication mode at present, in data
Before the interaction transmitting of packet, equipment room has realized mutual identity information confirmation and verifying, therefore, cloud server with it is each
Before a optical signal transceiver equipment is communicated, have confirmed that the identity to optical signal transceiver equipment confirms, without passing through
Interactive packet content carries out the identification of equipment, therefore, above-mentioned introduced enabling signal data packet and return path signal data
Nothing is related to the content of equipment identification in packet.Specifically, the handshake communication mode in relation to equipment room, can refer to existing communication skill
Art, the embodiment of the present invention are not set up another length and are introduced.
It should be noted that if not selecting the mode of handshake communication, but with using the non-directive property such as broadcast interaction side
Formula, then enabling signal data packet and feedback signal data packet at least should also include the device code of optical signal transceiver equipment respectively.
S106: cloud server is based on by the first feedback signal f1(t, s) is converted to the second feedback signal f2(L, T),
L is that the distance of the optical signal transceiver equipment, T is on distributed fiberoptic sensor for any position on distributed fiberoptic sensor
Corresponding position temperature；
Server is when data packet receives the first feedback signal based on feedback signal beyond the clouds, first according to sequential identification codes
Feedback signal data packet is classified, the feedback signal data packet with same sequential identification codes is arranged based on classification results
In same storage area, the feedback signal data packet with different order identification code is separated, feedback signal data packet is prevented
Sequence entanglement.
Then the feedback signal code in feedback signal data packet is extracted, the parsing and the place that carry out feedback signal code are started
Reason.
Specifically, firstly the need of by the first feedback signal f1(t, s) is converted to the second feedback signal f2(L, T).
Specifically, firstly, t parameter is converted to L parameter.According to optical time domain reflection principle, can by timing node t to point
The distance parameter L of cloth fibre optical sensor is calculated.Specifically, calculation formula isWherein, segmentum intercalaris when L is t
The distance of position caused by modulated optical signal value to optical signal transceiver equipment is put, c is the light velocity in vacuum, and t is timing node,
IOR is the refractive index of distributed fiberoptic sensor.
Common, distributed fiberoptic sensor is that the temperature effect based on Raman diffused light carries out temperature measurement, when point
When injecting the laser pulse of certain energy and width in cloth fibre optical sensor, it in a fiber onwards transmission while not stopping pregnancy
Raw backward Raman scattering light, the temperature shadow of the intensity of these backward Raman scattering light by place distributed fiberoptic sensor scattering point
It rings and changes (modulation), processing is scattered back the backward Raman light come and can calculate in real time temperature information.
Specifically, Raman is occurring at decanting point length L when the laser pulse of certain energy is injected into optical fiber
It scatters, the relationship between temperature and Raman scattering optical transmission characteristics in optical fiber is represented by
Wherein, in formula: PS、PASRespectively Stokes Raman diffused light and Anti-Stokes Raman scattering optical power；αS、
αASFor the loss factor of Stokes Raman diffused light and Anti-Stokes Raman diffused light；L is that back scattering point arrives end of probe
Fiber lengths；L ' is the calibration fiber lengths being placed under constant temperature TO；H is Planck's constant；K is Boltzmann constant；Δ v is
Scatter frequency displacement wave number.
In the above manner, by the first feedback signal f1(t, s) is converted to the second feedback signal f2(L, T).
Further, it is contemplated that t parameter is discrete value, then final L parameter is also discrete value, in order to be formed along distribution
The continuously distributed f of formula fibre optical sensor2(L, T) function can connect f with directions such as smooth curve, straight lines2It is adjacent in (L, T) function
Two o'clock obtains continuous f2(L, T) function.
S107: the second feedback signal f is analyzed based on the characteristic signal2(L, T) obtains third feedback signal f3(L,
B), b is the state of the distributed fiberoptic sensor along its length；
First using the real-time time of current locale as screening conditions, based on described in leakage event entry-into-force time screening
Event database is revealed, filtered data base is generated；The pipeline leakage event that current time comes into force only is included in filtered data base
And related content.
Traversal is taken to compare the mode of analysis, based on characteristic signal analysis second feedback in the filtered data base
Signal f2(L, T), judge distributed fiberoptic sensor whether generate with pipeline leakage time the same or similar characteristic signal, and
The generation of leakage event is judged whether there is based on this.
When not occurring the leakage time, show that pipeline situation is normal, corresponding position state can remove b=0；
When the event of leakage occurs, based on priority corresponding to the leakage event, generating different state b, b can be pressed
It is set according to incremental manner, if value is that 1,2,3...... numerical value are bigger, the extent of injury that the time is revealed on surface is bigger, priority
It is higher.
In the above manner, can be by the second feedback signal f2(L, T) is converted to third feedback signal f3(L, b).
S108: based on paving mode of the distributed fiberoptic sensor on pipeline, by third feedback signal f3(L, b)
Be converted to the 4th feedback signal f4(a, b), a are the specific location on the pipe surface；
Third feedback signal f3(L, b) is distance L of the certain point away from optical signal transceiver equipment on distributed fiberoptic sensor
With the value of corresponding pipeline predicted state b.It is directed to the paving mode of distributed fiberoptic sensor on the pipe surface not
Together, distance L from pipeline location a there is different corresponding relationships therefore finally to need third feedback signal f3(L, b) conversion
For the 4th feedback function f4(a, b) could generate actually required pipeline leakage real time monitoring signal.
Specifically, a can be the one group of two dimension or three-dimensional coordinate on pipeline, according to the prediction pipeline conditions in step S107
B, produces two dimension or three-dimensional pipeline leakage monitors signal in real time, and specific signal can be two-dimentional piping network figure, three-dimensional
The diversified forms such as pipeline perspective view.
S109: it is based on the 4th feedback signal f4(a, b) generates caution signal and is sent to corresponding reply working group；
In leakage event database, defining respectively to different leakage events has corresponding reply working group, for shape
The timely reply and rationally reply of leakage event in pairs, cloud server is according to the 4th feedback signal f4(a, b), in leakage thing
When part occurs, formed with the corresponding caution signal of leakage event, and the caution signal is sent to to reveal the time corresponding
Cope with working group.
Specifically, caution signal content includes the generation position a of leakage event, and the content of leakage event.
Fig. 4 shows the pipeline leakage monitoring system structure chart of the embodiment of the present invention.Correspondingly, the embodiment of the present invention also mentions
A kind of pipeline leakage monitoring system is supplied, which includes:
Cloud server: for issuing enabling signal to optical signal transceiver equipment, the modulation of optical signal transceiver equipment is received
Optical signal, and after carrying out processing analysis to the modulated optical signal, different degrees of caution signal is formed based on leakage event
And it is sent to corresponding reply working group；
Optical signal transceiver equipment: the enabling signal issued for receiving cloud server generates initial optical signal, receives and adjusts
Optical signal processed is simultaneously uploaded to cloud server；
Distributed fiberoptic sensor: for being modulated optical signal by the initial optical signal modulation treatment.
Fig. 5 shows the optical signal transceiver device structure schematic diagram of the embodiment of the present invention.Optionally, optical signal transceiver equipment
Including light source, photo-coupler, optical splitter, two optical filters corresponding with stokes light and anti-Stokes light, two
Analog-digital converter and Acquisition Processor.Acquisition Processor receives the enabling signal that cloud server issues, and starts to drive light source hair
One section of pulse light and synchronously start the acquisition of modulated optical signal out；Pulse light enters distribution type fiber-optic through photo-coupler and passes
Sensor, the modulated optical signal of distributed fiberoptic sensor enter optical splitter through photo-coupler simultaneously, by stokes light and it is anti-this
The separation of lentor light；Stokes light and anti-Stokes light are respectively after optical filter and analog-digital converter, by acquisition process
Device packing is uploaded to cloud server
The embodiment of the invention provides a kind of pipeline leakage monitoring method and system, this method is set by event database
It sets, leakage event can be accurately identified；By the setting of sequential identification codes, the modulated optical signal of different moments measurement can recognize；It is logical
The set-up modes such as d-t database are crossed, the data processing speed of cloud server is accelerated, event recognition effect fast with processing speed
The optical signal transceiver device structure of the good feature of fruit, the system is simple, and production and maintenance cost are lower, is conducive to extensive general
And application, there is good practicability in actual use.
A kind of pipeline leakage monitoring method and system are provided for the embodiments of the invention above to be described in detail, this
Apply that a specific example illustrates the principle and implementation of the invention in text, the explanation of above example is only intended to
It facilitates the understanding of the method and its core concept of the invention；At the same time, for those skilled in the art, think of according to the present invention
Think, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification should not be construed as pair
Limitation of the invention.
Claims (10)
1. a kind of pipeline leakage monitoring method, which is characterized in that the described method comprises the following steps:
Building leakage event database on server beyond the clouds, the leakage event database includes leakage event and the leakage
Characteristic signal corresponding to event；
Enabling signal is issued to optical signal transceiver equipment based on cloud server and receives what the optical signal transceiver equipment uploaded
First feedback signal f1(t, s), t are the timing node that optical signal transceiver equipment receives modulated optical signal, and s is corresponding timing node
Modulated optical signal value；
Based on cloud server by the first feedback signal f1(t, s) is converted to the second feedback signal f2(L, T), L are distribution
To the distance of the optical signal transceiver equipment, T is corresponding position on distributed fiberoptic sensor for any position on fibre optical sensor
Temperature；
The second feedback signal f is analyzed based on the characteristic signal2(L, T) obtains third feedback signal f3(L, b), b are institute
State the state of distributed fiberoptic sensor along its length；
Paving mode based on the distributed fiberoptic sensor on pipeline, by third feedback signal f3(L, b) is converted to the 4th
Feedback signal f4 (a, b), a are the specific location on the pipe surface；Based on the 4th feedback signal f4 (a, b), generate
Pipeline leakage real time monitoring signal.
2. pipeline leakage monitoring method as described in claim 1, which is characterized in that the leakage event database further include:
The leakage event entry-into-force time；
Priority corresponding to leakage event；
Reply working group corresponding to leakage event.
3. pipeline leakage monitoring method as claimed in claim 2, which is characterized in that described to analyze institute based on the characteristic signal
State the second feedback signal f2(L, T) obtains third feedback signal f3(L, b) the following steps are included:
Using real-time time as screening conditions, the leakage event database is screened based on the leakage event entry-into-force time, is generated
Filtered data base；
The second feedback signal f is analyzed based on the characteristic signal in the filtered data base2(L, T), judges whether pipeline occurs
Leakage event in the filtered data base；
When the event of leakage occurs, based on priority corresponding to the leakage event, different state b, the second feedback are generated
Signal f2(L, T) is converted to third feedback signal f3(L, b).
4. pipeline leakage monitoring method as claimed in claim 2, which is characterized in that the method also includes following steps:
When the event of leakage occurs, cloud server generates caution signal and is sent to reply work corresponding to the leakage event
Make group.
5. pipeline leakage monitoring method as described in claim 1, which is characterized in that described to issue starting based on cloud server
Signal is to optical signal transceiver equipment and receives the first feedback signal f that the optical signal transceiver equipment uploads1(t, s) includes following
Step:
Enabling signal is issued to optical signal transceiver equipment based on cloud server；
The optical signal transceiver equipment generates initial optical signal and is directed into distributed fiberoptic sensor；
The distributed fiberoptic sensor forms modulated optical signal after being modulated to the initial optical signal；
The timing node t for receiving modulated optical signal is packaged by the optical signal transceiver equipment with corresponding modulated optical signal value s,
Generate the first feedback signal f1(t, s) and it is uploaded to cloud server.
6. pipeline leakage monitoring method as claimed in claim 5, which is characterized in that the modulated optical signal value includes Stokes
Raman diffused light power PSWith Anti-Stokes Raman diffused light power PAS。
7. pipeline leakage monitoring method as claimed in claim 5, which is characterized in that the first feedback signal f1 (t, s) and second
Transformational relation between feedback signal f2 (L, T) are as follows:
C is the light velocity in vacuum, and t is timing node, and IOR is the refractive index of distributed fiberoptic sensor；
PS、PASRespectively Stokes Raman diffused light and Anti-Stokes Raman scattering optical power；αS、αASFor Stokes Raman
Scatter the loss factor of light and Anti-Stokes Raman diffused light；L ' is the calibration fiber lengths being placed under constant temperature T0；H is
Planck's constant；K is Boltzmann constant；Δ v is scattering frequency displacement wave number.
8. pipeline leakage monitoring method as claimed in claim 5, which is characterized in that the cloud server is based on enabling signal
Data packet issues enabling signal to optical signal transceiver equipment, and data packet uploads institute to the optical signal transceiver equipment based on feedback signal
The first feedback signal is stated to cloud server；
The enabling signal data packet includes a sequential identification codes；The feedback signal data packet includes and corresponding enabling signal number
According to the identical sequential identification codes of the sequential identification codes of packet.
9. pipeline leakage monitoring method as described in claim 1, which is characterized in that the characteristic signal includes:
The temporal characteristics signal of single distributed fiberoptic sensor；
The continuous characteristic signal of single distributed fiberoptic sensor；
The temporal characteristics signal of multiple distributed fiberoptic sensors；
The continuous characteristic signal of multiple distributed fiberoptic sensors.
10. a kind of pipeline leakage monitoring system characterized by comprising
Cloud server: for issuing enabling signal to optical signal transceiver equipment, the modulation light letter of optical signal transceiver equipment is received
Number, and after carrying out processing analysis to the modulated optical signal, it is concurrent that different degrees of caution signal is formed based on leakage event
It send to corresponding reply working group；
Optical signal transceiver equipment: the enabling signal issued for receiving cloud server generates initial optical signal, receives modulation light
Signal is simultaneously uploaded to cloud server；
Distributed fiberoptic sensor: for being modulated optical signal by the initial optical signal modulation treatment.
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