CN106840363B - A kind of defeated buried pipeline load identification of length and safety monitoring system - Google Patents
A kind of defeated buried pipeline load identification of length and safety monitoring system Download PDFInfo
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- CN106840363B CN106840363B CN201710171798.XA CN201710171798A CN106840363B CN 106840363 B CN106840363 B CN 106840363B CN 201710171798 A CN201710171798 A CN 201710171798A CN 106840363 B CN106840363 B CN 106840363B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
- G01H9/006—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors the vibrations causing a variation in the relative position of the end of a fibre and another element
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geophysics And Detection Of Objects (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
A kind of defeated buried pipeline load identification of length and safety monitoring system, distributed optical fiber vibration test macro acquires the vibration signal on the distributed optical fiber vibration sensor being laid with long defeated buried pipeline with ditch in real time, the load sample space that vibration signal discriminance analysis system passes through comparison itself, identify the load type acted on buried pipeline ground, load and the load frequency, the load information identified is transferred to buried pipeline safety evaluation center and is analyzed, physical property based on Pipeline Ground, analyze pipeline stress and deformation behaviour under the load action, pipe safety is evaluated.The present invention realizes the distributed on line monitoring identification of long defeated buried pipeline ground imposed load, and the Mechanical Characters of Composite Ground of pipeline under imposed load is determined based on buried pipeline foundation parameter, pipe safety is evaluated, the long defeated buried pipeline structure damage monitoring of kilometers up to a hundred can be achieved, improve the long-term safety operation of buried pipeline.
Description
Technical field
The invention belongs to important energy source installation securities to monitor field, and in particular to a kind of length based on distributed vibration optical fiber
Defeated buried pipeline load identification and safety monitoring system.
Background technique
With growing fast and steadily for China's economy and flourishing for petroleum industry, the pipe-line construction engineering in China is obtained
Significant progress.By in August, 2015, Chinese Land petroleum pipeline total kilometrage has reached 120,000 kilometers, wherein crude oil pipeline
About 2.3 ten thousand kilometers, about 2.1 ten thousand kilometers of processed oil pipeline, about 7.6 ten thousand kilometers of natural gas line.These important energy conduit shapes
At China across thing, stretch from the north to the south, be connected to overseas Oil/Gas Pipe grid office, become the important life for pushing China's economic development
Order line.Since buried pipeline has wire length, wide characteristic distributions, the geological environment of various complexity is inevitably passed through, is made
Complicated with the load type multiplicity on Pipeline Ground, such as traffic fatigue load, landslide account for pressure, illegal excavation, earthquake
Deng.Buried pipeline Mechanical Characters of Composite Ground and institute's bearing load type are closely related, as to easily lead to ground (especially soft for traffic fatigue load
Soil base) sedimentation, once it can cause to pass through buried pipeline large deformation or even bursting accident occurs more than allowable strain value；Massif
Landslide will lead to the Pipeline Ground soil body because failure by shear and volume expansion generate irreversible deformation, and buried pipeline can corresponding real estate
Raw uneven offset, and then destroy.Therefore, by identification pipeline load (including load type, load and
Act on frequency etc.), its Mechanical Characters of Composite Ground is analyzed, carrying out safety evaluation to pipeline is particularly important.
Defeated buried pipeline safety monitoring is grown at present first is that determining load to the shadow of mechanics of piping character by theory analysis
It rings, and then evaluates its safe condition.For example traffic loading easily leads to ground (especially soft soil foundation) sedimentation, once it is more than to allow
Deformation values can cause the buried pipeline passed through deformation even bursting accident.Some scholars are to soft soil foundation buried pipeline traffic lotus
Mechanical Characters of Composite Ground under carrying has carried out theoretical research, proposes three kinds of long-term evenly load, traveling load and steady-state harmonic load lotuses
It carries model and the Mises stress of pipeline and vertical displacement has been carried out to calculate analysis, propose in engineering design and apply based on this
The measure of pipeline protection and based process in work.The load type randomness acted on pipeline in Practical Project is strong, and pipeline
It is very severe to pass through geographical environment, is not easy directly to determine imposed load type to field observation, it can only be in limited several pipelines
Carry out the monitoring pipeline safety of such method；Second is that laying strain transducer in pipe surface, pipeline configuration stress is directly acquired
Strain carries out safe evaluation to pipeline, but for in-service pipeline, especially buried pipeline, and needing to excavate Pipeline Ground will be distributed
Formula strain transducer is laid on pipeline, and to ensure sensor and pipeline cooperative transformation, is monitored if you need to pipeline overall length, then people
Power, financial resources are at high cost, and sensor, which is laid, requires height.Distributed vibration optical fiber sensor transmits phase using light wave in a fiber
Position, polarization etc. can continuously monitor vibration caused by various loads in real time, be widely used in supervising to the characteristic of vibration sensing
The circumference in the places such as prison, bank, airport, military area monitors.Distributed optical fiber vibration sensing technology is in the defeated buried pipeline of length at present
It is anti-to excavate, have a kind of relevant report (Chinese invention patent: Fibre Optical Sensor natural gas line leakage system in stolen early warning and monitoring
The leak point positioning method and system of system, patent No. CN201110272440.9), but use the technology to the defeated buried pipeline of length
Imposed load carries out load identification and the corresponding Safety Assessment Methods of development yet there are no relevant report.In pipe safety evaluation side
The stress of goaf pipeline is analyzed and is passed through at present in face about the pipe stress under action of traffic loading in the Research Literature of part
Analyze document: " buried pipeline stress analysis and on-the-spot test under Li Xinliang, Li Suzhen action of traffic loading, Zhejiang Polytechnical University
Journal, 2014,48 (11): 1976-1981 "；" Yang Xiaohui, the analysis of the goaf Zhao Zilong buried pipeline sedimentation and deformation, Taiyuan section
Skill college journal, 2016,37 (2): 134-137 ", but its research is on condition that it is assumed that carry out evaluation under certain determination load situation
, rather than identify that load carries out the analysis of pipeline true stress and evaluation by field monitoring.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of defeated buried pipeline load identification of length and safety monitoring system.
The load identification and safety monitoring system are based on distributed vibration optical fiber sensing technology, act directly on long defeated buried pipeline ground
On load generate vibration, vibration by ground is transferred to the distributed optical fiber vibration sensor being laid with long distance pipeline with ditch
On, distributed optical fiber vibration test cell acquires the vibration signal of distributed optical fiber vibration sensor perception, vibration signal in real time
It is transmitted to vibration signal discriminance analysis unit to be handled, identifies load type, size and the effect frequency on Pipeline Ground,
The mechanical characteristics of long defeated buried pipeline, carry out the defeated buried pipeline of length under physical property dissection load based on Pipeline Ground
Safety evaluation.
In order to achieve the above objectives, the technical solution of the present invention is as follows:
A kind of defeated buried pipeline load identification of length and safety monitoring system, including distributed optical fiber vibration sensor 1, transmission
Optical cable 2, distributed optical fiber vibration test cell 3, vibration signal discriminance analysis unit 4 and the long defeated safe evaluation unit of buried pipeline
5；It is characterized by:
Distributed optical fiber vibration sensor 1 and long defeated buried pipeline are laid with ditch, and load action generates on Pipeline Ground
Vibration, vibration information are propagated in ground on distributed optical fiber vibration sensor 1；
Distributed optical fiber vibration test cell 3 on transmission cable 2 in real time acquisition distributed optical fiber vibration sensor 1 by feeling
The vibration information known, and vibration information collected is transmitted to vibration signal discriminance analysis unit 4；
The vibration signal discriminance analysis unit 4 identifies load information according to vibration information, and the load identified is believed
Breath is transferred to the long defeated safe evaluation unit 5 of buried pipeline, and the safe evaluation unit 5 of the defeated buried pipeline of length is according to the lotus received
The stress and deformation for carrying pipeline under the information analysis load action, evaluate pipe safety.
The present invention further comprises following preferred embodiment:
The distributed optical fiber vibration sensor 1 both can be the individual distribution being laid with the defeated buried pipeline of length with ditch
Optical fibre vibration sensor, or the redundancy single mode optical fiber in communication cable being laid with the defeated buried pipeline of length with ditch.
The distributed optical fiber vibration sensor 1 is laid with long defeated buried pipeline with ditch, is laid with spacing and is less than 1m.
The distributed optical fiber vibration test cell 3 is directly acquired in pipeline by distributed optical fiber vibration sensor 1
Vibration information caused by various imposed loads on base, and vibration information is pre-processed, the acquisition with not imposed load
Signal carry out differential analysis, only the vibration information of obvious vibration mutation signal is preserved in acquisition.
The identified load information of the vibration signal discriminance analysis unit 4 includes load type, size and is counted
The load action frequency.
Load sample space is stored in advance in the vibration signal discriminance analysis unit 4, when vibration signal discriminance analysis unit 4
After collecting the vibration information that distributed optical fiber vibration sensor 1 is perceived, to vibration information carry out energy spectrum analysis, and with it is pre-
The energy spectrum of the load sample space first stored is compared, and identifies load type and size, while to the load action frequency
It is counted.
The load sample space carries out simulation foundation in laboratory or open air in advance, is generated according to different load cases
Vibration information carries out energy spectrum analysis, establishes energy spectrum and load type and load one-to-one relationship.
Wherein, the load type include different grades of vehicular load, it is different types of account for pressure load, gob collapse
Load etc..
The vibration signal discriminance analysis unit 4 further comprises self-teaching update module, when certain imposed load generates
Vibration information not in pre-stored load sample space when, vibration information discriminance analysis unit 4 by self-teaching more
New module according to field observation load and analyze come energy spectrum information, establish energy spectrum and load type and load one
One corresponding relationship, and the corresponding relationship is increased in load sample space.
Physical property and received load letter of the safe evaluation unit 5 of the defeated buried pipeline of length based on Pipeline Ground
It ceases, the mechanical characteristics of long defeated buried pipeline under dissection load carry out safe evaluation to the defeated buried pipeline of length.Long defeated underground pipe
Evaluation relates generally to the following safely in road: being primarily based on the ground of pipeline and the physical property of pipeline, establishes buried pipeline power
Learn model；The load that next load that will identify that is calculated as pipeline；Finally, under the theory analysis calculating load pipeline it is true
Real Mechanical Characters of Composite Ground evaluates the degree of impairment of pipeline.
It is applied to and long defeated underground pipe the invention has the advantages that distributed optical fiber vibration test macro acquires in real time
The vibration signal on distributed optical fiber vibration sensor that road is laid with ditch, vibration signal discriminance analysis system compare itself load
Sample space identifies load type, size according to vibration signal energy spectrogram and counts the load action frequency, based on pipeline
The mechanical characteristic of pipeline, the safety monitoring of buried pipeline defeated for length and assessment tool under base physical property analysis identification load action
It is significant.
Detailed description of the invention
Fig. 1 is based on the long defeated buried pipeline load identification of the present invention and safety monitoring system structural schematic diagram
Fig. 2 is vibration signal discriminance analysis cell operation schematic diagram；
1 distributed optical fiber vibration sensor；2 transmission cables；3 distributed optical fiber vibration test cells；The identification of 4 vibration signals
Analytical unit；The 5 long defeated safe evaluation units of buried pipeline.
Specific embodiment
A specific embodiment of the invention is described in detail below in conjunction with technical solution and attached drawing.
Attached drawing 1 is the defeated buried pipeline load identification of length and safety monitoring method based on distributed vibration optical fiber.It is specific real
The mode of applying is distributed optical fiber vibration sensor 1 and long defeated buried pipeline with ditch laying, or directly will be same with the defeated buried pipeline of length
The redundancy single mode optical fiber in communication cable that ditch is laid with shakes as distributed optical fiber vibration sensor 1, pipeline and distribution type fiber-optic
The spacing of dynamic sensor 1 is less than 1m；Load action generates vibration on Pipeline Ground, and vibration signal is transmitted to distribution through ground
Optical fibre vibration sensor 1, distributed fiberoptic sensor 1 perceive vibration information.Distributed optical fiber vibration sensor 1 and transmission cable
2 connections, transmission cable 2 access distributed optical fiber vibration test cell 3, and distributed optical fiber vibration test cell 3 passes through transmission light
Cable 2 acquires the vibration signal perceived on distributed optical fiber vibration sensor 1 in real time, and makees to the vibration signal of acquisition and non-load
Signal under carries out difference, saves the signal being obviously mutated again after difference, and the signal of preservation is transmitted to vibration signal and is known
Other analytical unit 4 is handled, and vibration signal discriminance analysis unit 4 carries out energy spectrum analysis to vibration information and compares itself lotus
The sample for carrying sample space, identifies load type, size and counts the load action frequency.The load information identified is transferred to
The long defeated safe evaluation unit 5 of buried pipeline, physical property and received load information based on Pipeline Ground, dissection
The mechanical characteristics of long defeated buried pipeline under load, carry out safe evaluation to the defeated buried pipeline of length.
Attached drawing 2 is vibration signal discriminance analysis system operation schematic diagram.Specific embodiment is in advance at laboratory or family
The proposed vertical conventional load test of external mold, such as different grades of vehicular load (are labeled as vehicular load -1, vehicular load -2 ..., vehicle
Load-n), it is different types of to account for pressure load (label is pressure load -1 in figure, accounts for pressure load -2 ..., accounts for pressure load-m),
Gob collapse load and other imposed loads, various finder charges are acted on Pipeline Ground, distributed optical fiber vibration
Test cell 3 acquires the vibration signal that various imposed loads generate in real time, carries out corresponding energy spectrum analysis to vibration signal, builds
The corresponding relationship of vertical oscillatory load and energy spectrum, various corresponding relationships constitute load sample space.In actual monitoring, distributed light
Fine vibration-testing unit 3 acquires various vibration signals, and (vehicular load-i in such as figure accounts for pressure load-j or gob collapse lotus
Carry), vibration signal is transmitted to analysis of vibration signal recognition unit 4 (referring to attached drawing 1), analysis of vibration signal recognition unit 4 is first
Energy spectrum analysis first is carried out to vibration signal, then the energy spectrum sample in contrast sample space, identifies phase if matching
Load type, size and the statistics load action frequency answered；If it does not match, establishing the pass of new oscillatory load and energy spectrum
System, and be added in sample space, update load identification sample space.
Long defeated buried pipeline pumped (conveying) medium can be oil, gas or water in the present invention；Distributed optical fiber vibration sensor 1 can be
A redundancy single mode optical fiber in the communication cable being laid with the defeated buried pipeline of length with ditch, can also be in the defeated buried pipeline 1m of distance
Ditching and laying distributed optical fiber vibration sensor 1 in range.
Claims (5)
1. a kind of defeated buried pipeline load identification of length and safety monitoring system, including distributed optical fiber vibration sensor (1), transmission
Optical cable (2), distributed optical fiber vibration test cell (3), vibration signal discriminance analysis unit (4) and long defeated buried pipeline are commented safely
Order member (5)；It is characterized by:
Distributed optical fiber vibration sensor (1) and long defeated buried pipeline are laid with ditch, are laid with spacing and are less than 1m, load action is in pipe
Vibration is generated on road ground, vibration information is propagated in ground on distributed optical fiber vibration sensor (1)；
Distributed optical fiber vibration test cell (3) is acquired on distributed optical fiber vibration sensor (1) in real time by transmission cable (2)
The vibration information of perception, and vibration information collected is transmitted to vibration signal discriminance analysis unit (4)；
Load sample space is stored in advance in the vibration signal discriminance analysis unit (4), when vibration signal discriminance analysis unit (4)
After collecting the vibration information that distributed optical fiber vibration sensor (1) is perceived, to vibration information progress energy spectrum analysis, and with
The energy spectrum of pre-stored load sample space is compared, and identifies load type and size, while to load action frequency
It is secondary to be counted；
The vibration signal discriminance analysis unit (4) identifies load information, and the load information that will be identified according to vibration information
It is transferred to the long defeated safe evaluation unit of buried pipeline (5), the safe evaluation unit of the defeated buried pipeline of length (5) basis receives
The stress and deformation of pipeline, evaluate pipe safety under the load information analysis load action, wherein the vibration signal
The identified load information of discriminance analysis unit (4) includes load type, size and the load action frequency counted；
The load sample space carries out simulation foundation in laboratory or open air in advance, the vibration generated according to different load cases
Information carries out energy spectrum analysis, establishes energy spectrum and load type and load one-to-one relationship；
In actual monitoring, distributed optical fiber vibration test cell (3) acquires various vibration signals, and vibration signal is transmitted to vibration
Signal analyzes recognition unit (4), and analysis of vibration signal recognition unit (4) carries out energy spectrum analysis to vibration signal first, then
Energy spectrum sample in contrast sample space identifies corresponding load type, size and statistics load action if matching
The frequency；If it does not match, establishing the relationship of new oscillatory load and energy spectrum, and it is added in sample space, updates load
Identify sample space.
2. the defeated buried pipeline load identification of length according to claim 1 and safety monitoring system, it is characterised in that:
The distributed optical fiber vibration sensor (1) both can be the individual distributed light being laid with the defeated buried pipeline of length with ditch
Fine vibrating sensor, or the redundancy single mode optical fiber in communication cable being laid with the defeated buried pipeline of length with ditch.
3. the defeated buried pipeline load identification of length according to claim 1 or 2 and safety monitoring system, it is characterised in that:
The vibration signal of distributed optical fiber vibration test cell (3) acquisition distributed optical fiber vibration sensor (1) perception, and
Signal under vibration signal and non-loading cracks is subjected to difference, saves the vibration signal that difference is greater than setting Sudden Changing Rate, then
It is transmitted to vibration signal discriminance analysis unit (4).
4. the defeated buried pipeline load identification of length according to claim 1 and safety monitoring system, it is characterised in that:
The vibration signal discriminance analysis unit (4) further comprises self-teaching update module, is generated when certain imposed load
When vibration information is not in pre-stored load sample space, vibration information discriminance analysis unit (4) passes through self-teaching more
New module according to field observation load and analyze come energy spectrum information, establish energy spectrum and load type and load one
One corresponding relationship, and the corresponding relationship is increased in load sample space.
5. the defeated buried pipeline load identification of length according to claim 1 and safety monitoring system, it is characterised in that:
Physical property and received load letter of the safe evaluation unit of the defeated buried pipeline of length (5) based on Pipeline Ground
It ceases, the mechanical characteristics of long defeated buried pipeline under dissection load carry out safe evaluation to the defeated buried pipeline of length；
The safe evaluation unit of the defeated buried pipeline of the length is primarily based on the ground of pipeline and the physical property of pipeline, establishes buried
Mechanics of piping model；The load that next load that will identify that is calculated as pipeline；Finally, the theory analysis calculating load down tube
The true Mechanical Characters of Composite Ground in road, evaluates the degree of impairment of pipeline.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107340380A (en) * | 2017-07-10 | 2017-11-10 | 武汉科技大学 | Goaf simulation test device for stability under a kind of mechanical execution load action |
| CN108229016A (en) * | 2017-12-29 | 2018-06-29 | 杭州杉石科技有限公司 | Electronic system arrangement method and device based on sequence graph model |
| CN108445934B (en) * | 2018-02-08 | 2020-04-28 | 衡阳泰豪通信车辆有限公司 | Method for realizing multi-station real-time cooperative control |
| CN108535771B (en) * | 2018-04-26 | 2023-11-21 | 中国标准化研究院 | Underground pipeline earthquake monitoring system and simulation experiment device |
| CN109708008B (en) * | 2019-01-23 | 2019-11-05 | 北京市燃气集团有限责任公司 | Monitoring pipeline safety and method for early warning |
| CN111307055B (en) * | 2020-03-03 | 2024-03-05 | 成都管力安科技有限公司 | Design method of pipeline digital twin system |
| CN114323246A (en) * | 2021-12-17 | 2022-04-12 | 北京特里尼斯石油技术股份有限公司 | Pipeline safety monitoring method and device |
| CN115235421A (en) * | 2022-08-19 | 2022-10-25 | 中铁一局集团市政环保工程有限公司 | Pipeline settlement monitoring device based on distributed optical fiber |
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| US8553221B2 (en) * | 2006-10-24 | 2013-10-08 | Pd-Ld, Inc. | Compact, low cost Raman monitor for single substances |
| CN201273456Y (en) * | 2008-09-27 | 2009-07-15 | 中国石油天然气股份有限公司 | Stress wave and optical fiber sensing compound pipe security early-warning system |
| CN103206615A (en) * | 2013-03-26 | 2013-07-17 | 中国地质调查局水文地质环境地质调查中心 | Optical fiber deformation monitoring system for oil and gas pipelines |
| CN104153981B (en) * | 2014-02-19 | 2017-02-15 | 东南大学 | Method for estimating backpressure data during starting and stopping of power station circulating water pump |
| CN103900743A (en) * | 2014-04-08 | 2014-07-02 | 天津思博科科技发展有限公司 | Underground pipeline safety monitoring device based on stress induction technology |
| CN105318198B (en) * | 2014-07-30 | 2017-10-10 | 中国特种设备检测研究院 | The distributed monitoring system and monitoring method of long distance pipeline Crossover phase strain |
| CN105695997A (en) * | 2016-03-08 | 2016-06-22 | 陈久会 | Safety protection method for underground metal pipeline |
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