CN106958742A - The optical fiber grating sensing pipeline health monitoring systems of many reference amounts - Google Patents
The optical fiber grating sensing pipeline health monitoring systems of many reference amounts Download PDFInfo
- Publication number
- CN106958742A CN106958742A CN201710136943.0A CN201710136943A CN106958742A CN 106958742 A CN106958742 A CN 106958742A CN 201710136943 A CN201710136943 A CN 201710136943A CN 106958742 A CN106958742 A CN 106958742A
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- Prior art keywords
- pipeline
- optical fiber
- grating
- sensor
- leakage
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Classifications
-
- 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
- F17D5/02—Preventing, monitoring, or locating loss
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
The present invention relates to a kind of optical fiber grating sensing pipeline health monitoring systems of many reference amounts, including fiber-optic grating sensor, terminal box, grating fibers (FBG) demodulator, data handling system and on-line monitoring system, optical fiber raster flow sensor is installed at the key node of pipeline main line and branch line, fiber bragg grating pressure sensor is installed close to valve and pipe bent position in pipeline, for the pipeline not being embedded to, fiber grating acoustic emission sensor is installed on valve and pipe bent position outer wall in pipeline, when the fiber Bragg grating strain sensor circumferentially around arrangement being installed at certain intervals on pipeline outer wall axial direction to monitor No leakage the stress distribution of pipeline outer wall and during leakage caused by suction wave pipeline outer wall strain, for the pipeline of embedment, in pipeline laying optical fiber grating temperature measuring optical cable, the laying optical fiber grating anti-intrusion optical cable above pipeline.The system can monitor different kinds of parameters and judge a variety of health status of pipeline, and leakage accuracy of judgement degree is high.
Description
Technical field
The invention belongs to Monitoring Pinpelines field, and in particular to a kind of optical fiber grating sensing pipeline health monitoring system of many reference amounts
System.
Background technology
Pipeline is widely used in the laying of transport and the power cable of oil, gas and water etc. etc., and the health status of pipeline is determined
The service life and rate of breakdown of pipeline, in order to reduce rate of breakdown, it is necessary to carry out health monitoring to pipeline.
Current pipeline health monitoring, is often confined to monitor whether leakage, for remaining health status monitoring simultaneously
Think little of, but the leakage of pipeline is result of the Accumulative damage by quantitative change to qualitative change, simply monitors whether leakage, can not
Play a part of preventing in advance, moreover, the judgement leaked at present is the appearance based on suction wave, but in pipeline transportation process
In, the poised state of the first terminal Parameters of pipeline can also be influenceed by transmitting the change (such as opening pump, termination of pumping, regulation flow valve) of operating mode,
So as to cause the appearance of suction wave, the appearance suction wave can not be distinguished be caused by pipe leakage or normal operating,
Therefore, the appearance only by NPW judges whether that very big error will be produced by occurring leakage.
The content of the invention
It is an object of the invention to provide a kind of optical fiber grating sensing pipeline health monitoring systems of many reference amounts, the system can be with
Monitoring different kinds of parameters and a variety of health status for judging pipeline, leakage accuracy of judgement degree are high.
The technical solution adopted in the present invention is：
A kind of optical fiber grating sensing pipeline health monitoring systems of many reference amounts, are monitored for multiple parameters to pipeline
And health state evaluation is carried out to pipeline by the parameter of collection, including the fiber-optic grating sensor that is distributed on pipeline and with
Terminal box, grating fibers (FBG) demodulator, data handling system and on-line monitoring system that fiber-optic grating sensor is sequentially connected；In pipe
At the key node of road main line and branch line inside install optical fiber raster flow sensor, in pipeline inside valve and pipe bent position
Fiber bragg grating pressure sensor is installed, judges no by the flow of monitoring and the situation of change of pressure and the distribution condition of flow
There is leakage；For the pipeline not being embedded to, fiber grating acoustic emission sensor is installed on valve and pipe bent position outer wall in pipeline,
Leakage is determined whether by the leakage sound wave of monitoring, installed at certain intervals circumferentially around arrangement on pipeline outer wall axial direction
Pipeline caused by suction wave when fiber Bragg grating strain sensor is to monitor the stress distribution of pipeline outer wall and leakage during No leakage
The strain of outer wall, the position of stress distribution gradient mutation is exactly the region of crackle or corrosion；For the pipeline of embedment, in pipeline week
Cloth sets optical fiber grating temperature-measuring optical cable, determines whether leakage by the change in the temperature field of monitoring, light is laid above pipeline
Fine grating anti-intrusion optical cable, invasion is determined whether by the medium deformation of monitoring.
Further, for the pipeline not being embedded to, by fiber bragg grating pressure sensor, fiber grating acoustic emission sensor and
The parameter that fiber Bragg grating strain sensor is collected determines whether leakage using adaptive weighted Fusion Estimation Algorithm.
Further, when the stress, strain that fiber Bragg grating strain sensor is monitored exceed safety margins, police is automatically initiated
Report.
Further, fiber grating acoustic emission sensor is arranged on pipeline outer wall by magnet, is removed and is installed before installing
It is coarse on loose coating and oxide skin, the greasy dirt in cleaning installation surface and unnecessary material, polishing installation surface on surface
Place, acoustic couplant is filled after installation in contact position.
Further, optical fiber raster flow sensor two ends carry flange, and optical fiber raster flow sensor is pacified by flange
On pipeline.
Further, fiber bragg grating pressure sensor is threadably mounted on the spare interface of pipeline by sealing.
Further, fiber Bragg grating strain sensor is pasted onto pipe surface by epoxy resin glue.
The beneficial effects of the invention are as follows：
1. the present invention can monitor the temperature of flow, pressure, leakage sound wave, stress and strain and the pipeline of pipeline
The different kinds of parameters such as field and medium deformation, and the healthy shape such as leakage, invasion, crackle, burn into stress and strain of pipeline is judged accordingly
Stress at state, crackle or corrosion can reflect the order of severity of crackle or corrosion, and the stress at common position can reflect pipe
Road bears state, to investigate and overhaul there is provided reference frame；The present invention passes through flow, pressure, leakage sound wave, strain, temperature
Multiple parameters such as degree field determine whether leakage, and fully eliminating normal operating, (pipeline start and stop are defeated, start and stop pump, increase and decrease throughput rate, tune
Pressure etc.) produce influence, improve the degree of accuracy of judgement；The present invention is high using fiber-optic grating sensor measurement accuracy.
Any priori 2. adaptive weighted Fusion Estimation Algorithm should not seek knowledge, it is only necessary to provided by each sensor
Measurement data, the optimal weighted factor corresponding to each sensor is found in an adaptive way, so as to draw mean square error
Poor minimum information fusion value, eliminates the influence of accidentalia, further increases the degree of accuracy of judgement.
3. when stress, strain exceed safety margins, it is more likely that damage pipeline, alarm is automatically initiated, can be arranged in time
Inspection is repaiied.
4. installation surface cleaning, contact position are close, it is ensured that the good sound transmission.
Brief description of the drawings
Fig. 1 is the schematic diagram of the embodiment of the present invention.
Fiber-optic grating sensor distribution map on pipeline in Fig. 2 embodiment of the present invention.
In figure：1- optical fiber raster flow sensors I；2- fiber bragg grating pressure sensors I；3- fiber grating voice sending sensors
Device I；4- fiber Bragg grating strain sensors I；5- fiber Bragg grating strain sensors II；6- fiber Bragg grating strain sensors III；7- light
Fiber grating strain transducer IV；8- fiber grating acoustic emission sensors II；9 fiber bragg grating pressure sensor II；10- fiber gratings
Pressure sensor III；11- fiber grating acoustic emission sensors III；12- fiber Bragg grating strain sensors V；13- fiber gratings should
Become sensor VI；14- fiber Bragg grating strain sensors VII；15- fiber Bragg grating strain sensors VIII；16- fiber gratings sound is sent out
Penetrate sensor IV；17- fiber bragg grating pressure sensors IV；18- fiber bragg grating pressure sensors V；The sound emission of 19- fiber gratings is passed
Sensor V；20- fiber Bragg grating strain sensors IX；21- fiber Bragg grating strain sensors X；22- fiber Bragg grating strain sensors XI；
23- fiber Bragg grating strain sensors XII；24- fiber grating acoustic emission sensors VI；25- fiber bragg grating pressure sensors VI；
26- optical fiber raster flow sensors II；27- fiber bragg grating pressure sensors VII；28- fiber grating acoustic emission sensors VII；
29- fiber Bragg grating strain sensors XIII；30- fiber Bragg grating strain sensors XIV；31- fiber Bragg grating strain sensors XV；
32- fiber Bragg grating strain sensors XVI；33- fiber grating acoustic emission sensors VIII；34- fiber bragg grating pressure sensors
VIII；35- optical fiber raster flow sensors III；36- optical fiber grating temperature-measuring optical cables I；37- fiber grating anti-intrusion optical cables；38-
Optical fiber grating temperature-measuring optical cable II；39- optical fiber raster flow sensors IV；40- distributed fiber grating strain transducers I；41- points
Cloth fiber Bragg grating strain sensor II；42- distributed fiber grating strain transducers III；43- distributed fiber gratings are strained
Sensor IV；44- distributed fiber grating strain transducers V.
Embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of optical fiber grating sensing pipeline health monitoring systems of many reference amounts, for multiple ginsengs to pipeline
Amount is monitored and health state evaluation is carried out to pipeline by the parameter of collection, including the fiber grating being distributed on pipeline is passed
Sensor and the terminal box being sequentially connected with fiber-optic grating sensor, grating fibers (FBG) demodulator, data handling system and online prison
Examining system, as shown in Fig. 2 installing optical fiber raster flow sensor inside at the key node of pipeline main line and branch line, in pipe
Fiber bragg grating pressure sensor is installed in road inside valve and pipe bent position, by the flow of monitoring and the situation of change of pressure with
And the distribution condition of flow judges no there is leakage；For the pipeline not being embedded to, pacify in pipeline on valve and pipe bent position outer wall
Fiber grating acoustic emission sensor is filled, leakage is determined whether by the leakage sound wave of monitoring, with one on pipeline outer wall axial direction
Stress distribution of the fixed fiber Bragg grating strain sensor for being spaced installation circumferentially around arrangement to monitor pipeline outer wall during No leakage
With the strain of pipeline outer wall caused by suction wave when leaking, the position of stress distribution gradient mutation is exactly the area of crackle or corrosion
Domain；For the pipeline of embedment, in pipeline (side lower part of pipeline two) laying optical fiber grating temperature measuring optical cable, pass through the temperature of monitoring
Change determine whether leakage (for the pipeline of embedment, the medium of conveying and it is extraneous it is general all to have a uniform temperature poor,
When the dielectric leakage of conveying, the temperature field of the medium of tube circumference can change), laying optical fiber grating is prevented above pipeline
Optical cable is invaded, determines whether that (when there is invasion, the medium of pipeline can produce shape for invasion by the medium deformation of monitoring
Become).As shown in figure 1, access armored optical cable after all fiber-optic grating sensor wavelength-division multiplex, armored optical cable successively with terminal box,
Grating fibers (FBG) demodulator, data handling system and on-line monitoring system connection.In the present embodiment, fiber Bragg grating (FBG) demodulator is used
FBG-8M500, main performance index is：Demodulation speed --- demodulator exemplary operation speed 0HZ~500HZ, maximum functional speed
Degree is more than 500HZ；Demodulation accuracy --- systemic resolution reaches 1pm, and typical error is scholar 1pm, and worst error is less than ± 2pm；
Demodulation points --- it can simultaneously be demodulated with 8 roads, sweep limits is 50nm, more than 160 can be demodulated according to practical situations
Sensing grating.Data handling system sets up monitor database using Enterprise Data library software MS SQL Server2000, storage
Deposit the data collected and data management, inquiry, analysis are provided.The knot that on-line monitoring system is combined using advanced C/S and B/S
Structure, using 3D modeling and virtual reality technology, realizes the healthy shape such as leakage, invasion, crackle, burn into stress and strain of pipeline
The monitoring of state.
The present invention can monitor the temperature field of flow, pressure, leakage sound wave, stress and strain and the pipeline of pipeline
With the different kinds of parameters such as medium deformation, and the healthy shape such as leakage, invasion, crackle, burn into stress and strain of pipeline is judged accordingly
Stress at state, crackle or corrosion can reflect the order of severity of crackle or corrosion, and the stress at common position can reflect pipe
Road bears state, to investigate and overhaul there is provided reference frame；The present invention passes through flow, pressure, leakage sound wave, strain, temperature
Multiple parameters such as degree field determine whether leakage, and fully eliminating normal operating, (pipeline start and stop are defeated, start and stop pump, increase and decrease throughput rate, tune
Pressure etc.) produce influence, improve the degree of accuracy of judgement；The present invention is high using fiber-optic grating sensor measurement accuracy.
In the present embodiment, for the pipeline not being embedded to, by fiber bragg grating pressure sensor, fiber grating voice sending sensor
The parameter that device and fiber Bragg grating strain sensor are collected determines whether leakage using adaptive weighted Fusion Estimation Algorithm.From
Adapting to weighting fusion estimate algorithm should not seek knowledge any priori, it is only necessary to the measurement data provided by each sensor,
The optimal weighted factor corresponding to each sensor is found in an adaptive way, the information minimum so as to draw mean square error
Fusion value, eliminates the influence of accidentalia, further increases the degree of accuracy of judgement.
In the present embodiment, when the stress, strain that fiber Bragg grating strain sensor is monitored exceed safety margins, automatic hair
Play alarm.When stress, strain exceed safety margins, it is more likely that damage pipeline, alarm is automatically initiated, inspection can be investigated in time
Repair.
In the present embodiment, fiber grating acoustic emission sensor is arranged on pipeline outer wall by magnet, is removed before installing
In installation surface on loose coating and oxide skin, the greasy dirt in cleaning installation surface and unnecessary material, polishing installation surface
Coarse place, acoustic couplant is filled after installation in contact position.Installation surface cleaning, contact position are close, it is ensured that the good sound transmission.
In the present embodiment, optical fiber raster flow sensor two ends carry flange, and optical fiber raster flow sensor passes through method
Orchid is arranged on pipeline；Fiber bragg grating pressure sensor is threadably mounted on the spare interface of pipeline by sealing；Fiber grating
Strain transducer is pasted onto pipe surface by epoxy resin glue.
It should be appreciated that for those of ordinary skills, can according to the above description be improved or converted,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Claims (7)
1. a kind of optical fiber grating sensing pipeline health monitoring systems of many reference amounts, it is characterised in that：For multiple ginsengs to pipeline
Amount is monitored and health state evaluation is carried out to pipeline by the parameter of collection, including the fiber grating being distributed on pipeline is passed
Sensor and the terminal box being sequentially connected with fiber-optic grating sensor, grating fibers (FBG) demodulator, data handling system and online prison
Examining system；Optical fiber raster flow sensor is installed inside at the key node of pipeline main line and branch line, in pipeline close to valve
With installation fiber bragg grating pressure sensor inside pipe bent position, pass through point of the flow of monitoring and the situation of change of pressure and flow
Judge no there is leakage with situation；For the pipeline not being embedded to, fiber grating is installed on valve and pipe bent position outer wall in pipeline
Acoustic emission sensor, determines whether leakage by the leakage sound wave of monitoring, is installed at certain intervals on pipeline outer wall axial direction
It is negative when the stress distribution of pipeline outer wall and leakage during No leakage to monitor circumferentially around the fiber Bragg grating strain sensor of arrangement
The strain of pipeline outer wall caused by pressure ripple, the position of stress distribution gradient mutation is exactly the region of crackle or corrosion；For embedment
Pipeline, in pipeline laying optical fiber grating temperature measuring optical cable, leakage is determined whether by the change in the temperature field of monitoring,
Laying optical fiber grating anti-intrusion optical cable above pipeline, invasion is determined whether by the medium deformation of monitoring.
2. the optical fiber grating sensing pipeline health monitoring systems of many reference amounts as claimed in claim 1, it is characterised in that：For not
The pipeline of embedment, fiber bragg grating pressure sensor, fiber grating acoustic emission sensor and fiber Bragg grating strain sensor are collected
Parameter determined whether using adaptive weighted Fusion Estimation Algorithm leakage.
3. the optical fiber grating sensing pipeline health monitoring systems of many reference amounts as claimed in claim 1, it is characterised in that：Work as optical fiber
When the stress of grating strain transducer monitoring, strain exceed safety margins, alarm is automatically initiated.
4. the optical fiber grating sensing pipeline health monitoring systems of many reference amounts as claimed in claim 1, it is characterised in that：Optical fiber light
Grid acoustic emission sensor is arranged on pipeline outer wall by magnet, coating loose in removing installation surface and oxidation before installing
Coarse place on skin, the greasy dirt in cleaning installation surface and unnecessary material, polishing installation surface, in contact position filling sound after installation
Couplant.
5. the optical fiber grating sensing pipeline health monitoring systems of many reference amounts as claimed in claim 1, it is characterised in that：Optical fiber light
Grid current quantity sensor two ends carry flange, and optical fiber raster flow sensor is arranged on pipeline by flange.
6. the optical fiber grating sensing pipeline health monitoring systems of many reference amounts as claimed in claim 1, it is characterised in that：Optical fiber light
Grid voltage force snesor is threadably mounted on the spare interface of pipeline by sealing.
7. the optical fiber grating sensing pipeline health monitoring systems of many reference amounts as claimed in claim 1, it is characterised in that：Optical fiber light
Grid strain transducer is pasted onto pipe surface by epoxy resin glue.
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| CN201710136943.0A CN106958742A (en) | 2017-03-08 | 2017-03-08 | The optical fiber grating sensing pipeline health monitoring systems of many reference amounts |
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| CN201710136943.0A CN106958742A (en) | 2017-03-08 | 2017-03-08 | The optical fiber grating sensing pipeline health monitoring systems of many reference amounts |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108758353A (en) * | 2018-06-12 | 2018-11-06 | 青岛汇安谷科技发展有限公司 | Distribution type fiber-optic many reference amounts pipe leakage positioning alarm system and leakage locating method |
| CN109029578A (en) * | 2018-08-09 | 2018-12-18 | 北京建筑大学 | A kind of feedwater piping safe operation monitoring system and method |
| CN109087720A (en) * | 2018-09-12 | 2018-12-25 | 上海核工程研究设计院有限公司 | A kind of acousto-optic combination leakage monitoring system for nuclear power plant's main steam line |
| CN109210384A (en) * | 2018-09-13 | 2019-01-15 | 上海万朗水务科技有限公司 | Sewage treatment main pipe tube Net Information System |
| CN109374067A (en) * | 2018-12-11 | 2019-02-22 | 武汉理工大学 | Many reference amounts Fibre Optical Sensor highway plate-girder real-time monitoring system and monitoring method |
| CN109404734A (en) * | 2018-10-10 | 2019-03-01 | 大连智识科技发展有限公司 | Natural gas line leak detection systems based on fiber grating |
| CN109579725A (en) * | 2018-12-24 | 2019-04-05 | 南京东智安全科技有限公司 | A kind of long gauge length strain transducer of high-temperature flexible, manufacturing method and application |
| CN111765389A (en) * | 2020-06-22 | 2020-10-13 | 武汉理工大学 | Intelligent city management network state real-time monitoring method and system |
| CN111862560A (en) * | 2020-06-15 | 2020-10-30 | 广东博智林机器人有限公司 | Early warning device, glass fixing equipment, glass early warning system and glass early warning method |
| CN112082093A (en) * | 2020-08-31 | 2020-12-15 | 中国石油集团渤海钻探工程有限公司 | Oil gas high-pressure pipeline damage and leakage monitoring method |
| CN112833950A (en) * | 2021-01-07 | 2021-05-25 | 中国舰船研究设计中心 | Distributed measurement system for complex flow field in steam pipeline based on optical fiber sensing |
| CN112964301A (en) * | 2021-02-09 | 2021-06-15 | 广东电网有限责任公司 | Monitoring method, device, system, equipment and storage medium of power pipeline |
| CN113781749A (en) * | 2021-09-09 | 2021-12-10 | 太原理工大学 | Underground pipe gallery internal pipeline leakage positioning and early warning device, system and method |
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| CN108758353A (en) * | 2018-06-12 | 2018-11-06 | 青岛汇安谷科技发展有限公司 | Distribution type fiber-optic many reference amounts pipe leakage positioning alarm system and leakage locating method |
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| CN109087720A (en) * | 2018-09-12 | 2018-12-25 | 上海核工程研究设计院有限公司 | A kind of acousto-optic combination leakage monitoring system for nuclear power plant's main steam line |
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| CN109404734A (en) * | 2018-10-10 | 2019-03-01 | 大连智识科技发展有限公司 | Natural gas line leak detection systems based on fiber grating |
| CN109374067A (en) * | 2018-12-11 | 2019-02-22 | 武汉理工大学 | Many reference amounts Fibre Optical Sensor highway plate-girder real-time monitoring system and monitoring method |
| CN109579725A (en) * | 2018-12-24 | 2019-04-05 | 南京东智安全科技有限公司 | A kind of long gauge length strain transducer of high-temperature flexible, manufacturing method and application |
| CN111862560A (en) * | 2020-06-15 | 2020-10-30 | 广东博智林机器人有限公司 | Early warning device, glass fixing equipment, glass early warning system and glass early warning method |
| CN111862560B (en) * | 2020-06-15 | 2021-09-14 | 广东博智林机器人有限公司 | Early warning device, glass fixing equipment, glass early warning system and glass early warning method |
| CN111765389A (en) * | 2020-06-22 | 2020-10-13 | 武汉理工大学 | Intelligent city management network state real-time monitoring method and system |
| CN112082093A (en) * | 2020-08-31 | 2020-12-15 | 中国石油集团渤海钻探工程有限公司 | Oil gas high-pressure pipeline damage and leakage monitoring method |
| CN112833950A (en) * | 2021-01-07 | 2021-05-25 | 中国舰船研究设计中心 | Distributed measurement system for complex flow field in steam pipeline based on optical fiber sensing |
| CN112964301A (en) * | 2021-02-09 | 2021-06-15 | 广东电网有限责任公司 | Monitoring method, device, system, equipment and storage medium of power pipeline |
| CN113781749A (en) * | 2021-09-09 | 2021-12-10 | 太原理工大学 | Underground pipe gallery internal pipeline leakage positioning and early warning device, system and method |
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