CN108150836A - Monitoring leak from oil gas pipe early warning system based on optical fiber - Google Patents
Monitoring leak from oil gas pipe early warning system based on optical fiber Download PDFInfo
- Publication number
- CN108150836A CN108150836A CN201611094035.1A CN201611094035A CN108150836A CN 108150836 A CN108150836 A CN 108150836A CN 201611094035 A CN201611094035 A CN 201611094035A CN 108150836 A CN108150836 A CN 108150836A
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- Prior art keywords
- optical fiber
- early warning
- module
- gas pipe
- monitoring
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Classifications
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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
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
Abstract
The present invention relates to a kind of monitoring leak from oil gas pipe early warning systems based on optical fiber, and the optical fiber sensing system forms distributed vibration sensor using single mode optical fiber, the excavation vibration signal near oil-gas pipeline to be extracted；Risk data and warning message are transferred to early warning monitoring terminal by the warning data acquisition system to the vibration signal on timely collection ground；The early warning monitoring terminal alarms to threat signal by various type of alarms to receive the warning message of warning data acquisition system, and dangerous information is informed administrator by display positioning.Distribution type fiber-optic early warning system of the present invention is realized using distributed fiberoptic sensor to the real time monitoring along pipeline and early warning, system alarm signal transmission is realized to the time difference of signal acquisition by the interference of vibration signal to realize the positioning of system, classification processing is carried out to the signal of different harmful grades, rate of false alarm is low.
Description
Technical field
Patent of the present invention belongs to Monitoring Pinpelines field, especially a kind of monitoring leak from oil gas pipe early warning system based on optical fiber
System.
Background technology
Oil and gas pipeline is developed rapidly with the development of national economy and the needs of national economy.12 planning will
The scale of oil-gas pipeline further expands.The freight volume of petroleum gas is also increasing year by year, and pipeline also extends into every country,
There is far-reaching influence to world oil industry.But since the distance of long oil and gas pipeline transport is very long, and it is long-term it is buried in
The features such as underground.With the increase of pipeline active time, pipeline can be by burn into natural calamity and the artificial destructions such as oil stolen steathily
Influence, frequently result in pipeline oil and gas leakage accident caused by rupture, leakage accident not only causes stopping for pipeline once occurring
It is defeated, huge economic loss is brought, is ruptured if there is submarine pipeline, it is more likely that just directly result in scrapping for pipeline, simultaneously
Pipe leakage can also cause environmental disruption；When pipeline transportation noxious material leaks, it is also possible to the life to neighbouring resident
Composition of estate is ordered to threaten.
Oil gas safety corridor leakage monitoring system increasingly attracts attention, and reliable line leakage system can in real time
The guarantee of pipeline transportation for petroleum chemical enterprise is provided, in the operation troubles of pipeline, how to find hazard event in time and right
It carries out accurately alarm positioning, reduces or prevents the probability occurred, ensures that property safety and people's life, environmental protection are exempted from
In pollution, ensure the normal work of oil pipeline, everything all proposes line leakage technology urgent requirement with choosing
War；Traditional leakage method is all post-event alarm, not to conduit running although having greatly improved in the performance of monitoring
It plays a very good protection.Therefore, early warning in advance is carried out to pipe safety to be had there is an urgent need to and has realistic meaning.
Invention content
A kind of overcome the deficiencies in the prior art of the present invention, it is proposed that monitoring leak from oil gas pipe early warning system based on optical fiber
System, once there are abnormal conditions, system carries out alarm positioning to it at the first time, is carried out by the signal to different harmful grades
Classification is handled, and improves the reliability of system.
The present invention solves its technical problem and following technical scheme is taken to realize：
It is made of optical fiber sensing system, warning data acquisition system, monitor terminal；The optical fiber sensing system uses single-mode optics
Fibre forms distributed vibration sensor, the excavation vibration signal near oil-gas pipeline to be extracted；The early warning number
According to acquisition system to the vibration signal on timely collection ground, risk data and warning message are transferred to early warning monitoring
Terminal；The early warning monitoring terminal passes through various type of alarms pair to receive the warning message of warning data acquisition system
Threat signal is alarmed, and dangerous information is informed administrator by display positioning.
Moreover, the optical fiber sensing system includes front end fiber termination box, distal optical fiber box, optical cable, Polarization Controller, optical fiber
Sensor.
Moreover, the warning data acquisition system, which includes data processing module, data acquisition module, PIN pipes, receives tune
Manage circuit, PIN pipes, laser driving circuit, laser, computer processing module.
Moreover, the PIN pipes receiving conditioning circuit includes photoelectric converter, wave filter, post amplifier, overvoltage protection
Module, A/D converter, state monitoring module；The photoelectric converter is connect respectively with wave filter, state monitoring module；Institute
The wave filter stated is connect with post amplifier；The post amplifier is connect with overvoltage protective module；The overvoltage protection
Module is connect with A/D converter.
Moreover, the laser driving circuit includes power module, delayed startup module, temperature control modules, overcurrent
Protection module, automatic power control module, constant current source module.
Moreover, the power module, delayed startup module, overcurrent protection module, constant current source module respectively with laser
It is connected；The laser is connected respectively with temperature control modules, automatic power control module；The automated power control mould
Block is connected with constant current source module.
Moreover, the data processing module is realized using industrial personal computer.
Moreover, the laser uses Distributed Feedback Laser, temperature controlled release TEC modules are carried.
Advantage of the present invention and good effect are：
1st, distribution type fiber-optic early warning system of the present invention using distributed fiberoptic sensor realize to the real time monitoring along pipeline with
Early warning realizes system alarm signal transmission to the time difference of signal acquisition to realize determining for system by the interference of vibration signal
Position, carries out classification processing, rate of false alarm is low to the signal of different harmful grades.
Description of the drawings
Fig. 1 is the structure connection figure of the present invention；
Fig. 2 is PIN pipe receiving conditioning circuit connection figures；
Fig. 3 is laser driving circuit connection figure.
Specific embodiment
The specific embodiment of the invention is further described with reference to attached drawing：
As shown in Figure 1, a kind of monitoring leak from oil gas pipe early warning system based on optical fiber of the present invention, by Fibre Optical Sensor system
System, warning data acquisition system, monitor terminal composition；The optical fiber sensing system forms distributed vibration using single mode optical fiber
Sensor, the excavation vibration signal near oil-gas pipeline to be extracted；The warning data acquisition system is to reality
When acquisition process ground on vibration signal, risk data and warning message are transferred to early warning monitoring terminal；The early warning
Monitor terminal reports threat signal by various type of alarms to receive the warning message of warning data acquisition system
Alert, dangerous information is informed administrator by display positioning.
Optical fiber sensing system, along one optical cable of pipeline parallel laid, forms distribution using single mode optical fiber and shakes in Near Pipelines
Dynamic sensor, the excavation vibration signal of Near Pipelines is extracted, and two optical fiber in optical cable in different conduits form system
The two of which pickup arm of middle fibre optical sensor obtains vibration signal on the way, and Article 3 optical fiber is used for signal transmission, by two-way hair
The laser transmission tieback penetrated receives PIN pipes, tests the interference signal that light wave is formed after converging in optical fiber for two and is transferred to warning data
Acquisition processing system carries out subsequent processing.
Warning data acquisition processing system is installed on pipeline valve chamber, acquires in real time and handles the vibration signal on ground, will
Risk data is transferred to early warning monitoring terminal with warning message, and warning data acquisition processing system passes through the optical signal in optical cable
Photoelectric converter is converted into electric signal, and electric signal is amplified by wave filter, post amplifier, filtered, at computer
It manages module and ground vibration signal is subjected to threshold discrimination and location Calculation, be finally delivered to early warning monitoring terminal, shown.
Early warning monitoring terminal is installed on central control room, receives the warning message of warning data acquisition processing system, passes through
Various type of alarms alarm to threat signal, and dangerous information is informed administrator in time, makes it most in short-term by display positioning
It is interior to avoid dangerous generation.
System uses the optical cable of buried laying, a fiber termination box is respectively installed in the head end of signal transmission and end, to connect
Interference signal is received, light source is entered in fiber termination box, warning data acquisition system acquisition land by emitting the laser of fixed wave length
On vibration signal, once there is abnormal conditions, the interference signal of vibration is transferred to warning data by head end fiber termination box and adopts
Collecting system carries out opto-electronic conversion and pretreatment, and computer processing module is entered after A/D converter translative mode and carries out software filter
Handling result is transferred to early warning monitoring terminal and is shown by wave, threshold discrimination and located in connection.
System judges the degree of danger of signal according to the collected signal of fibre optical sensor, and signal is divided into 3 classes：
（1）Harmful grade 1：Do not have threat signal；Pipeline has many vibration signals for not having threat on the way, all can be by Fibre Optical Sensor
Device captures, and using the Digital Signal Processing method of pattern-recognition, the Modulation recognition that these are not had threat comes out, according to database
It is identified, once being identified as not having threat signal, system automatically shields it, not alarms.
（2）Harmful grade 2：There may be threat signal；It is had unavoidably in conduit running across construction, cultivation area.
The operation of various constructions or farming may constitute a threat to the normal operation of pipeline, it is compared according to database, right
Classification alarm and positioning is identified in this unintentional destruction.
（3）Harmful grade 3：With threat signal；The mode of various drilling hole of oil stolen, which can all be formed ground, to be vibrated, at this time
Vibration signal can realize alarm positioning function by the comparison with database.
The present invention has the characteristics that high sensitivity, registration, detection time are short, rate of false alarm is low, can be well adapted for each
Kind working environment.
It is emphasized that embodiment of the present invention is illustrative rather than limited, therefore the present invention is simultaneously
The embodiment described in specific embodiment is not limited to, it is every to be obtained according to the technique and scheme of the present invention by those skilled in the art
Other embodiment, also belong to the scope of protection of the invention.
Claims (8)
1. a kind of monitoring leak from oil gas pipe early warning system based on optical fiber, by optical fiber sensing system, warning data acquisition system,
Monitor terminal forms；The optical fiber sensing system forms distributed vibration sensor using single mode optical fiber, to by Oil/Gas Pipe
Excavation vibration signal near road extracts；The warning data acquisition system is to shaking on timely collection ground
Risk data and warning message are transferred to early warning monitoring terminal by dynamic signal；The early warning monitoring terminal is receiving early warning
The warning message of data collecting system alarms to threat signal by various type of alarms, display positioning, by dangerous information
Inform administrator.
2. the monitoring leak from oil gas pipe early warning system according to claim 1 based on optical fiber, it is characterised in that：Described
Optical fiber sensing system includes front end fiber termination box, distal optical fiber box, optical cable, Polarization Controller.
3. the monitoring leak from oil gas pipe early warning system according to claim 1 based on optical fiber, it is characterised in that：Described
Warning data acquisition system includes data processing module, data acquisition module, PIN pipes receiving conditioning circuit, PIN pipes, laser
Driving circuit, laser, computer processing module.
4. the monitoring leak from oil gas pipe early warning system according to claim 3 based on optical fiber, it is characterised in that：Described
PIN pipes receiving conditioning circuit includes photoelectric converter, wave filter, post amplifier, overvoltage protective module, A/D converter, state
Monitoring modular；The photoelectric converter is connect respectively with wave filter, state monitoring module；The wave filter amplifies with postposition
Device connects；The post amplifier is connect with overvoltage protective module；The overvoltage protective module is connect with A/D converter.
5. the monitoring leak from oil gas pipe early warning system according to claim 3 based on optical fiber, it is characterised in that：Described
Laser driving circuit includes power module, delayed startup module, temperature control modules, overcurrent protection module, automated power control
Molding block, constant current source module.
6. the monitoring leak from oil gas pipe early warning system based on optical fiber according to claim 3 and 5, it is characterised in that：Institute
Power module, delayed startup module, overcurrent protection module, the constant current source module stated are connected respectively with laser；The laser
Device is connected respectively with temperature control modules, automatic power control module；The automatic power control module and constant current source module
It is connected.
7. the monitoring leak from oil gas pipe early warning system according to claim 3 based on optical fiber, it is characterised in that：Described
Data processing module is realized using industrial personal computer.
8. the monitoring leak from oil gas pipe early warning system according to claim 3 based on optical fiber, it is characterised in that：Described
Laser uses Distributed Feedback Laser, carries temperature controlled release TEC modules.
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| CN201611094035.1A CN108150836A (en) | 2016-12-02 | 2016-12-02 | Monitoring leak from oil gas pipe early warning system based on optical fiber |
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| CN201611094035.1A CN108150836A (en) | 2016-12-02 | 2016-12-02 | Monitoring leak from oil gas pipe early warning system based on optical fiber |
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| CN201611094035.1A Pending CN108150836A (en) | 2016-12-02 | 2016-12-02 | Monitoring leak from oil gas pipe early warning system based on optical fiber |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591839A (en) * | 2018-06-15 | 2018-09-28 | 钦州学院 | A kind of skyscraper natural gas standpipe security protection early warning system and method for early warning |
| CN109579972A (en) * | 2018-12-19 | 2019-04-05 | 深圳供电规划设计院有限公司 | A kind of pipeline vibration early warning positioning device and method |
| CN110131486A (en) * | 2019-04-17 | 2019-08-16 | 北京百世通管道科技有限公司 | Optical fiber compound pipeline complex pipeline and its monitoring system and method for early warning |
| CN110886968A (en) * | 2019-11-26 | 2020-03-17 | 北部湾大学 | Natural gas riser early warning system based on optical fiber sensing |
| CN111058827A (en) * | 2019-10-30 | 2020-04-24 | 武汉光谷航天三江激光产业技术研究院有限公司 | Underground cross flow simulation monitoring system |
| CN111063174A (en) * | 2018-10-17 | 2020-04-24 | 海隆石油集团(上海)信息技术有限公司 | Pipeline line safety early warning system based on distributed optical fiber sensing |
| CN113970072A (en) * | 2021-12-21 | 2022-01-25 | 北京和图海纳科技有限公司 | Monitoring method and monitoring system based on data processing |
| CN114234055A (en) * | 2021-12-28 | 2022-03-25 | 国家石油天然气管网集团有限公司 | Oil and gas pipeline optical fiber vibration alarm signal rechecking method and system |
| WO2024055345A1 (en) * | 2022-09-13 | 2024-03-21 | 武汉理工光科股份有限公司 | Distributed optical-fiber-based motion state analysis method, system and device for excitation source |
Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866651A (en) * | 2006-05-30 | 2006-11-22 | 南开大学 | Intelligent high-power semiconductor laser drive apparatus |
| CN101183899A (en) * | 2007-12-19 | 2008-05-21 | 天津大学 | BP network based pipeline security identifying method for optical fiber pipeline leakage monitoring device |
| CN201113984Y (en) * | 2007-09-30 | 2008-09-10 | 朱恩灿 | Short wave reception optical fiber transmission system |
| CN101344440A (en) * | 2008-08-28 | 2009-01-14 | 上海华魏自动化设备有限公司 | Automatic temperature calibration type distributed optical fiber temperature measurement sensing equipment and its use method |
| CN101603856A (en) * | 2009-07-16 | 2009-12-16 | 上海华魏光纤传感技术有限公司 | A kind of long-distance distributed optical fiber vibration sensing system and method |
| CN101684891A (en) * | 2008-09-27 | 2010-03-31 | 中国石油天然气股份有限公司 | Stress wave and optical fiber sensing compound pipeline safety pre-warning system |
| CN101777824A (en) * | 2010-03-05 | 2010-07-14 | 厦门大学 | Anti-surge circuit of semiconductor laser power supply |
| CN102445581A (en) * | 2011-11-17 | 2012-05-09 | 哈尔滨工业大学 | Capacitive voltage-division type self-calibration optical voltage transducer |
| CN102680131A (en) * | 2011-03-07 | 2012-09-19 | 昆山蓝岭科技有限公司 | Distributed fiber grating temperature measurement sensing device |
| CN103033205A (en) * | 2012-12-14 | 2013-04-10 | 张丽 | Fiber bragg grating interrogator based on digitization tunable light sources and method thereof |
| CN103368051A (en) * | 2013-07-12 | 2013-10-23 | 北京信息科技大学 | Semiconductor laser driving system used for fiber laser pump |
| CN203940239U (en) * | 2013-10-29 | 2014-11-12 | 中国石油天然气股份有限公司 | Pipeline optical fiber safety monitor and early warning system |
| CN204008450U (en) * | 2014-07-25 | 2014-12-10 | 国家电网公司 | Methane gas Fibre Optical Sensor monitoring system |
| CN104748771A (en) * | 2015-04-17 | 2015-07-01 | 安徽师范大学 | Single-core fiber communicating and sensing device |
| CN204479965U (en) * | 2015-01-22 | 2015-07-15 | 北京奥普维尔科技有限公司 | A kind of power invariability system of laser instrument |
| CN105371943A (en) * | 2015-12-29 | 2016-03-02 | 成都瑞莱杰森科技有限公司 | Demodulating method and device for distributed optical fiber vibration sensing system |
| CN205698926U (en) * | 2016-04-22 | 2016-11-23 | 北京龙慧珩医疗科技发展有限公司 | A kind of semiconductor laser therapeutic drives protection device |
-
2016
- 2016-12-02 CN CN201611094035.1A patent/CN108150836A/en active Pending
Patent Citations (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1866651A (en) * | 2006-05-30 | 2006-11-22 | 南开大学 | Intelligent high-power semiconductor laser drive apparatus |
| CN201113984Y (en) * | 2007-09-30 | 2008-09-10 | 朱恩灿 | Short wave reception optical fiber transmission system |
| CN101183899A (en) * | 2007-12-19 | 2008-05-21 | 天津大学 | BP network based pipeline security identifying method for optical fiber pipeline leakage monitoring device |
| CN101344440A (en) * | 2008-08-28 | 2009-01-14 | 上海华魏自动化设备有限公司 | Automatic temperature calibration type distributed optical fiber temperature measurement sensing equipment and its use method |
| CN101684891A (en) * | 2008-09-27 | 2010-03-31 | 中国石油天然气股份有限公司 | Stress wave and optical fiber sensing compound pipeline safety pre-warning system |
| CN101603856A (en) * | 2009-07-16 | 2009-12-16 | 上海华魏光纤传感技术有限公司 | A kind of long-distance distributed optical fiber vibration sensing system and method |
| CN101777824A (en) * | 2010-03-05 | 2010-07-14 | 厦门大学 | Anti-surge circuit of semiconductor laser power supply |
| CN102680131A (en) * | 2011-03-07 | 2012-09-19 | 昆山蓝岭科技有限公司 | Distributed fiber grating temperature measurement sensing device |
| CN102445581A (en) * | 2011-11-17 | 2012-05-09 | 哈尔滨工业大学 | Capacitive voltage-division type self-calibration optical voltage transducer |
| CN103033205A (en) * | 2012-12-14 | 2013-04-10 | 张丽 | Fiber bragg grating interrogator based on digitization tunable light sources and method thereof |
| CN103368051A (en) * | 2013-07-12 | 2013-10-23 | 北京信息科技大学 | Semiconductor laser driving system used for fiber laser pump |
| CN203940239U (en) * | 2013-10-29 | 2014-11-12 | 中国石油天然气股份有限公司 | Pipeline optical fiber safety monitor and early warning system |
| CN204008450U (en) * | 2014-07-25 | 2014-12-10 | 国家电网公司 | Methane gas Fibre Optical Sensor monitoring system |
| CN204479965U (en) * | 2015-01-22 | 2015-07-15 | 北京奥普维尔科技有限公司 | A kind of power invariability system of laser instrument |
| CN104748771A (en) * | 2015-04-17 | 2015-07-01 | 安徽师范大学 | Single-core fiber communicating and sensing device |
| CN105371943A (en) * | 2015-12-29 | 2016-03-02 | 成都瑞莱杰森科技有限公司 | Demodulating method and device for distributed optical fiber vibration sensing system |
| CN205698926U (en) * | 2016-04-22 | 2016-11-23 | 北京龙慧珩医疗科技发展有限公司 | A kind of semiconductor laser therapeutic drives protection device |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108591839A (en) * | 2018-06-15 | 2018-09-28 | 钦州学院 | A kind of skyscraper natural gas standpipe security protection early warning system and method for early warning |
| CN111063174A (en) * | 2018-10-17 | 2020-04-24 | 海隆石油集团(上海)信息技术有限公司 | Pipeline line safety early warning system based on distributed optical fiber sensing |
| CN109579972A (en) * | 2018-12-19 | 2019-04-05 | 深圳供电规划设计院有限公司 | A kind of pipeline vibration early warning positioning device and method |
| CN110131486A (en) * | 2019-04-17 | 2019-08-16 | 北京百世通管道科技有限公司 | Optical fiber compound pipeline complex pipeline and its monitoring system and method for early warning |
| CN111058827A (en) * | 2019-10-30 | 2020-04-24 | 武汉光谷航天三江激光产业技术研究院有限公司 | Underground cross flow simulation monitoring system |
| CN110886968A (en) * | 2019-11-26 | 2020-03-17 | 北部湾大学 | Natural gas riser early warning system based on optical fiber sensing |
| CN110886968B (en) * | 2019-11-26 | 2021-12-07 | 北部湾大学 | Natural gas riser early warning system based on optical fiber sensing |
| CN113970072A (en) * | 2021-12-21 | 2022-01-25 | 北京和图海纳科技有限公司 | Monitoring method and monitoring system based on data processing |
| CN114234055A (en) * | 2021-12-28 | 2022-03-25 | 国家石油天然气管网集团有限公司 | Oil and gas pipeline optical fiber vibration alarm signal rechecking method and system |
| CN114234055B (en) * | 2021-12-28 | 2024-04-23 | 国家石油天然气管网集团有限公司 | Method and system for rechecking optical fiber vibration alarm signal of oil and gas pipeline |
| WO2024055345A1 (en) * | 2022-09-13 | 2024-03-21 | 武汉理工光科股份有限公司 | Distributed optical-fiber-based motion state analysis method, system and device for excitation source |
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