CN202598147U - Natural gas pipeline leakage monitoring system based on sensing optical fiber - Google Patents
Natural gas pipeline leakage monitoring system based on sensing optical fiber Download PDFInfo
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- CN202598147U CN202598147U CN 201220198375 CN201220198375U CN202598147U CN 202598147 U CN202598147 U CN 202598147U CN 201220198375 CN201220198375 CN 201220198375 CN 201220198375 U CN201220198375 U CN 201220198375U CN 202598147 U CN202598147 U CN 202598147U
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 239000003345 natural gas Substances 0.000 title claims abstract description 29
- 239000013307 optical fiber Substances 0.000 title claims abstract description 26
- 238000012544 monitoring process Methods 0.000 title claims abstract description 17
- 230000003287 optical effect Effects 0.000 claims abstract description 41
- 238000004891 communication Methods 0.000 claims abstract description 8
- 238000005259 measurement Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 22
- 239000000835 fiber Substances 0.000 claims description 18
- 238000002955 isolation Methods 0.000 claims description 7
- 238000005086 pumping Methods 0.000 claims description 6
- 230000035945 sensitivity Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 239000011435 rock Substances 0.000 description 4
- 238000001069 Raman spectroscopy Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
The utility model relates to a natural gas line leakage monitoring system based on sensing optical fiber relates to mechanical vibration's measurement, the measurement of impact, the system and the pipe-line system technical field of optics. The system consists of a monitoring center (1), a system host (2) and a communication optical fiber (4) laid in the same ditch with a pipeline (6); each pump station or valve chamber (5) is provided with a system host (2), the system hosts (2) of two adjacent pump stations or valve chambers are connected after being connected with an optical path coupler (3) through a communication optical cable, and the system hosts (2) are all connected with a monitoring center (1). The utility model discloses real-time supervision practices thrift the manpower, and the good reliability is intrinsic explosion-proof, does not receive electromagnetic interference, and sensitivity is high, and it is nimble convenient to use, long service life, safe and reliable.
Description
Technical field
The utility model is a kind of natural gas line leakage system based on sensor fibre, relates to the measurement of mechanical vibration, the measurement of impact, the system and the pipe-line system technical field of optics.
Background technique
The long distance gas pipeline bore is big, pressure is high, and rock gas has inflammable and explosive characteristics, in case leakage accident takes place, secondary disasters such as very easily explosion caused, fire, harmfulness is very big.When particularly (like artery traffic, railway terminal, developed area etc.) take place to leak in the key area; Consequence is even more serious; Bring grave danger for people life property safety and physical environment, also will have influence on the social stability and the national economic development when serious.
At present, pipeline operator mainly relies on the manual inspection method to detect the leakage situation of natural gas line, and its capital equipment is portable combustible gas detector, and this method needs a large amount of manpowers, and can't monitor the leak condition of natural gas line in real time.
CN200920247730.6 and CN200820080639.5 have proposed based on infrasonic leakage monitoring method, and when pipeline took place to leak, leakage point can produce infrasonic wave, monitor the leak condition of pipeline through the sonic sensor of pipeline upstream and downstream installation.Because of rock gas has compressibility, it is very big to decay when infrasonic wave is propagated in rock gas, and the practical application effect of this method is not good.
CN200910055334.8 has proposed the natural gas line leakage method based on Airborne IR laser remote sensing detecting technology; This method needs by helicopter platform; User cost is very high; And can't realize real-time monitoring, receive condition restriction such as weather, wind direction, landform during use, so practical application example seldom.
Long distance gas pipeline is when construction, and laying in one ditch has communication optical cable, and redundant fibre core is generally all arranged.In addition, because of the long distance gas pipeline operating pressure is high, when pipeline takes place to leak; Leaking rock gas can sharply expand; Cause the leakage point temperature to descend rapidly, so the present invention will utilize optical fiber as temperature transducer, and judge whether to leak through the temperature field around the monitoring pipeline and taken place.
The model utility content
The purpose of the utility model is a kind of real-time monitoring of design, practice thrift manpower, good reliability, intrinsic are explosion-proof, do not receive electromagnetic interference, highly sensitive, flexible and convenient to use, long service life, safe and reliable natural gas line leakage system and monitoring method based on sensor fibre.
The utility model technical problem to be solved is: a kind of natural gas line leakage system based on sensor fibre is provided.This system adopts the telecommunication optical fiber of natural gas line laying in one ditch as temperature transducer and signal transmission passage.Fibre Optical Sensor is surveyed with signal transmission and is relied on optical signal and need not and supplies power, thereby this system has the intrinsic explosion-resistance characteristic, does not receive electromagnetic interference, is a kind of safe natural gas line leakage system.In addition, sensor fibre is a kind of distributed sensor, can monitor near the temperature field of optical fiber in real time, and have locating function.
The technological scheme of the utility model is:
Natural gas line leakage system based on sensor fibre is as shown in Figure 2, forms by Surveillance center 1, system host 2 with the telecommunication optical fiber 4 of pipeline 6 layings in one ditch.At each pumping plant or valve chamber 5 system host 2 is arranged, the system host 2 of adjacent two pumping plants or valve chamber connects a light path coupler 3 backs by communication optical cable and connects, and a plurality of system hosts 2 all meet Surveillance center 1.
Said system host is as shown in Figure 1, comprises lasing light emitter, light path coupler, light splitter, optical filter, receiving machine, data acquisition process unit, isochronous controller and computer.The laser that lasing light emitter sends connects optical cable through light path coupler one tunnel, and another road connects light splitter, optical filter, receiving machine, data acquisition process unit successively, and the data acquisition process unit has input output to be connected with computer; Lasing light emitter connects isochronous controller simultaneously, and isochronous controller has input output to be connected with computer.
The laser that lasing light emitter sends is transferred near the optical fiber of pipeline after being coupled through light path coupler, and laser is returned through the optical fiber back reflection, arrives photoreceiver through light splitter and wave filter, and optical signal is transferred to computer through the data acquisition process unit.When natural feed channel took place to leak, near the temperature the leakage point can descend rapidly.The temperature effect of Raman scattering dorsad when transmitting in optical fiber according to laser pulse, the temperature that can obtain optical fiber each point along the line is promptly accomplished the distributed measurement of temperature, thereby realizes that the leakage monitoring of natural gas line and leakage point locate.
The electric principle of system host is as shown in Figure 4.Lasing light emitter FC joint connects the FC joint of light path coupler; The I/OFC joint of light path coupler connects the FC joint of a plurality of optical fiber respectively; Another FC joint of light path coupler connects the FC joint of light splitter, and another FC joint of light splitter connects the FC joint of optical filter, and another FC joint of optical filter connects the FC joint of optical isolation amplifier; The VHDCI interface of optical isolation amplifier connects the VHDCI interface of capture card; The pci interface of capture card connects the pci interface of computer, and the VGA interface of computer connects the VGA interface of display device, the RS232 interface device taking alarm of computer.
The effect of the utility model
The natural gas line leakage system that the utility model adopts based on sensor fibre; Compare with the conventional artificial method of patrolling and examining; Has tangible advantage: can accomplish real-time monitoring, practice thrift manpower, good reliability; Simultaneously, this system's intrinsic is explosion-proof, do not receive electromagnetic interference, highly sensitive, reaction velocity fast, accurate positioning, flexible and convenient to use, long service life, safe and reliable, can show leakage informations such as gas pipeline leakage position and leak time in real time.In addition, but system also distribute near the temperature field the real time record natural gas line, can show with curve and digital dual mode, but the Monitoring Data longer-term storage, convenient inquiry; Natural gas line leakage system based on sensor fibre can realize distributed monitoring simultaneously, convenient long Distance Transmission and the centralized management that realizes signal.
Description of drawings
Fig. 1 is based on the natural gas line leakage system host theory diagram of sensor fibre
Fig. 2 is based on the natural gas line leakage system layout schematic representation of sensor fibre
Fig. 3 is based on the natural gas line leakage system monitoring flow chart of sensor fibre
Fig. 4 is based on the natural gas line leakage system electrical schematic diagram of sensor fibre
The 2-of 1-Surveillance center system host wherein
3-light path coupler 4-communication optical cable
5-valve chamber 6-pipeline
Embodiment
Embodiment. the principle based on the natural gas line leakage system of sensor fibre is as shown in Figure 2.Form by Surveillance center 1, system host 2 with the telecommunication optical fiber 4 of pipeline 6 layings in one ditch.At each pumping plant or valve chamber 5 system host 2 is arranged, the system host 2 of adjacent two pumping plants or valve chamber connects a light path coupler 3 backs by communication optical cable and connects, and a plurality of system hosts 2 all meet Surveillance center 1.
Native system adopts the telecommunication optical fiber with the pipeline laying in one ditch, and the lasing light emitter emitted laser is through getting into communication optical cable 4 behind the light path coupler, and the optical signal that reflects in the optical fiber passes through light path coupler; Arrive light splitter, behind light splitter and optical filter, isolated amplifier converts optical signal into electrical signal; And amplify; Reach computer by data collecting card then, the software systems on the computer are carried out analysing and processing to data, and warning message is sent to alarm.
Said system host is as shown in Figure 1, comprises lasing light emitter, light path coupler, light splitter, optical filter, receiving machine, data acquisition process unit, isochronous controller and computer.The laser that lasing light emitter sends connects optical cable through light path coupler one tunnel, and another road connects light splitter, optical filter, receiving machine, data acquisition process unit successively, and the data acquisition process unit has input output to be connected with computer; Lasing light emitter connects isochronous controller simultaneously, and isochronous controller has input output to be connected with computer.
Effective monitoring distance of each passage of main frame is 60 kilometers, when natural feed channel length during greater than 60 kilometers, needs the configuration multiple host, and its configuration schematic diagram is as shown in Figure 2.The main frame maximum of first terminal can be monitored 60 kilometers natural gas lines, and middle main frame can adopt the Twin channel configuration, and the monitoring distance of every main frame can reach 120 kilometers.
The circuit connection diagram of system is as shown in Figure 4.Lasing light emitter FC joint connects the FC joint of light path coupler; The I/OFC joint of light path coupler connects the FC joint of a plurality of optical fiber respectively; Another FC joint of light path coupler connects the FC joint of light splitter, and another FC joint of light splitter connects the FC joint of optical filter, and another FC joint of optical filter connects the FC joint of optical isolation amplifier; The VHDCI interface of optical isolation amplifier connects the VHDCI interface of capture card; The pci interface of capture card connects the pci interface of computer, and the VGA interface of computer connects the VGA interface of display device, the RS232 interface device taking alarm of computer.
The model of each components and parts is following in the circuit connection diagram:
Light path coupler: M3023993db;
Lasing light emitter: EXFO FLS-300;
Light splitter: OSF GC-1001;
Optical filter: LW-2686;
Optical isolation amplifier: HCPL-7800A;
Capture card: NI PCI6122.
As shown in Figure 3, native system comprises the steps: the leakage monitoring process of natural gas line
A. to the actual conditions of natural gas line, carry out system layout, the optical cable of natural gas line laying in one ditch is linked to each other with system host according to Fig. 2;
B. system host powers on, and reading is correlated with is provided with parameter (like the system alarm parameter, systematic sampling parameter etc. answer manual work that these parameters are set when system moves for the first time), and carries out initialization operation;
C. during system's proper functioning; The laser emitted light beams is through optical fiber transducer and be back to light path coupler; Temperature field around the optical fiber transducer can cause light beam in optical fiber, to produce Raman scattering, and the Raman scattering meeting produces stokes light and anti-Stokes light, behind light splitter and optical filter; Receiving machine converts optical signal into digital signal, supplies the collection of data acquisition process unit to use.The intensity of anti-Stokes light is lower than the Stokes light intensity, but very strong with the coherence of temperature, the Stokes light intensity then with the coherence of temperature a little less than.Through calculating the strength ratio of anti-Stokes light and stokes light, can measure optical fiber temperature field Ta on every side.
D. get into the next sampling period, measure optical fiber temperature field Tb on every side, and Ta and Tb are compared; Surpass alarm threshold value T if temperature descends, system host can carry out the leak position location Calculation, sends acoustooptic alarm simultaneously; And display alarm position and temperature, record Alert data and time;
E. the Ta value is made as Tb;
F. be back to the temperature data acquisition step, circulation is monitored;
G. when system's power down, observation process finishes.
This example is through test; Real-time monitoring be can accomplish, manpower, good reliability practiced thrift; Simultaneously; This system's intrinsic is explosion-proof, do not receive electromagnetic interference, highly sensitive, reaction velocity fast, accurate positioning, flexible and convenient to use, long service life, safe and reliable, can show leakage informations such as gas pipeline leakage position and leak time in real time.
Claims (3)
1. natural gas line leakage system based on sensor fibre is characterized in that it forms by Surveillance center (1), system host (2) with the telecommunication optical fiber (4) of pipeline (6) laying in one ditch; At each pumping plant or valve chamber (5) system host (2) is arranged, the system host (2) of adjacent two pumping plants or valve chamber connects a light path coupler (3) back by communication optical cable and connects, and a plurality of system hosts (2) all meet Surveillance center (1).
2. a kind of natural gas line leakage system based on sensor fibre according to claim 1 is characterized in that said system host comprises lasing light emitter, light path coupler, light splitter, optical filter, receiving machine, data acquisition process unit, isochronous controller and computer; The laser that lasing light emitter sends connects optical cable through light path coupler one tunnel, and another road connects light splitter, optical filter, receiving machine, data acquisition process unit successively, and the data acquisition process unit has input output to be connected with computer; Lasing light emitter connects isochronous controller simultaneously, and isochronous controller has input output to be connected with computer; The laser that lasing light emitter sends is transferred near the optical fiber of pipeline after being coupled through light path coupler, and laser is returned through the optical fiber back reflection, arrives photoreceiver through light splitter and wave filter, and optical signal is transferred to computer through the data acquisition process unit; When natural feed channel took place to leak, near the temperature the leakage point can descend rapidly; The temperature of obtaining optical fiber each point along the line is promptly accomplished the distributed measurement of temperature, thereby realizes the leakage monitoring and the leakage point location of natural gas line.
3. a kind of natural gas line leakage system according to claim 1 based on sensor fibre; The electric principle that it is characterized in that said system host is: lasing light emitter FC joint connects the FC joint of light path coupler; The I/OFC joint of light path coupler connects the FC joint of a plurality of optical fiber respectively; Another FC joint of light path coupler connects the FC joint of light splitter, and another FC joint of light splitter connects the FC joint of optical filter, and another FC joint of optical filter connects the FC joint of optical isolation amplifier; The VHDCI interface of optical isolation amplifier connects the VHDCI interface of capture card; The pci interface of capture card connects the pci interface of computer, and the VGA interface of computer connects the VGA interface of display device, the RS232 interface device taking alarm of computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201220198375 CN202598147U (en) | 2012-05-04 | 2012-05-04 | Natural gas pipeline leakage monitoring system based on sensing optical fiber |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220198375 CN202598147U (en) | 2012-05-04 | 2012-05-04 | Natural gas pipeline leakage monitoring system based on sensing optical fiber |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016201967A1 (en) * | 2015-06-19 | 2016-12-22 | 河海大学 | Hydraulic structure, and system and method for identifying distributed optical fiber for base seepage condition thereof |
| CN106287236A (en) * | 2015-06-10 | 2017-01-04 | 中国计量学院 | Distributed monitoring leak from oil gas pipe system |
| CN106441627A (en) * | 2016-08-23 | 2017-02-22 | 南京铁道职业技术学院 | System for monitoring temperature based on railway tunnel communication optical cable |
| CN108194839A (en) * | 2017-12-25 | 2018-06-22 | 北京市热力工程设计有限责任公司 | A kind of leakage monitoring cable network based on heat distribution pipeline |
| WO2020052589A1 (en) * | 2018-09-12 | 2020-03-19 | 上海核工程研究设计院有限公司 | Acousto-optic leakage monitoring system for nuclear power plant main steam pipeline |
-
2012
- 2012-05-04 CN CN 201220198375 patent/CN202598147U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106287236A (en) * | 2015-06-10 | 2017-01-04 | 中国计量学院 | Distributed monitoring leak from oil gas pipe system |
| WO2016201967A1 (en) * | 2015-06-19 | 2016-12-22 | 河海大学 | Hydraulic structure, and system and method for identifying distributed optical fiber for base seepage condition thereof |
| GB2556226A (en) * | 2015-06-19 | 2018-05-23 | Univ Hohai | Distributed optical fiber identification system and method for seepage conditions of hydraulic structure and base thereof |
| GB2556226B (en) * | 2015-06-19 | 2018-10-03 | Univ Hohai | Distributed optical fiber identification system and method for seepage conditions of hydraulic structure and base thereof |
| CN106441627A (en) * | 2016-08-23 | 2017-02-22 | 南京铁道职业技术学院 | System for monitoring temperature based on railway tunnel communication optical cable |
| CN108194839A (en) * | 2017-12-25 | 2018-06-22 | 北京市热力工程设计有限责任公司 | A kind of leakage monitoring cable network based on heat distribution pipeline |
| WO2020052589A1 (en) * | 2018-09-12 | 2020-03-19 | 上海核工程研究设计院有限公司 | Acousto-optic leakage monitoring system for nuclear power plant main steam pipeline |
| US11823805B2 (en) | 2018-09-12 | 2023-11-21 | Shanghai Nuclear Engineering Research & Design Institute Co., Ltd. | Acousto-optic leakage monitoring system for nuclear power plant main steam pipeline |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211112 Address after: Room 08-10, 6 / F, block a, No. 5, Dongtucheng Road, Chaoyang District, Beijing 100013 Patentee after: National Petroleum and natural gas pipeline network Group Co.,Ltd. Address before: 100007 Oil Mansion, 9 North Avenue, Dongcheng District, Beijing, Dongzhimen Patentee before: PetroChina Company Limited |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121212 |