CN108758353A - Distribution type fiber-optic many reference amounts pipe leakage positioning alarm system and leakage locating method - Google Patents
Distribution type fiber-optic many reference amounts pipe leakage positioning alarm system and leakage locating method Download PDFInfo
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- CN108758353A CN108758353A CN201810599694.3A CN201810599694A CN108758353A CN 108758353 A CN108758353 A CN 108758353A CN 201810599694 A CN201810599694 A CN 201810599694A CN 108758353 A CN108758353 A CN 108758353A
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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
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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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- General Engineering & Computer Science (AREA)
- Pipeline Systems (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The present invention relates to distribution type fiber-optic many reference amounts pipe leakage positioning alarm system and localization methods, it include the sensor fibre with pipeline laying in one ditch, the DTS system being connected with sensor fibre, at least provided with two groups of suction wave monitoring devices on the pipeline, the suction wave monitoring system, DTS system are connected by communication interface, Ethernet with monitoring center, the suction wave monitoring device includes the pressure flow transmitter being connected with pipeline, pressure flow transmitter is connected with data collector, and the data collector is connected to GPS time service antennas.It is unable to monitor and cannot be accurately positioned the beneficial effects of the invention are as follows the suction wave overcome monitoring and infrasound leakage monitoring system Small leak, distributed fiber optic temperature leakage monitoring system Low Temperature Difference is unable to monitor the defect of leakage；Temperature based on each point that temperature-measuring system of distributed fibers obtains, accurate calculate correct velocity of wave, realize being accurately positioned for leak position.
Description
Technical field
The invention belongs to Monitoring Pinpelines technical field more particularly to distribution type fiber-optic many reference amounts pipe leakage locating alarming systems
System and leakage locating method.
Background technology
Pipeline transportation has unique advantage in terms of Crude Oil Transportation, it has also become after railway, highway, water route, air transportation
The fifth-largest vehicles later, due to inevitable aging, corrosion and drilling hole of oil stolen etc., there is hair in when pipe leakage
Raw, the normal production of severe jamming causes huge economic loss and environmental pollution.Therefore, pipeline leakage testing and positioning
System hits stolen behavior, environmental protection reduces the important realistic meaning of economic loss for finding pipe leakage in time.
Currently, the location technology of Technique of Crude Oil Transport Pipeline Leak monitoring and leak position mainly has：Suction wave leakage monitoring system, it is secondary
Soundwave leakage monitors system, the leakage monitoring system etc. based on distributed fiber optic temperature.Suction wave leakage monitoring system and infrasonic sound
Wave leakage monitoring system is all based on after pipeline leaks, and leakage point will produce suction wave (pressure drop of moment) and infrasonic sound
Wave, the pressure sensor (infrasonic sensor) that two kinds of waves along the upward downstream travel of pipeline, can be mounted on upstream and downstream station library detect
To two kinds of waves, it is analyzed to identify incident of leakage, and the time of the propagation according to wave, is calculated using time, velocity of wave and completes leakage point
Positioning.Suction wave leakage monitoring system, infrasound leakage monitoring system solve the leakage monitoring of crude oil pipeline to a certain extent
Problem, but Small leak, leakage time can not be detected.In addition, since the spread speed of wave and the temperature of medium are related, and bear at present
Wave leakage monitoring system, temperature of the infrasound leakage monitoring system due to that can not know pipeline each point are pressed, can only be obtained approximate
Spread speed, because the precise positioning precision of leakage is not high.Distributed optical fiber temperature sensing system can monitor letting out for crude oil pipeline
Leakage monitoring, but it is unsuitable for the leakage monitoring of Low Temperature Difference (conveying medium temp is low with the environment temperature temperature difference) conveyance conduit, and engineering
The difference of middle optical fiber and pipeline relative position can also influence judgement and the position positioning of incident of leakage.
Invention content
In order to solve the above technical problem, the present invention provides distribution type fiber-optic many reference amounts pipe leakage positioning alarm systems
And leakage locating method, it is therefore an objective to realize that concentrated-distributed optical fiber temperature-measurement, pressure, flow monitor system in the Technique of Crude Oil Transport Pipeline Leak of one
System, overcomes single suction wave leakage monitoring system, infrasound leakage monitoring system and distributed fiber optic temperature leakage monitoring
System defect, it is comprehensive to solve the problems, such as Technique of Crude Oil Transport Pipeline Leak monitoring and leak point positioning.
The technical scheme is that：
Distribution type fiber-optic many reference amounts pipe leakage positioning alarm system, includes the sensor fibre with pipeline laying in one ditch, with
The connected DTS system of sensor fibre, at least provided with two groups of suction wave monitoring devices, suction wave monitoring system on the pipeline
System, DTS systems are connected by network with monitoring center, and the suction wave monitoring device includes the pressure current being connected with pipeline
Transmitter, pressure flow transmitter are connected with data collector, and the data collector is connected to GPS time dissemination systems.
Based on said program, the present invention is also made that following improvement：
Further, the data collector has 8 tunnel 4~20Ma analog inputs, the input of 8 railway digital amounts, 3 tunnel pulses
Amount input, 1 RS232 interface, 1 10/100Mbps network interface embed GPS module.
Further, the DTS system has 1 DEG C of temperature measurement accuracy, measurement distance 20km~30Km, 4 channels.
The invention further relates to a kind of distribution type fiber-optic many reference amounts pipeline leakage positioning methods, including
Step 1, data collector acquire pipeline pressure, data on flows, and pressure data carries GPS time services, and DTS system is adopted
Collect pipeline environment temperature；Collected data are transferred to monitoring center by the two；
Step 2, monitoring center are equipped with pipe leakage temperature change threshold value, the temperature value T that DTS system is acquirediWith threshold value
Compare, can determine whether that pipe leakage at this, leak position are within the scope of director's i degree l more than threshold value；Wherein i is that i-th of temperature is surveyed
Point is measured, the gap length of adjacent measurement points is l；
Step 3, monitoring center analyze pressure data, are judged by detecting leakage method and leak position localization method
Whether generation leakage and leak position；
Step 4, short cycle T are the pipe ends flux cumulating time, and changes in flow rate is more than threshold value in this period, then
Judge that pipeline leaks；
Step 5 realizes incident of leakage assessment and priority processing, prison by the multi-parameter integrated analysis of step 2-four
Measured center carries out comprehensive analysis to many reference amounts, chooses most accurate leak position；Wherein, temperature leakage identification>Suction wave leaks
Identification>The leakage identification of flow many reference amounts.
Wherein, leak position localization method includes in step 3,
1) temperature T is set according to pipeline i-th bitiWhen velocity of wave：
Wherein：Ki(Ti) be crude oil in temperature TiWhen refer to coefficient of elasticity, Pa；ρ(Ti) be crude oil in temperature TiWhen it is close
Degree, kg/m3；E is the elasticity modulus of tubing, and C is correction factor, and the natural number that i is 1 to N be (N=duct lengths (m)/DTS's
In spatial resolution (m)) pipeline specifications D and e are constant；
Wherein, oil density ρ (Ti)=ρ20-ε(Ti- 20), kg/m3；ρ20Density when being 20 DEG C, kg/m3；Crude oil it is swollen
Swollen coefficient, kg/ (m3℃)；
2) pipeline total length L is set, position X of the leakage point apart from head end, the time that suction wave reaches both ends monitoring device is
t1、t2, time difference Δ t, the time overall length that suction wave reaches both ends is t, and temperature measurement interval length is the spatial discrimination of l, that is, DTS
Rate, N sections in total, the time hop counts that suction wave is transmitted to head end from leak position are x, then：
L=N*l,；Δ t=| t1-t2|, t=t1+t2；
AndDue toT simultaneously1Meet formulaIt can pass through approximate algorithm according to formula
Acquire x, position X=x*l of the leakage point apart from head end.
The beneficial effects of the invention are as follows the data fusions by many reference amounts, and it is difficult to solve following crude oil pipeline leakage engineering
Topic：1) Small leak/leakage；2) Low Temperature Difference pipe leakage；3) event recognitions such as card stolen and position positioning.It is comprehensive by many reference amounts
Analysis is closed, incident of leakage assessment and priority processing is realized, improves the accuracy rate of leakage alarm, reduce incident of leakage rate of false alarm.
Multi-parameter integrated analysis improves COMPREHENSIVE LEAKAGE positioning accuracy and leakage alarm speed.
Description of the drawings
Fig. 1 is invention system structural schematic diagram；
Fig. 2 is inventive pipeline leakage locating method flow chart.
In figure, 1, data collector；2, pressure flow transmitter；3, communication interface；4, GPS time dissemination systems；5, DTS systems
System；6, Ethernet；7, pipeline；8, sensing optic cable；9, monitoring center.
Specific implementation mode
As shown in Figure 1, distribution type fiber-optic many reference amounts pipe leakage positioning alarm system, includes the biography with pipeline laying in one ditch
Photosensitive fine 8, the DTS system 5 being connected with sensor fibre 8 is described at least provided with two groups of suction wave monitoring devices on the pipeline 7
Suction wave monitoring system, DTS system 5 are connected by network with monitoring center 9, and the suction wave monitoring device includes and pipeline
7 connected pressure flow transmitters 2, pressure flow transmitter 2 are connected with data collector 1, and the data collector 1 is connected to
GPS time dissemination systems.Network is preferably Ethernet 6, and Ethernet 6 is cable data communication network.Data collector 1 and DTS system
5 are connected by communication interface 3 with Ethernet 6；Communication interface 3 be protocol conversion module, convert data to TCP/IP or
Udp protocol is transferred to monitoring center 10 by Ethernet 6.GPS time dissemination systems 4 provide standard time clock and 1pps pulse per second (PPS)s, after
Person is used to standard time clock being corrected to Millisecond.Data collector 1 is used to acquire pressure, flow signal and GPS time signals,
Standard time clock and 1pps pulse per second (PPS)s are received, the latter is used to standard time clock being corrected to Millisecond, and the pressure signal of acquisition is awarded
When.
There are the data collector 18 tunnel 4~20Ma analog inputs, the input of 8 railway digital amounts, 3 road pulsed quantities to input, and 1
A RS232 interface, 1 10/100Mbps Ethernet interface embed GPS module.
The DTS system 5 has 1 DEG C of a temperature measurement accuracy, spatial resolution 1m (spatial resolution can according to specific requirement fixed),
Measurement distance 20km~30Km, 4 channels.
As shown in Fig. 2, a kind of distribution type fiber-optic many reference amounts pipeline leakage positioning method, including
Step 1, data collector acquire pipeline pressure, data on flows, and pressure data carries the timestamp of GPS time services,
DTS system acquires pipeline environment temperature；Collected data are transferred to monitoring center by the two；
Step 2, monitoring center are equipped with pipe leakage temperature change threshold value, the temperature value T that DTS system is acquirediWith threshold value
Compare, can determine whether that pipe leakage at this, leak position are within the scope of director's i degree l more than threshold value；Wherein i is that i-th of temperature is surveyed
Point is measured, the gap length of adjacent measurement points is l；
Step 3, monitoring center analyze pressure data, are judged by detecting leakage method and leak position localization method
Whether generation leakage and leak position；
Step 4, short cycle T are the pipe ends flux cumulating time, and changes in flow rate is more than threshold value in this period, then
Judge that pipeline leaks；
Step 5 realizes incident of leakage assessment and priority processing, prison by the multi-parameter integrated analysis of step 2-four
Measured center carries out comprehensive analysis to many reference amounts, chooses most accurate leak position；Wherein, temperature leakage identification>Suction wave leaks
Identification>The leakage identification of flow many reference amounts.
Wherein, leak position localization method includes in step 3,
1) temperature T is set according to pipeline i-th bitiWhen velocity of wave：
Wherein：Ki(Ti) be crude oil in temperature TiWhen refer to coefficient of elasticity, Pa；ρ(Ti) be crude oil in temperature TiWhen it is close
Degree, kg/m3；E is the elasticity modulus of tubing, and C is correction factor, and the natural number that i is 1 to N, pipeline specifications D and e are normal
Number；
Wherein, oil density ρ (Ti)=ρ20-ε(Ti- 20), kg/m3；ρ20Density when being 20 DEG C, kg/m3；Crude oil it is swollen
Swollen coefficient, kg/ (m3℃)；
2) pipeline total length L is set, position X of the leakage point apart from head end, the time that suction wave reaches both ends monitoring device is
t1、t2,Time difference Δ t, the time overall length that suction wave reaches both ends are t, and temperature measurement interval length is the spatial discrimination of l, that is, DTS
Rate, N sections in total, the time hop counts that suction wave is transmitted to head end from leak position are x, then：
L=N*l,；Δ t=| t1-t2|, t=t1+t2；
AndDue toT simultaneously1Meet formulaIt can pass through approximate algorithm according to formula
Acquire x, position X=x*l of the leakage point apart from head end.
The application is only illustrated with single tube section crude oil pipeline leakage monitoring and positioning, and however, it is not limited to this, base
In this system architecture, monitoring center utilizes GIS-Geographic Information System, it can be achieved that multi-pipeline integrates leak supervision and positioning；Monitoring center
To big data analysis such as multi-pipeline leakage point position, leakaging causes, Life cycle pipeline management basic data is provided and is met an urgent need
Handle prediction scheme；Communication interface can use the multiple communication modes such as wireless network (WIFI, 3G/4G), meet complicated site environment
Demand, also within the scope of this patent.
Claims (5)
1. distribution type fiber-optic many reference amounts pipe leakage positioning alarm system, it is characterised in that：It include the biography with pipeline laying in one ditch
Photosensitive fibre, the DTS system being connected with sensor fibre, the pipeline head end and tail end are equipped with two groups of suction wave monitoring devices, described
Suction wave monitoring system, DTS system are connected by network with monitoring center, and the suction wave monitoring device includes and pipeline phase
Pressure flow transmitter even, pressure flow transmitter are connected with data collector, and the data collector is connected to GPS time services system
System.
2. distribution type fiber-optic many reference amounts pipe leakage positioning alarm system according to claim 1, it is characterised in that：It is described
There are data collector 8 tunnel 4~20Ma analog inputs, the input of 8 railway digital amounts, 3 road pulsed quantities to input, 1 RS232 interface, and 1
A 10/100Mbps network interfaces embed GPS module.
3. distribution type fiber-optic many reference amounts pipe leakage positioning alarm system according to claim 1, it is characterised in that：It is described
DTS system has 1 DEG C, spatial resolution 1m, measurement distance 20km~30Km of temperature measurement accuracy, 4 channels.
4. distribution type fiber-optic many reference amounts pipeline leakage positioning method, it is characterised in that：
Step 1, data collector acquire pipeline pressure, data on flows, and pressure data carries GPS time services, DTS system collection tube
Road environment temperature；Collected data are transferred to monitoring center by the two；
Step 2, monitoring center are equipped with pipe leakage temperature change threshold value, the temperature value T that DTS system is acquirediWith threshold value comparison,
It can determine whether that pipe leakage at this, leak position are within the scope of director's i degree l more than threshold value；Wherein i is i-th of temperature measuring point,
The gap length of adjacent measurement points is l；
Step 3, monitoring center analyze pressure data, are judged whether by detecting leakage method and leak position localization method
Leakage and leak position occurs；
Step 4, short cycle T are the pipe ends flux cumulating time, and changes in flow rate is more than threshold value in this period, then judges
Pipeline leaks；
Step 5 realizes incident of leakage assessment and priority processing, wherein temperature by the multi-parameter integrated analysis of step 2-four
Degree leakage identification>Suction wave leakage identification>The leakage identification of flow many reference amounts.
5. distribution type fiber-optic many reference amounts pipeline leakage positioning method according to claim 4, it is characterised in that：In step 3
Leak position localization method includes,
1) temperature T is set according to pipeline i-th bitiWhen velocity of wave：
Wherein：Ki(Ti) be crude oil in temperature TiWhen refer to coefficient of elasticity, Pa；ρ(Ti) be crude oil in temperature TiWhen density,
kg/m3；E is the elasticity modulus of tubing, and C is correction factor, the natural number that i is 1 to N, the space of N=duct lengths (m)/DTS
Resolution ratio, pipeline specifications D and e, are constant,；
Wherein, oil density ρ (Ti)=ρ20-ε(Ti- 20), kg/m3；ρ20Density when being 20 DEG C, kg/m3；The expansion system of crude oil
Number, kg/ (m3℃)；
2) pipeline total length L, position X of the leakage point apart from head end are set, the time that suction wave reaches both ends monitoring device is t1、t2,
Time difference Δ t, the time overall length that suction wave reaches both ends are t, and temperature measurement interval length is l (spatial resolution of DTS), always
N sections total, the time hop counts that suction wave is transmitted to head end from leak position are x, then：
L=N*l,；Δ t=| t1-t2|, t=t1+t2；
AndDue toT simultaneously1Meet formulaIt can be acquired by approximate algorithm according to formula
X, position X=x*l of the leakage point apart from head end.
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| CN109783972A (en) * | 2019-01-30 | 2019-05-21 | 河北工业大学 | Monitoring method of leakage flow in check valve based on fluid-structure coupling analysis and calculation |
| CN110566821A (en) * | 2019-09-09 | 2019-12-13 | 山东拙诚智能科技有限公司 | method for realizing downstream pipe network leakage detection by monitoring pressure state of pressure regulating device |
| CN110748801A (en) * | 2019-11-05 | 2020-02-04 | 深圳汉光电子技术有限公司 | Pipeline leakage detection method, device and system |
| CN112344221A (en) * | 2020-11-04 | 2021-02-09 | 陕西神渭煤炭管道运输有限责任公司 | Equipment and method for detecting pipeline leakage by photoelectric signal |
| CN113029443A (en) * | 2021-03-22 | 2021-06-25 | 中国科学院上海光学精密机械研究所 | Ultra-deep underground wall leakage risk detection method based on distributed optical fiber sensing |
| CN113236986A (en) * | 2021-06-30 | 2021-08-10 | 杭州艾科赛德电子科技有限公司 | Pipeline leakage monitoring system based on sonar detection |
| CN113313033A (en) * | 2021-05-31 | 2021-08-27 | 常州汉腾自动化设备有限公司 | Heat supply pipe network digital monitoring system based on sensor of Internet of things |
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| CN109783972A (en) * | 2019-01-30 | 2019-05-21 | 河北工业大学 | Monitoring method of leakage flow in check valve based on fluid-structure coupling analysis and calculation |
| CN109783972B (en) * | 2019-01-30 | 2022-11-08 | 河北工业大学 | Monitoring method of leakage flow in check valve based on fluid-structure coupling analysis and calculation |
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