CN202903136U - Oil-gas pipeline displacement monitoring system in frozen soil region - Google Patents
Oil-gas pipeline displacement monitoring system in frozen soil region Download PDFInfo
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- CN202903136U CN202903136U CN 201220200082 CN201220200082U CN202903136U CN 202903136 U CN202903136 U CN 202903136U CN 201220200082 CN201220200082 CN 201220200082 CN 201220200082 U CN201220200082 U CN 201220200082U CN 202903136 U CN202903136 U CN 202903136U
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Abstract
The utility model relates to an oil-gas pipeline displacement monitoring system in a frozen soil region. A fiber grating displacement sensor group is arranged on one side of an oil-gas pipeline (2) in the frozen soil region, wherein all sensors are connected in series and welded; an optical fiber (12) is led into a monitoring station, wherein the optical fiber (12) is connected with an optical switch (13), the optical switch (13) is connected with a fiber grating demodulator (14), and the fiber grating demodulator (14) is connected with a lower computer (15); and data pre-processed by the lower computer (15) is transmitted to a low-track satellite (17) via a satellite communication module (16), the low-track satellite (17) forwards the data to another satellite communication module (18), and the satellite communication module (18) transmits the received data to a host computer (19) for analyzing and processing. The oil-gas pipeline displacement monitoring system in the frozen soil region is high in precision and stability and low in cost.
Description
Technical field
The utility model is a kind of permafrost region oil and gas pipes system for monitoring displacement based on fiber grating sensing technology, and measurement, other class that relates to measurement of length, temperature do not comprise measurement, general control system and piping system technical field.
Background technology
Frozen soil is a kind of special great soil group, and temperature is subzero temperature or zero temperature, and contains the soil of ice, is called frozen soil.By the length of native frozen state retention time, frozen soil generally can be divided into again in short-term frozen soil (a few hours are to first quarter moon), seasonal frozen ground (first quarter moon is to the several months) and ever frost (more than 2 years).China's frozen soil is grown very much, and the ever frost area is about 2,110,000 square kilometres, accounts for 23% of China's territory total area, accounts for the 3rd in the world, mainly is distributed in Qinghai-Tibet Platean, western high mountain and northeast Xing'anling mountains; The frost zone area is about 5,140,000 square kilometres, accounts for 53.5% of territory total area.Wherein, middle degree of depth seasonal frozen ground (〉 1m) account for 1/3 of area, mainly be distributed in the ground such as three provinces in the northeast of China, the Inner Mongol, Gansu, Ningxia, In The North of Xinjiang, Qinghai and Chuan Xi.
Oneself has more than 100 year history developed country's oil pipeline construction, and a lot of Frozen Ground Areas are contained huge hydrocarbon resources, and correspondingly the oil and gas pipes engineering design and construction becomes the up-to-date challenge of these regional petroleum industries.Since the sixties in 20th century, large diameter pipeline begins leading northern North america and Siberia Permafrost Area oil gas field transports market.During the Second World War, gram is exerted (Canol) pipeline and is transported crude oil to the Fairbanks city, Alaska State (Fairbanks) of the U.S. from Canadian Luo Man well; The oil pipe that caliber in 1956 is 203mm is built successfully to the Fei Bankesi city from this city of Alaska State glycolylurea (Haines); 20 century 70s are early stage, and the USSR (Union of Soviet Socialist Republics) Permafrost Area has oil pipeline; 1977, long 1280km, diameter are that the oil pipeline of 1220mm is transported to the natural warm water port Wa Erdisi (Valdez) in south, Alaska continuously with the crude oil of U.S.'s Alaska State north slope low temperature Permafrost Area, then oil tanker with crude oil transportation to the California.20th century the mid-80, economize the environment temperature pipeline of northern our horse (Zama) lake, long 869km, bore 30.5cm from Canadian Luo Man well to Canadian Ahlport (Alberta) and finish laying on time, the Luo Man well conduit is the oil pipeline that Canadian Permafrost Area article one is buried underground fully.These pipelines all are subject to threat even the destruction of permafrost region frozen swell and melt settlement disaster during runing.Wherein, gram is exerted (Canol) pipeline after bringing into operation front 9 months, and pipeline has 700x10 along the line approximately
4The L crude oil leakage.12700m on the Mackenzie riverbank
3Storage tank farm break, most of oil storage flows in the river.Behind the Japan surrenders in 1945, this pipeline is removed soon; The Luo Man well conduit is along the line by way of discontinuous ever frost, construction and frost heave and the thaw collapse problem of meeting in service, by reaching the monitoring in 17 years, find that pipeline ever frost along the line continues to melt and sedimentation causes thaw depth to reach 3-5m (gyittja) or 5-7m (coarse particle mineral soil), and significant land subsidence.
The long oil and gas pipeline of article one that China builds in Permafrost Area, i.e. Golmud-Lhasa oil pipeline (be called for short lattice backguy), the lattice backguy was constructed by the Chinese People's Liberation Army in 1972, substantially built up in 1977, and reached 1076km, caliber 159mm, thickness of pipe 6mm, investment 2.3x108 unit.Lattice backguy engineering is built and is safeguarded very difficultly, and completely the spanning of river is 108, road crossing 123 places, and more than 900 kilometer pipeline (highest point height above sea level 5200m) more than height above sea level 4000m, 560km is positioned at Permafrost Area, and freezing period, reach 8 months.The lattice backguy is since operation in 1977, and frost heave, thaw collapse problem have caused repeatedly " revealing pipe " phenomenon.
China-Russia Crude Oil Pipeline reaches the grand celebration terminal in the south North gets boundary line, Sino-Russian Heilungkiang, Mo River initial station, and more than 960 kilometer of total length by way of two provinces, 12 counties and districts in five cities, passed through 440 kilometers virgin forests, 11 big-and-middle-sized rivers, 5 wilderness areas.High south, pipeline physical features along the line north is low, and northern topographic relief is larger, is Daxing'an Mountainrange low mountain, hills and river valley geomorgy along the line, and the south is song-Nen plain, and landform is smooth open; Mo River-about 460km of Jagdaqi section is mountain area, forest zone, Permafrost Area, and the about 314km of ever frost total length wherein ices, ices more ever frost 209km less, full ice, rich ice ever frost 62km, frozen soil marsh 43km.Pipeline is faced with serious frozen swell and melt settlement disaster and threatens.
For the frozen swell and melt settlement problem that pipeline faces, unit of operation has taked positive counter-measure both at home and abroad.After the Luo Man well conduit was gone into operation in 1985, the daily monitoring plan of pipeline is being implemented as the important component part of project operation always, except weekly aircraft aerial surveillance, also a large amount of measuring instruments has been installed with the record service data along the line at pipeline, and in annual September, carry out an on-site land survey when namely pipe sedimentation is maximum with the record of finishing pipeline on-site inspection along the line, instrument data and the work such as site assessment of coming down the location.After 1989, the Luo Man well conduit adopts in-pipeline detector to carry out annual interior detection, to assess the motion of the unstable soil body and otherness thaw collapse to the influence degree of pipeline, along with continuous accumulation and the expansion of detection data, for the assessment of pipe technology performance provides good basis.Norman wells pipeline is the oil and gas pipes that article one is embedded in Canadian northern Permafrost Area, be in charge of and run by adding by Enbridge company, under the requirement of various regulations rules, set up one and planned monitoring system careful, strong operability, comprising the content of seven aspects such as the monitoring of frozen soil thaw collapse, pipeline detection, warpage arch detection, wrinkle detection, slope test, the detection of wood chip stratiform condition and temperature monitoring.The variation of frozen soil is also monitored in lattice trombone slide road by regular line walking, setting pressure, temperature sensor etc.
Although pipeline unit of operation has taked the frozen swell and melt settlement disaster of positive measure reply permafrost region both at home and abroad, but because the formation mechanism of frozen swell and melt settlement disaster is very complicated, and the frozen soil characteristic of different regions is different, at present both at home and abroad and there are no the monitoring technology of maturation, can monitor the frozen swell and melt settlement disaster to the impact of pipeline.
The utility model content
The purpose of this utility model is design a kind of high precision, high stability, cheaply based on the permafrost region oil and gas pipes system for monitoring displacement of fiber grating sensing technology.
The utility model proposes a kind of permafrost region oil and gas pipes system for monitoring displacement based on fiber grating sensing technology.System adopts fiber grating sensing technology, and the oil and gas pipes under frozen soil and the impact thereof is carried out combined monitoring.And made up monitoring system, realized real-time automatic collecting, remote transmission and the automatic analysis of data.
This permafrost region oil and gas pipes system for monitoring displacement as shown in Figure 1, this system is divided into on-site data gathering transmission subsystem and data analysis display subsystem, specifically comprises fiber grating displacement sensor group, field monitoring station, remote monitoring center.
The overall formation of permafrost region oil and gas pipes monitoring system as shown in Figure 1.Oil and gas pipes 2 one sides at permafrost region 1, a plurality of fiber grating displacement sensor a10 are installed, the fiber grating displacement sensor group that fiber grating displacement sensor b11 forms, the all the sensors series welding, then guide in the monitoring station by optical cable 12, optical cable 12 is connected with photoswitch 13, photoswitch 13 is connected with fiber Bragg grating (FBG) demodulator 14, fiber Bragg grating (FBG) demodulator 14 is connected with slave computer 15, slave computer 15 pretreated data communication devices are crossed the first satellite communication module 16 and are transferred to low-orbit satellite 17, low-orbit satellite 17 forwards the data to the second satellite communication module 18 after receiving data, the second satellite communication module 18 is analyzed the data transmission that receives and process to host computer 19, thereby realizes the safety monitoring to the permafrost region oil and gas pipes.
A plurality of fiber grating displacement sensor a10, fiber grating displacement sensor b11 pass to photoswitch 13 with the body displacement signal through optical cable 12 respectively, reach slave computer 15 through fiber Bragg grating (FBG) demodulator 14 demodulation, slave computer 15 calls self-editing program, control photoswitch 13 and fiber Bragg grating (FBG) demodulator 14 are realized data acquisition and data are carried out pre-service; Pretreated data communication device is crossed the first satellite communication module 16 and is transferred to low-orbit satellite 17, low-orbit satellite 17 forwards the data to the second satellite communication module 18 after receiving data, the second satellite communication module 18 is analyzed the data transmission that receives and process to host computer 19, judges the safe condition of permafrost region pipeline.The pre-service of slave computer data mainly is that the optical wavelength data with the fiber Bragg grating (FBG) demodulator collection are converted into displacement data, and host computer at first with Data classification, is drawn out the trend map of piping displacement behind receive data.
The theory diagram of permafrost region oil and gas pipes system for monitoring displacement as shown in Figure 3, it is divided into on-site data gathering transmission subsystem and data analysis display subsystem.The composition of on-site data gathering transmission subsystem is: the output of fiber grating displacement sensor connects the input of photoswitch, the output of photoswitch connects the input of fiber Bragg grating (FBG) demodulator, fiber Bragg grating (FBG) demodulator output connects the input of slave computer, and slave computer output connects the first satellite communication module.The on-site data gathering transmission subsystem is communicated by letter with the data analysis display subsystem by low-orbit satellite.The composition of data analysis display subsystem is: the output of the second satellite communication module connects the input of host computer, and host computer output permafrost region piping displacement dynamically shows.
The electric principle of this system as shown in Figure 4, the FC joint of fiber grating displacement sensor group respectively with the FC input port 1 of photoswitch, FC input port 2, FC input port 3 connects, the R232 port of photoswitch connects the R232 port one of slave computer, the FC output port of photoswitch connects the FC input port of fiber Bragg grating (FBG) demodulator, the LAN port of fiber Bragg grating (FBG) demodulator connects the LAN port of slave computer, the VGA of slave computer is connected with the VGA of display, the R232 port 2 of slave computer connects the R232 port of the first satellite communication module 16, the first satellite communication module 16 transfers data to low-orbit satellite, low-orbit satellite forwards the data to the second satellite communication module 18 in real time, by the R232 port of R232 port transmission to host computer, host computer exports display to by the VGA port after data analysis is processed to the second satellite communication module 18 with receive data.
The fiber grating displacement sensor signal through photoswitch 13 one by one conducting transfer to fiber Bragg grating (FBG) demodulator 14, the centre wavelength that fiber Bragg grating (FBG) demodulator 14 demodulates each fiber-optic grating sensor transfers to slave computer 15, and the cycle of photoswitch 13 Continuity signals is by slave computer 15 controls.15 pairs of data of slave computer are carried out pre-service, and the data after will processing are defeated by the first satellite communication module 16, the first satellite communication module 16 transfers data to low-orbit satellite 17, low-orbit satellite 17 forwards the data to the second satellite communication module 18 in real time, the second satellite communication module 18 transfers to host computer with receive data, host computer carries out analyzing and processing to data, is shown by display.
Fiber grating displacement sensor is for developing voluntarily sensor.Fiber grating displacement sensor adopts temp. compensation type, has got rid of the impact of temperature on measurement result, has improved the measuring accuracy of displacement transducer.
Except the foregoing circuit part, the formation of the fiber grating displacement sensor group of permafrost region oil and gas pipes monitoring system is:
The formation of pipeline fiber grating displacement sensor group is as shown in Figure 2: near oil and gas pipes 2, install and fix bar 21, fixed bar 21 is deep into permafrost soil layer certain depth, can not be moved guaranteeing.At fixed bar 21 slide block 22 is installed, slide block 22 is welding with thin expansion link 23 connected modes, and thin expansion link 23 stretches in the thick expansion link 24, and thick expansion link 24 interior filling butter can move flexibly to guarantee thin expansion link 23.Thick expansion link 24 links together by pipe clamp 25 with oil and gas pipes 2, and thick expansion link 24 is welding with pipe clamp 25 connected modes.Like this, when oil and gas pipes 2 is moved, the displacement meeting is passed to thick expansion link 24 by pipe clamp 25, thick expansion link 24 passes to thin expansion link 23 with displacement, thin expansion link 23 passes to slide block 22 with displacement, slide block 22 is connected with fiber grating displacement sensor 26, and wherein fiber grating displacement sensor 26 is large displacement sensor, needs when mounted to impose certain pretension.Fiber grating displacement sensor 26 is connected with data collector by cable junction box 27, realizes the monitoring of body displacement.
The advantage of native system shows:
(1) proposes to descend oil and gas pipes to carry out the system of combined monitoring on permafrost region and impact thereof, disclosed frozen soil effect lower tube body stress characteristic and body and the interactional feature of frozen soil; Carry out the safe early warning of the lower oil and gas pipes of frozen soil impact with many indexs;
(2) fiber grating sensing technology is applied to permafrost region pipeline monitoring, this technology is anti-interference, corrosion-resistant, it is with the obvious advantage to be easy to networking etc.; This technology is easy to realize automatic real time on-line monitoring, and cost is lower;
(3) piping displacement monitoring, according to the feature of pipeline place permafrost region, install and fix bar in pipeline one side, adopt the connected mode of expansion link that pipeline and fixed bar are linked together, installing optical fibres grating displacement sensor on fixed bar, the displacement situation of monitoring pipeline; This monitoring method has been avoided distinguishing by the excavation pipeline whether pipeline is subjected to displacement, the selection of carrying out protection works opportunitys for the permafrost region oil and gas pipes provides effective foundation, reduced the blindness of protection works and saved the conduit running cost, also guaranteed the security of operation of pipeline simultaneously, the construction when having reduced the excavation checking is dangerous.
Description of drawings
Fig. 1 adopts permafrost region oil and gas pipes monitoring method schematic diagram
Fig. 2 permafrost region piping displacement monitoring device figure
Fig. 3 permafrost region oil and gas pipes Fundamentals of Supervisory Systems block diagram
Fig. 4 permafrost region oil and gas pipes monitoring system electrical schematic diagram
1-permafrost region, 2-pipeline a wherein
10-fiber grating displacement sensor a
11-fiber grating displacement sensor b, 12-optical cable
13-photoswitch, 14-fiber Bragg grating (FBG) demodulator
15-slave computer, 16-satellite communication module a
17-low-orbit satellite, 18-satellite communication module b
19-host computer, 20-pipeline b
21-fixed bar, 22-slide block
23-thin expansion link 24-thick expansion link
25-pipe clamp, 26-fiber grating displacement sensor c
27-cable junction box a
Embodiment
Embodiment. this example is a kind of pilot system, and tests for the permafrost region of the full ice of rich ice at frost zone thickness 2m, frozen soil type, buried depth of pipeline 2m wherein, pipe diameter is that 813mm, wall thickness are 10mm, grade of steel X65.
The overall formation of permafrost region oil and gas pipes system for monitoring displacement as shown in Figure 1, theory diagram is as shown in Figure 3.Permafrost region 1 in oil and gas pipes 2 one sides, installing optical fibres grating displacement sensor 10,11, the all the sensors series welding, then guide in the monitoring station by optical cable 12, optical cable 12 is connected with photoswitch 13, photoswitch 13 is connected with fiber Bragg grating (FBG) demodulator 14, fiber Bragg grating (FBG) demodulator 14 is connected with slave computer 15, slave computer 15 pretreated data communication devices are crossed the first satellite communication module 16 and are transferred to low-orbit satellite 17, low-orbit satellite 17 forwards the data to the second satellite communication module 18 after receiving data, the second satellite communication module 18 is analyzed the data transmission that receives and process to host computer 19, thereby realizes the safety monitoring to the permafrost region oil and gas pipes.
The electric principle of this example as shown in Figure 4, the FC joint of fiber grating displacement sensor group respectively with the FC input port 1 of photoswitch, FC input port 2, FC input port 3 connects, the R232 port of photoswitch connects the R232 port one of slave computer, the FC output port of photoswitch connects the FC input port of fiber Bragg grating (FBG) demodulator, the LAN port of fiber Bragg grating (FBG) demodulator connects the LAN port of slave computer, the VGA of slave computer is connected with the VGA of display, the R232 port 2 of slave computer connects the R232 port of the first satellite communication module, the first satellite communication module transfers data to low-orbit satellite, low-orbit satellite forwards the data to the second satellite communication module in real time, by the R232 port of R232 port transmission to host computer, host computer exports display to by the VGA port after data analysis is processed to the second satellite communication module with receive data.
The fiber grating displacement sensor signal through photoswitch 13 one by one conducting transfer to fiber Bragg grating (FBG) demodulator 14, the centre wavelength that fiber Bragg grating (FBG) demodulator 14 demodulates each fiber-optic grating sensor transfers to slave computer 15, and the cycle of photoswitch 13 Continuity signals is by slave computer 15 controls.15 pairs of data of slave computer are carried out pre-service, and the data after will processing are defeated by the first satellite communication module 16, the first satellite communication module 16 transfers data to low-orbit satellite 17, low-orbit satellite 17 forwards the data to the second satellite communication module 18 in real time, the second satellite communication module 18 transfers to host computer with receive data, host computer carries out analyzing and processing to data, is shown by display.
Wherein:
Fiber grating displacement sensor: the displacement transducer of selecting the designed, designed encapsulation;
Optical cable: select middle day scientific and technological GYTA-12B1;
Photoswitch: select light to swell scientific and technological SUM-FSW;
Fiber Bragg grating (FBG) demodulator: select SM130;
Slave computer and program: select and grind magnificent IPC-610, program is self-editing;
Telstar module: the ST2500 of STELLAR company;
Host computer and program: select and grind magnificent IPC-610, program is self-editing;
Wherein:
The formation of pipeline fiber grating displacement sensor group as shown in Figure 2.Near pipeline 20, install and fix bar 21, fixed bar 21 is deep into permafrost soil layer certain depth, can not be moved with assurance.At fixed bar 21 slide block 22 is installed, slide block 22 is welding with thin expansion link 23 connected modes, and thin expansion link 23 stretches in the thick expansion link 24, and thick expansion link 24 interior filling butter can move flexibly to guarantee thin expansion link 23.Thick expansion link 24 links together by pipe clamp 25 with pipeline 20, and thick expansion link 24 is welding with pipe clamp 25 connected modes.Like this, when pipeline 20 is moved, the displacement meeting is passed to thick expansion link 24 by pipe clamp 25, thick expansion link 24 passes to thin expansion link 23 with displacement, thin expansion link 23 passes to slide block 22 with displacement, slide block 22 is connected with fiber grating displacement sensor 26, and wherein fiber grating displacement sensor 26 is large displacement sensor, needs when mounted to impose certain pretension.Fiber grating displacement sensor 26 is connected with data collector by cable junction box 27, realizes the monitoring of body displacement.
Native system is when monitoring, displacement monitoring then can reflect the safe condition of pipeline in real time, when permafrost region generation frozen swell and melt settlement disaster, the pipeline that is embedded in soil body below is subject to the frozen soil effect and is subjected to displacement, the displacement of pipeline passes to fiber grating displacement sensor by displacement monitor, the data of displacement transducer are transferred to host computer and show that in real time host computer is done contrast with piping displacement amount and alarm threshold value automatically after slave computer is processed, exceed the threshold value alarm.
Through for a long time monitoring, this example is easy to make up monitoring system, is easy to realize real-time automatic collecting analysis and the long-range issue of permafrost region pipeline Monitoring Data, long-range real-time automatic alarm.Avoided loaded down with trivial details artificial image data, improved the precision of early warning, reduced time of fire alarming, can also accurately locate place of alarm simultaneously, this to the pipeline emergency measure take most important.
Claims (5)
1. a permafrost region oil and gas pipes system for monitoring displacement is characterized in that this system is divided into on-site data gathering transmission subsystem and data analysis display subsystem, specifically comprises fiber grating displacement sensor group, field monitoring station, remote monitoring center;
Totally constituting of permafrost region oil and gas pipes monitoring system: in oil and gas pipes (2) one sides of permafrost region (1), a plurality of fiber grating displacement sensor a (10) are installed, the fiber grating displacement sensor group that fiber grating displacement sensor b (11) forms, all the sensors is connected with optical cable (12), then guide in the monitoring station by optical cable (12), optical cable (12) is connected with photoswitch (13), photoswitch (13) is connected with fiber Bragg grating (FBG) demodulator (14), fiber Bragg grating (FBG) demodulator (14) is connected with slave computer (15), the pretreated data communication device of slave computer (15) is crossed the first satellite communication module (16) and is transferred to low-orbit satellite (17), low-orbit satellite (17) forwards the data to the second satellite communication module (18) after receiving data, and the second satellite communication module (18) is analyzed the data transmission that receives and process to host computer (19);
A plurality of fiber grating displacement sensor a (10), fiber grating displacement sensor b (11) pass to photoswitch (13) with the body displacement signal through optical cable (12) respectively, reach slave computer (15) through fiber Bragg grating (FBG) demodulator (14) demodulation, slave computer (15) control photoswitch (13) and fiber Bragg grating (FBG) demodulator (14) carry out data acquisition and data are carried out pre-service; Pretreated data communication device is crossed the first satellite communication module (16) and is transferred to low-orbit satellite (17), low-orbit satellite (17) forwards the data to the second satellite communication module (18) after receiving data, the second satellite communication module (18) is analyzed the data transmission that receives and process to host computer (19), judges the safe condition of permafrost region pipeline.
2. a kind of permafrost region oil and gas pipes system for monitoring displacement according to claim 1, it is characterized in that its theory diagram is: it is divided into on-site data gathering transmission subsystem and data analysis display subsystem; The composition of on-site data gathering transmission subsystem is: the output of fiber grating displacement sensor connects the input of photoswitch, the output of photoswitch connects the input of fiber Bragg grating (FBG) demodulator, fiber Bragg grating (FBG) demodulator output connects the input of slave computer, and slave computer output connects the first satellite communication module (16); The on-site data gathering transmission subsystem is connected with the data analysis display subsystem by low-orbit satellite; The composition of data analysis display subsystem is: the second satellite communication module (18) output connects the input of host computer, and host computer output permafrost region piping displacement dynamically shows.
3. a kind of permafrost region oil and gas pipes system for monitoring displacement according to claim 1 and 2, the electric principle that it is characterized in that this system is: the FC joint of fiber grating displacement sensor group respectively with the FC input port 1 of photoswitch, FC input port 2, FC input port 3 connects, the R232 port of photoswitch connects the R232 port one of slave computer, the FC output port of photoswitch connects the FC input port of fiber Bragg grating (FBG) demodulator, the LAN port of fiber Bragg grating (FBG) demodulator connects the LAN port of slave computer, the VGA of slave computer is connected with the VGA of display, the R232 port 2 of slave computer connects the R232 port of the first satellite communication module (16), the first satellite communication module (16) transfers data to low-orbit satellite, low-orbit satellite forwards the data to the second satellite communication module (18) in real time, by the R232 port of R232 port transmission to host computer, host computer exports display to by the VGA port after data analysis is processed to the second satellite communication module (18) with receive data;
The fiber grating displacement sensor signal through photoswitch (13) one by one conducting transfer to fiber Bragg grating (FBG) demodulator (14), the centre wavelength that fiber Bragg grating (FBG) demodulator (14) demodulates each fiber-optic grating sensor transfers to slave computer (15), and the cycle of photoswitch (13) Continuity signal is controlled by slave computer (15); Slave computer (15) carries out pre-service to data, and the data after will processing are defeated by the first satellite communication module (16), the first satellite communication module (16) transfers data to low-orbit satellite (17), low-orbit satellite (17) forwards the data to the second satellite communication module (18) in real time, the second satellite communication module (18) transfers to host computer (19) with receive data, host computer (19) carries out analyzing and processing to data, is shown by display.
4. a kind of permafrost region oil and gas pipes system for monitoring displacement according to claim 1 and 2 is characterized in that described fiber grating displacement sensor adopts the temp. compensation type structure.
5. a kind of permafrost region oil and gas pipes system for monitoring displacement according to claim 1, the formation that it is characterized in that described pipeline fiber grating displacement sensor group is: near oil and gas pipes (2), install and fix bar (21), fixed bar (21) is deep into permafrost soil layer certain depth; At fixed bar (21) slide block (22) is installed, slide block (22) is welding with thin expansion link (23) connected mode, and thin expansion link (23) stretches in the thick expansion link (24), fills butter in the thick expansion link (24); Thick expansion link (24) links together by pipe clamp (25) with oil and gas pipes (2), and thick expansion link (24) is welding with pipe clamp (25) connected mode; Wherein fiber grating displacement sensor (26) is large displacement sensor, needs when mounted to impose certain pretension; Fiber grating displacement sensor (26) is connected with data collector by cable junction box (27).
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| CN 201220200082 CN202903136U (en) | 2012-05-04 | 2012-05-04 | Oil-gas pipeline displacement monitoring system in frozen soil region |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383243A (en) * | 2012-05-04 | 2013-11-06 | 中国石油天然气股份有限公司 | Freeze soil area oil and gas pipeline displacement monitoring method and system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103383243A (en) * | 2012-05-04 | 2013-11-06 | 中国石油天然气股份有限公司 | Freeze soil area oil and gas pipeline displacement monitoring method and system |
| CN103383243B (en) * | 2012-05-04 | 2016-12-14 | 中国石油天然气股份有限公司 | A kind of permafrost region oil and gas pipes displacement monitoring method and system |
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