CN103383286B - Permafrost region oil-gas pipeline ambient temperature monitoring system - Google Patents
Permafrost region oil-gas pipeline ambient temperature monitoring system Download PDFInfo
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Abstract
The invention provides a permafrost region oil-gas pipeline ambient temperature monitoring system based on a fiber Bragg grating sensing technology. A fiber Bragg grating temperature sensor set is arranged on the surface and the periphery of an oil-gas pipeline (2) in a permafrost region. All fiber Bragg grating temperature sensors are connected in series in a welding mode and are guided into a monitoring station through an optical cable (12) which is connected with an optical switch (13). The optical switch (13) is connected with a fiber Bragg grating demodulation instrument (14) which is connected with a lower computer (15). Data preprocessed by the lower computer are transmitted to a low orbit satellite (17) through a satellite communication module (16). The low orbit satellite (17) sends the data to a satellite communication module (18) in a forwarding mode. The satellite communication module (18) transmits the received data to an upper computer (19) for analyzing and processing. The permafrost region oil-gas pipeline ambient temperature monitoring system is high in accuracy and stability and low in cost.
Description
Technical field
The present invention is a kind of permafrost region oil and gas pipes environment temperature monitoring system based on fiber grating sensing technology, is related to
Measurement of length, the measurement of temperature, other class do not include measurement, general control system and tubing technical field.
Background technology
Frozen soil is a kind of special great soil group, and temperature is subzero temperature or zero temperature, and the soil containing ice, referred to as frozen soil.By soil
The length of frozen state retention time, frozen soil typically can be divided into frozen soil (a few hours are to first quarter moon), seasonal frozen ground in short-term again, and (first quarter moon is extremely
Several months) and ever-frozen ground (more than 2 years).China's frozen soil is developed very much, and ever-frozen ground area is about 2,110,000 square kilometres, accounts for
The 23% of China's territory total area, accounts for the 3rd in the world, is mainly distributed on Qinghai-Tibet Platean, western high mountain and northeast large and small
Xing'an Mountains；Frost zone area is about 5,140,000 square kilometres, accounts for the 53.5% of territory total area.Wherein, middle depth season
Frozen soil (＞ 1m) accounts for the 1/3 of area, is distributed mainly on three provinces in the northeast of China, the Inner Mongol, Gansu, Ningxia, In The North of Xinjiang, Qinghai
With Chuan Xi and other places.
Existing more than the 100 year history of developed country's oil pipeline construction, a lot of Frozen Ground Areas are contained huge petroleum resources,
Correspondingly oil and gas pipes engineering design and construction becomes the up-to-date challenge of these regional petroleum industries.Open from the sixties in 20th century
Begin, large diameter pipeline starts leading northern North america and Siberia Permafrost Area oil gas field transports market.During the Second World War, gram
Exert (canol) pipeline and transport crude oil to the Alaska State Fairbanks city of the U.S. from Canadian Luo Man well
(fairbanks)；Caliber in 1956 is that the oil pipe of 203mm is repaiied to Fei Bankesi city from this city of Alaska State glycolylurea (haines)
Build up work(；20 century 70 early stages, the existing oil pipeline in former Soviet Union Permafrost Area；1977, long 1280km, a diameter of
The crude oil of U.S. Alaska State north slope low temperature Permafrost Area is continuously transported to me by the oil pipeline of 1220mm
This add south natural ice-free port Wa Erdisi (valdez), then oil tanker by crude oil transportation to California.In the eighties in 20th century
Phase, save our horse (zama) lake, long 869km, bore northern from Canadian Luo Man well to Canadian Ahlport (alberta)
The ambient temperature pipeline of 30.5cm is timely completed laying, and Luo Man well conduit is that Canadian Permafrost Area first is completely embedded
Oil pipeline.These pipelines, during runing, are all even destroyed by the threat of permafrost region frozen swell and melt settlement disaster.Wherein, Ke Nu
First 9 months after bringing into operation, pipeline there are about 700x10 to youngster (canol) pipeline along the line4L crude oil leakage.On mackenzie riverbank
One 12700m3Storage tank farm rupture, most of oil storage flows in river.After Japan surrenders in 1945, this pipeline soon by
Remove；Luo Man well conduit, along the line by way of discontinuous ever-frozen ground, meets frost heave and thaw collapse problem, by being up in construction and operation
The monitoring of 17 years, finds that pipeline ever-frozen ground along the line persistently melts and sedimentation leads to thaw depth to reach 3-5m (gyittja) or 5-
7m (coarse granule mineral soil), and significant surface subsidence.
First long-distance oil ＆ gas pipeline that China builds in Permafrost Area, that is, Golmud-Lhasa oil pipeline is (referred to as
Lattice bracing wire), lattice bracing wire was constructed by the Chinese People's Liberation Army in 1972, substantially built up within 1977, up to 1076km, caliber
159mm, thickness of pipe wall 6mm, investment 2.3x108 unit.Lattice bracing wire engineering is built and is safeguarded very difficult, all fronts river crossing 108,
At highway crossing 123, at more than height above sea level 4000m (highest point height above sea level 5200m), 560km is located at ever-frozen ground to more than 900 kilometer of pipeline
Area, freezing period, is up to 8 months.Since lattice bracing wire ran from 1977, it is existing that frost heave, thaw collapse problem have resulted in repeatedly " dew pipe "
As.
China-Russia Crude Oil Pipeline North gets Mo River initial station Sino-Russian Heilungkiang boundary line, south to grand celebration terminal, more than 960 kilometer of total length,
By way of counties and districts of 12, five city of two provinces, pass through 440 kilometers of virgin forests, 11 big-and-middle-sized rivers, 5 nature reserve areas.Pipeline
Physical features north along the line is high southern low, and northern hypsography is larger, is the low mountain in Daxing'an Mountainrange, hills and river valley geomorgy along the line, and south is loose
Tender Plain, landform is flat open；Mo River-Jagdaqi section about 460km is mountain area, forest zone, Permafrost Area, ever-frozen ground overall length
Degree about 314km, wherein ice, many ice ever-frozen ground 209km less, full ice, rich ice ever-frozen ground 62km, frozen soil marsh 43km.Pipeline
It is faced with serious frozen swell and melt settlement disaster threat.
The frozen swell and melt settlement problem facing for pipeline, domestic and international unit of operation takes positive counter-measure.Luo Man well
After pipeline is gone into operation for 1985, the daily monitoring plan of pipeline is being implemented always as the important component part of project operation, except weekly
Outside Aircraft Air line walking once, also it is mounted with substantial amounts of instrumentation along the line to record service data in pipeline, and annual 9
Month, that is, pipe sedimentation carry out when maximum an on-site land survey with complete pipeline on-site inspection along the line, the record of instrument data and
The work such as the site assessment in landslide location.After 1989, Luo Man well conduit is carried out in annual using in-pipeline detector
Detection, to assess unstable soil body motion and the influence degree to pipeline for the diversity thaw collapse, with the continuous accumulation of detection data
And expansion, it is that the assessment of pipe technology performance provides good basis.Norman wells pipeline be first be embedded in plus
Put on airs the oil and gas pipes of northern Permafrost Area, be responsible for and runed by Jia Na enbridge company, in various regulations regulations
Requirement under, established that plan is careful, the monitoring system of strong operability, including in the monitoring of frozen soil thaw collapse, pipeline
The content of seven aspects such as detection, warpage arch detection, wrinkle detection, slope test, the detection of wood flour layer status and temperature monitoring.
Gubbs criterion is also by the change of the monitoring frozen soil such as regular line walking, installation pressure, temperature sensor.
Although domestic Outer Tube unit of operation takes the frozen swell and melt settlement disaster that permafrost region is tackled in positive measure, by
Extremely complex in the formation mechenism of frozen swell and melt settlement disaster, and the frozen soil characteristic of different regions is different, at present both at home and abroad simultaneously
There are no the monitoring technology of maturation, the impact to pipeline for the frozen swell and melt settlement disaster can be monitored.
Content of the invention
The purpose of the present invention be invent a kind of high accuracy, high stability, low cost based on fiber grating sensing technology
Permafrost region oil and gas pipes environment temperature monitoring system.
The present invention proposes a kind of permafrost region oil and gas pipes environment temperature monitoring system based on fiber grating sensing technology.
System adopts fiber grating sensing technology, to frozen soil and its under the influence of oil and gas pipes be monitored, and construct monitoring system,
Achieve the real-time automatic collecting of data, remote transmission and automatically analyze.
Permafrost region oil and gas pipes environment temperature monitoring system based on fiber grating sensing technology proposed by the present invention, frozen soil
Area's temperature monitoring adopts fiber-optical grating temperature sensor real time on-line monitoring.
This permafrost region oil and gas pipes environment temperature monitoring system is as shown in figure 1, this system is divided into on-site data gathering to transmit
Subsystem data analyzes display subsystem, specifically include fiber-optical grating temperature sensor group, field monitoring station, in remote monitoring
The heart.
The overall composition of permafrost region oil and gas pipes environment temperature monitoring system is as shown in Figure 1.Oil and gas pipes in permafrost region 1
2 surfaces and install about multiple fiber-optical grating temperature sensor a3, fiber-optical grating temperature sensor b4, optical fiber grating temperature pass
The temperature sensor group of sensor c5 composition, all the sensors series welding, then guide in monitoring station by optical cable 12, optical cable 12
It 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 of slave computer 15 is transmitted to low-orbit satellite 17 by satellite communication module 16, and low-orbit satellite 17 receives
Satellite communication module 18 is forwarded the data to, the data transfer receiving is entered by satellite communication module 18 to host computer 19 after data
Row analysis and process, thus realize the safety monitoring to permafrost region oil and gas pipes.
Multiple fiber-optical grating temperature sensor a3, fiber-optical grating temperature sensor b4, fiber-optical grating temperature sensor c5 divide
The temperature signal of pipeline is not passed to photoswitch 13 through optical cable 12, reach slave computer through fiber Bragg grating (FBG) demodulator 14 demodulation
15, slave computer 15 calls self-editing program, controls photoswitch 13 and fiber Bragg grating (FBG) demodulator 14, realizes collection the logarithm of data
According to carrying out pretreatment；Pretreated data is transmitted to low-orbit satellite 17, low-orbit satellite 17 by satellite communication module 16
Satellite communication module 18 is forwarded the data to, satellite communication module 18 is by the data transfer receiving to upper after receiving data
Machine 19 is analyzed and processes, and judges the safe condition of permafrost region pipeline.The process of data is mainly completed by software, software flow
As shown in Figure 3.The optical wavelength data that fiber Bragg grating (FBG) demodulator is mainly gathered by slave computer data prediction is according to being converted into temperature
Degrees of data, host computer after receiving the data, sorts data into first, draws out the trendgram of pipeline temperature, and the most at last
Three Monitoring Data merge, and judge the steady statue of permafrost region and the safe condition of pipeline.
The theory diagram of permafrost region oil and gas pipes environment temperature monitoring system is as shown in figure 3, it is divided into on-site data gathering
Transmission subsystem data analyzes display subsystem.The composition of on-site data gathering transmission subsystem is: optical fiber grating temperature passes
The output of sensor connects the input of photoswitch, and the output of photoswitch connects the input of fiber Bragg grating (FBG) demodulator, and fiber Bragg grating (FBG) demodulator is defeated
Go out to connect the input of slave computer, slave computer output connects satellite communication module.On-site data gathering transmission subsystem is defended by low orbit
Star is linked with data analysiss display subsystem.The composition of data analysiss display subsystem is: satellite communication module output connects position
The input of machine, host computer output has permafrost region temperature field Dynamic Announce.
The electric principle of this system is as shown in figure 4, the fc joint fc with photoswitch respectively of fiber-optical grating temperature sensor group
Input port 1, fc input port 2, fc input port 3 connect, and the r232 port of photoswitch connects the r232 port 1 of slave computer, light
The fc output port of switch connects the fc input port of fiber Bragg grating (FBG) demodulator, and the lan port of fiber Bragg grating (FBG) demodulator connects slave computer
Lan port, the vga of slave computer is connected with the vga of display, and the r232 port 2 of slave computer meets the r232 of satellite communication module
Port, satellite communication module transfers data to low-orbit satellite, and low-orbit satellite forwards the data to another satellite in real time and leads to
Letter module, this satellite communication module by receiving data by r232 port transmission to host computer r232 port, host computer is to data
Exported to display by vga port after analyzing and processing.
Fiber grating biography temperature sensor signal turns on one by one through photoswitch 13 and transmits to fiber Bragg grating (FBG) demodulator 14, optical fiber light
The centre wavelength that grid (FBG) demodulator 14 demodulates each fiber-optic grating sensor was transmitted to slave computer 15, the week of photoswitch 13 Continuity signal
Phase is controlled by slave computer 15.Slave computer 15 carries out pretreatment to data, and the data after processing is defeated by satellite communication module 16,
Satellite communication module 16 transfers data to low-orbit satellite 17, and low-orbit satellite 17 forwards the data to satellite communication mould in real time
Block 18, satellite communication module 18 transmits receiving data to host computer, and host computer is analyzed to data locating by self-programmed software
Reason, is shown by display.
Fiber-optical grating temperature sensor is voluntarily to develop sensor.Fiber-optical grating temperature sensor adopts the knot of double-layer pipe
Structure, not only increases the sensitivity of sensor, and also plays protective effect.
Except foregoing circuit partly in addition to, the fiber-optical grating temperature sensor of permafrost region oil and gas pipes environment temperature monitoring system
The composition of group is:
The composition of permafrost region fiber-optical grating temperature sensor group is as shown in Figure 3: in pipeline c28 up and down, pacifies respectively
Dress fiber-optical grating temperature sensor group a29, fiber-optical grating temperature sensor group b30, fiber-optical grating temperature sensor group c31, light
Fine grating temperature sensor group d32.Temperature sensor group 29 is made up of several fiber-optical grating temperature sensors 33, fiber grating
The quantity of temperature sensor 33 and interval can be arranged according to demand.Pass through between temperature sensor group 30 and temperature sensor group 32
Single armored optical cable 34 connects.Fiber-optical grating temperature sensor group a29, fiber-optical grating temperature sensor group b30, fiber grating temperature
Degree sensor group c31, fiber-optical grating temperature sensor group d32 are connected with data acquisition unit by cable junction box 35, realize
The monitoring of pipeline temperature.
The advantage of the system shows:
(1) propose to permafrost region and its under the influence of oil and gas pipes carry out the system of combined monitoring, disclose under frozen soil effect
The feature that body stress characteristic and body and frozen soil interact；Carry out the safety of oil and gas pipes under the influence of frozen soil with multi objective
Early warning；
(2) fiber grating sensing technology is applied to permafrost region Monitoring Pinpelines, this technology is anti-interference, corrosion-resistant, be easy to group
Net etc. is with the obvious advantage；This technology is easily achieved automatic real time on-line monitoring, and cost is relatively low；
(3) permafrost region temperature monitoring, monitors permafrost region temperature using fiber-optical grating temperature sensor, because fiber grating passes
Sense technology has the advantage of wavelength-division multiplex, an optical fiber can be connected multiple fiber-optical grating temperature sensors, it is to avoid complicated walking
Line, also saves cost simultaneously.
Brief description
Fig. 1 adopts permafrost region oil and gas pipes monitoring principle figure
Fig. 2 permafrost region pipe temperature 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
Wherein 1- permafrost region 2- pipeline a
3- fiber-optical grating temperature sensor a 4- fiber-optical grating temperature sensor b
5- fiber-optical grating temperature sensor c 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 28- pipeline c
29- fiber-optical grating temperature sensor group a 30- fiber-optical grating temperature sensor group b
31- fiber-optical grating temperature sensor group c 32- fiber-optical grating temperature sensor group d
33- fiber-optical grating temperature sensor d 34- single armored optical cable a
35- cable junction box b
Specific embodiment
Embodiment. this example is a kind of pilot system, and is that rich ice is satisfied the jelly of ice in frost zone thickness 2m, frozen ground types
Tu Qu is tested, wherein buried depth of pipeline 2m, and pipe diameter is 813mm, wall thickness is 10mm, grade of steel x65.
The overall composition of permafrost region oil and gas pipes monitoring system is as shown in figure 1, theory diagram is as shown in Figure 3.In permafrost region 1
Oil and gas pipes 2 surface and about install fiber-optical grating temperature sensor 3,4,5 composition temperature sensor group, all sensings
Device series welding, then guides in monitoring station by optical cable 12, optical cable 12 is connected with photoswitch 13, photoswitch 13 and fiber grating
(FBG) demodulator 14 connects, and fiber Bragg grating (FBG) demodulator 14 is connected with slave computer 15, and the pretreated data of slave computer 15 is passed through satellite and led to
Letter module 16 is transmitted to low-orbit satellite 17, and low-orbit satellite 17 forwards the data to satellite communication module after receiving data
18, the data transfer receiving is analyzed to host computer 19 and processes by satellite communication module 18, thus realizing to permafrost region
The safety monitoring of oil and gas pipes.
This electric principle is as shown in figure 4, the fc joint of fiber-optical grating temperature sensor group is defeated with the fc of photoswitch respectively
Inbound port 1, fc input port 2, fc input port 3 connect, and the r232 port of photoswitch connects the r232 port 1 of slave computer, and light is opened
The fc output port closing connects the fc input port of fiber Bragg grating (FBG) demodulator, and the lan port of fiber Bragg grating (FBG) demodulator connects slave computer
Lan port, the vga of slave computer is connected with the vga of display, and the r232 port 2 of slave computer connects the r232 end of satellite communication module
Mouthful, satellite communication module transfers data to low-orbit satellite, and low-orbit satellite forwards the data to another satellite communication in real time
Module, this satellite communication module by receiving data by r232 port transmission to host computer r232 port, host computer divides to data
Analysis is exported to display by vga port after processing.
Fiber-optical grating temperature sensor signal turns on one by one through photoswitch 13 and transmits to fiber Bragg grating (FBG) demodulator 14, optical fiber light
The centre wavelength that grid (FBG) demodulator 14 demodulates each fiber-optic grating sensor was transmitted to slave computer 15, the week of photoswitch 13 Continuity signal
Phase is controlled by slave computer 15.Slave computer 15 carries out pretreatment to data, and the data after processing is defeated by satellite communication module 16,
Satellite communication module 16 transfers data to low-orbit satellite 17, and low-orbit satellite 17 forwards the data to satellite communication mould in real time
Block 18, satellite communication module 18 transmits receiving data to host computer, and host computer is analyzed to data locating by self-programmed software
Reason, is shown by display.
Wherein:
Fiber-optical grating temperature sensor: from the temperature sensor of designed, designed encapsulation；
Optical cable: science and technology gyta-12b1 in sky in selecting；
Photoswitch: from light grand science and technology sum-fsw；
Fiber Bragg grating (FBG) demodulator: select sm130；
Slave computer and program: from grinding magnificent ipc-610, program is self-editing；
Telecommunication satellite module: the st2500 of stellar company；
Host computer and program: from grinding magnificent ipc-610, program is self-editing；
Wherein:
The composition of permafrost region fiber-optical grating temperature sensor group is as shown in Figure 3.In pipeline 28 up and down, it is respectively mounted
Fiber-optical grating temperature sensor group a29, fiber-optical grating temperature sensor group b30, fiber-optical grating temperature sensor group c31, optical fiber
Grating temperature sensor group d32.Temperature sensor group 29 is made up of several fiber-optical grating temperature sensors 33, fiber grating temperature
The quantity of degree sensor 33 and interval can be arranged according to demand.Pass through single between temperature sensor group 30 and temperature sensor group 32
Core armored optical cable 34 connects.Fiber-optical grating temperature sensor group a29, fiber-optical grating temperature sensor group b30, optical fiber grating temperature
Sensor group c31, fiber-optical grating temperature sensor group d32 are connected with data acquisition unit by cable junction box 35, realize pipe
The monitoring of road environment temperature.
When being monitored, temperature needs long term monitoring to the system, according to the analysis to long term monitoring data, total junction temperature
With moisture variable condition and trend, judge for pipe and soil interaction comprehensive analysis and pipeline potential risk.
Monitor through long, this example is easy to build monitoring system, it is easy to accomplish permafrost region and pipeline combined monitoring data
Real-time automatic collecting analysis and long-range issue, remotely automatic alarm in real time.Avoid loaded down with trivial details artificial gathered data, improve
The precision of early warning, decreases time of fire alarming, warning place can also be accurately positioned, this adopts to pipeline emergency measure simultaneously
Take most important.
Claims (4)
1. a kind of permafrost region oil and gas pipes environment temperature monitoring system, is characterized in that this system is divided into on-site data gathering transmission
System data analyzes display subsystem, specifically include fiber-optical grating temperature sensor group, field monitoring station, in remote monitoring
The heart；
Totally being configured to of permafrost region oil and gas pipes environment temperature monitoring system: permafrost region (1) oil and gas pipes (2) surface and
Fiber-optical grating temperature sensor group is installed about, fiber-optical grating temperature sensor group is connected with optical cable (12), then passes through light
Cable (12) is guided in field monitoring station, and optical cable (12) is connected with photoswitch (13), photoswitch (13) and fiber Bragg grating (FBG) demodulator
(14) connect, fiber Bragg grating (FBG) demodulator (14) is connected with slave computer (15), the pretreated data of slave computer (15) passes through first
Satellite communication module (16) transmits to low-orbit satellite (17), and low-orbit satellite (17) forwards the data to after receiving data
Two satellite communication modules (18), the data transfer receiving to host computer (19) is analyzed by the second satellite communication module (18)
And process, thus realize the safety monitoring to permafrost region oil and gas pipes；Fiber-optical grating temperature sensor group is all by oil and gas pipes (2)
The temperature signal enclosing passes to photoswitch (13) through optical cable (12), reaches slave computer (15) through fiber Bragg grating (FBG) demodulator (14) demodulation,
Slave computer (15) controls photoswitch (13) and fiber Bragg grating (FBG) demodulator (14) that data is acquired, and slave computer (15) enters to data
Row pretreatment；Pretreated data is transmitted to low-orbit satellite (17) by the first satellite communication module (16), and low orbit is defended
Star (17) forwards the data to the second satellite communication module (18) after receiving data, the second satellite communication module (18) will receive
To data transfer be analyzed to host computer (19) and process, judge the safe condition of permafrost region pipeline；
Described fiber-optical grating temperature sensor group includes the first fiber-optical grating temperature sensor group (29), the second optical fiber grating temperature
Sensor group (30), the 3rd fiber-optical grating temperature sensor group (31) and the 4th fiber-optical grating temperature sensor group (32)；First
Fiber-optical grating temperature sensor group (29), the second fiber-optical grating temperature sensor group (30), the 3rd fiber-optical grating temperature sensor
Group (31) and the 4th fiber-optical grating temperature sensor group (32) are made up of multiple fiber-optical grating temperature sensors (33) respectively, multiple
Fiber-optical grating temperature sensor (33) series welding, the quantity of fiber-optical grating temperature sensor (33) and interval set according to demand
Put；First fiber-optical grating temperature sensor group (29), the second fiber-optical grating temperature sensor group (30), the 3rd optical fiber grating temperature
Pass through single armored optical cable (34) between sensor group (31) and the 4th fiber-optical grating temperature sensor group (32) to connect；First light
Fine grating temperature sensor group (29), the second fiber-optical grating temperature sensor group (30), the 3rd fiber-optical grating temperature sensor group
(31), the 4th fiber-optical grating temperature sensor group (32) is connected with data acquisition unit by cable junction box (35).
2. a kind of permafrost region oil and gas pipes environment temperature monitoring system according to claim 1, is characterized in that its principle frame
Figure is: it is divided into on-site data gathering transmission subsystem data analysis display subsystem；On-site data gathering transmission subsystem
Composition be: the output of multiple fiber-optical grating temperature sensor groups connects the input of photoswitch, and the output of photoswitch connects fiber grating
The input of (FBG) demodulator, the output of fiber Bragg grating (FBG) demodulator connects the input of slave computer, and the output of slave computer connects the first satellite communication mould
Block；On-site data gathering transmission subsystem is connected with data analysiss display subsystem by low-orbit satellite；Data analysiss show
The composition of subsystem is: the output of the second satellite communication module connects the input of host computer, and the output of host computer includes permafrost region
Temperature field Dynamic Announce.
3. a kind of permafrost region oil and gas pipes environment temperature monitoring system according to claim 1 and 2, is characterized in that this system
Electric principle be: the fc joint of fiber-optical grating temperature sensor group is connected with the fc input port of photoswitch, the r232 of photoswitch
Port connects a r232 port of slave computer, and the fc output port of photoswitch connects the fc input port of fiber Bragg grating (FBG) demodulator, light
The lan port of fine grating demodulation instrument connects the lan port of slave computer, and the vga of slave computer is connected with the vga of the first display, the next
2nd r232 port of machine connects the r232 port of the first satellite communication module, and the first satellite communication module transfers data to low rail
Road satellite, low-orbit satellite forwards the data to the second satellite communication module in real time, and the second satellite communication module is by receiving data
By the r232 port of r232 port transmission to host computer, the vga of host computer is connected with the vga of second display, host computer logarithm
Exported to second display by vga port according to after analyzing and processing；
Fiber-optical grating temperature sensor group by gather pipeline temperature signal turn on one by one through photoswitch (13) transmit to
Fiber Bragg grating (FBG) demodulator (14), the centre wavelength that fiber Bragg grating (FBG) demodulator (14) demodulates multiple fiber-optical grating temperature sensors passes
Transport to slave computer (15), the cycle of photoswitch (13) Continuity signal is controlled by slave computer (15)；Slave computer (15) is carried out to data
Pretreatment, and the data after processing is defeated by the first satellite communication module (16), data is passed by the first satellite communication module (16)
Defeated to low-orbit satellite (17), low-orbit satellite (17) forwards the data to the second satellite communication module (18) in real time, and second defends
Star communication module (18) transmits receiving data to host computer (19), and host computer (19) is analyzed to data processing, by second
Display shows.
4. a kind of permafrost region oil and gas pipes environment temperature monitoring system according to claim 1 and 2, is characterized in that described light
Fine grating temperature sensor adopts the structure of double-layer pipe.
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