CN102346012A - Mining subsidence area oil gas pipeline pipe soil relative displacement monitoring method, system thereof, and system construction method - Google Patents
Mining subsidence area oil gas pipeline pipe soil relative displacement monitoring method, system thereof, and system construction method Download PDFInfo
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Abstract
The invention provides a mining subsidence area oil gas pipeline pipe soil relative displacement monitoring method, a system thereof, and a system construction method. A wavelength signal acquired by s sensor is subjected to demodulation and pretreatment at an on-site monitoring station, and is sent to a remote monitoring center through remote transmission; the monitoring center receives data, carries out further analysis processing on the data through a specific algorithm, and calculates mining subsidence area pipe soil relative displacement change; through dynamic display of the mining subsidence area pipe soil relative displacement change, state stabilization conditions of pipe body and soil strain change are subjected to determination to determine whether the data exceeds a threshold or not; an alarming condition of pipe soil relative displacement is that a monitoring value exceeds a preset value and maintains constant; when a property value is less than the threshold, it is shows that a pipeline is in a safe state; when a pipe soil relative displacement value reaches the threshold and maintains constant, an early warning of pipeline security is carried out.
Description
Technical field
The present invention is a kind of construction method of adopting sky subsidence area oil and gas pipes pipeclay relative displacement monitoring method and system and system based on fiber grating sensing technology, relates to measurement and the piping system technical field of measuring stress, the measurement of temperature, similar linear dimension.
Background technology
The underground ore bed space that is formed by the exploitation back is called the goaf.Underground ore bed its rock stratum, top loses support by after the exploitation, and equilibrium condition is destroyed, and produces crooked, slump thereupon, so that develops into the surface subsidence distortion, causes surface subsidence, forms lowland.Along with the continuous expansion in goaf, lowland constantly develops and forms and adopt the sky subsidence area, so on the ground or underground buildings or structures produce harm.Adopting the sky disaster of subsiding is to cause one of the principal mode of the geologic hazard of human life's property loss.Length can reach thousands of kilometers apart from oil transportation or gas pipe line fed distance, often will pass inevitably and adopt the sky subsidence area.Owing to the reasons such as further exploitation of the insufficient or underground ore body of route selection, might in movable collapse basin, pass through at the pipeline of adopting the sky subsidence area, thereby make the safe operation of pipeline suffer serious threat.
Build up global article one crude oil pipeline as far back as the U.S. in 1865 and rise, the world has promptly entered into the epoch of pipeline operation, and pipeline then constantly occurs through the goaf problem.Stipulated " the NCB method " of prediction pipeline in " engineering manual subsides " of coal council of Britain country in 1975 promulgation through the coal mine gob surface subsidence.1986; International pipeline research institute entrusts Battelle research institute to study with the method for preventing and treating passing through the stressed proterties of the pipeline of adopting the sky subsidence area, formed " the pipeline monitoring and the control in mining damage district " report (NG-18, No.155); This project system has been summed up and has been adopted the characteristic that sky subsides; Analyzed the harm of goaf, developed corresponding Stress calculation software, proposed subsidence area pipeline monitoring method pipeline.
Though China's pipeline cause is started late; But the pipeline industry of China be in flourish among; These pipelines are transported to the western abundant petroleum gas of China the east of China mostly, are stepping up construction and are planning that energy conveyance conduit has many thousands of kilometers pipelines such as transfering natural gas from the west to the east, middle remote pipeline, blue Zheng's long pipeline.These pipelines are through many mineral goaf or following mining area.As 8 mining areas of transfer natural gas from the west to the east a spool line approach Shanxi, Shandong, Shaanxi, 4 provinces and regions, Ningxia; Receive the influence in the part goaf of 76 pit minings formation; The about 887.494km of total length, the goaf will be in case formation will destroy face of land equilibrium condition; Cause face of land large tracts of land sinking, depression, crack or bring out secondary disasters such as landslide, avalanche, directly influence pipe safety; Shan crow natural gas line is adopted the sky subsidence area through 12 places on the way, and the about 12.6km of influenced total length constitutes significant threat to pipe safety production, and is wherein serious with reed Cao Gou subsidence area; Capital, Shan gas transmission line is by way of the shanxi coal mining area, and the long product pipeline Henan Section of blue Zheng, the big crude oil pipeline of iron etc. are also adopted disasters such as sky subsides easily.
In the face of numerous sky disasters of subsiding of adopting; Though the pipeline operator of China has been taked positive engineering protection measure; But also there is the drawback of some in these measures, at first are that cost is high, secondly are that protection works are not " putting things right once and for all " yet; The uncertain factor of design and construction is more, moreover cycle length and improvement that protection is administered are difficult for grasping opportunity.The monitoring then be a kind of efficiently, prophylactico-therapeutic measures cheaply.The international pipeline research institute of the U.S. (PRCI) will monitor pipeline and adopt the subside main mode of disaster of sky as control, and pipelines such as the transfering natural gas from the west to the east of China, capital, Shan line are gone into operation and then the goaf also effectively monitored.
Traditional goaf soil deformation adopts transit, spirit-leveling instrument, steel ruler, offset scale and methods such as total powerstation or GPS; The real-time of these methods is all relatively poor; All be that the face of land this existing phenomenon of having subsided is carried out result monitoring, be difficult to satisfy the requirement of goaf monitoring advanced prediction, long-term and real-time online.The monitoring of traditional pipeline strain is counted the master with electric resistance wire strain gauge, vibrating string type strain, and relatively poor aspect corrosion-resistant, anti-interference, stability also is difficult to meet the demands.The distributing optical fiber sensing technology (is representative with BOTDR) of rise in recent years is existing certain application aspect the body monitoring.
For adopting sky subsidence area oil and gas pipes, the relative displacement of the pipeline and the soil body is a very important factor.Along with the intensification of mining degree, the continuous sinking of adopting the sky subsidence area soil body is because the rigidity and the non-deformability of the body and the soil body are different; Body is no longer consistent with the distortion and the sinking displacement of its below soil body; The pipeline below soil body will continue to sink, and finally separate with pipeline, and the conduit upper soil body supported by body; Be attached on the pipeline, thereby cause pipeline secretly outstanding.A large amount of researchs show that when pipeline was secretly outstanding, pipeline received the load maximum, and body is in very unsettled load-bearing state, and this state badly influences the safety of pipeline.Therefore monitor the relative displacement between the pipeline and the soil body, understand the correspondence position relation of the pipeline and the soil body in real time,, have great significance for accurate judgement pipe safety state.
Fiber grating is a fiber optic passive device with the fastest developing speed in recent years.It is a kind of space periodicity index distribution of utilizing the light sensitive characteristic of fiber optic materials on the fibre core of optical fiber, to set up, its role is to change or control light in this regional dissemination mode.Except that have the anti-electromagnetic interference (EMI) of ordinary optic fibre, size is little, in light weight, intensity is high, the characteristics such as high temperature resistant, corrosion-resistant, fiber grating also has its unique characteristic: be easy to little with optically-coupled, coupling loss, be easy to wavelength-division multiplex etc.Thereby make fiber grating wide prospect arranged in fields such as optical-fibre communications and Fibre Optical Sensors.As a kind of emerging technology of photon research field, be that the sensing technology of pedestal sensor spare receives common concern in recent years with the fiber grating, the various countries researcher actively develops relevant research work.At present; The physical quantity that the fiber-optic grating sensor of having reported can be monitored has: temperature, strain, pressure, displacement, pressure, torsional angle, moment of torsion (twisting stress), acceleration, electric current, voltage, magnetic field, frequency, concentration, thermal expansivity, vibration etc., the practical application of wherein a part of fiber grating sensing system.
Fiber Bragg Grating FBG (Fiber Bragg Grating) be the most simply, the most general a kind of fiber grating.It is that one section refractive index is periodically variable optical fiber, and its index modulation degree of depth and grating cycle generally all are constants.The variation of temperature, strain can cause the cycle and the change of refractive of Fiber Bragg Grating FBG, thereby the reflectance spectrum of Fiber Bragg Grating FBG and transmission spectrum are changed.The variation of reflectance spectrum and transmission spectrum through the detection fiber Bragg grating just can obtain the information of corresponding temperature and strain, and Here it is measures the ultimate principle of temperature and strain with Fiber Bragg Grating FBG.
Can know that by coupled mode theory Fiber Bragg Grating FBG can be coupled to a guided mode that wherein transmits another guided mode that transmits in opposite direction and form narrowband reflection, peak reflectance wavelength (bragg wavelength) λ uniformly
BFor:
λ
B＝2n
effΛ (1)
In the formula: λ
BBe bragg wavelength; n
EffEffective refractive index for the spread fiber pattern; Λ is a grating pitch.
Can get the centre wavelength of grating and the relation of temperature and strain to formula (1) differential:
In the formula:
is the thermal expansivity of optical fiber;
is the thermo-optical coeffecient of fiber optic materials;
is the elasto-optical coefficient of fiber optic materials.Can know that by formula (2) strain is because the flexible and elasto-optical effect in Fiber Bragg Grating FBG cycle causes the variation of bragg wavelength, and temperature is because Fiber Bragg Grating FBG thermal expansion effects and thermo-optic effect cause the variation of bragg wavelength.
Fiber grating can be made into various senser elements, is used widely at sensory field.Compare with traditional electric transducer; Fiber-optic grating sensor has own unique advantage: (1) sensing head is simple in structure, volume is little, in light weight, shape variable; Be fit to imbed in the various large scale structures, but inner stress, strain and the structural damage etc. of measurement structure, stability, good reproducibility; (2) and have natural compatibility between the optical fiber, be prone to be connected with optical fiber, optical loss is low, spectral characteristic good, reliability is high; (3) have non-conducting, little to measured medium influence, have characteristics anticorrosive, anti-electromagnetic interference (EMI) again, be adapted at working in the rugged surroundings; (4) light and handy soft, can in an optical fiber, write a plurality of gratings, constitute sensor array, combine with wavelength-division multiplex and time division multiplex system, realize distributed sensing; (5) metrical information is with Wavelength-encoding, thereby fiber-optic grating sensor does not receive the influence of factors such as light-intensity variation, optical fiber connection and coupling loss, the optical polarization variation of light source, the antijamming capability that tool is stronger; (6) high sensitivity, high degree of resolution.
Compare with widely used Brillouin light domain reflectometer BOTDR, the advantage of fiber-optic grating sensor has: (1) can accurately locate measurement point, and resolution is high; (2) cost is low; (3) can process, encapsulate transducing part, make it be more suitable for on-the-spot rugged surroundings.
Because these advantages; In the Geotechnical Engineering field; Fiber-optic grating sensor is easy to imbed in the rock soil mass strain and the temperature to its inside and carries out high resolving power and large-range measuring; Technical advantage is very obvious, especially is embodied in to obtain long-term, reliable rock soil mass deformation data, does not also see the report that fiber grating sensing technology is used for goaf pipeclay relative displacement monitoring at present.
Summary of the invention
The objective of the invention is to invent that a kind of spatial resolution is high, cost is low, safely and effectively based on the construction method of adopting sky subsidence area oil and gas pipes pipeclay relative displacement monitoring method and system and system of fiber grating real-time online.
The present invention proposes a kind ofly adopts sky subsidence area oil and gas pipes pipeclay relative displacement monitoring and pre-alarming method and system and construction method thereof based on fiber grating sensing technology; Be to adopting the subside monitoring of pipeline laying band pipeclay relative displacement of sky, fiber-optic grating sensor real time on-line monitoring and early warning are adopted in the pipeclay relative displacement.Can realize real-time automatic collecting, remote transmission and the analysis automatically of data.
Along with the intensification of mining degree, because the rigidity and the non-deformability of the body and the soil body are different, along with adopting constantly staying of the sky subsidence area soil body; Body is no longer consistent with the distortion and the sinking displacement of its below soil body; The pipeline below soil body stays continuing, and finally separate with pipeline, and the conduit upper soil body is supported by body; Be attached on the pipeline, thereby cause pipeline secretly outstanding.A large amount of researchs show that when pipeline was secretly outstanding, pipeline received the load maximum, and body is in very unsettled load-bearing state, and this state badly influences the safety of pipeline.Therefore monitor the relative displacement between the pipeline and the soil body, can understand the correspondence position relation of the pipeline and the soil body in real time, when pipeclay relative displacement value reaches threshold value and keeps constant, show that pipeline is unsettled, and in time report to the police.
Based on fiber optic, light canopy sensing technology to adopt sky subsidence area oil and gas pipes pipeclay relative displacement monitoring method flow process as shown in Figure 1.The wavelength signals of sensor acquisition monitoring station at the scene is in harmonious proportion after the pre-service through separating; Arrived strange land monitoring center by remote transmission; After monitoring center receives data; Through special algorithm data are carried out further analyzing and processing, calculate the pipeclay relative displacement and change, thereby the in stable condition situation of body and soil body strain variation is judged; The alert if of pipeclay relative displacement is that monitor value surpasses preset value and keeps constant.When this parameter shows that then pipeline is in a safe condition during less than threshold value., pipeclay relative displacement value carries out pipe safety prewarning when reaching threshold value and keep constant.
The formation of used monitoring system is as shown in Figure 2; The mounting pipe soil phase is to displacement transducer a3 on the monitoring cross section of the oil and gas pipes a2 that adopts sky subsidence area 1; Be connected with the optical cable a5 that causes the monitoring station through optical Fiber Closure a4 then; In the monitoring station, optical cable a 5 is connected with photoswitch 6, and photoswitch 6 is connected with fiber Bragg grating (FBG) demodulator 7; Fiber Bragg grating (FBG) demodulator 7 is connected with slave computer 8, and slave computer 8 pretreated data receive host computer 11 through GPRS communication module a9 transmission, GPRS communication module b10.
The data flow of monitoring system is as shown in Figure 3, comprises three partial contents: the remote transmission program of the data acquisition program of slave computer, data, the DAP of host computer.Slave computer data acquisition major function is to accomplish the collection and the pre-service of data.The data of fiber-optic grating sensor are saved in slave computer through fiber Bragg grating (FBG) demodulator, and the slave computer data acquisition program need be classified to the data of preserving, and according to the optical fiber grating sensing characteristic wavelength change value is converted into corresponding strain value.The remote transmission program major function of data is to realize the data communication of upper and lower computer.Through the control to the GPRS communication module, the remote data transmission procedure is transferred to host computer with the preprocessed data of slave computer, and the Data Receiving situation of host computer is fed back to slave computer, has realized automatic transmission.The major function of host computer DAP is to handle accepting data through mathematical method, simulates the change curve of data, and result and alarm threshold value are compared, and then judge the security situation of goaf pipeline.
Pipeclay relative displacement transducer a3 passes to photoswitch 6 with the pipeclay relative displacement signal through optical cable a5; After (FBG) demodulator 7 demodulation reach slave computer 8; Slave computer 8 calls self-editing program, and control photoswitch 6 and fiber Bragg grating (FBG) demodulator 7 are realized the collection of data and data are carried out pre-service; Pretreated data receive host computer 11 through GPRS communication module a9 transmission, GPRS communication module b10, and 11 pairs of data of host computer are carried out further analyzing and processing, judge the pipeclay relative displacement; The processing of data is mainly accomplished by software, and software flow is as shown in Figure 3.The pre-service of slave computer data mainly is with the data based strain data that is converted into of the optical wavelength of fiber Bragg grating (FBG) demodulator collection; Host computer is after receiving data; At first with data qualification; To displacement and corresponding ess-strain, and finally judge the steady state (SS) in goaf and the safety case of pipeline according to the pipeclay relative displacement formula computer tube soil phase.
The fiber grating displacement sensor that pipeclay relative displacement monitoring method adopts be on the monitoring cross section of the oil and gas pipes b17 that adopts sky subsidence area 1 the mounting pipe soil phase to displacement transducer b16; Through optical Fiber Closure b19 and optical cable the pipeclay relative displacement signal is caused monitoring station photoswitch 6 and fiber Bragg grating (FBG) demodulator 7; Reach slave computer 8 after fiber Bragg grating (FBG) demodulator 7 demodulation, slave computer 8 pretreated data receive through GPRS communication module a9 transmission, GPRS communication module b10 and pass to the further analysis of host computer 11 dos and handle and give the demonstration (see figure 5).
Its monitoring principle is following:
Displacement transducer among Fig. 4 is imbedded in the soil with body, the power σ that this moment, displacement transducer load-bearing plate 15 tops received
1For coiling soil body gravity stress and transmitting the body deadweight and go up earthing body pressure G, that is: through dynamometer link 14
σ
1＝γ
sh+G (3)
In the formula, γ
sFor the soil body unit weight that subsides, h are the length of dynamometer link.
Dish is soil body bearing stress σ down
2For:
σ
2＝γ
sh+G-kγ
sh (4)
In the formula, k is that the soil body stays coefficient, 0≤k≤1.
The stress σ at this moment of fiber grating 13 places
3For:
σ
3＝σ
1-σ
2 (5)
Therefore, body relative displacement value Δ l is:
Δl＝σ
3h/E (6)
In the formula, E is the elastic modulus of dynamometer link material.
When the goaf soil body does not subside as yet, be in dynamic balance state σ
1=σ
2(being that the soil body stays coefficient k=0), σ at this moment
3=0.
When the goaf soil body began to subside, the support soil body depression gradually under the load-bearing plate 15 caused dish soil body bearing stress σ down
2Decay gradually from equilibrium state, until being 0 o'clock, body deadweight this moment and go up the earthing body pressure G disconnected soil body that do not subsided and balanced.So:
σ
3＝kγ
sh (7)
At this moment, the strain stress measured of fiber grating 13
PFor:
ε
P＝kγ
sh/E (8)
Therefore, can know, as the ε that measures by last analysis
P=γ
sH/E (being that the soil body stays coefficient k=1) and when keeping constant, the expression body is in vacant state.
The measurement mechanism of pipeclay relative displacement monitoring device is as shown in Figure 6, when measuring strain stress
PWhen reaching threshold value and keeping constant, show that promptly body has been in vacant state.
The overall formation of adopting sky subsidence area oil and gas pipes pipeclay relative displacement monitoring system is as shown in Figure 2.The mounting pipe soil phase is to displacement transducer a3 on the monitoring cross section of the oil and gas pipes a2 that adopts sky subsidence area 1; Be connected with the optical cable a5 that causes the monitoring station through optical Fiber Closure a4 then, in the monitoring station, optical cable a5 is connected with photoswitch 6; Photoswitch 6 is connected with fiber Bragg grating (FBG) demodulator 7; Fiber Bragg grating (FBG) demodulator 7 is connected with slave computer 8, and slave computer 8 pretreated data are through GPRS communication module a9 transmission, and GPRS communication module b10 passes to host computer 11 after receiving.
The concrete body of adopting sky subsidence area oil and gas pipes pipeclay relative displacement monitoring system constitutes as shown in Figure 7, and this system is divided into on-site data gathering transmission system and long-range receiving and analyzing system.
The on-site data gathering transmission system comprises fiber grating displacement sensor, photoswitch, fiber Bragg grating (FBG) demodulator, slave computer, GPRS communication module; Fiber grating displacement sensor output connects the input of photoswitch; The output of photoswitch connects the input of fiber Bragg grating (FBG) demodulator; The output of fiber Bragg grating (FBG) demodulator connects the input of slave computer, and the output of slave computer connects the GPRS communication module.
Long-range receiving and analyzing system comprises that GPRS communication module, host computer, the reception of data-signal remote live, data signal analysis and processing, change curve dynamically show; The output of GPRS communication module connects the input of host computer, and the output of host computer connects the dynamically input of demonstration of the reception of data-signal remote live, data signal analysis and processing, change curve respectively.
Pipeclay relative displacement transducer a3 passes to photoswitch 6 with the pipeclay relative displacement signal through optical cable a5; After fiber Bragg grating (FBG) demodulator 7 demodulation reach slave computer 8; Slave computer 8 calls self-editing program, and control photoswitch 6 and fiber Bragg grating (FBG) demodulator 7 are realized the collection of data and data are carried out pre-service; Pretreated data receive through GPRS communication module a9 transmission, GPRS communication module b10 and pass to host computer 11, and 11 pairs of data of host computer are carried out further analyzing and processing, judge the pipeclay relative displacement, judge the situation of subsiding of the goaf soil body.
The electric principle of this system is as shown in Figure 8; The PC joint of fiber grating displacement sensor a3 is connected with the PC joint of photoswitch 6 with optical cable a5; The R232 of photoswitch 6 connects the R232 interface of slave computer 8; The PC joint of photoswitch 6 connects the PC interface of fiber Bragg grating (FBG) demodulator 7SM125, and the LAN port of fiber Bragg grating (FBG) demodulator 7SM125 connects the LAN port of slave computer 8, and the output of slave computer 8 is by the VGA end of VGA termination display; The R232 port of slave computer 8 connects the R232 port of GPRS transport module a9 Siemens MC 35i; GPRS transport module a9 is received the R232 that is afterwards received host computer 11 by R232 through antenna GSM, GPRS network by GPRS receiver module b12 antenna GSM, and the output of host computer 11 is by the VGA end of VGA termination display.
The output signal of pipeclay relative displacement fiber-optic grating sensor transfers to fiber Bragg grating (FBG) demodulator 7 through photoswitch 6; The centre wavelength displacement that fiber Bragg grating (FBG) demodulator 7 demodulates fiber-optic grating sensor transfers to slave computer 8, and the cycle of photoswitch 6 Continuity signals is by slave computer 8 controls.8 pairs of data of slave computer are carried out pre-service; And the data after will handling are defeated by GPRS transport module a9; GPRS transport module a9 is transferred to the host computer 11 that is positioned at office with each monitoring variable that slave computer 8 calculates through public's cordless communication network; Host computer carries out analyzing and processing through self-programmed software to data, is shown by display.
The measurement mechanism of pipeclay relative displacement monitoring device is as shown in Figure 6, can pass through strain stress
PUnderstand the situation of pipeclay relative displacement; When measuring strain stress
PWhen reaching threshold value and keeping constant, show that body has been in vacant state;
The output signal of pipeclay relative displacement fiber-optic grating sensor transfers to fiber Bragg grating (FBG) demodulator 7 through the photoswitch conducting; The centre wavelength displacement that fiber Bragg grating (FBG) demodulator 7 demodulates each fiber-optic grating sensor transfers to slave computer 8, and the cycle of photoswitch 6 Continuity signals is by slave computer 8 controls.8 pairs of data of slave computer are carried out pre-service; And the data after will handling are defeated by GPRS transport module a9; GPRS transport module a9 is transferred to the host computer 11 that is positioned at office with each monitoring variable that slave computer 8 calculates through public's cordless communication network; Host computer carries out analyzing and processing through self-programmed software to data, is shown by display.
The field monitoring station is arranged on adopts near the valve chamber in sky subsidence area, comprises following a few part:
(1) optical Fiber Closure of monitoring station and each sensor be connected optical cable, be used for the sensor signal concentration of transmissions of adopting each position on the sky subsidence area to the monitoring station;
(2) photoswitch 6, and sky subsides and the sensor of pipeline is a lot of because monitoring is adopted, and signalling channel is numerous, can't once be connected on the fiber Bragg grating (FBG) demodulator 7, with photoswitch 6 each channel signal changed to fiber Bragg grating (FBG) demodulator 7 successively and analyzed;
(3) fiber Bragg grating (FBG) demodulator 7, are used to demodulate the centre wavelength displacement of each sensor;
(4) computing machine and program are used to control the frequency of (FBG) demodulator demodulation, and the centre wavelength displacement that (FBG) demodulator demodulates is calculated as each monitoring variable automatically, and these monitoring variables are sent to the GPRS communication module, and the signal that receives the GPRS communication module is controlled;
(5) GPRS communication module is used for each monitoring variable of COMPUTER CALCULATION is transferred to the server that is positioned at office through cordless communication network, also can accept the signal of server, sends to computing machine.
The principle of work of this system is: when adopting sky subsidence area 1 distortion, along with adopting constantly carrying out that sky subsides, the displacement between pipeline and its below soil body also changes, and measures through fiber grating displacement sensor a3.Through connecting optical cable a5; To photoswitch 6, photoswitch 6 changes each channel signal to fiber Bragg grating (FBG) demodulator 7 successively with the sensor signal concentration of transmissions of adopting each position, sky subsidence area, and fiber Bragg grating (FBG) demodulator 7 demodulates each sensor wavelength centre wavelength displacement and sensing is given slave computer 8; Slave computer 8 is calculated as each monitoring variable automatically with the centre wavelength displacement that (FBG) demodulator demodulates; And monitoring variable sent to on-the-spot GPRS communication module a9, GPRS communication module a9 is through the cordless communication network transmission signals, with GPRS communication module b10 transmission host computer 11; Host computer 11 provides warning with each monitoring variable and alarm threshold value contrast in the time of necessary.
Adopt the construction method of sky subsidence area oil and gas pipes pipeclay relative displacement monitoring system
The mounting pipe soil phase is connected with optical cable a5 through optical Fiber Closure a4 displacement transducer a3 then on the monitoring cross section of the oil and gas pipes a2 that adopts sky subsidence area 1, and optical cable a5 is connected to the monitoring station; In the monitoring station; Optical cable a5 is connected with photoswitch 6, and photoswitch 6 is connected with fiber Bragg grating (FBG) demodulator 7, and fiber Bragg grating (FBG) demodulator 7 is connected with slave computer 8; Slave computer 8 outputs meet GPRS communication module a9, and GPRS communication module b10 output connects host computer 11.
Wherein pipeclay relative displacement transducer a3 be installed in oil and gas pipes a2 under, the selection basis of monitoring sectional position and quantity is adopted the actual conditions of sky subsidence area 1 and is decided.Sensor welding series connection on each cross section is connected with optical cable a5 through optical Fiber Closure a4 then.
The construction method of pipeclay relative displacement biography monitoring device is as shown in Figure 5; Pipeclay relative displacement transducer b16 be installed in oil and gas pipes b17 under, the selection basis of monitoring sectional position and quantity is adopted the actual conditions of sky subsidence area 1 and is decided; In pipeline b17 bottom fiber grating displacement sensor b16 is installed; Fiber grating displacement sensor b16 is connected through fastener with pipeline b17; Fiber grating displacement sensor b16 can connect with strain transducer; Also can cause optical Fiber Closure b19 through optical patchcord 18 separately, be connected with optical cable through optical Fiber Closure b19; Wherein the structure of fiber grating displacement sensor a3 is as shown in Figure 4, and the fiber grating displacement sensor a3 that imbeds in the soil with body is made up of mounting blocks 12, fiber grating 13, dynamometer link 14, load-bearing plate 15; Mounting blocks 12 connects into " worker " font by dynamometer link 14 and load-bearing plate 15, and fiber grating 13 is fixed on the dynamometer link 14; Load-bearing plate 15 is used to bear and stays soil body gravity, and fiber grating 13 is measured the strain that dynamometer links 14 take place, and is converted into displacement through corresponding relation; Mounting blocks 12 is convenient to being installed on the pipeline of sensor-robust; Wherein dynamometer link 14 is threaded with mounting blocks 12 with load-bearing plate 15, dynamometer link 14, and mounting blocks 12 is connected through fastener with pipeline.
The advantage of this method and system:
(1) subside characteristic and body and the interactional characteristic of the soil body that subsides that pipeline laying band (piping lane band) is adopted the complicated soil body in sky subsidence area have been disclosed; Adopt the sky subsidence area influence safe early warning of oil and gas pipes down with pipeclay relative displacement monitoring index;
(2) fiber grating sensing technology is applied to adopt sky subsidence area 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 the remote auto real time on-line monitoring, and cost is lower;
(3) pipeclay relative displacement monitoring; Adopt the characteristic of sky subsidence area according to the pipeline place; Under each body monitoring cross section, 1 fiber grating displacement sensor is installed; Be used to the relative displacement situation of monitoring body and underliing the soil body; Judge the position that pipeclay relative displacement and body be whether unsettled and unsettled through the variation of monitor value, avoided distinguishing through the excavation pipe trench whether body is unsettled, carry out the selection on protection works opportunitys effective foundation is provided for adopting sky subsidence area oil and gas pipes; Reduced the blindness of protection works and practiced thrift pipeline operating cost, also guaranteed the security of operation of pipeline simultaneously, the construction when having reduced the excavation checking is dangerous;
(4) this method and system have automatically, continuously, characteristics timely; Can accurately and timely grasp the steady state (SS) of adopting the sky subsidence area soil body, body safe condition and secretly outstanding state whether, can strong foundation be provided improvement reinforcing of adopting the sky subsidence area and the science decision that pipe safety protects opportunity.
Description of drawings
Fig. 1 adopts sky subsidence area oil and gas pipes pipeclay relative displacement monitoring method process flow diagram
Fig. 2 adopts sky subsidence area oil and gas pipes pipeclay relative displacement monitoring system pie graph
Fig. 3 software flow pattern
Fig. 4 displacement transducer pie graph
Fig. 5 pipeclay relative displacement monitoring device figure
The measurement mechanism figure of Fig. 6 pipeclay relative displacement monitoring device
Fig. 7 adopts sky subsidence area oil and gas pipes Fundamentals of Supervisory Systems figure
Fig. 8 adopts sky subsidence area oil and gas pipes monitoring system electrical schematic diagram
Wherein 1-adopts the sky 2-pipeline a that subsides
3-pipeclay relative displacement transducer a 4-optical Fiber Closure a
5-optical cable a 6-photoswitch
7-fiber Bragg grating (FBG) demodulator 8-slave computer
9-GPRS communication module a 10-GPRS communication module b
11-host computer 12-mounting blocks
13-fiber grating 14-dynamometer link
15-load-bearing plate 16-pipeclay relative displacement transducer b
17-pipeline b 18-optical patchcord
19-optical Fiber Closure b
Embodiment
Embodiment. this example is an experimental technique and system, and it constitutes like Fig. 1-shown in Figure 8.One adopt adopt deeply that thickness rate is 10, exploitation length 15m, buried depth of pipeline 3m, duct length be that adopting on the sky subsidence area of 130m tested, pipe diameter is that 168mm, wall thickness are 6mm, grade of steel L245.
Based on fiber grating sensing technology to adopt sky subsidence area oil and gas pipes pipeclay relative displacement monitoring method flow process as shown in Figure 1.The wavelength signals of sensor acquisition monitoring station at the scene is in harmonious proportion after the pre-service through separating; Arrived strange land monitoring center by remote transmission; After monitoring center receives data; Through special algorithm data are carried out further analyzing and processing, calculate the pipeclay relative displacement and change, thereby the in stable condition situation of body and soil body strain variation is judged; The alert if of pipeclay relative displacement is that monitor value surpasses preset value and keeps constant.When this parameter shows that then pipeline is in a safe condition during less than threshold value., pipeclay relative displacement value carries out pipe safety prewarning when reaching threshold value and keep constant.
The data flow of monitoring system is as shown in Figure 3, comprises three partial contents: the remote transmission program of the data acquisition program of slave computer, data, the DAP of host computer.Slave computer data acquisition major function is to accomplish the collection and the pre-service of data.The data of fiber-optic grating sensor are saved in slave computer through fiber Bragg grating (FBG) demodulator, and the slave computer data acquisition program need be classified to the data of preserving, and according to the optical fiber grating sensing characteristic wavelength change value is converted into corresponding strain value.The remote transmission program major function of data is to realize the data communication of upper and lower computer.Through the control to the GPRS communication module, the remote data transmission procedure is transferred to host computer with the preprocessed data of slave computer, and the Data Receiving situation of host computer is fed back to slave computer, has realized automatic transmission.The major function of host computer DAP is to handle receiving data through mathematical method, simulates the change curve of data, and result and alarm threshold value are compared, and then judge the security situation of goaf pipeline.
Pipeclay relative displacement transducer a3 passes to photoswitch 6 with the pipeclay relative displacement signal through optical cable a5; Photoswitch 6 is after fiber Bragg grating (FBG) demodulator 7 demodulation reach slave computer 8; Slave computer 8 calls self-editing program; Control photoswitch 6 and fiber Bragg grating (FBG) demodulator 7 are realized the collection of data and data are carried out pre-service; Pretreated data receive host computer 11 through GPRS communication module a9 transmission, GPRS communication module b10, and 11 pairs of data of host computer are carried out further analyzing and processing, judge the pipeclay relative displacement; The processing of data is mainly accomplished by software, and software flow is as shown in Figure 3.The pre-service of slave computer data mainly is with the data based strain data that is converted into of the optical wavelength of fiber Bragg grating (FBG) demodulator collection; Host computer is after receiving data; At first with data qualification; To displacement and corresponding ess-strain, and finally judge the steady state (SS) in goaf and the safety case of pipeline according to the pipeclay relative displacement formula computer tube soil phase.
The overall formation of adopting sky subsidence area oil and gas pipes pipeclay relative displacement monitoring system is as shown in Figure 2.The mounting pipe soil phase is to displacement transducer a3 on the monitoring cross section of the oil and gas pipes a2 that adopts sky subsidence area 1; Be connected with the optical cable a5 that causes the monitoring station through optical Fiber Closure a4 then, in the monitoring station, optical cable a5 is connected with photoswitch 6; Photoswitch 6 is connected with fiber Bragg grating (FBG) demodulator 7; Fiber Bragg grating (FBG) demodulator 7 is connected with slave computer 8, and slave computer 8 pretreated data are through GPRS communication module a9 transmission, and GPRS communication module b10 passes to host computer 11 after receiving.
The concrete body of adopting sky subsidence area oil and gas pipes pipeclay relative displacement monitoring system constitutes as shown in Figure 7, and this system is divided into on-site data gathering transmission system and long-range receiving and analyzing system.
The on-site data gathering transmission system comprises fiber grating displacement sensor, photoswitch, fiber Bragg grating (FBG) demodulator, slave computer, GPRS communication module; Fiber grating displacement sensor output connects the input of photoswitch; The output of photoswitch connects the input of fiber Bragg grating (FBG) demodulator; The output of fiber Bragg grating (FBG) demodulator connects the input of slave computer, and the output of slave computer connects the GPRS communication module.
Long-range receiving and analyzing system comprises that GPRS communication module, host computer, the reception of data-signal remote live, data signal analysis and processing, change curve dynamically show; The output of GPRS communication module connects the input of host computer, and the output of host computer connects the dynamically input of demonstration of the reception of data-signal remote live, data signal analysis and processing, change curve respectively.
Pipeclay relative displacement transducer a3 passes to photoswitch 6 with the pipeclay relative displacement signal through optical cable a5; Photoswitch 6 is after fiber Bragg grating (FBG) demodulator 7 demodulation reach slave computer 8; Slave computer 8 calls self-editing program; Control photoswitch 6 and fiber Bragg grating (FBG) demodulator 7 are realized the collection of data and data are carried out pre-service; Pretreated data receive through GPRS communication module a9 transmission, GPRS communication module b10 and pass to host computer 11, and 11 pairs of data of host computer are carried out further analyzing and processing, judge the pipeclay relative displacement, and then judge the situation of subsiding of the goaf soil body.
The electric principle of this system is as shown in Figure 8; The PC joint of fiber grating displacement sensor a3 is connected with the PC joint of photoswitch 6 with optical cable a5; The R232 of photoswitch 6 connects the R232 interface of slave computer 8; The PC joint of photoswitch 6 connects the PC interface of fiber Bragg grating (FBG) demodulator 7SM125, and the LAN port of fiber Bragg grating (FBG) demodulator 7SM125 connects the LAN port of slave computer 8, and the output of slave computer 8 is by the VGA end of VGA termination display; The R232 port of slave computer 8 connects the R232 port of GPRS transport module a9 Siemens MC 35i; GPRS transport module a9 is received the R232 that is afterwards received host computer 11 by R232 through antenna GSM, GPRS network by GPRS receiver module b12 antenna GSM, and the output of host computer 11 is by the VGA end of VGA termination display.
The output signal of pipeclay relative displacement fiber-optic grating sensor transfers to fiber Bragg grating (FBG) demodulator 7 through photoswitch 6; The centre wavelength displacement that fiber Bragg grating (FBG) demodulator 7 demodulates fiber-optic grating sensor transfers to slave computer 8, and the cycle of photoswitch 6 Continuity signals is by slave computer 8 controls.8 pairs of data of slave computer are carried out pre-service; And the data after will handling are defeated by GPRS transport module a9; GPRS transport module a9 is transferred to the host computer 11 that is positioned at office with each monitoring variable that slave computer 8 calculates through public's cordless communication network; Host computer carries out analyzing and processing through self-programmed software to data, is shown by display.
The measurement mechanism of pipeclay relative displacement monitoring device is as shown in Figure 6, can pass through strain stress
PUnderstand the situation of pipeclay relative displacement; When measuring strain stress
PWhen reaching threshold value and keeping constant, and show that body has been in vacant state;
The output signal of pipeclay relative displacement fiber-optic grating sensor through photoswitch one by one conducting transfer to fiber Bragg grating (FBG) demodulator 7; The centre wavelength displacement that fiber Bragg grating (FBG) demodulator 7 demodulates each fiber-optic grating sensor transfers to slave computer 8, and the cycle of photoswitch 6 Continuity signals is by slave computer 8 controls.8 pairs of data of slave computer are carried out pre-service; And the data after will handling are defeated by GPRS transport module a9; GPRS transport module a9 is transferred to the host computer 11 that is positioned at office with each monitoring variable that slave computer 8 calculates through public's cordless communication network; Host computer carries out analyzing and processing through self-programmed software to data, is shown by display.
Adopt the construction method of sky subsidence area oil and gas pipes pipeclay relative displacement monitoring system
The mounting pipe soil phase is connected with optical cable a5 through optical Fiber Closure a4 displacement transducer a3 then on the monitoring cross section of the oil and gas pipes a2 that adopts sky subsidence area 1, and optical cable a5 is connected to the monitoring station; In the monitoring station; Optical cable a5 is connected with photoswitch 6, and photoswitch 6 is connected with fiber Bragg grating (FBG) demodulator 7, and fiber Bragg grating (FBG) demodulator 7 is connected with slave computer 8; Slave computer 8 outputs meet GPRS communication module a9, and GPRS communication module b10 output connects host computer 11.
Wherein pipeclay relative displacement transducer a3 be installed in oil and gas pipes a2 under, the selection basis of monitoring sectional position and quantity is adopted the actual conditions of sky subsidence area 1 and is decided.Sensor welding series connection on each cross section is connected with optical cable a5 through optical Fiber Closure a4 then.
The construction method of pipeclay relative displacement monitoring device is as shown in Figure 5; Pipeclay relative displacement transducer a3 be installed in oil and gas pipes a2 under, the selection basis of monitoring sectional position and quantity is adopted the actual conditions of sky subsidence area 1 and is decided; In pipeline c17 bottom fiber grating displacement sensor b16 is installed; Fiber grating displacement sensor b16 is connected through fastener with pipeline c17; Fiber grating displacement sensor b16 can connect with strain transducer; Also can cause optical Fiber Closure b19 through optical patchcord 18 separately, be connected with optical cable through optical Fiber Closure b19; Wherein the structure of fiber grating displacement sensor a3 is as shown in Figure 4, and the fiber grating displacement sensor a3 that imbeds in the soil with body is made up of mounting blocks 12, fiber grating 13, dynamometer link 14, load-bearing plate 15; Mounting blocks 12 connects into " worker " font by dynamometer link 14 and load-bearing plate 15, and fiber grating 13 is fixed on the dynamometer link 14; Load-bearing plate 15 is used to bear and stays soil body gravity, and fiber grating 13 is measured the strain that dynamometer links 14 take place, and is converted into displacement through corresponding relation; Mounting blocks 12 is convenient to being installed on the pipeline of sensor-robust; Wherein dynamometer link 14 is threaded with mounting blocks 12 with load-bearing plate 15, dynamometer link 14, and mounting blocks 12 is connected through fastener with pipeline.
The field monitoring station is arranged on adopts near the valve chamber in sky subsidence area, comprises following a few part:
(1) optical Fiber Closure of monitoring station and each sensor be connected optical cable, be used for the sensor signal concentration of transmissions of adopting each position on the sky subsidence area to the monitoring station;
(2) photoswitch 6, and sky subsides and the sensor of pipeline is a lot of because monitoring is adopted, and signalling channel is numerous, can't once be connected on the fiber Bragg grating (FBG) demodulator 7, with photoswitch 6 each channel signal changed to fiber Bragg grating (FBG) demodulator 7 successively and analyzed;
(3) fiber Bragg grating (FBG) demodulator 7, are used to demodulate the centre wavelength displacement of each sensor;
(4) computing machine and program are used to control the frequency of (FBG) demodulator demodulation, and the centre wavelength displacement that (FBG) demodulator demodulates is calculated as each monitoring variable automatically, and these monitoring variables are sent to the GPRS communication module, and the signal that receives the GPRS communication module is controlled;
(5) GPRS communication module is used for each monitoring variable of COMPUTER CALCULATION is transferred to the server that is positioned at office through cordless communication network, also can accept the signal of server, sends to computing machine.
Wherein:
Fiber grating displacement sensor: select the fiber-optic grating sensor of designing packaging voluntarily for use;
Photoswitch 6: select for use light to swell scientific and technological SUM-FSW;
Fiber Bragg grating (FBG) demodulator 7: select SM125 for use;
GPRS transport module a9: Siemens MC 35i;
GPRS receiver module b10: select Siemens MC 35i for use.
The system that makes up with said method is when monitoring, and the relative displacement of adopting between sky subsidence area 1 and the oil and gas pipes a2 is monitored by pipeclay relative displacement transducer a3;
The signal that collects is done pre-service by slave computer 8 after photoswitch 6, fiber Bragg grating (FBG) demodulator 7 demodulation;
11 pairs of signals of host computer are done further to analyze and handle;
Adopting sky subsidence area pipeclay relative displacement change dynamics by host computer 11 outputs shows; And whether judgment data exceeds threshold value;
When pipeclay relative displacement value shows that then pipeline is in a safe condition during less than threshold value;
, pipeclay relative displacement value carries out pipe safety prewarning when reaching threshold value and keep constant.
If adopting the soil body of sky subsidence area 1 stays; The pipeline a2 that is embedded in soil body below receives effect and the strain that bends of top soil body load; Because the pipeline a2 below soil body constantly subsides, and is embedded in the pipeclay relative displacement transducer a 3 that adopts sky subsidence area 1 and in bearing the process of soil pressure, produces tensile strain, the fiber grating 13 on the pipeclay relative displacement transducer a3 is experienced stretching strain; Can draw pipeclay relative displacement and strain through calculating, promptly to judge the position that pipeline a2 is whether unsettled and unsettled.
Through monitoring for a long time, this example is easy to make up monitoring system, is easy to realize adopting the real-time automatic collecting analysis and the long-range issue of sky subsidence area 1 and pipeline a2 Monitoring Data, and remote live is reported to the police automatically.Avoided loaded down with trivial details artificial image data, improved the precision of early warning, reduced time of fire alarming, can also accurately locate simultaneously place of alarm, this to the pipeline emergency measure take most important.
Claims (8)
1. adopt sky subsidence area oil and gas pipes pipeclay relative displacement monitoring method for one kind, it is characterized in that its monitoring method system for use in carrying:
The mounting pipe soil phase is to displacement transducer a (3) on the monitoring cross section of the oil and gas pipes a (2) that adopts sky subsidence area (1); Be connected with the optical cable a (5) that causes the monitoring station through optical Fiber Closure a (4) then; In the monitoring station; Optical cable a (5) is connected with photoswitch (6); Photoswitch (6) is connected with fiber Bragg grating (FBG) demodulator (7), and fiber Bragg grating (FBG) demodulator (7) is connected with slave computer (8), and the pretreated data of slave computer (8) receive host computer (11) through GPRS communication module a (9) transmission, GPRS communication module b (10); Monitor adopting sky subsidence area oil and gas pipes with said apparatus.
The monitoring flow process is successively:
The fiber grating displacement sensor monitoring is adopted in the pipeclay relative displacement;
The wavelength signals of sensor acquisition monitoring station at the scene is in harmonious proportion after the pre-service through separating, by remote transmission to strange land monitoring center;
After monitoring center receives data, data are carried out further analyzing and processing, calculate and adopt the pipeclay relative displacement variation of sky subsidence area through special algorithm;
Show through adopting sky subsidence area pipeclay relative displacement change dynamics, thereby the in stable condition situation of body and soil body strain variation is judged whether judgment data exceeds threshold value;
The alert if of pipeclay relative displacement is that monitor value surpasses preset value and keeps constant;
When pipeclay relative displacement value shows that then pipeline is in a safe condition during less than threshold value;
When pipeclay relative displacement value reaches threshold value and keeps constant or the soil body horizontal distortion curve sudden change occurs and carry out the early warning of pipe safety.
2. the sky subsidence area oil and gas pipes pipeclay relative displacement monitoring method of adopting according to claim 1 is characterized in that concrete grammar is:
Pipeclay relative displacement transducer a (3) passes to photoswitch (6) with body strain and pipeclay relative displacement signal through optical cable a (5); Photoswitch (6) is after fiber Bragg grating (FBG) demodulator (7) demodulation reaches slave computer (8); Slave computer (8) calls self-editing program; Control photoswitch (6) and fiber Bragg grating (FBG) demodulator (7) are realized the collection of data and data are carried out pre-service; Pretreated data receive host computer (11) through GPRS communication module a (9) transmission, GPRS communication module b (10), and host computer (11) carries out further analyzing and processing to data, judge the force and deformation state and the pipeclay relative displacement of pipeline; The processing of data is mainly accomplished by software; The pre-service of slave computer data mainly is with the data based strain data that is converted into of the optical wavelength of fiber Bragg grating (FBG) demodulator collection; Host computer is after receiving data; At first with data qualification; To displacement and corresponding ess-strain, and finally judge the steady state (SS) in goaf and the safety case of pipeline according to the pipeclay relative displacement formula computer tube soil phase; The strain stress that pipeclay relative displacement transducer a (3) measures
PFor:
ε
P＝kγ
sh/E
As the ε that measures
P=γ
sH/E, promptly the soil body stays coefficient k=1 and when keeping stablize, representes that body is in vacant state; In the formula, γ
sFor the soil body unit weight that subsides, h are that length, the k of dynamometer link is that the soil body stays coefficient, E is the elastic model of dynamometer link material.
3. system of adopting sky subsidence area oil and gas pipes pipeclay relative displacement monitoring method according to claim 1; It is characterized in that the mounting pipe soil phase is to displacement transducer a (3) on the monitoring cross section of the oil and gas pipes a (2) that adopts sky subsidence area 1; Be connected with the optical cable a (5) that causes the monitoring station through optical Fiber Closure a (4) then, in the monitoring station, optical cable a (5) is connected with photoswitch (6); Photoswitch (6) is connected with fiber Bragg grating (FBG) demodulator (7); Fiber Bragg grating (FBG) demodulator (7) is connected with slave computer (8), and the pretreated data of slave computer (8) are through GPRS communication module a (9) transmission, and GPRS communication module b (10) passes to host computer (11) after receiving.
The fiber-optic grating sensor output signal of pipeclay relative displacement transfers to fiber Bragg grating (FBG) demodulator (7) through the photoswitch conducting; The centre wavelength displacement that fiber Bragg grating (FBG) demodulator (7) demodulates each fiber-optic grating sensor transfers to slave computer (8), and the cycle of photoswitch (6) Continuity signal is controlled by slave computer (8).Slave computer (8) carries out pre-service to data; And the data after will handling are defeated by GPRS transport module a (19); GPRS transport module a (9) is transferred to the host computer (11) that is positioned at office with each monitoring variable that slave computer (8) calculates through public's cordless communication network; Host computer carries out analyzing and processing through self-programmed software to data, is shown by display.
4. the sky subsidence area oil and gas pipes pipeclay relative displacement monitoring system of adopting according to claim 3 is characterized in that this system is divided into on-site data gathering transmission system and long-range receiving and analyzing system;
The on-site data gathering transmission system comprises fiber grating displacement sensor, photoswitch, fiber Bragg grating (FBG) demodulator, slave computer, GPRS module; Fiber grating displacement sensor output connects the input of photoswitch respectively, and the output of photoswitch connects the input of fiber Bragg grating (FBG) demodulator, and the output of fiber Bragg grating (FBG) demodulator connects the input of slave computer, and the output of slave computer connects the GPRS module;
Long-range receiving and analyzing system comprises that GPRS module, host computer, the reception of data-signal remote live, data signal analysis and processing, change curve dynamically show; The output of GPRS module connects the input of host computer, and the output of host computer connects the dynamically input of demonstration of the reception of data-signal remote live, data signal analysis and processing, change curve respectively;
Pipeclay relative displacement transducer a (3) passes to photoswitch (6) with body strain and pipeclay relative displacement signal through optical cable a (5); Photoswitch (6) is after fiber Bragg grating (FBG) demodulator (7) demodulation reaches slave computer (8); Slave computer (8) calls self-editing program; Control photoswitch (6) and fiber Bragg grating (FBG) demodulator (7) are realized the collection of data and data are carried out pre-service; Pretreated data receive through GPRS communication module a (9) transmission, GPRS communication module b (10) and pass to host computer (11), and host computer (11) carries out further analyzing and processing to data, judges the force and deformation state and the pipeclay relative displacement of pipeline; Host computer (11) is judged the situation of subsiding of the safe condition and the goaf soil body of adopting sky subsidence area pipeline to the analysis result of the distortion and the pipeclay relative displacement of pipeline.
5. according to claim 3 or the 4 described sky subsidence area oil and gas pipes pipeclay relative displacement monitoring systems of adopting; The electric principle that it is characterized in that this system is: the PC joint of fiber grating displacement sensor a (3) is connected with the PC joint of photoswitch (6) with optical cable a (5); The R232 of photoswitch (6) connects the R232 interface of slave computer (8); The PC joint of photoswitch (6) connects the PC interface of fiber Bragg grating (FBG) demodulator (7) SM125; The LAN port of fiber Bragg grating (FBG) demodulator (7) SM125 connects the LAN port of slave computer (8); The output of slave computer (8) is by the VGA end of VGA termination display, and the R232 port of slave computer (8) connects the R232 port of GPRS transport module a (9) Siemens MC 35i, and GPRS transport module a (9) is through antenna GSM, GPRS network; Received the back by GPRS receiver module b (10) antenna GSM and receive the R232 of host computer (11) by R232, the output of host computer (11) is by the VGA end of VGA termination display;
The output signal of the fiber-optic grating sensor of pipeclay relative displacement transfers to fiber Bragg grating (FBG) demodulator (7) through photoswitch (6) conducting; The centre wavelength displacement that fiber Bragg grating (FBG) demodulator (7) demodulates each fiber-optic grating sensor transfers to slave computer (8), and the cycle of photoswitch (6) Continuity signal is controlled by slave computer (8); Slave computer (8) carries out pre-service to data; And the data after will handling are defeated by GPRS transport module a (9); GPRS transport module a (9) is transferred to the host computer (11) that is positioned at office with each monitoring variable that slave computer (8) calculates through public's cordless communication network; Host computer carries out analyzing and processing through self-programmed software to data, is shown by display.
6. according to claim 3 or the 4 described sky subsidence area oil and gas pipes pipeclay relative displacement monitoring systems of adopting; The formation that it is characterized in that said fiber grating displacement sensor a (3) is: in pipeline b (17) bottom fiber grating displacement sensor a (3) is installed; Fiber grating displacement sensor a (3) is connected through fastener with pipeline b (17); Fiber grating displacement sensor a (3) or connect with strain transducer; Or cause optical Fiber Closure b (19) through optical patchcord (18) separately, be connected with optical cable through optical Fiber Closure b (19);
Said fiber grating displacement sensor a (3) is made up of mounting blocks (12), fiber grating (13), dynamometer link (14), load-bearing plate (25); Mounting blocks (12) connects into " worker " font by dynamometer link (14) and load-bearing plate (15), and fiber grating (13) is fixed on the dynamometer link (14); Load-bearing plate (15) is used to bear and stays soil body gravity, and fiber grating (13) is measured the strain that dynamometer link (14) takes place, and is converted into displacement through corresponding relation; Mounting blocks (12) is convenient to being installed on the pipeline of sensor-robust; Wherein dynamometer link (14) is threaded with mounting blocks (12) with load-bearing plate (15), dynamometer link (14), and mounting blocks (12) is connected through fastener with pipeline.
7. construction method of adopting sky subsidence area oil and gas pipes pipeclay relative displacement monitoring system as claimed in claim 3; It is characterized in that the mounting pipe soil phase is connected with optical cable a (5) through optical Fiber Closure a (4) displacement transducer a (3) then on the monitoring cross section of the oil and gas pipes a (2) that adopts sky subsidence area (1), optical cable a (5) is connected to the monitoring station; In the monitoring station; Optical cable a (5) is connected with photoswitch (6), and photoswitch (6) is connected with fiber Bragg grating (FBG) demodulator (7), and fiber Bragg grating (FBG) demodulator (7) is connected with slave computer (8); Slave computer (8) output meets GPRS communication module a (9), and GPRS communication module b (10) output connects host computer (11).
8. the construction method of adopting sky subsidence area oil and gas pipes pipeclay relative displacement monitoring system according to claim 7, it is characterized in that said pipeclay relative displacement transducer a (3) be installed in oil and gas pipes a (2) under; In pipeline b (17) bottom fiber grating displacement sensor a (3) is installed; Fiber grating displacement sensor a (3) is connected through fastener with pipeline b (17); Fiber grating displacement sensor a (3) causes optical Fiber Closure b (19) through optical patchcord (18), is connected with optical cable through optical Fiber Closure b (19); The fiber grating displacement sensor a (3) that wherein imbeds in the soil with body is made up of mounting blocks (12), fiber grating (13), dynamometer link (14), load-bearing plate (15); Mounting blocks (12) connects into " worker " font by dynamometer link (14) and load-bearing plate (15), and fiber grating (13) is fixed on the dynamometer link (14); Mounting blocks (12) is installed on the pipeline; Wherein dynamometer link (14) is threaded with mounting blocks (12) with load-bearing plate (15), dynamometer link (14), and mounting blocks (12) is connected through fastener with pipeline.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345798A (en) * | 2010-07-28 | 2012-02-08 | 中国石油天然气股份有限公司 | System for monitoring pipe-soil relative displacement of oil-gas pipeline in mining subsidence area |
| CN102345795A (en) * | 2010-07-28 | 2012-02-08 | 中国石油天然气股份有限公司 | Method and system for monitoring pipe-soil relative displacement of oil-gas pipeline in mining subsidence area |
| CN103453844A (en) * | 2013-09-25 | 2013-12-18 | 天津亿利科能源科技发展股份有限公司 | Flexible pipeline deformation online monitoring method based on fiber bragg grating |
| CN108007333A (en) * | 2017-11-21 | 2018-05-08 | 中国矿业大学 | A kind of strata displacement monitoring device and monitoring method |
| CN115371737A (en) * | 2022-09-01 | 2022-11-22 | 国家石油天然气管网集团有限公司 | Method, device and controller for monitoring pipe-soil coupling effect |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000058716A1 (en) * | 1999-03-26 | 2000-10-05 | Speedfam-Ipec Corporation | Optical endpoint detection system for rotational chemical mechanical polishing |
| CN201293693Y (en) * | 2008-09-03 | 2009-08-19 | 中国石油天然气股份有限公司 | Device for monitoring landslide interior conduit stress based on optical fiber and grating |
| CN102345795A (en) * | 2010-07-28 | 2012-02-08 | 中国石油天然气股份有限公司 | Method and system for monitoring pipe-soil relative displacement of oil-gas pipeline in mining subsidence area |
| CN102345798A (en) * | 2010-07-28 | 2012-02-08 | 中国石油天然气股份有限公司 | System for monitoring pipe-soil relative displacement of oil-gas pipeline in mining subsidence area |
-
2010
- 2010-07-28 CN CN 201010240014 patent/CN102346012B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000058716A1 (en) * | 1999-03-26 | 2000-10-05 | Speedfam-Ipec Corporation | Optical endpoint detection system for rotational chemical mechanical polishing |
| CN201293693Y (en) * | 2008-09-03 | 2009-08-19 | 中国石油天然气股份有限公司 | Device for monitoring landslide interior conduit stress based on optical fiber and grating |
| CN102345795A (en) * | 2010-07-28 | 2012-02-08 | 中国石油天然气股份有限公司 | Method and system for monitoring pipe-soil relative displacement of oil-gas pipeline in mining subsidence area |
| CN102345798A (en) * | 2010-07-28 | 2012-02-08 | 中国石油天然气股份有限公司 | System for monitoring pipe-soil relative displacement of oil-gas pipeline in mining subsidence area |
Non-Patent Citations (1)
| Title |
|---|
| 胡志新等: "《基于光纤光栅传感的管道滑坡监测方法研究》", 《光子学报》, vol. 39, no. 1, 31 January 2010 (2010-01-31), pages 33 - 36 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345798A (en) * | 2010-07-28 | 2012-02-08 | 中国石油天然气股份有限公司 | System for monitoring pipe-soil relative displacement of oil-gas pipeline in mining subsidence area |
| CN102345795A (en) * | 2010-07-28 | 2012-02-08 | 中国石油天然气股份有限公司 | Method and system for monitoring pipe-soil relative displacement of oil-gas pipeline in mining subsidence area |
| CN103453844A (en) * | 2013-09-25 | 2013-12-18 | 天津亿利科能源科技发展股份有限公司 | Flexible pipeline deformation online monitoring method based on fiber bragg grating |
| CN108007333A (en) * | 2017-11-21 | 2018-05-08 | 中国矿业大学 | A kind of strata displacement monitoring device and monitoring method |
| CN115371737A (en) * | 2022-09-01 | 2022-11-22 | 国家石油天然气管网集团有限公司 | Method, device and controller for monitoring pipe-soil coupling effect |
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| CN102346012B (en) | 2013-09-04 |
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Effective date of registration: 20211110 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 China Petroleum Building, No. 9, Dongzhimen North Street, Dongcheng District, Beijing Patentee before: China National Petroleum Corporation |