CN104454007B - A kind of coal mine safety prewarning system based on multicore fiber - Google Patents
A kind of coal mine safety prewarning system based on multicore fiber Download PDFInfo
- Publication number
- CN104454007B CN104454007B CN201410564044.7A CN201410564044A CN104454007B CN 104454007 B CN104454007 B CN 104454007B CN 201410564044 A CN201410564044 A CN 201410564044A CN 104454007 B CN104454007 B CN 104454007B
- Authority
- CN
- China
- Prior art keywords
- fiber
- multicore fiber
- fibre
- coal mine
- multicore
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Abstract
The invention discloses a kind of coal mine safety prewarning system based on multicore fiber, to downhole temperature, strain, vibrate and measure simultaneously.Use fibre core perception different in a multicore fiber to temperature, strain and the physical quantity such as vibration, realized the distributed real-time measurement of each physical quantity by many fibre cores beam splitter.The present invention uses an optical fiber i.e. to can use the mode overall merit underground coal mine health status of Multi-sensor Fusion, is greatly saved fiber cable laying cost, only takes up the less bandwidth of communications optical cable, it is adaptable to the detection requirement of adverse circumstances simultaneously.
Description
Technical field
The present invention relates to a kind of use multicore fiber that safety of coal mines is carried out the system of all-fiber monitoring, monitor down-hole in real time
Report to the police.
Background technology
Safety of coal mines life plays vital effect to national economy.Security incident relevant with colliery in recent years emerges in an endless stream,
Badly influence the interests of the country and people, bring a lot of negative social to affect.Therefore, coal field, particularly down-hole are carried out
Omnibearing safety monitoring is the most necessary.Bank circumstance complication, high to electromagnetism requirement of explosion proof, common electrical sensor without
Method adapts to monitoring requirements.Using the means of optical sensing to fire damp concentration, the information such as variations in temperature situation carries out safety monitoring
Can accomplish not by electromagnetic interference influence, essential safety, it is easy to networking, it is adaptable to the safety monitoring demand of coal industry.
Down-hole important physical amount is measured by mode that traditional optical monitoring means typically use point type to sense in real time.Existing reality
With new patent CN201320347593, a kind of coal mine gas gas safety monitoring system based on optical fiber sensing technology is proposed, real
Show the real time on-line monitoring of coal mine gas, there is higher precision, stability in use and higher safety coefficient, decrease powder
Dirt and the moist impact on probe, and can automatically calibrate.Shenhua Group Co proposes a kind of coal mine gob temperature
Monitoring system (application number: 201320477685.X).The back production of hydraulic support is made to move and goaf by guiding erecting device
The laying of sensor fibre synchronizes to carry out, and utilizes optical fiber temperature sensor technology to monitor goaf temperature in real time, it is achieved that to goaf
The remote real time monitoring of temperature.But Distributed Optical Fiber Sensing Techniques does not possess measures temperature simultaneously, strain and the down-hole such as vibration is paid close attention to
The ability of important physical amount.It is generally required to different physical quantitys is measured by multifiber respectively, virtually occupy optical cable
In more fiber resources, increase construction cost simultaneously.Multicore fiber is one of focus of academic research in recent years, is employed
In Large Copacity optic communication of future generation, it is significant for improving optic communication transmission bandwidth.Application on Fibre Optical Sensor is current
Not being the most a lot, Edinburgh, Britain Univ Heriot Watt W.N.Macpherson et al. etches fiber grating in multicore fiber,
And successfully produce the multi-shaft acceleration transducer for adverse circumstances.The most few at the engineer applied of China's multicore fiber sensing
See.
Above technology and patent all fail to realize an optical fiber and multiparameter carry out the demand of Distributed Integration measurement simultaneously, based on
This, the present invention propose a kind of multicore fiber sensing technology to downhole temperature, strain, vibrate and measure simultaneously.Use one
Fibre core perception different in multicore fiber to temperature, strain and the physical quantity such as vibration, realize each physics by many fibre cores beam splitter
The distributed real-time measurement of amount.An optical fiber is used i.e. to can use the mode overall merit underground coal mine health shape of Multi-sensor Fusion
Condition, is greatly saved fiber cable laying cost, only takes up the less bandwidth of communications optical cable simultaneously, it is adaptable to the monitoring of adverse circumstances is wanted
Ask.
Summary of the invention
The technology of the present invention solves problem: overcome prior art many reference amounts to take the deficiency of more telecommunication optical fiber resource when monitoring, it is provided that
Many physical parameters needed for mine monitoring are entered by a kind of coal mine safety prewarning system based on multicore fiber with same sensor fibre
Row is measured in real time, is greatly improved the degree of stability of measurement accuracy and system；Multicore fiber Coal Mine Safety Monitoring System can be real simultaneously
An existing fiber-optic monitoring, is greatly saved testing cost.
The technology of the present invention solution: a kind of based on multicore fiber coal mine safety prewarning system, including: for the multi-fiber of sensing
Core fibre, for connecting the multicore fiber beam splitter of sensor fibre and Transmission Fibers, light source module and demodulation module；Use not
With or identical light source module, couple light into multicore fiber, multicore fiber beam splitter by multicore fiber beam splitter
It is connected to sensor fibre；Sensor fibre is protected through coat and oversheath, is applied to coal field monitored area with the form of optical cable；
When optical cable physical parameter along the line in mine monitoring district changes, the optical cable strain that at optical cable, the deformation in coal seam causes, underground work
Micro-vibration in face is all by optical fiber perception, and is positioned the position of physical quantity variation by situation that is that launch light pulse and that receive light pulse
Put；Finally, the physical quantity of the different fibre core collections of multicore fiber is sent to the different demodulation designed by multi-core fiber beam splitter
Many reference amounts information Real-time demodulation SCN Space Cable Network are transmitted system by system.
Described multicore fiber beam splitter uses Fluohydric acid. by many standard single-mode fibers of diameter 125 μm by the side etched
Method, couples after reaching the identical diameter of multicore fiber that is 125 μm, transmits light wave.
The interlude of the described multicore fiber for sensing draws through same preform when stranding and forms, and material is uniform,
Heat stability is good, has higher certainty of measurement and more preferable stability with using multifiber sensing to compare.
The described interlude for the multicore fiber of sensing is divided into 3 core 4 cores or the standard single-mode fiber of more fibre core, each fibre
Core one physical quantity of monitoring, according to the physical quantity of required monitoring number, fiber cores changeable, be not take up existing Coal Mine Communication money
Source.The length of optical fiber is typically at 4 to 6 kilometers, according to underground coal mine concrete monitoring requirements variable-length.
Variations in temperature, ore deposit at coal field monitoring point shake, ore body structural strain event all can be entered by sensing section multicore fiber
The real-time distributed measurement of row.
Present invention advantage compared with prior art is:
(1) Distributed Optical Fiber Sensing Techniques that the present invention is different from the past needs by one physical quantity of an optical fiber measurement, take and
Instead of, the present invention uses the different fibre cores in an optical fiber can realize the distributed of multiparameter or point measurement, according to sensing need
Ask, combine flexible and changeable.Each fibre core in a piece optical fiber can measure a physical quantity, and to this thing on fiber lengths
The change location location of reason amount.When monitoring physical quantity demand is many when, it is only necessary to increase the number of fibre core when prepared by optical fiber
The distributed real-time measurement of multiparameter can be realized.
(2) use the present invention propose an optical fiber structure carry out colliery measuring multiple parameters, sensor information all in an optical fiber,
Affected by environment little, at utmost avoid systematic error.
(3) the different fibre cores in same optical fiber can complete the distributed measurement of different monitoring variable, according to monitoring requirements, only needs
Change light source and demodulating system, the physical quantity needing monitoring can be changed, flexibly and easily.
(4) integral sensors uses an optical fiber to do transmission sensing medium, and using less communication bandwidth can complete monitoring needs
Ask, reduce cost and the complexity of fiber cable laying, saved communication bandwidth.
Accompanying drawing explanation
Fig. 1 multicore fiber sensor-based system schematic diagram；
The multicore fiber end face of display under Fig. 2 microscope；
Fig. 3 underground optical cable lays schematic diagram；
Fig. 4 multicore fiber temperature-measuring results schematic diagram.
Detailed description of the invention
As it is shown in figure 1, the present invention includes: multicore fiber, multicore fiber beam splitter, light source module and demodulation module；Adopt
With similar and different light source module, coupling light into multicore fiber by multicore fiber beam splitter, multicore fiber divides
The different physical quantities needing monitoring is sent demodulating system to demodulate by bundle device.
The overall structure figure of system is as shown in Figure 2.Interlude fiber section can be 3 core 4 cores or the standard single mode of more fibre core
Optical fiber, according to the number of the physical quantity of required monitoring, fiber cores changeable.The length of optical fiber typically at 4 to 6 kilometers, according to
Underground coal mine concrete monitoring requirements variable-length.The light of light-source system is connected to sensor fibre through many fibre cores beam splitter.Sense light
Fibre is protected through coat and oversheath, is applied to coal field monitored area with the form of optical cable.Mine monitoring district optical cable is along the line
When physical parameter changes, such as the change of temperature, the optical cable strain that at optical cable, the deformation in coal seam causes, mining face under mine micro-
Vibration etc. all by optical fiber perception, and can position physical quantity variation by situation that is that launch light pulse and that receive light pulse
Position.Here the advantage using multi-core fiber to compare traditional distributed Fibre Optical Sensor is, the physical quantity that be there is a need to measure can
With the problem realizing there is not cross sensitivity between the most each physical quantity of distributed monitoring with an optical fiber.Sensing arrangement is compact, collection
One-tenth degree is high, is conducive to improving the precision of detection, reduces systematic error.Further, since underground construction is complicated, only with a light
Fibre advantageously reduces difficulty of construction, improves efficiency.Finally, the different fibre cores of multicore fiber are gathered by multi-core fiber beam splitter
Many reference amounts information Real-time demodulation SCN Space Cable Network are transmitted system by the different demodulating systems that physical quantity is sent to design.
It is illustrated in figure 3 one embodiment of the invention: the interlude for sensor fibre is 4 core standard single-mode fibers,
The number of the physical quantity according to required monitoring, fiber cores changeable.Here, the cable length laid in goaf is 5 kilometers,
According to underground coal mine concrete monitoring requirements variable-length.
The light that the light-pulse generator of 50ns sends is connected to sensor fibre with certain repetition rate through many fibre cores beam splitter.Sensor fibre
Protect through coat and oversheath, be applied to coal field monitored area with the form of optical cable.The thing that mine monitoring district optical cable is along the line
When reason parameter changes, such as the change of temperature, the optical cable strain that at optical cable, the deformation in coal seam causes, the micro-of mining face under mine shakes
Dynamic etc. all by optical fiber perception, and can position physical quantity variation by situation that is that launch light pulse and that receive light pulse
Position.1100 meters to 1250 meter optical cables as shown in Figure 4, are carried out heating and after constant temperature by one typical temperature measurement result figure,
Utilizing distributed satellite systems principle to record temperature value at this is 85 DEG C.If the temperature in optical cable district and strain change simultaneously
Time, same principle is measured while being applicable to the physical quantity such as temperature and strain.Light in the different fibre cores of optical fiber at same optical cable
Phase place will be modulated by temperature and strain respectively, and this signal is transmitted by the different fibre cores in same optical fiber, and many fibre cores beam splitter can
To be sent to different demodulating system demodulation.Thus reduce measured parameter information positioning.Here, similar Serpentis can be used
Shape structure carries out fiber cable laying to underground goaf, and this system of laying contributes to more comprehensively reacting the situation in goaf, convenient
Suddenly raise, due to coal seam temperature, the spontaneous fire caused in monitoring goaf.Whole goaf needs to monitor a length of 1 kilometer,
Cable length can increase to 4 to 6 kilometers.Fig. 4 is the distributed temperature that the core in a typical multicore fiber is carried out
Monitoring experimental result picture.The optical fiber of 1000 to 1250 segment length 250 meters is placed in calorstat, this portion temperature measured value
It it is 80 DEG C.
Here the advantage using multi-core fiber to compare traditional distributed Fibre Optical Sensor is, the physical quantity that be there is a need to measure can be used
The problem that a piece optical fiber realizes there is not cross sensitivity between the most each physical quantity of distributed monitoring.Sensing arrangement is compact, integrated level
Height, is conducive to improving the precision of detection, reduces systematic error.Further, since underground construction is complicated, have only with an optical fiber
It is beneficial to reduce difficulty of construction, improves efficiency.Finally, the physics that the different fibre cores of multicore fiber are gathered by multi-core fiber beam splitter
Many reference amounts information Real-time demodulation SCN Space Cable Network are transmitted system by the different demodulating systems that amount is sent to design.
In a word, the present invention uses an optical fiber i.e. to can use the mode overall merit underground coal mine health status of Multi-sensor Fusion, greatly
Save greatly fiber cable laying cost, only take up the less bandwidth of communications optical cable, it is adaptable to the detection requirement of adverse circumstances simultaneously.
Claims (5)
1. a coal mine safety prewarning system based on multicore fiber, it is characterised in that including: for sensing multicore fiber,
For connecting the multicore fiber beam splitter of sensor fibre and Transmission Fibers, light source module and demodulation module；Use similar and different
Light source module, couple light into multicore fiber by multicore fiber beam splitter, multicore fiber beam splitter be connected to pass
Photosensitive fibre；Sensor fibre is protected through coat and oversheath, is applied to coal field monitored area with the form of optical cable；Colliery is supervised
Survey district optical cable physical parameter along the line when changing, the optical cable strain that at optical cable, the deformation in coal seam causes, mining face under mine micro-
Vibration is all by optical fiber perception, and is positioned the position of physical quantity variation by situation that is that launch light pulse and that receive light pulse；?
After, the physical quantity of the different fibre core collections of multicore fiber is sent to the different demodulating systems designed by multicore fiber beam splitter
Many reference amounts information Real-time demodulation SCN Space Cable Network are transmitted system；
The described interlude for the multicore fiber of sensing is divided into 3 core 4 cores or the standard single-mode fiber of more fibre core, each fibre
Core one physical quantity of monitoring, according to the physical quantity of required monitoring number, fiber cores changeable, be not take up existing Coal Mine Communication money
Source.
Coal mine safety prewarning system based on multicore fiber the most according to claim 1, it is characterised in that: described many
Doped core optical fiber beam splitter uses Fluohydric acid. by many standard single-mode fibers of diameter 125 μm by the method for etching, reaches multi-fiber
Couple after diameter that is 125 μm that core fibre is identical, transmit light wave.
Coal mine safety prewarning system based on multicore fiber the most according to claim 1, it is characterised in that: described it is used for
The interlude of the multicore fiber of sensing draws through same preform when stranding and forms, and material is uniform, Heat stability is good,
With using multifiber sensing to compare, there is higher certainty of measurement and more preferable stability.
Coal mine safety prewarning system based on multicore fiber the most according to claim 1, it is characterised in that: described multi-fiber
The length range of core fibre is 4 to 6 kilometers.
Coal mine safety prewarning system based on multicore fiber the most according to claim 1, it is characterised in that: coal field is supervised
Variations in temperature, ore deposit at measuring point shake, ore body structural strain event all can carry out real-time distributed by sensing section multicore fiber
Measure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410564044.7A CN104454007B (en) | 2014-10-15 | 2014-10-15 | A kind of coal mine safety prewarning system based on multicore fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410564044.7A CN104454007B (en) | 2014-10-15 | 2014-10-15 | A kind of coal mine safety prewarning system based on multicore fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104454007A CN104454007A (en) | 2015-03-25 |
| CN104454007B true CN104454007B (en) | 2016-08-24 |
Family
ID=52900677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410564044.7A Expired - Fee Related CN104454007B (en) | 2014-10-15 | 2014-10-15 | A kind of coal mine safety prewarning system based on multicore fiber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104454007B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107452177B (en) * | 2017-04-14 | 2023-05-23 | 浙江省邮电工程建设有限公司 | Communication optical cable safety precaution system |
| CN108534910A (en) * | 2018-03-19 | 2018-09-14 | 浙江师范大学 | A kind of distributed dual sampling method based on Asymmetric Twin-Core Fiber |
| CN109029832A (en) * | 2018-06-29 | 2018-12-18 | 中国矿业大学 | A method of aquifer water pressure is adopted based on the monitoring of incorporated light fiber sensor |
| CN109901272A (en) * | 2019-04-15 | 2019-06-18 | 武汉地震工程研究院有限公司 | A kind of multi-core optical fiber Intelligent Composite muscle, preparation method and safety monitoring method |
| CN109958056A (en) * | 2019-04-15 | 2019-07-02 | 武汉地震工程研究院有限公司 | Smart stay cable, smart stay cable preparation method and smart stay cable safe condition detection method |
| CN110007392A (en) * | 2019-04-15 | 2019-07-12 | 武汉地震工程研究院有限公司 | A kind of intelligent fiber plate of compound multi-core optical fiber and preparation method thereof |
| CN110388948A (en) * | 2019-08-05 | 2019-10-29 | 长飞光纤光缆股份有限公司 | Distributed temperature, vibration while detection sensor based on multi-core optical fiber |
| CN110440838B (en) * | 2019-08-19 | 2021-09-21 | 武汉地震工程研究院有限公司 | Multi-parameter optical fiber sensing instrument and sensing method based on multi-core optical fiber |
| CN110440837B (en) * | 2019-08-19 | 2021-10-15 | 武汉地震工程研究院有限公司 | Multi-parameter optical fiber synchronous sensing acquisition instrument and sensing acquisition method |
| CN112945123B (en) * | 2021-02-20 | 2022-12-02 | 深圳市沛元科技有限公司 | Double-grating rail surface appearance monitoring sensor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1813209A (en) * | 2003-07-14 | 2006-08-02 | 欧姆龙株式会社 | Monitoring device |
| CN202001063U (en) * | 2010-07-15 | 2011-10-05 | 北京华安奥特科技有限公司 | System for pre-warning water disaster of mine bottom plate |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101956567B (en) * | 2010-09-02 | 2013-10-16 | 上海杰蜀光电科技有限公司 | Intrinsic safety all-fiber underground monitoring system |
| CN102080569B (en) * | 2010-12-10 | 2014-03-19 | 中煤科工集团重庆研究院 | Distributed optical fiber temperature measurement-based fire early warning method for belt conveyor |
| CN103266917A (en) * | 2013-05-20 | 2013-08-28 | 中国矿业大学 | Roof bed separation monitoring system based on fiber grating |
| CN203809051U (en) * | 2013-09-05 | 2014-09-03 | 上海启鹏工程材料科技有限公司 | Fiber bragg grating based safety monitoring system for mine tunnel |
| CN103510986B (en) * | 2013-10-25 | 2015-05-20 | 中国矿业大学 | Tunnel roof separation dynamic monitoring system based on fiber bragg grating and early-warning method thereof |
-
2014
- 2014-10-15 CN CN201410564044.7A patent/CN104454007B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1813209A (en) * | 2003-07-14 | 2006-08-02 | 欧姆龙株式会社 | Monitoring device |
| CN202001063U (en) * | 2010-07-15 | 2011-10-05 | 北京华安奥特科技有限公司 | System for pre-warning water disaster of mine bottom plate |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104454007A (en) | 2015-03-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104454007B (en) | A kind of coal mine safety prewarning system based on multicore fiber | |
| CN104101447B (en) | Distributed optical fiber temperature sensor and method for removing nonlinear error of same | |
| AU747525B2 (en) | Apparatus and method for monitoring a structure using a counter-propagating signal method for locating events | |
| CN103591971B (en) | A kind of localization method of fiber grating | |
| CN107036733B (en) | The many reference amounts Distributed Measurement System and measurement method of twin-core dim light grid array based on dark pulse light source | |
| CN2934569Y (en) | Optical fiber test device suitable for permanent oil gas production well | |
| CN101555990A (en) | Safety monitoring system of long-distance pipeline | |
| CN103439766A (en) | Spatial division multiplexing method for multi-core optical fiber | |
| CN101969344B (en) | Fiber photoelastic effect based larger-area sound monitoring system | |
| CN204612831U (en) | Distributed optical fiber temperature sensor | |
| CN105371781B (en) | A kind of method for measuring three-dimensional shape | |
| CN203642880U (en) | Fiber bragg grating distributed displacement sensor monitoring inner deformation of side slope | |
| CN204028105U (en) | A kind of fiber Bragg grating type wind speed measuring device | |
| CN105371785A (en) | Curvature measurement method | |
| CN106015947A (en) | Internet-based pipeline in-situ monitoring system | |
| CN101956567B (en) | Intrinsic safety all-fiber underground monitoring system | |
| CN102393220A (en) | SMS (single mode-multimode-single mode) optical fiber structural duplexing sensor | |
| CN110726377A (en) | Four-fiber-core fiber grating sensor for measuring tunnel surface morphology | |
| CN109269467A (en) | A kind of fiber grating settlement monitoring device for bridge pre-pressing bracket settlement monitoring | |
| CN104614093B (en) | Bending-insensitive distributed Brillouin optical fiber temperature and strain sensor | |
| CN202690034U (en) | Optical fiber monitoring system for underground temperature and pressure | |
| CN204461643U (en) | A kind of fiber optic distributed temperature sensor and optical fiber distributed type temp measuring system | |
| CN201074511Y (en) | System for testing optical fiber flux of permanence hyperthermia oil gas commercial well | |
| CN202267497U (en) | Multiplexing sensor with SMS (single-mode, multi-mode and single-mode) fiber structures | |
| CN203587125U (en) | Positioning system of fiber grating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160824 Termination date: 20211015 |