CN201507323U - Optical fiber coal mine water inrush precursor information monitor - Google Patents
Optical fiber coal mine water inrush precursor information monitor Download PDFInfo
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- CN201507323U CN201507323U CN2009202685031U CN200920268503U CN201507323U CN 201507323 U CN201507323 U CN 201507323U CN 2009202685031 U CN2009202685031 U CN 2009202685031U CN 200920268503 U CN200920268503 U CN 200920268503U CN 201507323 U CN201507323 U CN 201507323U
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Abstract
The utility model provides an optical fiber coal mine water inrush precursor information monitor which comprises a sensor array, an optical fiber splitter, an optical fiber grating demodulator and a computer. The sensor array comprises an optical fiber temperature sensor, an optical fiber strain sensor, an optical fiber displacement sensor and an optical fiber seepage sensor. The optical fiber temperature sensor, the optical fiber strain sensor, the optical fiber displacement sensor and the optical fiber seepage sensor are optical fiber grating sensors which send the collected temperature, straining, displacement, seepage and other physical quantity to the optical fiber grating demodulator with the optical fiber splitter through optical cables; and the optical fiber grating demodulator converts the collected optical wavelength signals into electric signals, and finally sends the signals to the computer. The computer analyzes and monitors the field information in real time through a software system.
Description
Technical field
The utility model relates to a kind of fiber mine water inrush precursor information monitor, belongs to optical fiber grating sensing, geotechnical engineering monitoring and instrument field.
Background technology
Coal in China industry also exists problems such as industry intensification degree is low, level of the productive forces backwardness, safe condition sternness, and particularly serious accidents such as gas and dust explosion, mine water inrush frequently take place, and disaster accident is many, and economic loss is huge.Wherein the water bursting in mine accident be only second to the coal mine gas accident, but the economic loss that causes occupies always first of the disaster of all kinds of collieries on the death toll and on the frequency.Along with the pit mining condition is tending towards complicated, the water bursting in mine accident is high, only 435 of heavy, especially big water bursting in mine accidents just takes place, dead 2199 people in the period of 7 in 2000 to 2006.In in the past 20 years, have more than 250 mine is not had by water logging, economic loss simultaneously, also causes huge destruction to mine water resource and environment up to more than 350 hundred million yuans.Therefore, the research of conducting shaft water-bursting predicting forecast basic theory and monitoring technology, effectively controlling water damage is the key subjects of Safety of Coal Mine Production.
Though the theory and the method for mine water-bursting predicting forecast have been carried out a large amount of research both at home and abroad,, in the waterproof of colliery, take the method for " have and doubt and must visit, visit afterwards earlier and dig " mostly, even meet pick to visit, both wasted material resources, again waste of manpower; Each detection all need be carried the instrument down-hole operation, can not realize continuous real-time monitoring, can not guarantee detection personnel's personal safety; At present the China's coal-mine checkout gear is to be based upon on the electrical signal detection basis, exists life-span weak point, waterproof anti-explosion poor performance, installation and maintenance complexity, problem that cost is high, and some zone, and prior art is energy measurement not, can not satisfy the needs of safety in production.
The utility model content
The purpose of this utility model is exactly in order to address the above problem, and a cover certainty of measurement height is provided, and volume is little, has favorable waterproof property, anti-electromagnetic interference, and the fiber mine water inrush precursor information monitor that can monitor in real time for a long time.
For achieving the above object, the utility model has adopted following technical scheme:
Fiber mine water inrush precursor information monitor comprises a sensor array, and sensor array is connected with optical fiber splitter by optical fiber; Described optical fiber splitter is connected with computer by the fiber grating demodulation device.
Include fibre optic temperature sensor, fibre optic strain sensor, optical fibre displacement sensor and optical fiber osmotic pressure sensor in the sensor array, each sensor is connected in parallel; Fibre optic temperature sensor, fibre optic strain sensor, optical fibre displacement sensor and optical fiber osmotic pressure sensor are fiber-optic grating sensor.
Fibre optic temperature sensor adopts double pipe structure, comprises an outer tube and an inner sleeve; In the described inner sleeve Fiber Bragg Grating FBG is arranged.The ambient temperature variation is passed to fiber grating by two-layer sleeve pipe, causes the variation of grating centre wavelength.Double-tube structure can effectively be avoided the isoparametric influence of strain.
Fibre optic strain sensor comprises the analog material piece, pastes three Fiber Bragg Grating FBGs on the analog material piece.The analog material piece is a 3cm * 3cm who is made by similar model material * 3cm square, respectively along 0 °, pastes three Fiber Bragg Grating FBGs for 45 ° and 90 ° on the analog material piece, can measure the strain value of horizontal, vertical and tangential three directions simultaneously.
Optical fibre displacement sensor comprises a pedestal, sleeve pipe; Be provided with elastic body and Fiber Bragg Grating FBG in sleeve pipe, wherein elastic body is connected with Fiber Bragg Grating FBG; The elastomeric other end is fixed on the fixed end; The other end of Fiber Bragg Grating FBG is a Transmission Fibers.The pedestal at tested point place moves and makes elastic body elongation, the stressed and generative center wave length shift of fiber grating, and the drift value of grating centre wavelength and the displacement of pedestal are linear.
Described optical fiber osmotic pressure sensor comprises a shell, is provided with the entrance pressure mouth at the two ends of shell, and the top of shell is provided with fairlead; Portion is provided with a press rods in the enclosure, and the two ends of press rods are connected with convoluted diaphragm respectively, and press rods is provided with Fiber Bragg Grating FBG; Grating is drawn a Transmission Fibers by fairlead.Deflection deformation takes place in convoluted diaphragm under pressure, makes the length of fiber grating change, and then causes the drift of fiber grating centre wavelength, and the pressure of the drift value of grating centre wavelength and diaphragm impression is linear.
The utility model comprises sensor array, optical fiber splitter, fiber grating demodulation device and computer.Its sensor array is made up of fibre optic temperature sensor, fibre optic strain sensor, optical fibre displacement sensor and optical fiber osmotic pressure sensor.Fibre optic temperature sensor, fibre optic strain sensor, optical fibre displacement sensor and optical fiber osmotic pressure sensor are as physical quantitys such as sensing element collecting temperature, strain, displacement and osmotic pressures, optical fiber splitter is divided into multi beam with the light that light source in the fiber grating demodulation device sends, be sent to the sensor branch road, and with a branch of demodulating equipment that is sent to of the emission light compositing of sensor, the fiber grating demodulation device is based on the demodulation principle design of F-P chamber, the fiber grating demodulation device changes into the signal of telecommunication with the optical grating reflection light that collects, and realizes Wavelength demodulation.
The optical signal that light source sends is sent to fiber-optic grating sensor through optical fiber splitter and optical cable, before the mine water inrush, physical quantitys such as the temperature of tunnel and goaf country rock, strain, displacement and osmotic pressure can be undergone mutation, thereby cause the variation of sensor reverberation centre wavelength, the reverberation that carries signals such as temperature, strain, displacement and osmotic pressure is transferred to the fiber grating demodulation device through optical cable and shunt, and the grating demodulation device is sent to computer by interface with the wavelength signals of sensor.Computer carries out real-time analysis to the signal of gathering, and can show in real time change curve.
The beneficial effects of the utility model are: the utility model has been realized separating of the signal of telecommunication and optical signal, therefore has favorable waterproof property, and does not have electric spark hidden danger, has improved certainty of measurement.Simultaneously, the utility model is convenient to networking, can realize quasi-distributed real-time monitoring, and carries out analysis-by-synthesis based on different kinds of parameters such as temperature, strain, displacement and osmotic pressures, has improved measuring reliability.
Figure of description
Fig. 1 is the structure chart of the utility model fiber mine water inrush precursor information monitor;
Fig. 2 is a fiber-optical grating temperature sensor;
Fig. 3 is a fiber Bragg grating strain sensor;
Fig. 4 is a fiber grating displacement sensor;
Fig. 5 is a fiber grating osmotic pressure sensor;
Fig. 6 is a temperature pick up change curve of the present utility model;
Fig. 7 is a strain transducer change curve of the present utility model;
Fig. 8 is a displacement transducer change curve of the present utility model;
Fig. 9 is an osmotic pressure sensor change curve of the present utility model.
Wherein, 1, sensor array; 2, fibre optic temperature sensor; 3, fibre optic strain sensor; 4, optical fibre displacement sensor; 5, optical fiber osmotic pressure sensor; 6, optical fiber splitter; 7, fiber grating demodulation device; 8, computer; 9, inner sleeve; 10, outer tube; 11, Fiber Bragg Grating FBG; 12, base; 13, pedestal; 14, sleeve pipe; 15, elastic body; 16, fixed end; 17, Transmission Fibers; 18, shell; 19, entrance pressure mouth; 20, fairlead; 21, press rods; 22, convoluted diaphragm.
The specific embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and embodiment.
Structural representation as shown in Figure 1, fiber mine water inrush precursor information monitor described in the utility model comprise sensor array 1, optical fiber splitter 6, fiber grating demodulation device 7 and computer 8.Sensor array 1 is made up of fibre optic temperature sensor 2, fibre optic strain sensor 3, optical fibre displacement sensor 4 and optical fiber osmotic pressure sensor 5, to physical quantity sensitivities such as temperature, strain, displacement and osmotic pressures, bears the sensing effect in system.Optical fiber splitter 6 is born in system optical signal beam splitting and synthetic effect.Light emitted infrared light in the fiber grating demodulation device 7, fiber grating demodulation device 7 is responsible for the optical wavelength signal of pick-up transducers and is changed into the signal of telecommunication, is ultimately delivered to computer 8.8 pairs of field datas of computer carry out real-time analysis and monitoring.
Fibre optic temperature sensor 2 adopts double pipe structure, comprises an outer tube 10 and an inner sleeve 9; In the described inner sleeve 9 Fiber Bragg Grating FBG 11 is arranged.The ambient temperature variation is passed to fiber grating by two-layer sleeve pipe, causes the variation of grating centre wavelength.Double-tube structure can effectively be avoided the isoparametric influence of strain.
Fibre optic strain sensor 3 comprises analog material piece 12, pastes three Fiber Bragg Grating FBGs 11 on analog material piece 12.Analog material piece 12 is a 3cm * 3cm who is made by similar model material * 3cm squares, on the analog material piece respectively along 0 °, paste three Fiber Bragg Grating FBGs 11 for 45 ° and 90 °, can measure the strain value of horizontal, vertical and tangential three directions simultaneously.
Optical fibre displacement sensor bag 4 is drawn together a pedestal 13, sleeve pipe 14; Be provided with elastic body 15 and Fiber Bragg Grating FBG 11 in sleeve pipe 14, wherein elastic body 15 is connected with Fiber Bragg Grating FBG 11; The other end of elastic body 15 is fixed on the fixed end 16; The other end of Fiber Bragg Grating FBG 11 is a Transmission Fibers 17.The pedestal at tested point place moves and makes elastic body elongation, the stressed and generative center wave length shift of fiber grating, and the drift value of grating centre wavelength and the displacement of pedestal are linear.
Described optical fiber osmotic pressure sensor 5 comprises a shell 18, is provided with entrance pressure mouth 19 at the two ends of shell 18, and the top of shell 18 is provided with fairlead 20; Be provided with a press rods 21 in shell 18 inside, the two ends of press rods 21 are connected with convoluted diaphragm 22 respectively, and press rods 21 is provided with Fiber Bragg Grating FBG 11; Grating is drawn a Transmission Fibers 17 by fairlead 20.Deflection deformation takes place in convoluted diaphragm 22 under pressure, makes the length of fiber grating change, and then causes the drift of fiber grating centre wavelength, and the pressure of the drift value of grating centre wavelength and diaphragm impression is linear.
When the physical quantitys such as temperature, strain, displacement and osmotic pressure around the sensor change, sensor reverberation centre wavelength also changes thereupon, the reverberation that carries signals such as temperature, strain, displacement and osmotic pressure is transferred to fiber grating demodulation device 7 through optical cable and optical fiber splitter 6, and fiber grating demodulation device 7 is sent to computer 8 by interface with the wavelength signals of sensor.The signal of 8 pairs of collections of computer carries out real-time analysis, and can show in real time change curve.
Concrete manufacturing process of the present utility model is: at first, select suitable fiber optic temperature, strain, displacement and osmotic pressure sensor, and it is embedded in the country rock, each monitoring point is laid four sensors simultaneously.Then, form sensing network sensor is connected with optical fiber splitter respectively, and shunt is connected with the optical fiber (FBG) demodulator, (FBG) demodulator links to each other with computer.At last, carry out the network debugging, guarantee that whole sensing network can operate as normal.
In order to realize the purpose of this utility model, in test model, test, obtained result preferably, and the sensor survival rate reaches 95%.
In order to realize the purpose of this utility model, in test model, to test, the sensor survival rate reaches 95%, and has obtained result preferably.By Fig. 6, Fig. 7, Fig. 8 and Fig. 9 as can be seen, along with the driving in exploiting field, colliery, the variations in temperature at top, exploiting field, strain, vertical displacement and osmotic pressure value increase gradually; Before the gushing water of exploiting field, obvious variation has all taken place in these four parameters, has captured the preceding omen of mine water inrush, has successfully predicted the generation of gushing water accident.
Claims (6)
1. fiber mine water inrush precursor information monitor, it is characterized in that: comprise a sensor array, sensor array is connected with optical fiber splitter by optical fiber; Described optical fiber splitter is connected with the fiber grating demodulation device; Described fiber grating demodulation device is connected with computer by netting twine.
2. fiber mine water inrush precursor information monitor according to claim 1, it is characterized in that: include fibre optic temperature sensor, fibre optic strain sensor, optical fibre displacement sensor and optical fiber osmotic pressure sensor in the described sensor array, each sensor is connected in parallel; Fibre optic temperature sensor, fibre optic strain sensor, optical fibre displacement sensor and optical fiber osmotic pressure sensor are fiber-optic grating sensor.
3. fiber mine water inrush precursor information monitor according to claim 2 is characterized in that: described fibre optic temperature sensor adopts double pipe structure, comprises an outer tube and an inner sleeve; In the described inner sleeve Fiber Bragg Grating FBG is arranged.
4. fiber mine water inrush precursor information monitor according to claim 2 is characterized in that: described fibre optic strain sensor comprises the analog material piece, pastes three Fiber Bragg Grating FBGs on the analog material piece.
5. fiber mine water inrush precursor information monitor according to claim 2 is characterized in that: described optical fibre displacement sensor comprises a pedestal, sleeve pipe; Be provided with elastic body and Fiber Bragg Grating FBG in sleeve pipe, wherein elastic body is connected with Fiber Bragg Grating FBG; The elastomeric other end is fixed on the fixed end; The other end of Fiber Bragg Grating FBG is a Transmission Fibers.
6. fiber mine water inrush precursor information monitor according to claim 2 is characterized in that: described optical fiber osmotic pressure sensor comprises a shell, is provided with the entrance pressure mouth at the two ends of shell, and the top of shell is provided with fairlead; Portion is provided with a press rods in the enclosure, and the two ends of press rods are connected with convoluted diaphragm respectively, and press rods is provided with Fiber Bragg Grating FBG; Grating is drawn a Transmission Fibers by fairlead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202685031U CN201507323U (en) | 2009-10-16 | 2009-10-16 | Optical fiber coal mine water inrush precursor information monitor |
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| CN2009202685031U CN201507323U (en) | 2009-10-16 | 2009-10-16 | Optical fiber coal mine water inrush precursor information monitor |
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| CN201507323U true CN201507323U (en) | 2010-06-16 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003211A (en) * | 2010-10-13 | 2011-04-06 | 常恒泰 | Mine alarm system based on fiber bragg grating sensing |
| CN103174462A (en) * | 2013-02-05 | 2013-06-26 | 中国矿业大学 | Permeable water source real-time monitoring recognition device and permeable water source real-time monitoring recognition method |
| CN103266917A (en) * | 2013-05-20 | 2013-08-28 | 中国矿业大学 | Roof bed separation monitoring system based on fiber grating |
| CN103267591A (en) * | 2013-05-24 | 2013-08-28 | 武汉新烽光电科技有限公司 | Tree-type optical fiber temperature sensor system and using method thereof |
| CN103308210A (en) * | 2012-03-06 | 2013-09-18 | 上海华魏光纤传感技术有限公司 | Multi-point series optical fiber point-mode temperature measuring system |
| CN103912311A (en) * | 2014-03-11 | 2014-07-09 | 北京华安奥特科技有限公司 | Mine infrared aqueous detecting and water inrush warning method |
| CN103940529A (en) * | 2014-02-13 | 2014-07-23 | 盘锦辽河油田鸿海钻采技术发展有限公司 | Optical-fiber security monitoring device for oil-field oil transportation station |
| CN106093464A (en) * | 2016-07-27 | 2016-11-09 | 山东省科学院激光研究所 | A kind of optical fiber differential pressure air velocity transducer and application |
| CN106276606A (en) * | 2016-08-09 | 2017-01-04 | 武汉理工大学 | Bridge crane HEALTH ONLINE based on fiber grating sensing technology monitoring system |
-
2009
- 2009-10-16 CN CN2009202685031U patent/CN201507323U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003211A (en) * | 2010-10-13 | 2011-04-06 | 常恒泰 | Mine alarm system based on fiber bragg grating sensing |
| CN102003211B (en) * | 2010-10-13 | 2013-04-10 | 常恒泰 | Mine alarm system based on fiber bragg grating sensing |
| CN103308210A (en) * | 2012-03-06 | 2013-09-18 | 上海华魏光纤传感技术有限公司 | Multi-point series optical fiber point-mode temperature measuring system |
| CN103174462A (en) * | 2013-02-05 | 2013-06-26 | 中国矿业大学 | Permeable water source real-time monitoring recognition device and permeable water source real-time monitoring recognition method |
| CN103266917A (en) * | 2013-05-20 | 2013-08-28 | 中国矿业大学 | Roof bed separation monitoring system based on fiber grating |
| CN103267591A (en) * | 2013-05-24 | 2013-08-28 | 武汉新烽光电科技有限公司 | Tree-type optical fiber temperature sensor system and using method thereof |
| CN103267591B (en) * | 2013-05-24 | 2014-12-10 | 武汉新烽光电科技有限公司 | Tree-type optical fiber temperature sensor system and using method thereof |
| CN103940529A (en) * | 2014-02-13 | 2014-07-23 | 盘锦辽河油田鸿海钻采技术发展有限公司 | Optical-fiber security monitoring device for oil-field oil transportation station |
| CN103912311A (en) * | 2014-03-11 | 2014-07-09 | 北京华安奥特科技有限公司 | Mine infrared aqueous detecting and water inrush warning method |
| CN106093464A (en) * | 2016-07-27 | 2016-11-09 | 山东省科学院激光研究所 | A kind of optical fiber differential pressure air velocity transducer and application |
| CN106276606A (en) * | 2016-08-09 | 2017-01-04 | 武汉理工大学 | Bridge crane HEALTH ONLINE based on fiber grating sensing technology monitoring system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100616 Termination date: 20121016 |