CN103364104B - Fiber bragg grating temperature-sensing monitoring system and method for goaf of coal mine coal face - Google Patents
Fiber bragg grating temperature-sensing monitoring system and method for goaf of coal mine coal face Download PDFInfo
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- CN103364104B CN103364104B CN201310285515.6A CN201310285515A CN103364104B CN 103364104 B CN103364104 B CN 103364104B CN 201310285515 A CN201310285515 A CN 201310285515A CN 103364104 B CN103364104 B CN 103364104B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 72
- 239000003245 coal Substances 0.000 title claims abstract description 46
- 239000000835 fiber Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000013307 optical fiber Substances 0.000 claims abstract description 81
- 238000004891 communication Methods 0.000 claims abstract description 31
- 238000005065 mining Methods 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 18
- 230000003068 static effect Effects 0.000 claims abstract description 18
- 238000003466 welding Methods 0.000 claims description 4
- 239000004744 fabric Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 230000002269 spontaneous effect Effects 0.000 abstract description 13
- 238000002485 combustion reaction Methods 0.000 abstract description 11
- 238000009434 installation Methods 0.000 abstract description 4
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000009529 body temperature measurement Methods 0.000 abstract description 3
- 230000003287 optical effect Effects 0.000 abstract 2
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000008054 signal transmission Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000034994 death Effects 0.000 description 1
- 231100000517 death Toxicity 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
- E21B47/07—Temperature
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
- G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
- G01K11/3206—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres at discrete locations in the fibre, e.g. using Bragg scattering
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K2213/00—Temperature mapping
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Fire Alarms (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
- Alarm Systems (AREA)
Abstract
一种煤矿采煤工作面采空区光纤光栅感温监测系统及方法，属于煤矿工作面采空区感温监测系统及方法。在采空区内布设3～5个监测测站，每个监测测站内包括10～12个光纤光栅温度传感器，每个监测测站内的光纤光栅温度传感器之间通过光纤尾纤串联在一起，将光纤光栅温度传感器的引出端光纤尾纤与通讯光纤连接，通过光纤终端盒将通讯光纤与矿用传输光缆连接，矿用传输光缆与光纤光栅静态解调仪的输入端连接，光纤光栅静态解调仪的输出端与监控计算机相连接。优点：测温精度高、安装方便、方法简便，实现采煤工作面采空区进行大面积、长距离、大范围、远距离、长期的温度实时、在线监测，并对火灾进行提前预警及超限报警，大大减少采空区煤自燃发火的事故发生。
A fiber Bragg grating temperature sensing monitoring system and method for the goaf of a coal mining face belongs to a temperature sensing monitoring system and method for the goaf of a coal mining face. 3 to 5 monitoring stations are arranged in the goaf, each of which includes 10 to 12 fiber Bragg grating temperature sensors. The fiber Bragg grating temperature sensors in each monitoring station are connected in series through fiber pigtails. The fiber pigtails at the lead-out ends of the fiber Bragg grating temperature sensors are connected to the communication optical fiber. The communication optical fiber is connected to the mine transmission optical cable through the optical fiber terminal box. The mine transmission optical cable is connected to the input end of the fiber Bragg grating static demodulator, and the output end of the fiber Bragg grating static demodulator is connected to the monitoring computer. Advantages: high temperature measurement accuracy, easy installation, simple method, large-area, long-distance, wide-range, long-distance, long-term real-time and online temperature monitoring of the goaf of the coal mining face is realized, and early warning and over-limit alarm are given for fires, which greatly reduces the occurrence of spontaneous combustion of coal in the goaf.
Description
Technical field
The present invention relates to a kind of coal mine working face goaf temperature-sensitive monitoring system and method, specifically a kind of coal face goaf optical fiber and grating sensing temperature monitoring system and method,
Background technology
China is the country that coal production is maximum in the world, is also that spontaneous combustion of coal seam gets angry one of the most serious country, not only can carrys out serious economic loss by coal supply mine belt, and can cause the injures and deaths of a large amount of coal mine personnels.According to statistics, the mine in China's State owned coal mine with spontaneous combustion danger accounts for 51.3%, accounts for more than 90% of total mine fire, and due to spontaneous combustion of coal seam, China loses coal resources about 200,000,000 tons every year; Meanwhile, coal spontaneous combustion is also one of reason leading to the great serious accident of coal mine gas from explosion.Visible, spontaneous fire in coal mine becomes one of principal element of restriction mine safety High-efficient Production and development.
Spontaneous combustion of coal seam ignition is the improvement emphasis of fire extinguishing work, and most spontaneous combustion occurs in goaf.Along with the increase of coal mining depth, increasing substantially of mining machines degree, exploitation rate is accelerated day by day, and fully-mechanized mining working float coal thickness is large, cause goaf area constantly to increase, occur that the enlarged in thickness of coal is left in goaf, cause coal spontaneous ignition Frequent Accidents in goaf, and fully-mechanized mining working output is large, equipment is smart, once there is spontaneous combustion certainly will cause huge economic loss.Therefore, preventing and treating goaf coal spontaneous combustion is the emphasis ensureing the safe and efficient production of China's coal-mine.
At present, China's coal-mine freely burning fire is monitored automatically and warning system all adopts the sensor of pyroelectric signal in principle, comprises thermistor (temperature) sensor and thermocouple sensor.They are all that application pyroelectric signal processes, and therefore more responsive to environment, can the quality of surrounding environment directly have influence on system and normally run.Meanwhile, sensor needs Power supply, and the signal of transmission is electric signal, and antijamming capability is more weak, and reliability is lower, and goaf environment is severe, therefore there is many potential safety hazards; And signal transmission distance is short, long-term on-line real time monitoring on a large scale can not be realized.
Summary of the invention
Technical matters: in order to overcome deficiency of the prior art, the object of the invention is to adapt to present mine safety High-efficient Production, meet coal mine downhole safety needs, provide a kind of easy for installation, method is easy, essential safety, exist without potential safety hazard, optical fiber transmission signal, long distance of signal transmission, measuring accuracy is high, the coal face goaf optical fiber and grating sensing temperature monitoring system of good reliability and method.
Technical scheme: object of the present invention is achieved through the following technical solutions: a kind of coal face goaf optical fiber and grating sensing temperature monitoring system, comprises the static (FBG) demodulator of fiber grating, supervisory control comuter, the webserver, client, mining transmission cable, optical fiber terminal box, the first communication optical fiber, the second communication optical fiber, monitoring survey station, fiber-optical grating temperature sensor, optical fiber pigtail, 3 ~ 5 monitoring survey stations are laid in goaf, 10 ~ 12 fiber-optical grating temperature sensors are comprised in each monitoring survey station, be cascaded by optical fiber pigtail between fiber-optical grating temperature sensor in each monitoring survey station, the exit optical fiber pigtail of fiber-optical grating temperature sensor is connected with the first communication optical fiber and the second communication optical fiber respectively, by optical fiber terminal box, the first communication optical fiber is connected with mining transmission cable with the second communication optical fiber, mining transmission cable is connected with the input end of the static (FBG) demodulator of fiber grating, the output terminal of the static (FBG) demodulator of fiber grating is connected with supervisory control comuter, supervisory control comuter passes through the webserver, colliery LAN (Local Area Network) and client carry out data sharing, form the optical fiber and grating sensing temperature monitoring system of coal face goaf all-fiber communication.
Described monitoring survey station is embarked on journey and is spaced, and between-line spacing distance is 15 ~ 20 meters.
Described fiber-optical grating temperature sensor is spaced, and spacing distance is 10 ~ 15 meters.
The connected mode that described fiber-optical grating temperature sensor is cascaded is that optical fiber pigtail is by optical fiber splicer welding or linked together by fiber coupler;
The embedded interpretation software of described supervisory control comuter, can carry out inputting, receive, store, historical query, real-time pictures display, list display, warning early warning.
The method of a kind of coal face goaf optical fiber and grating sensing temperature monitoring:
A, mining transmission cable are divided into two passages by optical fiber terminal box, and two passages connect the first communication optical fiber and the second communication optical fiber respectively;
B, in goaf, a monitoring survey station first established by cloth, in monitoring survey station, one group of fiber-optical grating temperature sensor is arranged at interval, the spacing distance of fiber-optical grating temperature sensor is 10 ~ 15 meters, by optical fiber pigtail, the fiber-optical grating temperature sensor in monitoring survey station is cascaded, along with pushing ahead of coal-face, next monitoring survey station is laid, until complete the monitoring survey station number of setting when spacing distance is 15 ~ 20 meters;
C, the first communication optical fiber and the second communication optical fiber lay the two ends up and down to coal-face, and are connected with the exit optical fiber pigtail of monitoring survey station inner fiber grating temperature sensor;
D, all fiber-optical grating temperature sensors install, and namely enter duty, monitoring goaf temperature variation;
E, the lightwave signal of fiber-optical grating temperature sensor collection is transferred to the static (FBG) demodulator of fiber grating by FIBER OPTIC FIBERS & CABLE, by fiber grating static (FBG) demodulator, lightwave signal is demodulated into digital signal, then supervisory control comuter is transferred to, data processing is carried out by the interpretation software being arranged on supervisory control comuter, real-time display goaf temperature data and variation tendency, when temperature data exceedes the goaf temperature threshold of setting, prediction occurring and warning;
F, by colliery LAN (Local Area Network) 4 and the webserver 3, the goaf temperature data of monitoring is carried out full ore deposit and shares, realize the online real-time remote monitoring of coal work face goaf whole day.
Beneficial effect: owing to have employed such scheme, the present invention has the following advantages:
Present invention employs the temperature in fiber-optical grating temperature sensor monitoring goaf, be configured with the high-end connection devices such as fiber grating static (FBG) demodulator, optical fiber terminal box and optical fiber splitter, temperature measurement accuracy is high, easy for installation, method is easy, fiber-optical grating temperature sensor essential safety, effectively can avoid the impact of electromagnetic interference (EMI) under complicated rugged surroundings, exists without potential safety hazard; The transmission of temperature signal is carried out by optical fiber, long distance of signal transmission, safe and reliable and stable; Realize coal work face goaf carry out large area, long distance, on a large scale, at a distance, long-term temperature in real time, on-line monitoring, response time is short, goaf temperature monitoring result can be provided in time and accurately, and fire is given warning in advance and overload alarm, the accident greatly reducing goaf spontaneous combustion of coal occurs, adapt to the safe and efficient production in present colliery, met coal mine downhole safety needs, promote research work.
Accompanying drawing explanation
Fig. 1 is temperature-sensitive monitoring system structural drawing of the present invention.
In figure, 1, the static (FBG) demodulator of fiber grating; 2, supervisory control comuter; 3, the webserver; 4, colliery LAN (Local Area Network); 5, client; 6, mining transmission cable; 7, optical fiber terminal box; 80, the first communication optical fiber; 81, the second communication optical fiber 9, coal-face; 10, survey station is monitored; 11, fiber-optical grating temperature sensor; 12, goaf; 100, optical fiber pigtail.
Embodiment
Below in conjunction with accompanying drawing, one embodiment of the present of invention are further described:
Embodiment 1: a kind of coal face goaf optical fiber and grating sensing temperature monitoring system, 3 ~ 5 monitoring survey stations 10 are laid in goaf 12, monitoring survey station 10 is embarked on journey and is spaced, between-line spacing distance is 15 ~ 20 meters, 10 ~ 12 fiber-optical grating temperature sensors 11 are comprised in each monitoring survey station 10, the spacing distance of fiber-optical grating temperature sensor 11 is 10 ~ 15 meters, by optical fiber pigtail 100, the mode that the fiber-optical grating temperature sensor 11 in monitoring survey station 10 utilizes optical fiber splicer welding or fiber coupler to connect is cascaded, the exit optical fiber pigtail 100 of fiber-optical grating temperature sensor 11 is connected with the first communication optical fiber 80 and the second communication optical fiber 81, by optical fiber terminal box 7, first communication optical fiber 80 is connected with mining transmission cable 6 with the second communication optical fiber 80, mining transmission cable 6 is connected with the input end of the static (FBG) demodulator 1 of fiber grating, the output terminal of the static (FBG) demodulator 1 of fiber grating is connected with supervisory control comuter 2, supervisory control comuter 2 is by the webserver 3, colliery LAN (Local Area Network) 4 and client 5 carry out data sharing, form the optical fiber and grating sensing temperature monitoring system of coal face goaf all-fiber communication.
Described monitoring survey station is embarked on journey and is spaced, and between-line spacing distance is 15 ~ 20 meters.
Described fiber-optical grating temperature sensor is spaced, and spacing distance is 10 ~ 15 meters.
The connected mode that described fiber-optical grating temperature sensor is cascaded is that optical fiber pigtail is by optical fiber splicer welding or linked together by fiber coupler; Described fiber coupler is the skinny device of conventional connection two optical fiber.
The embedded interpretation software of described supervisory control comuter, can carry out inputting, receive, store, historical query, real-time pictures display, list display, warning early warning.
The method of a kind of coal face goaf optical fiber and grating sensing temperature monitoring:
A, mining transmission cable are divided into two passages by optical fiber terminal box, and two passages are connecting communication optical fiber respectively;
B, in goaf, a monitoring survey station first established by cloth, in monitoring survey station, one group of fiber-optical grating temperature sensor is arranged at interval, the spacing distance of fiber-optical grating temperature sensor is 10 ~ 15 meters, by optical fiber pigtail, the fiber-optical grating temperature sensor in monitoring survey station is cascaded, along with pushing ahead of coal-face, next monitoring survey station is laid, until complete the monitoring survey station number of setting when spacing distance is 15 ~ 20 meters;
C, two communication optical fibers lay the two ends up and down to coal-face, and are connected with the exit optical fiber pigtail of monitoring survey station inner fiber grating temperature sensor;
D, all fiber-optical grating temperature sensors install, and namely enter duty, monitoring goaf temperature variation;
E, the lightwave signal of fiber-optical grating temperature sensor collection is transferred to the static (FBG) demodulator of fiber grating by FIBER OPTIC FIBERS & CABLE, by fiber grating static (FBG) demodulator, lightwave signal is demodulated into digital signal, then supervisory control comuter is transferred to, data processing is carried out by the interpretation software being arranged on supervisory control comuter, real-time display goaf temperature data and variation tendency, when temperature data exceedes the goaf temperature threshold of setting, prediction occurring and warning;
F, by colliery LAN (Local Area Network) and the webserver, the goaf temperature data of monitoring is carried out full ore deposit and shares, realize the online real-time remote monitoring of coal work face goaf whole day.
Coal face goaf of the present invention optical fiber and grating sensing temperature monitoring system and method, some monitoring survey stations are arranged in goaf, fiber-optical grating temperature sensor is used in survey station, down-hole utilizes the high-end connection device such as optical fiber terminal box and optical fiber splitter, system temperature measurement accuracy is high, easy for installation, method is easy, fiber-optical grating temperature sensor essential safety, effectively can avoid the impact of electromagnetic interference (EMI) under complicated rugged surroundings, exists without potential safety hazard; The transmission of temperature signal is carried out by optical fiber, long distance of signal transmission, safe and reliable and stable; Realize coal work face goaf carry out large area, long distance, on a large scale, at a distance, long-term temperature in real time, on-line monitoring, response time is short, goaf temperature monitoring result can be provided in time and accurately, and fire is given warning in advance and overload alarm, the accident greatly reducing goaf spontaneous combustion of coal occurs, adapt to the safe and efficient production in present colliery, met coal mine downhole safety needs, promote research work.
Claims (2)
1. a coal face goaf optical fiber and grating sensing temperature monitoring system, it is characterized in that: this monitoring system, comprise the static (FBG) demodulator of fiber grating, supervisory control comuter, the webserver, client, mining transmission cable, optical fiber terminal box, the first communication optical fiber, the second communication optical fiber, monitoring survey station, fiber-optical grating temperature sensor, optical fiber pigtail, 3 ~ 5 monitoring survey stations are laid in goaf, 10 ~ 12 fiber-optical grating temperature sensors are comprised in each monitoring survey station, be cascaded by optical fiber pigtail between fiber-optical grating temperature sensor in each monitoring survey station, the exit optical fiber pigtail of fiber-optical grating temperature sensor is connected with the first communication optical fiber and the second communication optical fiber respectively, by optical fiber terminal box, the first communication optical fiber is connected with mining transmission cable with the second communication optical fiber, mining transmission cable is connected with the input end of the static (FBG) demodulator of fiber grating, the output terminal of the static (FBG) demodulator of fiber grating is connected with supervisory control comuter, supervisory control comuter passes through the webserver, colliery LAN (Local Area Network) and client carry out data sharing, form the optical fiber and grating sensing temperature monitoring system of coal face goaf all-fiber communication,
Described monitoring survey station is embarked on journey and is spaced, and between-line spacing distance is 15 ~ 20 meters;
Described fiber-optical grating temperature sensor is spaced, and spacing distance is 10 ~ 15 meters;
The connected mode that described fiber-optical grating temperature sensor is cascaded is that optical fiber pigtail is by optical fiber splicer welding or linked together by fiber coupler;
The embedded interpretation software of described supervisory control comuter, can carry out inputting, receive, store, historical query, real-time pictures display, list display, warning early warning.
2. a method for coal face goaf optical fiber and grating sensing temperature monitoring, is characterized in that: method step is:
A, mining transmission cable are divided into two passages by optical fiber terminal box, and two passages are connecting communication optical fiber respectively;
B, in goaf, a monitoring survey station first established by cloth, in monitoring survey station, one group of fiber-optical grating temperature sensor is arranged at interval, the spacing distance of fiber-optical grating temperature sensor is 10 ~ 15 meters, by optical fiber pigtail, the fiber-optical grating temperature sensor in monitoring survey station is cascaded, along with pushing ahead of coal-face, next monitoring survey station is laid, until complete the monitoring survey station number of setting when spacing distance is 15 ~ 20 meters;
C, two communication optical fibers lay the two ends up and down to coal-face, and are connected with the exit optical fiber pigtail of monitoring survey station inner fiber grating temperature sensor;
D, all fiber-optical grating temperature sensors install, and namely enter duty, monitoring goaf temperature variation;
E, the lightwave signal of fiber-optical grating temperature sensor collection is transferred to the static (FBG) demodulator of fiber grating by FIBER OPTIC FIBERS & CABLE, by fiber grating static (FBG) demodulator, lightwave signal is demodulated into digital signal, then supervisory control comuter is transferred to, data processing is carried out by the interpretation software being arranged on supervisory control comuter, real-time display goaf temperature data and variation tendency, when temperature data exceedes the goaf temperature threshold of setting, prediction occurring and warning;
F, by colliery LAN (Local Area Network) and the webserver, the goaf temperature data of monitoring is carried out full ore deposit and shares, realize the online real-time remote monitoring of coal work face goaf whole day.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310285515.6A CN103364104B (en) | 2013-07-08 | 2013-07-08 | Fiber bragg grating temperature-sensing monitoring system and method for goaf of coal mine coal face |
| RU2016103330A RU2620324C1 (en) | 2013-07-08 | 2014-01-27 | Carried out on the basis of lattice fiber-optic system of monitoring and temperature measurement and corresponding way for developed action slaughtering space in coal mining |
| AU2014289870A AU2014289870B2 (en) | 2013-07-08 | 2014-01-27 | Optical fiber grating temperature-sensing monitoring system and method for coal-mining working surface goaf in coal mine |
| PCT/CN2014/071567 WO2015003487A1 (en) | 2013-07-08 | 2014-01-27 | Optical fiber grating temperature-sensing monitoring system and method for coal-mining working surface goaf in coal mine |
| ZA2016/00755A ZA201600755B (en) | 2013-07-08 | 2016-02-03 | Optical fiber grating temperature-sensing monitoring system and method for coal-mining working surface goaf in coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310285515.6A CN103364104B (en) | 2013-07-08 | 2013-07-08 | Fiber bragg grating temperature-sensing monitoring system and method for goaf of coal mine coal face |
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| Publication Number | Publication Date |
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| CN103364104A CN103364104A (en) | 2013-10-23 |
| CN103364104B true CN103364104B (en) | 2015-04-01 |
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| CN201310285515.6A Active CN103364104B (en) | 2013-07-08 | 2013-07-08 | Fiber bragg grating temperature-sensing monitoring system and method for goaf of coal mine coal face |
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| Country | Link |
|---|---|
| CN (1) | CN103364104B (en) |
| AU (1) | AU2014289870B2 (en) |
| RU (1) | RU2620324C1 (en) |
| WO (1) | WO2015003487A1 (en) |
| ZA (1) | ZA201600755B (en) |
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| CN103364104B (en) * | 2013-07-08 | 2015-04-01 | 中国矿业大学 | Fiber bragg grating temperature-sensing monitoring system and method for goaf of coal mine coal face |
| CN103528732A (en) * | 2013-10-25 | 2014-01-22 | 中国矿业大学 | Coal mine goaf top plate strain monitoring system and method based on fiber bragg grating sensing |
| CN104948171A (en) * | 2014-03-25 | 2015-09-30 | 煤科集团沈阳研究院有限公司 | Temperature measurement system of coal mine gob area |
| CN104236605B (en) * | 2014-10-11 | 2016-08-17 | 上海海事大学 | For reducing the colliery fiber grating system in accident rate |
| CN105115624B (en) * | 2015-08-18 | 2017-12-08 | 安徽理工大学 | A kind of floor undulation gushing water thermo parameters method formula method of testing |
| CN106870005B (en) * | 2017-02-28 | 2019-04-16 | 安徽中科智泰光电测控科技有限公司 | A kind of stope working surface of coal mines dynamic monitor and its control method |
| CN107328503B (en) * | 2017-07-11 | 2019-12-06 | 中国矿业大学 | On-line monitoring system and method for coal mine roadway roof stress based on fiber grating sensor |
| CN107246886A (en) * | 2017-07-11 | 2017-10-13 | 中国矿业大学 | Ore deposit pressure signal real-time visual demodulating system and demodulation method based on Fibre Optical Sensor |
| CN107178386A (en) * | 2017-07-24 | 2017-09-19 | 贵州大学 | A kind of system for preventing goaf coal body spontaneous combustion |
| CN109683269B (en) * | 2019-01-28 | 2023-05-16 | 霍州煤电集团有限责任公司 | A rake type optical fiber temperature measuring wiring device and wiring method thereof |
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2013
- 2013-07-08 CN CN201310285515.6A patent/CN103364104B/en active Active
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2014
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2015003487A1 (en) | 2015-01-15 |
| AU2014289870A1 (en) | 2016-02-25 |
| CN103364104A (en) | 2013-10-23 |
| ZA201600755B (en) | 2017-09-27 |
| AU2014289870B2 (en) | 2017-06-15 |
| RU2620324C1 (en) | 2017-05-24 |
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