AU2014289870B2 - Optical fiber grating temperature-sensing monitoring system and method for coal-mining working surface goaf in coal mine - Google Patents
Optical fiber grating temperature-sensing monitoring system and method for coal-mining working surface goaf in coal mine Download PDFInfo
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- AU2014289870B2 AU2014289870B2 AU2014289870A AU2014289870A AU2014289870B2 AU 2014289870 B2 AU2014289870 B2 AU 2014289870B2 AU 2014289870 A AU2014289870 A AU 2014289870A AU 2014289870 A AU2014289870 A AU 2014289870A AU 2014289870 B2 AU2014289870 B2 AU 2014289870B2
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- 239000013307 optical fiber Substances 0.000 title claims abstract description 177
- 238000012544 monitoring process Methods 0.000 title claims abstract description 85
- 239000003245 coal Substances 0.000 title claims abstract description 74
- 238000005065 mining Methods 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000004891 communication Methods 0.000 claims abstract description 31
- 230000003068 static effect Effects 0.000 claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 230000004927 fusion Effects 0.000 claims description 4
- 238000012545 processing Methods 0.000 claims description 4
- -1 monitoring stations Substances 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 abstract description 16
- 230000002269 spontaneous effect Effects 0.000 abstract description 16
- 230000007774 longterm Effects 0.000 abstract description 4
- 238000009529 body temperature measurement Methods 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008054 signal transmission Effects 0.000 description 5
- 238000011160 research Methods 0.000 description 2
- 230000008033 biological extinction Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Classifications
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- 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
-
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K2213/00—Temperature mapping
Abstract
An optical fiber grating temperature-sensing monitoring system for a coal-mining working surface goaf in a coal mine. Between 3 and 5 monitoring stations (10) are distributively arranged within a goaf (12). Each monitoring station (10) comprises between 10 and 12 optical fiber grating temperature sensors (11). In each monitoring station (10), the optical fiber grating temperature sensors (11) are serial-connected therebetween via optical fiber pigtails (100). The lead-out end optical fiber pigtails (100) of the optical fiber grating temperature sensors (11) are connected to communication optical fibers (80 and 81). The communication optical fibers (80 and 81) are connected to a mining-use transmission optical fiber cable (6) via an optical fiber termination box (7). The mining-use transmission optical fiber cable (6) is connected to an input end of the optical fiber grating static demodulator (1). An output end of the optical fiber grating static demodulator (1) is connected to a monitoring computer (2). Also, optical fiber grating temperature-sensing monitoring method for the coal-mining working surface goaf in the coal mine. This allows for implementation of high precision in temperature measurements, convenient installation, simplified method, and large-area, long-distance, wide-range, remote, long-term, real-time, and online monitoring of the temperature of the coal-mining working surface goaf, and provides early warning and overrun alarm with respect to fire hazards, thus greatly reducing occurrence of accidents of spontaneous combustion of goaf coal.
Description
OPTICAL FIBER GRATING TEMPERATURE-SENSING MONITORING SYSTEM AND METHOD FOR COAL-MINING WORKING SURFACE GOAF IN
COAL MINE
Field of the Invention
The present invention relates to temperature sensing and monitoring system and method for the working face goaf in a coal mine, particularly to optical fiber grating-based temperature sensing and monitoring system and method for the coal-mining working face goaf in a coal mine.
Background of the Invention
China is a country having the highest coal yield in the world, as well as one of the countries where spontaneous combustion of coal seams is the most severe. The spontaneous combustion of coal seams not only results in severe economic losses but also cause severe personnel casualties in coal mines. Statistics indicate that mines with a spontaneous combustion risk account for 51.3% among major coal mines in China, and spontaneous combustion accounts for 90% among coal mine fires. China suffers from a loss of about 200 million tons of coal resources per year due to spontaneous combustion of coal seams. In addition, spontaneous combustion of coal is also one of the causes for fatal and vicious accidents of coal-mine gas explosion. It can be seen that the spontaneous combustion of coal seams has become one of the major factors that hamper safe and efficient production and development of coal mines.
Spontaneous combustion of coal seams is a key point in the fire prevention and extinction work. Most spontaneous combustion incidents occur in goafs. The goaf area increases continuously, and the thickness of remaining coal increases in the goaf, as the coal mining depth increases, the degree of mining mechanization is greatly improved, the mining rate is increased, and the thickness of float coal at the fuUy-mechanized mining face is increased; consequently, spontaneous combustion of coal occurs frequently in the goaf; tremendous economic losses will occur inevitably once spontaneous combustion of coal happens, owing to the high yield and advanced equipment at the fully-mechanized mining face. Hence, preventing spontaneous combustion of coal in the goaf is the emphasis for safe and efficient production in coal mines in China.
At present, all automatic monitoring and alarm systems for spontaneous combustion in the coal mines in China employ thermoelectric signal sensors in principle, including thermistor sensors and thermocouple sensors. All of the sensors use thermoelectric signals for the processing. Therefore, these sensors are sensitive to the ambient environment, i.e., the ambient environment has direct influences on the normal operation of the system. In addition, the sensors require power supply and they transmit electrical signals; thus, the sensors have poor anti-interference capability and low reliability. Many potential safety hazards exist in the goafs owing to the harsh environment there; moreover, the signal transmission range is very short; consequently, large-scale long-term on-line real-time monitoring can't be reahzed.
Contents of the Invention
Technical problem: To overcome the drawbacks in the prior art, ensure safe and efficient production in coal mines, and meet the requirement for underground safety in coal mines, the present invention provide optical fiber grating-based temperature sensing and monitoring system and method for coal mining working face goafs, which are convenient to install, easy to use, have intrinsic safety, are free of potential safety hazard, employ optical fibers for signal transmission and support long-distance signal transmission, and have high measuring accuracy and high reliability.
Technical solution: The object of the present invention is achieved by the following technical solution: an optical fiber grating-based temperature sensing and monitoring system for the coal mining working face goaf in a coal mine, comprising an optical fiber grating static demodulator, a monitoring computer, a network server, chent, a mining-use transmission optical fiber cable, an optical fiber terminal box, a first communication optical fiber, a second communication optical fiber, monitoring stations, optical fiber grating temperature sensors, and optical fiber pigtails; 3-5 monitoring stations are deployed in the goaf, each monitoring station comprises 10-12 optical fiber grating temperature sensors, the optical fiber grating temperature sensors in each monitoring station are connected in series via optical fiber pigtails, the lead-out optical fiber pigtails of the optical fiber grating temperature sensors are connected to the first communication optical fiber and the second communication optical fiber respectively, the first communication optical fiber and the second communication optical fiber are connected via the optical fiber terminal box to the mining-use transmission optical fiber cable, the mining-use transmission optical fiber cable is connected to the input side of the optical fiber grating static demodulator, the output terminal of the optical fiber grating static demodulator is connected to the monitoring computer, and the monitoring computer shares data via the network server, a coal mine LAN and clients; thus, an optical fiber grating-based temperature sensing and monitoring system that employs all-optical fiber communication for the coal mining working face goaf in the coal mine is formed.
The monitoring stations are aligned in hnes at 15-20m line interval.
The optical fiber grating temperature sensors are aligned at 10-15m interval.
The optical fiber grating temperature sensors are connected in series, with optical fiber pigtails being welded together via an optical fiber fusion splicer or being connected together via optical fiber couplers.
The monitoring computer has built-in analysis and processing software, which has input, receiving, storage, history search, real-time image display, tabular display, alarm and pre-warning functions.
An optical fiber grating-based temperature sensing and monitoring method for the coal-mining working face goaf in a coal mine, comprising: a. dividing the mining-use transmission optical fiber cable via the optical fiber terminal box into two channels, which are connected to a first communication optical fiber and a second communication optical fiber respectively; b. deploying one monitoring station in the goaf first, deploying a set of optical fiber grating temperature sensors at 10-15m interval in the monitoring station, connecting the optical fiber grating temperature sensors in the monitoring station via optical fiber pigtails; deploying a next monitoring stations at 15-20m interval as the coal mining working face advances, till the preset number of monitoring stations is reached; c. deploying the first communication optical fiber and the second communication optical fiber at the upper end and lower end of the coal mining working face, and connecting them to lead-out optical fiber pigtails of the optical fiber grating temperature sensors in the monitoring station; d. after all the optical fiber grating temperature sensors are installed, i.e. entering working state, using all optical fiber grating temperature sensors to monitor the temperature fluctuation in the goaf; e. transmitting optical-wave signals acquired by the optical fiber grating temperature sensors through the optical fibers and the optical fiber cable to an optical fiber grating static demodulator, demodulating the optical-wave signals into digital signals in the optical fiber grating static demodulator, transmitting the digital signals to a monitoring computer, perform data processing with the analysis and processing software installed in the monitoring computer, and displaying the temperature data and the temperature change trend in the goaf in real time; giving off a pre-warning or alarm once the temperature data exceeds a temperature threshold preset for the goaf; f. sharing the temperature data of goaf in the entire coal mine over a coal mine LAN 4 and a network server 3, to realize 24h on-line real-time remote monitoring of the coal mining working face goaf.
BeneHcial effects: With the technical scheme described above, the present invention has the following advantages:
The present invention employs optical fiber grating temperature sensors to monitor the temperature in a goaf, and uses high-end connection devices, including optical fiber grating static demodulator, optical fiber terminal box, and optical fiber sphtter, etc.; thus, the system provided in the present invention has high temperature measurement accuracy, is convenient to install and easy to use; the optical fiber grating temperature sensors have intrinsic safety, effectively avoid the impact of electromagnetic interference in a complex and harsh environment, and are free of potential safety hazard; with optical fibers for transmission of temperature signals, the system provided in the present invention support a long distance signal transmission, is safe, reliable, and stable; thus, the system provided in the present invention realizes large-area, long-distance, wide-range, and long-term real-time on-line temperature monitoring in a coal mining working face goaf, has short response time, can provide the temperature monitoring result in the goaf timely and accurately, and can give off pre-warnings and out-of-limit alarms against fire disasters; thus, the system can greatly reduce coal spontaneous combustion accidents in the goaf, ensure safe and efficient production in coal mines, meet the requirement for underground safety in coal mines, and promote scientific research.
Description of the Drawings
Fig. 1 is a structural diagram of the temperature sensing and monitoring system of the present invention.
In the figure: 1 - optical fiber grating static demodulator; 2 - monitoring computer; 3 -network server; 4 - coal mine LAN; 5 - client; 6 - mining-use transmission optical fiber cable; 7 - optical fiber terminal box; 80 - first communication optical fiber; 81 -second communication optical fiber; 9 - coal mining working face; 10 - monitoring station; 11 - optical fiber grating temperature sensor; 12 - goaf; 100 - optical fiber pigtail.
Detailed Description of the Embodiments
Hereunder one embodiment of the present invention will be further described in details with reference to the accompanying drawings.
Embodiment 1: An optical fiber grating-based temperature sensing and monitoring system for the coal mining working face goaf in a coal mine, wherein, 3-5 monitoring stations 10 are deployed in lines at 15-20m line interval in the goaf 12, each monitoring station 10 comprises 10-12 optical fiber grating temperature sensors 11 aligned at 10-15m interval, the optical fiber grating temperature sensors 11 in the monitoring station 10 are connected in series with optical fiber pigtails 100 being welded together by an optical fiber fusion splicer or being connected by optical fiber couplers, the lead-out optical fiber pigtails 100 for the optical fiber grating temperature sensors 11 are connected to a first communication optical fiber 80 and a second communication optical fiber 81, the first communication optical fiber 80 and the second communication optical fiber 81 are connected via an optical fiber terminal box 7 to a mining-use transmission optical fiber cable 6, the mining-use transmission optical fiber cable 6 is connected to the input terminal of an optical fiber grating static demodulator 1, the output terminal of the optical fiber grating static demodulator 1 is connected to a monitoring computer 2, the monitoring computer 2 shares data via a network server 3, an coal mine LAN 4 and clients 5; thus, an optical fiber grating-based temperature sensing and monitoring system that employs all-optical fiber communication is formed for the coal mining working face goaf in the coal mine.
The monitoring stations are aligned in lines at 15-20m line interval.
The optical fiber grating temperature sensors are aligned at 10-15m interval.
The optical fiber grating temperature sensors are connected in series with optical fiber pigtails being welded together with an optical fiber fusion splicer or being connected together with optical fiber couplers, wherein, the optical fiber coupler is a conventional small device for connecting two optical fibers.
The monitoring computer has built-in analysis and processing software, which has input, receiving, storage, history search, real-time image display, tabular display, alarm and pre-warning functions.
An optical fiber grating-based temperature sensing and monitoring method for the coal-mining working face goaf in a coal mine, comprising: a. dividing the mining-use transmission optical fiber cable via the optical fiber terminal box into two channels, which are connected to a communication optical fiber respectively; b. deploying one monitoring station in the goaf first, deploying a set of optical fiber grating temperature sensors at 10-15m interval in the monitoring station, connecting the optical fiber grating temperature sensors in the monitoring station in series via optical fiber pigtails; deploying next monitoring stations at 15-20m interval as the coal mining working face advances, till the preset number of monitoring stations is reached; c. deploying two communication optical fibers at the upper end and lower end of the coal mining working face, and connecting them to lead-out optical fiber pigtails for the optical fiber grating temperature sensors in the monitoring station; d. after aU the optical fiber grating temperature sensors are installed, i.e., entering working state, using all optical fiber grating temperature sensors to monitor the temperature fluctuation in the goaf; e. transmitting optical-wave signals acquired by the optical fiber grating temperature sensors through the optical fibers and the optical fiber cable to an ο (Ν (D Ρη ο Ο Γ ΟΟ σ^ 00 (Ν Ο (Ν temperature sensors through the optical fibers and the optical fiber cable to an optical fiber grating static demodulator, demodulating the optical-wave signals into digital signals in the optical fiber grating static demodulator, transmitting the digital signals to a monitoring computer, perform data processing with the analysis and processing software installed in the monitoring computer, and displaying the temperature data and the temperature change trend in the goaf in real time; giving off a per-warning or alarm once the temperature data exceeds a temperature threshold preset for the goaf; f. sharing the temperature data of goaf in the entire coal mine through a coal mine LAN and a network server, to reahze 24h on-line real-time remote monitoring of the coal mining working face goaf.
In the optical fiber grating-based temperature sensing and monitoring system and method for the coal mining working face goaf in a coal mine according to the present invention, a number of monitoring stations are deployed in the goaf, optical fiber grating temperature sensors are used in the monitoring stations, and high-end connection devices such as optical fiber terminal box and optical fiber sphtter are used in the underground area; thus, the system has high temperature measurement accuracy, is convenient to install and easy to use; the optical fiber grating temperature sensors have intrinsic safety, avoids the impact of electromagnetic interference in a complex and harsh environment, and is free of potential safety hazard; with optical fibers for transmission of temperature signals, the system provided in the present invention supports a long distance signal transmission, is safe, reliable, and stable; thus, the system provided in the present invention realizes large-area, long-distance, wide-range, and long-term real-time on-line temperature monitoring in a coal mining working face goaf, has short response time, can provide the temperature monitoring result in the goaf timely and accurately, and can give off pre-warnings and out-of-limit alarms against fire disasters; thus, the system can greatly reduce coal spontaneous combustion accidents in the goaf, ensure safe and efficient production in coal mines, meet the requirement for underground safety in coal mines, and promote scientific research.
The term “comprising” has been considered by the courts in Australia to be limiting on the claims in some circumstances. That is, to include only the features claimed Ό Ο (Ν (D Ρη Ο Ο Γ ΟΟ σ^ 00 (Ν Ο (Ν and no other features. To remove any doubt, we have inserted a paragraph clarifying that the term is inclusive, rather than exclusive.
Some decisions of the courts in Australia have suggested that prior art referred to in the specification forms part of the common general knowledge in Australia. To minimize the risk of this interpretation, we have inserted a paragraph stating that the reference to any prior art in the description should not be taken as an indication that the prior art forms part of the common general knowledge in Australia.
Claims (2)
- Claims1. An optical fiber grating-based temperature sensing and monitoring system for the coal mining working face goaf in a coal mine, comprising: an optical fiber grating static demodulator, a monitoring computer, a network server, clients, a mining-use transmission optical fiber cable, an optical fiber terminal box, a first communication optical fiber, a second communication optical fiber, monitoring stations, optical fiber grating temperature sensors, and optical fiber pigtails; wherein, 3-5 monitoring stations are deployed in the goaf, each monitoring station comprises 10-12 optical fiber grating temperature sensors, the optical fiber grating temperature sensors in each monitoring station are connected in series via optical fiber pigtails, the lead-out optical fiber pigtails of the optical fiber grating temperature sensors are connected to the first communication optical fiber and the second communication optical fiber respectively, the first communication optical fiber and the second communication optical fiber are connected via the optical fiber terminal box to the mining-use transmission optical fiber cable, the mining-use transmission optical fiber cable is connected to the input terminal of the optical fiber grating static demodulator, the output terminal of the optical fiber grating static demodulator is connected to the monitoring computer, and the monitoring computer shares data via the network server, a coal mine LAN and the clients; thus, an optical fiber grating-based temperature sensing and monitoring system that employs all-optical fiber communication for the coal-mining working face goaf in the coal mine is formed, wherein: the monitoring stations are aligned in lines at 15-20m line interval, the optical fiber grating temperature sensors are aligned at 10-15m interval, the optical fiber grating temperature sensors are connected in series with optical fiber pigtails being welded together with an optical fiber fusion splicer or being connected together via optical fiber couplers, the monitoring computer has built-in analysis and processing software, which has input, receiving, storage, history search, real-time image display, tabular display, alarm and pre-warning functions.
- 2. An optical fiber grating-based temperature sensing and monitoring method for the coal-mining working face goaf in a coal mine, comprising the following steps: a. dividing the mining-use transmission optical fiber cable via the optical fiber terminal box into two channels, which are connected to a communication optical fiber respectively; b. deploying one monitoring station in the goaf first, deploying a set of optical fiber grating temperature sensors at 10-15m interval in the monitoring station, connecting the optical fiber grating temperature sensors in the monitoring station in series via optical fiber pigtails; deploying next monitoring stations at 15-20m interval as the coal mining working face advances, till the preset number of monitoring stations is reached; c. deploying two communication optical fibers at the upper end and lower end of the coal mining working face, and connecting them to lead-out optical fiber pigtails for the optical fiber grating temperature sensors in the monitoring station; d. after all the optical fiber grating temperature sensors are installed, i.e., entering working state, using all optical fiber grating temperature sensors to monitor the temperature fluctuation in the goaf,; e. transmitting optical-wave signals acquired by the optical fiber grating temperature sensors through the optical fibers and the optical fiber cable to an optical fiber grating static demodulator, demodulating the optical-wave signals into digital signals in the optical fiber grating static demodulator, transmitting the digital signals to a monitoring computer, performing date processing with the analysis and processing software installed in the monitoring computer, and displaying the temperature data and the temperature change trend of the goaf in real time; giving off a pre-warning or alarm once the temperature data exceeds a temperature threshold preset for the goaf; f. sharing the temperature data of goaf in the entire coal mine through a coal mine LAN and a network server, to realize 24h on-line real-time remote monitoring of the coal mining working face goaf.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310285515.6A CN103364104B (en) | 2013-07-08 | 2013-07-08 | System and method for sensing and monitoring temperature of fiber bragg grating in goaf of coal mine coalface |
| CN201310285515.6 | 2013-07-08 | ||
| 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 |
Publications (2)
| Publication Number | Publication Date |
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| AU2014289870A1 AU2014289870A1 (en) | 2016-02-25 |
| AU2014289870B2 true AU2014289870B2 (en) | 2017-06-15 |
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| AU2014289870A Active 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 |
Country Status (5)
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103364104B (en) * | 2013-07-08 | 2015-04-01 | 中国矿业大学 | System and method for sensing and monitoring temperature of fiber bragg grating in goaf of coal mine coalface |
| 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 |
| 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 |
| CN107328503B (en) * | 2017-07-11 | 2019-12-06 | 中国矿业大学 | coal mine tunnel roof stress on-line monitoring system and method based on fiber bragg grating 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 | Rake type optical fiber temperature measurement wiring device and wiring method thereof |
| CN111119859B (en) * | 2019-12-20 | 2020-11-20 | 中国石油大学(华东) | Near-bit multi-parameter measurement system and method based on fiber bragg grating |
| CN111562033B (en) * | 2020-05-07 | 2021-06-29 | 中国水利水电科学研究院 | Monitoring system and method for preventing fire caused by weeds under photovoltaic panel |
| CN111594252B (en) * | 2020-05-26 | 2022-06-10 | 辽宁工程技术大学 | Prevention and control system and prevention and control method for spontaneous combustion of coal in goaf during mining of extremely spontaneous combustion coal seam |
| CN113551790B (en) * | 2021-07-26 | 2022-05-17 | 中国矿业大学(北京) | Method for laying temperature measuring optical cables in fully mechanized mining face goaf |
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| DE10149092B4 (en) * | 2001-10-05 | 2005-11-03 | GESO-Gesellschaft für Sensorik geotechnischen Umweltschutz und mathematische Modellierung mbH Jena | Method for blanket level monitoring of storage and brine recovery caverns and use of fiber optic sensor cables therefor |
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| CN103364104B (en) * | 2013-07-08 | 2015-04-01 | 中国矿业大学 | System and method for sensing and monitoring temperature of fiber bragg grating in goaf of coal mine coalface |
| CN103528712B (en) * | 2013-10-25 | 2016-04-06 | 中国矿业大学 | Based on the mine shaft freezing wall temperature method of real-time of optical fiber grating sensing |
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2013
- 2013-07-08 CN CN201310285515.6A patent/CN103364104B/en active Active
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2014
- 2014-01-27 RU RU2016103330A patent/RU2620324C1/en active
- 2014-01-27 WO PCT/CN2014/071567 patent/WO2015003487A1/en active Application Filing
- 2014-01-27 AU AU2014289870A patent/AU2014289870B2/en active Active
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| CN102306019A (en) * | 2011-06-22 | 2012-01-04 | 宋志军 | Method for monitoring closed circular coal yard optical fiber temperature and optical fiber monitoring device |
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| Publication number | Publication date |
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| AU2014289870A1 (en) | 2016-02-25 |
| RU2620324C1 (en) | 2017-05-24 |
| WO2015003487A1 (en) | 2015-01-15 |
| CN103364104B (en) | 2015-04-01 |
| CN103364104A (en) | 2013-10-23 |
| ZA201600755B (en) | 2017-09-27 |
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