CN102081831A - Fire early warning method and system for mine belt conveyor - Google Patents
Fire early warning method and system for mine belt conveyor Download PDFInfo
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- CN102081831A CN102081831A CN201010583029.9A CN201010583029A CN102081831A CN 102081831 A CN102081831 A CN 102081831A CN 201010583029 A CN201010583029 A CN 201010583029A CN 102081831 A CN102081831 A CN 102081831A
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Abstract
The invention discloses a fire early warning method and a fire early warning system for a mine belt conveyor. The system comprises temperature measuring optical fibers, a temperature measuring optical fiber host, a temperature measuring optical fiber heat conducting fixture and a monitoring host, wherein the temperature measuring optical fiber host is used for providing incident laser pulses and acquiring and analyzing backward heat dissipation light returned by the temperature measuring optical fibers to acquire the temperatures and distance parameters of temperature measuring points; the temperature measuring optical fiber heat conducting fixture is used for fixing the temperature measuring optical fibers at a plurality of temperature measuring positions on the mine belt conveyor; and the monitoring host is used for receiving the temperature and distance parameter of each measuring point sent by the temperature measuring optical fiber host and comparing whether the temperature value of each position exceeds a warning threshold or not. An attached optical fiber temperature measuring concept is also creatively provided, so that the accuracy and reliability of optical fiber temperature measuring are ensured; the temperature detection of a conducting key point of the heat conducting fixture is creatively combined with direct temperature detection of regional environment through the optical fibers, so that the effect of monitoring the temperature of a rubber belt conveyor without any blind area is achieved, and the fire early detection and early warning of a mine underground conveying belt is realized.
Description
Technical field
The present invention relates to the mine safety field, particularly a kind of monitoring method that is used for the mine belt conveyor fire alarm also relates to a kind of monitoring system that is used for the mine belt conveyor fire alarm.
Background technology
Mine belt conveyor is owing to use for a long time, bring out fire easily, its fire inducement mainly contains following several respects: 1. cylinder skids: under the normal operation, the slip of the relative cylinder surface of adhesive tape generally is no more than 2%, if adhesive tape skids, then exist bigger relative slip between adhesive tape and the cylinder, and cause friction Temperature Rise, as can not in time finding,, temperature will cause fire in case rising to the adhesive tape ignition temperature. and the reason that common drive roll skids has: the back head coal piling of buying securities with all one's capital, anti-skidding glue serious wear on the cylinder, full load starting after stopping in emergency etc.; The main cause that driven cylinder skids then is that roller bearings is badly damaged or stuck.2. carrying roller fault: in the rubber conveyer firing accident, one of main cause that to cause the too high adhesive tape that ignites of carrying roller temperature rise be mining in recent years sealing-tape machine fire owing to carrying roller is stuck.Because the environmental baseline of down-hole is relatively poor, is easy to enter dust in the Idler bearing, the life-span is shorter, and after damage of bearings is stuck, adhesive tape will continue friction on the carrying roller surface, make a large amount of heat of carrying roller accumulation.The carrying roller temperature rises to very high, thus roasting combustion adhesive tape, and the coal-fired powder of the beans-and bullets shooter of going forward side by side enlarges the intensity of a fire rapidly.Also find in the investigation. mainly be that snub pulley does not change and causes that easily adhesive tape catches fire, because snub pulley, particularly near the snub pulley at tail place, carriage is overhead very near, very easily by clear and bright with on the coal dust that scatters surround, coal piling appears, cause the radiating condition variation of carrying roller, make stuck carrying roller temperature rise too high.3. spontaneous combustion of pulverized coal: exist a large amount of dumps on rubber conveyer ground along the line, owing to contact and oxidative heat generation with air, under the not smooth situation of radiating condition, the heat that oxidation generates greater than to around the heat that distributes, cause the temperature of coal to raise gradually and cause " glowing ", in case will spontaneous combustion form the intensity of a fire when reaching the burning-point of coal.4. outside burning things which may cause a fire disaster: except the above-mentioned fire that causes by sealing-tape machine itself, the Another reason that causes the sealing-tape machine fire is extraneous unexpected burning things which may cause a fire disaster, as artificial naked light, wire short-circuiting, down-hole electric substation catch fire, unreasonable site welding, big spoil fall and produce fire by friction below the adhesive tape etc.
Domestic present rubber conveyer Integrated Protection System kind is many, and the manufacturer that scale is bigger mainly contains Tianjin Huaning electronics, Bake, Tianjin, institute of Chongqing coal section, Changzhou connection power robotization, science and technology Changzhou, world robotization research institute etc.The domestic commonplace technology of rubber conveyer fire monitoring that is applied to has: temperature (containing the memorial alloy temperature sensor), smog, carbonomonoxide concentration, flame detector and heat-sensitive cable technology.Wherein main still based on smog, Carbon Monoxide Detection and temperature, realize that key positions such as rubber conveyer head, tail are carried out the condition of a fire to be surveyed.But present smog and Carbon Monoxide Detection technology exist very big limitation, and false alarm rate is very high during actual at the scene the use, and result of use is bad; The temperature detection technology has multiple, to technology such as memorial alloy and noncontact infrared measurement of temperature, all can not realize distributed, the continuous monitoring in whole transportation lane from traditional Pt resistance.
Summary of the invention
In view of this, one of purpose of the present invention has provided a kind of mine belt conveyor fire alarm monitoring method, is applicable to the fire early warning of mine belt conveyor, has the advantage that monitoring effect is good, sensitivity of thermometry is high; Two of purpose of the present invention provides a kind of mine belt conveyor fire alarm monitoring system, this system adopts distribution type fiber-optic to carry out temperature monitoring, and the optical fiber that has creatively proposed to be close to conduction-type is provided with theory, thereby temperature monitoring more accurately and reliably, simultaneously the distributed continuous monitoring in whole transportation lane be can realize, existing belt conveyor monitoring technology rate of false alarm height, coverage is little, continuity is not strong defective in use overcome.
One of purpose of the present invention is achieved through the following technical solutions:
This mine belt conveyor fire alarm monitoring method may further comprise the steps:
1) position of easy breaking out of fire is set to the thermometric position on the mine belt conveyor;
2) all by thermometric optical fiber heat conduction anchor clamps thermometric optical fiber is installed at each thermometric position, the thermal conductive surface of thermometric optical fiber heat conduction anchor clamps directly contacts with the thermometric position and the temperature at this position is directly conducted to thermometric optical fiber;
3) each drive test temperature optical fiber is connected to thermometric optical fiber main frame, transmit temperature and positional information to upper main frame by thermometric optical fiber main frame, monitor the temperature conditions of the rubber conveyer space environment along the line of thermometric position, everywhere and thermometric optical fiber process in real time by upper main frame, when the temperature at thermometric position, somewhere surpasses the early warning threshold values, send control signal.
Two of purpose of the present invention is achieved through the following technical solutions:
This mine belt conveyor fire alarm monitoring system comprises:
Thermometric optical fiber;
Thermometric optical fiber main frame, be used for providing incident laser pulse and gather, analyze from thermometric optical fiber pass back back to heat radiation light, obtain the temperature and the distance parameter of measurement point;
Thermometric optical fiber heat conduction anchor clamps, described anchor clamps are used for thermometric optical fiber is fixed on a plurality of thermometrics position on the mine belt conveyor, described anchor clamps comprise a heat conduction face, and this heat conduction face directly contacts and should locate temperature with thermometric position on the mine belt conveyor and is directly conducted to thermometric optical fiber;
Whether monitoring host computer receives the temperature of each measurement point that sends from thermometric optical fiber main frame and distance parameter and temperature value more everywhere above alarming threshold value.
Further, described thermometric optical fiber heat conduction anchor clamps comprise that optical fiber takes in dish, described optical fiber is taken in dish and is adopted the good metal material of thermal conductivity to make, the middle part that described optical fiber is taken in dish is provided with and is used to coil the fine chamber of giving out light, and the base plane that described optical fiber is taken in dish is fixedlyed connected with the thermometric position on the mine belt conveyor by dismountable stationary installation;
Further, described thermometric optical fiber heat conduction anchor clamps also comprise the protection box body, described protection box body comprises upper cartridge body and lower box body, one end of described upper cartridge body and lower box body is hinged, the other end can closedly relatively tighten, and described optical fiber is taken in dish and is arranged on lower box body inside, and described lower box body is provided with optical fiber inlet and optical fiber outlet, the bottom of said lower box body is provided with optical fiber and takes in the heat-conducting piece that dish is connected, and described heat-conducting piece is used for temperature conduction to the optical fiber at thermometric position is taken in dish; Described stationary installation is arranged on the base plane of lower box body;
Further, described heat-conducting piece and optical fiber are taken in dish and are made one;
Further, described stationary installation is a magnetic suction disc;
Further, described thermometric optical fiber heat conduction anchor clamps comprise heat-conducting piece, heat pipe and fixed support device, and described optical fiber is located in inside heat pipe, and described heat pipe closely contacts with heat-conducting piece and both are fixed near the thermometric position by fixed support device;
Further, described heat pipe and thermometric optical fiber near heat pipe to the small part naked section, be arranged with windproof sheath;
Further, be connected by light mouth and/or network interface between described thermometric optical fiber main frame and the monitoring host computer.
The invention has the beneficial effects as follows:
1) the present invention has adopted the distributed optical fiber temperature measurement technology, by cooperating of thermometric optical fiber and optical fiber main frame, it is strong to have anti-electromagnetic interference capability, corrosion-resistant, passive real-time monitoring, explosion-proof is good, can be around song, highly sensitive, long service life, long transmission distance and advantage easy to maintenance, the present invention has simultaneously also creatively proposed to be close to the theory of formula optical fiber temperature-measurement, promptly the position of easy temperature rise (comprises the rubber conveyer head in the belt conveyor operational process, cylinder such as tail and explain conveyor each carrying roller along the line etc.) the directly heat conduction anchor clamps of contact are set with it, the temperature conduction that to locate by the heat conduction anchor clamps is to thermometric optical fiber, thereby the accuracy and the reliability of optical fiber temperature-measurement have been guaranteed, creatively heat conduction anchor clamps conduction key point temperature detection and the direct surveyed area environment temperature of optical fiber are combined, reached effect to rubber conveyer non-blind area temperature monitoring, realize belt conveyor fire early detection under the coal mine, early warning, and effectively avoided the traditional fiber thermometry only to rely on optical fiber to be exposed to the uncertain and delay that measures ambient temperature causes in the air, the wrong report problem;
2) fire early-warning system of the present invention is because employing is easy to fixture type paving mode mobile and that install, so more help forming the distributed optical fiber temperature measurement network, can satisfy the monitoring temperature and long-time, the continual continuous monitoring of many belt conveyor simultaneously.
Other advantages of the present invention, target and feature will be set forth to a certain extent in the following description, and to a certain extent, based on being conspicuous to those skilled in the art, perhaps can obtain instruction from the practice of the present invention to investigating hereinafter.Target of the present invention and other advantages can realize and obtain by following instructions and claims.
Description of drawings
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing, wherein:
Fig. 1 is electrically connected synoptic diagram for the thermometric main frame;
The temperature survey principle schematic of Fig. 2 optical fiber temperature-measurement main frame;
Fig. 3 is a kind of inner structure synoptic diagram of thermometric optical fiber heat conduction anchor clamps;
Fig. 4 is the external structure synoptic diagram of anchor clamps shown in Figure 3;
Fig. 5 is the structural representation of another kind of thermometric optical fiber heat conduction anchor clamps;
Fig. 6 is the installment state synoptic diagram of heat conduction anchor clamps;
Fig. 7 is installed in the enlarged diagram at V-arrangement snub pulley place for the heat conduction anchor clamps.
Embodiment
Hereinafter with reference to accompanying drawing, the preferred embodiments of the present invention are described in detail.Should be appreciated that preferred embodiment only for the present invention is described, rather than in order to limit protection scope of the present invention.
Fig. 1 is the synoptic diagram that is electrically connected of the present invention, and as shown in Figure 1, thermometric optical fiber main frame has mouthful output of an amp-light mouth of basis/electricity, a power input interface.The light mouth is linked into main frame through ethernet optical fiber transceiver; Electricity mouthful (adopting the RJ45 interface in the embodiments of the invention) after the safety barrier circuit is isolated, is exported the intrinsic safety signal.Main frame has two-way optical fiber input measurement passage, is respectively 1, the 2 tunnel.The grade that power input interface can insert the 50Hz alternating voltage is: 127V/220V/380V/ 660V AC; Power supply divides two-way output, and one tunnel output 24V DC is for inner DTS main frame, and one tunnel output 5V DC is for ethernet optical fiber transceiver.
Optical fiber temperature-measurement main frame in the present embodiment adopts the Raman time domain reflection technology of light, its temperature survey principle as shown in Figure 2, when laser pulse during along Optical Fiber Transmission, its rear orientation light will be passed transmitting terminal back along optical fiber, by gathering, resolve rear orientation light, extract Raman-stoke occulting light and Raman-anti-Stockton light intensity, thereby obtained optical fiber along the road temperature; Measure the time that arrives transmitting terminal to scattered light simultaneously, just can calculate measurement point in the position of light along the road.
Fire early-warning system of the present invention is to utilize heat conduction anchor clamps conduction key point temperature detection and the direct surveyed area environment temperature of optical fiber, both detections combine and realize rubber conveyer non-blind area temperature monitoring, realize belt conveyor fire early detection, early warning under the coal mine.Fig. 3 is a kind of inner structure synoptic diagram of thermometric optical fiber heat conduction anchor clamps, Fig. 4 is the external structure synoptic diagram of these thermometric optical fiber heat conduction anchor clamps, as shown in the figure, the main body of these thermometric optical fiber heat conduction anchor clamps is that optical fiber is taken in dish 1, this optical fiber is taken in dish 1 and is adopted the good metal material of thermal conductivity to make, as red copper etc., taking in dish 1 medium position at optical fiber is provided with and is used to coil the fine chamber 1a that gives out light, through evidence, have only and sensor fibre is coiled in optical fiber takes in dish and go up and to obtain sufficient heat, therefore under the situation that adopts the coil modes of emplacement, must guarantee that also the placement length of optical fiber in optical fiber is taken in dish will reach 1m, fine chamber design must meet the requirement of optical fiber minimum disc loop diameter D 〉=6.5cm so dish is given out light, to satisfy the optical fiber consume;
As further improvement, these thermometric optical fiber heat conduction anchor clamps also comprise a protection box body, this protection box body comprises upper cartridge body 2 and lower box body 3, one end of upper cartridge body 2 and lower box body 3 is hinged, the other end can closedly relatively tighten, and optical fiber is taken in dish and 1 is arranged on lower box body 2 inside, the horizontal direction of lower box body 2 is provided with optical fiber inlet and optical fiber outlet and is provided with in the bottom of lower box body 2 to take in optical fiber coils the heat-conducting piece 4 that is connected, this heat-conducting piece 4 can adopt takes in optical fiber that dish 1 identical material is made and both can be made into one, and the effect of this heat-conducting piece is temperature conduction to the optical fiber at thermometric position is taken in dish 1; The base plane of lower box body 2 is provided with stationary installation for convenience detach 5, from practicality and operability, stationary installation 5 in the present embodiment has adopted magnetic suction disc, needs the thermometric of key monitoring position thereby can very like a cork the heat conduction chuck body be adsorbed on.
Fig. 5 is the structural representation of another kind of thermometric optical fiber heat conduction anchor clamps, as shown in the figure, these thermometric optical fiber heat conduction anchor clamps have adopted the heat pipe-type structure, promptly utilize heat pipe that the heat of heat-conducting piece is transmitted to the sensor fibre that is attached on the heat pipe, it has mainly comprised conducting strip 6, heat pipe 7 and fixed support device 8, in the present embodiment, thermometric optical fiber is located in inside heat pipe, conducting strip 6 selects for use direct applying of copper sheet and thermometric position to carry out heat conduction, and heat pipe is connected with conducting strip 6 and heat pipe 7 is fixed on the top of fixed support device 8 by heat pipe pressing plate 7a, and fixed support device 8 is fixed near the thermometric position by stop nut 9.
By accurate positioning optical waveguides, effective heat conduction optical fiber of 0.5m is installed on the heat pipe, thereby guarantees that this 0.5m optical fiber in the scope of spatial resolution 1m, can realize converting by 0.5m optical fiber the temperature rise of 1m optical fiber.Because the heat dissipation characteristics of heat pipe self is become reconciled, therefore must with heat pipe and thermometric optical fiber near heat pipe to the small part naked section, be arranged with windproof sheath, can guarantee that just sensor fibre absorbs maximum heats.
Fig. 6 is the heat conduction anchor clamps installment state synoptic diagram of system of the present invention, Fig. 7 is installed in the enlarged diagram at V-arrangement snub pulley place for the heat conduction anchor clamps, as shown in the figure, thermometric optical fiber heat conduction anchor clamps 10 can be set at cylinder such as rubber conveyer head, tail and belt conveyor each carrying roller (only having marked the local circumstance that is arranged on the upper supporting roller place among Fig. 6) along the line, and particular location comprises: the represented inboard axle head of V-type snub pulley that goes out among head drum bearing (ball) cover, aircraft tail cylinder end cap, tension drum end cap and Fig. 7.And the temperature-sensitive optical fiber that is arranged on thermometric heat conduction anchor clamps outside is monitored rubber conveyer space environment temperature along the line, emphasis monitoring return belt below float coal temperature, tail coal piling regional temperature.
Mine belt conveyor fire alarm monitoring method of the present invention mainly may further comprise the steps:
1) position of easy breaking out of fire is set to the thermometric position on the mine belt conveyor, and in practice, particular location comprises: head drum bearing (ball) cover, aircraft tail cylinder end cap, tension drum end cap; The inboard axle head of V-type snub pulley.
2) all by thermometric optical fiber heat conduction anchor clamps thermometric optical fiber is installed at each thermometric position, the thermal conductive surface of thermometric optical fiber heat conduction anchor clamps directly contacts with the thermometric position and the temperature at this position is directly conducted to thermometric optical fiber;
3) each drive test temperature optical fiber is connected to thermometric optical fiber main frame, transmit temperature and positional information to upper main frame by thermometric optical fiber main frame, monitor the temperature conditions and the rubber conveyer space environment temperature along the line at thermometric position, everywhere in real time by upper main frame, emphasis monitoring return belt below float coal temperature, tail coal piling regional temperature.When the temperature at thermometric position, somewhere surpasses the early warning threshold values, send alerting signal.
This method just heat conduction anchor clamps conduction key point temperature detection and the direct surveyed area environment temperature of optical fiber combines, with the unique criterion of temperature rise as fire alarm, reached the effect to rubber conveyer non-blind area temperature monitoring, the major technique approach is clear, clear, succinct, the reliability height.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the aim and the scope of the technical program, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (9)
1. mine belt conveyor fire alarm monitoring method is characterized in that: said method comprising the steps of:
1) position of easy breaking out of fire is set to the thermometric position on the mine belt conveyor;
2) all by thermometric optical fiber heat conduction anchor clamps thermometric optical fiber is installed at each thermometric position, the thermal conductive surface of thermometric optical fiber heat conduction anchor clamps directly contacts with the thermometric position and the temperature at this position is directly conducted to thermometric optical fiber;
3) each drive test temperature optical fiber is connected to thermometric optical fiber main frame, transmit temperature and positional information to upper main frame by thermometric optical fiber main frame, monitor the temperature conditions of the rubber conveyer space environment along the line of thermometric position, everywhere and thermometric optical fiber process in real time by upper main frame, when the temperature at thermometric position, somewhere surpasses the early warning threshold values, send control signal.
2. mine belt conveyor fire alarm monitoring system, it is characterized in that: described system comprises:
Thermometric optical fiber;
Thermometric optical fiber main frame, be used for providing incident laser pulse and gather, analyze from thermometric optical fiber pass back back to heat radiation light, obtain the temperature and the distance parameter of measurement point;
Thermometric optical fiber heat conduction anchor clamps, described anchor clamps are used for thermometric optical fiber is fixed on a plurality of thermometrics position on the mine belt conveyor, described anchor clamps comprise a heat conduction face, and this heat conduction face directly contacts and should locate temperature with thermometric position on the mine belt conveyor and is directly conducted to thermometric optical fiber;
Whether monitoring host computer receives the temperature of each measurement point that sends from thermometric optical fiber main frame and distance parameter and temperature value more everywhere above the early warning threshold values.
3. mine belt conveyor fire alarm monitoring system according to claim 2, it is characterized in that: described thermometric optical fiber heat conduction anchor clamps comprise that optical fiber takes in dish, described optical fiber is taken in dish and is adopted the good metal material of thermal conductivity to make, the middle part that described optical fiber is taken in dish is provided with and is used to coil the fine chamber of giving out light, and the base plane that described optical fiber is taken in dish is fixedlyed connected with the thermometric position on the mine belt conveyor by dismountable stationary installation.
4. according to claim 2 or 3 described mine belt conveyor fire alarm monitoring systems, it is characterized in that: described thermometric optical fiber heat conduction anchor clamps also comprise the protection box body, described protection box body comprises upper cartridge body and lower box body, one end of described upper cartridge body and lower box body is hinged, the other end can closedly relatively tighten, described optical fiber is taken in dish and is arranged on lower box body inside, described lower box body is provided with optical fiber inlet and optical fiber outlet, the bottom of said lower box body is provided with optical fiber and takes in the heat-conducting piece that dish is connected, and described heat-conducting piece is used for temperature conduction to the optical fiber at thermometric position is taken in dish; Described stationary installation is arranged on the base plane of lower box body.
5. mine belt conveyor fire alarm monitoring system according to claim 4 is characterized in that: described heat-conducting piece and optical fiber are taken in dish and are made one.
6. mine belt conveyor fire alarm monitoring system according to claim 5 is characterized in that: described stationary installation is a magnetic suction disc.
7. mine belt conveyor fire alarm monitoring system according to claim 1, it is characterized in that: described thermometric optical fiber heat conduction anchor clamps comprise heat-conducting piece, heat pipe and fixed support device, described optical fiber is located in inside heat pipe, and described heat pipe closely contacts with heat-conducting piece and both are fixed near the thermometric position by fixed support device.
8. mine belt conveyor fire alarm monitoring system according to claim 7 is characterized in that: described heat pipe and thermometric optical fiber are arranged with windproof sheath close heat pipe to the small part naked section.
9. mine belt conveyor fire alarm monitoring system according to claim 1 is characterized in that: be connected by light mouth and/or network interface between described thermometric optical fiber main frame and the monitoring host computer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010583029.9A CN102081831B (en) | 2010-12-10 | 2010-12-10 | Fire early warning method and system for mine belt conveyor |
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| CN201010583029.9A CN102081831B (en) | 2010-12-10 | 2010-12-10 | Fire early warning method and system for mine belt conveyor |
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| CN102081831A true CN102081831A (en) | 2011-06-01 |
| CN102081831B CN102081831B (en) | 2012-12-12 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106205019A (en) * | 2016-08-30 | 2016-12-07 | 祖传琦 | Thermal power plant coal conveyer belt condition of a fire method for early warning and system |
| CN108806164A (en) * | 2018-08-07 | 2018-11-13 | 中国恩菲工程技术有限公司 | Mine down-hole fire disaster alarming device and mine down-hole fire alarm method |
| CN113205741A (en) * | 2021-03-26 | 2021-08-03 | 中煤科工集团沈阳研究院有限公司 | Method for selecting detection points for monitoring, early warning and temperature measurement of underground belt fire of coal mine |
| CN116185095A (en) * | 2023-04-27 | 2023-05-30 | 科大智能物联技术股份有限公司 | Spray cooling control system based on infrared imaging |
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| CN201955864U (en) * | 2010-12-10 | 2011-08-31 | 煤炭科学研究总院重庆研究院 | Fire pre-warning monitoring system for mine belt type conveyer |
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| EP0112929A1 (en) * | 1982-12-17 | 1984-07-11 | ERBÖ-MASCHINENBAU ERLEY & BÖNNINGER GMBH & CO. KG | Device for monitoring the function of belt-supporting rollers in belt conveyors |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106205019A (en) * | 2016-08-30 | 2016-12-07 | 祖传琦 | Thermal power plant coal conveyer belt condition of a fire method for early warning and system |
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| CN108806164A (en) * | 2018-08-07 | 2018-11-13 | 中国恩菲工程技术有限公司 | Mine down-hole fire disaster alarming device and mine down-hole fire alarm method |
| CN113205741A (en) * | 2021-03-26 | 2021-08-03 | 中煤科工集团沈阳研究院有限公司 | Method for selecting detection points for monitoring, early warning and temperature measurement of underground belt fire of coal mine |
| CN116185095A (en) * | 2023-04-27 | 2023-05-30 | 科大智能物联技术股份有限公司 | Spray cooling control system based on infrared imaging |
| CN116185095B (en) * | 2023-04-27 | 2023-07-28 | 科大智能物联技术股份有限公司 | Spray cooling control system based on infrared imaging |
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