CN107246281A - Mine self caused fire monitoring early-warning system - Google Patents
Mine self caused fire monitoring early-warning system Download PDFInfo
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- CN107246281A CN107246281A CN201610919937.8A CN201610919937A CN107246281A CN 107246281 A CN107246281 A CN 107246281A CN 201610919937 A CN201610919937 A CN 201610919937A CN 107246281 A CN107246281 A CN 107246281A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 60
- 238000004891 communication Methods 0.000 claims abstract description 20
- 238000004880 explosion Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 110
- 238000000034 method Methods 0.000 claims description 23
- 239000004065 semiconductor Substances 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 15
- 239000013307 optical fiber Substances 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 239000011261 inert gas Substances 0.000 claims description 4
- 238000012806 monitoring device Methods 0.000 claims description 4
- 230000005855 radiation Effects 0.000 claims description 4
- 230000005619 thermoelectricity Effects 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims 1
- 238000009395 breeding Methods 0.000 abstract description 6
- 230000001488 breeding effect Effects 0.000 abstract description 6
- 239000003245 coal Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005259 measurement Methods 0.000 abstract description 3
- 238000004458 analytical method Methods 0.000 abstract description 2
- 239000000428 dust Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 9
- 239000000835 fiber Substances 0.000 description 6
- 230000003287 optical effect Effects 0.000 description 6
- 239000000203 mixture Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 230000010365 information processing Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 229910000530 Gallium indium arsenide Inorganic materials 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000002146 bilateral effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000007569 slipcasting Methods 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
Classifications
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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
-
- 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
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
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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
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
- E21F5/02—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires by wetting or spraying
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
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- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a kind of mine self caused fire monitoring early-warning system.Mine self caused fire is disguised strong, and easily triggers gas explosion, the secondary disaster of dust explosion, causes a tremendous loss of lives；Existing breeding fire warning system time delay is long, easily misrepresents deliberately and fails to report.The system mainly includes netscape messaging server Netscape, warning device, communication network, extinguishing device, gas concentration sensoring, device for detecting temperature etc.；System can be monitored by gas concentration sensoring to features such as the gas concentrations in the environment of monitored area, and by sending fire alarm to the Monitoring Data comprehensive analysis such as temperature, and put out a fire.The system can accurate measurements breeding fire characteristic gas, substantially increase the alarm degree of accuracy, important leverage provided for Safety of Coal Mine Production.
Description
Technical field
The present invention relates to a kind of mine self caused fire monitoring early-warning system, the system be related to sensor technology, laser technology,
The fields such as spectral analysis technique, signal processing technology.
Background technology
Coal is China's main energy sources, accounts for primary energy 70%.Coal industry is high risk industries, gas, fire, top
The accidents such as plate, coal dust annoying Safety of Coal Mine Production.Coal mine fire include breeding fire and exogenous fire, breeding fire because
It is difficult to be found by force for disguise, and easily triggers gas explosion, the secondary disaster of dust explosion, causes a tremendous loss of lives.
Therefore find and can put out in time in internal cause Initial Stage of Fire to have very important significance in time.The most of internal cause in colliery
Fire occurs in covered place, and traditional instrument and meter Detection Techniques are all difficult to position that is definite, rapidly finding out concealed fire
And scope.The monitoring method of current breeding fire mainly uses gas-monitoring and temperature monitoring, and gas-monitoring is by beam tube system
System extracts sample gas and analyzed to ground in face of symbolic gas, because the path of gas extraction is longer, easily occurs gas leakage and plugging, and
And delay in this way is longer, optimal fire extinguishing and escape opportunity are easily missed, in addition can not using this monitoring method
Burning things which may cause a fire disaster is accurately positioned, is that the disaster relief is made troubles.Current fiber optic Distributed Temperature monitoring method is also applied, but optical fiber is present easily
The problems such as damaging, install complex, difficult in maintenance.Therefore a kind of new mine self caused fire monitoring early-warning system is needed, with
Meet Safety of Coal Mine Production requirement.
The content of the invention
Present invention aims at providing a kind of mine self caused fire monitoring early-warning system, can remote sensing monitoring breeding fire cause
Temperature and symbolic gas CH4、CO、CO2、O2、C2H2And C2H4Change in concentration, fire is carried out according to the obtained abnormal data of monitoring
Calamity is alarmed, and conflagration area is put out a fire, and reduces fire hazard scope.The system mainly includes gas concentration remote sensing and filled
Put, device for detecting temperature, extinguishing device, netscape messaging server Netscape, warning device and communication network；Gas concentration sensoring master
To include generating laser, laser pickoff, control process unit and display unit；Gas concentration sensoring is using open gas
Room, can carry out remote sensing monitoring to multiple gases concentration in the environment of goaf；Gas concentration sensoring has laser ranging function；
Netscape messaging server Netscape is responsible for processing gas concentration data and temperature data, when Monitoring Data meets alert if, then passes through report
Alert unit sends sound and light alarm, sends fire alarm information by communication network, and put out a fire by extinguishing device.
1. described in system further comprise：The gas concentration sensoring of system carries out different distance area using following methods
The gas concentration monitoring in domain：Device launches two beam laser of different directions in same point, and the pip A and B of different distance are entered
Row measurement；If the distance for measuring pip A is LA, gas mean concentration is MA, the distance for measuring pip B is LB, gas is average
Concentration is MB, then the gas concentration of A points to B point distance areas is availableApproximate representation.
2. described in system further comprise：The gas concentration sensoring of system is swept using following scanning monitoring methods
Retouch monitoring：The laser beam of the laser transmitter projects different directions of gas concentration sensoring carries out gas concentration and apart from prison
Survey, obtain the data sequence of gas concentration, distance and direction of the launch composition, the gas that different distance region is obtained after processing is dense
Degree.
3. described in system further comprise：The generating laser use of the gas concentration sensoring of system can be automatically adjusted
The generating laser of the direction of the launch, control process unit is carried out not with scanning monitoring mode control laser transmitter projects direction
Equidirectional gas concentration and apart from monitoring.
4. described in system further comprise：The generating laser use of the gas concentration sensoring of system can be automatically adjusted
The generating laser of the direction of the launch, control process unit is carried out not with scanning monitoring mode control laser transmitter projects direction
Equidirectional gas concentration and apart from monitoring.
5. described in system further comprise：The generating laser of the gas concentration sensoring of system is produced by lasing light emitter
Laser a, lasing light emitter can produce the laser for detecting multiple gases.
6. described in system further comprise：The gas concentration sensoring of system carries out three dimensions area using following methods
The gas concentration monitoring in domain：Gas concentration sensoring launches reflection of the laser beam of different directions to different distance in same point
Point is measured, and obtains distance of the launch point away from each pip；Using launch point as reference point, to pip distance and Laser emission
Bearing data is handled, and obtains the coordinate data of each pip, according to all reflection point coordinate datas, obtains three dimensions mould
Type, the gas concentration in the different distance region obtained by computing is corresponding with three-dimensional space model, obtain three dimensions area
The gas concentration in domain.
7. described in system further comprise：The generating laser lasing light emitter of the gas concentration sensoring of system is using adjustable
Humorous semiconductor laser；The controlled processing unit control of semiconductor laser with tunable, sends the laser of different wave length；Laser connects
Receive device and receive the laser reflected, laser signal is converted into electric signal, control process cell processing electric signal obtains corresponding
Gas concentration.
8. described in system further comprise：The generating laser of the gas concentration sensoring of system can send CH4、CO、
CO2、O2、C2H2And C2H4The laser of the different wave length of molecule absorption peak value.
9. described in system further comprise：The equipment being arranged in system in explosion environment is explosion-proof type equipment.
10. described in system further comprise：The device for detecting temperature of system includes fibre optical sensor, wireless temperature and sensed
Device, thermal infrared imager, infrared thermoelectricity are released or infrared radiation thermometer.
11. described in system further comprise：The extinguishing device of system includes grouting equipment.
12. described in system further comprise：The extinguishing device of system includes inert gas spraying equipment.
Brief description of the drawings
Fig. 1 mine self caused fire monitoring early-warning system composition schematic diagrams.
Fig. 2 mine self caused fire monitoring early-warning system workflow diagrams.
The principle schematic of Fig. 3 gas concentration sensorings embodiment 1.
The principle schematic of Fig. 4 gas concentration sensorings embodiment 2.
The collimater arrangement architecture schematic diagram of Fig. 5 gas concentration sensorings embodiment 2.
Fig. 6 gas concentration sensoring three-dimensional spatial area concentration monitor schematic diagrames.
Fig. 7 gas concentration sensoring workflow diagrams.
Embodiment
Fig. 1 is mine self caused fire monitoring early-warning system composition schematic diagram, and the system composition includes：
1. netscape messaging server Netscape (1)：It is responsible for storing each sensing data, and monitors CH4、CO、CO2、O2、C2H2
And C2H4Concentration data, temperature data change, alarm signal is sent by analyze data change, and control fire extinguishing.
2. warning device (2)：Sound and light alarm is sent by netscape messaging server Netscape control, passed through with netscape messaging server Netscape
RS232 interface connection communications.
3. monitoring device (3)：For production, administrative staff provide data query and production monitoring service, by information processing services
Device provides field data, is shown with alarm and GIS service function.
4. core switch (4)：It is responsible for management and the data exchange of the equipment of all access to communication networks, is exchanged with underground
Machine (5) is connected by optical fiber.Communication network device includes core switch (4), underground interchanger (5) and substation (6).
5. underground interchanger (5)：It is responsible for access and the data exchange of substation (6), each underground interchanger is by optical fiber with ring
Net mode is connected.
6. substation (6)：Be responsible for the access of gas concentration sensoring (7) device for detecting temperature (8) and extinguishing device (9) with
Data exchange, with network switch function, is connected with underground interchanger (5) by optical fiber；With RS485 interfaces.
7. gas concentration sensoring (7)：Using open air chamber, remote sensing prison can be carried out to multiple gases concentration in environment
Survey, with laser ranging function, with 3D region gas concentration monitoring function, substation (6) is connected by network interface.
8. device for detecting temperature (8)：Fibre optical sensor, radio temperature sensor, thermal infrared imager, infrared thermoelectricity can be used
Release or infrared radiation thermometer in any one equipment.Fibre optical sensor can use U.S. DTS Sequence distribution formula fibre optical sensors, lead to
Cross network interface connection substation；Radio temperature sensor can use wireless sensor network equipment, star-like connected mode, by coordinating
Device node device connects substation (6) by RS485 interfaces；Thermal infrared imager can use the Haikang DS- with intelligent recognition function
2CD8313PF-E25 infrared thermal imaging web cameras, directly connect substation (6) by network interface；It can use digital red
Outer thermoelectricity releases alarm, and substation (6) is connected by RS485 interface modules；Infrared radiation thermometer can use non-contact infrared temperature
Instrument DT8012B, substation (6) is connected by RS485 interface modules.
9. extinguishing device (9)：Inert gas spraying equipment or grouting equipment can be used.Extinguishing device passes through RS485 interfaces
With substation (6) connection communication.
Fig. 2 is mine self caused fire monitoring early-warning system workflow diagram：
1. (201) gas concentration sensoring (7) and device for detecting temperature (8) are by the CH collected4、CO、CO2、O2、
C2H2And C2H4Concentration data, temperature data sends substation (6) to.
2. (202) substation (6) receives gas concentration sensoring (7), the data of device for detecting temperature (8), data are turned
It is sent to underground interchanger (5).
3. (203) core switch (4) in the data transfer to well that underground interchanger (5) transmits data substation.
4. (204) core switch (4) transfers data to netscape messaging server Netscape
5. (205) netscape messaging server Netscape is stored to each sensing data, and analyze data changes, such as data variation
Meet alert and if alarm signal is then sent by RS232 Interface Controllers warning device (2) and monitoring device (3).Data exception
Including CO, CO in specific monitored area2Concentration lift-off value exceedes given threshold, CH in setting time interval4、O2、C2H2、C2H4
Concentration decreasing value exceedes given threshold in setting time interval, and the exception of every kind of gas concentration is used as an independent data
It is abnormal；Temperature data lift-off value in setting time interval exceedes given threshold；When data exception quantity exceed given threshold,
Then send fire alarm；Each monitoring threshold is measured to set or be manually set according to site environment and obtained.
6. (505) controlling alarm that warning device (2) receive information processing server (1) is transmitted by RS232 interfaces is believed
Number, send sound and light alarm.
7. (506) alarm signal that monitoring device (3) receive information processing server (1) is transmitted by core switch (4)
Number, fire location is shown by computer display screen.
8. (507) extinguishing device (9) reception sends substation (6) to by netscape messaging server Netscape (1) by communication network, then
The control signal forwarded by substation (6) by RS485 interfaces, opening controlling valve door injection inert gas or slip casting are put out a fire.
Fig. 3 be gas concentration sensoring the principle schematic of embodiment 1, mainly including generating laser, swash
Optical receiver, control process unit and display unit.Control process unit is responsible for controlling laser transmitter projects laser；Processing swashs
The signal that optical receiver is returned obtains gas concentration and reverberation distance；Control communication interface is communicated；Control display screen shows
Show；Receive the operation signal of button and handled accordingly.Core processor (301), signal generator (302), phaselocked loop
Amplifier (303), analog-digital converter (304), digital phase discriminator (305) and other auxiliary elements；Generating laser is responsible for ranging
And the transmitting of the laser signal of gas-monitoring, including lasing light emitter (306) and head (307)；Laser pickoff is responsible for receiving laser
Signal, electric signal is converted to by laser signal, and concrete composition includes receiving lens (308), darkroom (309) and photodetector
(310)；Communication interface (311) is transmitted for Monitoring Data；Display unit is responsible for gas concentration and shown with working state of device data
The main element shown is display screen (312).Main element includes：
1. core processor (301), using Samsung S3C2440 processors, S3C2440 is based on the micro- of ARM920T kernels
Processor,；S3C2440 has 3 UART interfaces, 2 SPI interfaces, 2 USB interfaces, 1 IIC-BUS interface；Use insertion
Formula Linux platform realizes that drive control communicates.
2. signal generator (302), being responsible for producing is used to control laser transmitter projects to be used for the tune that gas concentration is monitored
Sawtooth wave control signal processed and the reference signal of signal analysis, including multiple portions such as DDS generators, filter circuit, adder
Point.
3. phaselocked loop amplifier (303), using two modules, be each responsible for extracting gas absorption signal once, it is secondary
Harmonic wave, suppresses noise using the orthogonal property of signal and noise, improves signal to noise ratio, can mutually be amplified using LIA-MV-150 locks
Device module.
4. analog-digital converter (304), be responsible for by lock-in amplifier demodulate once, secondary analog signal be converted into numeral
Signal, can use 16 multi-channel a/d converter chips of ADS8364, with 6 fully differential input channels.
5. digital phase discriminator (305), responsible to handle the distance measuring signal received, signal will be received and entered with sending control signal
Row is compared, and obtains the phase difference between signal, and send phase difference to core processor by interface with data mode.
6. lasing light emitter (306), using semiconductor laser with tunable, can send the laser of multi-wavelength, for measuring not
Same gas concentration, can be using the serial semiconductor laser with tunable of IBSG-TO5TEC, and the semiconductor laser with tunable is integrated
TEC current temperatures control semiconductor element, for temperature adjustment, stabilizing wave lenth of laser and power.
7. head (307), for controlling the direction of the launch of semiconductor laser with tunable (311) and connecing for laser pickoff
Debit to, can by the external MAX485 chips in core processor SPI communication port pass through cradle head control protocol integrated test system head move, cloud
Platform can rotated both horizontally and vertically using video camera standard supervision head.
8. receiving lens (308), the laser for being responsible for will reflect back into is assembled to photodetector.
Darkroom 9. (309), using closed cylindrical structure, inwall applies light absorbent.
10. photodetector (310), is responsible for the laser signal received being converted to electric signal, including light receiving element
And amplifying circuit；Light receiving element uses InGaAs PIN photodiodes, and amplifying circuit main element uses AD603, in parallel
Two voltage followers connect phaselocked loop amplifier (307) and digital phase discriminator (309) respectively.
11. communication interface (311), including wired communication interface and wireless communication interface, the main core of wired communication interface
Piece uses the singlechip Ethernet mac controller that DM9000, DM9000 are completely integrated, and the procotol on upper strata is by core processing
The built-in Linux drivings of device are supported.DM9000 supports 10/100M adaptive, supports 3.3V and 5V supply voltage.DM9000 leads to
Network isolation transformer interface chip YL18-1080S connection RJ45 network interfaces are crossed, realizes and the physical connection of network is led to
Letter；Wireless communication interface uses the Wifi wireless network cards of standard USB interface, is driven in system, USB port driving and Wifi wireless network cards
Dynamic program realizes network communication services under supporting.
12. display screen (312), using 3.5 cun of color LCD screens, resolution ratio 480x800 carries display driving journey by Linux
Sequence drives.
13. button (313), for gas concentration sensoring parameter and function setting and control, including determine, return,
The function key such as move up, move down.
Fig. 4 is the principle schematic of embodiment 2 of gas concentration sensoring.Embodiment 2 and embodiment 1
One difference is to use the multiple different semiconductor laser with tunable controlled by multi-channel data selector (314), is used for
Launch the laser of different wave length, laser need to be launched by splicer (315) and light path selector and collimater；Another area
It is not embodiment 2 without head, and uses 8 collimaters, each collimater points to different directions, 8 collimaters
(317) connection light selector switch (316), light selector switch (316) is sent splicer (315) by the control of core processor (301)
Laser carry out routing, laser is sent from certain road collimater (317) of selection, thus realize time division multiplexed be multiplexed.It is involved
Element it is as follows：
1. multi-channel data selector (314), is responsible between signal generator (305) and multichannel semiconductor laser with tunable
Gating, can use CD4051BC bilateral analog switch, by core processor (302) 3 I/O mouthful control gating, 1 I/O
Mouth controlling switch；IN/OUT mouthfuls of COMMON is connected with signal generator (305), and 4 IN/OUT mouthfuls connect different tunable respectively
Semiconductor laser (311).
2. lasing light emitter (306), using semiconductor laser with tunable, can send monitored gas absorption peak wavelength
Laser, gas with various uses the semiconductor laser with tunable of different wave length, can be using SAF117XS Series Bellevilles tunable half
Conductor semiconductor laser with tunable, the integrated TEC current temperatures control semiconductor element of the semiconductor laser with tunable.
3. splicer (315), a branch of by the Laser synthesizing of different wave length using optical fiber wave multiplexer, the present apparatus each tunable half
Conductor laser uses time division emission, so the output end at most also laser output of only one of which wavelength at any time.
4. smooth selector switch (316) can use Vispace 1000OSS light routing devices, passed through by core processor (302)
Serial ports control routing connection.
5. collimater (317), the light beam that control laser orientation is launched and formed in space, is swashed using FC Interface Fibers
Light collimating lenses.
Fig. 5 is the collimater arrangement architecture schematic diagram of gas concentration sensoring embodiment 2.
Fig. 6 is gas concentration sensoring three-dimensional spatial area concentration monitor schematic diagram.If device launches 8 beam laser, point
Do not reflected in A, B, C, D, E, F, G, H point, set up three-dimensional system of coordinate using device position as the origin of coordinates, it is known that laser
The angle for projecting straight line OA and XOY plane is α, and the angle with YOZ planes is β, then pip A coordinates
The coordinate of other each points can be similarly obtained, can be built according to coordinate points
Vertical three-dimensional space model as shown in Figure 6.The gas concentration respectively M measured in scanning monitoring process by each pipA、
MB、MC、MD、ME、MF、MG、MH, K points are any point inside shown spatial model, by K points perpendicular to Y-axis plane with
AB, DC, EF, HG intersection point are respectively KAB、KDC、KEF、KHG, its coordinate is respectively (xAB,yAB,zAB)、(xDC,yDC,zDC)、(xEF,
yEF,zEF)、(xHG,yHG,zHG), then KABThe gas concentration of pointKDCThe gas concentration of pointKEFThe gas concentration of pointKHGThe gas of point
Bulk concentrationPass through straight line and K of the K points parallel to Z axisAB KDCAnd KEF KHGIntersection point
Respectively KABCDAnd KEFGH, its X-axis coordinate is respectively xKABCDAnd xKEFGH, obtain KABCDThe gas concentration of pointAnd KEFGHThe gas concentration of point
And then obtain the reference concentration of K pointsPass through above example algorithm
Can obtain in three-dimensional spatial area gas concentration a little.
Gas concentration sensoring workflow is as shown in Figure 7：
1. (701), core processor (301) start by set date once monitors scanning process.
2. (702), carrying out laser ranging first, core processor (301) control signal generator (302) is producing 10M just
String ripple signal.
3. (703), sine wave signal driving lasing light emitter (306) sends the laser for detection range.Embodiment 1 is sinusoidal
Ripple signal directly drives semiconductor laser with tunable, and the sine wave signal of embodiment 2 need to pass through multi-channel data selector (314)
Behind selection path, then corresponding semiconductor laser with tunable is driven, then by splicer (315), light path selector switch (316),
Laser is launched by the collimater (317) of respective angles.
4. (704), range laser runs into reverberation fraction of laser light and reflected, receiving lens (308) collect what is reflected
Laser is assembled to photodetector (310), and the laser signal received is converted to electric signal by photodetector.
5. (705), digital phase discriminator (305) handles the ranging electric signal received, after amplified, mixing etc. is handled, obtain
Obtain sending the phase difference between control signal, phase difference sends core processor to data mode by interface.
6. (706), core processor (301) receiving phase difference data, is obtained between device and reverberation according to phase difference
Distance.
7. (707), core processor (301) control signal generator sends 50Hz sawtooth signal and with 50kHz's
Sinusoidal signal is modulated.
8. (708), modulated sawtooth signal driving lasing light emitter (306) sends inswept a certain gas absorption peak ripple
The laser of long scope.The sine wave signal of embodiment 1 directly drives semiconductor laser with tunable；The sine wave of embodiment 2 is believed
Number need to be after multi-channel data selector (123) select corresponding gas passage, then drive corresponding tunable semiconductor laser
Device, then by splicer (315), light path selector switch (316), laser is launched by corresponding collimater (317).
9. (709), laser runs into reverberation fraction of laser light through the air of tested region and reflected, receiving lens (308)
Collect the laser reflected to assemble to photodetector (310), the laser signal received is converted to electricity by photodetector
Signal.
10. (710), phaselocked loop amplifier (303) receives electric signal, and timesharing receives the modulation letter that signal generator is provided
Number and modulated signal frequency-doubled signal, through processing extract timesharing obtain once, second harmonic signal.
11. (711), analog-digital converter (304) will once, second harmonic signal digitlization.
12. (712), core processor (301) receive once, the data of second harmonic signal, processing obtain through light path
On the concentration for surveying gas.
13. (713), judging whether to have monitored the gas of all kinds, execution (714) has not such as been monitored, has such as been monitored
Perform (715).
14. (714), another gas concentration of core processor control conversion monitoring, repeats the gas of (707) to (712)
Measurement of concetration process.
15. (715), judging whether to complete all angle scannings, (716) are performed as unfinished, have such as completed to perform
(717)。
16. (716), embodiment 1：Core processor (301) control head (307) drives lasing light emitter (306) and laser
Receiver rotates an angle；Embodiment 2：Core processor (301) control multi-channel data selector (121) selection lasing light emitter
(306) path, then corresponding lasing light emitter is driven, then by splicer (315), light path selector switch (316), by another angle
Collimater (317) launches laser.Repeat the process that (702) are monitored to (712) ranging and gas concentration.
17. (717), core processor processing (301) institute angled upper acquisition distance and each gas concentration, obtain difference
Each gas concentration data of distance areas and three-dimensional spatial area
18. (718), core processor processing (301) uploads data by communication interface (311), and passes through display screen
(312) display data.
Claims (13)
1. a kind of mine self caused fire monitoring early-warning system, it is characterised in that：System mainly includes gas concentration sensoring, temperature
Spend monitoring device, extinguishing device, netscape messaging server Netscape, warning device and communication network；Gas concentration sensoring is mainly wrapped
Include generating laser, laser pickoff, control process unit and display unit；Gas concentration sensoring uses open air chamber,
Remote sensing monitoring can be carried out to multiple gases concentration in the environment of goaf；Gas concentration sensoring has laser ranging function；Letter
Breath processing server is responsible for processing gas concentration data and temperature data, when Monitoring Data meets alert if, then passes through alarm
Unit sends sound and light alarm, sends fire alarm information by communication network, and put out a fire by extinguishing device.
2. monitoring early-warning system as claimed in claim 1, it is characterised in that：The gas concentration sensoring of system is using following
Method carries out the gas concentration monitoring in different distance region：Device launches two beam laser of different directions in same point, to difference
The pip A and B of distance are measured；If the distance for measuring pip A is LA, gas mean concentration is MA, measure pip B
Distance be LB, gas mean concentration is MB, then the gas concentration of A points to B point distance areas is available
Approximate representation.
3. monitoring early-warning system as claimed in claim 1, it is characterised in that：The gas concentration sensoring of system is using following
Scanning monitoring method is scanned monitoring：The laser beam of the laser transmitter projects different directions of gas concentration sensoring is carried out
Gas concentration and the data sequence constituted apart from monitoring, acquisition gas concentration, distance and the direction of the launch, obtain difference after processing
The gas concentration of distance areas.
4. monitoring early-warning system as claimed in claim 1, it is characterised in that：The laser hair of the gas concentration sensoring of system
Emitter use can automatically adjust the generating laser of the direction of the launch, and control process unit controls Laser emission to scan monitoring mode
The device direction of the launch, carries out different directions gas concentration and apart from monitoring.
5. monitoring early-warning system as claimed in claim 1, it is characterised in that：The laser hair of the gas concentration sensoring of system
Emitter use can automatically adjust the generating laser of the direction of the launch, and control process unit controls Laser emission to scan monitoring mode
The device direction of the launch, carries out different directions gas concentration and apart from monitoring.
6. monitoring early-warning system as claimed in claim 1, it is characterised in that：The laser hair of the gas concentration sensoring of system
Emitter produces laser by lasing light emitter, and a lasing light emitter can produce the laser for detecting multiple gases.
7. monitoring early-warning system as claimed in claim 1, it is characterised in that：The gas concentration sensoring of system is using following
Method carries out the gas concentration monitoring of three-dimensional spatial area：Gas concentration sensoring launches the laser of different directions in same point
Beam is measured to the pip of different distance, obtains distance of the launch point away from each pip；Using launch point as reference point, to anti-
Exit point distance and Laser emission bearing data are handled, and obtain the coordinate data of each pip, according to all reflection point coordinates
Data, obtain three-dimensional space model, by the gas concentration and three-dimensional space model phase in the different distance region obtained by computing
Correspondence, obtains the gas concentration of three-dimensional spatial area.
8. monitoring early-warning system as claimed in claim 1, it is characterised in that：The laser hair of the gas concentration sensoring of system
Emitter lasing light emitter uses semiconductor laser with tunable；The controlled processing unit control of semiconductor laser with tunable, sends not
The laser of co-wavelength；Laser pickoff receives the laser reflected, and laser signal is converted into electric signal, control process unit
Electric signal is handled, corresponding gas concentration is obtained.
9. monitoring early-warning system as claimed in claim 1, it is characterised in that：The laser hair of the gas concentration sensoring of system
Emitter can send CH4、CO、CO2、O2、C2H2And C2H4The laser of the different wave length of molecule absorption peak value.
10. monitoring early-warning system as claimed in claim 1, it is characterised in that：The equipment in explosion environment is arranged in system
It is explosion-proof type equipment.
11. monitoring early-warning system as claimed in claim 1, it is characterised in that：The device for detecting temperature of system is passed including optical fiber
Sensor, radio temperature sensor, thermal infrared imager, infrared thermoelectricity are released or infrared radiation thermometer.
12. monitoring early-warning system as claimed in claim 1, it is characterised in that：The extinguishing device of system includes grouting equipment.
13. monitoring early-warning system as claimed in claim 1, it is characterised in that：The extinguishing device of system sprays including inert gas
Jet device.
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| CN201610919937.8A CN107246281B (en) | 2016-10-21 | 2016-10-21 | Monitoring and early warning system for fire in mine |
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| CN201610919937.8A CN107246281B (en) | 2016-10-21 | 2016-10-21 | Monitoring and early warning system for fire in mine |
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| CN107246281B CN107246281B (en) | 2019-12-10 |
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| CN201610919937.8A Active CN107246281B (en) | 2016-10-21 | 2016-10-21 | Monitoring and early warning system for fire in mine |
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| CN111322104A (en) * | 2020-02-26 | 2020-06-23 | 河南理工大学 | Intelligent fire extinguishing device for underground roadway |
| CN113605983A (en) * | 2021-08-20 | 2021-11-05 | 中国矿业大学(北京) | Coal mine goaf high-temperature detection early warning and fire prevention and extinguishing intelligent cooperative management and control system |
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