CN106448020A - Exogenous mine fire monitoring alarm system - Google Patents
Exogenous mine fire monitoring alarm system Download PDFInfo
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
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- E—FIXED CONSTRUCTIONS
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- E21F17/18—Special adaptations of signalling or alarm devices
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- G01N21/39—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using tunable lasers
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- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
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- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions
- G08B17/125—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions by using a video camera to detect fire or smoke
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N2021/1793—Remote sensing
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Abstract
The invention discloses an exogenous mine fire monitoring alarm system. An exogenous mine fire has the characteristics of difficulty in discovery, rapid development and the like; and the traditional exogenous fire alarm system has long response and easily involves in error report and missing report, so that the fire cannot be controlled in time and casualties of a large amount of people are caused. The system mainly comprises an information processing server, an alarm device, a communication network, a gas concentration remote sensing device, a flame monitoring device and the like; the system can monitor the features of gas concentration and the like in a monitored regional environment via the gas concentration remote sensing device, and gives a fire alarm by comprehensive analysis on monitoring data of flame and the like. The system can accurately monitor exogenous fire feature gas, thereby greatly improving the alarm accuracy and providing an important guarantee for safety production of a coal mine.
Description
Technical field
The present invention relates to a kind of mine exogenous fire monitor and alarm system, this 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 includes breeding fire and exogenous fire, mine exopathogenic factor fire
Calamity has discovery hardly possible, develops the features such as swift and violent, fire extinguishing and rescue difficulty.Fire is once occur, if the intensity of a fire can not obtain in time
Control, involving scope will expand rapidly, cause a tremendous loss of lives, therefore find that mine exogenous fire has important meaning in time
Justice.The monitoring method of mine exogenous fire mainly adopts temperature monitoring and smoke monitoring etc. at present, and smoke monitoring has reaction slowly,
The shortcomings of rate of false alarm and rate of failing to report are high；Temperature monitoring method relatively advanced at present is using fiber optic Distributed Temperature monitoring, but light
Fibre haves such problems as that fragile, installation is complex, difficult in maintenance.It is thus desirable to new mine exogenous fire monitoring alarm system
System, to meet Safety of Coal Mine Production requirement.
Content of the invention
Present invention aim at providing a kind of mine exogenous fire monitor and alarm system, can remote sensing monitoring relatively far range
Symbolic gas CO, CO of fire in flame, temperature data change and the lane space region that interior roadway fire causes2、O2、CH4
And NOXConcentration change, carry out fire alarm by analyzing the Monitoring Data that obtains.It is distant that described system mainly includes gas concentration
Induction device, device for detecting temperature, flame monitoring apparatus, netscape messaging server Netscape, alarm device and communication network；Gas concentration is distant
Induction device mainly includes generating laser, laser pickoff, control process unit and display unit；Gas concentration sensoring is adopted
With open air chamber, remote sensing monitoring can be carried out to multiple gases concentration in environment；Gas concentration sensoring has laser ranging work(
Energy；Netscape messaging server Netscape is responsible for processing gas concentration data, ambient temperature data and flame monitoring data, when Monitoring Data is full
Sufficient alert if, then send sound and light alarm by alarm unit, sends fire alarm information by communication network.
1. described in, system further includes：The gas concentration sensoring of system carries out different distance area using following methods
The gas concentration monitoring in domain：Device launches two bundle laser of different directions in same point, and pip A and B of different distance is entered
Row measurement；If the distance recording pip A is LA, gas mean concentration is MA, the distance recording pip B is LB, gas is average
Concentration is MB, then the gas concentration of A point to B point distance areas is availableApproximate representation.
2. described in, system further includes：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 distance prison
Survey, obtain the data sequence of gas concentration, distance and direction of the launch composition, the gas obtaining different distance region after treatment is dense
Degree.
3. described in, system further includes：The generating laser of the gas concentration sensoring of system is using can automatically adjust
The generating laser of the direction of the launch, control process unit controls laser transmitter projects direction to scan monitoring mode, carries out not
Equidirectional gas concentration and distance monitoring.
4. described in, system further includes：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.
5. described in, system further includes：The generating laser of the gas concentration sensoring of system is produced by lasing light emitter
Laser, generating laser includes multiple lasing light emitters, and each lasing light emitter is used for producing a kind of laser of gas of detection.
6. described in, system further includes：The gas concentration sensoring of system carries out three dimensions area using following methods
The gas concentration monitoring in domain：Gas concentration sensoring launches the reflection to different distance for the laser beam of different directions in same point
Point measures, and obtains the distance away from each pip for the launch point；With launch point as reference point, to pip distance and Laser emission
Bearing data is processed, and obtains the coordinate data of each pip, according to all reflection point coordinate data, obtains three dimensions mould
Type, will be corresponding with three-dimensional space model for the gas concentration in the different distance region being obtained by computing, obtains three dimensions area
The gas concentration in domain.
7. described in, system further includes：The generating laser of the gas concentration sensoring of system is partly led using tunable
Body laser；The controlled processing unit of semiconductor laser with tunable controls, and sends the laser of different wave length；Laser pickoff connects
Receive the laser reflecting, laser signal is converted to the signal of telecommunication, the control process cell processing signal of telecommunication, obtains corresponding gas
Concentration.
8. described in, system further includes：The generating laser of the gas concentration sensoring of system can send CO, CO2、
O2、CH4And NOXThe laser of the different wave length of molecule absorption peak value.
9. described in, system further includes：The equipment being arranged in system in explosion environment is explosion-proof type equipment.
10. described in, system further includes：The flame monitoring apparatus of system include video surveillance devices.
Described in 11., system further includes：The flame monitoring apparatus of system include infrared observation equipment.
Described in 12., system further includes：The flame monitoring apparatus of system include ultraviolet monitor function equipment.
Described in 13., system further includes：The device for detecting temperature of system includes Fibre Optical Sensor, temperature sensor, red
Outer thermal imaging system, infrared thermoelectricity are released or infrared radiation thermometer.
Brief description
Fig. 1 mine exogenous fire monitor and alarm system composition schematic diagram.
Fig. 2 mine exogenous fire monitor and alarm system workflow diagram.
Fig. 3 gas concentration sensoring embodiment 1 principle schematic.
Fig. 4 gas concentration sensoring embodiment 2 principle schematic.
Fig. 5 gas concentration sensoring embodiment 2 collimator arrangement architecture schematic diagram.
Fig. 6 gas concentration sensoring three-dimensional spatial area concentration monitor schematic diagram.
Fig. 7 gas concentration sensoring workflow diagram.
Specific embodiment
Fig. 1 is mine exogenous fire monitor and alarm system composition schematic diagram, and described system composition includes：
1. netscape messaging server Netscape (1)：Be responsible for each sensing data is stored, and monitor gas concentration data, temperature
Degrees of data and the data variation of flame monitoring data, send fire alarm signal by analytical data change.
2. alarm device (2)：Controlled by netscape messaging server Netscape and send sound and light alarm, pass through with netscape messaging server Netscape
RS232 interface connection communication.
3. monitoring device (3)：There is provided data query and production monitoring service for producing management personnel, by information processing services
Device provides field data, has alarm and shows and GIS service function.
4. core switch (4)：The management data being responsible for all equipment accessing mining Ethernet exchanges, and hands over down-hole
Change planes (5) connected by optical fiber.Communication network device includes core switch (4), down-hole switch (5) and substation (6).
5. down-hole switch (5)：The access data of responsible data substation exchanges, by optical fiber and each down-hole switch with
Looped network mode connects.
6. substation (6)：The access data being responsible for each monitoring device exchanges, and has network switch function, hands over down-hole
Change planes and connected by optical fiber；There is RS485 interface.
7. gas concentration monitoring device (7)：Using gas concentration sensoring, using open air chamber, can wrap in environment
Include CO, CO2、O2、CH4And NOXMultiple gases concentration carry out remote sensing monitoring, there is laser ranging function, there is three dimensions area
Domain gas concentration monitoring function.
8. device for detecting temperature (8)：Fibre Optical Sensor, radio temperature sensor, thermal infrared imager, infrared thermoelectricity can be adopted
Release or infrared radiation thermometer in any one equipment.Fibre Optical Sensor can adopt U.S. DTS Sequence distribution formula Fibre Optical Sensor, leads to
Cross network interface and connect substation；Radio temperature sensor can adopt wireless sensor network equipment, star-like connected mode, by coordinating
Device node device connects substation (6) by RS485 interface；Thermal infrared imager can be using the Haikang DS- with intelligent recognition function
2CD8313PF-E25 infrared thermal imaging web camera, directly connects substation (6) by network interface；Can adopt digital red
Outer thermoelectricity releases alarm, connects substation (6) by RS485 interface module；Infrared radiation thermometer can adopt non-contact infrared temperature
Instrument DT8012B, connects substation (6) by RS485 interface module.
9. flame monitoring apparatus (9)：For monitoring the flame of fire generation, camera acquisition video image can be passed through, by
Video image identification equipment identifies flame, can adopt Chengdu century Chaoyang Science and Technology Ltd. intelligent image type fire detector,
Substation (6) is connected by network interface；Infrared or ultraviolet monitoring equipment may also be employed, such as U.S.'s enlightening wound X3301 infra red flame prison
Survey instrument, X2200 ultraviolet flame monitor, substation (6) is connected by RS485 interface.
Fig. 2 is mine exogenous fire monitor and alarm system workflow diagram：
1. the gas concentration collecting data, ambient temperature data, wind direction Monitoring Data are passed by (201) each monitoring device
Give substation (6).
2. each Monitoring Data that (202) substation (6) receives, forwards the data to down-hole switch (5).
3. the Monitoring Data that data substation transmits is transferred to the core switch on well by (203) down-hole switch (5)
(4).
4. (204) core switch (4) transfers data to netscape messaging server Netscape.
5. (205) netscape messaging server Netscape stores to each sensing data, and analytical data change, such as data variation
Meet alert and if then alarm signal is sent by RS232 Interface Controller alarm device (2) and monitoring device (3).Data exception
Including CO, CO in specific monitored area2、NOXIn setting time interval, concentration lift-off value exceedes given threshold, O2、CH4Setting
Concentration decreasing value in being spaced of fixing time exceedes given threshold (every kind of gas concentration abnormal abnormal as an independent data)；Temperature
Degrees of data lift-off value in setting time is spaced exceedes given threshold；Monitor flame；When data exception item quantity exceedes setting
Threshold value, then be judged to fire.Each monitoring threshold measures to set or be manually set according to site environment and obtains.
6. (206) alarm device (2) receive information processing server (1) is believed by the controlling alarm that RS232 interface transmits
Number, send sound and light alarm.
7. the alarm signal that (207) monitoring device (3) receive information processing server (1) is transmitted by core switch (4)
Number, fire location is shown by computer display screen.
Fig. 3 is specific embodiment 1 principle schematic of gas concentration sensoring, mainly includes generating laser, swashs
Optical receiver, control process unit and display unit.Control process unit is responsible for controlling laser transmitter projects laser；Process and swash
The signal that optical receiver returns obtains gas concentration and reverberation distance；Communication interface is controlled to be communicated；Control display screen shows
Show；Receive the operation signal of button and processed accordingly.Core processor (301), signal generator (302), phaselocked loop
Amplifier (303), analog-digital converter (304), digital phase discriminator (305) and other auxiliary element；Range finding is responsible for by generating laser
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, laser signal is converted to the signal of telecommunication, and concrete composition includes receiving lens (308), darkroom (309) and photodetector
(310)；Communication interface (311) is used for Monitoring Data and transmits；Display unit is responsible for gas concentration and is shown with working state of device data
The main element showing is display screen (312).Main element includes：
1. core processor (301), using Samsung S3C2440 processor, S3C2440 is micro- based on ARM920T kernel
Processor,；S3C2440 has 3 UART interface, 2 SPI interface, 2 USB interface, 1 IIC-BUS interface；Using embedded
Formula Linux platform realizes drive control communication.
2. signal generator (302), are responsible for producing for controlling laser transmitter projects to be used for the tune of gas concentration monitoring
Sawtooth wave control signal processed and the reference signal of signal analysis, including multiple portion such as DDS generator, filter circuit, adder
Point.
3. phaselocked loop amplifier (303), using two modules, be each responsible for extracting gas absorption signal once, secondary
Harmonic wave, suppresses noise using the orthogonal property of signal and noise, improves signal to noise ratio, mutually can be amplified using LIA-MV-150 lock
Device module.
4. analog-digital converter (304), be responsible for by lock-in amplifier demodulate once, secondary analogue signal be converted into numeral
Signal, can adopt 16 multi-channel a/d converter chips of ADS8364, have 6 fully differential input channels.
5. digital phase discriminator (305), the distance measuring signal that responsible process receives, receipt signal is entered with sending control signal
Row compares, and obtains the phase contrast between signal, and phase contrast is sent to core processor with data mode by interface.
6. lasing light emitter (306), using semiconductor laser with tunable, can send the laser of multi-wavelength, for measurement not
Same gas concentration, can be integrated using IBSG-TO5TEC series semiconductor laser with tunable, this semiconductor laser with tunable
TEC current temperature controls 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 of laser pickoff
Debit to, can by the external MAX485 chip in core processor SPI communication port pass through cradle head control protocol integrated test system head move, cloud
Platform, using video camera standard supervision head, can both horizontally and vertically rotated.
8. receiving lens (308), the laser being responsible for will reflect back into is assembled to photodetector.
9. darkroom (309), using airtight cylindrical structure, inwall applies light absorbent.
10. photodetector (310), are responsible for the laser signal receiving being converted to the signal of telecommunication, including light receiving element
And amplifying circuit；Light receiving element adopts InGaAs PIN photodiode, and amplifying circuit main element adopts AD603, in parallel
Two voltage followers connect phaselocked loop amplifier (307) and digital phase discriminator (309) respectively.
11. communication interfaces (311), including wired communication interface and wireless communication interface, the main core of wired communication interface
Piece adopts 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 of device drives and supports.DM9000 supports 10/100M self adaptation, supports the supply voltage of 3.3V and 5V.DM9000 leads to
Cross network isolation transformer interface chip YL18-1080S and connect RJ45 network interface, realize the physical connection of network is led to
Letter；Wireless communication interface adopts the Wifi wireless network card of standard USB interface, and in system, USB port drives and Wifi wireless network card drives
Dynamic program realizes network communication services under supporting.
12. display screens (312), using 3.5 cun of color LCD screens, resolution 480x800, carry display by Linux and drive journey
Sequence drives.
13. buttons (313), set for gas concentration sensoring parameter and function and control, include determining, return,
Upper shifting, the function key such as move down.
Fig. 4 is specific embodiment 2 principle schematic of gas concentration sensoring.Embodiment 2 and embodiment 1
One difference is, using the multiple different semiconductor laser with tunable being controlled by multi-channel data selector (314), to be used for
The laser of transmitting different wave length, laser need to be launched by splicer (315) and light path selector and collimator；Another area
It is not that embodiment 2 does not have head, and adopts 8 collimators, each collimator points to different directions, 8 collimators
(317) connect light selector switch (316), splicer (315) is sent by the control of core processor (301) by light selector switch (316)
Laser carry out routing, by laser from select certain road collimator (317) send, thus realize time division multiplexed multiplexing.Involved
Element as follows：
1. multi-channel data selector (314), between responsible signal generator (305) and multichannel semiconductor laser with tunable
Gating, CD4051BC bilateral analog switch can be adopted, control gating, 1 I/O by 3 I/O mouths of core processor (302)
Mouth controlling switch；COMMON IN/OUT mouth is connected with signal generator (305), and 4 IN/OUT mouths 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 adopts the semiconductor laser with tunable of different wave length, can be using SAF117XS Series Belleville tunable half
Conductor semiconductor laser with tunable, this semiconductor laser with tunable integrated TEC current temperature controls semiconductor element.
3. splicer (315), will be a branch of for the Laser synthesizing of different wave length using optical fiber wave multiplexer, this equipment each tunable half
Conductor laser adopts time division emission, so the laser output of outfan most also only one of which wavelength at any time.
4. smooth selector switch (316) can adopt Vispace 1000 OSS light routing device, is passed through by core processor (302)
Serial ports controls routing connection.
5. collimator (317), the light beam controlling laser orientation transmitting and being formed in space, is swashed using FC Interface Fiber
Light collimating lenses.
Fig. 5 is gas concentration sensoring embodiment 2 collimator arrangement architecture schematic diagram.
Fig. 6 is gas concentration sensoring three-dimensional spatial area concentration monitor schematic diagram.If device transmitting 8 bundle laser, point
Do not reflected in A, B, C, D, E, F, G, H point, set up three-dimensional system of coordinate with device position for zero it is known that laser
Projection straight line OA is α with the angle of XOY plane, and the angle with YOZ plane is β, then pip A coordinate (xA,yA,zA) beThe coordinate of other each points can be obtained in the same manner, three-dimensional space as shown in Figure 6 can be set up according to coordinate points
Between model.During scanning monitoring, M is respectively by the gas concentration that each pip recordsA、MB、MC、MD、ME、MF、MG、MH, K point is
Any point within shown spatial model, is respectively K perpendicular to the plane of Y-axis with AB, DC, EF, HG intersection point by K pointAB、KDC、
KEF、KHG, its coordinate respectively (xAB,yAB,zAB)、(xDC,yDC,zDC)、(xEF,yEF,zEF)、(xHG,yHG,zHG), then KABThe gas of point
ConcentrationKDCThe gas concentration of pointKEFPoint
Gas concentrationKHGThe gas concentration of point
By K point parallel to the straight line of Z axis and KABKDCAnd KEFKHGIntersection point be respectively KABCDAnd KEFGH, its X-axis coordinate is respectively
xKABCDAnd xKEFGH, obtain KABCDThe gas concentration of pointAnd KEFGH
The gas concentration of pointAnd then obtain the reference concentration of K pointBe can get in three-dimensional spatial area by above example algorithm
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), carry out laser ranging first, core processor (301) control signal generator (302) is just producing 10M
String ripple signal.
3. (703), sine wave signal drives lasing light emitter (306) to send the laser for detection range.Embodiment 1 is sinusoidal
Ripple signal directly drives semiconductor laser with tunable, and embodiment 2 sine wave signal need to be through multi-channel data selector (314)
Behind selection path, then drive corresponding semiconductor laser with tunable, then through splicer (315), light path selector switch (316),
Laser is launched by the collimator (317) of respective angles.
4. (704), range laser runs into reverberation fraction of laser light and is reflected, and receiving lens (308) collection reflects
Laser is assembled to photodetector (310), and the laser signal receiving is converted to the signal of telecommunication by photodetector.
5. the range finding signal of telecommunication that (705), digital phase discriminator (305) process receives, after amplified, mixing etc. is processed, obtains
Obtain and send the phase contrast between control signal, phase contrast sends core processor with data mode to by interface.
6. (706), core processor (301) receiving phase difference data, obtains between equipment and reverberation according to phase contrast
Distance.
7. (707), core processor (301) control signal generator sends the sawtooth signal of 50Hz and with 50kHz's
Sinusoidal signal is modulated.
8. (708), modulated sawtooth signal drives lasing light emitter (306) to send inswept a certain kind GAS ABSORPTION peak value ripple
The laser of long scope.Embodiment 1 sine wave signal directly drives semiconductor laser with tunable；Embodiment 2 sine wave is believed
Number need to select, behind corresponding gas passage, then drive corresponding tunable semiconductor laser through multi-channel data selector (123)
Device, then through splicer (315), light path selector switch (316), laser is launched by corresponding collimator (317).
9. (709), laser passes through the air of tested region to run into reverberation fraction of laser light and is reflected, receiving lens (308)
Collect the laser reflecting to assemble to photodetector (310), the laser signal receiving is converted to electricity by photodetector
Signal.
10. (710), phaselocked loop amplifier (303) receives the signal of telecommunication, and the modulation letter that timesharing receipt signal generator provides
Number and modulated signal frequency-doubled signal, treated extraction timesharing obtain once, second harmonic signal.
11. (711), analog-digital converter (304) will once, second harmonic signal digitized.
12. (712), core processor (301) receives once, the data of second harmonic signal, processes and obtains institute through light path
On surveyed gas concentration.
13. (713), judge whether to have monitored the gas of all kinds, such as do not monitored execution (714), such as monitored
Execution (715).
14. (714), core processor controls another kind of gas concentration of conversion monitoring, repeats the gas of (707) to (712)
Measurement of concetration process.
15. (715), judge whether to complete all angle scannings, execute (716) as unfinished, such as complete to execute
(717).
16. (716), embodiment 1：Core processor (301) controls head (307) to drive lasing light emitter (306) and laser
Receptor rotates an angle；Embodiment 2：Core processor (301) controls multi-channel data selector (121) to select lasing light emitter
(306) path, then drive corresponding lasing light emitter, then through splicer (315), light path selector switch (316), by another angle
Collimator (317) launches laser.Repeat (702) to (712) range finding and the process of gas concentration monitoring.
17. (717), core processor process (301) institute the distance of angled upper acquisition and each gas concentration, obtain difference
Distance areas and each gas concentration data of three-dimensional spatial area
18. (718), core processor processes (301) and uploads data by communication interface (311), and passes through display screen
(312) video data.
Claims (14)
1. a kind of mine exogenous fire monitor and alarm system it is characterised in that：System mainly includes gas concentration sensoring, temperature
Degree monitoring device, flame monitoring apparatus, netscape messaging server Netscape, alarm device and communication network；Gas concentration sensoring master
Generating laser to be included, 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 environment；Gas concentration sensoring has laser ranging function；At information
Reason server is responsible for processing gas concentration data, ambient temperature data and flame monitoring data, when Monitoring Data meets alarm bar
Part, then send sound and light alarm by alarm unit, sends fire alarm information by communication network.
2. monitor and alarm system as claimed in claim 1 it is characterised in that：The gas concentration sensoring of system adopts following
Method carries out the gas concentration monitoring in different distance region：Device launches two bundle laser of different directions in same point, to difference
Pip A and B of distance measures；If the distance recording pip A is LA, gas mean concentration is MA, record pip B
Distance be LB, gas mean concentration is MB, then the gas concentration of A point to B point distance areas is available
Approximate representation.
3. monitor and alarm system as claimed in claim 1 it is characterised in that：The gas concentration sensoring of system adopts 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 distance monitoring, obtain the data sequence of gas concentration, distance and direction of the launch composition, obtain difference after treatment
The gas concentration of distance areas.
4. monitor and alarm system as claimed in claim 1 it is characterised in that：The laser of the gas concentration sensoring of system is sent out
Using the generating laser that can automatically adjust the direction of the launch, control process unit controls Laser emission to scan monitoring mode to emitter
The device direction of the launch, carries out different directions gas concentration and distance monitoring.
5. monitor and alarm system as claimed in claim 1 it is characterised in that：The laser of the gas concentration sensoring of system is sent out
Emitter produces laser by lasing light emitter, and a lasing light emitter can produce the laser for detecting multiple gases.
6. monitor and alarm system as claimed in claim 1 it is characterised in that：The laser of the gas concentration sensoring of system is sent out
Emitter produces laser by lasing light emitter, and generating laser includes multiple lasing light emitters, and each lasing light emitter is used for producing a kind of gas of detection
The laser of body.
7. monitor and alarm system as claimed in claim 1 it is characterised in that：The gas concentration sensoring of system adopts 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
Bundle measures to the pip of different distance, obtains the distance away from each pip for the launch point；With launch point as reference point, to anti-
Exit point distance and Laser emission bearing data are processed, and obtain the coordinate data of each pip, according to all reflection point coordinates
Data, obtains three-dimensional space model, by the gas concentration in the different distance region obtaining by computing and three-dimensional space model phase
Corresponding, obtain the gas concentration of three-dimensional spatial area.
8. monitor and alarm system as claimed in claim 1 it is characterised in that：The laser of the gas concentration sensoring of system is sent out
Emitter lasing light emitter adopts semiconductor laser with tunable；The controlled processing unit of semiconductor laser with tunable controls, and sends not
The laser of co-wavelength；The laser that laser pickoff reception reflects, laser signal is converted to the signal of telecommunication, control process unit
Process the signal of telecommunication, obtain corresponding gas concentration.
9. monitor and alarm system as claimed in claim 1 it is characterised in that：The laser of the gas concentration sensoring of system is sent out
Emitter can send CO, CO2、O2、CH4And NOXThe laser of the different wave length of molecule absorption peak value.
10. monitor and alarm system as claimed in claim 1 it is characterised in that：It is arranged on the equipment in explosion environment in system
It is explosion-proof type equipment.
11. monitor and alarm systems as claimed in claim 1 it is characterised in that：The flame monitoring apparatus of system include video prison
Depending on equipment.
12. monitor and alarm systems as claimed in claim 1 it is characterised in that：The flame monitoring apparatus of system include infrared ray
Monitoring device.
13. monitor and alarm systems as claimed in claim 1 it is characterised in that：The flame monitoring apparatus of system include ultraviolet
Monitoring device.
14. monitor and alarm systems as claimed in claim 1 it is characterised in that：The device for detecting temperature of system includes optical fiber and passes
Sensor, temperature sensor, thermal infrared imager, infrared thermoelectricity are released or infrared radiation thermometer.
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| CN201610916836.5A CN106448020B (en) | 2016-10-21 | 2016-10-21 | Mine external fire monitoring and alarming system |
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