CN106640195B - Mine explosion monitoring and alarming system - Google Patents
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Abstract
The invention discloses a mine explosion monitoring and alarming system. The system mainly comprises an information processing server, an alarm device, a communication network, a gas concentration monitoring device and various environment monitoring devices; the system can monitor the change of various data such as smoke, temperature and the like caused by gas explosion, monitor the concentration of the marker gas through the gas concentration monitoring device, provide explosion alarm information for production management personnel for mine explosion according to the monitored data, and provide technical support for timely taking emergency treatment measures, reducing casualties and reducing loss caused by mine explosion. The monitoring alarm system overcomes the defects of slow reaction, high false alarm rate, high missing report rate and the like of gas monitoring and other methods adopted by the traditional explosion monitoring, greatly improves the alarm accuracy and provides important guarantee for the safety production of coal mines.
Description
Technical Field
The invention relates to a mine explosion monitoring and alarming system, which relates to the fields of sensor technology, laser technology, spectral analysis technology, signal processing technology and the like.
Background
Coal is the main energy source in China and accounts for about 70% of primary energy. The coal industry is a high-risk industry, and accidents such as gas, fire, a roof, coal dust and the like puzzle the safe production of a coal mine. The number of deaths caused by serious accidents in coal mines in China is 66.5 percent, and the number of deaths caused by mine fire, gas coal dust explosion accidents and carbon monoxide poisoning suffocation is as high as 80 percent. If accurate alarm can be realized in the early stage of mine explosion and effective measures are taken, the key point for reducing casualties is realized. The existing method for preventing and treating mine explosion accidents mainly monitors underground gas concentration, but the gas concentration is over-limit and is only one of necessary conditions for causing mine explosion, if other conditions for mine explosion are not met, explosion can not be caused even if the gas concentration is over-limit, and because a methane sensor is arranged near an explosive site, direct damage is easily caused when explosion occurs, and data can not be collected, so that the traditional gas monitoring alarm mode cannot accurately early warn before the mine explosion occurs and cannot accurately alarm after the explosion occurs. Besides a gas monitoring method, a mine explosion monitoring method based on characteristics of smoke, temperature, vibration and the like is also applied, but the monitoring data and the monitoring method are still single, so that the alarm accuracy is not ideal. Therefore, a new mine explosion monitoring and alarming system is needed to meet the requirement of coal mine safety production.
Disclosure of Invention
The invention aims to provide a mine explosion monitoring and alarming system which can monitor changes of partial gas concentration, wind speed, wind direction, sound, smoke, temperature, air pressure, vibration, sound and light caused by gas explosion and alarm the gas explosion according to data obtained by monitoring. The system mainly comprises a gas concentration monitoring device, a micro-seismic monitoring device, an air pressure monitoring device, an explosion sound monitoring device, a fireball monitoring device, a temperature monitoring device, a wind speed monitoring device, a wind direction monitoring device, a smoke monitoring device, an information processing server, an alarm device and a communication network; the information processing server is responsible for collecting, processing and storing all monitoring data, when monitoring that gas concentration data, microseismic data, air pressure data, sound data, fireball monitoring data, temperature data, wind speed data, wind direction data and smoke monitoring data are abnormal and device faults meet alarm conditions, the information processing server sends out sound-light alarm through the alarm device, and sends out explosion alarm information through a communication network.
1. The system further comprises: the gas concentration monitoring device of the system is a gas concentration remote sensing device; the gas concentration remote sensing device mainly comprises a laser transmitter, a laser receiver, a control processing unit and a display unit; the gas concentration remote sensing device adopts an open gas chamber, and can carry out remote sensing monitoring on the concentration of various gases in the environment; the gas concentration remote sensing device has a laser ranging function.
2. The system further comprises: the gas concentration remote sensing device of the system monitors the gas concentration of different distance areas by adopting the following method: the device emits two beams of laser in different directions at the same point, and measures reflection points A and B at different distances; setting the distance of the measured reflection point A as LAAverage concentration of gas being MAMeasuring the distance L from the reflection point BBAverage concentration of gas being MBThen the gas concentration in the distance region from point A to point B is available
Approximately represented.
3. The system further comprises: the gas concentration remote sensing device adopts the following scanning monitoring method to carry out scanning monitoring: a laser transmitter of the gas concentration remote sensing device transmits laser beams in different directions to monitor gas concentration and distance, a data sequence consisting of the gas concentration, the distance and the transmitting direction is obtained, and the gas concentration in different distance areas is obtained after processing.
4. The system further comprises: the laser transmitter of the gas concentration remote sensing device adopts a laser transmitter capable of automatically adjusting the transmitting direction, and the control processing unit controls the transmitting direction of the laser transmitter in a scanning monitoring mode to monitor the gas concentration and the distance in different directions.
5. The system further comprises: the laser transmitter of the gas concentration remote sensing device generates laser through laser sources, and one laser source can generate laser for detecting various gases.
6. The system further comprises: the laser transmitter of the gas concentration remote sensing device generates laser light by a laser source, and the laser transmitter comprises a plurality of laser sources, and each laser source is used for generating laser light for detecting one gas.
7. The system further comprises: the gas concentration remote sensing device monitors the gas concentration of the three-dimensional space region by adopting the following method: the gas concentration remote sensing device emits laser beams in different directions at the same point to measure reflection points in different distances, and the distance between the emission point and each reflection point is obtained; and processing the distance of the reflection points and the data of the laser emission direction by taking the emission points as reference points to obtain the coordinate data of each reflection point, obtaining a three-dimensional space model according to the coordinate data of all the reflection points, and corresponding the gas concentrations of different distance areas obtained by calculation to the three-dimensional space model to obtain the gas concentration of the three-dimensional space area.
8. The system further comprises: a laser emitter laser source of the gas concentration remote sensing device adopts a tunable semiconductor laser; the tunable semiconductor laser is controlled by the control processing unit and emits laser with different wavelengths; the laser receiver receives the reflected laser, converts the laser signal into an electric signal, and controls the processing unit to process the electric signal to obtain the corresponding gas concentration.
9. The system further comprises: laser emitter of gas concentration remote sensing device capable of emitting CO and CO2、O2、CH4And NOXThe molecules absorb laser light of different wavelengths of the peak.
10. The system further comprises: the fireball monitoring apparatus of the system includes a video surveillance device.
11. The system further comprises: the fireball monitoring device of the system includes an infrared monitoring device.
12. The system further comprises: the fireball monitoring device of the system includes an ultraviolet monitoring apparatus.
13. The system further comprises: the smoke monitoring apparatus of the system comprises a video monitoring device.
14. The system further comprises: the smoke monitoring means of the system comprises a smoke sensor.
15. The system further comprises: the wind direction monitoring device and the wind speed monitoring device of the system comprise an integrated ultrasonic wind direction and wind speed sensor.
16. The system further comprises: the devices arranged in the explosive environment in the system are all explosion-proof devices.
Drawings
Fig. 1 is a schematic diagram of a mine explosion monitoring and alarming system.
Fig. 2 is a flow chart of the working process of the mine explosion monitoring and alarming system.
FIG. 3 is a schematic diagram of the gas concentration remote sensing device in the embodiment 1.
FIG. 4 is a schematic diagram of the gas concentration remote sensing device embodiment 2.
FIG. 5 is a schematic diagram showing an arrangement structure of a collimator in embodiment 2 of the gas concentration remote sensing device.
FIG. 6 is a schematic diagram of concentration monitoring in a three-dimensional space region of a gas concentration remote sensing device.
FIG. 7 is a flow chart of the operation of the gas concentration remote sensing device.
Detailed Description
Fig. 1 is a schematic diagram of a mine explosion monitoring and alarming system, which comprises:
1. information processing server (1): the monitoring device is used for storing data of each sensor, monitoring gas concentration data, microseismic data, air pressure data, sound data, fireball monitoring data, temperature data, wind speed data, wind direction data, smoke monitoring data change and device faults, and sending out alarm signals by analyzing data change and fault information.
2. Alarm device (2): the information processing server is controlled to give out sound and light alarm and is connected and communicated with the information processing server through an RS232 interface.
3. Monitoring device (3): the system provides data query and production monitoring services for production managers, provides field data by the information processing server, and has the functions of alarm display and GIS service.
4. Core switch (4): the communication network equipment is in charge of management and data exchange of all equipment accessed to the mining Ethernet and is connected with the underground switch (5) through optical fibers, and the communication network equipment comprises a core switch (4), the underground switch (5) and a data substation (6).
5. Downhole switch (5): and the system is responsible for the access and data exchange of the data substations and is connected with each underground switch in a ring network mode through optical fibers.
6. Data substation (6): the monitoring device is responsible for the access and the data exchange of each monitoring device and is connected with the underground switch (5) through optical fibers.
7. Gas concentration monitoring device (7): the gas concentration remote sensing device is adopted, the open air chamber is adopted, the remote sensing monitoring can be carried out on the concentration of various gases in the environment, and the laser ranging function is achieved.
8. Microseismic monitoring device (8): the vibration sensor is in charge of acquiring vibration signals, digitalizing the signals, transmitting the digitalized data to the data substation (6), and can adopt a BOSCH digital triaxial acceleration sensor BMA250, and the SPI interface output is connected with the data substation (6) through an RS485 module.
9. Air pressure monitoring device (9): the pressure sensor is used for monitoring roadway differential pressure and acquiring air pressure data, a GPD10 coal mine negative pressure sensor can be adopted, and the pressure sensor is connected with a data substation (6) through an RS485 interface module.
10. Explosion sound monitoring device (10): the system is used for collecting monitoring sound data, when explosion sound is monitored, a switching signal is output to the data substation (6), a sound sensor mainly comprising an LM393 and an electret microphone can be adopted, and the trigger sensitivity can be adjusted to monitor the explosion sound.
11. Fireball monitoring device (11): the device is used for monitoring the fireball generated by explosion, can acquire video images through a camera, can also acquire images through an infrared imager or an ultraviolet imager, and identifies the images through a video image identification device. A Haikang DS-2CD8313PF-E25 infrared thermal imaging network camera with an intelligent identification function can be adopted.
12. Temperature monitoring device (12): the system is used for monitoring the temperature of an explosive area, and can adopt a non-contact infrared temperature instrument DT8012B to be connected with a data substation (6) through an RS485 interface module.
13. Wind speed monitoring device (13): a mechanical wind speed sensor or an integrated ultrasonic wind speed and direction sensor can be adopted, wind speed and wind direction are obtained through the time difference of cross ultrasonic waves, and a wind direction monitoring device (13) is directly integrated. An HS-FSSB01 integrated ultrasonic wind speed and direction sensor can be adopted and is connected with the data substation (6) through an RS485 interface module.
14. Wind direction monitoring device (14): a mechanical wind direction sensor can be adopted, and an integrated ultrasonic wind speed and wind direction sensor can also be adopted.
15. Smoke monitoring device (15): the smog sensor is used for monitoring smog generated by fire disasters, can adopt a traditional ion type or photoelectric type smog sensor, also can recognize smog through videos, can adopt a smog intelligent recognition module of Chongqing Haipu to carry out video smog recognition on video images collected by a camera, and is connected with a substation (6) through a network interface.
Fig. 2 is a working flow chart of the mine explosion monitoring and alarming system:
(201) each monitoring device collects gas concentration data, microseismic data, air pressure data, sound data, fireball monitoring data, temperature data, wind speed data, wind direction data and smoke monitoring data. The microseismic monitoring device (8), the air pressure monitoring device (9), the explosion sound monitoring device (10), the temperature monitoring device (12), the wind speed monitoring device (13) and the wind direction monitoring device (14) transmit the acquired data to the data substation (6); the fireball monitoring device (11) and the smoke monitoring device (15) directly send data to the mining Ethernet for transmission.
And 2, (202) the data substation (6) receives data of the microseismic monitoring device (8), the air pressure monitoring device (9), the explosion sound monitoring device (10), the temperature monitoring device (12), the wind speed monitoring device (13) and the wind direction monitoring device (14), and packages the data regularly and transmits the data to the mining Ethernet for transmission.
And 3, (203) the underground switch (5) transmits the data transmitted by the data substations and the data directly transmitted by the fireball monitoring device (11) and the smoke monitoring device (15) to the core switch (4) on the well.
(204) the core switch (4) transmitting the data to the information processing server
(205) the information processing server (1) stores data of each sensor, monitors changes of gas concentration data, microseismic data, air pressure data, sound data, fireball monitoring data, temperature data, wind speed data, wind direction data and smoke monitoring data, judges working states of each monitoring device through a timer, and controls the alarm device (2) and the monitoring equipment (3) to send out alarm signals through an RS232 interface if alarm conditions are met by analyzing data changes and fault information. The data abnormality comprises gas concentration data CO and CO of explosive areas2、O2、CH4And NOXCO and CO in2、NOXThe concentration rise value exceeds the set threshold value in the set time interval, O2Or CH4The method comprises the steps that a concentration reduction value exceeds a set threshold value within a set time interval, a microseismic data integral value exceeds the set threshold value within the set time interval, an air pressure data rise value exceeds the set threshold value within the set time interval, a plosive is monitored, a fireball is monitored within the set time interval, a temperature data rise value exceeds the set threshold value within the set time interval, an air speed data rise value exceeds the set threshold value within the set time interval, the wind direction is reversed within the set time interval, smoke is monitored within the set time interval, a sensor is in fault, and when the sum of the number of abnormal items of data and the number of faults of the sensor exceeds the set threshold value, the explosion is judged to occur. Each monitoring threshold is obtained according to the measurement setting of the site environment or the manual setting.
And 6, (206) the alarm device (2) receives the alarm control signal transmitted by the information processing server (1) through the RS232 interface and gives out sound and light alarm.
(207) the monitoring equipment (3) receives an alarm signal transmitted by the information processing server (1) through the mining Ethernet, and the explosion position is displayed through a computer display screen.
Fig. 3 is a schematic diagram of a gas concentration remote sensing device according to the principle of embodiment 1, which mainly comprises a laser transmitter, a laser receiver, a control processing unit and a display unit. The control processing unit is responsible for controlling the laser emitter to emit laser; processing the signal returned by the laser receiver to obtain the gas concentration and the reflector distance; controlling the communication interface to communicate; controlling the display screen to display; and receiving an operation signal of the key and carrying out corresponding processing. A core processor (301), a signal generator (302), a phase-locked loop amplifier (303), an analog-to-digital converter (304), a digital phase detector (305) and other auxiliary components; the laser emitter is responsible for the emission of laser signals for ranging and gas monitoring and comprises a laser source (306) and a holder (307); the laser receiver is responsible for receiving laser signals and converting the laser signals into electric signals, and the laser receiver specifically comprises a receiving lens (308), a darkroom (309) and a photoelectric detector (310); a communication interface (311) for monitoring data transmission; the display unit is mainly used for displaying the gas concentration and the working state data of the device and is a display screen (312). The main elements include:
1. the core processor (301) adopts a Samsung S3C2440 processor, and the S3C2440 is a microprocessor based on an ARM920T kernel; S3C2440 has 3 UART interfaces, 2 SPI interfaces, 2 USB interfaces and 1 IIC-BUS interface; and the embedded Linux platform is used for realizing drive control communication.
2. The signal generator (302) is responsible for generating a modulated sawtooth wave control signal for controlling the emission of the laser transmitter for monitoring the gas concentration and a reference signal for signal analysis, and comprises a DDS generator, a filter circuit, an adder and the like.
3. The phase-locked loop amplifier (303) adopts two modules which are respectively responsible for extracting the first harmonic and the second harmonic of a gas absorption signal, utilizes the irrelevance between the signal and the noise to inhibit the noise and improve the signal-to-noise ratio, and can adopt an LIA-MV-150 phase-locked amplifier module.
4. The analog-to-digital converter (304) is responsible for converting the primary and secondary analog signals demodulated by the phase-locked amplifier into digital signals, and an ADS 836416 bit multi-channel A/D converter chip with 6 fully differential input channels can be adopted.
5. And the digital phase discriminator (305) is responsible for processing the received ranging signals, comparing the received signals with the sending control signals to obtain the phase difference between the signals, and transmitting the phase difference to the core processor through the interface in a data mode.
6. The laser source (306) adopts a tunable semiconductor laser which can emit laser with various wavelengths and is used for measuring different gas concentrations, and can adopt an IBSG-TO5TEC series tunable semiconductor laser which integrates a TEC current temperature control semiconductor element and is used for adjusting temperature and stabilizing laser wavelength and power.
7. And the holder (307) is used for controlling the transmitting direction of the tunable semiconductor laser (311) and the receiving direction of the laser receiver, the motion of the holder can be controlled by an MAX485 chip externally connected with the SPI communication port of the core processor through a holder control protocol, and the holder adopts a standard monitoring holder for a camera and can rotate in the horizontal and vertical directions.
8. And the receiving lens (308) is responsible for focusing the reflected laser light to the photoelectric detector.
9. A darkroom (309) adopting a closed cylinder structure, and the inner wall of the darkroom is coated with light absorbing materials.
10. The photoelectric detector (310) is responsible for converting the received laser signal into an electric signal and comprises a light receiving element and an amplifying circuit; the light receiving element adopts an InGaAs PIN photodiode, the main element of the amplifying circuit adopts AD603, and the two voltage followers which are connected in parallel are respectively connected with a phase-locked loop amplifier (307) and a digital phase discriminator (309).
11. And the communication interface (311) comprises a wired communication interface and a wireless communication interface, wherein the main chip of the wired communication interface adopts DM9000, the DM9000 is a fully integrated single-chip Ethernet MAC controller, and the network protocol of the upper layer is supported by the built-in Linux drive of the core processor. The DM9000 supports 10/100M self-adaptation and supports 3.3V and 5V power supply voltages. The DM9000 is connected with an RJ45 network interface through a network isolation transformer interface chip YL18-1080S, so that the physical connection of a network is communicated; the wireless communication interface adopts a Wifi wireless network card of a standard USB interface, and network communication service is realized under the support of a system, a USB interface driver and a Wifi wireless network card driver.
12. And the display screen (312) adopts a 3.5-inch color LCD screen, has the resolution of 480x800 and is driven by a self-contained display driver of Linux.
13. And the key (313) is used for setting and controlling parameters and functions of the gas concentration remote sensing device, and comprises function keys for determining, returning, moving up, moving down and the like.
Fig. 4 is a schematic diagram of the gas concentration remote sensing device according to embodiment 2. One difference between the embodiment 2 and the embodiment 1 is that a plurality of different tunable semiconductor lasers controlled by a multiplexer (314) are used for emitting laser with different wavelengths, and the laser needs to be emitted through a light combiner (315), an optical path selector and a collimator; another difference is that embodiment 2 has no pan/tilt, but uses 8 collimators, each of which points in a different direction, and the 8 collimators (317) are connected to the optical router (316), and the optical router (316) is controlled by the core processor (301) to route the laser emitted from the optical combiner (315), and emit the laser from a selected path of collimator (317), thereby realizing multiplexing. The elements involved are as follows:
1. the multi-channel data selector (314) is responsible for gating between the signal generator (305) and the multi-channel tunable semiconductor laser, and can adopt a CD4051BC bidirectional analog switch, wherein 3I/O ports of the core processor (302) control the gating, and 1I/O port controls the switch; the COMMON IN/OUT port is connected with a signal generator (305), and 4 IN/OUT ports are respectively connected with different tunable semiconductor lasers (311).
2. The laser source (306) adopts a tunable semiconductor laser, can emit laser with certain absorption peak wavelength of monitored gas, adopts tunable semiconductor lasers with different wavelengths for different gases, can adopt a SAF117XS series butterfly-shaped tunable semiconductor laser, and integrates a TEC current temperature control semiconductor element.
3. The light combiner (315) adopts an optical fiber wave combiner to combine laser with different wavelengths into one beam, and each tunable semiconductor laser of the device adopts time-sharing emission, so that the output end only outputs laser with one wavelength at most at any time.
4. The optical router (316) can use a Visspace 1000OSS optical routing device, and the routing communication is controlled by the core processor (302) through a serial port.
5. And the collimator (317) controls the laser to emit directionally to form a light beam in space, and an FC interface fiber laser collimation lens is adopted.
Fig. 5 is a schematic diagram of an arrangement structure of a collimator in embodiment 2 of the gas concentration remote sensing device.
FIG. 6 is a schematic diagram of the concentration monitoring of the three-dimensional space region of the gas concentration remote sensing device. Setting the device to emit 8 beams of laser, respectively reflecting at A, B, C, D, E, F, G, H points, establishing a three-dimensional coordinate system by taking the position of the device as a coordinate origin, knowing that the included angle between the laser projection straight line OA and the XOY plane is alpha and the included angle between the laser projection straight line OA and the YOZ plane is beta, then reflecting the coordinate A of the point A
Similarly, coordinates of other points can be obtained, and a three-dimensional space model as shown in fig. 6 can be established according to the coordinate points. The gas concentration measured by each reflection point in the scanning monitoring process is respectively MA、MB、MC、MD、ME、MF、MG、MHThe K point is any point in the space model, and the intersection points of the plane which passes through the K point and is vertical to the Y axis and AB, DC, EF and HG are respectively KAB、KDC、KEF、KHGThe coordinates thereof are respectively (x)AB,yAB,zAB)、(xDC,yDC,zDC)、(xEF,yEF,zEF)、(xHG,yHG,zHG) Then K isABGas concentration of a spot
KDCGas concentration of a spot
KEFPoint of qiBody concentration
KHGGas concentration of a spot
A line parallel to the Z axis passing through the point K and KAB KDCAnd KEF KHGRespectively has a cross point of KABCDAnd KEFGHThe X-axis coordinate thereof is XKABCDAnd xKEFGHTo obtain KABCDGas concentration of a spot
And KEFGHGas concentration of a spot
Further obtaining the reference concentration of the K point
The gas concentrations at all points in the three-dimensional spatial region can be obtained by the above example algorithm.
The working flow of the gas concentration remote sensing device is shown in FIG. 7:
(701) the core processor (301) periodically starts a monitoring scan process.
(702), first perform laser ranging, the core processor (301) controls the signal generator (302) to generate a 10M sine wave signal.
(703) driving a laser source (306) to emit laser light for detecting the distance with the sine wave signal. The sine wave signal in the embodiment 1 directly drives the tunable semiconductor laser, and in the embodiment 2, the sine wave signal needs to pass through a multi-path data selector (314) to select a channel, then drives the corresponding tunable semiconductor laser, passes through an optical combiner (315) and an optical path router (316), and is emitted out of laser by a collimator (317) at a corresponding angle.
(704), the ranging laser meets the reflector and part of the laser is reflected, the receiving lens (308) collects the reflected laser and focuses the laser to the photoelectric detector (310), and the photoelectric detector converts the received laser signal into an electric signal.
(705), the digital phase detector (305) processes the received ranging electrical signal, obtains the phase difference with the sending control signal after amplification, mixing and other processing, and transmits the phase difference to the core processor through the interface in a data mode.
(706), the core processor (301) receives the phase difference data and obtains a distance between the device and the reflector based on the phase difference.
(707), the core processor (301) controls the signal generator to emit a 50Hz sawtooth signal and modulate with a 50kHz sinusoidal signal.
(708) driving a laser source (306) with the modulated sawtooth signal to emit laser light sweeping a certain gas absorption peak wavelength range. Embodiment 1 a sine wave signal directly drives a tunable semiconductor laser; in embodiment 2, the sine wave signal needs to pass through a multi-channel data selector (123) to select a corresponding gas channel, then drives a corresponding tunable semiconductor laser, passes through a light combiner (315) and an optical path router (316), and is emitted out of laser by a corresponding collimator (317).
(709), the laser beam is reflected when the air passing through the measured area meets a reflector, the receiving lens (308) collects the reflected laser beam and focuses the laser beam to the photoelectric detector (310), and the photoelectric detector converts the received laser beam signal into an electric signal.
(710), the phase-locked loop amplifier (303) receives the electrical signal, time-divides the modulation signal provided by the signal generator and the frequency-multiplied signal of the modulation signal, and processes and extracts the time-divided primary and secondary harmonic signals.
(711) the analog-to-digital converter (304) digitizes the first and second harmonic signals.
(712), the core processor (301) receives the data of the first and second harmonic signals and processes the data to obtain the concentration of the measured gas on the optical path.
(713), determine if all types of gases have been monitored, e.g., not monitored for execution (714), e.g., monitored for execution (715).
(714) the core processor controls the switching to monitor another gas concentration and repeats (707) through (712) the gas concentration measurement process.
(715), determine if all angle scans are complete, such as not complete execution (716), such as completed execution (717).
(716), embodiment 1: the core processor (301) controls the holder (307) to drive the laser source (306) and the laser receiver to rotate for an angle; embodiment 2: the core processor (301) controls the multi-path data selector (121) to select the laser source (306) channel, then drives the corresponding laser source, and emits laser through the light combiner (315) and the optical path routing device (316) and the collimator (317) at another angle. The process of ranging and gas concentration monitoring is repeated 702-712.
(717) the core processor processes (301) the distances and gas concentrations obtained at all angles to obtain gas concentration data for different distance regions and three-dimensional spatial regions
(718), the core processor processing (301) uploading the data through the communication interface (311) and displaying the data through the display screen (312).
Claims (13)
1. A mine explosion monitoring alarm system is characterized in that: the system mainly comprises a gas concentration monitoring device, a micro-seismic monitoring device, an air pressure monitoring device, an explosion sound monitoring device, a fireball monitoring device, a temperature monitoring device, a wind speed monitoring device, a wind direction monitoring device, a smoke monitoring device, an information processing server, an alarm device and a communication network; the information processing server is responsible for collecting, processing and storing all monitoring data, when the abnormity of gas concentration data, microseismic data, air pressure data, sound data, fireball monitoring data, temperature data, wind speed data, wind direction data and smoke monitoring data and the failure of the device meet the alarm condition, the alarm device sends out sound and light alarm, and simultaneously sends out explosion alarm information through the communication network;
the gas concentration monitoring device of the system is a gas concentration remote sensing device and is used for obtaining gas concentration data of different distance areas and three-dimensional space areas; the gas concentration remote sensing device mainly comprises a laser transmitter and a laserThe device comprises an optical receiver, a control processing unit and a display unit; the gas concentration remote sensing device adopts an open gas chamber, and can carry out remote sensing monitoring on the concentration of various gases in the environment; the gas detected by the gas concentration remote sensing device comprises CO and CO2、O2、CH4And NOX(ii) a The gas concentration remote sensing device has a laser ranging function; the gas concentration remote sensing device adopts a single laser source or a plurality of laser sources to realize the concentration detection of various gases;
the gas concentration remote sensing device adopts the following scanning monitoring method to carry out scanning monitoring: a laser transmitter of the gas concentration remote sensing device transmits laser beams in different directions to monitor the gas concentration and the distance, a data sequence consisting of the gas concentration, the distance and the transmitting direction is obtained, and the gas concentrations in different distance areas are obtained after processing;
the laser transmitter of the gas concentration remote sensing device of the system adopts a laser transmitter capable of automatically adjusting the transmitting direction, and the control processing unit controls the transmitting direction of the laser transmitter in a scanning monitoring mode to monitor the gas concentration and the distance in different directions;
the gas concentration remote sensing device of the system monitors the gas concentration of the three-dimensional space region by adopting the following method: the gas concentration remote sensing device emits laser beams in different directions at the same point to measure reflection points in different distances, and the distance between the emission point and each reflection point is obtained; and processing the distance of the reflection points and the data of the laser emission direction by taking the emission points as reference points to obtain the coordinate data of each reflection point, obtaining a three-dimensional space model according to the coordinate data of all the reflection points, and corresponding the gas concentrations of different distance areas obtained by calculation to the three-dimensional space model to obtain the gas concentration of the three-dimensional space area.
2. The monitoring and alarm system of claim 1, wherein: the gas concentration remote sensing device of the system monitors the gas concentration of different distance areas by adopting the following method: the device emits two beams of laser in different directions at the same point, and measures reflection points A and B at different distances; setting the distance of the measured reflection point A as LAAverage concentration of gas being MAMeasuring the distance L from the reflection point BBAverage concentration of gas being MBThen the gas concentration in the distance region from point A to point B is available
Approximately represented.
3. The monitoring and alarm system of claim 1, wherein: the laser transmitter of the gas concentration remote sensing device generates laser through laser sources, and one laser source can generate laser for detecting various gases.
4. The monitoring and alarm system of claim 1, wherein: the laser transmitter of the gas concentration remote sensing device generates laser light by a laser source, and the laser transmitter comprises a plurality of laser sources, and each laser source is used for generating laser light for detecting one gas.
5. The monitoring and alarm system of claim 1, wherein: a laser emitter laser source of the gas concentration remote sensing device adopts a tunable semiconductor laser; the tunable semiconductor laser is controlled by the control processing unit and emits laser with different wavelengths; the laser receiver receives the reflected laser, converts the laser signal into an electric signal, and controls the processing unit to process the electric signal to obtain the corresponding gas concentration.
6. The monitoring and alarm system of claim 1, wherein: laser emitter of gas concentration remote sensing device capable of emitting CO and CO2、O2、CH4And NOXThe molecules absorb laser light of different wavelengths of the peak.
7. The monitoring and alarm system of claim 1, wherein: the fireball monitoring apparatus of the system includes a video surveillance device.
8. The monitoring and alarm system of claim 1, wherein: the fireball monitoring device of the system includes an infrared monitoring device.
9. The monitoring and alarm system of claim 1, wherein: the fireball monitoring device of the system includes an ultraviolet monitoring apparatus.
10. The monitoring and alarm system of claim 1, wherein: the smoke monitoring apparatus of the system comprises a video monitoring device.
11. The monitoring and alarm system of claim 1, wherein: the smoke monitoring means of the system comprises a smoke sensor.
12. The monitoring and alarm system of claim 1, wherein: the wind direction monitoring device and the wind speed monitoring device of the system comprise an integrated ultrasonic wind direction and wind speed sensor.
13. The monitoring and alarm system of claim 1, wherein: the devices arranged in the explosive environment in the system are all explosion-proof devices.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107489455B (en) * | 2017-08-19 | 2019-08-20 | 中国矿业大学 | A kind of processing unit and method of laser gas remote sensing signal |
| CN108131166B (en) * | 2018-02-23 | 2023-04-14 | 中国矿业大学(北京) | Mine explosion monitoring alarm system based on image |
| CN108071423B (en) * | 2018-02-23 | 2023-04-14 | 中国矿业大学(北京) | Mine explosion monitoring system based on infrared image monitoring equipment |
| CN108071422B (en) * | 2018-02-23 | 2023-04-14 | 中国矿业大学(北京) | Mine explosion monitoring system based on image monitoring equipment |
| CN108590763B (en) * | 2018-02-23 | 2023-04-14 | 中国矿业大学(北京) | Mine explosion monitoring and alarming system based on infrared image |
| CN110513138B (en) * | 2019-09-24 | 2020-11-24 | 中煤科工集团重庆研究院有限公司 | Linkage control method of gas coal dust explosion suppression device in underground coal mine stope area |
| CN111614755B (en) * | 2020-05-20 | 2021-01-05 | 梅州市悦思智能科技有限公司 | Environment intelligent management system based on Internet of things |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3733300A1 (en) * | 1987-10-02 | 1989-04-20 | Bergwerksverband Gmbh | Combined display, control and monitoring unit for underground |
| CN1676881A (en) * | 2005-05-20 | 2005-10-05 | 中国科学院计算技术研究所 | Sensor network based underground safety monitoring system, apparatus and method |
| CN101070763A (en) * | 2007-06-14 | 2007-11-14 | 赵凤济 | Visible wireless commanding device for mine rescure |
| CN101532396A (en) * | 2009-01-20 | 2009-09-16 | 樊铁山 | Coal mine safety monitoring system connected with explosion impact air-pressure explosion-protection sensors |
| CN102662175A (en) * | 2012-05-04 | 2012-09-12 | 山东华辰泰尔信息科技股份有限公司 | Laser radar device for measuring mine gas concentration distribution and working method thereof |
| CN103147796A (en) * | 2011-12-07 | 2013-06-12 | 西安扩力机电科技有限公司 | Ventilation monitoring system for gas explosion prevention |
| CN103400465A (en) * | 2013-08-15 | 2013-11-20 | 天津卓朗科技发展有限公司 | Multifunctional and highly integrated fire safety precaution emergency system device |
| CN103628921A (en) * | 2013-12-12 | 2014-03-12 | 中煤科工集团重庆研究院有限公司 | Low-concentration gas conveying safety monitoring system |
| CN104083841A (en) * | 2014-07-25 | 2014-10-08 | 电子科技大学 | Fire prevention and control system and method for mine and underground pipe network |
-
2016
- 2016-10-21 CN CN201610920065.7A patent/CN106640195B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3733300A1 (en) * | 1987-10-02 | 1989-04-20 | Bergwerksverband Gmbh | Combined display, control and monitoring unit for underground |
| CN1676881A (en) * | 2005-05-20 | 2005-10-05 | 中国科学院计算技术研究所 | Sensor network based underground safety monitoring system, apparatus and method |
| CN101070763A (en) * | 2007-06-14 | 2007-11-14 | 赵凤济 | Visible wireless commanding device for mine rescure |
| CN101532396A (en) * | 2009-01-20 | 2009-09-16 | 樊铁山 | Coal mine safety monitoring system connected with explosion impact air-pressure explosion-protection sensors |
| CN103147796A (en) * | 2011-12-07 | 2013-06-12 | 西安扩力机电科技有限公司 | Ventilation monitoring system for gas explosion prevention |
| CN102662175A (en) * | 2012-05-04 | 2012-09-12 | 山东华辰泰尔信息科技股份有限公司 | Laser radar device for measuring mine gas concentration distribution and working method thereof |
| CN103400465A (en) * | 2013-08-15 | 2013-11-20 | 天津卓朗科技发展有限公司 | Multifunctional and highly integrated fire safety precaution emergency system device |
| CN103628921A (en) * | 2013-12-12 | 2014-03-12 | 中煤科工集团重庆研究院有限公司 | Low-concentration gas conveying safety monitoring system |
| CN104083841A (en) * | 2014-07-25 | 2014-10-08 | 电子科技大学 | Fire prevention and control system and method for mine and underground pipe network |
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