CN104533525B - Driving face in coal mine coal and gas prominent alarm method based on image - Google Patents
Driving face in coal mine coal and gas prominent alarm method based on image Download PDFInfo
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- CN104533525B CN104533525B CN201410799587.7A CN201410799587A CN104533525B CN 104533525 B CN104533525 B CN 104533525B CN 201410799587 A CN201410799587 A CN 201410799587A CN 104533525 B CN104533525 B CN 104533525B
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Abstract
The invention discloses a kind of driving face in coal mine coal and gas prominent alarm method based on image, this alarm method near driving face in coal mine relevant range by installing video camera, analysis vedio data change in real time and equipment working condition, it was found that data variation abnormal in monitor area, combined situation such as Information abnormity meets alert if, then sends coal and gas prominent alarm and fail secure signal.This alarm method has taken into full account the various features feature of driving face in coal mine coal and gas prominent, implement simple, the coal and gas prominent of driving face can relatively accurately be judged, coal and gas prominent can be prevented effectively from and trigger the accident such as gas explosion, it is to avoid or reduce because gas asphyxiation and gas explosion cause casualties.
Description
Technical field
The present invention relates to a kind of driving face in coal mine coal and gas prominent alarm method based on image, this method is related to
The field such as image procossing and communication.
Background technology
Coal is China's main energy sources, accounts for primary energy 70%.Coal industry is high risk industries, gas, floods, fire
The accidents such as calamity, top plate, coal dust annoying Safety of Coal Mine Production.China's coal-mine occurs in severe and great casualty, and majority is particularly serious watt
The number of casualties caused by this accident, gas accident is also proportion maximum in all coal mining accidents.Therefore, gas accident
Preventing and treating is particularly significant.
Gas accident includes the accidents such as gas explosion, coal and gas prominent, gas asphyxiation, gas combustion.To avoid or subtracting
Few coal and gas prominent accident occurs, there has been proposed a variety of coals or rock and gas outburst prevention treatment method, in Safety of Coal Mine Production
Played an important role in work.But the monitoring in real time of existing coal and gas prominent and forecasting procedure (including microseism, sound emission, electricity
Magnetic radiation, infra-red radiation etc.) rate of false alarm and rate of failing to report it is also higher, it is difficult to the need for meeting Safety of Coal Mine Production.
Coal and gas prominent easily occurs for the driving face of underground coal mine, if rapidly and accurately judging this in the very first time
The coal and gas prominent in region, can be prevented effectively from coal and gas prominent and trigger the accident such as gas explosion, it is to avoid or reduce due to watt
This asphyxia and gas explosion cause casualties.
The content of the invention
When coal and gas prominent situation occurs for driving face in coal mine, have substantial amounts of coal petrography and outwards gush out at a high speed, and
Bulk deposition is outwards gushed out in the most of region of working face by digging laneway, and may be to all kinds of electricity in the region
Sub- equipment and communication line cause to damage, while methane concentration increases rapidly；The present invention proposes a kind of base according to these features
In the driving face in coal mine coal and gas prominent alarm method of image, cardinal principle is, by camera acquisition video
The real-time analysis of image, finds the motion and accumulation of a large amount of coal petrographys abnormal in monitor area, with reference to the numerical value of methane transducer
Situation of change realizes that coal and gas prominent is alarmed.Specific method includes：
1. underground coal mine, in the digging laneway of driving face or on development machine, the one or both sides of digging laneway fork
Place video camera；The working condition of each road vedio data gathered, detection video camera and communication line is detected in real time, together
When monitoring near zone methane transducer numerical value change；Occur extremely when detecting setting regions in camera video image
When object accumulation or voluminous object high-speed motion, then it is determined as data exception；Near data exception is detected while monitoring
The methane concentration in region increases rapidly or reached alarming value, or data exception goes out in succession in a short time with relevant device failure
It is existing, then send coal and gas prominent alarm and fail secure signal, the whole non-intrinsically safe secured electrical equipment electricity of cut-out underground coal mine
Source, notice withdraws from coal mine underground operators.
2. camera installation locations are at the top of tunnel or height is more than 2 meters；Focal length of camera and exposure value are manually set,
And close the auto-focusing and automatic white balance function of video camera.
Do not hidden 3. camera supervised scope is domestic in the digging laneway of pair driving face or on development machine by development machine
The subregion of gear is set, under the conditions of camera operation is normal and video communication is normal, when detecting setting regions
Vedio data occur acute variation, and data variation is irrecoverable, while monitoring the methane concentration of near zone
Increase rapidly or reach alarming value, then send coal and gas prominent alarm and fail secure signal.
4. the video image of camera acquisition and background image in the digging laneway of pair driving face or on development machine
Setting regions carries out computing with difference algorithm；Segmentation of the binary conversion treatment realization to moving object is carried out to error image again；
When statistics there occurs the pixel count in the region of object movement more than threshold value and continue for some time, while monitoring area nearby
The methane concentration in domain increases rapidly or reached alarming value, then sends coal and gas prominent alarm and fail secure signal.
5. have when in the video image that the video camera for detecting digging laneway fork inlet side or return side placement is gathered
Voluminous object to tunnel away from working face direction high-speed motion, while monitoring that the methane concentration of near zone increases or reached rapidly
To alarming value, then coal and gas prominent alarm and fail secure signal are sent.
6. the video image of pair digging laneway fork inlet side or return side camera acquisition and this road Background preserved
As carrying out computing with difference algorithm；Segmentation of the binary conversion treatment realization to moving object is being carried out to error image；Work as statistics
It was found that the pixel count in the region of certain road objects in images movement exceedes dependent thresholds and continues increase, while monitoring area nearby
The methane concentration in domain increases rapidly or reached alarming value, then sends coal and gas prominent alarm and fail secure signal.
7. when detecting object that more than one piece original position in picture fixes all to tunnel away from working face direction high-speed motion,
Monitor that the methane concentration of near zone increases rapidly or reached alarming value simultaneously, then send coal and gas prominent alarm and power off
Block signal.
8. pair monitor area set and static background image in fixed object contour shape be configured in advance；Fortune
Computing is carried out to video image and the background image of preservation with difference algorithm；The error image obtained to computing is carried out at binaryzation
Reason realizes the segmentation to moving object；Count each fixed object contour shape region and there occurs the common factor in the region of object movement
Pixel count, when each common factor pixel count with each fixed object contour shape area pixel number ratio more than dependent thresholds, and continues to increase
Greatly, while monitoring that the methane concentration of near zone increases rapidly or reached alarming value, then send coal and gas prominent alarm and
Fail secure signal.
9. it can be completed using the internal or external digital signal processor of video camera in video acquisition front end to video image
Analysis and alarm, or be directly monitored, sent out when detecting object movement using with the video camera of mobile detection function
Go out mobile alarm signal, while monitor that the methane concentration of near zone increases rapidly or reached alarming value, then send coal with watt
This protrudes alarm and fail secure signal.
Brief description of the drawings
Fig. 1 driving face in coal mine video camera and methane transducer schematic view of the mounting position.
The system schematic of Fig. 2 embodiments 1.
The workflow schematic diagram that the video management of Fig. 3 embodiments 1 is alarmed with coal and gas prominent.
The system schematic of Fig. 4 embodiments 2.
The workflow schematic diagram that the video management of Fig. 5 embodiments 2 is alarmed with coal and gas prominent.
Fig. 6 digging laneways camera video image analyzes testing process schematic diagram.
The testing process schematic diagram of Fig. 7 digging laneways fork both sides camera video image.
The object that Fig. 8 detection more than one piece original positions are fixed all shows to testing process of the tunnel away from working face direction high-speed motion
It is intended to.
Embodiment
Video camera placement location is as shown in figure 1, specifically include：
1. in digging laneway (101).
2. in the tunnel of the side of digging laneway fork air-out (102).
3. in the tunnel of the side of digging laneway fork air intake (103).
4. driving face methane transducer (104).
5. digging laneway return methane transducer (105).
Embodiment 1：
System as shown in Figure 2 mainly includes：
1. video identification service device (201), video identification service device is responsible for the video image of each road video camera
Reason, alarm and fail secure signal are sent by analyze data change and fault message.
2. monitoring host computer (202)；With sound and light of alarm, production management personnel check live video by monitoring host computer
Image, the data variation of sensor and equipment fault, alarm and fail secure signal can be sent manually, and cut-out underground coal mine is whole
Non-intrinsically safe secured electrical device power supply (DPS), issues dispatch command and notifies to withdraw from coal mine underground operators.And can be from storage server
Transfer history monitoring data.
3. storage server (203)；It is responsible for adopting camera signal, each sensor signal and equipment fault signal
Collect, store, and provide the user inquiry and transfer service.
4. the network switch (204)；It is responsible for management and the data exchange of the equipment of all mining Ethernets of access.
5. underground interchanger (205)；It is responsible for access and the data exchange of substation, with flameproof enclosure, meets underground coal mine
Requirement of explosion proof.
6. substation (206)；It is responsible for access and the data exchange of video camera and sensor, with flameproof enclosure, meets colliery
Downhole anti-explosion requirement.
7. video camera (207)；Using digital network camera, equipped with the explosion-resistant enclosure for meeting coal mine explosion-proof requirement.
8. methane transducer (208)；Methane transducer is gamut or the dense methane transducer of height, and with automatic alarm
Function.
Video management and the course of work that coal and gas prominent is alarmed are as shown in Figure 3：
1. (301) camera acquisition video image, digitized video is simultaneously compressed, by netting twine by the vision signal after compression
It is transferred to substation.
2. (302) vision signal and sensor signal are transferred to underground interchanger by substation.
3. (303) network switch that underground interchanger is transferred signals on well, the network switch by vision signal and
Sensor signal is distributed to storage server, monitor terminal and video identification service device.
4. (304) video identification service device analyzes detection video image and equipment working condition in real time, when meeting alarm bar
During part, then alarm and fail secure signal are sent.
5. (305) the real-time displaying scene video of monitoring host computer, methane transducer data and equipment working condition, and receive and regard
Frequency recognizes server alarm signal, when meeting alert if, then automatic sound-light alarm；Production management personnel can check live real
When video, methane transducer data, alarm condition and equipment situation, when video and the hardware of data acquisition are damaged, then transfer
History live video and sensing data.Production management personnel can send alarm and fail secure signal manually, cut off coal mine
Lower whole non-intrinsically safe secured electrical device power supply (DPS)s, issue dispatch command and notify to withdraw from coal mine underground operators.
Embodiment 2：
System as shown in Figure 4 mainly includes：
1. storage server (401)；It is responsible for being acquired vision signal, alarm signal and equipment working condition, storing,
And provide the user inquiry and transfer service.
2. monitoring host computer (402)；With sound and light of alarm, production management personnel check live video by monitoring host computer
Image, alarm condition and equipment situation, alarm and fail secure signal, the whole non-intrinsically safe peaces of cut-out underground coal mine can be sent manually
Full electrical equipment power supply, issues dispatch command and notifies to withdraw from coal mine underground operators.And history can be transferred from storage server
Monitoring data.
3. monitor guest machine (403)；When monitoring host computer breaks down, it is operated by monitoring guest machine.
4. the network switch (404)；It is responsible for management and the data exchange of the equipment of all mining Ethernets of access.
5. underground interchanger (405)；It is responsible for access and the data exchange of substation, with flameproof enclosure, meets underground coal mine
Requirement of explosion proof.
6. substation (406)；It is responsible for access and the data exchange of video camera and sensor, with flameproof enclosure, meets colliery
Downhole anti-explosion requirement.
7. video identification warning device (407)；Primary processor selects dsp chip, to the analog video by camera acquisition
Signal is digitized and compression processing, by netting twine by the video signal transmission after compression to substation, while to video image
Analysis identification is carried out, the image change in setting area and object movement are can recognize that, when image change and object are moved to and set
During fixed alarming index, automatic output alarm signal.Video identification warning device is placed on a symbol jointly with video camera (408)
In the explosion-resistant enclosure for closing coal mine explosion-proof requirement.
8. video camera (408)；Using analog video camera, outputting standard analog video signal, with video identification warning device
(407) it is placed on jointly in an explosion-resistant enclosure for meeting coal mine explosion-proof requirement.
9. methane transducer (409)；Methane transducer is gamut or the dense methane transducer of height, and with automatic alarm
Function.
The video management of embodiment 2 and the course of work that coal and gas prominent is alarmed are as shown in Figure 5：
1. (501) camera acquisition video data, video identification warning device is transferred to by video analog signal, video is known
Other warning device digitized video is simultaneously compressed, and the vision signal after compression and mobile alarm signal are transferred into substation.
2. (502) video identification warning device carries out analysis identification to video image, the image in setting area can recognize that
Change and object movement, when image change and object are moved to the alarming index of setting, automatic output alarm signal is to dividing
Stand.
3. (503) various types of signal gathered is sent to underground interchanger by each substation by mining ethernet ring network.
4. (504) data that interchanger is forwarded under network switch received well, and by vision signal, sensor signal and report
Alert signal is distributed to storage server, monitoring host computer and backup host.
5. (505) storage server is stored vision signal, sensor signal and alarm signal.
6. (506) the real-time displaying scene video of monitoring host computer, sensing data, alarm condition and equipment working condition, when
When meeting alert if, then automatic sound-light alarm；Production management personnel can check live real-time video, alarm condition and equipment work
Make situation, history live video and data are then transferred when video and the hardware of data acquisition are damaged.Production management personnel can hand
It is dynamic to send coal and gas prominent alarm and fail secure signal, the whole non-intrinsically safe secured electrical device power supply (DPS)s of underground coal mine are cut off,
Dispatch command is issued to notify to withdraw from coal mine underground operators.
The testing process of digging laneway camera video image is as shown in Figure 6：
1. (601) being configured to the monitor area A in video monitoring range, transfer set during identification startup of server every time
Put area data.
2. standard compression video flowing (602) is reduced to picture frame.
The video image currently gathered is：
F={ f (x, y), x ∈ M, y ∈ N, MN }
Image resolution ratio is M × N, and (x, y) is the coordinate at video image any point, and f (x, y) is video image midpoint
The gray value of (x, y).
3. video image and the monitor area of background image (603) at interval of 5 frames pair carries out computing with difference algorithm,
Background image certain interval of time is updated automatically.
If background image is：
B={ b (x, y), x ∈ M, y ∈ N, MN }
Make current video image carry out calculus of differences with each respective pixel of background image, obtain difference image G：
Difference image after calculus of differences is：
G={ g (x, y), x ∈ M, y ∈ N, MN }
Operational formula is：
4. (604) carrying out segmentation of the binary conversion treatment realization to moving object to error image, realize to moving object
Segmentation；Grey scale change such as certain pixel exceedes given threshold T, then the gray value of this pixel is set as into 255, expression there occurs thing
The region of body movement, is otherwise 0, represents that the region of object movement does not occur.
Image expression formula after binaryzation is：
D={ d (x, y), x ∈ M, y ∈ N, MN }
Operational formula is：
5. (605) pixel in the region to there occurs object movement carries out numerical statistic, pixel count then enters more than threshold value L
Alert status (606)；
Statistical calculation formula is：
6. no video data stream output, then triggering alarm (609) (607) are such as detected under alert status；
7. (608) trigger alarm (609) if alert status continue to exceed threshold value L in 5 seconds；
8. (610) under alert status, the pixel count for such as detecting the region of object movement is less than threshold value L, then release pre-
Alert (611)；
(part expression formula is referred to the testing process of digging laneway fork both sides camera video image as shown in Figure 7
The explanation of figure 6 above)：
1. standard compression video flowing (701) is reduced to picture frame,.
2. computing, background image interval (702) are carried out with difference algorithm to video image and background image at interval of 5 frames
A period of time is updated.
3. segmentation of the binary conversion treatment realization to moving object (703) is carried out to error image.
4. (704) pixel count in the region to there occurs object movement is counted, enter if pixel count exceedes threshold value L1
Enter alert status (705)；
5. (706) under alert status, without triggering alarm in such as 10 seconds, then automatically terminate alert status (707).
6. no video data stream output, then triggering alarm (713) (708) are such as detected under alert status；
7. (709) under alert status, such as it is detected simultaneously by the pixel count in the region of two-path video objects in images movement
Whether persistently increase, counter adds 1 (711) if increase, otherwise counter O reset and return (710).
8. (712) such as counter represents to be detected simultaneously by the picture in the region of two-path video objects in images movement more than 12
Prime number continues to increase for 1 second, then triggering alarm (713)；
Detect the object of more than one piece original position fixation all to the implementation method such as Fig. 8 of tunnel away from working face direction high-speed motion
It is shown：
1. (801) the monitor area A in video monitoring range is configured, in identification server every time if having set
The area data set is transferred during startup.
2. (802) being configured to the fixed object contour shape in static background image, multiple objects profile can be set
Shape area B1~B2, transfer the contour shape data that fixed object has been set, contour shape picture during identification startup of server every time
Prime number is respectively s1~s2。
3. standard compression video flowing (803) is reduced to picture frame.
4. computing, background image interval (804) are carried out with difference algorithm to video image and background image at interval of 5 frames
A period of time is updated.
5. segmentation of the binary conversion treatment realization to moving object region (805) is carried out to error image.
6. (806) count each fixed object contour shape region and there occurs the common factor pixel count p in the region of object movement1
~p2。
7. (807) such as all piWith the pixel count s of the fixed object contour area setiRatio meet be more than R%,
Then enter alert status (808)；
Wherein i=1,2 ..., n
8. (809) under alert status, without triggering alarm in such as 10 seconds, then automatically terminate alert status (810).
9. no video data stream output, then triggering alarm (816) (811) are such as detected under alert status；
10. (812) under alert status, such as detect moving area in monitor area and persistently increase, then counter adds 1
(814), otherwise counter O reset and return (813).
11. (815) such as counter is more than 12, expression detects moving area in monitor area and continues to increase for 1 second, then triggers
Alarm (816).
Claims (6)
1. a kind of driving face in coal mine coal and gas prominent alarm method based on image, it is characterised in that：Underground coal mine,
In the digging laneway of driving face or on development machine, digging laneway fork one or both sides place video camera；Institute is detected in real time
The working condition of each road vedio data of collection, detection video camera and communication line, while monitoring the methane of near zone
The change of sensor values；Occur object accumulation or voluminous object extremely when detecting setting regions in camera video image
During high-speed motion, then it is determined as data exception；When detecting data exception while monitoring that the methane concentration of near zone is rapid
Increase or reach alarming value, or data exception occurs in succession in a short time with relevant device failure, then sends coal and dashed forward with gas
Go out alarm and fail secure signal, the whole non-intrinsically safe secured electrical device power supply (DPS)s of cut-out underground coal mine, notice withdraws from underground coal mine
Operating personnel；
Described alarm method is specifically included：
(1) it is domestic to camera supervised scope in the digging laneway of driving face or on development machine not blocked by development machine
Subregion is set, under the conditions of camera operation is normal and video communication is normal, when detecting regarding for setting regions
Acute variation occurs for frequency view data, and data variation is irrecoverable, while monitoring that the methane concentration of near zone is rapid
Increase or reach alarming value, then send coal and gas prominent alarm and fail secure signal；
(2) have largely when in the video image that the video camera for detecting digging laneway fork inlet side or return side placement is gathered
Object to tunnel away from working face direction high-speed motion, while monitoring that the methane concentration of near zone increases rapidly or reached report
Alert value, then send coal and gas prominent alarm and fail secure signal；
(3) when detecting the object of the fixation of the more than one piece original position in picture all to tunnel away from working face direction high-speed motion, together
When monitor that the methane concentration of near zone increases rapidly or reached alarming value, then send coal and gas prominent alarm and power-off close
Lock signal.
2. alarm method as claimed in claim 1, it is characterised in that：Camera installation locations are at the top of tunnel or height is big
In 2 meters；Focal length of camera and exposure value are manually set, and closes the auto-focusing and automatic white balance function of video camera.
3. alarm method as claimed in claim 1, it is characterised in that：In described step (1), to the driving of driving face
The setting regions of the video image of camera acquisition and background image carries out computing with difference algorithm in tunnel or on development machine；
Segmentation of the binary conversion treatment realization to moving object is carried out to error image again；When statistics there occurs the region of object movement
Pixel count exceed and threshold value and continue for some time, while monitoring that the methane concentration of near zone increases rapidly or reached alarm
Value, then send coal and gas prominent alarm and fail secure signal.
4. alarm method as claimed in claim 1, it is characterised in that：In described step (2), to digging laneway fork air intake
The video image of side or return side camera acquisition uses difference algorithm to carry out computing with this road background image preserved；To difference
It is worth image and carries out segmentation of the binary conversion treatment realization to moving object；When statistics finds the region of certain road objects in images movement
Pixel count exceedes dependent thresholds and continues increase, while monitoring that the methane concentration of near zone increases rapidly or reached alarm
Value, then send coal and gas prominent alarm and fail secure signal.
5. alarm method as claimed in claim 1, it is characterised in that：In described step (3), monitor area is set
It is configured in advance with the fixed object contour shape in static background image；With difference algorithm to video image and preservation
Background image carries out computing；The error image obtained to computing carries out segmentation of the binary conversion treatment realization to moving object；Statistics
Each fixed object contour shape region and there occurs object movement region common factor pixel count, when each common factor pixel count with it is each solid
Earnest body contour shape area pixel number ratio exceedes dependent thresholds, and continues increase, while monitoring the methane of near zone
Concentration increases rapidly or reached alarming value, then sends coal and gas prominent alarm and fail secure signal.
6. alarm method as claimed in claim 1, it is characterised in that：At the internal or external data signal of video camera
Manage device and the analysis and alarm to video image are completed in video acquisition front end, or directly using the shooting with mobile detection function
Machine is monitored, and mobile alarm signal is sent when detecting object movement, while monitoring that the methane concentration of near zone is fast
Speed increases or reached alarming value, then sends coal and gas prominent alarm and fail secure signal.
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| CN114673558B (en) * | 2022-04-12 | 2023-01-31 | 中国矿业大学 | Coal mine driving face risk identification and intelligent pre-control system and method |
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| CN101950035A (en) * | 2010-09-14 | 2011-01-19 | 北京安科兴业科技有限公司 | Rock burst and mine earthquake real-time monitoring system and method |
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| CN103726879A (en) * | 2013-12-26 | 2014-04-16 | 辽宁石油化工大学 | Method for utilizing camera to automatically capture mine earthquakes and collapses of mine and timely record and alarm |
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