CN104454011A - Coal face rock burst alarming method based on images - Google Patents
Coal face rock burst alarming method based on images Download PDFInfo
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- CN104454011A CN104454011A CN201410799590.9A CN201410799590A CN104454011A CN 104454011 A CN104454011 A CN 104454011A CN 201410799590 A CN201410799590 A CN 201410799590A CN 104454011 A CN104454011 A CN 104454011A
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- 239000003245 coal Substances 0.000 title claims abstract description 43
- 238000000034 method Methods 0.000 title claims abstract description 25
- 239000011435 rock Substances 0.000 title abstract description 6
- 238000009825 accumulation Methods 0.000 claims abstract description 6
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 78
- 238000012544 monitoring process Methods 0.000 claims description 28
- 230000033001 locomotion Effects 0.000 claims description 23
- 230000011218 segmentation Effects 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 238000004458 analytical method Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 5
- 230000001419 dependent effect Effects 0.000 claims description 4
- 238000004321 preservation Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 230000001154 acute effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims description 2
- 238000011897 real-time detection Methods 0.000 claims description 2
- 238000004880 explosion Methods 0.000 abstract description 12
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 238000007726 management method Methods 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000007906 compression Methods 0.000 description 7
- 238000012546 transfer Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 238000005065 mining Methods 0.000 description 4
- 230000008054 signal transmission Effects 0.000 description 3
- 206010003497 Asphyxia Diseases 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010223 real-time analysis Methods 0.000 description 2
- 238000006424 Flood reaction Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Alarm Systems (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention discloses a coal face rock burst alarming method based on images. According to the alarming method, cameras are installed at the positions nearby related areas of a coal face, the video image data change and the device working situation are analyzed in real time, the abnormal data change in the monitored area is found, and if the combination situation of information abnormity conforms to the alarming condition, a rock burst alarm signal is given out. According to the alarming method, various features of coal mine coal face rock burst are fully taken into consideration, implementation is easy, the rock burst of the coal face can be accurately judged, the rescue efficiency can be effectively improved, managers can take corresponding measures in time, gas explosion and other serious accidents caused by roadway blocking and gas accumulation are avoided, and casualties are avoided or reduced.
Description
Technical field
The present invention relates to a kind of coal-face bump alarm method based on image, the method relates to image procossing and the field such as to communicate.
Background technology
Coal is China's main energy sources, accounts for primary energy 70%.Coal industry is high risk industries, and the accidents such as gas, floods, fire, top board, coal dust annoying Safety of Coal Mine Production.In China's coal-mine generation severe and great casualty, majority is particularly serious gas accident, and the number of casualties that gas accident causes also is that in all coal mining accident, proportion is maximum.Therefore, gas accident control is very important.
Gas accident comprises the accidents such as gas explosion, bump, gas asphyxiation, gas combustion.Occur for avoiding or reducing bump accident, there has been proposed multiple coal or rock and gas outburst prevention treatment method, play an important role in Safety of Coal Mine Production work.But existing bump Real-Time Monitoring and forecasting procedure (comprising microseism, sound emission, electromagnetic radiation, infrared radiation etc.) rate of false alarm and rate of failing to report also higher, be difficult to the needs meeting Safety of Coal Mine Production.
Easily there is bump in the coal-face of underground coal mine, after bump occurs, easily causes the staff near work plane scene to be landfilled or stranded; Bump can cause the blocking in tunnel near work plane in addition, makes dash not smooth, makes methane accumulation, easily cause gas explosion.If judge the bump in this region rapidly and accurately in the very first time, rescue can be organized as early as possible, strive for valuable rescue time, avoid or reduce landfill or the stranded casualties caused; And in time establishment officer takes treatment measures to blocking tunnel, effectively avoid the accidents such as the gas explosion caused due to methane accumulation, avoid or reduce because gas asphyxiation and gas explosion cause casualties.
Summary of the invention
When coal-face generation bump situation, have a large amount of coal petrographys outwards to gush out at a high speed, and bulk deposition is in work plane major part region, is even outwards gushed out by air intake lane and return airway, may cause damage to each class of electronic devices in this region and communication line simultaneously; The present invention proposes a kind of coal-face bump alarm method based on image according to this feature, cardinal principle is, by the real-time analysis to camera acquisition video image, find motion and the accumulation of a large amount of coal petrographys abnormal in guarded region, the numerical value situation in conjunction with methane transducer realizes bump exactly and reports to the police.Concrete grammar comprises:
1. underground coal mine, on coal face hydraulic support or coal-winning machine, in coal-face air intake lane, places video camera in coal-face return airway; Each road vedio data that real-time detection gathers, detects the working condition of video camera and communication line, monitors the change of the methane transducer numerical value of near zone simultaneously; When detecting that in camera video image, object accumulation or voluminous object high-speed motion appear in setting regions extremely, be then judged to be data exception; When data exception being detected, or data exception and relevant device fault occur at short notice in succession, and the methane concentration simultaneously monitoring near zone is normal, then send bump and report to the police and signal.
2. camera installation locations is near top, tunnel or be highly greater than 2 meters; Manual setting focal length of camera and exposure value, and auto-focusing and the automatic white balance function of closing video camera.
3. domestic not set by the subregion that coal-winning machine and scraper plate block of camera supervised scope on pair coal face hydraulic support or coal-winning machine, at camera operation under the normal and normal condition of video communication, when the vedio data generation acute variation of setting regions being detected, and data variation is irrecoverable, the methane concentration simultaneously monitoring near zone is normal, then send bump alarm signal.
4. on pair coal face hydraulic support or coal-winning machine, the video image of camera acquisition and the setting regions of background image use difference algorithm to carry out computing; Again the segmentation of binary conversion treatment realization to moving object is carried out to error image; The pixel count that there occurs the region of object movement when statistics exceedes threshold value and continues for some time, and the methane concentration simultaneously monitoring near zone is normal, then send bump alarm signal.
5. when have in the video image of camera acquisition coal-face air intake lane and return airway being detected voluminous object to tunnel away from work plane direction high-speed motion time, the methane concentration simultaneously monitoring near zone is normal, then send bump alarm signal.
6. the video image of the camera acquisition of pair coal-face air intake lane and return airway and this road background image of preservation use difference algorithm to carry out computing; Error image is being carried out to the segmentation of binary conversion treatment realization to moving object; When statistics finds that the pixel count in the region of certain road objects in images movement all exceedes dependent thresholds and continues to increase, the methane concentration simultaneously monitoring near zone is normal, then send coal bump alarm signal.
7. when detect the fixing object of more than one piece original position in picture all to tunnel away from work plane direction high-speed motion, the methane concentration simultaneously monitoring near zone is normal, then send bump alarm signal.
8. pair guarded region sets and fixed object contour shape in static background image is arranged in advance; The background image of difference algorithm to video image and preservation is used to carry out computing; The segmentation of binary conversion treatment realization to moving object is carried out to the error image that computing obtains; Add up each fixed object contour shape region and the common factor pixel count in region that there occurs object movement, when each common factor pixel count and each fixed object contour shape area pixel number ratio exceed dependent thresholds, and continue to increase, the methane concentration simultaneously monitoring near zone is normal, then send bump alarm signal.
9. the internal or external digital signal processor of video camera can be utilized in video acquisition front end to complete analysis to video image and warning, or directly use the video camera with mobile detection function to monitor, mobile alarm signal is sent when detecting object and moving, the methane concentration simultaneously monitoring near zone is normal, then send bump alarm signal.
Accompanying drawing explanation
Fig. 1 coal-face video camera and methane transducer installation site schematic diagram.
Fig. 2 embodiment 1 system schematic.
The workflow schematic diagram that Fig. 3 embodiment 1 video management and bump are reported to the police.
Fig. 4 embodiment 2 system schematic.
The workflow schematic diagram that Fig. 5 embodiment 2 video management and bump are reported to the police.
Fig. 6 coal-face camera video image analyzes testing process schematic diagram.
The testing process schematic diagram of camera video image in Fig. 7 air intake lane and return airway.
Fig. 8 detect object that more than one piece original position fixes all to tunnel away from the testing process schematic diagram of work plane direction high-speed motion.
Detailed description of the invention
Video camera placement location as shown in Figure 1, specifically comprises:
1. video camera (101) on coal face hydraulic support or coal-winning machine.
2. video camera (102) in coal-face return airway.
3. video camera (103) in coal-face air intake lane.
4. coal-face upper corner methane transducer (104)
5. coal-face methane transducer (105)
6. coal-face air intake lane methane transducer (106)
7. coal-face return airway methane transducer (107)
8. series ventilation by the air intake lane of string work plane near point air port place methane transducer (108)
Embodiment 1:
System mainly comprises as shown in Figure 2:
1. video identification service device (201), video identification service device is responsible for processing the video image of each road video camera, sends warning and fail secure signal by analysis data variation and fault message.
2. monitoring host computer (202); There is sound and light of alarm, production management personnel check data variation and the equipment fault of live video image, sensor by monitoring host computer, manually can send warning and fail secure signal, cut off underground coal mine whole non-intrinsically safe secured electrical device power supply (DPS), issue dispatch command notice and withdraw from coal mine underground operators.And history monitor data can be transferred from storage server.
3. storage server (203); Be responsible for gathering camera signal, each sensor signal and equipment fault signal, storing, and provide inquiry to transfer service for user.
4. the network switch (204); Be responsible for management and the exchanges data of the equipment of the mining Ethernet of all accesses.
5. down-hole switch (205); Be responsible for access and the exchanges data of substation, there is flameproof enclosure, meet underground coal mine requirement of explosion proof.
6. substation (206); Be responsible for access and the exchanges data of video camera and sensor, there is flameproof enclosure, meet underground coal mine requirement of explosion proof.
7. video camera (207); Adopt digital network camera, be furnished with the explosion-resistant enclosure meeting coal mine explosion-proof requirement.
8. methane transducer (208); Methane transducer is gamut or the dense methane transducer of height, and has auto-alarm function.
The course of work that video management and bump are reported to the police is as shown in Figure 3:
1. (301) camera acquisition video image, digitized video is also compressed, by netting twine by compression after video signal transmission to substation.
2. (302) vision signal and methane transducer signal are transferred to down-hole switch by substation.
3. (303) down-hole switch transfers signals to the aboveground network switch, and vision signal and methane transducer signal are distributed to storage server by the network switch, monitor terminal and video identification service device.
4. the real-time analysis of (304) video identification service device detects video image and equipment working condition, when meeting alert if, then sends warning and fail secure signal.
5. the real-time displaying scene video of (305) monitoring host computer, methane transducer data and equipment working condition, and receive video identification service device alarm signal, when meeting alert if, then automatic sound-light alarm; Production management personnel can check live real-time video, methane transducer data, alarm condition and equipment situation, when the hardware of video and data acquisition is damaged, then transfer history live video and sensing data.Production management personnel manually can send warning and fail secure signal, cut off underground coal mine whole non-intrinsically safe secured electrical device power supply (DPS), issue dispatch command notice and withdraw from coal mine underground operators.
Embodiment 2:
System mainly comprises as shown in Figure 4:
1. storage server (401); Be responsible for gathering vision signal, alarm signal, methane transducer signal and equipment working condition, storing, and provide inquiry to transfer service for user.
2. monitoring host computer (402); There is sound and light of alarm, production management personnel check live video image, alarm condition, methane transducer data and equipment situation by monitoring host computer, manually can send warning and fail secure signal, cut off underground coal mine whole non-intrinsically safe secured electrical device power supply (DPS), issue dispatch command notice and withdraw from coal mine underground operators.And history monitor data can be transferred from storage server.
3. monitor guest machine (403); When monitoring host computer breaks down, carry out work by monitoring guest machine.
4. the network switch (404); Be responsible for management and the exchanges data of the equipment of the mining Ethernet of all accesses.
5. down-hole switch (405); Be responsible for access and the exchanges data of substation, there is flameproof enclosure, meet underground coal mine requirement of explosion proof.
6. substation (406); Be responsible for access and the exchanges data of video camera and sensor, there is flameproof enclosure, meet underground coal mine requirement of explosion proof.
7. video identification warning device (407); Primary processor selects dsp chip, digitlization and compression process are carried out to the analog video signal by camera acquisition, by netting twine by compression after video signal transmission to substation, carry out analysis to video image to identify simultaneously, image change in identifiable design setting area and object move, when image change and object move the alarming index reaching setting, automatic output alarm signal.Video identification warning device and video camera (408) are jointly placed on one and meet in the explosion-resistant enclosure of coal mine explosion-proof requirement.
8. video camera (408); Adopt analog video camera, outputting standard analog video signal, is jointly placed on one with video identification warning device (407) and meets in the explosion-resistant enclosure of coal mine explosion-proof requirement.
9. methane transducer (409); Methane transducer is gamut or the dense methane transducer of height, and has auto-alarm function.
The course of work that embodiment 2 video management and bump are reported to the police is as shown in Figure 5:
1. (501) camera acquisition video data, is transferred to video identification warning device by video analog signal, and video identification warning device digitized video is also compressed, by compression after vision signal and mobile alarm Signal transmissions to substation.
2. (502) video identification warning device carries out analysis identification to video image, and the image change in identifiable design setting area and object move, and when image change and object move the alarming index reaching setting, automatic output alarm signal is to substation.
3. gathered various types of signal is sent to down-hole switch by mining ethernet ring network by (503) each substation.
4. the data that under (504) network switch received well, switch forwards, and vision signal, sensor signal and alarm signal are distributed to storage server, monitoring host computer and backup host.
5. vision signal, sensor signal and alarm signal store by (505) storage server.
6. the real-time displaying scene video of (506) monitoring host computer, sensing data, alarm condition and equipment working condition, when meeting alert if, then automatic sound-light alarm; Production management personnel can check live real-time video, alarm condition and equipment working condition, are then transferred history live video and data when the hardware of video and data acquisition damages.Production management personnel manually can send bump and report to the police and fail secure signal, cut off underground coal mine whole non-intrinsically safe secured electrical device power supply (DPS), issue dispatch command notice and withdraw from coal mine underground operators.
The testing process of coal-face camera video image is as shown in Figure 6:
1. (601) are arranged the guarded region A in video monitoring range, transfer setting area data when each identified server starts.
2. standard compression video flowing is reduced to picture frame by (602).
The video image of current collection is:
F＝{f(x，y)，x∈M，y∈N，MN}
Image resolution ratio is M × N, and (x, y) is the coordinate of video image any point, and f (x, y) is the gray value of video image mid point (x, y).
3. (603) use difference algorithm to carry out computing at interval of the guarded region of the right video image of 5 frames and background image, and background image certain interval of time upgrades automatically.
If background image is:
B＝{b(x，y)，x∈M，y∈N，MN}
Make current video image and each respective pixel of background image carry out calculus of differences, 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) carry out the segmentation of binary conversion treatment realization to moving object to error image, realize the segmentation to moving object; Grey scale change as certain pixel exceedes setting threshold value T, then the gray value of this pixel is set as 255, represents the region that there occurs object movement, otherwise is 0, represents the region that 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 to the region that there occurs object movement carries out numerical statistic, and pixel count exceedes threshold value L and then enters alert status (606);
Statistical calculation formula is:
6. (607) under alert status as detect without video data stream output, then trigger alarm (609);
7. (608) such as alert status continues within 5 seconds, to exceed threshold value L then trigger alarm (609);
8. (610) are under alert status, and as detected, the pixel count in the region of object movement is lower than threshold value L, then remove early warning (611);
In air intake lane and return airway, the testing process of camera video image is as shown in Figure 7 (part expression formula can with reference to the explanation of above Fig. 6):
1. standard compression video flowing is reduced to picture frame by (701).
2. (702) use difference algorithm to carry out computing at interval of 5 frames to video image and background image, and background image certain interval of time upgrades.
3. (703) carry out the segmentation of binary conversion treatment realization to moving object to error image.
4. (704) pixel count to the region that there occurs object movement is added up, and then enters alert status (705) as pixel count exceedes threshold value L1;
5. (706) are under alert status, as not having trigger alarm in 10 seconds, then automatically terminate alert status (707).
6. (708) under alert status as detect without video data stream output, then trigger alarm (713);
7. (709) are under alert status, judge whether the pixel count in the region of object movement in video image continues to increase, and as increased, counter adds 1 (711), otherwise counter O reset returning (710).
8. (712) are if counter is more than 12, represent and detect that the pixel count in the region of object movement in video image continues to increase for 1 second, then trigger alarm (713);
Detect object that more than one piece original position fixes all to tunnel away from the implementation method of work plane direction high-speed motion as shown in Figure 8:
1. (801) are arranged the guarded region A in video monitoring range, as arranged, transfer when each identified server starts the area data arranged.
2. (802) are arranged the fixed object contour shape in static background image, can arrange multiple contour of object shape area B
1~ B
2, transfer the contour shape data arranging fixed object when each identified server starts, contour shape pixel count is respectively s
1~ s
,.
3. standard compression video flowing is reduced to picture frame by (803).
4. (804) use difference algorithm to carry out computing at interval of 5 frames to video image and background image, and background image certain interval of time upgrades.
5. (805) carry out the segmentation of binary conversion treatment realization to moving object region to error image.
6. (806) add up each fixed object contour shape region and the common factor pixel count p in region that there occurs object movement
1~ p
2.
7. (807) are as all p
iwith the pixel count s of the fixed object contour area arranged
iratio meet be greater than R%, then enter alert status (808);
wherein i=1,2 ..., n
8. (809) are under alert status, as not having trigger alarm in 10 seconds, then automatically terminate alert status (810).
9. (811) under alert status as detect without video data stream output, then trigger alarm (816);
10. (812) are under alert status, and as detected in guarded region, moving area continues to increase, then counter adds 1 (814), otherwise counter O reset returning (813).
11. (815) if counter is more than 12, represents and detects that in guarded region, moving area continues to increase for 1 second, then trigger alarm (816).
Claims (9)
1. based on a coal-face bump alarm method for image, it is characterized in that: underground coal mine, on coal face hydraulic support or coal-winning machine, in coal-face air intake lane, in coal-face return airway, place video camera; Each road vedio data that real-time detection gathers, detects the working condition of video camera and communication line, monitors the change of the methane transducer numerical value of near zone simultaneously; When detecting that in camera video image, object accumulation or voluminous object high-speed motion appear in setting regions extremely, be then judged to be data exception; When data exception being detected, or data exception and relevant device fault occur at short notice in succession, and the methane concentration simultaneously monitoring near zone is normal, then send bump and report to the police and signal.
2. alarm method as claimed in claim 1, is characterized in that: camera installation locations is near top, tunnel or be highly greater than 2 meters; Manual setting focal length of camera and exposure value, and auto-focusing and the automatic white balance function of closing video camera.
3. alarm method as claimed in claim 1, it is characterized in that: to domestic not set by the subregion that coal-winning machine and scraper plate block of scope camera supervised on coal face hydraulic support or coal-winning machine, at camera operation under the normal and normal condition of video communication, when the vedio data generation acute variation of setting regions being detected, and data variation is irrecoverable, the methane concentration simultaneously monitoring near zone is normal, then send bump alarm signal.
4. alarm method as claimed in claim 3, is characterized in that: use difference algorithm to carry out computing to the video image of camera acquisition on coal face hydraulic support or coal-winning machine and the setting regions of background image; Again the segmentation of binary conversion treatment realization to moving object is carried out to error image; The pixel count that there occurs the region of object movement when statistics exceedes threshold value and continues for some time, and the methane concentration simultaneously monitoring near zone is normal, then send bump alarm signal.
5. alarm method as claimed in claim 1, it is characterized in that: when have in the video image of camera acquisition coal-face air intake lane and return airway being detected voluminous object to tunnel away from work plane direction high-speed motion time, the methane concentration simultaneously monitoring near zone is normal, then send coal and gas prominent alarm signal.
6. alarm method as claimed in claim 5, is characterized in that: use difference algorithm to carry out computing to the video image of camera acquisition of coal-face air intake lane and return airway and this road background image of preservation; Error image is being carried out to the segmentation of binary conversion treatment realization to moving object; When statistics finds that the pixel count in the region of certain road objects in images movement all exceedes dependent thresholds and continues to increase, the methane concentration simultaneously monitoring near zone is normal, then send coal bump alarm signal.
7. alarm method as claimed in claim 1, it is characterized in that: when detect the fixing object of the more than one piece original position in picture all to tunnel away from work plane direction high-speed motion, the methane concentration simultaneously monitoring near zone is normal, then send bump alarm signal.
8. alarm method as claimed in claim 7, is characterized in that: set guarded region and fixed object contour shape in static background image is arranged in advance; The background image of difference algorithm to video image and preservation is used to carry out computing; The segmentation of binary conversion treatment realization to moving object is carried out to the error image that computing obtains; Add up each fixed object contour shape region and the common factor pixel count in region that there occurs object movement, when each common factor pixel count and each fixed object contour shape area pixel number ratio exceed dependent thresholds, and continue to increase, the methane concentration simultaneously monitoring near zone is normal, then send bump alarm signal.
9. alarm method as claimed in claim 1, it is characterized in that: the internal or external digital signal processor of video camera can be utilized in video acquisition front end to complete analysis to video image and warning, or directly use the video camera with mobile detection function to monitor, mobile alarm signal is sent when detecting object and moving, the methane concentration simultaneously monitoring near zone is normal, then send bump alarm signal.
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| CN105422180A (en) * | 2016-01-04 | 2016-03-23 | 中国矿业大学(北京) | Underground flood alarm system based on image and water inflow monitoring device |
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| CN108071423A (en) * | 2018-02-23 | 2018-05-25 | 中国矿业大学(北京) | mine explosion monitoring system based on infrared image monitoring device |
| CN108131166A (en) * | 2018-02-23 | 2018-06-08 | 中国矿业大学(北京) | Mine explosion monitor and alarm system based on image |
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