CN105484799A - Underground flood alarm method based on image and water sump monitoring - Google Patents

Underground flood alarm method based on image and water sump monitoring Download PDF

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CN105484799A
CN105484799A CN201610001290.0A CN201610001290A CN105484799A CN 105484799 A CN105484799 A CN 105484799A CN 201610001290 A CN201610001290 A CN 201610001290A CN 105484799 A CN105484799 A CN 105484799A
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setting
time
sump
water
image
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CN105484799B (en
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孙继平
刘毅
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China University of Mining and Technology CUMT
China University of Mining and Technology Beijing CUMTB
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China University of Mining and Technology Beijing CUMTB
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source

Abstract

The invention discloses an underground flood alarm method based on image and water sump monitoring. The alarm method includes the steps that cameras are placed on an underground coal mine tunneling working face, a coal working face or other operation faces possibly having a water inrush accident, and a water sump liquid level monitoring device and a water discharge monitoring device are placed in a downstream water sump of a drainage channel of a roadway monitored by each camera; when it is monitored that abnormal water flow appears in a set region in video images of the cameras, moreover, the duration time of the water flow exceeds a set time threshold value or water flow increasing speed exceeds a set threshold value, and meanwhile water intake quantity of the corresponding water sump is abnormal, a flood alarm signal is sent out. The alarm method fully considers the characteristic of a coal mine coal working face flood and is easy to implement, corresponding measures are taken automatically in time, an alarm can be given for water inrush of a coal mine accurately at first time, and valuable rescue and escape time is bought for underground staff, not at the flood site, in other regions.

Description

Based on the down-hole floods alarm method that image and sump are monitored
Technical field
The present invention relates to a kind of down-hole floods alarm method of monitoring based on image and sump, the method relates to the fields such as image steganalysis, sensor, communication.
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, natural calamity larger to mine harmfulness during mine water disaster, calculates with the number of coal mining accident death, water damage accident accounts for 15.72%, is only second to gas and roof accident, occupies the 3rd, after mine generation floods accident, its harm comprises:
1, to destroy by rush of water tunnel, pile things on, to flood and shutoff personnel.
2, with gushing water, have a large amount of coal slimes and rock alluvial tunnel, cause difficulty to personnel escape.
3, damage equipment.Down-hole electrical equipment, after cable is immersed in water, its insulating capacity declines rapidly, causes difficulty to the transport of down-hole, ventilation, draining etc., and the probability of surviving of the personnel that do not flee from time is reduced.
4, to gush out a large amount of toxic and harmfuls, the life condition environment of not fleeing from personnel is in time worsened more.
In sum, mine water disaster is the serious disaster in colliery, must accomplish promptly and accurately in coal production to the warning of mine water disaster.Current floods early warning based on the hydrology detection prevention, underground for probing water, tendency phenomenon observe and, hydrology detection and underground for probing water can prevent down-hole floods accident, but due to hydrologic regime complexity also may be there is, design improper, take effective measures, manage improperly and the reason such as thought paralysis of people, hydrology detection and underground for probing water can not prevent the generation of gushing water completely, more can not report to the police to the down-hole gushing water of burst; Based on artificial micro-judgment, there is larger subjective factor in the observation of tendency phenomenon.At present for on-the-spot water inrush accident, the artificial warning of main dependence Field Force, but when gushing water occurs in unattended time or region, or Field Force flees from hastily and fails initiative alarming, control room just cannot obtain the information that gushing water occurs timely, down-hole relevant staff cannot be notified in time, so that can not take emergency measures in time to water inrush accident, easily cause the out of control and casualties of water damage.For effectively reducing the mine property loss and casualties that floods cause, need new down-hole floods alarm method, exactly down-hole gushing water can be reported to the police the very first time, for not striving for the valuable disaster relief and escape time other region personnel in the pit that scene occurs.
Summary of the invention
When the present invention, according to down-hole, water inrush accident occurs, have a large amount of water outwards spouting, and constantly, the feature constantly increased proposes a kind of down-hole floods alarm method of monitoring based on image and sump.Video camera is placed, simultaneously the liquid level data of the escape canal downstream sump in tunnel, acquisition camera place and displacement data in underground coal mine driving face, coal-face or other scope of operation place that water leak accident may occur; Real-Time Monitoring is carried out to the liquid level data of vedio data and sump, there are abnormal current when monitoring setting regions in camera video image, and the current duration exceedes the time threshold of setting or current pushes the speed when exceeding setting threshold value, be then judged to be data exception; And the threshold value that the inflow of working as discovery sump increases above setting then sends floods alarm signal.Described method specifically comprises:
1. camera installation locations is near top, tunnel or be highly greater than 2 meters, and install secondary light source video camera is other, it is consistent that light projecting direction and camera video gather direction; Close auto-focusing and the automatic white balance function of video camera.
2. the subregion A in pair camera supervised scope sets, and adds up, obtain sequence H to the pixel count of each gray value i in every frame video image region A i; The arithmetic mean of instantaneous value of the pixel count of each gray value in computing K two field picture region A, obtain sequence S i; Ask and be more than or equal to setting gray value M 1pixel summation D s, and by last frame image as a setting image b (x, y) store, interval time T mto D supgrade with b (x, y); Ask in latest image frame at interval of P frame and in the A of region, be more than or equal to setting gray value M 2pixel summation D h, work as D hbe more than or equal to D ssetting threshold value M 3time, i.e. (D h-D s)>=M 3time, trigger early warning, and store b (x, y); As (D h-D s) < M 3, then D is upgraded swith b (x, y), then upgrade D swith b (x, y); K, P, M 1, M 2, M 3, T mobtain by measuring setting or artificially setting.
3. after entering modes of warning, at interval of Q 1frame carries out accumulated deficiency process to the real time video image f (x, y) of camera acquisition and the background image b (x, y) that deposits, and accumulated deficiency operational formula is:
P in formula n(x, y), for having processed the accumulated deficiency image of n frame, initial value is 0, A is setting regions, T 1for setting gray threshold; By accumulated deficiency calculation process Q 2after frame, ask and be more than or equal to setting gray value T 2pixel summation D t, as met D t>=M 4, be then judged to be that view data is abnormal; M in formula 4for the threshold value of setting; Q 1, Q 2, T 1, T 2, M 4obtain by measuring setting or artificially setting.
4. monitor view data abnormal after, interval time T nthe inflow L of monitoring sump changes, inflow h in formula ifor the sump liquid level data of Real-time Collection, h sfor monitoring sump liquid level data during view data exception, S is sump cross-sectional area, and T monitors the view data abnormal moment to current time span, and P is the draining total amount in time T, as met then send floods alarm signal, L in formula sfor average inflow, R is the inflow growth rate threshold value of setting; T h, L s, R is by measuring setting or artificial setting obtains.
Accompanying drawing explanation
The down-hole floods warning system schematic diagram that Fig. 1 monitors based on image and sump.
Fig. 2 displacement monitoring equipment fundamental diagram.
Fig. 3 is based on image and sump monitoring floods alert operation schematic flow sheet.
Fig. 4 floods monitor server monitoring schematic flow sheet.
Detailed description of the invention
Described floods alarm method is realized by monitoring system, and system composition mainly comprises:
1. storage server (101), is responsible for receiving video data, water bunker level data and sump displacement data and storing, for monitoring host computer and floods monitor server provide inquiry to transfer service.
2. floods monitor server (102), receive the digital video frequency flow of camera acquisition, the video image of video camera is processed, the aberrant continuation change that in monitoring camera video image, setting regions occurs, and the corresponding tunnel water bunker level of reference storage server storage and displacement data, then export gushing water alarm signal to monitoring host computer as met alert if.When monitoring the too much server handling ability of video way and being not enough, multiple servers can be placed and respectively video is monitored.
3. geographic information server (103), is responsible for monitoring host computer and provides geographic information services, uses ArcGIS platform, and stores relevant geographic information data, video camera (107) position data of mine; Server has floods sunykatuib analysis function, according to gushing water position analysis floods development, according to analysis result for each working region, down-hole provides escape route information, and can send to monitoring host computer.
4. monitoring host computer (104), has sound and light of alarm, receives the alarm signal then sound and light alarm of floods monitor server (102); There is phonetic synthesis and digital voice compression encoding function, when after the escape route information obtaining each working region, down-hole from geographic information server (103), by the text message synthetic speech of gushing water position and escape route and compressed encoding, be issued to each broadcasting equipment and broadcast; Have real-time video monitoring and history video transfers function, production management personnel check live video image by monitoring host computer and can transfer history monitor data from storage server (101).
5. the network switch (105), is responsible for management and the exchanges data of the equipment of the mining Ethernet of all accesses.
6. down-hole switch (106), is responsible for substation and other access by network communication equipment and exchanges data, has flameproof enclosure, meet the requirement of underground coal mine flame proof.
7. video camera (107); Adopt the mining video camera meeting coal mine flame-proof requirement, with secondary light source, be arranged on underground coal mine driving face, coal-face or other may occur, on the places such as the scope of operation of water leak accident, to be connected with video server (108) by coaxial cable.
8. video server (108), also claims video encoder, by the analog video image digitlization of camera acquisition and compressed encoding, by mining Ethernet to aboveground storage server, floods monitor server, monitoring host computer transmitting video data.
9. substation (109), also claims data collection station, the water bunker level that responsible reception water level monitoring equipment (110) and displacement monitoring equipment (111) are uploaded and displacement data, and by data upload to floods monitoring server.Substation and each monitoring equipment adopt RS-485 standard by twisted-pair communication, can connect multiple monitoring equipment; Substation is connected with nearest down-hole switch by twisted-pair feeder or optical cable, adopts TCP mode to communicate with aboveground storage server, has flameproof enclosure, meet the requirement of underground coal mine flame proof.
10. water level monitoring equipment (110), for water bunker level collection, can use all kinds of mining floodometer, comprise induction type or ultrasonic type measuring instrument, should meet underground coal mine and to be correlated with intrinsic safety or flame proof standard, have RS-485 communication interface.The present embodiment adopts throw-in type pressure sensitive liquid level sensor, sensing head is according to the pressure in water and the pressure differential in air, the altitude conversion of water level is become pressure differential, then pressure differential is converted to the signal of telecommunication, by obtaining sump liquid level after A/D conversion and processor process.
11. displacement monitoring equipments (111), for detecting the actual displacement data of water pump, the present embodiment adopts induction flow meter, and flow meter is installed on the main pipe rail of exit of pump; Induction flow meter should meet underground coal mine and to be correlated with intrinsic safety or flame proof standard, has RS-485 communication interface.
12. alarm switches (112), report to the police for on-site manual, adopt RS-485 standard interface, should meet colliery downhole equipment safety requirements.
13. broadcasting equipments (113), for down-hole voice broadcast service, have digital speech decoding function, the data convert of being encoded by digital voice compression are become voice, and amplify broadcasting; Broadcasting equipment and substation adopt RS-485 standard to be communicated by twisted pair line connection.
Displacement monitoring equipment operating principle is as shown in Figure 2:
Displacement monitoring equipment uses electromagnetic flowmeter, and electromagnetic flowmeter is made up of electromagnetic flux converter and electromagnetic flow transducer.Electromagnetic flux converter is for electromagnetic flow transducer provides power supply, the other forms of signals such as becoming electric current and the flow signal measured back is adjusted.Electromagnetic flow transducer is made up of magnetic field sources (201), non-magnetic pipeline (203) and cross-section of pipeline conductive electrode (202).Magnetic field, electrode connecting line, conduit axis are mutually vertical, fluid to be measured flows through the pipe cutting magnetic line of force, magnetic field and the vertical direction of flow direction produce induced electromotive force, and its numerical value is directly proportional to the flow velocity of liquid, can measure the flow of liquid by measuring induced electromotive force.
Floods warning system workflow is monitored as shown in Figure 3 based on image and sump:
1. (301) camera acquisition video image, by analog video signal by co-axial cables transport to video server.
2. (302) video server digitized analog video signal carry out compressed encoding, by netting twine by the video data after compressed encoding with multicast transmission to storage server, monitoring host computer and floods monitor server.
3. the vedio data that sent by video server of (303) floods monitor server real-time analysis, the abnormal current in monitoring video.
4. (304) water level monitoring equipment and displacement monitoring equipment gather water bunker level and displacement data, are sent to substation by RS-485 communication interface modules.
5. (305) substation is by RS-485 interface water bunker level and displacement data, the communication protocol of data according to setting is packed, packet is sent to storage server by network interface with TCP ad hoc mode.
6. (306) storage server receives the water bunker level and displacement data uploaded by substation in TCP server mode, and stored in database.
7. (307) floods monitor server obtains water bunker level and displacement data by access storage server, comprehensive monitoring is carried out to video image monitoring (303) result, water bunker level and displacement data, sending floods alarm signal when meeting alert if to monitoring host computer, monitored camera number being sent to monitoring host computer simultaneously.
8. (308) find floods as field personnel, push for emergency button time, substation gathers the alarm signal of alarm button, the communication protocol of data according to setting is packed, packet is sent to storage server by network interface with TCP ad hoc mode.
9. (309) storage server store alarms data, and forward alarm signal to monitoring host computer.
10. (310) are when monitoring host computer receives the alarm signal of floods monitor server or storage server, by video camera or the numbering of alarm switch send to geographic information server.
11. (311) geographic information servers determine gushing water position according to the numbering of alarming video camera or alarm switch, according to gushing water position analysis floods development, again according to analysis result for each working region, down-hole provides escape route information, and send to monitoring host computer.
The real-time displaying scene video of 12. (312) monitoring host computer automatic sound-light alarm, by the text message synthetic speech of gushing water position and escape route and compressed encoding, be issued to each broadcasting equipment and broadcast.Production management personnel can check live real-time video, alarm condition and equipment situation, when the hardware of video and data acquisition is damaged, then transfer history live video data.
13. (313) down-hole broadcasting equipment receiving packages contain the speech data of gushing water position and escape route information, and decoded back is that voice signal amplifies report.
Floods monitor server monitors flow process as shown in Figure 4:
1. transferring the guarded region A parameter relevant with all monitoring computings when (401) each floods monitor server starts to carry out transferring, as not yet arranged, needing manually to arrange.
2. (402) add up the pixel count of each gray value in every two field picture region A, obtain sequence H i; The arithmetic mean of instantaneous value of the pixel count of each gray value of computing K two field picture, obtain sequence S i.
3. the pixel count D in (403) statistics setting gray area s,
4. (404) will finally collect two field picture image b (x, y) storage as a setting.
5. (405) interval P frame is asked in latest image frame and is more than or equal to setting gray value M in the A of region 2pixel summation D h, D H = &Sigma; i = M 2 255 H i .
6. (406) are as (D h-D s)>=M 3, then perform (408), otherwise perform (407); M 3for setting threshold value.
7. (407) determine whether background image T update time s, as then returned (402) to update time, otherwise return (405).
8. (408) trigger early warning, put pre-warning mark.
9. (409) upgrade and store background image b (x, y).
10. (410) continue setting-up time and carry out accumulated deficiency image operation to real time video image and background image of depositing.
11. (411) carry out gray-scale pixels statistics to processing the accumulated deficiency image obtained
In formula, f (x, y) is real time video image, P n(x, y) is setting regions for the accumulated deficiency image initial value having processed n frame is 0, A, T 1for setting gray threshold; By accumulated deficiency calculation process Q 2after frame, ask higher than setting gray value T 2pixel summation D t.
12. (412) as D t>=M 4, then perform (414), otherwise return (402) after performing (413), M 4for the growth rate threshold value of setting.
13. (414) interval time T naccess storage server obtains water bunker level and displacement data, calculates sump inflow, inflow h in formula ifor the sump liquid level data of Real-time Collection, h sfor monitoring sump liquid level data during view data exception, S is sump cross-sectional area, and T monitors the view data abnormal moment to current time span, and P is the draining total amount in time T
14. (415) monitoring sump inflow data variation, as met then perform (416), otherwise return (402) after performing (413); L in formula sfor the sump inflow statistical average before view data exception, R is the displacement growth rate threshold value of setting;
15. (416) send floods alarm signal.
16. (413) remove pre-warning mark, cancel alert status.

Claims (5)

1. a down-hole floods alarm method of monitoring based on image and sump, it is characterized in that: place video camera in underground coal mine driving face, coal-face or other scope of operation place that water leak accident may occur, simultaneously the liquid level data of the escape canal downstream sump in tunnel, acquisition camera place and displacement data; Real-Time Monitoring is carried out to the liquid level data of vedio data and sump, there are abnormal current when monitoring setting regions in camera video image, and the current duration exceedes the time threshold of setting or current pushes the speed when exceeding setting threshold value, be then judged to be data exception; And the threshold value that the inflow of working as discovery sump increases above setting then sends floods alarm 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, and at video camera other installation secondary light source, it is consistent that light projecting direction and camera video gather direction; Close auto-focusing and the automatic white balance function of video camera.
3. alarm method as claimed in claim 1, is characterized in that: set the subregion A in camera supervised scope, adds up, obtain sequence H to the pixel count of each gray value i in every frame video image region A i; The arithmetic mean of instantaneous value of the pixel count of each gray value in the region A of computing K two field picture, obtain sequence S i; Ask and be more than or equal to setting gray value M 1pixel summation D s, and by last frame image as a setting image b (x, y) store, interval time T mto D supgrade with b (x, y); Ask in latest image frame region A at interval of P frame and be more than or equal to setting gray value M 2pixel summation D h, work as D hbe more than or equal to D ssetting threshold value M 3time, i.e. (D h-D s)>=M 3time, trigger early warning, and store b (x, y); As (D h-D s) < M 3, then D is upgraded swith b (x, y), then upgrade D swith b (x, y); K, P, M 1, M 2, M 3, T mobtain by measuring setting or artificially setting.
4. alarm method as claimed in claim 3, is characterized in that: after entering modes of warning, at interval of Q 1frame carries out accumulated deficiency process to the real time video image f (x, y) of camera acquisition and the background image b (x, y) that deposits, and accumulated deficiency operational formula is:
P in formula n(x, y) is setting regions for the accumulated deficiency image initial value having processed n frame is 0, A, T 1for setting gray threshold; By accumulated deficiency calculation process Q 2after frame, ask and be more than or equal to setting gray value T 2pixel summation D t, as met D t>=M 4, be then judged to be that view data is abnormal; M in formula 4for the threshold value of setting; Q 1, Q 2, T 1, T 2, M 4obtain by measuring setting or artificially setting.
5. alarm method as claimed in claim 4, is characterized in that: monitor view data abnormal after, interval time T nthe inflow L of monitoring sump changes, inflow h in formula ifor the sump liquid level data of Real-time Collection, h sfor monitoring sump liquid level data during view data exception, S is sump cross-sectional area, and T monitors the view data abnormal moment to current time span, and P is the draining total amount in time T, as met then send floods alarm signal, L in formula sfor average inflow, R is the inflow growth rate threshold value of setting; T n, L s, R is by measuring setting or artificial setting obtains.
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CN106657935A (en) * 2017-03-01 2017-05-10 中国矿业大学(北京) Coal cutter abnormal work and disaster alarm system based on images
CN107893676A (en) * 2017-10-31 2018-04-10 深圳市中科智诚科技有限公司 A kind of tunnel monitoring device with rainwater monitoring and processing function
CN107829783A (en) * 2017-12-01 2018-03-23 中国矿业大学(北京) Based on ranging and the driving face floods warning system to test the speed
CN108005723A (en) * 2017-12-01 2018-05-08 中国矿业大学(北京) Based on ranging and the coal working face floods alarm system to test the speed
CN108286460A (en) * 2018-02-23 2018-07-17 中国矿业大学(北京) Mine explosion monitor and alarm system based on coloured image
CN108457699A (en) * 2018-03-15 2018-08-28 中国矿业大学(北京) Driving face floods alarm system based on infrared image
CN108252740A (en) * 2018-03-15 2018-07-06 中国矿业大学(北京) Swallet and sump moisture storage capacity monitoring system based on image
CN108252741A (en) * 2018-03-15 2018-07-06 中国矿业大学(北京) Coal working face floods alarm system based on infrared image
CN108194145A (en) * 2018-03-15 2018-06-22 中国矿业大学(北京) Mine water disaster alarm system based on infrared image
CN108457700A (en) * 2018-03-15 2018-08-28 中国矿业大学(北京) Mine sump monitoring and alarming system based on infrared image
CN108457699B (en) * 2018-03-15 2023-04-18 中国矿业大学(北京) Tunneling working face flood alarm system based on infrared images
CN108457700B (en) * 2018-03-15 2023-04-18 中国矿业大学(北京) Mine sump monitoring alarm system based on infrared image
CN108252740B (en) * 2018-03-15 2023-04-18 中国矿业大学(北京) Image-based mine water burst and water sump water storage capacity monitoring system
CN108194145B (en) * 2018-03-15 2023-04-18 中国矿业大学(北京) Mine flood alarm system based on infrared image
CN108252741B (en) * 2018-03-15 2023-04-18 中国矿业大学(北京) Coal face flood alarm system based on infrared image
CN110966046A (en) * 2019-12-19 2020-04-07 淮南市阶梯电子科技有限公司 Ground remote monitoring system of mine drainage device
CN110966046B (en) * 2019-12-19 2022-02-11 淮南市阶梯电子科技有限公司 Ground remote monitoring system of mine drainage device
CN112282814A (en) * 2020-10-28 2021-01-29 贵州理工学院 Roadway support device adaptable to various underground environments

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