CN105872982B - Disaster-resistant mine emergency communication and positioning system - Google Patents
Disaster-resistant mine emergency communication and positioning system Download PDFInfo
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- CN105872982B CN105872982B CN201610291060.2A CN201610291060A CN105872982B CN 105872982 B CN105872982 B CN 105872982B CN 201610291060 A CN201610291060 A CN 201610291060A CN 105872982 B CN105872982 B CN 105872982B
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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
- E21F17/04—Distributing means for power supply in mines
- E21F17/06—Distributing electric power; Cable networks; Conduits for cables
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses an emergency communication and positioning system for a disaster-resistant mine, which comprises wireless node equipment and wireless power supply equipment, wherein the wireless power supply equipment supplies power for the wireless node equipment in a wireless power supply mode, and when a disaster accident occurs in the mine, an emergency wireless communication network can be formed through the wireless node equipment to provide communication service for underground wireless terminal equipment. The system can avoid communication interruption between the underground and the uphole caused by the damage of communication and power supply cables when disasters occur, ensure that reliable communication and positioning service can be provided for underground trapped personnel and rescue workers after the underground disasters occur, and simultaneously provide data link communication service for video and sensor equipment.
Description
Technical Field
The invention relates to an emergency communication and positioning system for a disaster-resistant mine, which relates to the fields of wireless communication technology, wireless charging technology and the like.
Background
Coal is the main energy source in China, and accounts for about 70% of the primary energy source. The coal industry is a high-risk industry, and accidents such as gas, flood, fire, roof, coal dust and the like afflict the safe production of the coal mine. The underground communication system is one of the six safety risk avoidance systems of the coal mine, and is an important guarantee for the safety production of the coal mine. The existing underground communication system mainly comprises a wired dispatching system, a mobile communication system, a broadcasting system, a disaster relief system and a through-the-earth communication system. When accidents such as gas outburst, gas explosion, rock burst, roof fall, flood, fire disaster and the like happen underground, various communication equipment, communication cables and power supply cables in underground roadways can be damaged, so that a wired dispatching system, a mobile communication system and a broadcasting system are easily affected by the disasters and accidents and cannot be used. The wireless communication system carried by post-disaster rescue personnel in the disaster relief communication system can realize communication within a certain range after the disaster, but can not realize communication in an area which can not be reached by the rescue personnel. The through-the-earth communication system is a communication system based on a low-frequency through-the-earth communication technology, the accident influence is small, the disaster resistance is strong, but the volume of transmitting equipment and transmitting antennas for through-the-earth communication is large, the through-the-earth communication generally adopts a unidirectional broadcast communication mode, underground personnel can only receive information on a well, the information cannot be transmitted, transmitting equipment can be arranged only in a limited number of underground chambers, the situation of underground personnel which are not in the underground chambers can not be known after the accident occurs, and the through-the-earth communication system cannot meet the requirement of mine emergency communication. In order to ensure life safety of underground personnel and solve the problems, a new emergency wireless communication system is needed, so that communication interruption between the underground personnel and the underground caused by communication and damage of a power supply cable can be avoided when a disaster occurs, reliable communication and positioning service can be provided for underground trapped personnel and rescue personnel after the underground disaster occurs, and meanwhile, data link communication service can be provided for video and sensor equipment.
Disclosure of Invention
The invention aims to provide an emergency communication and positioning system for a disaster-resistant mine, wherein wireless node equipment is installed at a certain distance in the pit, and the wireless node equipment adopts a wireless multi-hop communication mode to form a wireless communication network; the underground wireless mobile terminal equipment is accessed into a wireless communication network by the wireless node equipment; the wireless node equipment is internally provided with a storage battery; the wireless node equipment provides working electric energy and storage battery charging electric energy by the wireless power supply equipment; the wireless power supply equipment provides power input by a power supply cable; when the wireless power supply equipment cannot work, the wireless node equipment supplied with power automatically enters a power saving working state, and the wireless node equipment can be activated by the wireless mobile terminal equipment and other adjacent equipment to provide communication and positioning services for the system; when the wireless node equipment is in a power saving working state, only receiving the wireless signal and not transmitting the wireless signal; after being activated to enter a normal working state, the wireless node equipment has complete transmitting, receiving and networking functions; after the activated wireless node equipment completes the communication, automatically entering a power saving working state; emergency communication may be initiated by a wireless mobile terminal device or by a communication device on the well.
1. The system further comprises: the wireless power supply device can adopt an infrared power supply device adopting an infrared power supply mode, or a laser power supply device adopting a laser power supply mode, or a radio power supply device adopting a radio power supply mode.
2. The system further comprises: the wireless node equipment shell comprises a top and a bottom, the bottom of the wireless node equipment is fixed close to the mounting surface, the cross section of the shell is characterized in that the side surface is streamline, the top is not provided with an acute angle or a right angle, and the junction angle between the bottom and the top is an acute angle; the top material adopts a high-temperature resistant heat insulation material without a wireless signal shielding effect; the bottom material is made of a material with good heat conduction property; the wireless node device housing has a waterproof function.
3. The system further comprises: the power supply cable adopts a leaky cable.
4. The system further comprises: when the wireless node equipment is activated by the wireless mobile terminal equipment, if the wireless mobile terminal equipment needs uplink communication, the wireless node equipment activates adjacent wireless node equipment in the uplink communication direction, and all the wireless node equipment in the uplink direction is activated step by step in a relay mode, so that the network environment construction of a link required by the communication is completed; when the system needs downlink communication or positioning, the relay activation mode is also adopted to activate the wireless node equipment needed by the communication or positioning, so as to complete the construction of the network environment needed by the communication or positioning; when the communication is completed, the wireless node equipment which cannot be charged automatically enters a power saving state.
5. The system further comprises: the power input of the wireless power supply equipment can adopt a unified power supply mode or a partition power supply mode; when a unified power supply mode is adopted, all wireless power supply devices are connected in parallel on the same path of direct current power supply cable, so that the path of direct current power supply cable is used for uniformly supplying power, and the power supply is provided by all alternating current/direct current conversion devices connected in parallel on the path of direct current power supply cable; when the partition power supply mode is adopted, the wireless power supply equipment of each area is connected in parallel to the direct current power supply cable of the area, so that the direct current power supply cable of the area is used for supplying power, and the power supply is independently provided by the alternating current/direct current conversion equipment of the area.
6. The system further comprises: when the power supply mode is adopted, an alternating current/direct current conversion module is arranged in the wireless power supply equipment, and the wireless power supply equipment can be directly connected with an alternating current power supply cable to realize power supply.
7. The system further comprises: the wireless mobile terminal equipment comprises a mobile phone, a positioning card, a miner lamp with a wireless communication function, a portable instrument with the wireless communication function and other equipment with the wireless communication function.
8. The system further comprises: the wireless mobile terminal device is provided with an emergency call button for activating the wireless node device within the communication area.
9. The system further comprises: the wireless node equipment is arranged on the side wall or the top of the roadway and the wall of the shaft, and can also be arranged on auxiliary facilities which are firm on the side wall or the top of the roadway and the wall of the shaft and are permanently reserved in the service life of the roadway.
Drawings
FIG. 1A schematic diagram 1 of an anti-disaster mine emergency communication and positioning system is implemented.
FIG. 2 is a schematic diagram of an embodiment of a disaster-resistant mine emergency communication and positioning system.
Fig. 3 is a unified power supply schematic diagram of a wireless power supply device.
Fig. 4 is a schematic diagram of wireless power supply device area power supply.
Fig. 5 is a schematic diagram of the installation positions of the wireless power supply device and the wireless node device.
Fig. 6 is a schematic diagram showing the installation and cross-sectional structure of a wireless power supply device and a wireless node device in a radio power supply mode.
FIG. 7 is a schematic diagram showing the installation and cross-sectional structure of a wireless power supply device and a wireless node device in an infrared or laser power supply mode
Fig. 8 is a schematic diagram of the principle composition of the wireless power supply device.
Fig. 9 is a schematic diagram of the principle components of a wireless node device.
Fig. 10 is a system workflow diagram of a wireless mobile terminal device initiated communication downhole.
FIG. 11 is a system workflow diagram of an uphole device calling a wireless mobile terminal device communication downhole.
Detailed Description
Embodiment 1 of the communication and positioning system is shown in fig. 1, and comprises:
1. the monitoring terminal (101) is in bidirectional communication with the underground wireless mobile terminal equipment (106) through a wireless communication network.
2. The switch (102) is responsible for data exchange of all devices accessing the Ethernet and is also responsible for establishment and management of the wireless communication network.
3. And the wireless power supply equipment (103) is used for supplying power to the wireless node equipment (104) in a wireless power supply mode, and the direct-current electric energy is obtained from the alternating-current/direct-current conversion equipment (105) through a power supply cable.
4. A wireless node device (104) responsible for constructing a wireless communication network; under the condition that the wireless power supply equipment (103) cannot work normally, the wireless power supply equipment automatically enters a power saving working state, can be activated by the wireless mobile terminal equipment (106) and other adjacent equipment to enter the normal working state, and automatically returns to the power saving working state after communication is completed.
5. An AC/DC conversion device (105) for converting the underground AC power supply into DC power to supply power to the wireless power supply transmitting device (103) through a power supply cable; if an alternating current power supply mode is adopted, the wireless power supply equipment is directly connected with an underground alternating current power supply, and an alternating current/direct current conversion equipment is not needed.
6. The wireless mobile terminal device (106) comprises a mobile phone, a positioning card, a miner lamp with a wireless communication function, a portable instrument with a wireless communication function and other devices with a wireless communication function, and is provided with an emergency call button for activating the wireless node device (104) in a power saving state in a communication area.
FIG. 2 is a schematic diagram of an embodiment of the communication and positioning system in an inclined shaft or a footrill.
The power supply modes of the wireless power supply equipment comprise a unified power supply mode, a partitioned power supply mode and an alternating current power supply mode. As shown in fig. 3, all wireless power supply devices (103) are powered by a unified power supply cable in a direct current power supply mode, the wireless power supply devices (103) are connected with the unified power supply cable in a parallel mode, and an alternating current/direct current conversion device (105) is connected in parallel at a certain distance to compensate cable voltage drop during implementation, so that power supply voltage is ensured.
As shown in fig. 4, the embodiment of the partition power supply mode of the wireless power supply device is different from the unified power supply in that the unified power supply cable is not adopted, but the power supply is adopted on the regional power supply cable, and the power supply is independently provided by the ac/dc conversion device (105) of the region.
Fig. 5 is a schematic diagram of installation positions of a wireless power supply device and a wireless node device in a roadway, and the wireless power supply device (103) and the wireless node device (104) are installed adjacently.
Fig. 6 is a schematic diagram of installation and cross-sectional structure of a wireless power supply device and a wireless node device in a wireless power supply mode, including:
1. the anchor rod (601) is used for fixedly mounting the wireless node equipment, and penetrating into the roadway wall to enable the bottom of the wireless node equipment to be tightly attached to the mounting plane for fixing, so that the wireless node equipment can be effectively prevented from falling off when an accident happens.
2. The bottom (602) of the wireless node equipment shell is used for carrying and installing all parts of the wireless node equipment, adopts materials with good heat conduction performance, has a waterproof function, and can conduct heat inside the equipment to a medium contacted with the bottom for conducting and radiating.
3. The top (603) of the wireless node equipment shell is streamline, adopts a high-temperature-resistant heat-insulating material without a wireless signal shielding effect, and has a waterproof function.
4. And the wireless node equipment main boards are fixed with copper columns (604) and are used for supporting and fixing the wireless node equipment main boards (203), 4 in number and fixed at the bottom of the wireless node equipment.
5. A wireless node device battery (605) is mounted at the bottom of the wireless node device housing.
6. A wireless node device motherboard (606) including all wireless node device components except the antenna is mounted above the battery at a distance from the battery.
7. And the wireless node equipment communication antenna (607) is connected with the IPX interface on the main board by adopting a flexible special patch cord.
8. The wireless node device powers a receive antenna (608) opposite a wireless powering a transmit device transmit antenna (210).
9. And the expansion bolt (609) is used for installing and fixing the wireless power supply transmitting equipment.
10. A wireless power supply device power transmitting antenna (610) is mounted against the housing wall opposite the wireless node device power receiving antenna (608).
11. The wireless power supply equipment mainboard (611) mainly comprises a wireless power supply emission management component.
12. A direct current voltage conversion module (612) of the wireless power supply device.
13. A wireless power supply housing (613).
Fig. 7 is a schematic diagram of installation and cross-sectional structure of a wireless power supply device and a wireless node device in an infrared or laser power supply mode, and the installation mode and the overall structure of the device are basically the same as those shown in fig. 6, and the main differences are that:
1. a semiconductor laser (701) capable of emitting near infrared laser light of 810nm or laser light of other wavelength.
2. A single crystal silicon photoelectric conversion plate (702); a near infrared laser or laser light of other wavelength is converted into electric energy, and a plurality of photoelectric conversion plates are connected in parallel.
As shown in fig. 8, the main hardware components of the wireless power supply device include:
1. and the direct-current voltage conversion module (801) is used for inputting voltage 24V, and outputting voltage and power to meet the power supply requirement of the wireless power supply emission management module.
2. A wireless power supply emission management module (802), if a wireless power supply mode is adopted, an XKT-830B module is adopted; if an infrared or laser power supply mode is adopted, a semiconductor laser is adopted to emit a relevant control module.
3. A wireless power supply emitting part (803), if a wireless power supply mode is adopted, an annular emitting coil is adopted, the outer diameter of the coil is 48mm, the inner diameter of the coil is 30mm, and the thickness of the coil is 0.6mm; if an infrared or laser power supply mode is adopted, a semiconductor laser is used as a transmitting component.
As shown in fig. 9, the hardware components of the wireless node device are as follows:
3. and a processor (901) which adopts an Atheros AR7161 wireless network processor and has the working frequency of 600Mhz.
4. A storage unit (902); including flash memory and random access memory. The Flash memory adopts 32M Flash; the random access memory adopts 128M SDRAM.
5. Wireless communication unit (903): including a wireless communication module and an antenna. The wireless communication module core chip adopts an Atheres AR9220; the antenna adopts an FPC board type built-in antenna, and is connected with an IPX interface led out by AR9220 on the main board through a flexible special patch cord, and the maximum gain is not less than 3.5dBi.
6. The wireless node equipment closest to the roadway exit has the function of accessing an emergency wireless communication network into an uphole wired network besides the wireless access function of the wireless mobile terminal equipment, so that the wireless node equipment is provided with a wired communication unit. The wired communication unit (904) includes a wired communication module and a communication interface. The core chip of the wired communication module adopts Atheros AR8035 to support gigabit Ethernet. The communication interface is a standard ethernet communication interface.
7. Power supply unit (905): the lithium ion battery has the functions of reverse connection prevention, external protection circuit, overcharge prevention, overdischarge prevention, overcurrent, short circuit and the like, and balanced charge and balanced discharge. The voltage conversion is responsible for converting the output voltage of the lithium battery into the voltage required by other unit elements, and a MAX1724 power chip is adopted. The battery charging management core chip adopts a CS0301 lithium battery charging management chip.
8. Wireless power supply unit (906): comprising a wireless power supply receiving management module and an energy receiving component. If a radio power supply mode is adopted, the wireless power supply receiving management module adopts an XKT-830B receiving module, the energy receiving part adopts a ring-shaped coil, the outer diameter of the receiving coil is 30mm, the inner diameter of the coil is 15mm, and the thickness of the coil is 0.6mm; if an infrared or laser power supply mode is adopted, the monocrystalline silicon photoelectric conversion plate is used as an energy receiving component, and a wireless power supply receiving management module matched with the monocrystalline silicon photoelectric conversion plate is used.
During emergency communication, for example, the underground wireless mobile terminal equipment initiates communication, the working flow of the system is as shown in fig. 10:
1. (1001) The emergency call button and the call number of the wireless mobile terminal device are pressed, and the wireless mobile terminal device sends a network link establishment request.
2. (1002) And the latest wireless node equipment receives a network link establishment request of the wireless mobile terminal equipment, and if the wireless node equipment is in a power saving state, the wireless node equipment is switched into a normal working state from the power saving state.
3. (1003) The wireless node device queries the route of the called device.
4. (1004) The wireless node device judges the network link direction according to the route, if the called device is accessed by the wireless node device, the execution (1007) is carried out; if the routing level of the called device is low, then executing (1005); if the routing level of the called device is higher, it is executed (506).
5. (1005) And sequentially waking up the wireless node devices in the power saving state in the uplink direction until the wireless node devices in the area where the called device is located, if the called device is the on-well device, waking up all the wireless node devices in the uplink direction.
6. (1006) And sequentially waking up the wireless node equipment in the power saving state in the downlink direction until the wireless node equipment in the area where the called equipment is located.
7. (1007) After all the devices required by the network link are awakened, the network link between the calling device and the called device is established.
8. (1008) The calling device and the called device communicate over a network link.
9. (1009) Either the calling device or the called device actively ends the communication or the network link is disconnected if no data communication is available in the network link beyond a set time.
10. (1010) After the network link is disconnected and delay is set for a time, the wireless node equipment which is in the power saving state on the network link is switched into the power saving state again.
During emergency communication, for example, the above-mentioned equipment initiates communication with the underground wireless mobile terminal equipment, the working flow of the system is as shown in fig. 11:
1. (1101) The uphole device calls the wireless mobile terminal device downhole.
2. (1102) A wireless node device accessing a wired network receives a network link establishment request from an uphole device.
3. (1103) The wireless node device queries the route of the called device.
4. (1104) And sequentially waking up the wireless node equipment in the power saving state in the downlink direction until the wireless node equipment in the area where the called equipment is located.
5. (1105) After all the devices required by the network link are awakened, the network link between the calling device and the called device is established.
6. (1106) The calling device and the called device communicate over a network link.
7. (1107) Either the calling device or the called device actively ends the communication or the network link is disconnected if no data communication is available in the network link beyond a set time.
8. (1108) After the network link is disconnected and delay is set for a time, the wireless node equipment which is in the power saving state on the network link is switched into the power saving state again.
Claims (5)
1. The utility model provides a disaster-resistant mine emergency communication and positioning system, the system includes wireless node device, wireless mobile terminal device and wireless power supply unit, its characterized in that: installing wireless node equipment at a certain distance underground, wherein the wireless node equipment adopts a wireless multi-hop communication mode to form a wireless communication network; the underground wireless mobile terminal equipment is accessed to a wireless communication network by wireless node equipment, and the wireless mobile terminal equipment is provided with an emergency call button; the wireless node equipment is internally provided with a storage battery; the wireless mobile terminal equipment comprises a mobile phone, a positioning card, a miner lamp with a wireless communication function, a portable instrument with the wireless communication function and other equipment with the wireless communication function; the wireless node equipment provides working electric energy and storage battery charging electric energy by the wireless power supply equipment; the wireless power supply equipment provides power input by a power supply cable, wherein the power input comprises a unified power supply mode and a partitioned power supply mode; the wireless power supply equipment adopts infrared power supply equipment in an infrared power supply mode, laser power supply equipment in a laser power supply mode or radio power supply equipment in a radio power supply mode; when the wireless power supply equipment cannot work, the wireless node equipment supplied with power automatically enters a power saving working state, and the wireless node equipment can be activated by the wireless mobile terminal equipment and other adjacent equipment to provide communication and positioning services for the system; when the wireless node equipment is activated by the wireless mobile terminal equipment, if the wireless mobile terminal equipment needs uplink communication, the wireless node equipment activates adjacent wireless node equipment in the uplink communication direction, and all the wireless node equipment in the uplink direction is activated step by step in a relay mode, so that the network environment construction of a link required by the communication is completed; when the system needs downlink communication or positioning, the relay activation mode is also adopted to activate the wireless node equipment needed by the communication or positioning, so as to complete the construction of the network environment needed by the communication or positioning; after the communication is completed, the wireless node equipment which cannot be charged automatically enters a power saving state; when the wireless node equipment is in a power saving working state, only receiving the wireless signal and not transmitting the wireless signal; after being activated to enter a normal working state, the wireless node equipment has complete transmitting, receiving and networking functions; the emergency communication can be initiated by the wireless mobile terminal equipment or by communication equipment on the well; the wireless node equipment shell comprises a top and a bottom, the bottom of the wireless node equipment is fixed close to the mounting surface, the cross section of the shell is characterized in that the side surface is streamline, the top is not provided with an acute angle or a right angle, and the junction angle between the bottom and the top is an acute angle; the top material adopts a high-temperature resistant heat insulation material without a wireless signal shielding effect; the bottom material is made of a material with good heat conduction property; the wireless node equipment shell has a waterproof function; the wireless node equipment is arranged on the side wall or the top of the roadway and the wall of the shaft, and can also be arranged on auxiliary facilities which are firm on the side wall or the top of the roadway and the wall of the shaft and are permanently reserved in the service life of the roadway.
2. The communication and positioning system of claim 1, wherein: the power supply cable adopts a leaky cable.
3. The communication and positioning system of claim 1, wherein: when a unified power supply mode is adopted, all wireless power supply devices are connected in parallel on the same path of direct current power supply cable, so that the path of direct current power supply cable is used for uniformly supplying power, and the power supply is provided by all alternating current/direct current conversion devices connected in parallel on the path of direct current power supply cable; when the partition power supply mode is adopted, the wireless power supply equipment of each area is connected in parallel to the direct current power supply cable of the area, so that the direct current power supply cable of the area supplies power, and the power supply is independently provided by the alternating current/direct current conversion equipment of the area.
4. The communication and positioning system of claim 1, wherein: when the power supply mode is adopted, an alternating current/direct current conversion module is arranged in the wireless power supply equipment, and the wireless power supply equipment can be directly connected with an alternating current power supply cable to realize power supply.
5. The communication and positioning system of claim 1, wherein: when the wireless mobile terminal equipment initiates emergency communication, the power saving operation flow comprises the following steps: (1) the wireless mobile terminal device presses an emergency call button; (2) The nearest wireless node equipment receives a network link establishment request of the wireless mobile terminal equipment, and if the wireless node equipment is in a power saving state, the wireless node equipment is switched into a normal working state from the power saving state; (3) The wireless node equipment inquires the route of the called equipment and judges the direction of the network link according to the route; (4) Sequentially waking up the wireless node devices in the power saving state in the communication direction until the wireless node devices in the area where the called devices are located; (5) Establishing a network link between calling equipment and called equipment, and communicating through the network link; (6) The network link is disconnected after the communication is finished or no communication data of the network link exceeds a set time; (7) The wireless node device which is originally in the power saving state on the network link is switched into the power saving state again.
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| CN106340173A (en) * | 2016-09-27 | 2017-01-18 | 电子科技大学 | Self-energized wireless sensing technology and wireless sensing system thereof |
| CN107246281B (en) * | 2016-10-21 | 2019-12-10 | 中国矿业大学(北京) | Monitoring and early warning system for fire in mine |
| CN107613580B (en) * | 2017-10-19 | 2023-05-02 | 中国矿业大学(北京) | Disaster-resistant mine emergency communication system |
| CN107820220A (en) * | 2017-11-28 | 2018-03-20 | 拜城县众维煤业有限公司 | A kind of mine emergency rescues multi-functional communications node |
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