CN105873002A - Mine emergency communicating and positioning system - Google Patents
Mine emergency communicating and positioning system Download PDFInfo
- Publication number
- CN105873002A CN105873002A CN201610291912.8A CN201610291912A CN105873002A CN 105873002 A CN105873002 A CN 105873002A CN 201610291912 A CN201610291912 A CN 201610291912A CN 105873002 A CN105873002 A CN 105873002A
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- communication
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- wireless node
- node apparatus
- radio
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/02—Constructional details
- H04Q1/09—Frames or mounting racks not otherwise provided for
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
- H04W52/0206—Power saving arrangements in the radio access network or backbone network of wireless communication networks in access points, e.g. base stations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
- H04W64/003—Locating users or terminals or network equipment for network management purposes, e.g. mobility management locating network equipment
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
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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
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Business, Economics & Management (AREA)
- Health & Medical Sciences (AREA)
- Emergency Management (AREA)
- Environmental & Geological Engineering (AREA)
- Public Health (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The invention discloses a mine emergency communicating and positioning system. The system mainly comprises an underground wireless communication network and an emergency wireless communication network; the underground wireless communication network is composed of wireless access devices, the underground wireless communication network is used for supplying communicating and positioning services in a normal working state, and when disaster accidents occur under a mine, the emergency wireless communication network is formed through wireless node devices to supply the communicating services to underground wireless terminal devices. According to the system, the phenomenon that when disasters occur, interruption of communication between the overground space and the underground is caused by damage of communication and power supply cables can be avoided, it is guaranteed that the reliable communicating and positioning services can be supplied to underground trapped persons and rescuers after the underground disasters occur, and meanwhile data link communication services can be supplied to video and sensor devices.
Description
Technical field
The present invention relates to a kind of mine emergency communication and alignment system, this system relates to the field such as wireless communication technology, wireless charging.
Background technology
Coal is China's main energy sources, accounts for primary energy 70%.Coal industry is high risk industries, gas, floods, fire,
The accident such as top board, coal dust annoyings Safety of Coal Mine Production.Downhole communication contacted system is colliery " six big safe system "
One of, it is the important leverage of Safety of Coal Mine Production.Under existing well, communication system mainly includes line dispatching patcher, movement
Communication system, broadcast system, disaster relief system, ground through communication system.When down-hole occurs Gas Outburst, gas explosion, impact
During the accidents such as ground pressure, roof fall, floods, fire, can be to the various communication equipments in underworkings, the communications cable, supply lines
Cable damages, so the disaster-prone accident impact of wired dispatching system, GSM, broadcast system cannot use.
The wireless communication system that disaster communication system is carried by Post disaster relief personnel, can realize communication after calamity in certain limit, but right
Still cannot communicate in the region that rescue personnel cannot arrive.Ground through communication system is communication system based on low frequency through the earth communication technology
System, accident impact is little, and anti-disaster ability is strong, but the transmission equipment of through the earth communication and the big cost of transmission antenna volume are high, so thoroughly
Ground communication is general uses One-to-All Broadcast communication mode, and personnel in the pit can only information on received well, it is impossible to sends information, only
Chamber at down-hole limited quantity just can be furnished with transmitting equipment, the aboveground down-hole still cannot known not in chamber after having an accident
Personnel's situation, so ground through communication system also cannot meet mine emergency communication needs.For ensureing the life security of personnel in the pit
And solve problem above, need new emergent radio communication system, it is possible to avoid when disaster occurs due to communication, power supply electricity
The damage of cable and cause aboveground with down-hole communication disruption, it is ensured that after down-hole disaster occurs, can be down-hole trapped personnel with
Rescue personnel provides communication and positioning service reliably, can be video and sensor device offer data link communication service simultaneously.
Summary of the invention
Present invention aim at providing a kind of mine emergency communication and alignment system, system mainly include underground radio communication network and
Emergent radio communication network；When cordless communication network normally works, cordless communication network provide radio communication with fixed for system
Position service；When cordless communication network cannot normally work, emergent radio communication network provide radio communication and location for system
Service；Cordless communication network passes through radio reception device by the mobile radio terminal equipment access network of down-hole；Radio reception device
Keep at a certain distance away in underworkings installation；Radio reception device is powered by cable；Emergent radio communication network is by radio node
Equipment forms；Wireless node apparatus uses wireless multi-hop communication mode；Wireless node apparatus is installed adjacent to radio reception device；Nothing
Line node device internal battery, is used wireless mode to charge it by radio reception device；Wireless node apparatus acquiescence is in province
Electricity duty；Wireless node apparatus can be activated by mobile radio terminal equipment or neighbouring device and enter normal operating conditions, and group
Emergent radio communication network is become to provide wireless emergency communication and positioning service for system；Wireless node apparatus is in power saving duty
Time lower, only receive wireless signal and do not send wireless signal；Wireless node apparatus is activated after entrance normal operating conditions, has had
Whole transmission reception and networking function；After the radio reception device being activated completes this time to communicate, automatically into power saving duty；
Emergency communication can be initiated by mobile radio terminal equipment, it is possible to is initiated by aboveground communication equipment.
1. described in, system farther includes: wireless node apparatus shell includes top and bottom, is close to install bottom wireless node apparatus
Face is fixed, and shell section should have following characteristics, and side is streamlined, and top does not has acute angle or right angle, bottom and top
Angle, boundary is acute angle；Top material could be used without the high temperature resistant heat insulation material of radio signal shielding effect；Base material uses
There is the material of good heat conductive characteristic；Wireless node apparatus shell has water-proof function.
2. described in, system farther includes: when mobile radio terminal equipment needs uplink communication, first mobile radio terminal equipment activate
Wireless node apparatus in its communication range, wireless node apparatus activates the adjacent wireless node equipment on uplink communication direction,
Activate, by relay mode, the required all wireless node apparatus that communicate on up direction step by step, complete the required link that communicates
Network environment is set up；When system needs downlink communication and location, same employing relay active mode activates communication or location institute
The all wireless node apparatus needed, the network environment needed for completing communication or location is set up；After this has communicated, nothing
Line node device is automatically into power saving duty.
3. described in, system farther includes: radio reception device connects the substation of affiliated area by the communications cable and power cable, by
This substation provides power supply and cable network access service for the radio reception device in this region is unified；Substation is connect by cable
Enter mining cable network.
4. described in, system farther includes: the cable connecting radio reception device uses leaky cable.
5. described in, system farther includes: radio reception device can be directly connected to cable network, it is possible to use wireless multi-hop communication mode
Networking.
6. described in, system farther includes: radio reception device can be simultaneously for multiple wireless node apparatus wireless powers；Wireless access sets
Standby periphery can install multiple wireless node apparatus.
7. described in, system farther includes: mobile radio terminal equipment include mobile phone, locator card, have radio communication function mine lamp,
There is the portable instrument of radio communication function and other has the equipment of radio communication function.
8. described in, system farther includes: mobile radio terminal equipment is provided with emergency call button, for activating the nothing in communication zone
Line node device.
9. described in, system farther includes: when equipment is installed, and should ensure fed antenna and the wireless joint of periphery of radio reception device as far as possible
The electric energy reception antenna direction of point device is relative.
10. described in, system farther includes: wireless node apparatus is installed on tunnel sidewall or top and well bore wall, it is possible to be installed on tunnel
Sidewall or top and well bore wall is firm and in the validity period of tunnel on the affiliated facility of permanent reservation.
Accompanying drawing explanation
Fig. 1 mine emergency communication implements schematic diagram 1 with alignment system.
Fig. 2 mine emergency communication implements schematic diagram 2 with alignment system.
Fig. 3 radio reception device is for electrical schematic.
Fig. 4 radio reception device and wireless node apparatus installation site schematic diagram.
Fig. 5 radio reception device is installed and cross-sectional view with wireless node apparatus.
Fig. 6 radio reception device principle composition schematic diagram.
Fig. 7 wireless node apparatus principle composition schematic diagram.
The mobile radio terminal equipment of Fig. 8 down-hole initiates the working-flow figure of communication.
The working-flow figure of the mobile radio terminal equipment communication of Fig. 9 uphole equipment calling down-hole.
Detailed description of the invention
The detailed description of the invention 1 of described communication and alignment system is as it is shown in figure 1, composition includes:
1. monitor terminal (101), by underground radio communication network or emergent radio communication network and downhole wireless mobile terminal
Equipment (106) two-way communication.
2. switch (102), are responsible for the data exchange of the equipment of all access network based on ethernet, are responsible for underground radio communication net simultaneously
Network management and the access of emergent radio communication network.
3. radio reception device (103), being responsible for setting up cordless communication network provides wireless connecing for downhole wireless mobile terminal device
Enter service；And by wireless power mode be wireless node apparatus (104) power, by power cable from AC/DC
Electricity conversion equipment (105) obtains direct current energy.
4. wireless node apparatus (104), are responsible for when cordless communication network cannot normally work setting up emergent radio network；Nothing
Line node device acquiescence is in power saving duty, can be set by mobile radio terminal equipment (106) and adjacent other
Standby activation enters normal operating conditions, auto-returned power saving duty after communication completes.
5. AC/DC electricity conversion equipment (105), down-hole AC power being converted to direct current by power cable is wireless access
Equipment (103) is powered；As used ac power supply method, radio reception device directly connects down-hole AC power, the most not
Need AC/DC electricity conversion equipment.
6. mobile radio terminal equipment (106), including mobile phone, locator card, have the mine lamp of radio communication function, have nothing
The portable instrument of line communication function has the equipment of radio communication function with other, is provided with emergency call button, is used for
Activate the wireless node apparatus (104) being in power down mode in communication zone.
Fig. 2 show described communication with alignment system at inclined shaft, the embodiment schematic diagram of footrill.
The embodiment of the power supply mode of radio reception device is as it is shown on figure 3, use and power on block supply cable, and power supply is by this
AC/DC electricity conversion equipment (105) in region is provided separately.
Fig. 4 is radio reception device and wireless node apparatus installation site schematic diagram in tunnel, radio reception device (103) with
Wireless node apparatus (104) adjacent installation.
Fig. 5 is that radio reception device is installed and cross-sectional view with wireless node apparatus, including:
1. anchor pole (201), are used for fixedly mounting wireless node apparatus, go deep into inside wall, make bottom wireless node apparatus tight
Patch mounting plane is fixed, and accident can effectively prevent wireless node apparatus from coming off when occurring.
2. wireless node apparatus outer casing bottom (202), are used for carrying and installing each parts of wireless node apparatus, use and have well
The material of heat conductivility, and there is water-proof function, can be enterprising to the medium of bottom contact by the conduction of device interior heat
Row heat loss through conduction.
3. wireless node apparatus cover top portion (203), in streamlined, material could be used without the high temperature resistant of radio signal shielding effect
Heat-barrier material, and there is water-proof function.
4. wireless node apparatus mainboard fixed copper post (204), for supporting and fixed wireless node device mainboard (203), totally 4
Individual, it is fixed on bottom wireless node apparatus.
5. wireless node apparatus battery (205), are arranged on wireless node apparatus outer casing bottom.
6. wireless node apparatus mainboard (206), form component including all of wireless node apparatus in addition to antenna, are arranged on electricity
Above pond, with battery interval a certain distance.
7. wireless node apparatus communication antenna (207), FPC board type antenna uses flexible special patchcord to connect with the IPX on mainboard
Mouth connects.
8. wireless node apparatus is powered reception antenna (208), launches antenna (210) with radio reception device relative.
9. expansion bolt (209), are used for installing fixed wireless access equipment.
10. radio reception device is powered transmitting antenna (210), installs against shell wall, powers reception sky with wireless node apparatus
Line (208) direction is relative.
11. radio reception device mainboards (211), including except power supply launch antenna (210), DC voltage modular converter (212),
The inside composition component of all radio reception devices beyond communication antenna (214).
The DC voltage modular converter (212) of 12. radio reception devices.
13. radio reception device shells (213), could be used without the material of radio signal shielding effect.
14. radio reception device communication antennas (214).
The hardware being illustrated in figure 6 radio reception device mainly comprises, including:
1. processor (301), use Atheros AR7161 radio network processing, operating frequency 600Mhz.
2. memory cell (302)；Including flash memory and random access memory.Flash memory uses 32M Flash；Random storage
Device uses 128M SDRAM.
3. wireless communication unit (303): include wireless communication module and antenna.Wireless communication module acp chip uses Atheros
AR9220, supports 2.4/5GHz double frequency IEEE802.11g/n；Support 2x2 MIMO multichannel space propagation technology；
Support that launching power adjusts；Support dynamically to select frequency；Peak power output 100mW, MIMO adds up to power output
200mW.Using external antenna, the IPX interface drawn with AR9220 on mainboard by flexible special patchcord is connected,
Maximum gain is not less than 3.5dBi.
4. Landline communication unit (304): include wire communication module and communication interface.Wire communication module acp chip uses
Atheros AR8035, supports gigabit Ethernet.Communication interface uses standard ethernet communication interface.
5. power subsystem (305): include DC voltage modular converter input direct voltage 24V, export DC voltage 12V and 3.3V.
DC voltage modular converter is responsible for main board power supply, and AC/DC modular converter is also responsible for wireless charging unit and powers.
During as used direct current supply mode, AC/DC modular converter can be saved.
6. wireless power unit (306): include that wireless power is launched management module and launches antenna.Wireless power launches management mould
Block uses XKT-830B module, launches input voltage 12V.Launch antenna and use ring-shaped emission coil, coil outer diameter
48mm, internal coil diameter 30mm, coil thickness 0.6mm.
It is illustrated in figure 7 the hardware composition schematic diagram of wireless node apparatus, mainly comprises and include:
1. processor (401), use Atheros AR7161 radio network processing, operating frequency 600Mhz.
2. memory cell (402)；Including flash memory and random access memory.Flash memory uses 32M Flash；Random storage
Device uses 128M SDRAM.
3. wireless communication unit (403): include wireless communication module and antenna.Wireless communication module acp chip uses Atheros
AR9220；Antenna uses FPC template built-in aerial, by flexible special patchcord and AR9220 extraction on mainboard
IPX interface connects, and maximum gain is not less than 3.5dBi.
4. the wireless node apparatus exported near tunnel, in addition to playing the effect of the wireless access of mobile radio terminal equipment, also has
Emergent radio communication network is accessed the function of aboveground cable network, so this wireless node apparatus has wire communication
Unit.Landline communication unit (404) includes wire communication module and communication interface.Wire communication module acp chip
Use Atheros AR8035, support gigabit Ethernet.Communication interface uses standard ethernet communication interface.
5. power subsystem (405): include the conversion of battery, voltage and battery charging and discharging administrative section, battery uses lithium ion electric power storage
Pond, lithium battery should have anti-reverse function, has outside internal protection circuitry, has and has outer protection circuit, possesses anti-mistake
Fill, anti-mistake is put, cross the function such as stream, short circuit, also equalizaing charge, balanced discharge function.Voltage conversion is responsible for will
Lithium battery output voltage is converted to other unit components required voltage, uses MAX1724 power supply chip.Battery charges
Higher management chip uses CS0301 lithium cell charging managing chip.
6. wireless power unit (406): include that wireless power receives management module and reception antenna.Wireless power receives management mould
Block uses XKT-830B receiver module, and reception antenna uses loop coil, receives coil outer diameter 30mm, internal coil diameter
15mm, coil thickness 0.6mm.
When cordless communication network cannot normally work, as downhole wireless mobile terminal device initiates communication, the work of described system
Flow process is as shown in Figure 8:
1. (501) press emergency call button and the call number of mobile radio terminal equipment, and mobile radio terminal equipment sends
Network link sets up request.
2. the wireless node apparatus that (502) are nearest receives mobile radio terminal device network request for building link, such as radio node
Equipment is in power down mode, then proceed to normal operating conditions from power down mode.
3. the route of (503) wireless node apparatus inquiry called device.
4. (504) wireless node apparatus judges network link direction, if called device is by this wireless node apparatus according to route
Access, then perform (507)；Route progression such as called device is relatively low, then perform (505)；As called sets
Standby route progression is higher then performs (506).
5. (505) wake up the wireless node apparatus being in power down mode on up direction successively up, until called region
Wireless node apparatus, if called device is uphole equipment, then wakes up all wireless node apparatus of up direction up.
6. (506) wake up the wireless node apparatus being in power down mode on down direction successively up, until called device location
The wireless node apparatus in territory.
7., after (507) network link equipment needed thereby is all waken up, set up the network link between calling device and called device.
8. (508) calling device and called device are communicated by network link.
9. (509) calling device or either one active of called device terminate communication, or it is countless to exceed setting time network link
According to communication, then disconnect network link.
10., after (510) disconnect the network link delay setting time, on this network link, original place sets in the radio node of power down mode
For again proceeding to power down mode.
When cordless communication network cannot normally work, as uphole equipment initiates the communication of the mobile radio terminal equipment with down-hole,
The workflow of described system is as shown in Figure 9:
1. the mobile radio terminal equipment of (601) uphole equipment calling down-hole.
2. the network link of the wireless node apparatus reception uphole equipment that (602) access cable network sets up request.
3. the route of (603) wireless node apparatus inquiry called device.
4. (604) wake up the wireless node apparatus being in power down mode on down direction successively up, until called device location
The wireless node apparatus in territory.
5., after (605) network link equipment needed thereby is all waken up, set up the network link between calling device and called device.
6. (606) calling device and called device are communicated by network link.
7. (607) calling device or either one active of called device terminate communication, or it is countless to exceed setting time network link
According to communication, then disconnect network link.
8., after (608) disconnect the network link delay setting time, on this network link, original place sets in the radio node of power down mode
For again proceeding to power down mode.
Claims (11)
1. a mine emergency communication and alignment system, it is characterised in that: system mainly includes underground radio communication network and emergent nothing
Line communication network；When cordless communication network normally works, cordless communication network provide radio communication and location for system
Service；When cordless communication network cannot normally work, emergent radio communication network provide radio communication with fixed for system
Position service；Cordless communication network passes through radio reception device by the mobile radio terminal equipment access network of down-hole；Wireless connect
Enter equipment to keep at a certain distance away in underworkings installation；Radio reception device is powered by cable；Emergent radio communication network
It is made up of wireless node apparatus；Wireless node apparatus uses wireless multi-hop communication mode；Wireless node apparatus connects adjacent to wireless
Enter equipment to install；Wireless node apparatus internal battery, is used wireless mode to charge it by radio reception device；Wireless
Node device acquiescence is in power saving duty；Wireless node apparatus can be activated by mobile radio terminal equipment or neighbouring device
Enter normal operating conditions, and form emergent radio communication network for system offer wireless emergency communication and positioning service；Nothing
When line node device is under power saving duty, only receives wireless signal and do not send wireless signal；Wireless node apparatus quilt
Activate after entering normal operating conditions, there is complete transmission reception and networking function；The radio reception device being activated is complete
After becoming this time communication, automatically into power saving duty；Emergency communication can be initiated by mobile radio terminal equipment, it is possible to by
Aboveground communication equipment is initiated.
2. communication as claimed in claim 1 and alignment system, it is characterised in that: wireless node apparatus shell includes top and bottom,
Being close to installed surface bottom wireless node apparatus fix, shell section should have following characteristics, and side is streamlined, and top does not has
Having acute angle or right angle, bottom and angle, boundary, top are acute angle；Top material could be used without the resistance to height of radio signal shielding effect
Temperature heat-barrier material；Base material uses the material with good heat conductive characteristic；Wireless node apparatus shell has water-proof function.
3. communication as claimed in claim 1 and alignment system, it is characterised in that: when mobile radio terminal equipment needs uplink communication,
First mobile radio terminal equipment activate the wireless node apparatus in its communication range, and wireless node apparatus activates uplink communication
Adjacent wireless node equipment on direction, activates, by relay mode, the required all wireless joint that communicates on up direction step by step
Point device, the network environment of the required link that completes to communicate is set up；When system needs downlink communication and location, same employing connects
Power active mode activates all wireless node apparatus needed for communication or location, completes the network environment needed for communication or location
Set up；After this has communicated, wireless node apparatus is automatically into power saving duty.
4. communication as claimed in claim 1 and alignment system, it is characterised in that: radio reception device passes through the communications cable and power supply
Cable connects the substation of affiliated area, this substation provide power supply and wired network for the radio reception device in this region is unified
Network access service；Substation accesses mining cable network by cable.
Communication the most as claimed in claim 1 and alignment system, it is characterised in that: the cable connecting radio reception device uses leakage
Let out cable.
Communication the most as claimed in claim 1 and alignment system, it is characterised in that: radio reception device can be directly connected to wired network
Network, it is possible to use wireless multi-hop communication mode networking.
7. communication as claimed in claim 1 and alignment system, it is characterised in that: radio reception device can be multiple wireless joints simultaneously
Point device wireless power；Radio reception device periphery can install multiple wireless node apparatus.
8. communication as claimed in claim 1 and alignment system, it is characterised in that: mobile radio terminal equipment includes mobile phone, location
Card, there is the mine lamp of radio communication function, there is the portable instrument of radio communication function and other has radio communication function
Equipment.
9. mobile radio terminal equipment as claimed in claim 1, it is characterised in that: mobile radio terminal equipment is provided with urgent call
Button, for activating the wireless node apparatus in communication zone.
10. communication as claimed in claim 1 and alignment system, it is characterised in that: when equipment is installed, wireless access should be ensured as far as possible
The fed antenna of equipment is relative with the electric energy reception antenna direction of periphery wireless node apparatus.
11. communicate and alignment system as claimed in claim 1, it is characterised in that: wireless node apparatus is installed on tunnel sidewall or top
Portion and well bore wall, it is possible to be installed on tunnel sidewall or top and well bore wall is firm and permanent reservation in the validity period of tunnel
Affiliated facility on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610291912.8A CN105873002B (en) | 2016-05-05 | 2016-05-05 | Mine emergency communication and positioning system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610291912.8A CN105873002B (en) | 2016-05-05 | 2016-05-05 | Mine emergency communication and positioning system |
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| CN105873002A true CN105873002A (en) | 2016-08-17 |
| CN105873002B CN105873002B (en) | 2022-02-18 |
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| CN201610291912.8A Active CN105873002B (en) | 2016-05-05 | 2016-05-05 | Mine emergency communication and positioning system |
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| CN107613580A (en) * | 2017-10-19 | 2018-01-19 | 中国矿业大学(北京) | Combat a natural disaster to become mine emergency communication system |
| 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 |
| CN108955672A (en) * | 2018-06-07 | 2018-12-07 | 重庆交通大学 | A kind of tunnel grouting slurries track monitoring system and method |
| CN108955672B (en) * | 2018-06-07 | 2021-02-02 | 重庆交通大学 | Tunnel grouting slurry track monitoring system and method |
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