CN201003413Y - Down-hole safe alarming and personnel management device for coal mine - Google Patents
Down-hole safe alarming and personnel management device for coal mine Download PDFInfo
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- CN201003413Y CN201003413Y CNU2007200039488U CN200720003948U CN201003413Y CN 201003413 Y CN201003413 Y CN 201003413Y CN U2007200039488 U CNU2007200039488 U CN U2007200039488U CN 200720003948 U CN200720003948 U CN 200720003948U CN 201003413 Y CN201003413 Y CN 201003413Y
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- 238000004891 communication Methods 0.000 claims abstract description 16
- 239000000428 dust Substances 0.000 claims abstract description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910002091 carbon monoxide Inorganic materials 0.000 claims abstract description 7
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
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Abstract
The utility model relates to safety alarm and personnel management in a coal mine well underground, pertaining to radio frequency and wireless radio transmission technical field. The monitoring center sever regarding the utility model is connected with and read data from an electronic card trench scanner; the electronic cards borne by the workers underground in the well send or receive signals through dual range waveband antenna, the wireless communication network and the server of the monitoring center. In this way, the utility model provides a comprehensive wireless digital system integrating wireless supervising, personnel positioning, environmental monitoring and production management; Compared with the prior art, the utility model has advantages: utilize RFID(radio frequency identification) technology, and computer network technology, providing an applicable solution to the mine and the working site underground at a well unmonitorable condition in the prior art. The electronic card comes in high density of integration at small volume, utilizing a plurality of sensor modules to collect relevant data regarding carbon monoxide, methane, temperature, dust, humidity, and pressure etc. into the card, and send the data to the server through the dual range waveband antenna after being processed by the processor.
Description
One, technical field
The utility model relates to coal mine downhole safety reports to the police and the personal management device, belongs to radio-frequency technique and wireless transmission, computer network field.
Two, background technology
In recent years, the many large and medium-sized coal enterprise of China have all built up the LAN of oneself in succession, and have developed management information systems such as finance, occurrences in human life and supply, and the operation of these systems has improved the managerial skills of coal enterprise.But with regard to the colliery, trouble free service is most important, the severeest problem that coal enterprise faces all the time, a recent period of time particularly, the particularly serious accident in colliery, the whole nation frequently takes place, and has seriously restricted the normal development of coal enterprise, has also damaged the social image of coal enterprise greatly.For the monitoring that Strengthens Safety Management, existing technology is through sensor signal to be sent to the monitoring central server, the monitoring central server carries out analyzing and processing to data again, have plenty of wired or Optical Fiber Transmission, this is just to real-time, and when caving in to personnel's location, searching and rescuing has just had restriction.
Three, summary of the invention
The technical problem that the utility model solves is: realize all personnels in the pit are carried out wireless monitor, report to the police and the personal management device from a kind of coal mine downhole safety of motion tracking, personnel positioning, Environmental Monitoring, production management.
Technical solution: by the monitoring central server, tunnel electronic cards scanner, electronic cards is formed, the monitoring central server is connected with tunnel electronic cards scanner, the monitoring central server is connected with network by the cabled digital communication and is connected with tunnel electronic cards scanner and reads data, tunnel electronic cards scanner is sent to the monitoring central server to signal by the microwave antenna matrix through the wireless telecommunications net, and the electronic cards that the personnel in the pit wore by dual-band antenna through wireless telecommunications net and monitoring central server transmitt or receive signal, electronic cards is provided with sensing module, sensing module is connected the back and is connected with microprocessor with A/D and signal processing circuit, microprocessor is connected with the electronic cards sound light alarming circuit, microprocessor is connected with RFID electronic label chip group, the electronic label chip group is connected with the two waveband microwave antenna through a power amplifier, electronic cards be provided with battery.
Electronic cards by the wireless telecommunications net with the monitoring central server directly be connected, the monitoring central server be connected with outdoor display screen, emergency alarm, relay control module, relay control module is connected with other hardware modules.
Sensing module is provided with methane transducer, carbon monoxide transducer, temperature pick up, pressure sensor, air velocity transducer, humidity sensor, dust sensor.
Dual-band antenna, microwave antenna matrix can be provided with a group or more.
Two or more electronic cards scanners are set in the adit opening.
It is that the comprehensive wireless of one is system digitalized that the utility model has been finished wireless monitor, personnel positioning, Environmental Monitoring, production management function, this system have traditional mine monitoring, monitoring system incomparable superiority, utilize RFID (radio frequency identification) technology, computer networking technology, the communication mode that connects with other procotols, the feasibility solution that provides mine and even underground work face to monitor are provided in employing.This electronic cards integrated level height, volume are urinated in carrying, and utilize the several sensors module that related datas such as CO gas, methane gas, temperature, dust, humidity, pressure are read in the card treated device and handle and send to server by dual-band antenna.
In addition, this system also has the microwave antenna matrix that is connected with the monitoring central server, is used to finish the two-way data communication between electronic cards and the monitoring central server.This system is applicable to the toxic gas of various underground work faces, the automatic monitoring of dust and warning and personnel in the pit's management.Its characteristics are as follows:
1, this device electronic cards that all personnel is worn carries out upgrading its content from motion tracking, registration, timely modification.This management system can be carried out read-write operation to electronic cards at a distance.The all personnel who enters the operation area is carried out from motion tracking.
2, this device can read at a distance to all sensing module data of electronic cards configuration.
3, this device can initiatively carry out various promptings to the personnel of wearing by the acousto-optic circuit on the electronic cards.
4, this device can be estimated electronic cards approximate location of living in by multi-set parallel microwave antenna matrix.
5, the various data that this device provided are carried out in good time whole system and are effectively reported to the police.
6, the various data that provide of this device are carried out necessary security protection response to the residing environment of system, such as temperature, pressure, humidity, air flux, toxic gas are exceeded standard and take measures necessary.
7, this device is integrated with multiple toxic gas sensor, and these sensors can comprise CO gas sensor, methane gas sensor, temperature pick up, dust sensor, humidity sensor, pressure sensor.
When 8, some output of the sensor on this device exceeded desired indicator, the electronic cards warning circuit can be reported to the police to the monitoring central server by the two waveband microwave antenna.Simultaneously, the sound light alarming circuit output alarm signal on electronic cards.
9, this installs this electronic cards and is integrated with microwave electron communication subsystem based on the RFID technology.This subsystem with and the direct-connected RFID total system sending and receiving that belong to consolidated network of monitoring central server receive the network bi-directional communication, exchange data.In case the request of reporting to the police number or receiving the monitoring central server is arranged, and electronic cards will be sent desired alarm signal or data according to communications protocol.With reference to above electronic cards schematic diagram, deliver to microprocessor on the electronic cards from the signal of various sensors through A/D and signal processing circuit, report to the police and various data receive signalling via affiliated RFID drive circuit to total system RFID by the RFID chipset.Various command from the monitoring central server is delivered to microprocessor by the RFID chipset, according to specific requirement, microprocessor is gathered needed data, and then pass through the RFID chipset and signal to total system RFID reception via affiliated RFID drive circuit, desired data are finally returned to the monitoring central server.
10, the content of this device electronic cards can be carried out non-contact type rewriting, editor by the scanner of same system.Write operation to RF tag carries out under certain authorization control
11, in this device all personnel that go into the well that wear this electronic cards earlier through adit opening electronic cards scanner, the information on the electronic cards thereby be collected and be recorded in the monitoring central server database.
12, after this device personnel to electronic cards of wearing enter the tunnel, enter in the monitoring range of electronic scanning system in the tunnel.The both-way communication of total system and subsystem can be regularly, also can be continuously-running duty.
13, the control circuit of this device total system scans by simulant electronic switch fast to the microwave matrix antenna that it disposed, and its function is: collect from the various alarm signals of electronic cards and to the response message of the various command of monitoring central server; Simultaneously, calculate according to relative RF signal strength all electronic cards in its sweep limits, in conjunction with of the contrast of relatively accepting intensity and the analysis of microwave matrix antenna, can roughly estimate the particular location of this electronic cards in the tunnel to a certain warning electronic cards radiofrequency signal.
14, this device monitoring central server also can send various instructions to all or part electronic cards according to the various information of collecting from total system.The total system that is connected with the monitoring central server also is equipped with various sensing module and the warning devices that are independent of electronic cards simultaneously.In case the monitoring central server detects a certain or some alarm signal, then can send warning message by the total system warning circuit immediately.
15, the electronic scanning system controlled of this device monitoring central server can scan simultaneously to a plurality of electronic cards, its principle is to have utilized many labels read-write anti-collision principles and two scanner relays chronologically to start scan functions, and electronic cards number and sweep limits that this design makes the total system sweep speed, be scanned all obtain enlarging.Design for this system, the encryption and the safety of sequential system, communication handshake, Frame, data coding, the integrality of data, many labels read-write anti-collision, interference and anti-interference, recognition rate and the bit error rate, data, the various interface between read write line and the application system all is the problem that will properly settle.Native system has intactly been considered above variety of issue, at the particularity of environment under the mine, mainly stresses to have solved the problem of sequential system and the various interface problem between read write line and the application system.Interface problem wherein sixty-four dollar question is the relay point data transmission of microwave matrix antenna and the strength vector Distribution calculation problem of received signal.The solution of these problems makes that electronic cards approximate location estimation problem is properly settled.
16, this device native system can be realized personnel in the pit's work attendance, Workload Account, salary is provided, management work such as sick leave and leave of absence management, IC-card management system commonly used is at present compared, native system can be realized the personnel's of going into the well single swiping the card of need not getting off, and can carry out 50 above workmans' identification simultaneously at the car of going into the well, and has saved workman's identity before going into the well greatly and has signed other time.Because the unicity of the identity of each chip, can realize modern management such as receiving such as workload calculating, work attendance calculating, salary granting, article with the network system for managing coupling.
17, the alarm of this device downhole safety with save oneself.Native system adopts international advanced technology monitoring gas and other pernicious gases, can carry out simultaneously monitoring to hostile environments such as dust, and can on electronic cards, realize light and buzzer warning, can realize that workman oneself keeps away evil and mutual notice and urgent externally warning.In a single day the native system electronic cards is active signal, when mine disaster taking place, can also carry out rescue work timely and effectively according to signal strength.
18, this device electronic cards utilizes several sensors that related datas such as CO gas, methane gas, temperature, dust, humidity, pressure are read in the interior treated device processing of card by being wirelessly transmitted to server, realizes monitoring, reports to the police management integration.
19, this device adapts to bad working environment, not influenced by variations in temperature and dust, durability, reliability, accuracy height.This device can detect gas density in real time, CO concentration, and wind speed, temperature, dust, pressure, relevant parameters such as acousto-optic, the transmission precision height, antijamming capability is strong.Realize intelligent monitoring and management system.
20, this device easy operating, simple installation, indicative strong, the personnel in the pit can initiatively obviously point out or auditory tone cues the personnel of wearing by the acousto-optic circuit on the electronic cards.
21, this device can the long-range detection parameter and based on multi-set parallel microwave antenna matrix electronic cards approximate location of living in is estimated.This electronic cards is integrated with the microwave electron communication subsystem based on the RFID technology.This subsystem with and the direct-connected RFID total system sending and receiving that belong to consolidated network of monitoring central server receive the network bi-directional communication, exchange data.
22, this device electronic cards can deposit various user profile in.These information comprise the userspersonal information, information under the user job post, and temporal information, historical record of the various data that write down on the electronic cards that the user carries or the like can expand as required.
23, this device monitoring central server has been realized non-wait scanning in the bielectron card scanner relay chronologically scanning of adit opening setting, electronic cards number that is scanned and sweep limits all obtain enlarging, and big raising the personnel in the pit go into well speed, promoted operating efficiency.
24, this device adopts the Li battery, can be durable for a long time.The dust probe of this system adopts infrared probe, and temperature pick up can adopt AD590, but the air velocity transducer micro-pressure sensor, and the carbonic oxide sensor can adopt multiple micro semiconductor solid probe such as MGS1100 solid semiconductor probe.
25, the various data that this apparatus system provided are carried out in good time whole system and are effectively reported to the police, emergent emergency call system.This information is transferred to information processing centre, even cave in, change needed artificial warning in the past, changed radio-frequency card transmission information into and reported to the police.
26, high cost performance.Because it is highly integrated that native system has adopted, thereby many purposes are realized on same equipment, effectively saved cost, helps promoting on a large scale.
Four, description of drawings
Fig. 1 is the utility model general construction schematic diagram;
Fig. 2 is the utility model service end control hardware structured flowchart;
Fig. 3 is the utility model electronic cards hardware configuration schematic diagram;
The bielectron card scanner schematic diagram that Fig. 4 is provided with in the adit opening for the utility model monitoring central server;
Fig. 5 is the utility model wireless radio frequency circuit figure;
Five, the specific embodiment
The utility model monitoring central server 1 is connected with tunnel electronic cards scanner 4, monitoring central server 1 is connected 3 by cabled digital communication 2 and reads data from tunnel electronic cards scanner 4 with network, the adit opening is provided with two electronic cards scanners 4, electronic cards scanner 4 is sent to monitoring central server 1 to signal by microwave antenna matrix 5 through wireless telecommunications net 7, and the electronic cards 8 that the personnel in the pit wore by dual-band antenna 6 through wireless telecommunications net 7 and monitoring central server 1 transmitt or receive signal, electronic cards 8 is provided with sensing module 10, sensing module 10 is connected the back and is connected with microprocessor 12 with A/D and signal processing circuit 11, microprocessor 12 is connected with electronic cards sound light alarming circuit 13, microprocessor 12 is connected with electronic label chip group 14, electronic label chip group 14 is connected with two waveband microwave antenna 6 through a power amplifier 15, and electronic cards 8 is provided with battery.
Sensing module 10 comprises: methane transducer, carbon monoxide transducer, temperature pick up, pressure sensor, air velocity transducer, humidity sensor, dust sensor.
Dual-band antenna 6, microwave antenna matrix 5 can be provided with a group or more.
The utility model as shown in Figure 2, electronic cards 8 is connected with monitoring central server 1 by wireless telecommunications net 7, guards central server 1 and can in time take measures.Monitoring central server 1 is connected with outdoor display screen 16, emergency alarm 17, relay control module 19, and relay control module 19 starts other hardware modules 20 (as exhaust fan).With monitoring central server 1 is that one of core formation possesses functional integrity systems such as data acquisition, object control, result's demonstration, data communication.
Be provided with in the sensor assembly 10 and be methane transducer, carbon monoxide inductor, 8 is electronic cards, 11 is A/D and signal processing circuit, 12 is microprocessor, 14 is electronic label chip group RFIDchipset, and 15 is power amplifier, and 13 is the electronic cards sound light alarming circuit, 9 is lithium battery, and 6 is the two waveband microwave antenna.Each sensor in the sensor assembly 10 pass to A/D modulus signal treatment circuit 11 to signal, and microprocessor 12 transmits signals with electronic label chip group 14, through power amplifier 15 signal are amplified, and come receiving and transmitting signal by two waveband microwave antenna 6 at last.
Integrated sensing module 10 can be to coal mine gas gas (carbon monoxide, methane gas) in the electronic cards 8.Automatically monitor, if wherein a kind of or two kinds of gases exceed standard, then system reports to the police to the monitoring central server by two waveband microwave antenna 6.Simultaneously the down-hole relevant personnel are reported to the police.This system also can effectively monitor all kinds of particulates such as dust.Carbonic oxide sensor wherein can adopt multiple micro semiconductor solid probe such as MGS1100 solid semiconductor probe.The SnOB2B film of the effective original paper of this kind probe for forming on the heater that embeds in the miniature silicon dridge structure has sensitiveness to CO gas in very wide temperature range, silicon fiml also has less heat conduction loss simultaneously.Its operating principle is that the resistance of SnOB2B thin layer can change along with the variation of CO concentration, and CO concentration is big more, and SnOB2B thin layer resistance is more little.The integrated form methane probe of this system also adopts multiple solid semiconductor element.Sensing original paper such as QM family.Such material has high susceptibility and stability to CH4.The similar carbonic oxide sensor of operating principle.The dust probe of this system adopts infrared probe.These electronic cards 8 systems adopt rechargeable type 1200mAh, 3.6 volts of lithium battery power supplies.Dual-band antenna 6 is connected with the monitoring central server by cable network, to guarantee the timely and reliability of data communication.Dual-band antenna 6 adopts multi-set parallel microwave antenna matrix 5 so that determine electronic cards 8 approximate location fast.
Such as: when running into methane gas and exceed standard, the methane transducer on the electronic cards, carbon monoxide inductor by A/D modulus and signal processing circuit 11, trigger sound light alarming circuit 13 on the electronic cards through microprocessor 12, have different modes to show or buzzing.Represent that such as blinking red lamp CH4 exceeds standard, amber light shows that expression CO exceeds standard.The signal of electronic label chip group 14 amplifies signal through a power amplifier 15, through the 415/900M channel alarm signal is delivered to monitoring central server 1 by two waveband microwave antenna 6.The staff of monitoring central server 1 can judge fast that place of alarm takes positive action to.Monitoring central server 1 also can send various instructions to all or part electronic cards according to the various information of collecting from total system.The total system that is connected with monitoring central server 1 also is equipped with various sensing module and the warning devices that are independent of electronic cards simultaneously.In case monitoring central server 1 detects a certain or some alarm signal, then can send warning message by total warning circuit immediately.
As from 00001 to 00100 miner of numbering, everyone wears an electronic cards 8, everyone has unique identifier, tunnel electronic cards scanner 4 is installed at coal mine lower inlet place, when the down-hole is gone into by collective in the miner is sitting in mine car, can scan simultaneously, avoid miner's scanning that holds one by one, save a large amount of time.Here just used two scanning sequence system.
The both-way communication of total system and subsystem can be regularly, also can be continuously-running duty; The electronic scanning system that the monitoring central server is controlled can scan simultaneously to a plurality of electronic cards, and its principle is to have utilized many label read-write anti-collision principles and two scanner relay chronologically to start scan function, as shown in Figure 4.Electronic cards number that this design makes the total system sweep speed, be scanned and sweep limits all obtain enlarging.For the design of this system, sequential system, communication handshake, Frame, data coding, the integrality of data, many labels read-write anti-collision, interference and anti-interference, recognition rate and the bit error rate; The encryption of data and safety; Various interface between read write line and the application system all is the problem that will properly settle; Collect from the various alarm signals of electronic cards and to the response message of the various command of monitoring central server; Simultaneously, calculate according to relative RF signal strength all electronic cards in its sweep limits, in conjunction with of the contrast of relatively accepting intensity and the analysis of microwave matrix antenna, can roughly estimate the particular location of this electronic cards 8 in the tunnel to a certain warning electronic cards radiofrequency signal.Native system has intactly been considered above variety of issue, at the particularity of environment under the mine, mainly stresses to have solved the problem of sequential system and the various interface problem between read write line and the application system.Interface problem wherein sixty-four dollar question is the relay point data transmission of microwave matrix antenna and the strength vector Distribution calculation problem of received signal.The solution of these problems makes that electronic cards 8 approximate location estimation problems are properly settled.
The two scanning sequence system that this device adopts, schematic diagram as shown in Figure 4.
4 is that electronic cards scanner, 8 is electronic cards, and scanner can scan more than 50 people simultaneously.
The RFID wireless radio frequency circuit of electronic cards 8 is as shown in Figure 5:
MCU microprocessor 12 intercoms mutually with electronic label chip group 14, two waveband microwave antenna 6 is by wireless telecommunications net 7, frequency is at 415/900MHz, the TX of MCU microprocessor 12 sends data wire and links to each other with the speaker transmitter with the microphone microphone respectively with RX reception data wire, also can change LED light into, can change as required.Be convenient to the mutual of information.Wherein 3 IC integrated circuits are respectively the encoding and decoding processes to voice signal.
The DATA OUT data output pin of MCU microprocessor 12 and DATA IN data input pin are in order to send and received signal, and with the DATA IN data input pin of electronic label chip group 14, DATA OUT data output pin links to each other respectively.The D0 of electronic label chip group 14, D1, D2, D3 is 4 road I/O I/O channels, link to each other with 4 road I/O I/O channels of MCU microprocessor 12 respectively, electronic label chip group 14 receives data pin by RF OUT data output pin with the RX of MCU microprocessor 12 from two waveband microwave antenna 6 received signals and links to each other, and the TX of MCU microprocessor 12 sends data pin and links to each other with the sound collection IC, and the pin 5 of power amplifier integrate circuit IC links to each other with loudspeaker in addition.
Adopt two scanning sequence systems can effectively prevent from repeatedly to read in data, or the skip data.Tunnel electronic cards scanner 4 is connected 3 to the identifier data of reading in by cabled digital communication 2 information is sent to monitoring central server 1 with network, the information on the electronic cards 8 thereby be collected and be recorded in and guard in the central server database.
Be provided with database in the monitoring central server 1, be provided with system's setting, work attendance personal management storehouse, management map, real-time positioning, reception electronic cards information in the database, obtain information to electronic cards; Monitoring central server 1 is connected with database, reads the data information of the identifier in the work attendance personal management storehouse, and the identifier as 00021 can be found related data as name, sex, age, a series of data relevant with this identifier such as post.Guard central server 1 simultaneously and can monitor the pairing personnel in the pit's of certain identifier position.
Claims (7)
1, coal mine downhole safety is reported to the police and the personal management device, by monitoring central server (1), tunnel electronic cards scanner (4), electronic cards (8) is formed, it is characterized in that: monitoring central server (1) is connected with tunnel electronic cards scanner (4), monitoring central server (1) is connected (3) by cabled digital communication (2) and is connected with tunnel electronic cards scanner (4) and reads data with network, tunnel electronic cards scanner (4) is sent to monitoring central server (1) to signal by microwave antenna matrix (5) through wireless telecommunications net (7), and the electronic cards that the personnel in the pit wore (8) process dual-band antenna (6) is through wireless telecommunications net (7) and monitoring central server (1) transmitt or receive signal, electronic cards (8) is provided with sensing module (10), sensing module (10) is connected the back and is connected with microprocessor (12) with A/D and signal processing circuit (11), microprocessor (12) is connected with electronic cards sound light alarming circuit (13), microprocessor (12) is connected with electronic label chip group (14), the signal of electronic label chip group (14) is connected with two waveband microwave antenna (6) through a power amplifier (15), electronic cards (8) be provided with battery (9).
2, coal mine downhole safety according to claim 1 is reported to the police and the personal management device, it is characterized in that: electronic cards (8) directly is connected with monitoring central server (1) by wireless telecommunications net (7), monitoring central server (1) is connected with outdoor display screen (16), emergency alarm (17), relay control module (19), and relay control module (19) is connected with other hardware modules (20).
3, coal mine downhole safety according to claim 2 is reported to the police and the personal management device, it is characterized in that: other hardware modules (20) are exhaust system, fire prevention system.
4, coal mine downhole safety according to claim 1 is reported to the police and the personal management device, it is characterized in that: electronic label chip group (14) is RFID radio frequency electronic tag chipset.
5, coal mine downhole safety according to claim 1 is reported to the police and the personal management device, and it is characterized in that: sensing module is provided with methane transducer, carbon monoxide transducer, temperature pick up, pressure sensor, air velocity transducer, humidity sensor, dust sensor in (10).
6, coal mine downhole safety according to claim 1 is reported to the police and the personal management device, and it is characterized in that: dual-band antenna (6), microwave antenna matrix (5) can be provided with a group or more.
7, coal mine downhole safety according to claim 1 is reported to the police and the personal management device, it is characterized in that: tunnel electronic cards scanner (4) can be arranged in adit opening and the tunnel, and two or more electronic cards scanners can be set in adit opening and tunnel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200039488U CN201003413Y (en) | 2007-01-23 | 2007-01-23 | Down-hole safe alarming and personnel management device for coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200039488U CN201003413Y (en) | 2007-01-23 | 2007-01-23 | Down-hole safe alarming and personnel management device for coal mine |
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| Publication Number | Publication Date |
|---|---|
| CN201003413Y true CN201003413Y (en) | 2008-01-09 |
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| CNU2007200039488U Expired - Fee Related CN201003413Y (en) | 2007-01-23 | 2007-01-23 | Down-hole safe alarming and personnel management device for coal mine |
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Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101770009A (en) * | 2009-01-06 | 2010-07-07 | 西安西谷微功率数据技术有限责任公司 | New accurate and practical radio-frequency positioning technology |
| CN102003212A (en) * | 2010-11-02 | 2011-04-06 | 徐州翔和电气设备有限公司 | Multiple-point gas sensing detection system |
| CN102071970A (en) * | 2010-11-17 | 2011-05-25 | 无锡泰立特科技有限公司 | Multifunctional sensor in mine |
| CN102484469A (en) * | 2009-07-10 | 2012-05-30 | 威斯科数据安全国际有限公司 | Improved modulation and demodulation circuit |
| CN102505966A (en) * | 2011-11-23 | 2012-06-20 | 太原海斯特电子有限公司 | Accurate positioning method based on echo coherence effect |
| CN102587985A (en) * | 2012-02-27 | 2012-07-18 | 郭丰亮 | Coal mine alarming system based on LED (light-emitting diode) visible light communication |
| CN102799923A (en) * | 2012-07-17 | 2012-11-28 | 合肥工大高科信息科技股份有限公司 | Mine personnel electronic-tag with displaying and alarming functions and signal processing method thereof |
| CN103174461A (en) * | 2011-12-26 | 2013-06-26 | 盐城中煤亚太机电设备制造有限公司 | Intelligent anti-explosive interlocking device |
| CN103174460A (en) * | 2011-12-20 | 2013-06-26 | 上海众恒信息产业股份有限公司 | Radio frequency identification device (RFID) mine positioning system |
| CN103529095A (en) * | 2013-10-28 | 2014-01-22 | 新疆智翔科技有限公司 | Poisonous and harmful gas monitoring system |
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