CN101247560B - Short message terminal under coal mine and its application method - Google Patents
Short message terminal under coal mine and its application method Download PDFInfo
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- CN101247560B CN101247560B CN2008100658006A CN200810065800A CN101247560B CN 101247560 B CN101247560 B CN 101247560B CN 2008100658006 A CN2008100658006 A CN 2008100658006A CN 200810065800 A CN200810065800 A CN 200810065800A CN 101247560 B CN101247560 B CN 101247560B
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Abstract
A short message terminal under coal mine well and using method are provided, comprising: an explosion preventing keyboard group mounted on an explosion preventing casing, an industrial control bus interface of a network driving module connected with network; a receiving probe of an identity identifying module mounted below a light inlet window or a plastic part of the explosion preventing casing; a display screen mounted below the light inlet window of the casing to display the short message and to control the indicating character; a main control module connected with the network driving module, the button scanning circuit, the identity identifying module, the display screen and the Chinese character library. When using, firstly swiping the card at the short message terminal to read number of the card; then sending requiring request to the network to wait for reply; then network sends new short message or there is no information indicating. The explosion preventing keyboard group of the invention is small in size, good in handle, waterproof, dustproof and corrosion protecting. The short message terminal can be accessed to present monitoring system as a branch base so as to provide a new communication channel for the coal mine well and the commanding organ.
Description
Technical field
The present invention relates to the transmission of digital information, and in explosive gas atmosphere the mutual input on the electric equipment, typing character, message editor; Be particularly related to the visit common bus, information is in the transmission of common bus; Relate in particular to device with concentrated access control.
Background technology
In the prior art, the mobile phone or the note device that can send short message under conventional environment are various in style, innumerable, but these mobile phones or note device all are to come transmission signals at ground space by radio wave, these equipment all are not suitable for explosive gas atmosphere and use because of can't pass explosion-proof test.
For example under the coal mine, though explosion-proof dispatching telephone is arranged, with huge job site distribution, these dispatching telephone quantity are less relatively.And these phones can not move all in the fixed location installation.The mobile big personnel in a few thing post, down-hole, general work character is all important, handles some accidents if seek these mobile personnel by dispatching telephone, and the missing difficulty is bigger.
Moreover, when accident takes place, if disaster-stricken place dispatching telephone broken string or damage have just lost the passage of getting in touch with the higher level.
Though also bring into use radio telephone under the coal mine, but the natural conditions that are different from ground space under the coal mine, one comes coal geology to absorb very big to radio wave, it is not ideal that narrow job site is provided with the base station effect in the space, therefore support wireless telephonic base station mostly to be arranged on bigger main tunnel, space, and owing to the cost reason, what also the base station can not be provided with is very intensive.And often occurring in narrow job site, space in disaster, the scene of this moment needs most with the external world and gets in touch.
Under the coal mine Environmental security supervisory control system and personal security supervisory control system have been installed mostly at present, but have not also utilized existing system to realize that the equipment of the short message communication of complete explosion comes out so far.Need also want the dustproof and waterproof anticorrosion with the check of device housings by the standard-required of electric equipment under GB3836.1～4 explosion gas environment because realize the keyboard of short message communication, this has big difficulty technically.
Summary of the invention
The technical problem to be solved in the present invention is, avoid above-mentioned the deficiencies in the prior art part and propose a kind of short message terminal under coal mine and using method, the explosion-proof keyboard category that short message terminal of the present invention adopts is similar to the keyboard that uses on common computer, the mobile phone, the anticorrosion of the little good hand touch water proof and dust proof of volume.During use, each user need be stuck on the short message terminal with identification and swipe the card, and just can enter operational phase, and short message terminal is as a substation or insert existing detection system network, or networking voluntarily.When inserting existing detection system network, can make an equipment separately, also can with the shared same shell of existing checkout equipment, can narrow any job site, deep enough space, thus provide another new tunnel of communicating by letter for the working site with commanding agency.
The present invention helps production scheduling, is of value to safety in production and disaster relief.
The present invention realizes by adopting following technical scheme:
Manufacture and design a kind of short message terminal under coal mine, comprising:
One explosion-proof keyboard group is assemblied on the explosion-proof casing, and the lead-in wire of described explosion-proof keyboard group inserts key scanning circuit;
One network-driven module, its coffret are the industrial-controlled general line interfaces;
The message pick-up probe of one identity identification module is installed under the light inlet window or plastic cement part of explosion-proof casing;
One display screen is installed under the light inlet window of explosion-proof casing, shows short message and control prompting character;
One Hanzi font library, storage Chinese character, symbol, English character;
One main control module connects network-driven module, key scanning circuit, identification module, display screen Hanzi font library.
In the first embodiment, described short message terminal under coal mine is installed in the separate housing; After described explosion-proof keyboard group was assembled on the explosion-proof casing, shell integral body met GB 3836 explosive gas atmosphere electric equipment standard-requireds, and described terminal has unique station number.
In second execution mode, described short message terminal under coal mine is installed on multiplexing shell; After described explosion-proof keyboard group was assembled on the explosion-proof casing, shell integral body met GB 3836 explosive gas atmosphere electric equipment standard-requireds, and the short message terminal under coal mine in the multiplexing shell partly has independently unique station number.
Described message pick-up probe comprises RFID (Radio/Frequency Identification) wireless probe, radio-frequency card antenna, bar code reader, photelectric receiver.
Described coffret comprises RS485 bus interface, CAN (Controller Area Network) bus interface, WORLDFIP (world factory instrumentation protocol) bus interface, foundation fieldbus interface, Industrial Ethernet interface.
Described message pick-up probe reads the distance of identification card card number less than 40cm.
The using method of short message terminal under coal mine, described method comprises step:
1., at first on short message terminal, swiped the card, identification module reads the card number of identification card by the user;
2., main control module is according to card number, sends the inquiry request by the network-driven module to coffret, waits for that then network replys,
3., if having the new short message of this card number this moment in network, the short message that system is just new with all sends to this short message terminal; If this user's new short message not in the network, network just send one to this short message terminal and reply prompting accordingly;
4., after the user reads new short message or replys prompting, next the user to select be to desire the breath of sending short messages with explosion-proof keyboard group editor, transmission again; Still select to withdraw from operation.
Step is 2. described when coffret sends the inquiry request, comprises the station number, the user's card number that send short message terminal itself.
After the 1. described identification module of step read the card number of identification card, main control module retrieve stored district was shown that by display screen the historical note of this card number writes down catalogue, and the user selects whether to read historical record according to prompting.
After the 4. described user of step read new short message, main control module sent a return information by coffret to the letter substation, and this return information comprises station number, user's card number, the time for reading of short message terminal itself.
Compared with prior art, explosion-proof keyboard group volume of the present invention is little, good hand touch, and dustproof and waterproof, the keyboard typing that meets people is accustomed to, and is adapted at using in the explosive gas atmosphere.
The present invention utilizes existing supervisory control system network in colliery or special networking, utilizes existing identification card to form down-hole～aboveground short message communication network, and cost is low.
The present invention is for providing the passage of another scene except that dispatching telephone and commanding agency contact under the coal mine.
Description of drawings
Fig. 1 is that the explosion-proof keyboard of short message terminal under coal mine of the present invention is assemblied in the schematic diagram on the explosion-proof casing;
Fig. 2 is the schematic diagram of the separate housing of short message terminal under coal mine of the present invention;
Fig. 3 is the schematic diagram of the multiplexing shell of short message terminal under coal mine of the present invention;
Fig. 4 is the schematic diagram the during primary importance of keycap main body when not being pressed in a kind of execution mode of the explosion-proof keyboard group of short message terminal under coal mine of the present invention;
Fig. 5 is the schematic diagram the during second place of keycap main body when pressing in a kind of execution mode of the explosion-proof keyboard of short message terminal under coal mine of the present invention;
Fig. 6 is provided with keycap character, the schematic diagram when identification card is bar code on the explosion-proof keyboard of short message terminal under coal mine of the present invention;
Fig. 7 is provided with keycap character, the schematic diagram when identification card is radio-frequency card on the explosion-proof keyboard of short message terminal under coal mine of the present invention;
Fig. 8 is provided with keycap character, the schematic diagram when identification card is the infrared coding transmission cards on the explosion-proof keyboard of short message terminal under coal mine of the present invention;
Fig. 9 is the schematic diagram of the identification module variety of way of short message terminal under coal mine identification card variety of way of the present invention and correspondence;
Figure 10 is a short message terminal under coal mine of the present invention, at the electrical schematic diagram of one of execution mode of Fig. 4 execution mode key scanning circuit;
Figure 11 is a short message terminal under coal mine of the present invention, at the electrical schematic diagram of one of the execution mode of luminescent device in Fig. 4 execution mode key scanning circuit;
Figure 12 is a short message terminal under coal mine of the present invention, at the electrical schematic diagram of one of keyboard scan integrated circuit selection in Fig. 4 execution mode key scanning circuit;
Figure 13 is the schematic diagram of short message terminal under coal mine of the present invention when being connected in network;
Figure 14 is the schematic diagram of short message terminal under coal mine theory structure of the present invention.
Embodiment
Below in conjunction with embodiment shown in the drawings the present invention is further described in detail.
As Fig. 1～shown in Figure 14, manufacture and design a kind of short message terminal under coal mine, its structure comprises:
One explosion-proof keyboard group 20 in first, second execution mode, is fixed on the explosion-proof casing 60 by press box bolt 72 by press box 71.In other execution modes, can fix by the method that meets State Standard of the People's Republic of China GB 3836 " explosive gas atmosphere electric equipment " requirement.
As shown in figure 10, the lead-in wire of described explosion-proof keyboard group 20 inserts key scanning circuit 40.
As shown in figure 14, a network-driven module 110, its coffret 111 is industrial-controlled general line interfaces.
As shown in Figure 1, the message pick-up of an identity identification module 81 probe is installed under the light inlet window or plastic cement part of explosion-proof casing 60.
One display screen 21 is installed under the light inlet window of explosion-proof casing 60, shows short message and control prompting character.
As shown in figure 14, a Hanzi font library 150, storage Chinese character, symbol, English character.
The setting of Hanzi font library is in order to show the Chinese character short message at display screen.
One main control module 100 connects network-driven module 110, key scanning circuit 40, identification module 81, display screen 21, Hanzi font library 150.
As shown in Figure 2, in the first embodiment, described short message terminal under coal mine is installed on separate housing 10, and described terminal has unique station number.
As shown in Figure 3, in second execution mode, described short message terminal under coal mine is installed on multiplexing shell 11, inspect the watch window that window 91 is other checkout equipments in the same shell, label 92 is explanations of other checkout equipments in the same shell, connection jaws the 51,52, the 53rd, various cable inlets, set bolt 65 is connected explosion-proof casing 60 with casing 50, short message terminal under coal mine in the multiplexing shell 11 partly has independently unique station number, and other checkout equipments have other station numbers in the same shell.
Described explosion-proof keyboard group 20 be assembled on the explosion-proof casing 60 and casing 50 assemblings after, shell integral body and electric part meet State Standard of the People's Republic of China GB 3836 " explosive gas atmosphere electric equipment ", with meet the industry standard MT209-1990 of the People's Republic of China (PRC) " colliery is communicated by letter, detects, controlled with the electric and electronic product current techique and requires ", the requirement of MT210-1990 " colliery communication, detect, control is with electric and electronic product fundamental test method " and MT/T899-2000 " colliery information carrying means " standard.
As shown in Figure 9, described message pick-up probe comprises RFID wireless probe 814, radio-frequency card antenna 811, barcode scanner 813, infrared remote receiver 812.Wherein RFID wireless probe 814 is at active wireless identity tag card or passive long apart from reading card.Radio-frequency card antenna 811 is at the passive wireless identity tag card of short distance.
As Fig. 6～Fig. 8, correspondingly, each personnel of going into the well carries passive card, active card, is installed on the safety cap, in the lamp holder, also can exists by absolute version, is carried at body.
Bar code transparent area 851 provides path for barcode scanner 813.
Infrared light transmission district 831 provides path for infrared remote receiver 812.
The distance that described message pick-up probe reads identification card 80 card numbers should be finished in the distance of avoiding other people to disturb, for example less than 40cm.This size does not require very accurate, but size is big, causes that easily long distance is stuck in the holder when being not intended to swipe the card, and just makes short message terminal under coal mine misoperation continually.Some are good, certain common radio-frequency card so read the distance weak point, and for example the card of E5557 model reads distance about 10cm, just can guarantee to read reliably.
For the wireless rfid card 804 that long distance reads, can be by reducing to install RFID wireless probe 814 antenna sizes in the enclosure, modes such as additional mask reduce the Card Reader distance.
The personal security supervisory control system has all been installed in present most of colliery, and each employee has disposed ID card in the system.Short message terminal under coal mine of the present invention can user of service's safety monitoring system same ID card, so just realize one card for multiple uses, the convenient use.
Described coffret 111 comprises RS485 bus interface, CAN bus interface, WORLDFIP bus interface, foundation fieldbus interface, and the Industrial Ethernet interface.
Operable Industry Control fieldbus type is a lot, does not exemplify one by one at this, will consider during application that any bus interface the time considers essential safety in design, is fit to use in the subsurface environment of colliery.
Described short message terminal under coal mine is to use like this:
5., at first on short message terminal, swiped the card, identification module 81 reads the card number of identification card 80 by the user;
6., main control module 100 is according to card number, sends the inquiry request by network-driven module 110 to coffret 111, waits for that then network replys,
7., if having the new short message of this card number this moment in network, the short message that system is just new with all sends to this short message terminal; If this user's new short message not in the network, network just send one to this short message terminal and reply prompting accordingly;
8., after the user reads new short message or replys prompting, next the user to select be to desire the breath of sending short messages, transmission again with explosion-proof keyboard group 20 editors; Still select to withdraw from operation.
Step is 2. described when coffret 111 sends the inquiry request, comprises the station number, the user's card number that send short message terminal itself.
After the 1. described identification module 81 of step read the card number of identification card 80, main control module 100 retrieve stored districts 180 were shown that by display screen 21 the historical note of this card number writes down catalogue, and the user selects whether to read historical record according to prompting.
After the 4. described user of step read new short message, main control module 100 sent a return information by coffret 111 to the letter substation, and this return information comprises station number, user's card number, the time for reading of short message terminal itself.
In other execution mode, described main control module 100 can connect a personal information storehouse, comprises in the described personal information storehouse at least according to the pairing personnel's name of the card number of identification card, work position.
Described personal information storehouse regular update, described renewal comprise increase, the newly-increased personnel of deletion and the personnel's that leave the post information.
A kind of execution mode of button 30 as shown in Figure 4:
One lens section 32 is positioned at the top of light emitting devices, light receiving element.
One keycap assembly 33 is positioned at the place ahead of lens section 32, and described keycap assembly 33 comprises fixed part, bending part, keycap main body and light guide part.
Described bending part connecting key cap main body; Described keycap main body is arranged with the light guide part.
Described fixed part is fixed, and the keycap main body is in the primary importance that is not stressed, and the emergent ray of described smooth guide part refraction passes into others' hands and receiving outside the ray axis.
As shown in Figure 4, connecting portion is connected with the keycap main body on the guiding of light guide part, and the guiding bottom of light guide part is a contact-making surface in optimal design scheme, and the guiding middle part also is a contact-making surface.
Under the described keycap main body second light-reflecting portion is set, second light-reflecting portion is in the face of reflective axle, and described smooth guide part has mobile light-reflecting portion, and during in the second place that is pressed, the emergent ray of mobile light-reflecting portion refraction overlaps with reflective in the keycap main body.
Best, second light-reflecting portion and reception ray axis angle at 45, mobile light-reflecting portion and emergent light bobbin angle at 45.
As shown in Figure 5, described keycap main body is in the second place that is pressed, and the light guide part is in company with the displacement of keycap main body, and bottom and the end face of guiding middle part difference contact lens portion 32 and the end face of second light-reflecting portion lead.
At this moment, the emission light along the outgoing of emergent light bobbin of described light emitting devices is reflected by the light guide part, injects light receiving element along receiving ray axis.
The place ahead of described light receiving element can be provided with an astigmatic shielded-plate tube along receiving ray axis, the effect that the light shield pipe is set is can accurately distinguish emergent ray whether to fall into the reception ray axis, have only accurately to fall into the light that receives ray axis, just can be by the light shield pipe.
Described bending part itself has under elasticity or the keycap main body Flexible element is set; One end of described Flexible element withstands on the keycap main body, and when the keycap main body was not stressed, Flexible element eject key cap main body 15 made the keycap main body be positioned at primary importance.
Described Flexible element comprises spring, extension spring, shell fragment, elastic rubbery body, elastic mechanism.
Also has the operable explosion-proof keyboard group 20 of other forms.
Figure 10 is the support circuit of explosion-proof keyboard group 20 embodiment of Fig. 4, is a kind of form that light receiving element inserts key circuit 40, and the form that can realize is numerous, only lifts Figure 10 one example at this and is explained, and the present invention's feasibility technically is described.
What indicate " 312 " label among the figure is light receiving element of the present invention, and its collector electrode connects resistance R 22, connects keyboard integrated circuit ZLG7290 shown in Figure 12 again by R22, connects the DIG1 pin.
The emitter of light receiving element connects the pin SEGC of ZLG7290, and when the keycap main body of correspondence was not pressed, light receiving element did not have rayed, is in cut-off state, itself presented very big resistance, did not almost have electric current to flow through.ZLG7290 scans all DIG0～DIG7, SEGA～SEGH pin, does not all flow out electric current and inflow current, judges that do not have button to press this moment.
When the keycap main body of light receiving element correspondence is pressed, light receiving element is by rayed, be in conducting state, ZLG7290 scans all DIG0～DIG7, SEGA～SEGH pin, find that DIG1 has the electric current of outflow and SEGC that inflow current is arranged, judging has button to press this moment, ZLG7290 /INT pin output interrupt signal, key information is outputed to microprocessor by SDA, SCL, GND pin.
Light receiving element can be selected multiple light-sensitive element for use, photodiode, phototriode, Darlington photosensitive tube, field effect photosensitive tube all can, follow-up also can further the amplification inserted key circuit again.
Figure 11 is that coal information device of the present invention inserts power supply with light emitting devices in the button, makes the electrical schematic diagram of its work.This is a simple principle, and the operating current size of the resistance size decision light emitting devices of resistance R 1 is generally all in the milliampere level.
The model that light emitting devices can be selected for use is a lot, best, can select light emitting devices and light receiving element assembling device for use, optical wavelength matches like this, helps using.
Keyboard integrated circuit ZLG7290 shown in Figure 12 is not unique selecting for use, also has many keyboard integrated circuits to finish the work well, can realize the keyboard scan function with microprocessor yet.
As shown in Figure 7, more than one button 30 is formed explosion-proof keyboard group 20, in the preparation of the keycap top of button 30 0～9,26 English alphabet A～Z of numeral is arranged, and the certain operations symbol.The button of these symbol logos cooperates the prompting of display screen, carries out different operations.
As shown in figure 13, network 3 connects aboveground short message terminal 2, and aboveground short message terminal 2 generally is a commander office.Network 3 comprises employing industrial-controlled general line and Industrial Ethernet, at least one collection letter terminal 4 can be set in network 3, collection letter terminal 4 is data buffer zones of a magnanimity, the benefit that collection letter terminal 4 is set is more, the for example described retention time that on the collection letter terminal 4 of network 3, keeps a setting by aboveground short message terminal 2 new short messages, do not taken away by the target people yet when expiring, this short message will be return sends ground.
Though the Frame of CAN bus is very short, can be combined into packet with a plurality of Frames and sends.
For larger colliery, can consider that Industrial Ethernet combines with industrial-controlled general line.Because in the prior art, each Industrial Ethernet all has the fieldbus of coupling close with it, such as FF-HSE and the close coupling of FF-H1 (Fieldbus Foundation) foundation fieldbus; PROFINET and Profibus (Process Field bus) close coupling of fieldbus or the like.
Therefore network 3 can adopt fieldbus in the exploiting field, for example RS485 bus, CAN bus and Worldfip (World factory instrumentation protocol) bus, main line or the aboveground employing Industrial Ethernet that goes up.Can reduce investment like this, guarantee the data velocity of liquid assets again.In addition, the Industrial Ethernet PROFINET I/O product of Siemens Company's release can directly substitute fieldbus.
The specific embodiment of the present invention is more than above-mentioned various, the embodiment that the present invention exemplified not is the qualification to oneself, every content that does not break away from technical solution of the present invention,, all still belong in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (10)
1. a short message terminal under coal mine is characterized in that, the structure of described terminal comprises:
One explosion-proof keyboard group (20) is assemblied on the explosion-proof casing (60), and the lead-in wire of described explosion-proof keyboard group (20) inserts key scanning circuit (40);
One network-driven module (110), its coffret (111) is the industrial-controlled general line interface;
The message pick-up probe of one identity identification module (81) is installed under the light inlet window or plastic cement part of explosion-proof casing (60);
One display screen (21) is installed under the light inlet window of explosion-proof casing (60), shows short message and control prompting character;
One Hanzi font library (150), storage Chinese character, symbol, English character;
One main control module (100) connects network-driven module (110), key scanning circuit (40), identification module (81), display screen (21), Hanzi font library (150);
The card number that described main control module (100) reads according to identification module, send the inquiry request by network-driven module (110) to coffret (111), and wait for that network replys the new short message of this card number, or network is replied the prompting of the short message that this card number is not new;
Described explosion-proof keyboard group (20) is used for editor by the user and desires the breath of sending short messages after the user reads new short message or replys prompting, sends again; Or be used for withdrawing from operation.
2. short message terminal under coal mine according to claim 1 is characterized in that:
Described short message terminal under coal mine is installed on separate housing (10); After described explosion-proof keyboard group (20) was assembled on the explosion-proof casing (60), shell integral body met GB 3836 explosive gas atmosphere electric equipment standard-requireds, and described terminal has unique station number.
3. short message terminal under coal mine according to claim 1 is characterized in that:
Described short message terminal under coal mine is installed on multiplexing shell (11); After described explosion-proof keyboard group (20) was assembled on the explosion-proof casing (60), shell integral body met GB 3836 explosive gas atmosphere electric equipment standard-requireds, and the short message terminal under coal mine in the multiplexing shell (11) partly has independently unique station number.
4. short message terminal under coal mine according to claim 1 is characterized in that:
Described message pick-up probe comprises RFID wireless probe (814), radio-frequency card antenna (811), barcode scanner (813), infrared remote receiver (812).
5. short message terminal under coal mine according to claim 1 is characterized in that:
Described coffret (111) comprises RS485 bus interface, CAN bus interface, WORLDFIP bus interface, foundation fieldbus interface, and the Industrial Ethernet interface.
6. short message terminal under coal mine according to claim 1 is characterized in that:
Distance when described message pick-up probe reads identification card (80) card number is less than 40cm.
7. the using method of a short message terminal under coal mine, the structure based on the described short message terminal under coal mine of claim 1 is characterized in that:
Described method comprises step:
1., at first on the message pick-up of short message terminal probe, swiped the card, identification module (81) reads the card number of identification card (80) by the user;
2., then main control module (100) is according to card number, sends the inquiry request by network-driven module (110) to coffret (111), waits for that then network replys,
3., if having the new short message of this card number this moment in network, the short message that network is just new with all sends to this short message terminal; If this user's new short message not in the network, network just send one to this short message terminal and reply prompting accordingly;
4., after the user reads new short message or replys prompting, next the user to select be to desire the breath of sending short messages with explosion-proof keyboard group (20) editor, transmission again; Still select to withdraw from operation.
8. the using method of short message terminal under coal mine according to claim 7 is characterized in that:
Step is 2. described when coffret (111) sends the inquiry request, comprises the station number, the user's card number that send short message terminal itself.
9. the using method of short message terminal under coal mine according to claim 7 is characterized in that:
After the 1. described identification module of step (81) reads the card number of identification card (80), main control module (100) retrieve stored district (180), the historical note that is shown this card number by display screen (21) writes down catalogue, and the user selects whether to read historical record according to prompting.
10. the using method of short message terminal under coal mine according to claim 7 is characterized in that:
After the 4. described user of step read new short message, main control module (100) sent a return information by coffret (111) to the letter substation, and this return information comprises station number, user's card number, the time for reading of short message terminal itself.
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| CN2008100658006A CN101247560B (en) | 2008-03-07 | 2008-03-07 | Short message terminal under coal mine and its application method |
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| CN2008100658006A CN101247560B (en) | 2008-03-07 | 2008-03-07 | Short message terminal under coal mine and its application method |
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| CN101247560B true CN101247560B (en) | 2011-09-28 |
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| NL2002548C2 (en) * | 2009-02-20 | 2010-08-24 | Orga B V | System for controlling electrical equipment units. |
| CN104461125A (en) * | 2014-11-12 | 2015-03-25 | 宁夏嘉翔自控技术有限公司 | Cable marker welding method of explosion-proof touch screen formed by restructuring common touch screen |
| CN111287797B (en) * | 2020-04-09 | 2021-09-17 | 安徽恒源煤电股份有限公司 | Underground coal mine communication control device |
Citations (2)
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| CN1777105A (en) * | 2005-12-02 | 2006-05-24 | 济南蓝动激光技术有限公司 | Mine voice communication system based on computer network |
| CN1967597A (en) * | 2006-03-24 | 2007-05-23 | 于国朝 | A mining intelligent card image attendance machine |
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2008
- 2008-03-07 CN CN2008100658006A patent/CN101247560B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1777105A (en) * | 2005-12-02 | 2006-05-24 | 济南蓝动激光技术有限公司 | Mine voice communication system based on computer network |
| CN1967597A (en) * | 2006-03-24 | 2007-05-23 | 于国朝 | A mining intelligent card image attendance machine |
Non-Patent Citations (1)
| Title |
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| 相桂生.中小型矿井主扇和瓦斯无线远程监控系统的研究.《中国安全科学学报》.2003,第13卷(第5期),第24-25页. * |
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