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1 Technical scheme of Julai underground personnel positioning system
1.1 System overview
The downhole personnel and equipment positioning and tracking system developed by Shanghai Julai Radio Frequency Electronic Technology Co., Ltd. based on the third-generation RFID technology is a downhole positioning system that uses the most advanced BEST-RFID technology in the world. It can timely (no patrol, no delay) and accurately (no wrong codes, no missing cards) to reflect the dynamics of personnel and equipment in various areas of the underground to the surface computer system, so that the management personnel can grasp the status of underground personnel and equipment at any time. The distribution status and the movement trajectory of each miner to facilitate more reasonable scheduling management. When an accident occurs, the underground personnel can ask for help in the ground engine room through the positioning card they hold. The rescuers can also quickly understand the location of the relevant personnel based on the data and graphics provided by the Shanghai Julai underground personnel and equipment positioning system, and take timely measures. Corresponding rescue measures improve the efficiency of emergency rescue work.
The third generation of RFID technology—BEST RFID—also known as excellent RFID. It is from the first generation of RFID that cannot accurately identify personnel information—to the second generation of RFID which can only be accurately identified by a single read head, and then to the third generation of BEST RFID—excellent RFID can be networked, multi-directional, and multi-read Head, (two or more, a single subnet can reach hundreds, and the entire network can reach thousands). At the same time, it is an essential leap to accurately identify personnel positioning information.
The third generation of RFID technology—BEST RFID, also known as excellent RFID, uses 0.13um chip manufacturing technology, relies on the world’s top radio frequency electronic technology experts, and integrates the world’s most advanced antenna technology, optical communication technology, and industrial Ethernet transmission technology , Database processing technology, computer software technology, geographic information system technology, Internet technology, engineering structure technology, underground emergency rescue technology and other multi-disciplinary comprehensive subject research, comprehensively, complete, and thoroughly solved the problems encountered in the underground personnel positioning system The technical bottleneck problem that the first two generations of RFID could not break through.
Although the first two generations of RFID technology can solve single reader identification in some applications, when the system requires two or more readers to form a system network for identifying personnel information and positioning, there will be personnel information and positioning data delays of up to 10 The data delay of reading heads within 10 seconds and less than 10 can reach 30 seconds. With more than 10 reading heads, the data delay can be as high as three, five minutes or even ten minutes for incurable diseases. Also, data transmission is slower when there are multiple read heads. Due to the data round robin, the data of each read head can only be uploaded in batches, causing the positioning information of the underground personnel to go up and down and the positioning trajectory to go up and down. It can’t reflect the location information of underground personnel effectively in real time. The more prominent problem is that the number of read heads for the entire subsystem cannot exceed 30. If the number of read heads exceeds 30, the communication box will be added, which will cause the data delay to double, and the delay can reach five minutes or even ten minutes. It is possible to move a hundred meters, and the personnel location information of more than five minutes will make the personnel even more unable to determine their whereabouts. Such a system no longer has personnel positioning value at all. What’s more, the serious thing is that the previous two generations of systems have no directionality, or the directionality can only be between the two reading heads, single in and single out. Three, four, five, and six lanes and the directionality of the entire positioning system can not be judged.
The third-generation BEST RFID not only can perfectly achieve ultra-high-speed identification, ultra-long-distance identification, ultra-low power consumption, and ultra-large flow identification between a single reader and a card, but also compared to the previous two generations of RFID, BEST RFID truly realizes RFID technology Networked applications and high-speed real-time data transmission, multi-read heads (more than two, up to hundreds of single subnets) simultaneously and accurately identify the problem, and more importantly, identification data screening, upload no more rounds, Delay. Each reading head has directionality, which can effectively judge the directionality, and the downhole and uphole are triggered at the same time, and the upper computer judges within one second without delay.
The third-generation BEST RFID also solves the Achilles’ heel of the previous two generations of RFID technologies, which are short in sensing distance and poor in anti-collision capabilities. The collision transfer of multi-frequency bands and multi-channels eliminates the possibility of conflicts. Its various technical indicators are in the leading position in the industry among similar products, creating a new era of real ultra-long distance, real network, high-speed mobile conditions, ultra-low power transmission, and real-time transmission identification technology.
The third-generation BEST RFID was successfully developed by Shanghai Julai Radio Frequency Electronic Technology Co., Ltd., which integrated the world-class RFID technical experts, computer software, hardware, network experts, optical communication experts, and coal mine non-coal mine rescue and rescue search and rescue experts.
Shanghai Julai underground personnel and equipment positioning system is a comprehensive application system integrating underground personnel attendance, tracking and positioning, post-disaster first aid, and daily management. It is also the domestically most advanced technology, the most stable operation, and the most professionally designed underground positioning system. The realization of this scientific and technological achievement will bring new opportunities for the safety production and daily management of coal mine enterprises as well as emergency first aid.
1.2 Overall system design ideas
The underground personnel location tracking and attendance management system involves computer software, database, electronic circuit, explosion-proof intrinsically safe power supply, digital communication, wireless identification RFID technology, underground industrial Ethernet, underground construction, etc. Therefore, in addition to its functions, the stability, reliability, anti-interference ability, fault tolerance and abnormal protection are also fully considered when designing the scheme. The project plan determines to use the existing mature high-speed industrial Ethernet system as the main transmission platform, and develop corresponding underground personnel tracking and positioning base stations, personnel wireless encoding transmitters and other equipment to connect to the system, and use underground personnel tracking and positioning base stations and attendance management special software It exchanges background data with the main system with a standard dedicated database to realize the tracking and positioning and safety management of underground operators. The overall design of the system is mainly reflected in:
Realize the effective identification and monitoring of the entry and exit of coal mine operators, so that the management system fully reflects “humanization, informationization and high automation”, and realizes the goal of digital mines.
Provide coal mine managers with various management information such as personnel entry and exit restrictions, attendance operations, monitoring and control, etc. Once a safety accident occurs, the system can immediately detect the personnel and their numbers on the work surface within 10-30 meters of the accident site , To ensure the efficient operation of emergency rescue and safety rescue work.
The system design is safe, expandable, easy to maintain and easy to operate.
Easy networking, BS structure, easy to realize network monitoring of counties, cities, provinces and a wider area.
1.3 System design principle and basis
1.3.1 Principles of System Design
The underground personnel positioning management and search and rescue system is supported by the main computer of the ground monitoring center and the system software. Through the data transmission interface and the communication light/cable laid along the roadway, the wireless data collector installed in the underground is uninterrupted and real-time for data information Collection, the wireless data collector will automatically collect the information of the identification card within the effective recognition distance, and transmit the relevant data to the ground center station through the transmission network without interruption and instant. After the data information is analyzed and processed, the dynamic distribution of underground personnel (or moving targets such as locomotives) can be reflected in the main computer interface in real time, so as to realize the purpose of digital management of underground safety status on the well.
Following the principle of “unified card issuance, unified equipment, and unified management”, the identification card is regarded as an “entry permit” or “tunnel access permit”, and the “one person, one card” system is implemented according to the permitted personnel.
According to mine monitoring requirements, wireless data collectors are installed in underground tunnels, tunnels, working surfaces and other locations, and they are connected to each other as underground high-speed industrial Ethernet through cable/fiber data transmission interfaces to form a complete communication line.
After the coal mine production unit enters the relevant information of the staff, the staff in the underground mine will issue and equip the identification card.
The system database records the basic information of the person corresponding to the identification card, including basic information such as name, age, gender, team, type of work, position, photo, and validity period.
Workers entering the tunnel must carry identification cards with them, and the cardholders will be recognized by the system when they pass the location where the identification system is set up. The system will read the card number information, and transmit the road section, time and other information passed by the cardholder to the ground monitoring center through the system transmission network for data management. At the same time, a prompt message will appear on the large geographic information screen to show the passing personnel. ‘S name. If the detected wireless identification card number is invalid or enters a restricted channel, the system will automatically alarm, and the security monitoring center staff on duty receives the alarm signal and immediately executes the relevant safety work management procedures.
The production unit can authorize the management of the identification card according to the production plan. The scope of authorization includes: tunnels or work surfaces that the employee can enter. In order to prevent irrelevant and illegal persons from entering the tunnel or work surface, the system is equipped with a time management module for access to the tunnel or work surface of the card, as well as card failure and loss reporting.
Once a safety accident occurs in the tunnel, the monitoring center can know the basic situation of the trapped person in the first time. The rescue team uses a mobile remote identification device to easily detect the location of the person in distress within a range of 10-30 meters, which is convenient ( Carrying out safe and efficient rescue work) The safe and efficient operation of rescue work facilitates the development of accident rescue work.
The system can automatically generate report data on the statistics and management of attendance operations to improve management efficiency.
1.3.2 System design basis
(1) GA/T75 “Procedures and Requirements for Safety Protection Engineering”
(2) MT209-1990 “General Technical Requirements for Electrical and Electronic Products for Coal Mine Communication, Testing and Control”
(3) The State Administration of Work Safety “Draft of the Standard (Recommendation) for the Location Management System of Underground Personnel in Coal Mines”
1.4 System functions and features
1.4.1 System function:
20 outstanding functional characteristics, derived from the excellent performance of the third-generation BEST-RFID in the underground personnel positioning and tracking system, ensure that the Shanghai Julai underground personnel positioning and tracking system is compared with the previous two generation systems, which can be called an epoch-making perfection product.
1. Precise time positioning
The control flow and data flow of the entire system do not need to be patrolled. The data refresh of hundreds of read heads is calculated in milliseconds. Within the effective coverage of the positioning sensor (2-512) network, the upper computer software truly achieves “what you see is what you get”. Instantly read and upload personnel location information, without time delay, and truly achieve positioning time accurate to the second.
2. Precise spatial positioning:
Under the effective recognition distance interval of the reading heads, the card can be accurately positioned between the reading heads. When the reading heads are arranged in sequence, the distance between reading heads is the minimum positioning accuracy, and the distance between reading heads can be adjusted above 10-2000 meters.
3. Any reading head of the overall system can effectively identify the direction:
Each reader and card has direction identification information, and any reader in the whole system has the ability to discriminate the multi-directional movement of the card. At three, four, five, and six branch roadways, each branch has a single reader , Can accurately judge the direction, and reduce the installation cost exponentially.
4. Low voltage alarm for card label.
The card battery can be used for more than five years. After long-term use, when the battery is about to run out, it can automatically prompt to replace the card battery. This important function basically prevents the SUPER-RFID product from gradually showing a large number of damage after a period of use. Card (lack of power), and because the system itself does not have a self-check function, users have to repeatedly invest considerable manpower and equipment for attendance and card management, making the positioning system a virtual phenomenon. The battery can still be used normally for more than one month after BEST-RFID shows a low-voltage warning.
5. The system eliminates the inevitable garbled phenomenon of the second-generation RFID products, ensuring that data and card identification are truly foolproof:
The unique chip integration innovation technology of 0.13um plus CAN+ built-in protocol essentially surpasses the performance of the second-generation RFID technology. From the design structure and technical agreement, it is guaranteed that BEST-RFID products will not appear any garbled phenomenon.
6. No round robin, no delay: real standard CAN technology + underground industrial Ethernet platform, real-time dynamic display of underground personnel in a real sense:
The system has been customized to CAN+ industrial Ethernet structure from the chip design, no matter how many positioning sensors (2-512) there are, no system polling is needed, and the data is no longer delayed.
Query and display the number, distribution and identity of a certain place underground at any time.
Query the actual position and movement track of one or more personnel in the underground mine.
A series of information such as the arrival/departure time and total working time of relevant personnel at any location are recorded with practical significance (accurate to the second, not more than a few minutes), which can supervise and implement important inspection personnel (such as: gas detection) Personnel) Whether to conduct on-site inspections on time and to the point, or conduct various data detection and processing, and fundamentally eliminate related accidents caused by human factors.
7. Free choice of optical fiber and cable transmission methods:
According to the actual conditions of the underground mine and customer requirements, the CAN and TCP/IP interface protocols can be freely selected, and the built-in or under-construction, newly-built optical fiber underground Ethernet or cable direct laying methods can be selected.
8. Real-time, accurate, and abundant personnel’s ability to go down the well to check on work attendance:
It can count the personnel entering and exiting the well with accuracy to the millisecond level, realizing the attendance record of the personnel entering and exiting the well, creating and printing various information reports of the personnel entering and exiting the well (such as: logging time report, attendance monthly report, overtime report, absence report, etc.), It is convenient for management personnel to query and manage.
9. Reliable and effective emergency call for help:
Each positioning card comes with a specially designed emergency call device that is protected by the “Patent Law of the People’s Republic of China”-functional patent. When the underground personnel are in distress, the card holders can conveniently and effectively call for help to the ground engine room and search and rescue personnel. The monitoring computer room can promptly call for help and alarm, combined with effective means, to distinguish and dispose of underground distress and disaster information, and send out broadcast information to the underground when necessary. Search and rescue personnel can use hand-held detection equipment to find people in distress.
11. Optional underground community broadcast, immediate notification of specific or mine emergency situations:
After the monitoring room and management personnel have effectively judged the underground emergency situation, the cell broadcast option of the system can be used to broadcast a specific area or all of the underground. Effectively inform and evacuate underground personnel.
12. The function of forbidden entry for people without card in the mine:
The location and management of people without a card is a difficult point after implementing the location management of underground personnel. Shanghai Julai has designed a special sensor and device for banning people without a card, as an optional equipment for the system, to achieve a 100-secret management effect.
13. Large-capacity, super-superior recognition technology:
A single reader can recognize more than 8,000 cards at the same time, which is far beyond the 200-card limit of the second-generation RFID technology.
14. The card can be installed freely and conveniently, and is not restricted by the location of use:
According to customer needs, various installation methods are provided. Accurate and error-free identification of hat cards, badges, waist cards, mining caps, miner’s lamp batteries, to ensure free installation according to management needs, and the second-generation products can only be installed on the mining cap , Increase the transmission power at the waist and cause occupational damage to the human body.
15. Information sharing at multiple points:
The central station of the system and the network terminal can be networked in a local area network, so that all terminals on the network can share information at multiple points within the scope of use authority, so that multiple mine departments and leaders can share monitoring information, system comprehensive analysis information, and query information at different locations at the same time. Class data report.
16. Rich map functions:
It has functions such as zooming in, zooming out, moving, ruler distance measurement, field of view control, center movement, soil layer control, map printing, etc., and supports multiple graphic formats. Both mouse and keyboard can be operated, and real-time multitasking is fully supported.
17. Forbidden zone or equipment failure alarm function:
For the designated restricted area, if an unauthorized person enters, a real-time alarm will sound, and the number and identity of the person entering the restricted area will be displayed. The system also has a self-check function. When part of the system equipment fails, the upper computer software can respond in time, and initially determine the cause of the failure, and can output and print related information reports.
18. Post-disaster first aid information:
In the event of various accidents, the upper computer can immediately display the number of personnel, personnel information, personnel location and other information at the accident site. Combined with the mine map, it can enable disaster relief personnel to quickly judge and determine the accident emergency plan, which greatly improves the efficiency of rescue and rescue. .
19. Reserve power:
The tunnel wall-mounted design of the system products ensures that the system can operate continuously in harsh environments and provides a longer-term power supply after a power failure. It uses multiple sets of backup batteries to provide up to 2-4 hours of power failure protection.
20. Base station emergency function:
When the underground personnel tracking and positioning base station loses contact with the ground center station, the base station can still work independently and automatically store personnel monitoring data.
1.4.2 Performance characteristics
1. Ultra-low power consumption, ultra-high sensitivity performance:
The 0.13um chip manufacturing process has created excellent BEST-RFID performance.
The true ultra-low power consumption is less than one-tenth of that of the second-generation RFID products. Under the same transmitter power conditions, the effective sensing distance is more than double that of the second-generation RFID products.
The real ultra-high sensitivity, the same -10db, the effective recognition distance is more than double that of the second-generation RFID.
The unique ultra-small high-performance antenna design can meet the needs of any venue and space application.
2. Powerful system processing capability:
Use GW algorithm to optimize the data processing capacity of the system;
High degree of automation, automatic monitoring, statistics, and analysis of information, the whole process does not require human intervention;
Geographic information display and query system based on GIS technology;
Complete data analysis capabilities;
The communication distance is long, up to more than 40 kilometers.
3. Excellent recognition performance:
High recognition reliability, 100% front-end recognition rate;
Long recognition distance (convenient and adjustable recognition distance, up to 1-180 meters or more);
Very high anti-collision performance (each detection point can recognize up to 8000 cards at the same time);
High recognition stability (bit error rate is less than 10-9th power, reaching 1/100 million);
Fast recognition speed (up to 200 km/h recognition speed).
4. On-site advantages:
The complete system is designed with intrinsically safe structure and ABS antistatic shell.
Thoroughly designed with moisture-proof structure, it can work stably for a long time even in the harshest underground environment.
Environmental adaptability: high anti-interference, no special requirements for underground interference sources and perimeter environment;
Installation convenience: sensor integrated structure design, no need for external antenna or ground sense;
Operational reliability: The internal circuit is highly integrated, and the device failure rate is minimized.
The reader and card have an automatic self-checking and resetting structure, which can run for many years without false or missing reports.
5. Electrical characteristics:
Ultra-low power consumption, the wireless tag can work continuously for 5 years without changing the battery;
Convenience and safety, the label does not require an external miner’s lamp power supply, does not need to be charged, and does not need to replace the battery;
No radiation, no impact on human body and environment, safer and healthier.
All equipment is suitable for underground use, with functions such as waterproof, shockproof, anti-corrosion, moisture-proof, flame-retardant and so on.
Normal working environment conditions: temperature -40℃-85℃, relative humidity 40%-70%, atmospheric pressure 80kpa-106kpa
Anti-electromagnetic interference: 10V/m 0.1～1000MHz AM electromagnetic wave
1.5 System hardware and software
1.5.1 System hardware characteristics
1. Super integrated, full-duplex wireless transmission:
The 0.13um process creates ultra-low power consumption, ultra-high sensitivity, ultra-long-distance transmission, ultra-high speed identification, ultra-large easy identification, and ultra-low error rate. At the same time, it also easily realizes the high speed and high bandwidth of wireless transmission, the bandwidth reaches 4M, and the voice and image transmission can be easily realized in the full-duplex state.
2. Industrial control frequency band
Due to the use of wireless transmission media, wireless sensor networks overcome many of the shortcomings of traditional wired networks to transmit information. Under some physical obstacles and special environments, wired networks are impossible to achieve. On the other hand, compared with traditional public network wireless communication, 2.4G industrial control frequency band wireless communication does not require the approval of the Radio Regulatory Commission and does not need to pay spectrum occupation fees.
3. Ultra-low power consumption
The card identification device technically adopts a reasonable sleep mode, has the characteristics of low power consumption for sending and receiving information, etc., ensuring that it can continue to work for about 5 years with battery support. At the same time, the low-power design of the overall structure not only ensures the effective operation of the equipment, but also reduces the complexity and cost of application implementation.
4. Small size of equipment
The basic unit of a wireless sensor network is a coin-sized intelligent computing sensor device. The integration and product quality of modern integrated circuit technology make the volume of Shanghai Julai wireless sensor equipment continue to be smaller, but its functions are becoming more and more powerful. The small size not only makes the application in special environments possible, but also greatly reduces the requirements and costs of installation and maintenance.
5. Large network capacity
A sensor network can accommodate up to 65,000 micro smart sensor devices and a large number of access points. The large capacity guarantees the powerful data collection capability of the network. At the same time, the high redundancy of the network ensures that the entire network can still operate normally even when individual nodes stop working.
6. Precise and reliable
The accuracy, reliability, and stability of wireless sensor networks are more than a hundred times that of traditional methods. The core technology of Shanghai Julai’s wireless sensor system currently uses a unique verification redundancy error correction algorithm, combined with distributed computing technology, neural network technology, and network information fusion technology to achieve network self-awakening, self-fault tolerance, self-healing, and No errors, no garbled codes.
7. Low operating and maintenance costs
Based on the characteristics of the above wireless sensor network, it can be seen that the labor cost required to build the network is very low. Any authorized miniature smart sensor device can automatically join the network to work as long as it is placed within the wireless signal coverage of the network, without any installation configuration. The high degree of intelligence minimizes the manpower and time required for network maintenance, and the low price of the network node itself makes the maintenance cost of the Shanghai Julai wireless sensor network extremely low.
8. Technical features:
l Multiple signal acquisition;
l Very low current consumption;
l 4Mbps 2.4GHZ IEEE802.15.4 compatible radio frequency transceiver;
l <10us fast activation/sleep state transition; l Hardware layer encryption and identity verification security features; l Digital signal strength (RSSI) and wireless connection quality (LQI) support. 9. Fast transmission and high rate The application of high-speed optical fiber industrial Ethernet has increased the transmission rate of the entire system from a few hundred bytes to 100M, realizing a qualitative leap in transmission rate, which can realize multi-point concurrent query, that is, multiple collection points upload data at the same time. The acquisition time is greatly shortened, thereby greatly improving the real-time performance (multi-point concurrency in the true sense, unique from the chip design.) Instead of the second-generation RFID relying on various conversion cards and converters, the 232 Or 485 can be converted to CAN or TCP/IP, which can only change the protocol of trunk transmission to CAN or TCP/IP, but the output of each single sensor still retains the essential characteristics of 485 rounds, and the system network features simply do not have it. System control and data signals are also realized by round robin. 10. Mobile dynamic collection The advanced wireless sensor network technology is connected with the required sensors to realize the collection of mobile dynamics, such as gas, mine pressure, mine temperature and other environmental parameters can realize the mobile dynamic collection. 11. High reliability The application of advanced own technology has greatly improved the reliability of products and the ability of product identification. Such as the proprietary time stamp technology, that is, adding the collection time information on the basis of each received information, making the entire system more reliable. 12. Multifunctional It has realized nine important safety management functions such as real-time tracking and positioning of underground personnel, real-time tracking and positioning of locomotives, accurate attendance, historical inquiry, emergency call for help, community broadcast, no card entry, low voltage and restricted area alarm, and assistance in post-disaster search and rescue. 13. Openness The whole system has a wealth of software and hardware interfaces, which has great openness, and can be adjusted accordingly according to the needs of users. 14. High capacity The underground personnel management and search and rescue system can accommodate 1,000 data collectors underground, and each data collector can collect more than 8,000 identification card information at the same time. The entire system can accommodate hundreds of millions of identification cards, which is sufficient to meet the needs of existing large and medium-sized coal mines. . 1.5.2 System software interface 620)this.style.width=620;” border=0>
(Picture 1)
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( Figure II)
1.6 Configuration requirements, system diagrams and implementation steps
1.6.1 Operational equipment configuration requirements
Ground Central Station
The host computer of the ground center station adopts an industrial computer.
CPU: Use a CPU equivalent to Intel’s Pentium IV or above;
Operating system: operating system above Windows2000;
Memory: above 512M;
Graphics card: Compatible with Windows system, containing more than 16MB of display memory, with a resolution of more than 1280*800;
Hard disk: above 40G.
1.6.2 System Diagram
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Figure 1: System diagram
1.6.3 Implementation steps
According to the needs of the mine, conduct mine map research, field inspection, and determine with the mine supervisor the basic requirements such as the number of wireless data collectors to be installed and the corresponding installation location.
Determine the backbone network structure, the number of corresponding data transmission interfaces, and the installation location.
Laying physical links and optical cables, cables, etc., if you have an optical cable, you can use the remaining core number of the optical cable to build. The cables of shafts or inclined shafts shall be armored reinforced optical cables or cables, and shall be fixedly laid on the wall of the shaft.
device installation
Data transmission interface installation
The data transmission interface is fixed on the side wall of the tunnel by expansion bolts. See the data transmission interface user manual.
Wireless data collector
The wireless data collector can be fixedly installed on one side wall of the underground tunnel through expansion screws or steel nails. See the user manual of the wireless data collector.
Identification card issuance
system debugging
2 Typical applications and working modes
The underground personnel management and search and rescue system is a system with great flexibility. It can be constructed in different configurations and set into different working modes according to the needs of users, so as to meet the requirements of users of different sizes.
For different mines, although the underground conditions are very different, according to the actual needs of the mines and our experience, we classify mines according to the output: large (extra-large) mines (annual output of more than 2 million tons), medium-sized mines (annual output) More than 500,000 tons), small mines (with an annual output of less than 500,000 tons), and build according to different mine needs and typical applications, so as to better serve the mines.
2.1 Option One
Actual mine
There are many mining areas, long tunnels, huge range and long transmission distance
High degree of mechanization, high degree of modernization
Most of the fiber has been laid
High requirements for real-time and reliability,
System design
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plan description
Use optical fiber transmission interface to build underground high-speed industrial Ethernet in the form of optical fiber self-healing ring network.
Set up optical fiber transmission interface between every 4-5Km, such as set up at every work surface and lane entrance.
The recommended distance between wireless data collectors is 200-500 meters to form a downhole dynamic detection network.
2.2 Option Two
Actual mine
There are many mining surfaces, long tunnels, large areas, and long transmission distances
High degree of mechanization, numerous personnel
Some have laid fiber
System design
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plan description
Use optical fiber transmission interface to build underground high-speed industrial Ethernet in the form of optical fiber network.
An optical fiber transmission interface is set up between every 4-5Km, and set up at every work surface and lane entrance.
The recommended distance between wireless data collectors is 500-1000 meters to form a downhole dynamic detection network.
2.3 Option Three
The actual mining area of the mine is small, the tunnel is short, the range is small, and the transmission distance is relatively short
Low degree of mechanization, average quality of personnel
System design
plan description
Use a data communication box to connect with the equipment on the well.
The wireless data collector is connected in parallel with the communication cable to form a dynamic detection network underground.
Cost is lower than fiber optic system
3 Technology comparison
3.1 Comparison with other personnel management systems
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3.2 Comparison with other wireless data communication methods
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About Julai
Shanghai Julai RFID electron technology Co. Ltd. (Shanghai Julai RFID electron technology Co. Ltd.) is located in ——Shanghai. Pudong. Zhangjiang “National Radio Frequency Identification Industrialization (Shanghai) Base”. A high-tech company dedicated to the strategic research of the best international best radio frequency identification (BEST RFID) technology networked and systematic new product application. As a key enterprise of the National Radio Frequency Identification Industrialization (Shanghai) Base, it is in a comprehensive and leading overall environment in the RFID chip design, manufacturing, testing and RFID application system development of the Shanghai National Radio Frequency Industrial Park, relying on the park’s RFID industry, talents and market , Supporting good conditions in various aspects such as international cooperation, and jointly participated in the work of the first RFID national-level software and hardware joint laboratory and demonstration center. After several generations of years of experience and system product accumulation, the company has a first-class software and hardware team that can complete the real ultra-long distance, real networking, high-speed mobile conditions, ultra-low power transmission, and real real-time transmission. R&D and production of identification technology products. Including: industrial technology research, chip design, testing, RFID tag integration, production, RFID reader integration, production, optoelectronic equipment manufacturing, software development, RFID system integration, product testing and information consulting services, etc., forming an international RFID micro Advantages in the field of electronic technology and industrialization. Lay the foundation for Shanghai Julai Radio Frequency Electronic Technology Co., Ltd. to become an international BEST-RFID (Excellent RFID) leader.
The company has participated in the research and implementation of a number of major RFID application projects. We believe that the emergence of BEST-RFID technology will provide the best and most outstanding system technology solutions for real ultra-long-distance signal recognition and real-time data transmission applications. .
As the current leader in technology and productization in the domestic RFID field, it has successfully attracted the entry of the internationally renowned venture capital institution “ISB Technology Venture Investment III (LP)”, and is currently the number one in the domestic RFID industry. An industry company that is truly invested by international ventures.
“Being excellent beyond excellence; of course the best because of excellence”. BEST-RFID—Excellent RFID technology, provided by Shanghai Julai Radio Frequency Electronic Technology Co., Ltd.
Company staff
85% of the company’s employees have a university degree or above, including 3 professors, 5 doctors, 10 masters, and 2 MBAs. There are also 10 technical consultants. The number of doctoral and master students who work in zero-time sex is uncertain. A scientific and technological team with strong R&D and implementation capabilities has been formed.
Simultaneous development of system products and project implementation mechanisms
Every user expects a mature, reliable, stable, and worry-free system stereotyped product. We know that only by providing real and reliable application-level systematic products for all levels of agency dealers and end customers can all links in the industry chain be successful. Therefore: What we provide to industry users are worry-free products that are standardized, systematized, and comply with the most stringent index requirements of national standards and industry standards (draft).
For non-standard or non-standard (draft) industry project development and plans, regardless of the size of the project, the company will designate a backbone with relevant experience as the project leader, and the project leader must lead the development, and be able to plan and grasp comprehensively Implementation of the project. For complex or large projects, personnel with equivalent experience must also be designated as project supervisors.
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Leaders of the State Security Administration conducted a radio frequency electronic personnel location detection and attendance system for Shanghai Julai
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