RFID Mine Underground Personnel Tracking and Positioning and Attendance Management Program
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1. System overview
Due to the peculiarities of mine production, natural disasters such as water, fire, gas, coal dust, roof and other natural disasters threaten the lives of mine workers at all times, and major mine disasters and casualties may occur at any time. At present, it is generally difficult to manage personnel entering the mine underground, and it is difficult to grasp the dynamic distribution and operation of underground personnel in a timely manner. Once an accident occurs, there is a lack of reliable information for the rescue of underground personnel, and the efficiency of emergency rescue and safety rescue is low. Therefore, the mining industry urgently needs a tracking and positioning management system for underground personnel to grasp the location and activity trajectory of each person in the underground in real time, which will have a positive effect on the safety of mine production and reduce casualties to a certain extent. At the same time, the uploaded location information can also be used as staff attendance records. When we analyzed some major accidents in mines, we found that:
(1) The information communication between the ground and underground personnel is not timely;
(2) It is difficult for surface personnel to dynamically grasp the distribution and operation of underground personnel in time, and it is difficult to accurately locate personnel;
(3) Once a mine accident occurs, the efficiency of emergency rescue and safety rescue is low, and the search and rescue effect is poor.
(4) Inability to accurately grasp the presence of safety supervisory personnel.
The underground personnel tracking and positioning management and attendance management system can realize all-round safe production management of underground personnel. This system is supported by the main computer of the mine ground monitoring center and the software database through the transmission interface and the wired transmission system laid by the roadway. The digital signal transmitted by the personnel information transceiver card is processed by software, and the underground personnel (including moving targets such as locomotives) are dynamically distributed on the electronic map of the underground monitoring center, so that the management personnel can dynamically grasp the distribution status of the underground personnel, especially in the In the event of an accident, the location of the trapped person can be clearly known, which is convenient for quick rescue. The system can realize two-way alarms for downhole personnel, and the uphole command center can also make roll calls or broadcast calls to downhole personnel to achieve two-way communication.
The underground mine personnel positioning attendance and management system is based on the integration of the existing more advanced mine monitoring facilities, tracking, positioning, attendance and two-way communication for underground personnel, so as to realize the safety production management function of the underground personnel. This system is supported by the main computer of the mine ground monitoring center under the support of server software, through the transmission interface and the wired transmission system of the roadway laying, regularly conducts data inspection and signal collection on the underground communication base station, and after the software data processing, the underground personnel ( The dynamic distribution (including locomotives and other moving targets) can be reflected in real-time in the monitoring center of the well, so as to achieve the purpose of real-time monitoring and two-way communication management of the personnel in the well. The underground personnel positioning system can reflect the personnel situation to the underground roadway map through the electronic map.
2. System functions and features
“Accurate time positioning, precise spatial positioning” is the purpose of this system design. The system provides precise positioning for the time of each person who goes down the well, as well as a certain point in time and a certain time period in a certain location. The system provides multiple query functions.
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 with the system, and through the self-developed underground personnel tracking and positioning management and attendance The special management software exchanges background data with the standard special database of the main system to realize the tracking, positioning and safety management of underground operators.
(1) Network function
Through convenient and flexible user management functions and various authority settings, users can view and operate information on any computer in the local area network.
1. Network monitoring can be carried out in the mine, group, and bureau, allowing mine leaders to intuitively understand the dynamic information of various underground personnel in their offices.
2. The management authority is set, and only professional managers can perform operations such as adding, deleting, and modifying the management data.
(2) Equipment function
1. Realize the two-way communication (call and paging function) between the well above and below the well: divided into ordinary paging and emergency paging. With the paging delay function, if the current paging person is not within the signal range of the base station, the paging will be carried out within the signal range of the person arriving at the base station to ensure the effectiveness of paging. Whether the paged person responds to the call signal, the system will prompt and save the record for inquiries.
Downhole personnel can give an emergency alarm (including alarm confirmation function) to the underground to provide information for emergency rescue. Inoue’s roll call and broadcast paging to underground personnel, roll call includes ordinary calls and emergency calls.
Broadcast paging: paging all personnel in a certain base station or underground, and activate the sound and light alarm configured by the base station, which is used for emergency handling and special management functions. The system automatically saves records for inquiries.
2. The maximum moving speed of the dynamic target can be monitored at 15 m/s.
3. The maximum number of base stations that the entire system can accommodate is not less than 64, and the number of personnel information transceiver cards that each base station can receive at the same time is greater than 100.
4. Wireless communication distance between underground base station and personnel information card
Open ground: up to 160m
Underground: up to 80m
5. Positioning function: personnel positioning: quickly confirm the current and historical distribution of underground personnel through functions such as real-time distribution, historical distribution, trajectory playback, and personnel tracking. If the tracked person is within the detection range, its current location will be located by its card number. If the person being detected is not within the detection range, the system will automatically locate its last detected location.
(3) Management function
1. Distribution management of underground personnel
Real-time distribution: It can display the real-time dynamic distribution of the current underground personnel in the roadway and the number of personnel at all times.
Real-time tracking: It can track and monitor the location of underground personnel in real time. Intuitively reflect the distribution location of specific personnel underground.
Historical distribution: It can display the distribution location of underground personnel at a certain time in the past.
Track playback: It can display the movement process of any person in a certain historical period through animation.
2. Restricted area management function
The restricted area can be set up, and the audible and visual alarms are given to persons who enter the restricted area in violation of regulations. The management department of the well also alarms, records and evaluates at the same time. Divided into single-station restricted area management and regional restricted area management. You can set a certain type of work or a certain type of card number personnel to be prohibited from entering a set forbidden area, or you can set a specific person to prohibit entering the set forbidden area. In the single-station restricted area management, if there is a setting that does not allow personnel to enter the restricted area base station signal range, an alarm will be given to the entering personnel; the system saves records for inquiries. In the area restricted area management, the alarm can be automatically turned on and off according to the number of people entering and leaving the area. It is mainly suitable for the safety management of the lanes where vehicles are not pedestrians and the places where entry is prohibited. It can also be used to realize the supervision of important areas.
3. Statistics function of mine car operation management: It can realize the entry and exit management, operation statistics, and dynamic tracking of vehicles according to the needs.
4. Attendance and reports: It can assess the attendance of employees and generate attendance reports. It can perform statistical summary of various data and generate various reports required for mine management. It can generate the attendance information report of underground personnel with any date range and any personnel attributes (work type, card number, position, etc.), and can be flexibly customized according to the needs of the mine’s internal management. Can generate daily, monthly, quarterly, annual and other reports. The generated report can be printed or saved as an electronic document.
5. Emergency management function: Once various accidents occur, it can immediately find out the distribution and name of the underground personnel, and the specific location of the personnel in distress. It can also collect real-time data from uninterrupted base stations to improve rescue efficiency and rescue effectiveness.
6. Alarm function: The system has perfect monitoring and identification capabilities, can dynamically alarm a variety of pre-set prohibited behaviors, and save records.
7. Two-way call function: The system can call the underground staff individually and collectively according to needs (especially in emergency situations); the underground personnel can also call the ground host through the RFID card that they carry with them. (Note that this function refers to a handheld positioning chip. If it is placed in a miner’s lamp, it is not easy to implement if there is no external switch in the miner’s lamp)
8. Overtime alarm: downhole personnel working time overtime alarm, can be classified or individually set the upper limit of the downhole staff working time, beyond the set working time, the system will automatically send an alarm signal to himself, and the system will also pop up a reminder Dialog box, and save the record for query.
9. Overcrowded alarm: Real-time monitoring of the number of downhole workers, the system automatically monitors whether the current number of downholes meets the set number of downholes, if it exceeds the preset number of downholes, the system will give an alarm.
10. Ranging function: According to needs, the system can automatically measure the distance between any two points. This distance is the actual distance of the mine.
(4) System features
Design the geography information topographic map of the underground tunnel, which can enlarge and query various materials and information around the tunnel, such as fire and rescue, production equipment distribution information, tunnel environment information, and personnel distribution information. Install monitoring equipment in the main tunnels as needed, and store actual maps of the tunnel environment photographed in advance on the topographic map to provide management personnel with information inquiries.
If a safety accident occurs, the query system can know the number of people in the tunnel, the location of the entrance and exit, the location of the accident, the location of the remote equipment and other information to ensure the efficient operation of rescue and disaster relief. The characteristics of the system are mainly reflected in the following aspects:
1. Highly automated. The system can automatically detect the time and location information of the underground tunnel personnel passing the monitoring point, and automatically realize the attendance, statistics and monitoring management of the personnel.
2. Advanced communication system. The wireless information collection equipment installed in the various channels of the mine underground transmits the collected information to the underground dedicated processing and transmission substation in real time, and transmits the data passed by the relevant personnel to the network server on the ground in real time through the underground field bus. The whole process does not require human intervention. .
3. Complete data statistics and information query software. The system software has a dedicated database management system, including information collection and statistical analysis system for workers passing through tunnels, statistical and management analysis system for attendance operations, display and printing of various statistical reports, and provide a full range of queries and management for senior management Serve.
4. The system is designed for safety, stability and reliability. The system products adopt a tunnel wall-mounted design to ensure that the system can continue to operate normally in harsh environments and provide power supply for 2 hours after a power failure.
5. Complete alarm function for abnormal conditions. The system can automatically identify illegal entry, including illegal entry without a card, invalid card, invalid card, and blacklist card entry.
6. Flexible monitoring range. The distance and number of communication base stations can be determined according to the actual situation of the mine, technical requirements, and the scope and area of key monitoring.
7. A variety of high-tech integration. This system integrates wireless data transmission, CAN bus wired transmission, microwave communication, microcomputer technology, online programming and multi-level software technology. In microcomputer technology, a high degree of functional integration is adopted, so that the system has multiple functions such as analog-to-digital conversion, input recognition, filtering, storage, inspection, transmission, and online writing. More importantly, it can carry out two-way paging between the well and the well, the paging of a certain person on the well and the well, and the downhole personnel to give an emergency alarm to the well.If the mine leader needs to call an employee in the mine urgently, he can click the software two-way communication button, a menu will appear, enter the personnel information receiving and dispatching card number, send a message after confirmation, the employee identification card will send a signal, and the employee can communicate with the ground through the underground phone after receiving the information connect
8. Less investment and greater return. According to the current situation of the mine, the relevant equipment is added and modified, so that managers at all levels have management methods such as query, statistics, and control, and realize remote information management. Compared with similar equipment at home and abroad, this equipment has low cost, long transmission distance, high integration, and can save investment by more than 50%.
9. Multi-function: Realize the real-time monitoring and positioning of underground personnel, track playback, paging and alarm from underground to underground, alarm from underground to underground, attendance, overtime, overcrowding and restricted area management and many other management functions.
10. Safety: All equipment used in this system are products that comply with national safety standards, explosion-proof, flame-retardant, and anti-interference.
11. Anti-strong voltage and high current: This system adopts multiple lightning-forcing measures, and the lightning arrester adopts the products of France Ocean Electric. At the same time, special circuit preventive measures are adopted in each base station and intrinsically safe power supply.
12. High capacity: A central station host can accommodate 64 communication base stations, up to 6,400 information cards; each station can monitor more than 100 information cards at the same time, meeting the needs of large and medium-sized mines. The low voltage, low labor consumption and intrinsic safety of the whole system ensure the safety of underground mine use.
13. Automatic detection: The system automatically detects the operating status of the base station, facilitating timely maintenance of failures.
14. Flexible monitoring range: The distance between base stations can be determined according to the actual situation of the mine, technical requirements, and the scope and area of key monitoring.
15. A variety of high-tech integration: this system integrates wireless data transmission, CAN bus wired transmission, microwave communication, microcomputer technology, online programming and multi-level software technology. In the microcomputer technology, a high degree of functional integration is adopted, so that the system has multiple functions such as analog-to-digital conversion, input recognition, filtering, storage, inspection, transmission, and online writing. The paging of the well and a certain downhole personnel and the downhole personnel made an emergency call to the well.
16. The system interface is reasonable: the system interface is based on the theme of simple, beautiful and easy to operate, and complex functions can be realized with simple settings.
Three, system design principles
1. Realize the effective identification, monitoring and control of the entry and exit of underground mine operators, so that the management system fully reflects “humanization, informationization and high automation”, and realizes the goal of digital mines.
2. Provide mine management personnel with various management information such as personnel entry and exit restrictions, attendance operations, monitoring and monitoring. Once a mine safety accident occurs, the system can immediately know the staff and their numbers on the operation surface to ensure emergency relief and safety rescue Wait for the efficient operation of search and rescue work.
3. The system design is safe, expandable, easy to maintain and easy to operate.
4. Easy network connection, BS structure, can easily realize network monitoring in counties, cities, provinces and a wider area.
5. Following the principle of “unified card issuance, unified equipment, and unified management”, the identification card is regarded as an “entry permit” or a “tunnel access permit”, and “one person, one card” is implemented according to the permitted personnel. One card number corresponds to one person, strictly regulates management, and eliminates all potential hidden dangers of accidents. More convenient to manage.
4. System composition and working principle
1. System composition
Downhole personnel tracking and positioning management and attendance management system. The equipment on the well mainly includes: central station host, software database, transmission interface, etc.; downhole equipment mainly includes: communication base station, sound and light alarm, explosion-proof power supply, information transceiver card and other components.
The transmission interface and each communication base station are equipped with an intrinsically safe power supply, and all power supplies do not share the same ground. (According to Chinese standards, each base station is required to be equipped with an explosion-proof power supply, which converts the mine’s AC127V power to DC12V to supply power to the base station. If the customer does not require this, the base station can directly take electricity from the underground power supply, but this explosion-proof power supply is not required. Sound The light alarm means that some horns and warning lights can be installed underground to give an alarm, but the current mine basically cancels this function.
2. Working principle:
The underground personnel location tracking management and attendance management system is supported by the main computer of the ground monitoring center under the support of the system software, through the data transmission interface and the communication light/cable laid along the roadway, the wireless data collector is installed in the underground without interruption and in 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.
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 mine production unit enters the relevant information of the staff, the staff in the downhole 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, through the system transmission network, the staff who enters the tunnel through the section and time of the cardholder must carry the identification card with them, and the cardholder will be recognized by the system when the cardholder passes through 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 long-distance identification device to facilitate the detection of the location of the person in distress within a range of 80 meters, which is convenient for safety Efficient ambulance and rescue work) The safe and efficient operation of ambulance work facilitates the development of accident rescue work.
After going down the well, turn on the employee identification card switch, and then start to wirelessly transmit its own ID number to the receiving station. After the receiving station receives the above signal, it is stored in its own CPU. When the central station is inspected, it will be transmitted through the transmission system and the transmission interface. To the central station database, the central station discriminates, analyzes, and processes the data in the database to realize various management functions.
The system can automatically generate report data on the statistics and management of attendance operations to improve management efficiency.
Five, the main technical indicators of the system
1. System capacity
A central station host can accommodate 64 communication base stations, which can accommodate more than 6000 employee electronic identification cards; each communication base station simultaneously monitors 100 employee electronic identification cards.
2. Central station host
The host of the ground central station adopts mid-to-high-end servers.
CPU: Use a CPU equivalent to Intel’s Pentium IV or above;
Operating system: operating system above Windows2000/WindowsXP;
Application software: underground personnel location tracking and attendance management software developed with high-level language;
Memory: 512M; Hard disk: 80G;
3. Communication base station:
Electrical performance:
Working voltage: DC12V;
Working current: ≤380mA;
Capacity: Each base station can accommodate 100 personnel information transceiver card information;
Transmission rate: 4800bps;
4. Transmission interface
Working voltage: DC5V (±10%); Working current: ≤100mA;
Communication rate: 4800bps; transmission distance: ≥10Km;
5. Transmission error rate: ≤10-6
6. Transmission system:
Copper core twisted pair transmission, model PUYVP, cross-sectional area 1.5 square millimeters (DC resistance of the wire is not more than 12.5Ω/km, pair working capacitance is not more than 0.06μF/km, inductance is not more than 0.8mH/km), safety signs;
Shaft cable: armored shield 1×4×1.38;
Sound and light alarm: power supply voltage: DC12-15V;
Working current: less than 50mA; explosion-proof mark: Exib I;
Explosion-proof power supply: The non-intrinsically safe end of the transmission interface is powered by a normal AC/DC module output DC 5V stabilized power supply; the intrinsically safe end of the transmission interface is powered by a CSTI-I type explosion-proof power supply component that outputs DC 5V, which inputs AC220V and outputs intrinsic safety parameters 5V/1.5A;
The base station is powered by a KDW29 type explosion-proof and intrinsically safe power supply with input AC127V and output intrinsic safety parameters of 12V/1.1A. Voltage fluctuation range: -25―+10%;
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