New type mine personnel tracking and location attendance management system solution
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Realize the functions of real-time tracking and positioning of mine personnel, monitoring and query of moving targets, personnel safety assurance and statistical attendance and other functions. Make full use of the mine safety monitoring system platform, no need to repeat wiring, only need to increase the corresponding personnel tracking and positioning wireless data acquisition base station, wireless coding transmitter, personnel tracking and positioning processing software to achieve. The system has the advantages of no need to re-wiring, saving investment; use and maintenance workload is small, low maintenance costs; the adopted wireless communication technology is mature, large coverage, low power consumption and other characteristics. The new mine personnel tracking and positioning and attendance management system can clearly grasp the location and activity trajectory of each personnel in the mine, which can provide a scientific basis for accident rescue. At the same time, the daily attendance management function of the system can also be used to conduct attendance management for all mine personnel.
1. System design
1). Following the principle of “unified card issuance, unified equipment, and unified management”, the system of “one person, one card” shall be implemented according to the permitted personnel on duty, and the personnel identification card shall be used as the “post permit” or “tunnel access permit”. The system database records the basic information of the person corresponding to the person’s identification card, including basic information such as name, age, gender, team, type of work, position, photo, and validity period. Personnel entering the tunnel must carry the identification card (identification card can be carried on the belt or affixed to the cap of the miner’s lamp).
2). Install intrinsically safe data collectors in underground tunnels, tunnels, work surfaces and other locations. When the card holder passes the location where the data collector is set up, the system will read the card number information, and transmit the location and time of the card holder to the ground monitoring center for data management through the transmission network. If the collected card number is invalid, there is no card or enter the restricted channel, the system will automatically alarm, and the personnel on duty in the monitoring center receive the alarm signal and immediately execute the relevant safety work management procedures.
3). Once an accident occurs underground, the monitoring center can know the basic information of the trapped person in the first time, such as: the number of personnel, the identity of the personnel, their location and other relevant information, so as to facilitate the development of the accident rescue work. Search and rescue personnel can enter the mine with a portable search and rescue device for search and rescue.
4). The system can automatically generate report data on the statistics and management of attendance operations to improve management efficiency.
2. Working principle
The controller in the system product sends out the low-frequency encrypted data carrier signal through the transmitting antenna; the identification card carried with you enters the working area of the low-frequency transmitting antenna and is activated (the identification card does not work if it does not enter the working area of the transmitting antenna), and at the same time, The encrypted information carrying the target identification code is transmitted by the high-frequency transmitter module in the card; the receiving antenna receives the carrier signal sent by the identification card, and after receiving and processing by the controller, the target identification code is extracted and sent to the dedicated underground processing and transmission sub-assembly. Station, complete the preset system functions, so as to achieve the goal of automated management.
3. Main features
1) Real-time dynamic tracking and monitoring of underground personnel, and automatic position display;
2) The area and movement track playback of the underground personnel in the specified time period;
3) Real-time query and print the current number and distribution of underground personnel;
4) It can search and locate the buried personnel at the accident site for timely rescue;
5) Attendance, statistics, storage and printing of personnel entering the well;
6) System monitoring host, fully pre-installed WIN98/2000 operating system and the latest version of monitoring software;
7) The static and dynamic editing and drawing of the monitoring chart page is open to users, supports a variety of graphic formats, and can be operated by the mouse and keyboard. Fully supports real-time multitasking. While the system is collecting real-time data, the system can record, display, query, edit, manual entry, network communication, etc.;
8) The screen is displayed in a page format, graphics and text are compatible, and the information displayed on each page is defined and compiled by the user until the screen is full;
9) The system central station and network terminals can be operated in a local area network, so that all terminals on the Internet can share monitoring information and system comprehensive analysis information, and query various data reports within the scope of use authority;
10) 64 personnel positioning sub-stations can be continuously and centrally monitored and processed at the ground central station, with 65,535 monitoring and processing personnel;
11) The monitoring software has strong drawing capabilities and provides a corresponding graphic library. The operator can easily realize online and complete graphic editing, drawing and modification while continuously monitoring;
12) Local area network resource sharing of personnel monitoring information under authority management;
13) The monitoring sub-station is designed with local initialization function, which can store the address and other settings of the monitoring sub-station of the ground central station. When the communication cable is broken, short-circuited and other serious faults, the ground central station loses contact with it. The monitoring substation can still work independently, storing personnel monitoring data, and does not affect the normal operation of other monitoring substations;
14) The personnel substation is designed with high-reliability protection circuit and program error correction function. When the substation fails, it can automatically reset and restart the single-chip microcomputer in a very short time;
15) In the design of the personnel substation circuit, safety barrier isolation circuits and protection circuits are added to all input and output circuits connected to the outside world to prevent damage to the substation caused by external factors such as miswiring or abnormal line signals, so that the monitoring The reliability of the substation can be further improved;
16) The sub-station has the function of local Chinese character LCD display personnel code and calendar clock, and the remote control can be used to record and query;
17) It can communicate with the ground system monitoring host in RS485 or DPSK mode;
18) The wireless personnel code transmitter adopts low-power design, is light in weight, does not need an external power supply, and has a variety of carrying methods to choose from.
4. System composition
The system is composed of ground center station, transmitter, wireless data monitoring station, receiving probe, power supply, cable, transmission interface and other auxiliary equipment.
Ground center station: Advantech industrial computer, operating system Windows2000 Professional, memory 256M, hard disk 80G, optical mouse are selected as the host. The host computer is connected with the KJJ14 surface transmission interface through the interface, and communicates with the detection stations located in the underground. The central station can be equipped with a laser printer to print relevant reports and information. If you need network browsing function, you need to configure another computer as a server.
Wireless code transmitter: installed in the battery box of the miner’s lamp, a system can have up to 16,384 transmitters, and the code is solidified without re-code.
Intrinsically safe power supply: It supplies power to the underground substation, and its backup battery can ensure that the substation can work continuously for less than 4 hours in the case of AC power failure.
RFID special detector: generally placed in the light room, it can be used to register temporary people going down the well, and it can also be used to detect the quality of the wireless code transmitter.
Data detection stations: Generally, detection stations are set up at each wellhead and main branch. The total number of data detection stations in a system usually does not exceed 127. Each substation is equipped with 2-4 receiving probes, the standard configuration is two, and the receiving head can be purchased separately according to the specific situation of the mine.
5. Main technical indicators
System capacity: 127 data monitoring sub-stations can be connected, 16,384 wireless encoder transmitters
Transmission mode: master-slave mode, half-duplex; RS485 transmission mode is adopted
Transmission rate: 4800/9600/115200bps (user can set)
Maximum transmission distance from the ground central station to the data monitoring substation: 15km;
Power supply voltage of code transmitter: DC1.5V~5.5V;
The maximum effective receiving area radius of the data monitoring substation: 80-200 meters (on-site setting);
The data monitoring sub-station can detect 300 people at the same time;
Working frequency: 433-434MHZ
Working range: -100C~600C
Transmission system: 1.5mm2 copper core twisted pair cable, DC resistance no more than 12.5 ohm/km, working capacitance no more than 0.06F/Km, and inductance no more than 800mH/Km;
The maximum moving speed of the tested target is allowed: 5m/s when more than 100 people pass at the same time, 15m/s when 30 people pass at the same time, and 20m/s when the number of people is less than 20;
The software is the network version of the configuration module, which can be developed twice and has independent intellectual property rights;
The system is capable of real-time query of current underground personnel, identity, and regional information, and can be used for personnel at the scene of the accident.
Signal System
Data communication interface and card reader station communication signal: RS485 signal;
Data communication interface and computer communication signal: RS232 signal;
6. Technical characteristics
▲Multiple signal acquisition
▲Very low current consumption
▲250kbps 2.4GHZ IEEE802.15.4 compatible radio frequency transceiver
▲< 10us fast activation/sleep state transition
▲Hardware layer encryption and authentication security features
▲Digital signal strength (RSSI) and wireless connection quality (LQI) support
7. 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) General technical conditions and use management specifications of the underground coal mine personnel position monitoring system of the State Administration of Work Safety.
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