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I. Overview
The underground personnel positioning management system is a comprehensive application system developed and produced by Changzhou Qianwan Electronic Technology Co., Ltd. to meet the needs of the mining market, integrating underground personnel positioning, attendance, hardware equipment maintenance, and daily management.The system adopts the latest internationalRFIDTechnology, through the non-contact information collection and processing of long-distance moving targets in coal mine tunnels, it realizes automatic recognition of people, vehicles, and objects in different states, and timely and accurately reflects the dynamics of personnel and equipment to the ground computer system, It is convenient for management personnel to make reasonable scheduling arrangements; collect and sort information of underground personnel, and form various files through software to feedback attendance information for management personnel; when an accident occurs, rescue personnel can also follow the information provided by the underground personnel positioning system Data and graphics can quickly understand the location of relevant personnel, and take corresponding rescue measures in time to improve the efficiency of emergency rescue work and minimize disaster losses. The underground mine personnel positioning management system is of great significance for improving the management level of the mine and ensuring the automatic and safe production of enterprises.
2. System overview
2.1. System composition
The system is a coal mine underground management system designed with the most advanced 2.4G-based wireless network technology for personnel positioning and attendance.
The system consists of a video monitoring system, an attendance positioning system, an LED display system, and a management system.
Attendance positioning system: 2.45G long-distance time and attendance card reader (monitoring base station), 2.45G long-distance positioning card reader (monitoring base station), 2.45G active radio frequency card, control cable, signal cable, RS232-RS485 converter , Power strip
LED display system: outdoor high-brightness LED screen, display dedicated graphics card, dedicated synchronization card dedicated display dedicated switching power supply, display software power cord, network cable, power strip, mounting bracket
Management system: monitoring computer, attendance software, UPS power supply, AC voltage stabilizer, power strip, serial server
Three, working principle
3.1 2.4G active radio frequency card:
Constructors or workers carry them with them, usually on their belts or helmets. The card has two-way and one-way: the one-way card can only send its own ID number. The two-way card can not only send information to the monitoring center, but the monitoring center can also send information to each construction worker. At the same time, the two-way card has a button and indicator light. , You can press the emergency button to call for help in case of danger. If the general project is mainly based on attendance, it is recommended to use a single card; if the system is mainly based on attendance and positioning, it is recommended to use a two-way card. For example: when there is a special situation in the tunnel, the construction staff only needs to press a button, and the monitoring center will sound an alarm. When something happens in the monitoring center, the monitoring center can send a signal to each of the construction workers, or it can send a group message to indicate it through the indicator light.
3.2 2.45G long-distance card reader:
No matter it is inside or outside the tunnel, a card reader needs to be installed. At least 2 units are required in one system. If it’s positioning, you need more. Specific installation should be carried out according to the conditions of the tunnel. The general principle is to install one every 150 meters, and it can also be installed in corners and some areas that require special monitoring. The positioning principle of this system is regional positioning, which is based on the position of each reader. Therefore, the accuracy of positioning depends on the recognition distance of the reader. The distance of the reader can be adjusted by software, so the positioning is considered The accuracy should also consider the distance of the card reading and the overall cost of the system. That is to say, the higher the positioning accuracy, the closer the card reading distance is, the higher the cost. Please note!!!!!
3.3 RS232/485 converter:
The system adopts RS485 transmission mode, and the main function of the converter is to convert RS485 signal to 232 signal, which is connected to the computer through the serial line.
3.4 Wireless bridge:
The wireless bridge is used for the wireless transmission of personnel positioning signals in the tunnel and the wireless transmission of the video monitoring system in the tunnel.
3.5 The host computer of the management center:
Installed in the monitoring room not far from the tunnel entrance, the computer is equipped with attendance and positioning software, and the construction personnel are monitored through the computer. It is connected to the terminal through a serial port. At the same time, the host computer also controls the display content of the LED screen.
3.6 LED display:
Installed near the tunnel entrance, used to display the information of the construction personnel, so that the management is advanced and transparent. The displayed content includes: tag number, name, time, and total number of people (the size of the screen is 1.28M*0.8M, and the screen can also be larger).
3.7 Video surveillance system:
Using video software and related drivers to drive hardware cameras, dome cameras and other equipment to exert its infinite potential, the ancient myth “Clairvoyance” is no longer a legend. Through this system, we can spy on everything in the cave at any time.
3.9 Other matters
(1) The number of card readers and the installation method are determined according to the actual situation of the tunnel site, and the two parties shall negotiate and settle.
(2) Software function: The function of the system software is developed according to the customer’s requirements, please communicate with the software developers of our company before the software development.
Fourth, the main purpose of the system and product features
4.1 Excellent performance
★ High recognition reliability: 100% front-end recognition rate. As long as the construction personnel wear the 2.4G active radio frequency card correctly (unless it is broken), it can be read by a nearby card reader.
★ Long recognition distance (0-50 meters): It can reach a stable distance of 50M in the tunnel, and the information sent by the tag card within this range will be read.
★ Highly anti-collision: Each detection point can simultaneously identify up to 50 construction personnel’s information.
★ High recognition stability (error rate is less than one hundred thousandths), truly achieve no errors and no missing cards.
★ Fast recognition speed: the fastest recognition speed can reach 200 km/h, that is, it can recognize dynamic tag cards.
★ Two-way alarm function: the construction personnel can call the monitoring center through the label button; the monitoring center can also send information to the label. (The function of two-way card, one-way card does not have this function)
4.2 Convenient and wide application
In line with the existing network conditions of the tunnel, it can provide multiple tunnel-to-tunnel transmission methods based on optical fiber, Ethernet, communication cable, etc., which are highly adaptable and do not require high on-site environment, avoiding implementation difficulties and problems caused by a single transmission method. bottleneck.
4.3 High safety and stability
★ It has safe explosion-proof, dustproof and waterproof performance
★ High anti-interference, no special requirements for tunnel interference source and surrounding environment, strong environmental adaptability
★ The internal circuit is highly integrated, the device failure rate is minimized, and the operation is reliable
★ Using active identification card, no electromagnetic pollution, maintenance-free, safe to use
4.4 Simple and convenient operation
★ The software has a full Chinese menu with a good operation interface
★ Integrated structure design of wireless monitoring sub-station, convenient and quick installation
★ The built-in battery of the identification card, ultra-low power consumption, no need for an external miner’s lamp power supply, no need to charge
★ The two-way card can replace the battery
4.5 Rich query and report functions
★ Query and report output, printing functions are simple and easy to operate
★ Inquire about the attendance information of construction personnel, departments and cadres
★ Inquire about the construction personnel’s movement trajectory
★ Various information reports can be output as required (such as: tunnel entry time report, personal attendance daily report, construction worker attendance monthly report, department attendance monthly report, etc.)
★ The real-time situation of the tunnel can be viewed remotely on any computer with Internet access, without the need to go to the scene. (Online version software function)
It can be known at any time how many people there are in the cave, who are these people, and can be displayed on the LED display at the same time. The specific display content depends on the size of the display.
Five, system software functions
5.1 Attendance management function
★ Through the card reader, it can be judged that the construction personnel are in and out of records at any time.
★ Able to add, modify, and inquire about construction personnel, cadres and department information.
★ Employee Attendance Inquiry: The attendance status of personnel can be inquired by department and various specified conditions, such as: number, name, shift, type of work, department and other query conditions; it can be automatically sorted according to any conditions;
★ Cadre Attendance Inquiry: Query and display the attendance status of all cadres on the day;
★ Reports can be output according to user requirements
5.2 Positioning management function
★ You can inquire at any time and display the identity, quantity and distribution of personnel and equipment in a certain area.
★ Query the current actual position and activity track of one or more personnel and equipment.
★ Record a series of information such as the arrival/departure time and total working hours of relevant personnel and equipment at any location, and can supervise and confirm whether important inspection personnel (such as: safety inspection personnel) conduct on-site inspections on time and on-site, or conduct various inspections. The detection and processing of items of data will fundamentally prevent related accidents caused by human factors.
5.3 Query Statistics
★Construction staff query: You can customize the combination of conditions to query the current area of the construction staff, the detention time and the leader of the shift into the tunnel.
★ Query of Worker Distribution: Query the distribution of construction personnel in each area of the tunnel, so that managers can easily know the number of workers in a specific area. Click on the corresponding area to get detailed information about the relevant personnel.
★ Inquiry of unreached areas: to inspect and assess the situation of relevant responsible persons and follow-ups, and to inquire whether a special type of work has reached all areas of its work scope. Click on the relevant status to get the detailed records of the arriving personnel and work.
★ Statistics of construction personnel: The number of construction personnel entering and exiting the tunnel can be counted according to the date.
★ Regional population statistics: You can arbitrarily set and manage related construction areas, and automatically perform regional population statistics.
5.4 First aid information after a disaster
Once a safety accident occurs, the control host can immediately display information such as the number of personnel, personnel information, and personnel location at the accident site, which greatly improves the rescue efficiency and rescue effect
5.5 Information networking function
By setting up a WEB server, information sharing can be achieved by browsing web pages, and the client does not need to add any additional software. (The computer in the monitoring room is required to be able to access the Internet)
5.6 Other functions
If the above functions cannot meet your requirements, we can tailor the functions for you.
Six, hardware equipment
6.1 ML-M5000 Mine Card Reader
6.2 Active radio frequency card
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