RFID-based automatic attendance and location management of underground (coal, mine) personnel
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1. Project background
The underground personnel automatic attendance and positioning management system is a comprehensive application system integrating underground personnel attendance, tracking and positioning, post-disaster first aid, and daily management. The system uses the corresponding mine personnel tracking and positioning equipment, real-time automatic tracking and attendance of the personnel entering the well around the clock, keeping track of the location and activity trajectory of each employee underground, and grasping the location distribution of the underground personnel at any time, so as to ensure the safe production and daily life of the enterprise. The management is improved, and it serves as a reliable command basis for emergency first aid.
2. Program features and advantages
1. 433MHz active RFID technology has the characteristics of strong penetration, strong diffraction, and long transmission distance, which is suitable for various complex environments.
2. In view of the penetrability and strong diffraction of 433MHz, the electronic tag can be affixed to the helmet or hung on the chest in the form of a badge, and it can also be placed in a clothes pocket, which is convenient to carry.
3. 433MHz active RFID has an RSSI signal strength indicator function, which can judge the distance based on the RSSI signal strength.
4. Strong diffraction, which solves the problem that other RFID technologies are easy to block each other’s signals among batch personnel.
5. Automatic long-distance recognition, long reading distance (adjustable from 1 to 150 meters), no need to close to swipe the card, just follow the normal path to enter and exit, it is suitable for batch personnel to quickly pass the recognition at the same time (theoretical calculation, the speed is It can be effectively identified within 200KM/H).
6. If you want to manage engineering vehicles, equipment, etc., you only need to install electronic tags on the vehicles and equipment, and the reader can identify them at the same time.
7. Ultra-low power consumption, no radiation damage, safe and reliable use.
8. Due to the powerful long-distance characteristics of 433MHz RFID, it gives great convenience to the application of handhelds. For emergency evacuation drills, etc., you only need to use a mobile phone with a portable Bluetooth reader or handheld to scan the information of the people in place at the assembly point, which is convenient for the emergency evacuation of personnel.
9. For collapses and other accidents, mobile phones can also be used with portable Bluetooth readers or handsets to check the information of trapped persons to improve the efficiency of accident rescue.
Three, the principle of the scheme
The system is composed of “application software server”, “monitoring computer”, “RFID reader (explosion-proof type)” and “RFID electronic tag (explosion-proof type)”.
working principle:
Allocate “RFID electronic tags” to each employee to realize one card per person. Install “RFID readers” in sections in the mine, distribute management computers and install management software in the duty room.
When personnel pass through different sections of the mine, the corresponding “RFID reader” obtains the “RFID electronic tag” signal, and transmits the signal to the monitoring computer, and the monitoring computer can learn the current personnel information and personnel location status.
Fourth, the main function introduction
1. Personnel positioning: display the position and time of personnel in real time
2. Staff attendance
3. Inquiry and statistics of attendance records
4. Online leave application and approval function of management terminal
5. Query the current location and historical location of employees online
6. Positioning dynamic map display
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