A case of automatic attendance and positioning management of tunnel personnel based on 433MHz RFID
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Scheme background
Personnel safety management and attendance in tunnel and urban rail projects have long been valued by all parties concerned. Due to the complex engineering environment and the large number of personnel, it has brought a lot of inconvenience to management; locating personnel in different tunnel sections can help rescue accidents. Organizations provide accurate and reliable information, improve rescue efficiency, and reduce accident losses, which are necessary measures for disaster prevention. In addition, the automatic attendance function also provides a strong basis for employees’ salary calculation, which reduces the pressure of manual attendance and avoids the negligence of manual attendance.
Program features and advantages
1. 433MHz activeRFIDThe technology has the characteristics of strong penetrability, strong diffraction, and long transmission distance, and is suitable for various complex environments, especially for complex environments such as tunnels.
2. In view of the penetrating and diffracting characteristics of 433MHz, the electronic tag can be pasted in the safety helmet or hung on the chest in the form of a badge, which is convenient to carry.
3. The 433MHz active RFID has the function of RSSI signal strength indication, which can judge the distance according to the RSSI signal strength.
4. Strong diffraction, overcoming the problem that other RFID technologies are easily blocked by signals between batches of personnel.
5. Automatic long-distance identification, long card reading distance (adjustable from 1-150 meters), no need to swipe the card near, just follow the normal path to identify, suitable for batch personnel to quickly pass through the identification 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 and equipment, 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 handheld devices. For emergency evacuation drills, etc., just use a mobile phone with a portable Bluetooth reader or handheld to scan the information of the personnel in place at the assembly location, which is convenient for emergency evacuation personnel to take inventory.
9. For accidents such as landslides, mobile phones can also be used with portable BluetoothReaderOr check the trapped personnel information with a handheld device. The electronic tag signal can pass through the soil and rock layer of about 1 meter, which not only provides convenience for rescue, but also improves the efficiency of accident rescue.
Scheme principle
The system consists of “application software server”, “monitoring computer”, “RFID reader/writer” and “RFID electronic label”.
Working principle: Distribute “RFID electronic tags” for each employee to realize one card per person. Employees paste the “RFID electronic tag” in the safety helmet or hang it on the chest (it is best to uniformly stipulate the carrying method); the sub-sections in the tunnel Install the “RFID reader/writer”, and distribute the management computer and install the management software in the duty room.
When people pass through different road sections, the corresponding “RFID reader” obtains the “RFID electronic tag” signal, and transmits the signal to the monitoring computer, and the monitoring computer can know the current personnel information and personnel location status.
Main function introduction
1. Personnel positioning: real-time display of personnel’s location and time
2. Staff attendance
3. Query and statistics of attendance records
4. Online leave application and approval functions on the management side
5. Online query function: query and statistics of attendance records
6. Check the current location and historical location of employees online
7. Positioning dynamic display
Project site:
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