Application Case of Personnel Positioning and People Counting Management System in Shanghai Renwei School
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1. System Significance
1) No need to swipe card, automatic attendance. Abandon the traditional card close to the card reader to swipe the card for attendance, and automatically count the number and attendance of students entering and leaving the gate;
2) Let teachers and students not feel controlled and enjoy VIP-style access control.
3) Strengthen the management of school personnel positioning and number of people, improve the school’s security level, and dynamically understand the situation of students in real time to ensure the safety of students in school.
2. System Architecture and Scheme Explanation
The school personnel positioning and number statistics management system is based on the actual school management needs of Shanghai Renwei Electronic Technology Co., Ltd. to strengthen the management of the number of personnel in the school area, using dual-frequency semi-activeRFIDTechnology to track and record the entry and exit of each person in classrooms, libraries, canteens and other places, to achieve high-efficiency automatic identification requirements, and count the number of personnel in classrooms, libraries, and canteens. At the same time, some dangerous areas of the school are located and alarmed.
2.1 Access Control Identification
Schematic diagram of entry and exit identification
Each RFID dual-frequency card has a tag ID number. When the RFID card appears in the wake-up area of the low-frequency activator induction antenna, the induction card is activated by the electromagnetic wave signal continuously emitted by the low-frequency activator antenna. The low-frequency chip of the tag will analyze the antenna number of the activator in real time, and at the same time detect the RSSI field strength value of the low-frequency signal, and then wake up and transmit it to the tag, and then the tag will turn on the 2.4G wireless radio frequency chip for a strong signal transmission (wireless transmission The data packet contains the tag ID and activator antenna number and the low frequency field strength RSSI value). The 2.4G long-distance reader within the effective identification range will receive the data packet transmitted by the tag in the 2.4G frequency band, parse out the tag ID number and activator antenna number in the data packet, and upload the RSSI value to the host immediately. computer, so as to realize the identification of the RFID card. By deploying two sets of low-frequency induction antennas, automatic identification of people entering and leaving and counting of people in the area are realized.
2.2 Regional positioning
Schematic diagram of personnel area positioning
Personnel area positioning is carried out in some key areas or dangerous areas. Once entering the area, personnel positioning will be carried out and alarm prompts will be realized. At the same time, combined with the video monitoring function, video linkage will be realized. The low-frequency activator rod antenna is used, and the activation area of each antenna is adjustable from 1m to 10m. When a person enters the antenna wake-up area, the tag sends the tag ID and the activated antenna address code ID in real time, and 2.4G long-distance reading and writing After the receiver receives it, it is directly used as the data basis for the location of the personnel area. At the same time, alarm prompts and video linkage analysis can be performed.
3. Case introduction
Statistical Project of Personnel Positioning and Number of Personnel in the Third Experimental Kindergarten of Jinjiang City, Fujian Province
Statistical project of personnel positioning number of a kindergarten linking college in Beijing
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