With the construction of "digital campus", the application of security products on campus has become more and more extensive, and has become a major part of the construction of digital campus. In particular, colleges and universities have a large area, many buildings, and a large crowd density. The vast majority of faculty members and students are boarding. Divided by area, the key prevention areas of colleges and universities generally include teaching areas, living areas, public areas, etc., and the dormitory / apartment as a living area is the top priority of safety prevention management.
The traditional management method of student dormitory is usually manually managed by the dormitory administrator. Due to the large number of rooms and students in the dormitory building, it is difficult for one or two dormitory administrators to have the energy to manage the entire apartment building. So this method will cause certain security risks and cause some problems in dormitory / apartment management:
1. The management is chaotic, and it is easy to let some extraneous and miscellaneous personnel mix in due to human negligence, causing hidden dangers to the personal and property of the students.
2. Checking the bed takes time and has a heavy workload, which affects students' work and rest.
3. Students privately change to apartment buildings.
4. The parcels, letters, etc. transmitted by the dormitory management personnel on behalf of them cannot be delivered to the students in time.
With the development of RFID technology, more and more colleges and universities began to adopt RFID technology for attendance management of student dormitory / apartment. By placing barrier-free access at the entrance of the dormitory building (due to the fire control requirements of the dormitory / apartment, the form of a gate is generally not used.) To attendance of the people entering and exiting, and at the same time, joint management of video surveillance, access control and other management methods Hit the safe environment of student dormitory / apartment. At present, the application of RFID technology is roughly divided into different technologies such as low frequency, high frequency close range, and high frequency long range according to different frequency bands. Each technology category also differs in application according to its own characteristics. The following summarizes the application methods and advantages of each technology in dormitory / apartment.
1. Low frequency
The working frequency of low-frequency RFID is 125KHZ, 134KHz. Students wear cards to read information automatically through the channel, and the placement distance of the low-frequency channel is about 80cm. The advantage of low-frequency RFID is that low-frequency is basically not affected by water and liquid, and wearing tags on the human body will not affect the reading effect of the channel on the card. Can carry out the alarm for card-free personnel. In this way, it is possible to prevent students without a card from entering or outsiders from entering the campus. In addition, the low-frequency RFID tags are cheaper and the cost investment is relatively small. Affected by its technical characteristics, the speed of personnel passing through the low-frequency channel is not ideal. The main reason is that the low-frequency channel cannot support simultaneous reading of multiple tags, so only one person is allowed in the channel at a time, which obviously cannot meet the needs of the dormitory during the morning, middle and evening peak periods. In addition, the low frequency is not easy to be incorporated into the existing college card platform.
2. High frequency and close range
The frequency band of high-frequency RFID is 13.56Mhz, which is divided into two types, one of which is the short-range 14443 protocol. The reading distance of this technology is 2-10cm. High-frequency and close-range cards are very common in colleges and universities. Due to its good security and confidentiality, college consumers usually use such cards, which is the most commonly used card in colleges and universities. card. The card reading rate is the smallest among all technologies, almost 100% read.
However, high frequency and close range are not very suitable in the management of dormitory / apartment. The most important thing is the speed of traffic. Because students need to take the initiative to get close to the device and swipe to read, the traffic speed is very slow, which is even lower than the low-frequency RFID traffic efficiency. Some schools also use a high-frequency close-range attendance machine at the entrance and exit of the apartment to use it, giving up the use of the channel. In this way, the efficiency of traffic is improved. Once this is the case, no card-free personnel can be alerted. Due to the inherent inertia of many people, many students are also reluctant to take out their cards to swipe in and out. Then, the safety management of the dormitory will be useless.
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