Mobile applications have been extremely popular in recent years. Mobile Internet methods such as WeChat Pay and Alipay to pay parking fees have become popular in the parking lot field, which has led to the rise of mobile phone access control in the tepid access control industry.
At present, there are four main solutions for smart access control at the technical level: Bluetooth, NFC, QR code, and WIFI. The following is a simple analysis of the implementation of these four technologies.
Technical background: Bluetooth technology is already very mature. It is a wireless technology standard that can realize short-distance data exchange between fixed devices, mobile devices, and building personal area networks. Bluetooth can connect multiple devices, overcoming the problem of data synchronization.
Implementation method: Bluetooth access control can be connected to the access control at a distance of about 8 meters without interference from obstructions. The Bluetooth service is called through the app on the mobile phone, and smart hardware is installed on the access control. After receiving the Bluetooth command, the door lock can be controlled. .
Technical background: This technology evolved from non-contact radio frequency identification (RFID). Communication (Near Field Communication, NFC) is a short-range, high-frequency radio technology that runs at a distance of 10 cm at a frequency of 13.56MHz. Its transmission speed is 106 Kbit/sec, 212 Kbit/sec or 424 Kbit/sec.
Implementation method: First, a mobile device with an NFC function is required. Second, you need to configure hardware that can read virtual credential cards from NFC-enabled mobile devices. Finally, an ecosystem must be developed that includes mobile network operators, trusted service managers, and other operators that provide and manage mobile credential cards.
Technical background: Two-dimensional bar code/two-dimensional bar code (2-dimensional bar code) is used to record data symbol information in black and white graphics distributed on a plane (two-dimensional direction) with a certain geometric figure according to a certain rule; in the code In the programming, the concept of "0" and "1" bitstreams that constitute the internal logic of the computer is used cleverly, and several geometric shapes corresponding to the binary system are used to represent the text value information, which is automatically recognized by the image input device or the photoelectric scanning device. Reading to realize automatic information processing; has some common features of barcode technology: each code system has its specific character set; each character occupies a certain width; it has a certain check function, etc. At the same time, it also has the function of automatically identifying different lines of information and processing graphics rotation change points.
Implementation method: QR code access control uses a QR code as the medium and carrier for personal identification. The system allocates an encrypted QR code to each user in real-time. The user can open the corresponding QR code by scanning the QR code on the access control device. Door lock.
Almost all smartphones, tablets, and laptops support Wi-Fi Internet access, which is the most widely used wireless network transmission technology today. WIFI is not affected by the hardware chip and operating system, and the connection speed is fast, and it can be connected one-to-many, and it can also be directly connected to the Internet. The WIFI protocol implements the globally unified standard 802.11n protocol, which is forward-looking. Since its release, it has never been replaced, there is no compatibility problem, and it is compatible with all mobile phones.
Implementation method: It is widely used in smart communities, usually used with monitoring, and access control management through APP.
Summary
The emergence of mobile phone access control has made people's lives smarter and more convenient, but there is still a long way to go before it is fully popularized. For now, mobile phone access control can only be said to be the icing on the cake, and the application scenarios are also very limited. In the practical application of the solution, the combination of mobile phone access control and traditional access control methods can not only meet the intelligent needs of the younger generation but also retain cards or fingerprints to meet the needs of the older generation.
Author: Written by Mr.Andy Zhang from S4A INDUSTRIAL CO.,LIMITED
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