摘要:Internet of Things of course build a very good blueprint, but the current global situation to the development of things facing many problems, such as the Internet of Things, you must first memory bank to embed electronic tags on all items, and need to install a number of read equipment and a huge amount of information processing system, which will inevitably lead to a lot of capital investment. The items attached storage will lead to the rise in cost of goods, cost has not yet dropped to the popularity of the premise, the development of the Internet of Things will be limited.
: "We are now standing at the entrance of a new era of communication, in this day and age, we know the Internet will be undergoing a fundamental change in the ITU report of Things There are four key technologies: tag things RFID sensor network technology, perceive things, thinking things smart technology nanotechnology, miniature things.
2.2.1 RFID
RFID (radio frequency identification, radio frequency identification) RFID is a non-contact automatic identification technology, automatic target recognition by the RF signal and access to relevant data, the recognition process without human intervention, can work in a variety of harsh environments. RFID technology can identify the high-speed moving objects can also identify multiple tags, quick and easy operation. RFID technology and the Internet, telecommunications and other technology, can be realized goods tracking and sharing of information worldwide.
Compared with the current widespread use of automatic identification technology such as cameras, bar codes, magnetic cards, IC cards, RFID technology has many outstanding advantages: First, non-contact operation, long-distance identification (a few centimeters to tens of meters), so without human intervention to complete the identification work, the application of convenience; Second, no mechanical wear, long life, and can work in a variety of grease, dust, pollution and other harsh environments; can identify fast moving objects can also identify multiple electronic tags; the reader has a physical interface does not open directly to the end user, to ensure its own security;, data security, except the password protection of electronic tags, data portion can be used a number of algorithms to achieve security management; Sixth, there is a mutual authentication process between the reader and the tag, secure communications and storage.
Currently, RFID technology in industrial automation, object tracking, transport control and management, security and military purposes has been a wide range of applications.
(1) the basic components and how it works
The most basic RFID system consists of the following part of the composition:
① Electronic tags: The coupling components and chips, and each electronic tag has a globally unique identification number cannot be modified, cannot imitate, so to provide security. Electronic tag attached to the object to identify the target object. The electronic tags are normally saved in the agreed format of electronic data, in practical applications, the electronic tag attached to the surface of the object to be recognition.
②Reader: read (or write) the equipment of the electronic tag information can be designed for handheld or fixed.
③Antenna: wireless communication between RFID tags and readers, RF signal space propagation and the establishment of connected devices.
④Middleware: a message-oriented, and can accept requests by the application software side, initiate and receive specified one or more readers, the results of data processing returns to the application software specialization software.
⑤Application Software: end-user of RFID applications-oriented interactive interface to help users complete the instruction operation of the reader, as well as middleware logic set, and step by step to RFID atomic events into use can understand the business events, and use visual interface display.
The basic working principle of the RFID te
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