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.
st important of the whole process, is also the most difficult part is to deliver and manage these data. EPC numbers of Things network, the Reader will be collected to send to the Middleware, middleware for processing of these data to obtain useful data to the application system. Figure1 shows the RFID system flow chart.
Figure 1 RFID system flow chart
RFID middleware plays an intermediary role between the RFID Reader and applications. Internet of Things applications to specify a rule, the booking of the tag data to the middleware, and applications to the middleware rules maintained by the middleware. Defined in the rule: the reader to inventory data, labeling data reporting cycle start and end conditions, the tag data how to filter tag data contains the raw data.
The application client uses middleware provided by a set of common application programming interface (API) that is able to connect to the RFID reader to read RFID tag data. As a result, even if the RFID tag information is stored database software or back-end applications to increase or change replaced by other software, or other types of read and write RFID reader occurs, the application side need to modify to be able to handle, eliminating the need for many to many connections to maintain the complexity of the problem. RFID middleware is a message-oriented middleware (MOM), the information is in the form of the message, sent from one program to one or more program information can be transmitted in an asynchronous manner, so send does not have to wait for a response. Message-oriented middleware contains features not only the transmission of information, interpret the data must also include security, data broadcasting, error recovery, locating network resources, find out the cost of the path, message priorities and requirements as well as an extension of the debugging tools and other services.
4. Things Industry wide range of applications
The Internet of Things is an extension of the Internet is an important part of the new generation of IT. Interconnection between objects and the Internet of Things, with a comprehensive sense, reliable transmission, intelligent processing features, so that mankind can use more refined and dynamic management of production and living, thereby increasing the information capacity of the community as a whole.
Internet of Things refers to things and things of interconnection between networks and applications, are widely used in such fields as transportation, logistics , security, electricity, home, divided into three parts of the perception layer, network layer and application layer, sensing layer including a variety of perceived devices and terminal equipment, sensing devices, including RFID tags, two-dimensional code, a variety of sensors , cameras and other network layer is divided into two parts of the access, transport, application layer, including a variety of application services platform. The more mature applications such as smart logistics, smart transportation, smart grid, security monitoring, smart card system.
Industry chain from the point of view, the hardware responsible for the production of all levels of hardware devices, such as the perception of the devices、 terminal equipment、network hardware and servers etc. Software companies responsible for various aspects of software development, data collection, transmission, storage, processing and display functions. Sy
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