Internet of things is a new generation of highly integrated information network technology and the comprehensive utilization of the new round of industrial revolution is an important direction and driving force for cultivating new economic growth point, promote industrial restructuring and upgrading, improve social management and public service efficiency And level, have a very important impact. As a result, the Internet of Things has been vigorously developed in all aspects of society. The industrial chain of the Internet of Things can be subdivided into four parts: identification, perception, information transmission and data processing. The core technologies included are radio frequency identification technology, sensor technology, network communication technology, embedded system technology and Five other cloud computing. First, RFID technology RFID (Radio Frequency Identification) technology is a non-contact automatic identification technology, the use of radio frequency signals and their spatial coupling transmission characteristics, to achieve static or mobile objects to be identified automatically identify the collection point for the information of "standardized" logo . In view of the RFID technology can realize non-contact automatic identification, all-weather, identify penetrating ability, contactless wear, at the same time realize the automatic identification of many items and many other features, this technology is applied to the field of Internet of things, The Internet and communication technologies combine to enable the tracking and sharing of information worldwide. It plays a crucial role in the Internet of Things (IoT) to "identify" information and short-range communications. On the other hand, the product electronic code (EPC) using RFID tag technology as a carrier, greatly promoted the development and application of Internet of things. Second, the sensor technology Valuable information requires not only radio frequency identification but also sensing. IoT often in the natural environment, the sensor will be bad test of the environment. Therefore, the requirements of the sensor technology will be more stringent and more demanding. The sensor can collect a large amount of information, it is the essential information ingest device of many equipment and information system. Without sensor detection, alternation and capture of the initial information, none of the controls and tests can be achieved. Even state-of-the-art computers do not function effectively as sensors without the information and reliable data. The breakthrough and development of sensor technology has three aspects: network, perception of information, intelligence. Third, network communication technology Network communication technology includes many important technologies, of which M2M technology is the most critical, the technology range is widely used, not only with long-distance, but also with the short-range technology convergence. Today's M2M technology takes machine-to-machine communication as its core, and professionals in the fields of architecture, aerospace, medicine and agriculture are trying hard to achieve them in the future. Fourth, embedded system technology Embedded system technology is a complex technology integrating computer hardware and software, sensor technology, integrated circuit technology and electronic application technology. After decades of evolution, intelligent terminal products featuring embedded systems are ubiquitous; small-to-medium-size MP3s and astronautical satellite systems. Embedded systems are changing people's lives and driving industrial production and the defense industry. If the IoT with the human body to make a simple metaphor, the sensor is equivalent to the human eye, nose, skin and other senses, the network is the nervous system used to transmit information, embedded systems is the human brain, after receiving the information to be classified deal with. This example is very vivid description of the sensor, embedded systems in the Internet of Things position and role. Five, cloud computing Cloud computing is the product of bringing together some of the relevant networking technologies and computers. It is using distributed computing computer information and operating data center into similar with the Internet, so that resources can be applied to useful technologies, the storage system and the computer to do the necessary advice. The aim is to cost-effectively handle various types of consumption and integrate them into full-fledged entities. MSP, SAAS and other modes can also be used to distribute and calculate to end-users. Cloud computing is focused on improving its processing power, reducing the burden on the user terminal, simplifying I / O devices, and making reasonable use of its computing capabilities. For example, Baidu search function is one of its applications.
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