Definition of Internet of Things

Internetofthings (IoT) is "the Internet of Everything", which is an extension and expansion network based on the Internet. It combines all kinds of information sensing devices with the network to form a huge network, which realizes the interconnection of people, machines and things at any time and any place.

The Internet of Things is an important part of the new generation of information technology, and the IT industry is also called pan-interconnection, that is, things are connected and everything is connected. It can be seen that "the Internet of Things is the Internet connected with things".

This has two meanings: first, the core and foundation of the Internet of Things is still the Internet, which is an extension and expansion network based on the Internet; Second, its client extends to any item and exchanges information and communication between items.

Therefore, the definition of the Internet of Things is a network that connects any article with the Internet according to the agreed protocol through information sensing devices such as radio frequency identification, infrared sensor, global positioning system and laser scanner, and exchanges and communicates information, so as to realize intelligent identification, positioning, tracking, monitoring and management of articles.

Characteristics of Internet of Things

The basic characteristics of the Internet of Things From the communication object and process, the information interaction between things is the core of the Internet of Things. The basic characteristics of the Internet of Things can be summarized as holistic perception, reliable transmission and intelligent processing.

Overall perception-you can use RFID, QR code, smart sensors and other sensing devices to perceive and obtain various information of objects.

Reliable transmission-Through the integration of Internet and wireless network, the information of the object can be transmitted in real time and accurately for information exchange and sharing.

Intelligent processing-analyzing and processing the sensed and transmitted data and information by using various intelligent technologies to realize the intelligence of monitoring and control. According to the above characteristics of the Internet of Things, combined with the viewpoint of information science, around the process of information flow, we can summarize the functions of the Internet of Things in processing information:

(1) The function of obtaining information. It is mainly the perception and recognition of information, and the perception of information refers to the perception and sensitivity of the attribute state of things and their changing ways; Information recognition refers to the ability to express the state of things in some way.

(2) the function of transmitting information. It is mainly the task of sending, transmitting and receiving information, and finally transferring the obtained state information of things and its changing mode from one time point (or space) to another time point (or space), which is usually called communication process.

(3) Information processing function. It refers to the process of information processing, using existing information or perceived information to generate new information, which is actually a decision-making process.

(4) Efficacy information function. It refers to the process in which information finally plays a role, and there are many forms of expression. It is more important to keep the object in the pre-designed state by adjusting the state of the object and its transformation mode.