What is the Internet of things?
The original concept of the Internet of things was put forward by the United States. It is a network concept that connects all articles through the Internet of things domain name, carries out information exchange and communication, and realizes intelligent identification, positioning, tracking and so on.Of course, the official definition of the Internet of Things is: it is based on the Internet, which enables non-communicative objects to communicate with each other, and the resulting process is called Internet of Things.
Principles of the Internet of things
The Internet of Things (iot) is a "Internet of Things" covering everything in the world based on the Internet of computers, using RFID, wireless data communication and other technologies.In this network, goods can "communicate" with each other without human intervention.Its essence is the use of radio frequency automatic identification (RFID) technology, through the computer Internet to achieve the automatic identification of goods (goods) and information interconnection and sharing.
The concept of "Internet of things" has broken the traditional thinking.The idea has been to separate physical infrastructure from IT infrastructure: airports, roads, buildings on the one hand, data centres, personal computers, broadband and so on on the other.In the era of "Internet of things", reinforced concrete and cables will be integrated with chips and broadband into a unified infrastructure. In this sense, infrastructure is more like a new earth construction site on which the world is running, including economic management, production operation, social management and even personal life.
Principles of the Internet of things
The Internet of Things (iot) is a "Internet of Things" covering everything in the world based on the Internet of computers, using RFID, wireless data communication and other technologies.In this network, goods can "communicate" with each other without human intervention.Its essence is the use of radio frequency automatic identification (RFID) technology, through the computer Internet to achieve the automatic identification of goods (goods) and information interconnection and sharing.
The concept of "Internet of things" has broken the traditional thinking.The idea has been to separate physical infrastructure from IT infrastructure: airports, roads, buildings on the one hand, data centres, personal computers, broadband and so on on the other.In the era of "Internet of things", reinforced concrete and cables will be integrated with chips and broadband into a unified infrastructure. In this sense, infrastructure is more like a new earth construction site on which the world is running, including economic management, production operation, social management and even personal life.

联网的特征

First, comprehensive perception, that is, the use of RFID, sensors, two-dimensional code and other objects at any time and anywhere to obtain information;

Second, reliable transmission, through a variety of telecommunications networks and the integration of the Internet, the object of real-time information accurately transmitted;

Third, intelligent processing, the use of cloud computing, fuzzy recognition and other intelligent computing technology, the analysis and processing of massive data and information, the implementation of intelligent control of objects.

The application field of the Internet of things

Iot application widely, involves the intelligent transportation, environmental protection, government, public security, and peace, household, intelligent fire control, industrial monitoring, environmental monitoring, street lighting control, landscape lighting control lighting control, building lighting control, square, the old man care, personal health, floriculture, drainage monitoring, food traceability and the situation of the enemy reconnaissance and intelligence, and other fields.

The three main elements of sensor network: sensor, perceived object and observer

Key technologies and characteristics of sensor networks

Key technologies of WSN: network topology control, network protocol, network security, time synchronization, positioning technology, data fusion, data management, wireless communication technology, embedded operating system, application layer technology.

Features: large-scale networks, self-organizing networks, dynamic networks, reliability networks, application-related networks, data-centric networks.

Main applications of sensor networks

Military applications, environmental observation and prediction systems, medical care, smart homes, building condition monitoring, and other applications (e.g., space exploration, smart dust, etc.).

The difference between sensor networks and the Internet of things

1. In a broad sense

The components of the Internet of things and the sensor network are basically the same, which are different expressions of the same thing. The Internet of things is closer to the essential attributes of "things" than the sensor network. It emphasizes that information technology and equipment provide higher-level application services for "things".Sensor network (sensor network) is an objective description from the perspective of technology and equipment, and the elements of equipment and technology are obvious.

For example, the sensor network is a scientific name, the Internet of things is a common name;Or the sensor network is daimyo, the Internet of things is a nickname.

2. From the perspective of industry and users

Its called the Internet of things: from a technology support perspective, its called a sensor network.The Internet of things and the sensor network are the same thing, the essence of which is the sensor network of perception.