- What is the Internet of Things?
The Internet of Things is the English abbreviation “Internet of things (IoT)”, as the name suggests, the Internet of Things is the Internet connected by objects. . The definition of the Internet of Things is through the use of information sensing devices such as radio frequency identification (RFID), infrared sensors, global positioning systems, laser scanners, etc., to connect any item with the Internet according to the agreed protocol, to exchange information and communication. A network that intelligently identifies, locates, tracks, monitors, and manages items.
Simply put, the Internet of Things is a ubiquitous network built on the Internet. The important foundation and core of the Internet of Things technology is still the Internet. Through the integration of various wired and wireless networks with the Internet, the information of objects can be accurately transmitted in real time. Everything in the world, from watches and keys, to cars and buildings, as long as a miniature sensor chip is embedded and made intelligent, this object can “speak automatically.” With the help of wireless network technology, people can “talk” to objects, and objects and objects can also “communicate”. This is the Internet of Things.
The Internet of Things not only provides sensor connectivity, but also has the ability to intelligently handle intelligent control of objects. The Internet of Things combines sensors and intelligent processing to expand its application areas with various intelligent technologies such as cloud computing and pattern recognition. Analyze, process and process meaningful data from the vast amount of information obtained by sensors to adapt to the different needs of different users and discover new application areas and application models.
Internet of Things
Second, the three levels of the Internet of Things architecture
The Internet of Things, as a system network, has the same internal architecture as other networks. The system architecture of the Internet of Things is divided into three levels.
One is the sensing layer, that is, using RFID, sensors, two-dimensional codes, etc. to obtain information of objects anytime and anywhere;
Second: the network layer, through the integration of various telecommunication networks and the Internet, the information of the object is accurately transmitted in real time;
Third: the application layer processes the information obtained by the sensing layer to realize practical applications such as intelligent identification, positioning, tracking, monitoring and management.
In short, the concept of the Internet of Things is a network concept that extends and extends its client-side to any item and any item on the basis of the Internet concept for information exchange and communication.
Third, the four key core technologies of the Internet of Things
1) RFID radio frequency identification technology
RFID radio frequency identification technology is composed of the following aspects. First, it is an object with identification on a certain thing, which is an RFID electronic tag. Second, an RFID reader/writer, reading or writing is attached to an electronic tag. The information on the information can be static or dynamic. Third, the RFID antenna is used to transmit signals between the reader and the tag. Corresponding hardware and software matching is required in life applications.
RFID radio frequency identification technology uses superior conditions to encourage humans to manage and automatically identify things and facilities in a static or dynamic state. The difficult question involved in the development of this technology is how to choose the best working frequency and confidentiality protection.
2) Sensor technology
Valuable information requires not only radio frequency identification but also sensing technology. The Internet of Things is often in the natural environment, and sensors are subject to harsh environments. Therefore, the requirements for sensor technology will be more stringent and more demanding.
Sensors can collect large amounts of information and are a must-have for many equipment and information systems. If no sensor detects, alters, and captures the original information, all control and testing cannot be achieved. Even the most advanced computers, without information and reliable data, can’t effectively use the sensor itself. There are three aspects to the breakthrough and development of sensor technology: network, sensory information, and intelligence.
3) Network communication technology
Network communication technology contains many important technologies, among which M2M technology is the most critical. The technology is widely used, not only with long distance, but also with close-range technology. Today’s M2M technology is centered on machine-to-machine communication. For architecture, aerospace, medicine, agriculture and other industries, professionals will strive to achieve this in the future.
4) Cloud computing
Cloud computing is the product of merging some related network technologies and computers. It uses the information calculated by distributed computers and the operational data center to be similar to the Internet, enabling resources to be applied to useful technologies and making necessary consultations on storage systems and computers. The purpose is to low-cost processing and integration of various consumption into a fully functional entity, and can also use MSP, SAAS and other modes to distribute and calculate to end users. Cloud computing is focused on strengthening and improving its processing capabilities, and the burden on user terminals is correspondingly reduced. I/O devices can also be simplified, and their computing functions can be reasonably enjoyed and utilized. Search functions such as Baidu are one of its applications.