The Internet of Things (IoT, Internet of things), or "Internet of everything connected", is an extension and expansion of the network based on the Internet, combining a variety of information sensing devices with the Internet and the formation of a huge network, to realize the interconnectivity of people, machines, and things, at any time and any place. of people, machines and things at any time and any place.
1, radio frequency identification technology
Radio Frequency Identification (Radio Frequency Identification, referred to as RFID). RFID is a simple wireless system, by an interrogator (or reader) and a lot of transponders (or tags). The tag consists of a coupling element and a chip, and each tag has an electronic code that is the only extended word.
The tag is attached to the object to identify the target object, it through the antenna will pass the radio frequency information to the reader, the reader is to read the information of the device.RFID technology allows the object can "speak". This gives the Internet of Things a characteristic that can be tracked. That is to say, people can always grasp the exact location of the item and its surrounding environment.
2, sensor network
MEMS is micro-electromechanical systems (Micro - Electro - Mechanical Systems) of the English acronym. It is an integrated micro device system consisting of micro sensors, micro actuators, signal processing and control circuits, communication interfaces and power supply components.
The goal is to integrate the acquisition, processing and execution of information together to form a multi-functional micro-systems, integrated into large-size systems, thereby significantly improving the automation, intelligence and reliability of the system.
3, M2M system framework
M2M is the abbreviation of Machine-to-Machine/Man, which is a kind of intelligent interaction with machine terminal as the core, networked applications and services. It will enable intelligent control of objects.M2M technology involves five important technical components: machines, M2M hardware, communication networks, middleware, and applications.
Based on the cloud computing platform and intelligent network, it can make decisions based on the data obtained from the sensor network and change the behavior of the object for control and feedback.
4. Cloud Computing
Cloud computing aims to integrate multiple relatively low-cost computing entities into a perfect system with powerful computing capabilities through a network, and to make these powerful computing services available to end users with the help of advanced business models.
If we compare computing power to power generation, the shift from the old stand-alone power generation model to the modern centralized power plant model is similar to the shift from the stand-alone computing model to the cloud computing model, where the "cloud" is like a power plant, with powerful computing power that is not available in a stand-alone machine.
Expanded information:
Internet of Things
1, the function of obtaining information
Mainly the perception of information, recognition, and the use of information. Mainly information perception, identification, information perception refers to the state of the attributes of things and their changes in the way of perception and sensitivity; information recognition refers to the ability to feel the state of things expressed in a certain way.
2, the function of transmitting information
Mainly information sending, transmitting, receiving and so on, and finally the task of transmitting the acquired information about the state of things and the way they change from one point in time (or space) to the other, which is often said to be the communication process.
3, the function of processing information
It is the process of processing information, the use of existing information or perceived information to produce new information, actually the process of making decisions.
4, the function of the application of information
refers to the process in which the information finally plays a useful role, there are many forms of expression, the more important is to adjust the state of the object thing and its transformation, always make the object in the pre-designed state
Baidu Encyclopedia - Internet of Things