Now that you are reading this article, in what way are you reading this article? Is it through a mobile phone? Or through the computer? Or a tablet? No matter what device you are using, it is connected to the Internet.
The emergence of the Internet is a very beautiful thing, it has provided us with various conveniences that were impossible before.
Connecting devices to the Internet has produced many amazing benefits. Through the use of smartphones, laptops and tablets, we feel these benefits, but in fact, this is true for all other devices. Yes, I'm talking about everything. The Internet of Things is actually a very simple concept, which means connecting everything in the world to the Internet.
The concept of the Internet of Things confuses everyone not because the concept is too narrow, but because it is too broad. When the Internet of Things has so many application examples and possibilities, it is difficult to form a clear definition of the Internet of Things in your mind.
From smart lights to shared bicycles, from smart manhole covers to smart agriculture, the industry span of the Internet of Things is very large. It is no exaggeration to say that all industries are related to the Internet of Things.
Principles of Internet of Things TechnologyThe principle of the Internet of Things technology is actually based on the computer Internet, using RFID, wireless data communication and other technologies to construct an "Internet of Things" covering tens of thousands of buildings in the world. In this network, buildings (objects) can "communicate" with each other without human intervention. Its essence is to use radio frequency automatic identification (RFID) technology to realize the automatic identification of items (commodities) and the interconnection and sharing of information through the computer Internet.
The core technology of the Internet of Things is still in the cloud, and cloud computing is the core technology for realizing the Internet of Things. The three key technologies and fields of the Internet of Things include key technologies: sensor technology, RFID tags, and embedded system technology. Fields: public affairs management (energy conservation and environmental protection, traffic management, etc.), public social services (medical and health, home construction, financial insurance, etc.), economic development and construction (energy and power, logistics and retail, etc.).
Sensor technology is a key technology in computer applications, which converts the analog signal in the transmission line into a processable digital signal, which is handed over to the computer for processing.
RFID, the full name of Radio Frequency IdentificaTIon, is radio frequency identification technology. It is a comprehensive technology that integrates radio frequency technology and embedded technology. It will be widely used in automatic identification and item logistics management in the near future.
Embedded system technology is a complex technology that integrates computer software, computer hardware, sensor technology, integrated circuit technology, and electronic application technology.
Decentralized usage scenarios and centralized technologyThe usage scenarios of the Internet of Things are very consistent in summary: collection + transmission + calculation + display
The IoT terminal collects data, transmits the data to the server, the server stores and processes the data, and displays the data to the user.
For example, when sharing a bicycle, the positive process is: the bicycle obtains GPS location data, reports it to the server through the 2G network, the server records the bicycle location information, and the user checks the bicycle location on the APP. The reverse process is: the user sends an unlock request to the server, the server issues the unlock command to the bicycle through the 2G network, and the bicycle executes the unlock command.
Large and small IoT applications are implemented based on the two processes of forward data collection and reverse command control.
Choice of transmission methodFor the Internet of Things, there are these ways to connect:
Low power consumption and close range, using BLE or Zigbee.
Low power consumption and long distance, use NB-IOT or 2G
Big data close range, use WIFI
Big data long-distance, using 4G network
In terms of network layout, the long-distance network is directly connected to the base station, and there is no need to set up network nodes by yourself. However, a short-distance network needs a network node, which first transmits terminal data to the node, and then the node connects to the wide area network.
Long-distance transmission is more expensive and consumes more power than short-distance transmission. Reasonable use of distance and proximity can effectively reduce the cost of IoT terminals.
For example, the original shared bicycles are unlocked using the 2G network and must maintain a long data connection or use downlink SMS to unlock, which is high in power consumption and costly. However, the downloaded shared bicycles abandoned remote unlocking and directly used the Bluetooth of the mobile phone to unlock the bicycle, saving data traffic. , Reduce power consumption, but also increase the speed of unlocking; Yingenergy electric bicycle intelligent charging station is also a high-tech product of the Internet of Things, using the latest narrowband communication technology, leading the technological height of electric bicycle charging equipment.
Cloud service designThe design of the cloud server and APP of the Internet of Things is basically the same as that of the Internet. JAVA, PHP, and ASP can all be used for the background processing of the Internet of Things.
The mobile Internet is a structure of "people-servers-humans", and the Internet of Things is a structure of "things-servers-humans". The two are essentially the same. Internet of Things terminal devices also use the Internet such as TCP, HTTP, and MQTT. The protocol connects to the server.
The slightly different is NB-IOT, which is based on the architecture of "things-base stations-servers-people". NB-IOT IoT terminals only need to connect to the base station to receive downlink messages without maintaining long connections. , Can save a lot of power consumption.
to sum upInternet of Things = Things + Internet
Object = Processor + Sensor + Actuator
Networking = data transmission + server + client
The Internet of Things is actually that simple.
Dongguan Guancheng Precision Plastic Manufacturing Co., Ltd. , https://www.dpowerchargers.com