1. Overview
     The Internet of Things is a network based on the Internet, traditional telecommunication networks and other information carriers, so that all ordinary physical objects that can be addressed independently can be interconnected. It has the important characteristics of common object deviceization, autonomous terminal interconnection, and ubiquitous service intelligence. Perception and recognition layer, network construction layer, management service layer, and comprehensive application layer. Features: pervasive perception and recognition, interconnection of heterogeneous equipment, large-scale networking terminals, intelligent management and control, chain of application services, and leapfrogging economic development.

    The industrial Internet of Things is to continuously integrate all kinds of acquisition or control sensors or controllers with perception and monitoring capabilities, as well as ubiquitous technology, mobile communication, intelligent analysis and other technologies into all aspects of the industrial production process, so as to greatly improve manufacturing efficiency, improve product quality, reduce product cost and resource consumption, and finally realize the upgrading of traditional industry to a new stage of intelligence. In terms of application form, the application of industrial Internet of Things has the characteristics of real-time, automation, embedded (software), security, and information interconnection.

2.Key technologies for the Industrial Internet of Things

2.1 Sensor technology
    Inexpensive, high-performing sensors are the cornerstone of IIoT applications, and the evolution of IIoT requires more accurate, smarter, more efficient, and more compatible sensor technologies.
2.2 Device Compatible Technology
    The compatibility of sensors mainly refers to the compatibility of data formats and communication protocols, and the key to compatibility is the unification of standards.
2.3 Network Technology
    Networks are one of the cores of the Industrial Internet of Things, where data is transmitted between different layers of the system.
2.4 Information Processing Technology
    The explosive growth of industrial information, the large amount of data generated in the industrial production process is a challenge for the industrial Internet of Things, how to effectively process, analyze, record these data, and extract the results of guiding suggestions for industrial production is the core of the industrial Internet of Things, but also the difficulty.
2.5 Security Technology
    Industrial Internet of Things security mainly involves data collection security, network transmission security and other processes, information security plays a key role in enterprise operations, such as metallurgy, coal, petroleum and other industries need to collect data for a long time of continuous operation, how to ensure the accuracy of information in the process of data collection and transmission is the premise of industrial Internet of Things applied to actual production.

3. Application fields of industrial Internet of Things
3.1 Manufacturing supply chain management
    Enterprises can use the Internet of Things technology to grasp the raw material procurement, inventory, sales and other information in a timely manner, and through big data analysis, they can also predict the price trend of raw materials, supply and demand, etc., which will help improve and optimize the supply chain management system, improve the efficiency of the supply chain and reduce costs.
3.2 Monitoring and management of production equipment
    The use of sensing technology to monitor the health of production equipment can track the use of various industrial machinery and equipment in the production process in a timely manner, and gather the data to the data analysis center of the equipment manufacturer through the network for processing, which can effectively diagnose and predict machine faults, quickly and accurately locate the cause of failures, improve maintenance efficiency and reduce maintenance costs.
3.3 Environmental monitoring and energy management
    The integration of industrial Internet of Things and environmental protection equipment can realize real-time monitoring of various pollution sources and key indicators of pollution control in the industrial production process. The deployment of sensor networks in chemical, light industry, thermal power plants and other enterprises can not only monitor the pollution data of enterprises in real time, but also detect abnormal pollution discharge and stop the corresponding production process in time through intelligent data alarms, so as to prevent sudden environmental pollution accidents.
3.4 Industrial production safety management
    "Safe production" is the top priority in modern industry. By installing sensors in dangerous operating environments such as mining equipment, oil and gas pipelines, and miners' equipment, the industrial Internet of Things technology can monitor the safety status information of operators, equipment and machines and the surrounding environment in real time, obtain the safety elements in the production environment in an all-round way, and upgrade the existing network supervision platform into a systematic, open and diversified comprehensive network supervision platform, which effectively guarantees the safety of industrial production.