What Is Computer Surveillance?

Computer monitoring system is the computer monitoring control system, which refers to the computer system with data, monitoring, and control functions. It has the characteristics of real-time, reliability, maintainability, management functions, and automatic control. Is widely used in post and telecommunications, steel, aerospace and other major fields.

Since the United States first studied computer monitoring systems for military test projects in 1956, it has experienced the development of centralized monitoring systems, microcomputer monitoring systems, hierarchical decentralized monitoring systems, and open SCADA systems.

The current computer monitoring system refers to a computer system with data, monitoring, and control functions. Among these products, the more typical and representative is the monitoring and data acquisition system, which is often called the SCADA (Supervisory Control and Data Acquisition) system. The development process of SCADA system is closely related to the development process of data communication and network, which can be roughly summarized as:

Before the 1970s, it was the first generation of centralized monitoring system. From the perspective of the development of the network, this period was called the first step of the network, that is, the remote online system stage;

From the mid-70s to the mid-1980s, it was the second-generation microcomputer monitoring system, and its basic structure was centralized;

From the mid-1980s to the present, it is the third-generation hierarchical decentralized monitoring system (DCS and

Computer monitoring systems have evolved from the direct monitoring and control of a single computer to a multi-pole computer detection and control system, as well as the development of distributed, networked, intelligent, five-time secret systems; however, the development of computer monitoring technology has evolved with sensors, computers, The development of communication and network technology has developed. Any new breakthrough in any of these technologies will inevitably bring about the progress and reform of the monitoring system.

Sensor Technology

The monitoring system relies on sensors, professional cameras and other equipment to detect information. The more information is detected, the greater the scope and role of the monitoring; the processing of information uses conventional filtering and denoising, and the control is based on PID. algorithm. In the future, sensors will continue to develop towards integrated, multi-functional intelligent sensors. Intelligent instrumentation and intelligent controllers can facilitate networking and facilitate the formation of an open SCADA system.

Network Transmission Media Technology

The monitoring system transmits information through the transmission medium. The faster the information transmitted by the transmission medium, the more sensitive the monitoring system response is, and the more information is transmitted. Transmission media from twisted pair, coaxial cable, optical cable to signals (microwave, infrared) and satellite communications in the field of vision, from wired to wireless development, also promoted the development of monitoring systems.

Open comprehensive network monitoring management system

After the 1990s, the network technology developed to the fourth stage, namely the network computer and the information highway network stage. The computer network system itself is an extremely large and complex integrated network system, which itself needs an integrated network monitoring management system. The fourth-generation integrated network monitoring system includes a wide range of environmental image monitoring systems, equipment monitoring systems, and commercial financial service monitoring systems. This new generation of integrated network monitoring system can be composed of several monitoring systems, they can be connected to a bus network, ring network or star network, and the network nodes can be increased or decreased, or it can be a single large monitoring system .

Computer monitoring system integration

The level of application of computer systems has been continuously improved. With the development of computer hardware, software and network, database and other technologies, a new concept is gradually being accepted and recognized by people. This is computer system integration. Computer system integration is a combination of hardware, network, database, and related application software into an effective, usable, and cost-effective computer application system based on application requirements.

Wireless integrated monitoring system

CDPD-based wireless Internet access, mobile office, mobile stock trading, wireless credit card payment, wireless reporter station, remote environmental monitoring and other transportation and road engineering applications. A wireless integrated monitoring system and temperature control device are being formed. The system uses wireless transmission, sound and light alarm, central control, and automatic management. ^[1]

Computer monitoring systems are widely used in post and telecommunications, steel, chemical, environmental protection, national defense, aerospace, industrial water treatment, industrial and mining industries, commerce, economic and financial institutions, flood prevention and disaster relief, government agencies and education and health, residential, residential and other major areas, almost all The industry has adopted various measurement, control and monitoring equipment to varying degrees. Some monitoring system technologies are quite advanced and the equipment is very complete. Computer systems have penetrated into all areas of political and economic activity in each country, and even managed the affairs of the country, detecting certain parameters and phenomena across the country. Such as: the application of computer monitoring system in power system, transportation industry and so on.