Analysis of Basic Status of Automatic Instrument and Control System

In the 21st century, the rapid development of China's manufacturing industry has stimulated the demand for automated instrumentation and control systems. The advanced level of automated instrumentation and control systems used in large-scale projects in China is already at the leading level in the world. At present, the traditional manufacturing industry has passed a period of glory in developed countries, and its associated automation instruments have naturally grown slowly. The development of automated instrumentation The price issue in emerging markets affects instrument manufacturers from two perspectives. First, users in emerging markets are highly sensitive to product prices; second, they often find very cheap alternatives. Inspiring multinational companies to spend a lot of money on the development of new instruments.

In the past 10 years, the development of fieldbus technology, an important field in the development of automated instrumentation technology, has achieved remarkable results. However, it is still largely in the stage of replacing analog transmission lines. In fact, the fieldbus is not only the change of the signal system, but also provides the basis for the informatization of the control technology. The user's demand for the transformation of the system's underlying information (control, diagnosis, and management) is the original driving force for fieldbus technology promotion. In recent years, the potential of fieldbus in equipment asset management, predictive diagnosis and smooth operation has begun to be excavated, showing a very promising development momentum.

However, based on the fieldbus technology networked control and distributed intelligent technology only, no significant breakthrough has occurred in theory or in practice at present. The speed bottleneck of fieldbus is sometimes not as good as the complex control and rapid response. Traditional instrumentation: The fieldbus battle that lasted for many years has not won a winner among manufacturers. It has also made users feel bored and consumed resources of various companies.

Internationally, several important windows reflecting the trends of automated instrument products: international instrument exhibitions represented by ISAEXPO, Miconix, etc., represented by Readers' Choice Award. According to the reader selection award in the past three years, the award-winning products have not changed much. The focus of this year's development of automation instruments is on the application of meters.

This change in the development trend is very natural, and the digitized and intelligent instruments and systems have been told to develop in the past 10 years and have accumulated some problems in the application. Many innovative functions of smart meter design have not been fully applied. The main issues are the following.

(1) Information confidentiality and security issues of digital instruments and systems (2) Reproducibility of microprograms and software.

(3) Confidentiality, security and reproducibility of communications.

(4) When the smart meter is running, it can interact with the control system and how to interact.

(5) Smart meters provide much more information than analog meters and how to make full use of this information.

(6) Interoperability issues of many smart meters.

(7) Fault diagnosis of instruments and systems and interoperability issues of fault diagnosis information.

The above problems are all caused by digitization and networking. It is not that the existing technologies cannot solve these problems, but there are too many alternative solutions, and a unified solution is the most effective. And how to unify is currently being studied.