Research on Intelligent Technology of Industrial Field Instruments

Abstract: The research information of intelligent technology of industrial field instruments is provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Industrial process automation is achieved through the organic combination of automated instruments, automation technology, production processes and equipment. Therefore, industrial automation instruments and systems are the most important category in the instrumentation industry. At present, the international automation instruments and systems. For more flowmeter manufacturers to select models and price quotations, you are welcome to inquire. The following is the details of the research articles on the intelligent technology of industrial field instruments. Industrial process automation is achieved through the organic combination of automated instruments, automation technology, production processes and equipment. Therefore, industrial automation instruments and systems are the most important category in the instrumentation industry. At present, the international automation instrument and system is undergoing a new“change”, that is, the intelligence, digitization, networking and openness of the instrument. 1. The strategy and status quo of the intelligentization of industrial automation instruments in my country. Instrument intelligence refers to the use of ultra-large-scale integrated circuits and microprocessor technology, and the use of embedded software to coordinate internal operations, so that the instrument has intelligent functions. Based on the compensation of temperature and pressure, the conversion of range scale and scale, zero point error, fault diagnosis, etc., it can also complete the control of the industrial process, so that the functions of the control system are further dispersed. These products appear in the form of digital display, which not only greatly improves the performance of the instrument, but also facilitates information communication, and can form a new process control system through the network. Therefore, the intelligence and digitization of the instrument calls for a new control system, and the emerging fieldbus technology adopts the computer digital communication technology, so that the automatic control system and the field equipment join the factory information network and become the bottom layer of the enterprise information network, which can make the intelligent instrument play the role of On the other hand, the intelligent and bus-based field instrument is the key to whether the field bus technology can be truly realized in the field of industrial process control. In the early 1990s, the instrument industry organized the joint development of DDZ-S series instruments to solve the digitalization problem of control instruments. At the same time, relevant domestic instrument factories have introduced new technologies such as single-loop regulators, capacitive and diffused silicon transmitters, DCS, and executive structures, and have carried out localization work.“Ninety-five”During this period, following the international trend, fieldbus intelligent instruments and systems have become a hotspot of development. The development of HART intelligent instrument was successful; the key technology breakthrough of FF intelligent instrument; the development and application of Lon intelligent network products developed rapidly; the application of CAN bus and Profibus bus products has achieved results. Standard development of fieldbus smart instruments accompanies“Ninety-five”The research was carried out at the same time, and a number of standards have been completed. The development of field bus intelligent instrument and automation network system in China has a good start.“fifteen”The goal of technology and product structure adjustment is: the technology level of fieldbus-based products reaches the advanced foreign level in the 1990s, and the sales account for 30% of the domestic instrument sales. Facing the market, promote the digitalization, intelligence and networking of instruments and systems. . 2. The intelligence of the instrument The intelligence of the process instrument begins with the controller. Programmable single-loop regulators are representative of this type of smart instrument, such as Yamatake-Honeywell's SSC series KMM (recently SDC40B); Yokogawa's YS-80 series (recently YS170) SLPC, etc. The programmable single-loop regulator is based on the microprocessor as the core of the arithmetic controller. It mainly receives and outputs standard and continuous electrical and analog signals, and can be programmed by the user to form various digital process control devices. It integrates various functions such as loop control, digital operation, logic operation and communication, and can realize different functions by programming. Field devices in process control system automation are often referred to as“Field instrument”. Field instruments mainly include transmitters, actuators, online analysis instruments and other testing instruments. Compared with the rapid changes of the main control instrument/system, the field instrument is relatively lagging behind and has little change. But when the field bus technology appears, the field instrument intelligence and the bus line are especially urgent. Therefore, in order to make their own fieldbus control system (FCS) can be applied, various fieldbus control system manufacturers have launched measuring instruments and regulating valves with fieldbus function supporting their control systems to form a complete fieldbus control system. 3. The intelligence and bus line of the field instrument First, the intelligent transmitter is used to illustrate the intelligent process of the field instrument. The smart transmitter integrates all the functions and some control functions of the smart instrument, and has high linearity and low temperature drift, which reduces the complexity of the system and simplifies the system structure. The smart transmitter has certain artificial intelligence, which can realize self-learning function, etc.; it can be integrated into a transmitter with multiple sensitive components, which can measure various physical and chemical quantities at the same time, and comprehensively reflect the comprehensive information of the measured; high precision, measurement Wide range, its range ratio can be up to 400:1, can cope with a wide measurement range, especially suitable for occasions requiring a large range ratio; standardized communication interfaces can be used for information exchange, which is one of the key signs of intelligent transmission. one.

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