Application of Single Chip Microcomputer in Flowmeter Compensation of Saturated Steam

Abstract: The application of single-chip microcomputer in the compensation of the flow meter of saturated steam The information is provided by the excellent flow meter and flow meter manufacturers and quotation manufacturers. Abstract: This study is aimed at this situation, using MCS-51 single chip, taking the boiler saturated steam flow as the object, to carry out the density compensation of flow measurement. In this study, based on the traditional fluid metering compensation idea, the temperature change value and the density change value are calculated. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the application of single-chip microcomputer in the measurement and compensation of saturated steam flowmeter. This study is aimed at this situation, using MCS-51 microcontroller, taking the boiler saturated steam flow as the object, to carry out the density compensation of flow measurement. In this study, based on the traditional fluid metering compensation idea, curve fitting is performed between the temperature change value and the density change value, and a single mathematical model is used for the traditional flowmeter compensation method, so that when the operating conditions change in a large range, the compensated flowmeter The accuracy of the flow rate can not meet the requirements, a method of flow compensation by piecewise fitting is proposed. And the idea of ​​smart meter is introduced into compensation technology, using MCS-51 single-chip microcomputer for data processing, using the strong storage capacity and fast computing power of single-chip microcomputer, not only improves the accuracy of compensation, but also reduces the cost of the compensation device, which is simple, flexible, and convenient. master. At the same time, the coefficient of the fitting curve is read in the form of a look-up table in the programming of the program, so that when the coefficient is changed or used for other similar compensation applications, only the corresponding value in the table needs to be changed without the need for major changes in the program. Change, more flexible and has a certain generality. Introduction The detection and control of fluid flow is an important basis for all walks of life to strengthen energy and material management, economic analysis, settlement and decision-making. It is also an important means to monitor the production process to maintain quality, safety, improve efficiency and improve the environment. Although there are dozens of current flow meters, compensation measures are often used for higher and higher measurement accuracy. If a differential pressure flowmeter is used to detect the flow of saturated steam, the design pressure is 0.5MPa. When the steam pressure changes to 1.0MPa, the flow error is about -26%. The greater the variation of the working conditions, the greater the error introduced. Therefore, compensation measures must be adopted in some occasions where precise measurement is required or the working condition fluctuates widely and frequently. Fluid metering compensation technology is a correction method established for different flow meters to detect different fluids. With the advancement of automation technology and the emergence of computers and other intelligent devices, the technical tools for automatic compensation have become more and more perfect, but the process of establishing the mathematical model of fluid metering compensation is not fully considered, and the accuracy of metering is still not high. 1. Flow measurement of saturated steam and its compensation Differential pressure flowmeter is the main instrument for measuring saturated steam at present. Its scale equation is as follows: In the formula: M——Mass flow of saturated steam, kg/h;α0——Flow coefficient determined according to design conditions; ε——Gas expansion coefficient determined according to design conditions;γRe——The correction coefficient of the inner wall roughness of the pipe determined according to the design conditions; d——Diameter of orifice plate at design temperature, mm; Δp——Differential pressure before and after the orifice plate, Pa;ρs——Density of saturated steam under design conditions, kg/m3. After the flowmeter is installed,α0, ε andγRe and d are fixed values. When the operating conditions (pressure or temperature) of the steam change, let the steam density at this time beρ, if the differential pressure before and after the orifice remains unchanged, it is still Δp, and the flow becomes M. Formula (1) and (2) are simultaneously combined, then formula (3) is based on the density parameter to compensate the flow, and the steam flow is calculated. Density compensation must detect the density of saturated steam at any time. At present, there is no stereotyped density meter for detecting saturated density. In engineering, the characteristics of the one-to-one correspondence between the saturated steam density and the absolute pressure of the steam or the working temperature of the steam are used to pass the pressure or temperature. The parameter indirectly corrects the indication value of the flowmeter. 2. Calculation formulas for thermodynamic properties of saturated steam commonly used in engineering In order to meet the development needs of automatic compensation technology, it is necessary to formulate the thermodynamic properties of steam. The following are the calculation formulas for thermodynamic properties of saturated steam commonly used in engineering.

Beijing Sincerity Automatic Equipment Co., Ltd is considered as one of the leading supplier of mass flow meter products in China.

If you follow these straightforward steps you can keep your rosemount coriolis mass flow meter low flow turbine flow meter. I think this article will help you make a wise decision on choosing the right .

The best way to determine the ideal strategy of mass flow meter is to continually test and refine your selling and marketing tactics.

Deeper connections between Beijing Sincerity Automatic Equipment Co., Ltd and customers can be made when we're thinking out of the box and meeting outside of manufacturing work.