Intelligent magnetic vortex flow detection control system

Abstract

The invention belongs to the field of flow measurement systems, and in particular relates to an intelligent magnetic vortex flow detection control system. The system comprises a meter-reading terminal (5) provided with a flow measurement gauge, a GSM / GPRS network and a detection control center, wherein a gauge body (1) of the flow measurement gauge is fixedly provided with a vortex generating body (2) in which a magnetic vortex flow probe (3) is fixedly arranged; an electromagnetic flow probe (4) is also arranged in the measurement gauge body (1); output ports of the magnetic vortex flow probe (3) and the electromagnetic flow probe (4) are connected with interfaces of the flow measurement gauge in the meter-reading terminal (5); the meter-reading terminal comprises the flow measurement gauge and a meter-reading terminal GSM / GPRS network modem; ports of the flow measurement gauge are connected with the ports of the meter-reading terminal GSM / GPRS network modem; and the ports of the meter-reading terminal GSM / GPRS network modem are connected to a detection-control-end GSM / GPRS network modem via the GSM / GPRS network.

Description

technical field [0001] The invention belongs to the field of flow metering systems, in particular to an intelligent magnetic eddy flow detection and control system. Background technique [0002] The magnetic vortex flowmeter is an instrument that uses the Ferrari excitation principle to measure the vortex shedding frequency of the Karman vortex street and then accurately measure the flow. The magnetic vortex flow detection device adds intelligent control on the basis of pure measurement, especially for real-time monitoring of the working status of the flowmeter itself. The real-time analysis of the confidence of the metering data is an improvement in the application theory of the flowmeter in the technical concept. The Karman vortex flowmeter is designed based on the idea that the stable Karman vortex value and vortex shedding frequency are proportional to the fluid velocity within a certain range of Reynolds number Re. The electromagnetic flowmeter is designed based on the...

AI Technical Summary

Problems solved by technology

If the electromagnetic flowmeter converter does not consider the fluid density, it is not appropriate to only give the volume flow rate at room temperature

[0006] (3) The installation and commissioning of electromagnetic flowmeters are more complicated than other flowmeters, and the requirements are stricter

When in use, the gas remaining in the measuring tube must be exhausted, otherwise it will cause a large measurement error

[0007] (4) When the electromagnetic flowmeter is used to measure viscous liquid with dirt, the viscous or sediment adheres to the inner wall of the measuring tube or the electrode, causing the output potential of the transmitter to change, resulting in measurement error, and the dirt on the electrode reaches a certain level. thickness, which may cause the meter to fail to measure

[0008] (5) Scaling or wear of the water supply pipe changes the inner diameter size, which will affect the original flow value and cause measurement errors

[0012] (2) The main factors that cause flow measurement errors are: measurement errors caused by uneven flow velocity in the pipeline; the medium density cannot be accurately determined when the fluid working conditions change; wet saturated steam is assumed to be dry saturated steam for measurement

If these errors are not limited or eliminated, the total measurement error of the vortex flowmeter will be very large

[0013] (3) Poor anti-vibration performance

[0014] (4) Poor adaptability to measuring dirty media

[0016] (6) Poor temperature resistance

Vortex flowmeters generally only measure the fluid flow of media below 300°C

[0017] In addition, the actual working conditions of the above two flowmeters are different, especially in chemical companies, where the current status of the meter work cannot be monitored in real time. Therefore, the confidence of the data measured by the flowmeter is very low, which seriously deviates from the flow rate. The basic properties of the meter

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