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Filtering method and system based on flow state switching and flow meter

A technology of flow state and filter coefficient, which is applied in the field of filtering, can solve the problems of large fluctuations in the measured value of ultrasonic flowmeters, and achieve the effects of stable and reliable measurement, high measurement repeatability, and variable measurement repeatability

Pending Publication Date: 2021-11-05
杭州晶锐仪器仪表有限公司
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem of large fluctuations in the measured value of the ultrasonic flowmeter, and provide a filtering method, system and flowmeter based on flow state switching

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  • Filtering method and system based on flow state switching and flow meter
  • Filtering method and system based on flow state switching and flow meter
  • Filtering method and system based on flow state switching and flow meter

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Embodiment Construction

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0024] see figure 1 , this embodiment provides a technical solution: a filtering method based on traffic state switching, including the following steps:

[0025] Step S100: Obtain input parameters, the parameters include the current sampled flow value FLOW and the last filtered flow value OLDFLOW;

[0026] Step S200: Calculate the error value ERRRATE according to the input current sampled flow value FLOW and the last filtered flow value OLDFLOW, and judge whe...

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Abstract

The invention discloses a filtering method and system based on flow state switching and a flow meter. The method comprises the following steps: acquiring input parameters that comprise a currently sampled flow value FLOW and a flow value OLDFLOW after last filtering; calculating an error value ERRRATE according to the input currently sampled flow value FLOW and the flow value OLDFLOW after last filtering, and determining whether the flow state is switched or not according to whether the error value ERRRATE meets threshold conditions under different flow states or not, thereby acquiring the current flow state; determining a filter coefficient K according to the current flow state; substituting the filtering coefficient K into a filtering algorithm to filter the currently sampled flow value FLOW, and outputting a filtered flow value FLOW'. According to the present invention, the filtering coefficients are set for filtering according to different flow states, metering is more stable and reliable, and it is ensured that the flowmeter can accurately meter and be stably used for a long time.

Description

technical field [0001] The invention relates to the field of filtering technology, in particular to a filtering method, system and flow meter based on flow state switching. Background technique [0002] With the improvement of people's awareness of environmental protection in recent years, natural gas has been used more and more as a clean and high-quality energy source, and the development of the natural gas industry is also accelerating; the main measuring instruments in the natural gas industry are Roots meters and turbine meters. However, these traditional instruments have shortcomings such as high requirements for metering quality, frequent maintenance, high maintenance costs, and low intelligence. These weaknesses will restrict the rapid development of the natural gas industry. [0003] Compared with differential pressure meters, volumetric meters, and the traditional meters mentioned above, gas ultrasonic flowmeters have the advantages of wide range ratio, intelligenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03H17/02G01F1/66
Inventor 杨建峰
Owner 杭州晶锐仪器仪表有限公司
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