Ultrasonic flow meter
US-2015292927-A1 · Oct 15, 2015 · US
Flow rate measurement method and apparatus
US10352741B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10352741-B2 |
| Application number | US-201414514304-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 14, 2014 |
| Priority date | Oct 18, 2013 |
| Publication date | Jul 16, 2019 |
| Grant date | Jul 16, 2019 |
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- Title
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Abstract
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Method and apparatus capable of accurately measuring a flow rate using Gaussian quadrature even under a small number of measurement points are provided. An average for the y-coordinate of values of normal-directional component with respect to the cross-section represented by vz0(x, y) among an estimated flow velocities in a flow passage cross-section is used as Vz0(x), and a weighting function of Gaussian quadrature is set to Vz0(x)L(x), where L(x)=ymax(x)−ymin(x). Further, an average for y of values of normal-directional component with respect to the cross-section of an actual flow velocity represented by vz(x, y) is used as Vz(x), and an integrand is set to Vz(x)/Vz0(x). These values are used to determine an approximate value of a flow rate according to Gaussian quadrature. In addition, a method of virtually offsetting zero-point of the flow velocity distribution to apparently avoid a problem such as reverse flow is provided.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for measuring a flow rate Q of a fluid flowing through a flow passage, wherein the flow rate Q is represented by the following: Q = ∫ S dsv z = ∫ x m i n x m ax dx ∫ y m i n ( x ) y ma x ( x ) dyv z ( x , y ) = ∫ x m i n x m ax dxV z ( x ) L ( x ) where ,
Assignees
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Classifications
- G01F1/00Primary
Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow (measuring a proportion of the volume flow G01F5/00) · CPC title
Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters · CPC title
by using mechanical effects · CPC title
Compensating or correcting for variations in pressure, density or temperature · CPC title
- G01F1/668Primary
Compensating or correcting for variations in velocity of sound · CPC title
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- What does patent US10352741B2 cover?
- Method and apparatus capable of accurately measuring a flow rate using Gaussian quadrature even under a small number of measurement points are provided. An average for the y-coordinate of values of normal-directional component with respect to the cross-section represented by vz0(x, y) among an estimated flow velocities in a flow passage cross-section is used as Vz0(x), and a weighting function …
- Who is the assignee on this patent?
- Japan Aerospace Exploration
- What technology area does this patent fall under?
- Primary CPC classification G01F1/00. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Jul 16 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).