Method for estimating flow by means of radar wave flow meter

A technology of current measuring instrument and radar wave, which is applied in the field of estimating flow rate by using radar wave current measuring instrument, can solve the problems of section area error, river gradient error, and high measurement requirements, so as to eliminate error, reduce cost and complexity, high precision effect

Inactive Publication Date: 2016-10-19
XIAN SUMMIT TECH
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Problems solved by technology

[0021] 2. Roughness error
[0023] 3. River slope error
[0025] 4. Sectional area error
[0028] (1) There are systematic errors: As analyzed above, since the four calculation parameters are more or less approximate calculations or inevitably introduce errors in the laboratory measurement process, there are systematic errors in the entire flow calculation process. At the same time, these Errors are intersecting and influencing each other, so the overall errors may partly cancel each other out, or they may accumulate together and be further amplified
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  • Method for estimating flow by means of radar wave flow meter
  • Method for estimating flow by means of radar wave flow meter
  • Method for estimating flow by means of radar wave flow meter

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[0077] The present invention will be further introduced below in conjunction with the drawings, but the present invention is not limited by specific embodiments.

[0078] 1. Surface velocity measurement

[0079] Such as figure 2 As shown, the radar wave flow meter generally has multiple probes. Let’s take three probes as an example. These three probes will measure three surface velocities at a certain moment, which we denote as V1, V2, and V3. , These three probes will measure multiple sets of data, which we denote as 1(V1, V2, V3), 2(V1, V2, V3),..., n(V1, V2, V3), of which 1, 2,... , N represents different moments.

[0080] 2. Calculation of synthetic surface velocity

[0081] For the three surface velocities at a certain moment, we take the first moment 1 (V1, V2, V3) as an example. We can artificially set three probes according to the height and position of each probe and the relevant conditions of the river itself. For example, the weight values ​​corresponding to the three fl...

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Abstract

The invention provides a method for estimating flow rate by using a radar current measuring instrument, comprising the following steps: 1) measuring surface flow velocity; 2) calculating synthetic surface flow velocity; 3) calculating average flow velocity; 4) calculating flow rate. The present invention calculates the average flow velocity by establishing the corresponding functional relationship between the surface flow velocity and the average flow velocity, and does not use the Manning formula to calculate the average flow velocity. The present invention needs to measure less data when calculating the flow rate, avoids the inevitable error caused by the measurement to a certain extent, and reduces the cost and complexity required for calculating the flow rate. When the relationship between flow rate, more fitting functions can be used, which has good scalability.

Description

technical field [0001] The invention is a method for estimating the flow rate by using a radar current measuring instrument, which is mainly used for calculating the flow rate and can be widely used in various hydrological and water conservancy calculations. Background technique [0002] At present, the most widely used method for calculating discharge is to multiply the average flow velocity of the river by the average cross-sectional area of ​​the river, as shown in formula (1): [0003] Q=V*A (1) [0004] Among them: A is the average cross-sectional area of ​​the river channel, generally using the average value of multiple measured cross-sectional areas, in square meters (m2); V is the average flow velocity of the river, in meters per second (m / s), and the calculation of the average river velocity V is generally Using the Manning formula, as shown in formula (2): [0005] V = 1 n R ...

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Application Information

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IPC IPC(8): G01F1/66
Inventor 李波杨洪辰罗丁张咏新李致博成虎任建张远康胡国峰杨牧
Owner XIAN SUMMIT TECH
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