Gate flow cross section flow measuring method

Abstract

The invention relates to a gate flow cross section flow measurement method, and belongs to the technical field of water conservancy gate flow measurement. According to the technical scheme, within the coverage range of detection beams of a Doppler vertical profile flow velocity sensor, a flow velocity detection point comprises vertical flow velocity below the lower edge of a flashboard, namely within the opening range of the flashboard, and also comprises vertical flow velocity above the lower edge of the flashboard, namely beyond the opening range of the flashboard; a gate measurement and control instrument (7) determines the opening degree of the gate, namely the position of the lower edge of the flashboard through the gate level sensor (5) so as to determine that the lower edge and below of the flashboard are effective flow velocity measurement points to participate in flow velocity calculation, the upper edge of the flashboard is invalid flow velocity measurement points, and the measured flow velocity value is thrown away; and stratified flow measurement is carried out in an effective flow measurement range. The method has the beneficial effects that layered flow measurement is carried out in an effective flow measurement range, the influence of turbulent flow above the lower edge of the flashboard on the lockage flow velocity is avoided, continuous online measurement of the lockage flow can be realized, the lockage flow can be calculated with high precision, and management of a management department is facilitated.

Description

technical field [0001] The invention relates to a method for measuring flow at a water cross section of a gate, which belongs to the technical field of flow measurement of water conservancy gates. Background technique [0002] At present, the calculation formulas used in the existing flow measurement methods of water conservancy gates generally have relatively large errors. The above-mentioned defects have plagued industry personnel for a long time, but there has been no better solution for many years, which limits the application of gate water measurement to a certain extent. The applicant previously applied for 202022291714.6 "A Doppler Water Conservancy Gate Flow Measuring Device", which has the following problems: 1. The Doppler flow velocity sensor uses a single measuring point to measure the flow velocity, which cannot cover the flow velocity at each point of the entire vertical line, and the error 2. The lack of a specific method for flow velocity measurement limits ...

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Problems solved by technology

The above-mentioned defects have plagued industry personnel for a long time, but there has been no better solution for many years, which limits the application of gate water measurement to a certain extent

The applicant previously applied for 202022291714.6 "A Doppler Water Conservancy Gate Flow Measuring Device", which has the following problems: 1. The Doppler flow velocity sensor uses a single measuring point to measure the flow velocity, which cannot cover the flow velocity at each point of the entire vertical line, and the error 2. The lack of a specific method for flow velocity measurement limits the application of this technology to a certain extent

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