Bottom Type Measuring Device for Velocity of Bottom Sea Water

Abstract

The invention discloses a sinking type measuring device for the flow velocity of seawater at the bottom, aiming to provide a device that is not only convenient for measurement, but also has high measurement accuracy and good stability, and can effectively avoid the electromagnetic flow velocity being affected by the deflection of the electromagnetic flow velocity measuring instrument. It is a submersible measuring device for bottom seawater flow velocity which is a problem of measurement accuracy of the measuring instrument. It includes a mounting frame, a plurality of supporting foot structures arranged at the bottom of the mounting frame for supporting the mounting frame, a ball joint connection structure arranged at the top of the mounting frame, an adaptive pressing device and a flow rate measuring instrument.

Description

technical field [0001] The invention relates to a device for measuring seawater flow velocity, in particular to a sinking type measuring device for bottom seawater flow velocity. Background technique [0002] The bottom seawater flow velocity usually refers to the flow velocity of the water layer at a certain height (such as 0.5 meters) from the seabed. It is one of the key factors that must be considered in the site selection of marine engineering construction such as submarine cable and pipeline laying, sea sand mining, mariculture location determination, and artificial fish reef placement. Rationality of site selection for marine engineering construction. [0003] At present, the commonly used instruments for measuring the velocity of bottom seawater are acoustic Doppler velocity measuring instrument and electromagnetic velocity measuring instrument. The acoustic Doppler current meter only needs to be fixed outside the ship and measured at a certain water depth (similar...

AI Technical Summary

Problems solved by technology

This measurement method not only needs to measure the seawater depth in advance, but is inconvenient to operate; more importantly, due to the influence of ocean currents, the rope and the electromagnetic current velocity measuring instrument will be deflected. Not only is it difficult to ensure the exact position of the electromagnetic current velocity measurement, but the electromagnetic current velocity measuring instrument When the deflection occurs, the electromagnetic current velocity measuring instrument cannot be suspended vertically during the measurement, which will affect the measurement accuracy of the electromagnetic current velocity measuring instrument

[0005] Method 2: Install the electromagnetic current velocity measuring instrument on the installation stand, and connect the rope below the installation stand to the seabed; although this measurement method is easy to operate, it is installed on the seabed when the seabed surface is a slope or uneven. The bench will also tend to be deflected, which will lead to the deflection of the electromagnetic flow velocity measuring instrument, which also affects the measurement accuracy of the electromagnetic flow velocity measuring instrument

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