Experiment submarine topography observation method

Abstract

The invention relates to an experiment submarine topography observation method. The experiment submarine topography observation method includes the steps: stopping the water flow during the experiment process to enable the water body to be clear gradually, thus being convenient for measuring and recording the middle topographic profile of a water tank; and after solving the transformation matrix between two groups of basis vectors, being able to calculate the middle topographic profile of the water tank at any time point according to the topographic profile observed from the side wall of the water tank, and realizing indirect observation of the topographic profile of the middle part of the water tank. As observation and recording of the topographic profile is convenient to perform from the side wall of the water tank and the topographic profile at the middle part of the water tank is hard to measure because suspending sediment exists in the water flow, the experiment submarine topography observation method can indirectly observe the middle topographic profile of the water tank from the side wall of the water tank, thus being high in the experiment efficiency.

Description

technical field [0001] This patent relates to the field of water flow-sediment experiments, in particular to an experimental underwater terrain observation method. Background technique [0002] Experiments are often carried out in laboratory tanks in order to study the changes in bottom topography caused by water flow through local erosion and deposition. Because the sediment in the middle of the tank is less affected by other irrelevant variables, such as the side wall of the tank has the effect of swirl or rebound on the water flow, and the influence of these effects can be minimized in the middle of the tank, so the experimental research is often based on topographic measurements in the middle of the tank data to proceed. The terrain in the middle of the tank can be measured by an ultrasonic depth sounder, but during the experiment, the sediment with small particle size will be suspended in the water body as the water flow starts from the bottom, making it difficult for ...

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Problems solved by technology

The terrain in the middle of the tank can be measured by an ultrasonic depth sounder, but during the experiment, the sediment with small particle size will be suspended in the water body as the water flow starts from the bottom, making it difficult for ultrasonic sounding to accurately measure the change process of the bottom topographic profile in real time Although the side wall of the laboratory tank is often equipped with high-definition glass, even if the water body is turbid, the section of the bottom topography on the side wall can be observed and recorded through the high-definition glass on the side wall, but the side wall effect produced by the side wall of the tank on the water flow will make the water flow appear certain. Therefore, there is a certain difference between the topographic profile at the side wall recorded through the side wall of the tank and the topographic profile in the middle of the tank measured by the ultrasonic depth sounder, and it is difficult to pass through the tank. Topographic profile at the side wall to obtain the topographic profile in the middle of the tank

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