Water depth automatic tracking device and method in unsteady flow simulation test

Abstract

The invention discloses a water depth automatic tracking device in a non-steady flow simulation test, and the device comprises a sleeve, a water surface tracker, and a controller. The water surface tracker is located in the sleeve, and the interior of the sleeve is provided with a first LED, a second LED, a first photodiode, and a second photodiode. The first LED is arranged to be exactly opposite to the first photodiode, and the second LED is arranged to be exactly opposite to the second photodiode. The first and second photodiodes are respectively in signal connection with the controller, and the controller is connected with a first tracking motor and a second tracking motor. According to the invention, the water surface tracker depends on a floating force to move up and down along with a water surface, and then achieves the tracking of a corresponding water depth through the first and second tracking motors. The device control the starting of the tracking motors through the high sensitivity of the photodiodes and LEDs, and improves the tracking precision.

Description

technical field [0001] The invention relates to a water depth automatic tracking device and method in an unsteady flow simulation test, belonging to the field of water conservancy engineering. Background technique [0002] Flow parameters such as flow velocity and elevation at a certain water depth have specific physical meanings. For example, the flow velocity at 0.6 times the water depth represents the average vertical flow velocity, while the free water surface flow velocity is 1.18 times the vertical average flow velocity; in addition, the water surface relative to the base level The elevation difference is the water level. Therefore, in the water flow simulation test, it is often necessary to track the water flow parameters of a certain water depth. The natural water flow is not constant, the water surface is constantly changing, and the water depth also changes accordingly. Therefore, it is necessary to automatically adjust the arrangement of related instruments accord...

AI Technical Summary

Problems solved by technology

The existing automatic tracking devices have the following problems: 1) The water surface detection method mainly uses water resistance or water conduction, and the probe is easily polarized due to the influence of water quality, resulting in low tracking accuracy; 2) Limited by the research objectives, it can only track a single water depth , such as the free water surface (full water depth), which cannot meet the tracking needs of different water depths; 3) There are certain surface waves on the water surface in the unsteady flow simulation test, which can easily cause the tracking device to reciprocate and affect the measurement results of the instrument

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