A system and method for measuring thin-layer water flow rolling waves based on pressure sensors

Abstract

The invention relates to a thin layer water flow rolling wave measurement system based on a pressure sensor and a method thereof. The system is characterized in that the system comprises a plurality of pressure rolling wave sensors arranged on a flat slope surface; the plurality of pressure rolling wave sensors are divided into a plurality of groups; each group includes the two pressure rolling wave sensors; each group of the pressure rolling wave sensors are arranged in a line form along a water flow direction; distances between the groups of the pressure rolling wave sensors are less than a spacing of a detected rolling wave and are greater than a width of the detected rolling wave; each pressure rolling wave sensor is successively connected to a data acquisition controller and a control computer. In the invention, the pressure rolling wave sensors are installed at positions generating thin layer water flow rolling waves, such as a water channel, a dam spillway or a water tank in a laboratory; the sensitive pressure rolling wave sensors are used to detect thickness changes of the water flow and realize observation of the rolling waves and accurate data acquisition; a man-made detection factor is completely eliminated; various kinds of data acquisition are automatically completed and accurate and rapid performance is achieved; manpower and material resources are saved and observation efficiency is increased.

Description

technical field [0001] The invention relates to a pressure sensor-based thin-layer water flow rolling wave measurement system and method, which is an experimental system and method, a system and method for hydraulic measurement, and a method for measuring thin-layer water flow. Automatic measurement system and method for parameters such as water depth, rolling wave height, period, frequency, and wave velocity, as well as rolling wave momentum and kinetic energy during the process. Background technique [0002] Under certain critical conditions, the surface of slope water flow and open channel water flow often loses stability and develops a series of fluctuation processes. These fluctuations may be periodic, and the wave speed and wave shape remain unchanged, and the wave speed is always greater than the movement speed of water flow particles; Fragmentation eventually occurs. These phenomena are collectively referred to as roll. Rolling waves are often found on natural slo...

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Problems solved by technology

[0003] The existing observation is to use the hydrological probe to observe directly. This method mainly determines the relative position of the probe and the rolling wave manually. Because it is a manual visual measurement, and the rolling wave changes very fast, the human visual inspection often cannot meet the requirements. Some effects, the measurement is difficult to guarantee the accuracy, due to artificial measurement, its stability is poor, each measurement result is not the same, can only increase the number of measurements, and use statistical methods to obtain approximate measurements

This method makes rolling wave measurement a complicated manual labor that needs to be repeated many times. As the physical strength of the person declines, its accuracy becomes worse and worse.

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