Shallow flow rolling wave measurement system and method based on ultrasonic sensor

Abstract

The invention relates to a shallow flow rolling wave measurement system and a shallow flow rolling wave measurement method based on an ultrasonic sensor. The system comprises a plurality of ultrasonic sensors erected on a flat slope; at least two ultrasonic sensors are classified into one group; the multiple ultrasonic sensors are classified into multiple groups; each group of ultrasonic sensors are arrayed horizontally along the water flow direction; the ultrasonic sensors in each group are horizontally arrayed along the water flow direction; the distance between the ultrasonic sensors is greater than the widths of measured rolling waves and less than the distance between the measured rolling waves. According to the system and the method, the ultrasonic sensors are mounted at positions, such as canals, dam spillways or water troughs in the lab, which generate shallow flow rolling waves; the sensitive ultrasonic sensors are used for detecting the change of thickness of water flow, so as to realize observation on the rolling waves and acquisition of precise data, and factors of manmade detection are completely eliminated; various data are fully automatically acquired; the method is precise, quick and labor-saving and resource-saving, and the observation efficiency is improved.

Description

technical field [0001] The invention relates to a thin-layer water flow rolling wave measurement system and method based on an ultrasonic sensor. It is an experimental system and method, a system and a 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 natu...

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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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