Fluid-solid interface wave based sediment concentration detection device and detection method

Abstract

The invention discloses a fluid-solid interface wave based sediment concentration detection device and a detection method, and belongs to the technical field of ultrasonic detection and analysis. Fluid-solid Schotle waves are generated by a signal sending module at an excitation measurement side of an excitation signal module and are propagated along a bed, and fluid-solid Schotle wave signals are received by a signal receiving module; the received signals pass through a signal processing module, and then the average velocity of the Scholte waves is extracted and is processed by an algorithmmodule to obtain the average sediment concentration in a measurement range of the bottom of the detected river. The detection method provided by the invention has a large one-time detection range, and an average effect in a wave propagation range is detected by the fluid-solid Schotle waves because the sediment concentration of small regions is possibly different, accordingly, the overall macro detection and analysis are favorable; the method provided by the invention is favorable for real-time detection without sampling for re-detecting; and the relative amplitude of fluid-solid interface waves is large, so that the measurement accuracy of ultrasound can be relatively improved.

Description

technical field [0001] The invention relates to a sediment content detection device and detection method, belonging to the field of ultrasonic detection and analysis technology, the invention mainly utilizes the relationship between the velocity propagation characteristics of a special wave-Scholte wave propagating along the fluid-solid interface and the fluid density, By measuring the Scholte wave velocity, the fluid density at the bottom of the measured river is indirectly measured to obtain the sediment content. Background technique [0002] As the environment is deteriorating day by day, the problem of sediment in rivers has also become serious. The problems caused by river sedimentation involve the life of the reservoir, the inundation of the reservoir area, the evolution of the waterway at the tail section of the reservoir, the evolution of the port area, the normal operation of the ship locks in the dam area, and the normal operation of the power station, as well as t...

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Problems solved by technology

For example, the measurement principle of the mechanical method is simple, but the stability of the instrument is poor, and the zero point drift is serious; the optical method is more accurate, but it will be affected by factors such as mutual covering between particles and uneven concentration distribution. Because the light in deep water is very dark, it is not conducive to Deep underwater measurement; electrical methods are not sensitive to low sediment content; ultrasonic detection methods are widely used, but need to be further improved in terms of accuracy and measurement range

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