Flow velocity measurement system and method for sheet flow

Abstract

The invention relates to a flow velocity measurement system and method for sheet flow. The flow velocity measurement system for the sheet flow comprises a water source and a flow slope, a plurality of positioning marks and fluid dropping devices are arranged on the periphery of the flow slope, an image capturing device is arranged opposite to the flow slope and is connected with an image processing device, the image processing device is connected with a computing device, and the fluid dropping devices and the image capturing device are electrically connected with a controller. Compared with a traditional method, the flow velocity measurement system and method for the sheet flow have the advantages that multiple points can be arranged on an observation area and can be tested and observed at the same time, the field of view is broad, and flow velocity of the sheet flow on a large area can be well observed; a recording process is more objective, manual influences and errors are small, process observation and recording of a tracing segment of the flow can be achieved, direct observation and computation of various feature flow velocities like the maximum flow velocity, the minimum flow velocity, the barycenter flow velocity and the dispersion velocity can be achieved, and observation and computation on the average flow velocity can be more scientific and accurate; the system is quite low in experiment cost and good in economy, and the accuracy can reach a quite high degree.

Description

technical field [0001] The invention relates to a thin-layer water flow velocity measurement system and method, which is an experimental system and method, and a hydraulic measurement experiment system and method for indoor and outdoor thin-layer liquid flow velocity. Background technique [0002] Thin-layer water flow is a form of water movement that exists widely in nature. Compared with the water flow in open channels or rivers, because the thickness of the water flow is very small, it is affected by the contact surfaces such as air and side walls, making the law of flow velocity change very complicated. The migration of ground pollutants, the erosion and initiation of sediment particles, etc. are closely related to the velocity of thin-layer water flow. Especially in some natural environments, the thin-layer water flow cannot even be directly observed with the naked eye, and can only be seen under the indication of a tracer liquid such as a dye. Therefore, the measureme...

AI Technical Summary

Problems solved by technology

Among them, during the measurement process of the staining method, due to the artificial recording of the time, only one time value can often be read, and the overall situation of the water flow in the tracer section cannot be accurately measured.

For the tracer method, an ammeter or an oscilloscope is generally used to measure the time for the electrolyte to pass through the test point, and the average speed is calculated by the ratio of the difference between the time when the electrolyte reaches or passes through two points and the distance between the two points, which cannot solve the problem of electrolyte in water. Diffusion problem

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