Method and device for measuring sediment group settling velocity

A measurement method and technology of measurement device, which are applied in measurement device, fluid velocity measurement, velocity/acceleration/impact measurement, etc., can solve the problems of lowering the liquid level of the settling cylinder, increasing the difficulty of data analysis, and heavy workload.
CN103529237AInactive Publication Date: 2014-01-22TSINGHUA UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2014-01-22
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to a method and a device for measuring sediment group settling velocity and belongs to the field of river model tests. The device comprises a settling barrel, a plurality of pressure measurement devices and a computer, wherein the settling barrel is a cylindrical container which is placed perpendicularly and provided with a cross section of any shape; a plurality of pressure measurement holes are uniformly and perpendicularly formed in one side wall; no less than 3 pressure measurement holes are provided; the pressure measurement devices are perpendicularly mounted in the pressure measurement holes and are sealed with the side wall; centers of sensing elements of the pressure measurement devices are aligned with centers of the pressure measurement holes; the pressure measurement devices are connected with the computer; the pressure intensity is measured under the control of the computer; and a measurement result is returned to the computer for analysis and storage in real time. The method calculates a change process of the sediment concentration by measuring a change process of the pressure intensity, and the sediment group settling velocity is calculated further. According to the method and the device, the sediment group settling velocity in a sandy water body can be measured automatically, without interference and accurately.
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Description

technical field

[0001] The invention belongs to the field of river engineering model tests, in particular to the measurement of sedimentation velocity of sediment groups. Background technique

[0002] In the basic theoretical research and engineering application of sediment movement, the mass sedimentation velocity of sediment is an important parameter. For a single spherical particle, the settling velocity of the fine particle can be calculated by the Stokes formula, the settling velocity of the coarse particle can be calculated by the resistance formula, and the settling velocity of the particle in the transition zone between the coarse and fine particles needs to be measured experimentally; The settling velocity of irregularly shaped particles such as natural sand also needs to be determined through experiments. The traditional single particle settling velocity test is generally to put one particle at a time into a special settling cylinder, record the settling distance ...

Claims

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