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A method and device for measuring sediment mass sedimentation velocity

A measurement method and sediment technology, applied in measurement devices, fluid velocity measurement, velocity/acceleration/impact measurement, etc., can solve the problems of lowering the liquid level of the settlement tank, increasing the difficulty of data analysis, and heavy workload.

Inactive Publication Date: 2016-06-29
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The workload of this method is very large, and because the liquid level in the settling cylinder will be reduced by taking samples, it will increase the difficulty of data analysis

Method used

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  • A method and device for measuring sediment mass sedimentation velocity
  • A method and device for measuring sediment mass sedimentation velocity
  • A method and device for measuring sediment mass sedimentation velocity

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Embodiment Construction

[0028] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0029] The basic principle of the present invention is: uniformly install the pressure measuring equipment along the height direction of the settling tank, fill the uniformly stirred slurry into the settling tank and let it stand, and the sand concentration will change with time due to sediment settlement, resulting in the pressure measuring equipment The measured pressure changes over time. Since the pressure and the sediment concentration have a strict mathematical correspondence, the change process of the sediment concentration can be calculated by measuring the change process of the pressure, and then the group settlement velocity of the sediment can be calculated.

[0030] Based on the above principles, the measuring device used in a method for measuring sediment mass settling velocity of the present invention is as foll...

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Abstract

The invention relates to a measuring device used in a method for measuring sediment mass sedimentation velocity, which belongs to the field of river engineering model tests. The device includes three parts: a settling tube, a plurality of pressure measuring equipment and a computer; For the container, multiple pressure measuring holes are evenly arranged vertically along the side wall, and the number of pressure measuring holes is not less than 3; the pressure measuring equipment is vertically installed in the pressure measuring hole and sealed with the side wall, the pressure sensing The center of the element is flush with the center of the pressure measuring hole; each pressure measuring device is connected to the computer, and the pressure is measured synchronously under the control of the computer, and the measurement results are sent back to the computer in real time for analysis and storage. The method calculates the change process of the sediment concentration by measuring the change process of the pressure, and then calculates the group sedimentation velocity of the sediment. The invention can realize the automatic, non-interference and accurate measurement of the sedimentation velocity of the sediment group in the sandy water body.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01P5/00G01N15/04
Inventor 陈启刚李文杰李丹勋钟强王兴奎
Owner TSINGHUA UNIV
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