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Device and method for measuring sand content of optical sediment solution

A measuring device and technology for sand content, applied in measuring devices, scientific instruments, analysis of suspensions and porous materials, etc. The effect of high degree of automation, wide applicability and easy operation

Active Publication Date: 2012-08-22
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The particle size of suspended sediment in rivers is mostly less than 0.01mm, and the particle size of suspended sediment in some rivers is as small as 0.004mm. For the measurement of suspended sediment concentration in this part, the above methods are either low in automation and complicated in operation, or systematic Complex and expensive; affects accurate measurement of silt concentration

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  • Device and method for measuring sand content of optical sediment solution
  • Device and method for measuring sand content of optical sediment solution
  • Device and method for measuring sand content of optical sediment solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1: The number of calibration experiments is 4 groups. The specific experimental process and experimental data are as follows:

[0036] Take the lower left corner of measuring cylinder 1 as the coordinate origin, and the laser incident angle α is 45°. After the laser angle is fixed, X 0 is the abscissa of the intersection point between the laser and the surface of the sediment solution, in this example X 0 15cm;

[0037] A total of 4 sets of calibration experiments were implemented, that is, four sets of uniform sediment solutions with different concentrations were prepared, the particle size of the sediment particles was 0.004mm, and the sediment concentration ω 1 , ω 2 , ω 3 , ω 4 0.1kg / m respectively 3 , 0.4kg / m 3 , 0.7kg / m 3 , 1.0kg / m 3 .

[0038] Refractive index n corresponding to various concentrations 1 , n 2 , n 3 , n 4 They are: 1.336, 1.352, 1.369, 1.387. The relationship between the sediment concentration and the refractive index is obta...

Embodiment 2

[0043] Example 2: The number of calibration experiments is 4 groups. The specific experimental process and experimental data are as follows:

[0044] Take the lower left corner of measuring cylinder 1 as the coordinate origin, and the laser incident angle α is 45°. After the laser angle is fixed, X 0 is the abscissa of the intersection point between the laser and the surface of the sediment solution, in this example X 0 15cm;

[0045] A total of 4 sets of calibration experiments were carried out, that is, four sets of uniform sediment solutions with different concentrations were prepared, the particle size of the sediment particles was 0.008mm, and the sediment concentration ω 1 , ω 2 , ω 3 , ω 4 1.0kg / m respectively 3 , 1.5kg / m 3 , 2.0kg / m 3 , 2.5kg / m 3 .

[0046] Refractive index n corresponding to various concentrations 1 , n 2 , n 3 , n 4 They are: 1.387, 1.423, 1.463, 1.503. The relationship between the sediment concentration and the refractive index is obta...

Embodiment 3

[0051] Embodiment 3: The number of calibration experiments is 4 groups. The specific experimental process and experimental data are as follows:

[0052] Take the lower left corner of measuring cylinder 1 as the coordinate origin, and the laser incident angle α is 45°. After the laser angle is fixed, X 0 is the abscissa of the intersection point between the laser and the surface of the sediment solution, in this example X 0 15cm;

[0053] A total of 4 sets of calibration experiments were carried out, that is, four sets of uniform sediment solutions with different concentrations were prepared, the particle size of the sediment particles was 0.01mm, and the sediment concentration ω 1 , ω 2 , ω 3 , ω 4 2.5kg / m respectively 3 , 3.0kg / m 3 , 3.5kg / m 3 , 4.0g / m 3 .

[0054] Refractive index n corresponding to various concentrations 1 , n 2 , n 3 , n 4 They are: 1.501, 1.552, 1.597, 1.632. The relationship between the sediment concentration and the refractive index is obt...

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Abstract

The invention discloses a device and a method for measuring the sand content of an optical sediment solution. The device comprises a measurement cylinder, a regulation base, a black and white linear array charge coupled device (CCD) module and a semiconductor laser, wherein the black and white linear array CCD module is arranged at the bottom of the measurement cylinder, and is connected with a computer by an analog / digital (A / D) conversion card. The method is based on a light refraction law; light refractive index is related to the density which is related to the concentration of the solution with sand content, so that the concentrations of the solution with different sand contents are different from one another, and the concentration has a certain correspondence relationship with the sand content, thus the refractive index corresponds to the sand content of the sediment solution, and the relationship between the concentration of the sediment solution and the refractive index can be established by calibration, so that the concentration of the sand content of the sediment solution can be reversely calculated by utilizing the refractive index according to the calibration relationship. The device disclosed by the invention is easy to build and high in measurement accuracy and degree of automation. The method disclosed by the invention is simple in principle, easy to operate, convenient for manufacturing a sand content measuring apparatus suitable for different occasions and wide in applicability.

Description

technical field [0001] The invention relates to a device and method for measuring the concentration of suspended sediment in a water body, which is suitable for measuring the content of silt with a particle diameter of less than 0.02 mm. Background technique [0002] Sediment concentration measurement is an element of hydrological measurement and an indispensable measurement element in hydraulic engineering model experiments. It is very important for analyzing river evolution and solving sediment problems. At present, the commonly used measurement methods include drying weighing method, pycnometer weighing method, photoelectric sand measuring instrument, isotope sand measuring instrument, ultrasonic sand measuring instrument and laser sand measuring method. The particle size of suspended sediment in rivers is mostly less than 0.01mm, and the particle size of suspended sediment in some rivers is as small as 0.004mm. For the measurement of suspended sediment concentration in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06
Inventor 陈红唐洪武唐立模徐艺绯王浩刘芹张汇明
Owner HOHAI UNIV
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