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Optical measurement device and method for volume of suspended particles

A suspended particle, optical measurement technology, applied in the direction of volume measurement instruments/methods, measurement devices, particle and sedimentation analysis, etc., can solve the problems of fragile, different body, incomplete appearance, etc., to achieve the effect of volume measurement

Pending Publication Date: 2022-03-11
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, due to the characteristics of suspended particles, especially biodebris, in different shapes, incomplete appearance, irregular shape, and easy to break, the in-situ accurate measurement of the volume of suspended particles, especially biodebris, still faces great challenges.

Method used

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  • Optical measurement device and method for volume of suspended particles
  • Optical measurement device and method for volume of suspended particles

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Experimental program
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Effect test

Embodiment 1

[0039] Such as figure 1 As shown, after the parallel light source 1 is modulated, the suspended particles in the water body of the sample pool are illuminated, and a telecentric lens 5 is arranged in the straight-line propagation direction of the illuminating parallel light (within a certain range of object distance, the magnification of the obtained image will not change) and camera 3 to obtain the image information corresponding to the suspended particles at this angle. On this basis, a parallel light source 2 or several parallel light sources for illumination are provided at other angles, and an imaging system (such as a telecentric lens 6 and a camera 4 ) is correspondingly provided in the straight-line propagation direction of the parallel light source illumination. In this way, simultaneous shooting and measurement of a single suspended particle from several angles can be realized, and flux measurement of suspended particles in the water body can be performed at the same...

Embodiment 2

[0044] Such as figure 2 As shown, the modulated parallel light source 2 passes through the dichroic prism 8 and is divided into two light beams with similar ratios. One beam of light illuminates the suspended particles in the water body of the sample pool that are diverted by the flow tube along the original propagation direction, and in the light propagation direction A telecentric lens 6 and a camera 4 are provided to obtain the image information corresponding to the suspended particles at this angle. Another beam of light reflected by the dichroic prism 8 then passes through the first reflector 9 and the second reflector 10, then incidentally illuminates the suspended particles in the water body of the sample pool in the irradiation direction perpendicular to the parallel light source 2, and passes through the telecentric lens 5 and camera 3 obtain the image information corresponding to the suspended particles at this angle. Thus, the projection image information of the f...

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Abstract

An optical measurement device and method of suspended particle volume, the measurement device comprising at least two illumination modules configured to illuminate suspended particles in a sample cell or a natural body of water from different angles simultaneously, at least two image acquisition modules, and a processing module, the at least two illumination modules being configured to illuminate the suspended particles in the sample cell or natural body of water from different angles simultaneously, the at least two image acquisition modules are configured to simultaneously perform image acquisition on suspended particles in a water body from different angles to obtain projection images of the suspended particles at at least two angles, and the processing module is connected with the at least two image acquisition modules, and the processing module reconstructs a three-dimensional structure model of the suspended particles according to the projection images of the suspended particles at the at least two angles, and calculates the volume of the suspended particles according to the three-dimensional structure model of the suspended particles. Compared with other optical measurement methods, the method has the advantages that the three-dimensional form information of the suspended particles is acquired by using the multi-angle projection images, and more accurate volume measurement of the suspended particles, especially biological debris, is realized.

Description

technical field [0001] The invention relates to the optical measurement technology of suspended particles, in particular to an optical measurement device and method for the volume of suspended particles. Background technique [0002] The data of algae cells, biological debris and other biological suspended particles in water bodies are important basis for the evaluation of water body biomass. The measurement data mainly include the number of algae cells, organic carbon content, types of biological particles and so on. At present, because suspended particles, especially biodetritus, have the characteristics of various shapes, incomplete appearance, irregular shape, and easy breakage, it is still a big challenge to accurately measure the volume of suspended particles, especially biodebris in situ. [0003] It should be noted that the information disclosed in the above background technology section is only for understanding the background of the application, and therefore may ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/00G01N21/84G01F22/00
CPCG01N15/00G01N21/84G01F22/00G01N2021/8405G01N15/01
Inventor 廖然李嘉晋马辉王宏剑
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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