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Method for inverting concentration of suspended particulate matters based on acoustics

A technology of suspended particles and acoustics, applied in particle suspension analysis, suspension and porous material analysis, scientific instruments, etc., can solve the problems that optical instruments are susceptible to biological adhesion interference and water interference, and achieve measurement and strong anti-adhesion capabilities , the effect of high measurement

Inactive Publication Date: 2017-03-29
TIANJIN UNIV
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Problems solved by technology

Although precise corrections can be made using optical methods to obtain high-frequency suspended solids concentration sequences or profiles, they are only point or line measurements, and optical instruments are susceptible to biological adhesion interference, and the measurement is intrusive, which interferes with water bodies.

Method used

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  • Method for inverting concentration of suspended particulate matters based on acoustics
  • Method for inverting concentration of suspended particulate matters based on acoustics
  • Method for inverting concentration of suspended particulate matters based on acoustics

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Embodiment Construction

[0016] In order to make the purpose, technical solution and advantages of the present invention clearer, the implementation manners of the present invention will be further described in detail below.

[0017] The embodiment of the present invention introduces a method for inverting the concentration of suspended particulate matter based on acoustics, aiming at realizing the measurement of the concentration of suspended particulate matter with high temporal and spatial resolution, especially the measurement of the concentration of relatively large particulate matter. The specific implementation steps are as follows:

[0018] 1. Put the acoustic Doppler current profiler into the seawater for fixed-point or navigation observation, and obtain the echo intensity by receiving the backscattering signal of the scatterer in the water.

[0019] 2. Calculation of volumetric backscattering intensity.

[0020] S V =C+10lg(T x +273.16)+20lg(ψR)-L DBW -P DBW +2αR+K c (E-E r )

[0021...

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Abstract

The invention relates to a method for inverting concentration of suspended particulate matters based on acoustics; the method comprises: receiving a back-scattering signal of an underwater scattering body to obtain echo strength by using an acoustic Doppler current profiler; according to a sonic equation, correcting the echo strength by considering acoustic wave geometric attenuation and absorptive attenuation to obtain volume back-scattering strength; according to the corrected volume back-scattering strength, finally inverting the concentration of suspended particulate matters with high time-space resolution in accordance with Rayleigh scattering principle. The method can provide precise concentration of suspended particulate matters.

Description

technical field [0001] The invention relates to the field of ocean suspended particulate matter measurement, in particular to a method for measuring the concentration of suspended particulate matter. Background technique [0002] The concentration of suspended particulate matter is one of the key points of marine observation and research. The most basic thing to observe the dynamic process of suspended particulate matter on site is to clarify the temporal and spatial variation rules of suspended particulate matter concentration. The current observation of suspended solids concentration is mainly based on four methods, namely direct sampling and filtering on site, optical backscattering technology, laser small-angle forward scattering technology, and acoustic backscattering technology. Although high-frequency suspended solids concentration series or profiles can be obtained after precise calibration using optical methods, they are only point or line measurements, and optical ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/06
CPCG01N15/06
Inventor 赵伟凡仁福原野聂红涛赵亮
Owner TIANJIN UNIV
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