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A method and device for acquiring underwater Brillouin scattering spectrum

A technology of Brillouin scattering and scattered light, applied in the computer field, can solve problems such as the inability to adjust the measurement range and the inability to realize real-time Brillouin scattering spectra, and achieve high inversion accuracy and stability, good real-time performance, and low The effect of environmental constraints

Active Publication Date: 2022-03-29
EZHOU INST OF IND TECH HUAZHONG UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current edge detection technology cannot realize the acquisition of the Brillouin line and the overall scattering spectrum, let alone adjust the measurement range
Although the F-P etalon combined with the ICCD detection method can realize the measurement of the overall Brillouin scattering spectrum, but limited by the existing integration time limit of ICCD, none of the methods based on the above-mentioned measuring device can realize the real-time layout of the overall profile in the vertical direction. Rieouin scattering spectrum

Method used

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  • A method and device for acquiring underwater Brillouin scattering spectrum
  • A method and device for acquiring underwater Brillouin scattering spectrum
  • A method and device for acquiring underwater Brillouin scattering spectrum

Examples

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no. 1 example

[0046] See figure 1 , figure 1 A schematic structural diagram of an underwater Brillouin scattering spectroscopy testing system 100 in this embodiment is shown, and the system 100 includes: a band-stop filter 11, a first edge filter 21, a first optical energy detection device 31, The second edge filter 22 , the second light energy detection device 32 and the third light energy detection device 33 . The coordination relationship and functions of each structure are as follows:

[0047] A band-stop filter 11, configured to filter the passing Brillouin scattered light to obtain the Brillouin scattered light after noise removal;

[0048]The first edge filter 21 is configured to receive the Brillouin scattered light after noise removal, pass the first scattered light in the Brillouin scattered light, and obtain reflected first reflected light;

[0049] The first light energy detection device 31 is configured to receive the first scattered light and detect a first energy value in ...

no. 2 example

[0065] see figure 2 , figure 2 A method flowchart of an underwater Brillouin scattering spectrum acquisition method in this embodiment is shown in , the method can use the parameters measured by the system in the first embodiment, and the method includes:

[0066] Step S10: Obtain the first energy value of the first scattered light obtained after the Brillouin scattered light passes through the first edge filter; and obtain the first reflected light that does not pass through the first edge filter; wherein, the first An energy value includes the frequency shift characteristic and the linewidth characteristic of the Brillouin scattered light;

[0067] Step S20: Obtain the second energy value of the second scattered light obtained after the first reflected light passes through the second edge filter; and obtain the second reflected light that has not passed through the second edge filter; wherein, the The second energy value includes the frequency shift feature, frequency sh...

no. 3 example

[0142] see Figure 4 , based on the same inventive concept, an underwater Brillouin scattering spectrum acquisition device 300 is also provided in this embodiment, and the device 300 includes:

[0143] The first energy value acquisition module 301 is configured to acquire the first energy value of the first scattered light obtained after the Brillouin scattered light passes through the first edge filter; and obtain the first reflection that does not pass through the first edge filter light; wherein, the first energy value includes the frequency shift feature and the linewidth feature of the Brillouin scattered light;

[0144] The second energy value obtaining module 302 is configured to obtain the second energy value of the second scattered light obtained after the first reflected light passes through the second edge filter; and obtain the second scattered light that has not passed through the second edge filter. Reflected light; wherein, the second energy value includes the ...

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Abstract

The invention discloses a method and device for acquiring an underwater Brillouin scattering spectrum. The method includes: acquiring a first energy value of the first scattered light obtained after the Brillouin scattered light passes through a first edge filter; and obtaining The first reflected light that does not pass through the first edge filter; acquire the second energy value of the second scattered light obtained after the first reflected light passes through the second edge filter; and obtain the second scattered light that does not pass through the second edge The second reflected light of the filter; obtain the remaining energy value of the second reflected light; according to the first energy value, the transfer function of the first edge filter, the second energy value, the second The transfer function of the edge filter and the residual energy value are used to obtain the spectral frequency shift and spectral linewidth of the Brillouin scattered light; inversion is performed according to the spectral frequency shift and the spectral linewidth to obtain the distribution The spectrum of Rieouin scattered light. The invention can realize the real-time and stable acquisition of the Brillouin scattering spectrum.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to an underwater Brillouin scattering spectrum acquisition method and device. Background technique [0002] Brillouin lidar is a new ocean remote sensing detection technology. By measuring the characteristic parameters such as frequency shift and line width in the Brillouin scattering spectrum of seawater, the inversion of environmental parameters such as ocean sound velocity, temperature and salinity and underwater target detection. [0003] The earliest traditional scanning interferometer technology was used to measure the Brillouin scattering spectrum. The scanning interferometry technology can accurately obtain the scattering spectrum, but the light incident on the interferometer must be strictly collimated, which is difficult in the actual environment; in addition, scanning takes a certain amount of time. The real-time and fast measurement of the scattering spectrum cannot b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/44G01S17/88
CPCG01J3/4412G01S17/88
Inventor 梁琨邬志强徐杨睿张睿哲周波
Owner EZHOU INST OF IND TECH HUAZHONG UNIV OF SCI & TECH
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