Seawater temperature remote sensing system based on laser scattering
A seawater and laser technology, applied in the temperature measurement of moving fluids, thermometers with physical/chemical changes, thermometers, etc., can solve the problems of long scanning time of F-P scanning interferometer and high cost of edge detection technology, and achieve simple and real-time measurement Good performance and low cost
Pending Publication Date: 2022-04-15
JIANGSU OCEAN UNIV +1
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[0004]In the application of ocean temperature remote sensing, the Brillouin scattering spectrum measurement technology adopted by the Brillouin scattering-based lidar system mainly falls into the following two categories: edge detection technology and F-P Fabry-Pérot (Fabry-Pérot) scanning interferometer technology, in which the cost of edge detection technology is relatively high, and the scanning time of F-P scanning interferometer is long, both of which are limited in practical application
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[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.
[0026] like figure 1 As shown, a seawater temperature remote sensing system based on laser scattering, the system includes:
[0027] The laser emitting part is used to generate laser light, divide the laser light into local oscillator light and probe light, and then focus the probe light to the water area at a specified depth.
[0028] As a device for providing optical energy, the laser light source plays a very important role in the entire measurement system. For ocean remote sensing, since lidar is an active remote sensing device, the laser wavelength plays a very important role in the performance of the entire lidar, because seawater has different absorption rate...
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Abstract
The invention provides a seawater temperature remote sensing system based on laser scattering, and the system comprises a laser emission part which is used for generating laser, dividing the laser into local oscillation light and detection light, and focusing the detection light to a water area with a specified depth; the laser receiving part is used for acquiring a scattering spectrum of Rayleigh Brillouin scattering of the water area to be measured; the photoelectric conversion part is used for converting a scattering spectrum of Rayleigh Brillouin scattering into a spectrum electric signal; and the temperature analysis and calculation part is used for carrying out linear function fitting on spectral line information in the spectral electric signals to obtain corresponding spectral line information parameters so as to calculate the seawater concentration, the seawater temperature and the seawater speed in the scattering area of the backscattered light.
Description
technical field [0001] The invention belongs to the field of underwater temperature remote sensing, in particular to a seawater temperature remote sensing system based on laser scattering. Background technique [0002] Brillouin scattering is an inelastic scattering of light due to density fluctuations of a medium. This medium density fluctuation will also cause a change in the frequency of the photon, which is reflected in the frequency spectrum relative to the frequency shift of the incident photon. When a large number of photons of the same frequency enter the medium in the same direction, the scattered light will not only undergo a Brillouin frequency shift, but also cause a broadening effect due to the interaction with the atoms or molecules of the medium, and finally it is reflected in the spectrum as relative to the center of the laser. The frequency shifted Brillouin scattering peak, through which the seawater temperature can be obtained. [0003] Brillouin scatter...
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IPC IPC(8): G01K11/00G01K13/02G01N21/53
Inventor 鹿国庆管欣童梁丽婷
Owner JIANGSU OCEAN UNIV