A seawater surface temperature and salinity synchronous measurement system and a measurement method

By using random interference or multipath scattering light fields formed by multimode optical fibers or micro/nano scattering structures, and utilizing the statistical entropy characteristic of the overall statistical state of the light field to invert seawater surface temperature and salinity, the problem of simultaneous measurement of temperature and salinity parameters in existing technologies has been solved, and high robustness and stability measurement in complex marine environments has been achieved.

CN121977515BActive Publication Date: 2026-06-23OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
OCEANOGRAPHIC INSTR RES INST SHANDONG ACAD OF SCI
Filing Date
2026-04-09
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

Existing methods for measuring seawater temperature and salinity suffer from signal drift, sensitivity degradation, complex system structure, and difficulty in achieving synchronous and robust measurements of temperature and salinity parameters in complex marine environments. Traditional analytical or empirical models struggle to balance measurement accuracy and robustness.

Method used

By employing multimode optical fibers or micro/nano scattering structures to form random interference or multipath scattering light fields, the surface temperature and salinity of seawater can be inverted through the statistical entropy characteristic of the overall statistical state of the light field. The surface temperature and salinity of seawater can be synchronously inverted using the overall statistical state of the light field, thereby improving the system's resistance to environmental disturbances and its long-term operational stability.

Benefits of technology

It enables simultaneous measurement of temperature and salinity parameters within a single optical channel, improving the system's resistance to environmental disturbances and long-term operational stability, while reducing system complexity, making it suitable for long-term in-situ monitoring in complex marine environments.

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Abstract

The application relates to the field of marine environment monitoring and optical sensing technology, and discloses a seawater surface layer temperature and salinity synchronous measurement system and a measurement method. The system comprises a light source module; an optical sensing module arranged at the seawater surface layer and directly contacted with seawater medium, which forms an output light field with statistical characteristics under the interaction of light and seawater; a light field sampling module which samples the intensity distribution of the output light field and obtains light field statistical data; and a data processing module which constructs a probability model of the light field intensity distribution based on the light field statistical data, extracts a statistical entropy characteristic quantity representing the overall statistical state of the output light field, and inversely obtains the seawater surface layer temperature and salinity by using the response relationship of the statistical entropy characteristic quantity with the seawater temperature and salinity. The application takes the overall statistical state of the light field as the sensing core, has the advantages of strong environmental disturbance resistance, universal structure, easy platform integration and the like, and is suitable for long-term in-situ monitoring of marine buoys, floating balls and the like platforms.
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Citation Information

Patent Citations

  • CN119649230A

  • CN120972195A