An underwater diffuse attenuation coefficient observation device across sea-air medium

By designing an amphibious underwater diffuse attenuation coefficient observation device that spans sea and air media, and employing a cable-free towing automatic deployment and recovery system, combined with flight rotor and buoyancy adjustment, the data quality problem of existing observation devices in low wind and current conditions has been solved, achieving accurate underwater observation and efficient data transmission.

CN117262172BActive Publication Date: 2025-11-18SHENZHEN UNIV
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Patent Information

Application Number
CN202311305134.X
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-10-08
Publication Date
2025-11-18
Estimated Expiration
2043-10-08

AI Technical Summary

Technical Problem

Existing underwater diffuse attenuation coefficient observation devices are difficult to move away from ships when wind and current are weak, which affects the quality of data observation. Recovery time is time-consuming and laborious, and it is difficult to control the descent speed and depth when used in shallow nearshore waters, which can easily damage the probe.

Method used

A transoceanic and trans-air medium amphibious underwater diffuse attenuation coefficient observation device was designed. It adopts an automatic deployment and retrieval method with cable-free towing. It combines a GPS tracking module, a position detection module, an electrical control device and an optical probe. It achieves flight by installing a flight rotor on the arm and uses a pressure control device to adjust buoyancy and a propulsion device to control diving, so as to achieve accurate profile observation.

Benefits of technology

It achieves automatic deployment and retrieval, reduces interference from hull shadows, improves observation accuracy and efficiency, and can maintain a horizontal attitude underwater to control free fall speed and depth, making it suitable for observation in shallow waters.

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Abstract

The application discloses a cross-sea-air medium amphibious underwater diffuse attenuation coefficient observation device, an electrical control device in the body drives a gas pressure control device to adjust the buoyancy of a buoyancy device to realize floating, or drives a propelling device to realize diving; a flight rotor is installed on a machine arm to realize flight; an optical probe samples downlink irradiance data information and measures an attenuation coefficient (KD); a microcomputer carries out operation processing according to the data information of the optical probe; a data transmission module transmits the data information to a ground control center according to the signal of a GPS tracking module; the device can accurately profile the specified water area, effectively controls the observation platform to be far away from a ship to reduce the interference of the ship body shadow, realizes automatic deployment and recovery, saves time and effort, transmits the pretreated observation data back to the base station in the first time when the system is out of water, has better timeliness, keeps a horizontal posture when falling freely underwater, and can control the free fall speed and depth to profile the shallow water area.
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