Optical expandable ocean temperature and depth profile measuring probe

Abstract

The invention discloses an optical expandable ocean temperature and depth profile measuring probe which is of a streamline structure and comprises a head cone, an optical fiber spool, a tail shell, a tail fin, an optical fiber and an optical fiber sensor. The head cone is arranged at the front of the measuring probe, the tail shell is arranged at the rear of the measuring probe, the tail fin is arranged on the outside of the tail shell, the optical fiber spool is arranged in the tail shell, the grating sensor is arranged in the head cone, the portion, which is wound on the optical fiber spool, of the optical fiber is connected with the grating sensor, and the portion, which extends out of the rear of the tail shell, of the optical fiber is connected with a laser transmitting and receiving device on a ship. The portion, which is led out of the optical fiber spool, of the optical fiber is processed to form a temperature sensing grating and a pressure sensing grating of the grating sensor. Materials which are high in temperature sensing capacity are coated on the outside of the temperature sensing grating, so that a temperature sensing coating layer can be formed. The pressure sensing grating is positioned at the foremost portion of the grating sensor and is sealed by a pressure sensing shell. The optical expandable ocean temperature and depth profile measuring probe has the advantages that temperatures and depths can be quickly measured in probe descending procedures by the aid of characteristics that wavelengths of reflected light of the gratings are sensitive to the temperatures and grating strain; the measuring probe is simple in structure, low in manufacturing cost, stable in performance and convenient to use.

Description

technical field [0001] The invention relates to a detection device for ocean hydrological profile elements, in particular to an ocean temperature and depth profile measuring probe that can be launched by water surface ships. Background technique [0002] Seawater temperature profile data, that is, "temperature-depth" relationship data is one of the most basic marine environmental elements and a basic quantity reflecting the physical condition of the sea. The rapid acquisition of seawater temperature profile data can be used for marine surveys, marine scientific research and marine development. Take advantage of important assistance. [0003] The ship-borne disposable temperature profile measuring instrument is composed of a disposable measuring probe and a receiving device on board, and the measuring probe and the receiving device are connected by wires. The measuring probe is launched from the ship, and the temperature sensor inside the probe senses and measures the seawat...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that the existing disposable measuring probes cannot directly measure the depth, the present invention introduces a new type of disposable ocean temperature depth profile measuring probe using fiber gratings, which measures the real-time seawater temperature by using the linear correspondence between the reflected wave of the fiber grating and the temperature of the surrounding medium Data, the real-time depth data is obtained by using the relationship between the strain and the reflection wavelength after the fiber grating is stretched and deformed, and the sampling measurement of temperature and depth is completed during the descent of the probe to obtain more accurate seawater temperature profile data

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