Deep-sea high-sensitivity optical fiber hydrophone

Abstract

The invention discloses a deep-sea high-sensitivity optical fiber hydrophone, which belongs to the field of underwater target monitoring, communication and measurement systems, and comprises an elastic cylinder, an inner mandrel, an outer sleeve and an induction optical fiber; wherein the elastic cylinder is positioned between the inner mandrel and the outer sleeve, the inner mandrel is positionedin the middle of the outer sleeve, and the outer sleeve is positioned in the middle of the inner mandrel. The size of the elastic cylinder is changed under the action of sound pressure, and the outersleeve is used for providing hydrostatic pressure resistance; the sensing optical fiber is wound on the elastic cylinder, the length of the sensing optical fiber changes along with the change of thesize of the elastic cylinder, and then a sound pressure signal is converted into a phase signal to be measured. According to the invention, the elastic cylinder senses that an external sound pressuresignal is compressed and deformed, the sensing optical fiber wound on the elastic cylinder is elongated, and the elastic cylinder does not need to provide hydrostatic pressure resistance, so that highsensitivity can be provided. Therefore, the technical problem that the sound pressure sensitivity is generally low in the prior art is solved.

Description

technical field [0001] The invention belongs to the field of underwater target monitoring, communication and measurement systems, and in particular relates to a deep-sea high-sensitivity optical fiber hydrophone. Background technique [0002] Optical fiber hydrophones are mainly used for the monitoring of sound propagation, noise, reverberation, submarine acoustic characteristics, target acoustic characteristics, etc. in the marine acoustic environment. Through the combination of optical fiber sensing and transmission, an array system for underwater target search, early warning, detection and identification can be formed. Optical fiber hydrophones are suitable for long-distance and large-scale monitoring due to the use of optical fibers as information carriers. They are advanced monitoring methods for modern naval anti-submarine operations and underwater weapon tests, especially for deep-sea-based fixed underwater acoustic detection systems. vital significance. For deep-se...

AI Technical Summary

Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention provides a deep-sea high-sensitivity optical fiber hydrophone, thereby solving the technical problem of generally low sound pressure sensitivity in the prior art

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