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Non-magnetic interference type optical fiber vector hydrophone

A hydrophone and interference type technology, applied in the field of non-magnetic interference type fiber optic vector hydrophone, can solve the problems of high sensitivity magnetic anomaly detection and interference, achieve high sensitivity, prevent magnetostatic or magnetic induction, and eliminate polarization fading. Effect

Pending Publication Date: 2022-02-18
BEIJING AUTOMATION CONTROL EQUIP INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a non-magnetic interference optical fiber vector hydrophone, which can solve the technical problem that the existing interference optical fiber vector hydrophone will interfere with highly sensitive magnetic anomaly detection

Method used

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  • Non-magnetic interference type optical fiber vector hydrophone

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Embodiment Construction

[0032] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. 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. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as any limitation of the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0033] It should be noted that the terminology used here is only used to describe specific implementations, and is not intended...

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Abstract

The invention provides a non-magnetic interference type optical fiber vector hydrophone. The device comprises a non-magnetic spherical shell, and a special-shaped non-magnetic mass block, six compliant cylinders, six non-magnetic top covers, six non-magnetic screws, six polarization-maintaining optical fibers, three polarization-maintaining 2 * 2 couplers and six optical fiber reflectors which are arranged in the non-magnetic spherical shell; wherein the special-shaped non-magnetic mass block comprises a cube base body and six cylinders, the axis of each cylinder is perpendicular to the surface where the cylinder is located and penetrates through the center of the surface where the cylinder is located, and each surface is provided with two circular ring bosses coaxial with the cylinder on the surface where the cylinder is located; the first circular ring boss is connected with the cylinder, and the second circular ring bosses are arranged on the outer side of the first circular ring boss at intervals; the first end of the compliant cylinder is embedded into an annular groove defined by the two annular bosses, the second end of the compliant cylinder is connected with a non-magnetic top cover, and polarization maintaining optical fibers are wound on the outer surface of the compliant cylinder. The invention can solve the technical problem that an existing interference type optical fiber vector hydrophone can generate magnetic interference on high-sensitivity magnetic anomaly detection.

Description

technical field [0001] The invention relates to the technical field of laser and optical fiber sensing, in particular to a non-magnetic interference optical fiber vector hydrophone. Background technique [0002] The optical fiber vector hydrophone is a device that uses optical fiber sensing technology for vector sound field detection. It has the advantages of high sensitivity, light structure, easy formation, resistance to harsh environments, and anti-electromagnetic interference. Among them, the interferometric fiber optic vector hydrophone based on the principle of optical phase detection has the highest sensitivity and can measure extremely small changes, and is a representative of high-performance fiber optic sensors. [0003] With the continuous development of underwater target stealth technology, the detection method based on a single method is facing severe challenges, and the acousto-magnetic composite detection that integrates multiple physical fields such as acoust...

Claims

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Application Information

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IPC IPC(8): G01H9/00
CPCG01H9/004
Inventor 陆星李鹏柏楠万双爱
Owner BEIJING AUTOMATION CONTROL EQUIP INST
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