Optical fiber vector acoustic-magnetic composite sensor

Abstract

The invention discloses an optical fiber vector acoustic-magnetic composite sensor, which aims to solve the problem that an existing sensor cannot compositely detect a vector sound field and a magnetic field at the same point. The optical fiber vector acoustic-magnetic composite sensor is composed of a spherical mounting shell, a three-dimensional optical fiber vector hydrophone and a three-dimensional optical fiber vector magnetic field sensor. And the hydrophone and the sensor are integrally packaged in the spherical mounting shell. The sensor is composed of a metal cube, six cylindrical supporting columns, six magnetostriction cylinders, six cylinder fixing screws and six magnetic field Michelson interferometers. Magnetic field sensing arm optical fibers and reference arm optical fibersof the six magnetic field Michelson interferometers are respectively wound on shafts of the sensor in six directions. The hydrophone is composed of a hollow mass block, six elastic supporting columnsand three sound field Michelson interferometers, and six sound field sensing arm optical fibers of the three sound field Michelson interferometers are wound on shafts in six directions of the hydrophone respectively. Thus, a three-dimensional vector sound field and a magnetic field can be compositely detected at the same point, and the sensor has the characteristics of passivity and noncontact.

Description

technical field [0001] The invention relates to an optical fiber sensor, in particular to an optical fiber-based sensor capable of composite measurement of vector sound field and magnetic field at the same point. Background technique [0002] With the development of underwater target stealth technology, the detection methods based on single target characteristics such as acoustic field and magnetic field are facing more and more severe challenges, and the joint detection technology of integrated physical field of underwater targets has emerged as the times require. [0003] Fiber optic sensors have become a hot spot in the industry due to their light structure, low cost, easy large-scale formation, and strong environmental adaptability. [0004] At present, optical fiber sensing technology is used for acoustomagnetic detection mainly based on acoustic and magnetic measurement respectively. National University of Defense Technology Hu Yongming and others reported a fiber opt...

AI Technical Summary

Problems solved by technology

[0007] Provide an optical fiber vector acoustomagnetic composite sensor to solve the problem that the existing optical fiber sensor cannot compositely detect the vector acoustic field and magnetic field at the same point

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