Magnetic suspension two-dimensional displacement vector hydrophone

Abstract

The invention relates to the field of vector hydrophones, anti-magnetic levitation and eddy current sensors, in particular to a magnetic suspension two-dimensional displacement vector hydrophone. Thehydrophone comprises an outer shell part, an inner cylindrical shell part and an interlayer part, wherein the shell part is a cube with reserved holes in the periphery of the side surface and completeupper and lower surfaces; the internal cylindrical shell part is made of a non-magnetic metal material and is arranged at the geometric center in the outer shell part, and the circumference of the side surface of the internal cylindrical shell part is not tangent to the outer shell part but a certain gap is reserved therebetween; the interlayer part is located between the outer shell part and theinner cylindrical shell part. According to the invention, the measurement dimension can be increased, the sensitivity is increased, the suspension of the traditional vector hydrophone is improved, and the vector hydrophone has the advantages of high installation stability, small size, high low-frequency and very-low-frequency sensitivity and the like.

Description

technical field [0001] The invention relates to the fields of vector hydrophones, anti-magnetic levitation and eddy current sensors, in particular to a magnetic suspension two-dimensional displacement vector hydrophone. Background technique [0002] The emergence of the vector hydrophone is known as the "revolution of underwater acoustic technology". Compared with the traditional sound pressure hydrophone, it can obtain more comprehensive sound field information. The vector hydrophone can obtain vector information in the underwater sound field, including Displacement, vibration velocity, acceleration and sound pressure gradient of water particles. Today, the technology of vibration velocity, acceleration and sound pressure gradient vector hydrophones has matured and is widely used in various fields of underwater acoustics. However, the research on displacement vector hydrophones is still in its infancy. stage. The traditional vector hydrophone is an acceleration vector hyd...

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Problems solved by technology

Referring to the paper "Eddy-current non-inertial displacement sensing for underwater infrasound measurements", the research on the eddy current vector hydrophone has been carried out abroad, but the author has not carried out the experiment underwater, and the hydrophone prototype Due to the large range of the displacement sensor, the sensitivity is sacrificed, and the hydrophone is affected by the suspension rope, which affects its free movement. The paper is generally in the exploration stage.

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