A Two-Dimensional Displacement Vector Hydrophone with Magnetic Suspension

A vector hydrophone and two-dimensional displacement technology, which is applied in the direction of instruments, measuring devices, and electromagnetic means, can solve the problems of large range of displacement sensors, sacrifice of sensitivity, and free movement effects, and achieve small size, increased sensitivity, and The effect of strong noise suppression ability

Active Publication Date: 2021-10-01
HARBIN ENG UNIV
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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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  • A Two-Dimensional Displacement Vector Hydrophone with Magnetic Suspension
  • A Two-Dimensional Displacement Vector Hydrophone with Magnetic Suspension
  • A Two-Dimensional Displacement Vector Hydrophone with Magnetic Suspension

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Embodiment Construction

[0025] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention will be further described below in conjunction with the accompanying drawings: the present invention includes a sound-transmitting shell, a non-magnetic metal column shell, two diamagnetic material covers, four Eddy current sensor devices, eight permanent magnets and paramagnetic solutions, among which the consistency between different eddy current sensors is good. The non-magnetic metal cylinder shell is the vibration pickup element of the vector hydrophone, specifically a copper cylinder shell, and the inside is potted with a low-density material. The two diamagnetic material covers are made of graphite, and are installed on the upper and lower end faces of the copper column shell. The vector hydrophone uses an eddy current sensor as its motion sensitive element, specifically a uniaxial displacement sensor to measur...

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Abstract

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. The invention includes a shell part, an inner cylindrical shell part and an interlayer part; wherein, the shell part is a cube with holes reserved around the sides and complete upper and lower surfaces; the inner cylindrical shell part is made of non-magnetic metal material, and is installed in the geometric center inside the shell part , its side circumference is not tangent to the shell part, but a certain gap is reserved; the interlayer part is located between the shell part and the inner cylindrical shell part; the present invention can increase the measurement dimension, increase its sensitivity, and has a The suspension of the hydrophone is improved, and it has the advantages of high installation stability, small size, high sensitivity of low frequency and very low frequency, etc.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01H11/02
CPCG01H11/02
Inventor 洪连进李玥方尔正朱中锐桂晨阳
Owner HARBIN ENG UNIV
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