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Torsional vibration magneto-electric coupler based on Wedman effect and making method thereof

A magnetoelectric coupling and device technology, applied in the manufacture/assembly of magnetostrictive devices, magnetostrictive devices, parts and components of magnetostrictive devices, etc., can solve problems such as lateral vibration signals and noise interference, and achieve strong magnetic Electric coupling effect, simplified device, and miniaturized design

Active Publication Date: 2018-12-07
XIDIAN UNIV
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Problems solved by technology

[0007] In order to overcome the deficiencies in the prior art that are susceptible to lateral vibration signals and noise interference in the environment, the present invention proposes a torsional vibration magnetoelectric coupling device based on the Wiedemann effect and its manufacturing method

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  • Torsional vibration magneto-electric coupler based on Wedman effect and making method thereof
  • Torsional vibration magneto-electric coupler based on Wedman effect and making method thereof
  • Torsional vibration magneto-electric coupler based on Wedman effect and making method thereof

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Embodiment Construction

[0040] The present invention proposes a torsional vibration magnetoelectric coupling device based on the Wiedemann effect and a manufacturing method thereof, and the technical solution of the present invention will be described in detail through three embodiments. The manufacturing processes of the various embodiments are the same.

[0041] The torsional vibration magnetoelectric coupling device proposed by the present invention includes a magnetostrictive cylinder 1 , a piezoelectric cylindrical shell composite 3 and two bar-shaped permanent magnets 2 . The two permanent magnets 2 are evenly distributed on the outer circumferential surface of the magnetostrictive cylinder 1 and fixed by bonding to form a magnetic fastener.

[0042] The piezoelectric cylinder composite part 3 is spliced ​​by 6-10 piezoelectric strips 4 with an arc-shaped cross section, and the number of the piezoelectric strips is an even number. During splicing, an electrode layer 5 is plated on the splicing...

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Abstract

A torsional vibration magneto-electric coupler based on the Wedman effect and a making method thereof are provided. In the torsional vibration magneto-electric coupler based on the Wedman effect, twopermanent magnets are uniformly distributed and bonded to the outer circumferential surface of a magnetostrictive cylinder to form a magnetic fastener. A piezoelectric cylindrical shell composite is formed by splicing 6 to10 piezoelectric strips with an arc cross section, and the number of the piezoelectric strips is even. During splicing, the splicing surface of every two adjacent piezoelectric strips is coated with an electrode layer of which the thickness is less than or equal to 0.5mm. The polarization directions of two adjacent piezoelectric strips are opposite. The polarization directions of two adjacent electrode layers are opposite. An annular DC magnetic field is generated by using the permanent magnets, and the annular DC magnetic field and an additional AC magnetic field form aspiral magnetic field. A stronger magnetoelectronic coupling effect can be obtained, and higher magneto-electric voltage signals can be output. Moreover, potential noise sources can be filtered, and the signal-to-noise ratio in the sensing mode can be further improved. The torsional vibration magneto-electric coupler has the characteristics of simple structure and miniaturization.

Description

technical field [0001] The invention belongs to the technical field of multiferroic magnetoelectric composite materials and structures, and relates to a magnetoelectric coupling device based on the Wiedemann effect and a manufacturing method thereof. Background technique [0002] Multiferroic magnetoelectric materials contain three types of properties: ferroelectricity, ferromagnetism and ferroelasticity at the same time, so they can realize the magnetoelectric effect, that is, the material generates a polarized electric field (positive magnetoelectric effect) under the action of an external magnetic field or The phenomenon of induced magnetization (inverse magnetoelectric effect). Compared with single-phase magnetoelectric materials, magnetoelectric composite materials can obtain strong magnetoelectric coupling effect at room temperature. have a broad vision of application. [0003] The core components of common magnetoelectric coupling devices are generally layered magne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L41/06H01L41/12H01L41/47H10N35/80H10N35/00H10N35/01
CPCH10N35/80H10N35/00H10N35/101H10N35/01
Inventor 师阳史宝全马玉钦吴寅豪
Owner XIDIAN UNIV
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