JP2015200523A5

JP2015200523A5 -

Info

Publication number: JP2015200523A5
Application number: JP2014078054A
Authority: JP
Filing date: 2014-04-04
Publication date: 2017-03-16
Anticipated expiration: 2034-04-04

Description

また、本発明の他の態様は、上記の磁界検出装置により構成された複数のチャンネルを有する磁気識別装置であって、高周波電流を前記感磁素子の前記磁界検知部である磁性薄膜に印加する電流印加部と、前記感磁素子の前記磁性薄膜に積層されたコイルから検波回路により前記感磁素子の電圧を取り出す電圧取得部と、前記電圧を増幅する増幅回路と、前記複数のチャンネルを切り替えるマルチプレクサと、前記マルチプレクサからの出力を数値化して演算処理を行う演算部と、を有する磁気識別装置である。 According to another aspect of the present invention, there is provided a magnetic identification device having a plurality of channels constituted by the magnetic field detection device, wherein a high-frequency current is applied to a magnetic thin film that is the magnetic field detection unit of the magnetosensitive element. a current applying unit, and the sense of the to voltage acquisition unit eject the voltage of the sensing element by the detection circuit from the coil stacked on the magnetic thin film of the magnetosensitive, an amplifying circuit for amplifying the pre-Symbol voltage, The magnetic identification device includes a multiplexer that switches between the plurality of channels, and an arithmetic unit that performs arithmetic processing by digitizing an output from the multiplexer.

Claims

A plurality of magnets are alternately arranged with their magnetic poles reversed, and between adjacent magnets, there is a feeling of receiving a magnetic field change formed by each adjacent magnet and a magnetic field change formed by adjacent magnets, respectively. A magnetic field detection apparatus comprising a magnetic element.

The magnetic field detection device according to claim 1, wherein the magnetosensitive element is arranged on a plane including a midpoint of the N and S poles of the magnet with the NS direction of the magnet as a normal line.

A magnetic field detection device that detects a change in a magnetic field of a magnet by the magnetic medium by relatively moving a magnetic medium including a magnetic body,
A plurality of magnets and a plurality of magnetosensitive elements are alternately arranged on a substantially straight line,
The plurality of magnets are arranged substantially equidistantly in a direction perpendicular to the transport direction of the magnetic medium such that the NS direction thereof is substantially perpendicular to the surface of the magnetic medium transported. The magnets are arranged so that the magnetic poles in contact with the magnetic medium are alternately switched,
The plurality of magnetosensitive elements are arranged so as to have a magnetic field detection direction in the substantially linear direction, and include a substantially midpoint of the N and S poles of the plurality of magnets with the NS direction of the plurality of magnets as a normal line. Arranged so that the magnetic field detectors of the plurality of magnetosensitive elements are located in a plane,
Each of the plurality of magnetosensitive elements includes a magnetic field change of the two magnets that occurs when the magnetic body is close to the magnetic poles of the two magnets adjacent to the element, and a gap between the magnetic poles of the two magnets. A magnetic field detection device that simultaneously detects a change in the magnetic field of the two magnets due to the magnetization of the magnetic material that occurs when the magnetic material approaches the magnetic field.

The magnetic field detection device according to claim 3, wherein the magnetosensitive element performs differential magnetic field detection between elements adjacent to each other.

5. The magnetic field detection apparatus according to claim 3, wherein a fluxgate sensor that does not require a bias magnetic field is used as the magnetic sensing element .

A magnetic identification device having a plurality of channels constituted by the magnetic field detection device according to any one of claims 1 to 5,
A current application unit that applies a high-frequency current to the magnetic thin film that is the magnetic field detection unit of the magnetosensitive element;
And to voltage acquisition unit eject the voltage of the sensing element by the detection circuit from the coil of the stacked magnetic thin films of the sensing element,
An amplifying circuit for amplifying the pre-Symbol voltage,
A multiplexer for switching the plurality of channels;
An arithmetic unit that performs arithmetic processing by digitizing the output from the multiplexer;
A magnetic identification device.