JPH0132447B2 - - Google Patents
Info
- Publication number
- JPH0132447B2 JPH0132447B2 JP60166201A JP16620185A JPH0132447B2 JP H0132447 B2 JPH0132447 B2 JP H0132447B2 JP 60166201 A JP60166201 A JP 60166201A JP 16620185 A JP16620185 A JP 16620185A JP H0132447 B2 JPH0132447 B2 JP H0132447B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- scale
- recording medium
- coaxial
- lattice
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、磁気格子を利用した測尺を行うため
の同軸型磁気スケールに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a coaxial magnetic scale for measuring length using a magnetic grid.
本発明は、磁気格子を利用した測尺を行うため
の同軸型磁気スケールにおいて、磁気記録媒体に
て円柱形状に形成したスケール本体に、その軸長
方向と直交する方向の着磁を施して磁気格子を形
成することによつて、上記磁気格子から強い信号
磁界を発生できるようにしたものである。
The present invention provides a coaxial magnetic scale for measuring length using a magnetic grating, in which a scale body formed in a cylindrical shape using a magnetic recording medium is magnetized in a direction perpendicular to its axial length direction. By forming a lattice, a strong signal magnetic field can be generated from the magnetic lattice.
従来より磁気記録媒体に磁気格子を形成した磁
気スケールは、工作機械における各種操作量等の
測定を行うための例えばスピンドル型磁気スケー
ル装置等の測尺装置として広く用いられている。
2. Description of the Related Art Conventionally, magnetic scales in which a magnetic grating is formed on a magnetic recording medium have been widely used as measuring devices such as spindle-type magnetic scale devices for measuring various manipulated variables in machine tools.
一般に、磁気スケールの磁気記録媒体として用
いられる圧延合金型磁性材料は、圧延磁気異方性
を呈し、圧延方向すなわち軸長方向に磁気容易軸
を有しているので、磁気目盛として面内磁化を施
した横磁界記録による磁気格子を形成するのに適
している。 In general, rolled alloy magnetic materials used as magnetic recording media for magnetic scales exhibit rolling magnetic anisotropy and have a magnetic easy axis in the rolling direction, that is, in the axial direction, so in-plane magnetization is used as a magnetic scale. It is suitable for forming a magnetic lattice using transverse magnetic field recording.
しかし、上述のように軸長方向に磁気容易軸を
有する圧延合金型磁性材料を磁気記録媒体として
用いて上記面内磁化により磁気格子が形成された
従来の磁気スケールでは、強い信号磁界を得るこ
とが難しく、一般に接触型の読取ヘツドにより信
号読取りが行われており、機械的な摩耗損傷を避
けることができない。
However, as described above, in conventional magnetic scales in which a rolled alloy type magnetic material having a magnetic easy axis in the longitudinal direction is used as a magnetic recording medium and a magnetic lattice is formed by the above-mentioned in-plane magnetization, it is difficult to obtain a strong signal magnetic field. Signal reading is generally performed using a contact-type reading head, and mechanical wear and tear cannot be avoided.
そこで、本発明は、上述の如き問題点に鑑み、
スケール本体に形成された磁気格子から強い信号
磁界を発生し、非接触型の信号読取りが可能な同
軸型磁気スケールを提供せんとするものである。 Therefore, in view of the above-mentioned problems, the present invention has been made to
The present invention aims to provide a coaxial magnetic scale that generates a strong signal magnetic field from a magnetic grating formed on a scale body and allows non-contact signal reading.
本発明に係る同軸型磁気スケールは、上述の問
題点を解決するために、磁気記録媒体にて円柱形
状に形成された磁気スケール本体を備え、このス
ケール本体に軸心を中心とする放射状の着磁を軸
長方向に直交する方向に施し、所定の軸長に亘つ
て磁気格子を形成したことを特徴とする。
In order to solve the above-mentioned problems, the coaxial magnetic scale according to the present invention includes a magnetic scale body formed in a cylindrical shape using a magnetic recording medium, and a radial attachment centered on the axis of the scale body. It is characterized in that magnetism is applied in a direction perpendicular to the axial length direction to form a magnetic lattice over a predetermined axial length.
本発明に係る同軸型磁気スケールでは、磁気記
録媒体にて円柱形状に形成された磁気スケール本
体に、その軸長方向と直交する方向の着磁を施す
ことにより、縦磁界記録による磁気格子が形成さ
れる。縦磁界記録により形成される磁気格子は、
横磁界記録によるものよりも強力な信号磁界を発
生することができる。
In the coaxial magnetic scale according to the present invention, a magnetic lattice is formed by longitudinal magnetic field recording by magnetizing a magnetic scale body formed in a cylindrical shape using a magnetic recording medium in a direction perpendicular to its axial length direction. be done. The magnetic lattice formed by longitudinal magnetic field recording is
A signal magnetic field stronger than that produced by transverse magnetic field recording can be generated.
〔実施例）
以下、本発明について一実施例を示す図面に従
い詳細に説明する。[Example] Hereinafter, the present invention will be described in detail with reference to the drawings showing one example.
第１図は、本発明に係る同軸型磁気スケールの
基本的な構成を示す実施例の一部断面斜視図であ
る。 FIG. 1 is a partially sectional perspective view of an embodiment showing the basic configuration of a coaxial magnetic scale according to the present invention.
この実施例は、磁気等方性を呈する磁性材料に
て円柱形状に成形された磁気記録媒体１にて同軸
型磁気スケール本体１０が形成されている。上記
磁気記録媒体１には、このスケール本体１０の軸
長方向（図中一点鎖線にて示す。）に直交する方
向（図中実線矢印にて示す。）に着磁が施され、
縦磁界記録による磁気Hsが所定の軸長に亘つて
形成されている。上記磁気格子Hsを形成するた
めの着磁は、磁気記録媒体１の軸長方向について
互いに隣接する各領域に対して相反する向きに施
されている。この実施例では、上記磁気記録媒体
１の軸長方向に隣接する各領域の磁化状態を模式
的に示した第２図Ａおよび第２図Ｂに示すよう
に、同軸型磁気スケール本体１０の径方向の着磁
にて縦磁界記録による磁気格子Hsが上記磁気記
録媒体１の全周に亘つて形成されている。上記縦
磁界記録による磁気格子Hsは、一般的な面内磁
化なわち横磁界記録による磁気格子と比較して、
強力な着磁が可能で強い信号磁界を発生すること
ができる。 In this embodiment, a coaxial magnetic scale body 10 is formed of a magnetic recording medium 1 formed into a cylindrical shape from a magnetic material exhibiting magnetic isotropy. The magnetic recording medium 1 is magnetized in a direction (indicated by a solid line arrow in the figure) perpendicular to the axial direction (indicated by a dashed line in the figure) of the scale body 10,
A magnetic field Hs is formed over a predetermined axial length by longitudinal magnetic field recording. The magnetization for forming the magnetic lattice Hs is performed in opposite directions for each region adjacent to each other in the axial direction of the magnetic recording medium 1. In this embodiment, as shown in FIGS. 2A and 2B, which schematically show the magnetization state of each region adjacent in the axial direction of the magnetic recording medium 1, the diameter of the coaxial magnetic scale body 10 is A magnetic lattice Hs is formed over the entire circumference of the magnetic recording medium 1 by longitudinal magnetic field recording by directional magnetization. The above-mentioned magnetic lattice Hs based on longitudinal magnetic field recording is compared to a magnetic lattice based on general in-plane magnetization, that is, transverse magnetic field recording.
Strong magnetization is possible and a strong signal magnetic field can be generated.
なお、上述の実施例における同軸型磁気スケー
ル本体１０は、磁気等方性を呈する磁性材料を円
柱形状に成形した磁気記録媒体１にて形成した
が、例えば軸長方向に対して直交する方向に磁化
容易軸を有する合金磁石にて円柱形状に形成し、
上記磁化容易軸方向すなわち軸長方向に対して直
交する方向の着磁を施して、第３図Ａおよび第３
図Ｂに示す同軸型スケール本体１０Ａのように、
磁気記録媒体１の周方向の一部に縦磁界記録によ
る磁気格子Hsを形成するようにしてもよい。 The coaxial magnetic scale main body 10 in the above-described embodiment was formed from the magnetic recording medium 1 formed by molding a magnetic material exhibiting magnetic isotropy into a cylindrical shape. Formed into a cylindrical shape using an alloy magnet with an axis of easy magnetization,
By applying magnetization in the direction of the easy magnetization axis, that is, perpendicular to the axial length direction,
Like the coaxial scale body 10A shown in Figure B,
A magnetic lattice Hs may be formed in a part of the circumferential direction of the magnetic recording medium 1 by longitudinal magnetic field recording.
また、上述の実施例では、スケール本体に軸心
を中心として全周に亘つて放射状の着磁を施すこ
とを説明したが、全周でなく周りの一部分の放射
状の着磁を施すことも必要に応じてできる。 In addition, in the above example, it was explained that the scale body is radially magnetized around the axis center and over the entire circumference, but it is also necessary to radially magnetize a part of the circumference instead of the entire circumference. Can be done depending on.
上述の実施例の説明から明らかなように、本発
明に係る同軸型磁気スケールでは、磁気記録媒体
にて円柱形状に形成された磁気スケール本体に、
その軸長方向と直交する方向の着磁を施すことに
より縦磁界記録による磁気格子が形成され、上記
磁気格子から強い信号磁界を発生することができ
るので、非接触型の信号読取りの可能な同軸型磁
気スケールを提供することができ、所期の目的を
十分に達成することができる。
As is clear from the description of the embodiments above, in the coaxial magnetic scale according to the present invention, the magnetic scale body formed in a cylindrical shape with a magnetic recording medium has a
By magnetizing in the direction perpendicular to the longitudinal direction of the axis, a magnetic lattice is formed by longitudinal magnetic field recording, and a strong signal magnetic field can be generated from the magnetic lattice, making it possible to read coaxial signals without contact. type magnetic scale can be provided, and the intended purpose can be fully achieved.
第１図は本発明に係る同軸型磁気スケールの基
本的な構造を示す実施例の一部断面斜視図であ
る。第２図Ａ，Ｂおよび第３図Ａ，Ｂは、本発明
に係る同軸型磁気スケールにおける磁気記録媒体
の磁化状態の各例を示す各断面図である。
１……磁気記録媒体、１０，１０Ａ……同軸型
磁気スケール、Hs……磁気格子。
FIG. 1 is a partially sectional perspective view of an embodiment showing the basic structure of a coaxial magnetic scale according to the present invention. FIGS. 2A and 2B and 3A and 3B are cross-sectional views showing examples of the magnetization state of the magnetic recording medium in the coaxial magnetic scale according to the present invention. 1...Magnetic recording medium, 10,10A...Coaxial magnetic scale, Hs...Magnetic grating.
Claims (1)
スケール本体を備え、 このスケール本体に軸心を中心とする放射状の
着磁を軸長方向に直交する方向に施し、 所定の軸長に亘つて磁気格子を形成したことを
特徴とする同軸型磁気スケール。[Scope of Claims] 1. A magnetic scale body formed in a cylindrical shape using a magnetic recording medium is provided, and the scale body is magnetized in a radial direction centered on the axis in a direction orthogonal to the longitudinal direction of the axis. A coaxial magnetic scale characterized by a magnetic lattice formed over the axial length of the scale.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16620185A JPS6156904A (en) | 1985-07-27 | 1985-07-27 | Coaxial type magnetic scale |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16620185A JPS6156904A (en) | 1985-07-27 | 1985-07-27 | Coaxial type magnetic scale |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15515980A Division JPS5779410A (en) | 1980-11-06 | 1980-11-06 | Coaxial magnetic scale |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6156904A JPS6156904A (en) | 1986-03-22 |
| JPH0132447B2 true JPH0132447B2 (en) | 1989-06-30 |
Family
ID=15826965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16620185A Granted JPS6156904A (en) | 1985-07-27 | 1985-07-27 | Coaxial type magnetic scale |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6156904A (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS547668U (en) * | 1977-06-17 | 1979-01-18 | ||
| JPS54141950U (en) * | 1978-03-27 | 1979-10-02 | ||
| JPS5559314A (en) * | 1978-10-27 | 1980-05-02 | Sony Corp | Magnetic scale signal detector |
| JPS5779410A (en) * | 1980-11-06 | 1982-05-18 | Sony Corp | Coaxial magnetic scale |
-
1985
- 1985-07-27 JP JP16620185A patent/JPS6156904A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6156904A (en) | 1986-03-22 |
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