JPH0666661B2 - Magnetosensitive pulse generator using coaxial cylindrical composite magnetic material - Google Patents

Magnetosensitive pulse generator using coaxial cylindrical composite magnetic material

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Publication number
JPH0666661B2
JPH0666661B2 JP2099780A JP9978090A JPH0666661B2 JP H0666661 B2 JPH0666661 B2 JP H0666661B2 JP 2099780 A JP2099780 A JP 2099780A JP 9978090 A JP9978090 A JP 9978090A JP H0666661 B2 JPH0666661 B2 JP H0666661B2
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Prior art keywords
magnetic
magnetic field
magnet
composite
composite magnetic
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JPH03297215A (en
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昭 松下
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昭 松下
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Description

【発明の詳細な説明】 (イ)産業上の利用分野 本発明は,非対称励磁作用に基づきパルス起電力を誘発
する磁気パルス発生装置に関するものである。
TECHNICAL FIELD The present invention relates to a magnetic pulse generator that induces a pulse electromotive force based on an asymmetric excitation action.

そして本発明のパルス発生装置は,回転や移動を伴う機
器の固定側あるいは運動側の何れか一方に特殊の感磁要
素を配置し,他方に装備した非対称励磁用の永久磁石の
近接離間に応じてパルス信号を出力させようとするもの
である。
In the pulse generator of the present invention, a special magnetic sensing element is arranged on either the fixed side or the moving side of a device that rotates or moves, and the asymmetrical excitation permanent magnets mounted on the other side are moved closer to or separated from each other. To output a pulse signal.

あるいは,配電線等における交流電流に基づく非対称励
磁磁界を印加した時のパルス起電力の誘発現象を利用す
ることによる電流検知器等として広く利用できるもので
ある。
Alternatively, it can be widely used as a current detector or the like by utilizing the induction phenomenon of pulse electromotive force when an asymmetrical excitation magnetic field based on an alternating current in a distribution line or the like is applied.

(ロ)従来の技術 磁気作用によりパルスを発生させる手段として,従来に
も例えば特開昭47-28850号公報のパルス発生装置があ
る。これは検出コイルを有する磁気ワイヤに対して,一
種類のみの外部磁界を一方向に鎖交させた状態から,こ
の磁界を消勢または除去した時にパルスを発生させよう
とするものである。しかるにその出力は概して小さく,
またパルスの発生時点を正確に制御し難いという欠点が
あった。
(B) Conventional Technology As a means for generating a pulse by magnetic action, there is a pulse generator disclosed in Japanese Patent Laid-Open No. 47-28850, for example. This is to generate a pulse when a magnetic wire having a detection coil is deenergized or removed from a state where only one type of external magnetic field is linked in one direction. However, its output is generally small,
Further, there is a drawback that it is difficult to accurately control the point of time of pulse generation.

なお,本発明に関係する技術として,例えば特公昭59−
12142号公報の感磁要素,あるいは特公昭58−54589号公
報の制御信号発生子などがある。
As a technique related to the present invention, for example, Japanese Patent Publication No. 59-
There is a magnetic sensing element disclosed in Japanese Patent No. 12142 or a control signal generator disclosed in Japanese Patent Publication No. 58-54589.

(ハ)発明の目的 本発明は,強磁性体を処理して成る特殊の感磁要素に対
し非対称のセット磁界とリセット磁界とを印加した時点
でパルスを正確に誘発する手段を提供すると共に,量産
性に優れたパルス発生装置とその製造方法を提供しよう
とするものである。
(C) Purpose of the invention The present invention provides means for accurately inducing a pulse when asymmetric set and reset magnetic fields are applied to a special magnetic sensitive element formed by processing a ferromagnetic material, and An object of the present invention is to provide a pulse generator excellent in mass productivity and a manufacturing method thereof.

(ニ)発明の概要 本発明の同軸円筒状複合磁性体を用いたパルス発生装置
は,単軸磁気異方性を備え,外部磁界を印加しても磁界
方向が変わらない磁気的にハードの部分と,外部磁界に
よりその外部磁界の磁化方向に磁化しておくことのでき
る磁気的にソフトの部分との少なくとも二種類の円筒状
の磁性層と,該磁性層のソフトの部分の磁化方向のみを
負方向に転位させる円筒状セット磁石とを同軸状に組合
せて一体化して成る複合磁性体に対し,外部から比較的
大きいリセット磁界を鎖交させたとき前記複合磁性体の
近くに配置した検出コイルに起電力を誘発するように構
成したことを特徴とするものである。
(D) Outline of the invention A pulse generator using the coaxial cylindrical composite magnetic body of the present invention has a uniaxial magnetic anisotropy and is a magnetically hard portion in which the magnetic field direction does not change even when an external magnetic field is applied. And at least two types of cylindrical magnetic layers having a magnetically soft portion that can be magnetized in the magnetization direction of the external magnetic field by an external magnetic field, and only the magnetization direction of the soft portion of the magnetic layer. A detection coil arranged near the composite magnetic body when a relatively large reset magnetic field is externally linked to the composite magnetic body formed by coaxially combining and integrating a cylindrical set magnet that displaces in the negative direction It is characterized in that it is configured to induce an electromotive force.

すなわち,複合磁性体の形状としては,芯部に配置した
円柱状セット磁石の外周部に対し円筒状に処理して成る
感磁要素で被覆し,両者を同軸円筒状に構成したもので
ある。
That is, as the shape of the composite magnetic body, the outer peripheral portion of the cylindrical set magnet arranged in the core portion is covered with a magnetically sensitive element formed by cylindrical treatment, and both are formed into a coaxial cylindrical shape.

あるいは,検出コイルを捲回した前記感磁要素を円筒状
セット磁石の内部空間に装填し,全体として同軸円筒状
に複合磁性体を構成したものである。
Alternatively, the magnetic sensing element wound with the detection coil is loaded in the internal space of a cylindrical set magnet, and a composite magnetic body is formed in a coaxial cylindrical shape as a whole.

このような複合層に処理される感磁要素は,円筒状の磁
性体の内部に張力やひねり等の機械的応力を残留させ
て,単軸磁気異方性を備えた誘導磁気異方性を付与する
ように処理する。
The magneto-sensitive element processed into such a composite layer retains the induced magnetic anisotropy with uniaxial magnetic anisotropy by allowing mechanical stress such as tension and twist to remain inside the cylindrical magnetic body. Process to give.

あるいはまた,前記セット磁石に直接それぞれハード層
とソフト層との磁気複合層を電解法や無電解法で鍍金被
覆するとか,金属微粉等の噴射融着磁性層を被覆して円
筒状の感磁要素を構成することができる。
Alternatively, the set magnet may be directly coated with a magnetic composite layer of a hard layer and a soft layer by electroplating or electroless coating, or by coating a jet fusion magnetic layer of fine metal powder or the like to form a cylindrical magnetic sensitive layer. Elements can be configured.

殊にハード層と磁石とは上記の説明の如く同一方向に磁
化された状態で動作させることが多いものであるから,
セット磁石の同軸表面に磁気的なソフト層のみを直接被
覆して成る複合磁性体を形成しても,その作用効果は同
様である。
In particular, since the hard layer and the magnet are often operated in the state of being magnetized in the same direction as described above,
Even if a composite magnetic body is formed by directly coating only the magnetic soft layer on the coaxial surface of the set magnet, the same effect is obtained.

また,交流電流により磁界を発生する励磁コイル中に前
記同軸円筒状複合磁性体と検出コイルとを装填すること
により,その所定の大きさの交流電流に基づく非対称励
磁磁界が前記複合磁性体に作用した時点で,パルス起電
力を誘発させるように構成することにより電流検知を可
能とするものである。
Further, by mounting the coaxial cylindrical composite magnetic body and the detection coil in an exciting coil that generates a magnetic field by an alternating current, an asymmetric exciting magnetic field based on the predetermined magnitude of the alternating current acts on the composite magnetic body. The current can be detected by configuring to induce a pulse electromotive force at that time.

そしてさらに,複合磁性体を同軸円筒状に構成する場
合,それらに同軸円筒状の非磁性や異種の磁気的性質を
もつ中間層材料を介在させて構成する方法も効果的であ
る。
Further, in the case where the composite magnetic body is formed in a coaxial cylinder shape, a method in which an intermediate layer material having a non-magnetic or different magnetic property of the coaxial cylinder is interposed therebetween is also effective.

(ホ)発明の構成と作用 まず,本発明に用いられる感磁要素と,これを利用して
パルスを誘発させる作用原理について説明する。
(E) Structure and Action of the Invention First, the magnetic sensing element used in the present invention and the action principle for inducing a pulse using the magnetic sensing element will be described.

例えば細い強磁性線にひねり等の機械的応力を加える特
定の処理を施すことにより,線軸方向に単軸磁気異方性
を備え,その線心部付近に比較的保磁力の大きいハード
な部分を有し,その外周部に保磁力の小さいソフトな部
分をもつ,いわゆる感磁要素になる。
For example, when a thin ferromagnetic wire is subjected to a specific process of applying mechanical stress such as twisting, it has uniaxial magnetic anisotropy in the direction of the wire axis, and a hard part with a relatively large coercive force is provided near the wire core. It has a soft part with a small coercive force on its outer periphery, which is a so-called magnetic sensing element.

あるいは,磁気的性質の異なる複数の磁性層を積層また
は混在させて単軸磁気異方性を備えるように処理しても
感磁要素を得ることができるが,いずれにしても本発明
で用いる感磁要素は次のような特異性を有する。
Alternatively, the magnetically sensitive element can be obtained by laminating or mixing a plurality of magnetic layers having different magnetic properties so as to have a uniaxial magnetic anisotropy, but in any case, the magnetic sensing element used in the present invention is obtained. The magnetic element has the following peculiarities.

すなわち,感磁要素のソフトな部分の磁化方向は,外部
から作用させる比較的小さいセット磁界の方向に対応し
て正方向か負方向かに転位しておくことができる。そし
てしかも,リセット磁界によって隣接する保磁力の大き
いハード部分の磁化方向に向けて反転させた場合には,
殊更に急速な反転を生じるという特異な性状をもつ。
That is, the magnetization direction of the soft portion of the magnetic sensing element can be shifted to the positive direction or the negative direction corresponding to the direction of the relatively small set magnetic field applied from the outside. Moreover, when the reset magnetic field reverses the magnetization direction of the adjacent hard portion having a large coercive force,
It has a unique property that it causes a particularly rapid reversal.

故に,この時の急速な反転による磁束変化に基づき,感
磁要素に捲回した検出コイルに急峻なパルス信号を誘起
させることができる。
Therefore, a steep pulse signal can be induced in the detection coil wound around the magnetic sensing element based on the change in magnetic flux due to the rapid reversal at this time.

依って実際に感磁要素に鎖交させる外部磁界として,極
性と大きさの異なる二種類の永久磁石を一定の順序で近
接離間させるとか,交流電流による正負の磁界を特定の
非対称条件で鎖交させるように構成しておけば,本発明
のパルス信号を誘発させることができる。
Therefore, as the external magnetic field actually linked to the magnetic sensing element, two types of permanent magnets with different polarities and magnitudes are closely spaced in a certain order, or the positive and negative magnetic fields due to the alternating current are linked under specific asymmetric conditions. If the pulse signal of the present invention is constituted, the pulse signal of the present invention can be induced.

しかしながら,一般の強磁性体は磁気ヒステリシス特性
を有するから例え一定の強さの磁界を鎖交させたとして
も,それ以前に予めどのように磁化されていたかという
前歴によって,その後の磁性体の磁化状態が著しく異な
る。
However, typical ferromagnetic material even were interlinked magnetic field of constant intensity even from having magnetic hysteresis properties, the prior history of whether has been magnetized in advance how it earlier, the magnetization of the subsequent magnetic The states are significantly different.

従って一定の強さの磁界を鎖交させた場合には,常に同
一の磁化状態にさせるための何等かの対策が必要であ
る。
Therefore, when a magnetic field of constant strength is linked, some measure is always required to keep the same magnetization state.

本発明に用いる複合磁性体においても同様の性質がある
ため,例えば交流電流による規定の大きさの鎖交磁界で
再現性よくパルス信号を誘発させようとするためには,
何等かの補正手段が必要になる。
Since the composite magnetic body used in the present invention has similar properties, for example, in order to induce a pulse signal with good reproducibility in an interlinking magnetic field of a prescribed magnitude by an alternating current,
Some correction means is required.

このことについては,感磁要素の保磁力の小さい部分の
みを負方向に磁化する程度の比較的小さい一定の大きさ
のバイアス磁界,例えばセット磁界を補助磁石によって
常時作用させておくことにより解決できるという磁気バ
イアス効果を明らかにしている。
This can be solved by constantly applying a bias magnetic field of a fixed magnitude, such as a set magnetic field, which is relatively small and magnetizes only the portion of the magnetic sensitive element having a small coercive force in the negative direction, by the auxiliary magnet. The magnetic bias effect is clarified.

しかしながら,セット磁界用の補助磁石を感磁要素の近
くに添わせるように固定したような場合にも,当該磁石
との隔たりの異なる感磁要素の表面各部における磁界の
強さが異なるから,表面各部の磁化状態は当然異なる。
However, even when the auxiliary magnet for the set magnetic field is fixed so as to be placed near the magnetic sensitive element, the magnetic field strength at each part of the surface of the magnetic sensitive element that is different from the magnet is different, The magnetization state of each part is naturally different.

また,セット磁界用の補助磁石が近接離間しながら感磁
要素に印加させるような場合には,さらに印加条件の均
一化が悪くなることは自明である。
In addition, it is obvious that if the auxiliary magnets for the set magnetic field are applied to the magnetic sensing element while being separated from each other, the uniformity of the application conditions becomes worse.

そこで本発明は,感磁要素に対して常時一定のバイアス
磁界,例えばセット磁界を常時均一に作用させておくた
めに円筒状の補助磁石を複合磁性層の感磁要素と同軸状
に組合せ一体化するように構成したものである。
Therefore, in the present invention, a cylindrical auxiliary magnet is coaxially combined and integrated with the magnetic sensing element of the composite magnetic layer in order to constantly apply a constant bias magnetic field, for example, a set magnetic field to the magnetic sensing element. It is configured to do.

(ヘ)発明の実施例 本発明の実施例を図面について説明する。(F) Embodiment of the Invention An embodiment of the present invention will be described with reference to the drawings.

第1図(a)に示すように感磁要素1を,同図(b)に
示す円筒状永久磁石すなわちセット磁界用の補助磁石2
の中心部に挿入し固定して一体化することにより,同軸
円筒状に組み合わされた複合磁性体9が構成される。こ
の場合,検出コイル3は感磁要素1に捲回してあり,4は
そのリード線である。
As shown in FIG. 1 (a), a magnetic sensing element 1 is provided, and as shown in FIG. 1 (b), a cylindrical permanent magnet, that is, an auxiliary magnet 2 for a set magnetic field.
The composite magnetic body 9 combined in a coaxial cylindrical shape is formed by inserting the core into the center of the core and fixing it to integrate. In this case, the detection coil 3 is wound around the magnetic sensing element 1, and 4 is its lead wire.

このような複合磁性体に対し,補助磁石2の発生磁界と
は逆極性のリセット磁界用の主磁石5を近接離間させて
規定以上の強さの磁束を鎖交させることによりパルス信
号を誘起させるように構成した感磁パルス発生装置であ
る。
A pulse signal is induced in such a composite magnetic body by causing a main magnet 5 for a reset magnetic field having a polarity opposite to that of the auxiliary magnet 2 to be close to and separated from each other and interlinking a magnetic flux having a strength higher than a predetermined value. This is a magneto-sensitive pulse generator configured as described above.

このような本発明のパルス発生装置は,上述のように規
定の強さ以上のリセット磁界が鎖交しさえすれば,その
鎖交磁束の変化割合には依存せず,例え超低速で近接離
間したとしも常にほぼ一定の大きさのパルス信号を誘発
させることができるという極めて優れた特異性をもつ。
Such a pulse generator of the present invention does not depend on the rate of change of the interlinkage magnetic flux as long as the reset magnetic field having a strength equal to or higher than the specified intensity interlinks, as described above, and, for example, approaches and separates at ultra-low speed. Even if it does, it has an extremely excellent peculiarity that it can always induce a pulse signal of almost constant magnitude.

これは従来の磁気的なパルス発生器のように,外部から
の鎖交時速Φの単位時間当りの鎖交数,すなわち鎖交磁
束の変化割合に依存する誘器電圧e=−dΦ/dtに従っ
てその大きさが変化するものとは全く異質のものであ
る。
This is according to the attractor voltage e = -dΦ / dt, which depends on the number of linkages per unit time of the interlinking speed Φ from the outside, that is, the rate of change of the interlinkage magnetic flux, like a conventional magnetic pulse generator. It is completely different from the one whose size changes.

故に,例えば移動体や回転体側に主磁石5を装着してお
き,これを複合磁性体に対し近接離間を繰り返すような
時,その接近速度には全く無関係に主磁石5の磁界が作
用しさえすれば確実にほぼ一定の大きさのパルス信号を
誘器させることができる。
Therefore, for example, when the main magnet 5 is mounted on the side of a moving body or a rotating body, and when the main magnet 5 is repeatedly approached and separated from the composite magnetic body, the magnetic field of the main magnet 5 acts irrespective of the approaching speed. By doing so, it is possible to surely induce a pulse signal having a substantially constant magnitude.

この場合,検出コイル3を補助磁石2の外側に捲回して
もよい。
In this case, the detection coil 3 may be wound outside the auxiliary magnet 2.

また,補助磁石2の材質として磁性合金の如き導電性材
料を使用した場合,パルス発生時に短絡コイルとして働
き障害をおよぼすような時には,その対策としてスリッ
ト6が設けられる。
Further, when a conductive material such as a magnetic alloy is used as the material of the auxiliary magnet 2, the slit 6 is provided as a countermeasure when it acts as a short-circuit coil when a pulse is generated and causes an obstacle.

第2図は複合磁性体の他の構成例を示すもので,その芯
部に棒状の補助磁石7を装填し,外周部に少なくとも二
種の異なる磁気性すなわち比較的保磁力の大きい部分と
保磁力の小さい部分とを有する円筒状の感磁要素8で被
覆して,両者を同軸円筒状に構成したものである。
FIG. 2 shows another example of the structure of the composite magnetic body, in which a rod-shaped auxiliary magnet 7 is loaded in the core part thereof, and at least two different magnetic properties, that is, a part having a relatively large coercive force, is provided in the outer peripheral part. The magnetically sensitive element 8 having a portion having a small magnetic force is coated to form a coaxial cylinder.

磁性材料としては磁性合金,磁性酸化物あるいはアモル
ファスなどが適用対象になる。
Applicable magnetic materials include magnetic alloys, magnetic oxides, and amorphous materials.

これらの場合,芯部に非磁性材料その他の芯線を装填す
るような構造にし,その上層部に同軸円筒状の感磁要素
と補助磁石との複数を順次積層状に被覆して成る,いわ
ゆるクラッド状の複合磁性体9を構成することもでき
る。
In these cases, a so-called clad having a structure in which a core is loaded with a non-magnetic material or other core wire, and a plurality of coaxial cylindrical magnetism-sensing elements and auxiliary magnets are sequentially laminated on the upper layer of the structure. It is also possible to configure the composite magnetic body 9 in the shape of a circle.

このようにクラッドして成る複合磁性体9は,例えば張
力やひねり等の機械的応力を加えて連続的な線引きを行
い,感磁要素の内部に応力を残留させて誘導磁気異方性
を付与するように構成することもできる。しかるのち所
定の長さに裁断して使用に供すればよい。
The composite magnetic body 9 clad in this way is subjected to continuous drawing by applying mechanical stress such as tension or twist, and the induced magnetic anisotropy is imparted by leaving the stress inside the magnetic sensitive element. It can also be configured to do so. After that, it may be cut into a predetermined length and used.

あるいはまた,補助磁石7に電解法や無電解法による複
合磁気鍍金層または噴射溶融方式等の積層手段により複
合磁気層を被覆して円筒状の感磁要素8を形成し複合磁
性体9を構成することもできる。
Alternatively, the auxiliary magnet 7 is coated with a composite magnetic layer by a composite magnetic plating layer by an electrolysis method or an electroless method or a lamination means such as an injection melting method to form a cylindrical magnetic sensing element 8 to form a composite magnetic body 9. You can also do it.

さらに,補助磁石7と感磁要素8とで同軸円筒状の複合
磁性体9を構成する場合,それらに同軸円筒状の非磁性
や異種の磁気的性質をもつ材料の中間層10を介在させる
方法も有効である。
Further, in the case of forming the coaxial cylindrical composite magnetic body 9 with the auxiliary magnet 7 and the magnetic sensing element 8, a method of interposing the intermediate layer 10 of the material having the non-magnetic or different magnetic properties of the coaxial cylinder in them Is also effective.

次に,第3図に示したように本発明を回転パルス発生装
置に適用した場合の感磁パルス発生装置に関する実施例
を説明する。
Next, as shown in FIG. 3, an embodiment relating to a magneto-sensitive pulse generator when the present invention is applied to a rotary pulse generator will be described.

まずステータ部17として,感磁要素の保磁力の小さい部
分がセット磁界用の補助磁石と組み合わせられて常時負
方向に磁化されている複合磁性体9と,その近くに全体
を正方向に磁化するための永久磁石すなわち第1主磁石
11が固定されている。
First, as the stator portion 17, a composite magnetic body 9 in which a portion of the magnetic sensing element having a small coercive force is combined with an auxiliary magnet for a set magnetic field and is always magnetized in the negative direction, and in the vicinity thereof, the whole is magnetized in the positive direction. Permanent magnet for the first main magnet
11 is fixed.

そして回動するロータ12には,前記第1主磁石11と同等
の強さを有し負方向に作用する第2主磁石13を装着して
おく。
Then, the rotating rotor 12 is mounted with the second main magnet 13 having the same strength as the first main magnet 11 and acting in the negative direction.

いま,複合磁性体9に第2主磁石13が近接した時点を考
えると,第1主磁石11により前記主磁界が打ち消されて
感磁要素には補助磁石の磁界のみが作用する。次ぎに第
2主磁石13が離間した時点では第1主磁石11の主磁界の
作用が優勢になるから,このとき前述の原理によってパ
ルス起電力が誘発される。
Now, considering the time when the second main magnet 13 comes close to the composite magnetic body 9, the main magnetic field is canceled by the first main magnet 11, and only the magnetic field of the auxiliary magnet acts on the magnetic sensing element. Next, when the second main magnet 13 is separated, the action of the main magnetic field of the first main magnet 11 becomes dominant, and at this time, the pulse electromotive force is induced by the above-described principle.

この場合,ロータ12の周辺に沿って,複合磁性体9と第
1主磁石11とを組み合わせたステータ部17を1組とし,
その複数個を配列し固定しておけば上記の作用原理に基
づいて1回転当り複数個のパルス起電力を誘発させるこ
とができる。
In this case, one set of the stator parts 17 in which the composite magnetic body 9 and the first main magnet 11 are combined is set along the periphery of the rotor 12,
If a plurality of them are arranged and fixed, a plurality of pulse electromotive forces can be induced per one rotation based on the above-mentioned principle of operation.

またロータ12に第2主磁石14および15などの複数個の永
久磁石が装着されておれば,1回転当りの誘発パルスは複
数倍になる。16は回転軸である。
Further, if the rotor 12 is equipped with a plurality of permanent magnets such as the second main magnets 14 and 15, the number of induced pulses per one rotation is multiple. 16 is a rotation axis.

なお,上記説明ではロータ12には第2主磁石を装着して
回動させた場合の作用効果について述べたが,永久磁石
の代わりに軟質磁性材料を用いた歯車状のロータ12を適
用して,その凸部が第1主磁石11に近接して磁路を形成
した時に主磁界の作用が減殺されように構成しても,同
様にパルス起電力を誘発させることができる。
In the above description, the action and effect when the second main magnet is mounted on the rotor 12 and rotated is described. However, the gear-shaped rotor 12 using a soft magnetic material instead of the permanent magnet is applied. The pulse electromotive force can be induced in the same manner even if the convex portion is configured to be close to the first main magnet 11 to form a magnetic path so that the action of the main magnetic field is attenuated.

さらに,歯数の異なる歯車状のロータの複数個をそれぞ
れ同一回転軸に串刺し状に取付けておく。そしてそのそ
れぞれに複合磁性体と永久磁石との組み合わせから成る
ステータ部を対応させて固定しておくことにより,複数
のロータの回動に伴って各複合磁性体の検出コイルから
同時にまたは規定した回転角毎に幾種類かのパルス信号
を誘起させることができる。
Furthermore, a plurality of gear-shaped rotors having different numbers of teeth are attached to the same rotary shaft in a skewered manner. Then, by fixing the stator part, which is composed of the combination of the composite magnetic body and the permanent magnet, to each of them, the detection coil of each composite magnetic body rotates simultaneously or with a specified rotation as the plurality of rotors rotate. Several kinds of pulse signals can be induced for each corner.

第4図は,本発明の複合磁性体を適用した他の実施例
で,感磁パルス発生装置により電流検知装置を構成した
例である。
FIG. 4 shows another embodiment to which the composite magnetic body of the present invention is applied, which is an example in which a current detecting device is constituted by a magnetically sensitive pulse generating device.

すなわち保磁力の大きいハード部分があらかじめ負方向
に配向磁化され,保磁力の小さいソフト部分も補助磁石
7により負方向に磁化された感磁要素8を有する複合磁
性体9に,検出コイル3が捲回されている。そしてこれ
らをスパイラル状導体18の内部空間に装填して構成した
もので,その刃形端子19から交流被検知電流を通電する
ことにより発生させた交番磁界を感磁要素8に鎖交させ
る。
That is, the detection coil 3 is wound around the composite magnetic body 9 having the magnetic sensitive element 8 in which the hard portion having a large coercive force is magnetized in the negative direction in advance and the soft portion having a small coercive force is also magnetized in the negative direction by the auxiliary magnet 7. It has been turned. Then, these are loaded in the internal space of the spiral conductor 18, and an alternating magnetic field generated by passing an AC detected current from the blade terminal 19 is linked to the magnetic sensing element 8.

このようにすると交番磁界に対し補助磁石7の磁界は常
に負方向のバイアス磁界として作用する。依って正方向
の交番磁界がバイアス磁界の約2倍程度に達したとき,
感磁要素8の保磁力の小さい部分の磁化方向のみがいっ
たん正方向に反転する。しかしながら,次の負方向の交
番磁界が作用するときは,バイアス磁界との合成磁界が
感磁要素8に鎖交することになるから,その時点でパル
ス起電力を誘発する。すなわちパルスを1サイクル毎に
誘発させることができる。
By doing so, the magnetic field of the auxiliary magnet 7 always acts as a bias magnetic field in the negative direction with respect to the alternating magnetic field. Therefore, when the alternating magnetic field in the positive direction reaches about twice the bias magnetic field,
Only the magnetization direction of the portion of the magnetic sensing element 8 having a small coercive force is temporarily inverted to the positive direction. However, when the next alternating magnetic field in the negative direction acts, the combined magnetic field with the bias magnetic field will be linked to the magnetic sensing element 8, so that a pulse electromotive force is induced at that time. That is, the pulse can be triggered every cycle.

このような場合,感磁要素のような強磁性体において
は,前述したように磁気ヒステリシス特性に基づき磁化
の前歴によって,従来の方法では前記パルス信号を誘発
させるための外部磁界の大きさが必ずしも一定しないこ
とがあった。
In such a case, in the ferromagnetic material such as the magnetic sensing element, the magnitude of the external magnetic field for inducing the pulse signal is not always required in the conventional method due to the history of magnetization based on the magnetic hysteresis characteristic as described above. Sometimes it wasn't constant.

しかるに本発明においては,補助磁石7のバイアス磁界
を常時均一に作用させてあるため,例えば交流電流の零
点のたびごとに常に一定の磁化状態を保持させることが
できる。依ってあらかじめ規定した検知電流に対応して
パルス発生時点を正確に定めることができる。
However, in the present invention, since the bias magnetic field of the auxiliary magnet 7 is always made to act uniformly, for example, a constant magnetization state can be maintained at every zero point of the alternating current. Therefore, it is possible to accurately determine the pulse generation time point corresponding to the detection current defined in advance.

なお,この実施例ではスパイラル状導体18を励磁コイル
として適用した場合について説明したが,一般的にはソ
レノイド状の巻線に被検知電流を通電し,その磁界中に
複合磁性体9を装填するだけで容易に目的を達成するこ
とができる。
Although the spiral conductor 18 is applied as an exciting coil in this embodiment, generally, a detected current is passed through a solenoid winding, and the composite magnetic body 9 is loaded in the magnetic field. You can easily achieve the purpose.

(ト)発明の効果 本発明の同軸円筒状複合磁性体を用いたパルス発生装置
は比較的簡単な構造で高性能かつ小型に構成することが
できる。
(G) Effect of the Invention The pulse generator using the coaxial cylindrical composite magnetic body of the present invention can be configured with high performance and small size with a relatively simple structure.

従来のように,例えば感磁要素の近くにセット磁界とし
て補助永久磁石を並行に添わせて構成した場合には,そ
の設定位置の違いによって近接離間するリセット磁界用
の主永久磁石4による打ち消しまたは消勢程度に不均衡
を生じる。
As in the prior art, for example, when the auxiliary permanent magnets are arranged in parallel in the vicinity of the magnetic sensitive element as a set magnetic field, the main permanent magnets 4 for the reset magnetic field which are closely spaced due to the difference in the set position cancel or An imbalance occurs in the degree of inaction.

しかるに本発明の如く同軸円筒状複合磁性体の感磁要素
に対し,その中心軸付近にセット磁界が均等に分布する
ように作用させる構造である。
However, as in the present invention, the magnetic sensing element of the coaxial cylindrical composite magnetic body is made to act so that the set magnetic field is evenly distributed in the vicinity of the central axis thereof.

依ってリセット磁界が何れの方向から近接し鎖交したと
しても,パルスの発生時点を再現性よく正確に制御でき
るという大きな効果がある。
Therefore, no matter which direction the reset magnetic field comes close to and interlinks with each other, the pulse generation time can be accurately controlled with good reproducibility.

このことは従来のものと異なり,感磁要素に対する補助
磁石の位置の設定が全く不要となり,取扱いが極めて簡
便になった。
This is different from the conventional one, in that the position of the auxiliary magnet with respect to the magnetic sensing element is completely unnecessary and handling is extremely simple.

そのうえ,セット磁界用の補助磁石と一体化された構成
であるため,当該パルス発生装置がリセット磁界用の主
磁石を組み合わせた二つの部品のみによる超小型が可能
できるから,搖動する小型主磁石と共に組み込むことに
より小型自動発電式腕時計の充電用電源等としても効果
的な適用が可能である。
In addition, since the pulse generator is integrated with the auxiliary magnet for the set magnetic field, the pulse generator can be miniaturized with only two parts that combine the main magnet for the reset magnetic field. By incorporating it, it can be effectively applied as a power source for charging a small automatic power generation wristwatch.

また配電回路における電流検知などに適用する場合に
も,デジタル電流計および過電流計などとして極めて高
精度の計測を可能にするものである。
In addition, when it is applied to current detection in a power distribution circuit, it also enables extremely highly accurate measurement as a digital ammeter and overcurrent meter.

しかも安価に提供することができるので,殊に配線末端
部における種々の多数の負荷に対する事故早期発見用セ
ンサとして適用できる効果がある。
Moreover, since it can be provided at low cost, there is an effect that it can be applied as a sensor for early detection of an accident, especially for various loads at the end of the wiring.

故に広範囲に分散する多数の負荷から検知できるように
配置したセンサからのパルス信号を,光信号に変換し,
光ファイバケーブルの配線網を構成して集中監視制御を
行うことなど多様な利用をはかることができる。
Therefore, the pulse signal from the sensor arranged so that it can be detected from many loads distributed over a wide range is converted into an optical signal,
It can be used for various purposes such as configuring a wiring network of optical fiber cables to perform centralized monitoring control.

【図面の簡単な説明】[Brief description of drawings]

第1図および第2図は本発明の構成例であり,第3図お
よび第4図はその適用例を示したものである。符号は 1,8:感磁要素,2,7:補助磁石, 3:検出コイル,4:リード線, 5;主磁石,6:スリット, 9:複合磁性体,10:中間層, 11:第1主磁石,12:ロータ, 13,14,15:第2主磁石, 16:回転軸,17:ステータ部, 18:スパイラル状導体,19:刃形端子,
1 and 2 show an example of the configuration of the present invention, and FIGS. 3 and 4 show an example of its application. Reference numerals are 1,8: magnetic sensitive element, 2,7: auxiliary magnet, 3: detection coil, 4: lead wire, 5; main magnet, 6: slit, 9: composite magnetic body, 10: intermediate layer, 11: No. 1 main magnet, 12: rotor, 13, 14, 15: second main magnet, 16: rotating shaft, 17: stator part, 18: spiral conductor, 19: blade terminal,

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】単軸磁気異方性を備え,外部磁界を印加し
ても磁化方向が変わらない磁気的にハードの部分と,外
部磁界によりその外部磁界の磁化方向に磁化しておくこ
とのできる磁気的にソフトの部分との少なくとも二種類
の円筒状の磁性層と,該磁性層のソフトの部分の磁化方
向のみを負方向に転位させる円筒状セット磁石とを同軸
状に組合せて一体化して成る複合磁性体に対し,外部か
ら比較的大きいリセット磁界を鎖交させたとき前記複合
磁性体の近くに配置した検出コイルに起電力を誘発する
ように構成したことを特徴とする同軸円筒状複合磁性体
を用いた感磁パルス発生装置
1. A magnetically hard portion which has uniaxial magnetic anisotropy and whose magnetization direction does not change even when an external magnetic field is applied, and is magnetized in the external magnetic field by the external magnetic field. At least two types of cylindrical magnetic layers having a magnetically soft portion and a cylindrical set magnet that displaces only the magnetization direction of the soft portion of the magnetic layer in the negative direction are coaxially combined and integrated. A cylindrical magnet having a structure in which an electromotive force is induced in a detection coil arranged near the composite magnetic body when a relatively large reset magnetic field is externally linked to the composite magnetic body Magnetosensitive pulse generator using composite magnetic material
JP2099780A 1990-04-16 1990-04-16 Magnetosensitive pulse generator using coaxial cylindrical composite magnetic material Expired - Fee Related JPH0666661B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2099780A JPH0666661B2 (en) 1990-04-16 1990-04-16 Magnetosensitive pulse generator using coaxial cylindrical composite magnetic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2099780A JPH0666661B2 (en) 1990-04-16 1990-04-16 Magnetosensitive pulse generator using coaxial cylindrical composite magnetic material

Publications (2)

Publication Number Publication Date
JPH03297215A JPH03297215A (en) 1991-12-27
JPH0666661B2 true JPH0666661B2 (en) 1994-08-24

Family

ID=14256459

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2099780A Expired - Fee Related JPH0666661B2 (en) 1990-04-16 1990-04-16 Magnetosensitive pulse generator using coaxial cylindrical composite magnetic material

Country Status (1)

Country Link
JP (1) JPH0666661B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0494823U (en) * 1991-01-11 1992-08-18
JP2003075519A (en) * 2001-09-04 2003-03-12 Shinkawa Denki Kk Magnetization reversal element
JP2003075191A (en) * 2001-09-04 2003-03-12 Shinkawa Denki Kk Magnetic reversing element
JP5411070B2 (en) * 2010-06-23 2014-02-12 株式会社東海理化電機製作所 Rotation pulse generator

Also Published As

Publication number Publication date
JPH03297215A (en) 1991-12-27

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