JPH04122378U - pulse generator - Google Patents
pulse generatorInfo
- Publication number
- JPH04122378U JPH04122378U JP2246191U JP2246191U JPH04122378U JP H04122378 U JPH04122378 U JP H04122378U JP 2246191 U JP2246191 U JP 2246191U JP 2246191 U JP2246191 U JP 2246191U JP H04122378 U JPH04122378 U JP H04122378U
- Authority
- JP
- Japan
- Prior art keywords
- pulse generator
- pulse
- ferromagnetic member
- rotary magnet
- magnetic field
- 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.)
- Granted
Links
- 238000001514 detection method Methods 0.000 claims abstract description 28
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 15
- 230000005291 magnetic effect Effects 0.000 claims abstract description 11
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
(57)【要約】
【目的】 ロータリー磁石の回転数を正確に検出するこ
とができるパルス発生装置を提供することにする。
【構成】 異なる保持力を有する領域を持ち、かつ、外
部磁界の作用により大バルクハウゼン反転現象を生ずる
強磁性部材２と、この強磁性部材２に所定間隔をおいて
巻回された複数の検出コイル３，４とを具備することを
特徴とする。
(57) [Summary] [Purpose] It is intended to provide a pulse generator that can accurately detect the rotation speed of a rotary magnet. [Structure] A ferromagnetic member 2 that has regions with different coercive forces and that produces a large Barkhausen reversal phenomenon due to the action of an external magnetic field, and a plurality of detection elements wound around the ferromagnetic member 2 at predetermined intervals. It is characterized by comprising coils 3 and 4.
Description
【０００１】0001
本考案は、大バルクハウゼン反転現象を生ずる強磁性部材に検出コイルを巻回 してなるパルス発生装置に関するものである。 In this invention, a detection coil is wound around a ferromagnetic member that causes the large Barkhausen reversal phenomenon. The present invention relates to a pulse generator comprising:
【０００２】0002
従来より、パルス発生装置として、周辺部に複数のＮ極Ｓ極が交互に分布した 状態に着磁されている回転体としてのロータリー磁石の回転数を検出するものが 知られている。このパルス発生装置は、ロータリー磁石の近傍に配置されていて 、ロータリー磁石の回転にともなう磁界変化により、パルス信号を発することで そのロータリー磁石の回転数を検出するものである。 Conventionally, as a pulse generator, multiple north and south poles were distributed alternately around the periphery. A device that detects the rotation speed of a rotary magnet as a rotating body that is magnetized in the state Are known. This pulse generator is placed near the rotary magnet. , by emitting a pulse signal due to changes in the magnetic field as the rotary magnet rotates. This detects the rotational speed of the rotary magnet.
【０００３】0003
しかし、従来のこの種のパルス発生装置においては、ロ−タリ−磁石が、ある 一方向（正方向）に回転する場合の出力信号と、なんらかの理由で他方向（逆方 向）に回転した場合の出力信号との間に差がないために、逆方向回転によるパル ス信号を正方向回転のパルス信号と判断してしまうので、ロータリー磁石の回転 数の検出が正確でないという問題がある。 本考案の課題は、ロータリー磁石の回転数を正確に検出することができるパル ス発生装置を提供することにする。 However, in this type of conventional pulse generator, a rotary magnet is used. The output signal when rotating in one direction (forward direction) and the output signal when rotating in the other direction (reverse direction) for some reason. Since there is no difference between the output signal and the output signal when rotating in the opposite direction, the pulse generated by rotating in the opposite direction The rotation of the rotary magnet is judged to be a pulse signal of forward rotation. There is a problem that the number detection is not accurate. The problem with this invention is to use a pulse generator that can accurately detect the rotational speed of a rotary magnet. We will provide a gas generator.
【０００４】0004
本考案によれば、異なる保持力を有する領域を持ち、かつ、外部磁界の作用に より大バルクハウゼン反転現象を生ずる強磁性部材と、この強磁性部材に所定間 隔をおいて巻回された複数の検出コイルとを具備することを特徴とするパルス発 生装置が得られる。 According to the present invention, it has regions with different holding forces and is resistant to the action of an external magnetic field. A ferromagnetic member that causes a larger Barkhausen reversal phenomenon and a predetermined distance between the ferromagnetic member and A pulse generator characterized by comprising a plurality of detection coils wound at intervals. A raw device is obtained.
【０００５】[0005]
【実施例】 次に本考案の１実施例を図面に基いて説明する。 図１は本考案の一実施例を示す図である。図１に示すようにパルス発生装置１ は、強磁性部材２の２箇所に所定間隔をおいて第１の検出コイル３および第２の 検出コイル４を同じ巻方向で巻回してなる。前記強磁性部材２は、異なる保磁力 を有する領域を持ち、かつ、外部磁界の作用により大バルクハウゼン反転現象を 生ずるものである。【Example】 Next, one embodiment of the present invention will be described based on the drawings. FIG. 1 is a diagram showing an embodiment of the present invention. Pulse generator 1 as shown in Figure 1 The first detection coil 3 and the second detection coil are placed at a predetermined interval in two places on the ferromagnetic member 2. The detection coil 4 is wound in the same winding direction. The ferromagnetic member 2 has different coercive forces. , and the large Barkhausen reversal phenomenon occurs due to the action of an external magnetic field. It is something that occurs.
【０００６】 前記第１の検出コイル３からはＡ相のパルス信号を、第２の検出コイル４から はＢ相のパルス信号を出力するようにしたものである。前記パルス発生装置１は 、ロータリー磁石５の近傍に配置される。このロータリー磁石５は、図２に示す ようにその周辺部に複数のＮ極およびＳ極とが交互に着磁されている。パルス発 生装置１の検出位置での磁界分布が図３に示すような変化となるようにパルス発 生装置１の近傍には、バイアス磁石６が配置されている。磁界の変化が正負対称 でないことにより正方向に大きく負方向に小さいパルス電圧７，８を図４に示す ように第１および第２の検出コイル３，４に誘起させることができる。 前記ロータリー磁石５が回転し、パルス発生装置１に図３に示すような磁界が 印加されると、第１および第２の検出コイル３，４には正負のパルス電圧７，８ がそれぞれに誘起される。その時の正パルス電圧７は、負パルス電圧８よりも大 きい。[0006] The first detection coil 3 outputs an A-phase pulse signal, and the second detection coil 4 outputs an A-phase pulse signal. is designed to output a B-phase pulse signal. The pulse generator 1 is , are arranged near the rotary magnet 5. This rotary magnet 5 is shown in FIG. A plurality of N poles and S poles are alternately magnetized around the periphery. pulse generation The pulses are emitted so that the magnetic field distribution at the detection position of the raw device 1 changes as shown in Figure 3. A bias magnet 6 is placed near the raw device 1 . Changes in magnetic field are symmetrical between positive and negative Figure 4 shows pulse voltages 7 and 8 that are large in the positive direction and small in the negative direction. This can be induced in the first and second detection coils 3 and 4 in this manner. The rotary magnet 5 rotates, and a magnetic field as shown in FIG. 3 is generated in the pulse generator 1. When applied, positive and negative pulse voltages 7 and 8 are applied to the first and second detection coils 3 and 4. are induced in each. At that time, the positive pulse voltage 7 is greater than the negative pulse voltage 8. Hey.
【０００７】 また前記ロータリー磁石５の回転方向を時計まわりが正方向回転、反時計まわ りが逆方向回転とした場合、第１および第２の検出コイル３，４には位相のずれ たパルス電圧が、正方向回転の場合は図４（ａ）に示すように第１の検出コイル ３によるパルス電圧（Ａ相）が第２の検出コイル４によるパルス電圧（Ｂ相）よ りも早く、かつ、逆回転方向の場合は図５（ａ）に示すように第２の検出コイル ４によるパルス電圧（Ｂ相）の方が第１の検出コイル３によるパルス電圧（Ａ相 ）よりも早く出力されることになる。[0007] In addition, the rotation direction of the rotary magnet 5 is clockwise, positive rotation, and counterclockwise rotation. When the coils rotate in opposite directions, there is a phase shift between the first and second detection coils 3 and 4. If the pulse voltage is for positive rotation, the first detection coil The pulse voltage (A phase) generated by 3 is higher than the pulse voltage (B phase) generated by the second detection coil 4. If the rotation direction is faster and the rotation is in the opposite direction, the second detection coil The pulse voltage (B phase) generated by 4 is higher than the pulse voltage (A phase) generated by the first detection coil 3. ) will be output sooner.
【０００８】 これらのパルス電圧をコンパレーター等により処理された波形の例を図４（ｂ ）および図５（ｂ）に示す。Ａ相パルス電圧およびＢ相パルス電圧の位相差は、 図６に示すように、第１および第２の検出コイル３，４間の距離に依存しており 、その大きさは５０ヘルツの回転速度でおおよそ数十マイクロ秒である。[0008] An example of the waveform obtained by processing these pulse voltages by a comparator etc. is shown in Figure 4(b). ) and shown in FIG. 5(b). The phase difference between the A-phase pulse voltage and the B-phase pulse voltage is As shown in FIG. 6, it depends on the distance between the first and second detection coils 3 and 4. , its magnitude is approximately several tens of microseconds at a rotation speed of 50 Hz.
【０００９】[0009]
本考案のパルス発生装置は、ロータリー磁石の正逆の回転方向に対応して異な るパルス信号を発生することができるので、ロータリー磁石の回転数を正確に検 出することができる。 The pulse generator of the present invention has different pulse generators depending on the forward and reverse rotation directions of the rotary magnet. Since the pulse signal can be generated, the rotation speed of the rotary magnet can be accurately detected. can be released.
【提出日】平成３年１１月１３日[Submission date] November 13, 1991
【手続補正２】[Procedural amendment 2]
【補正対象書類名】明細書[Name of document to be amended] Specification
【補正対象項目名】０００４[Correction target item name] 0004
【補正方法】変更[Correction method] Change
【０００４】0004
本考案によれば、異なる保持力を有する領域をもち、かつ、外部磁界の作用に より大バルクハウゼン反転現象を生ずる強磁性部材と、この強磁性部材に所定間 隔をおいて巻回された複数の検出コイルと、これらの検出コイルの近傍に回転自 在に配置されたロータリー磁石と、前記検出コイルの近傍に配置されたバイアス 磁石 とを具備することを特徴とするパルス発生装置が得られる。According to the present invention, there is provided a ferromagnetic member which has regions having different coercive forces and which causes a large Barkhausen reversal phenomenon due to the action of an external magnetic field, and a plurality of ferromagnetic members wound at predetermined intervals around the ferromagnetic member. There is obtained a pulse generator characterized in that it comprises detection coils, rotary magnets rotatably arranged near these detection coils , and bias magnets arranged near said detection coils.
【図１】本考案の一実施例を示す正面図である。FIG. 1 is a front view showing an embodiment of the present invention.
【図２】ロータリー磁石の近傍に本考案のパルス発生装
置を配置した一実施例を示す平面図である。FIG. 2 is a plan view showing an embodiment in which a pulse generator of the present invention is arranged near a rotary magnet.
【図３】図２に示したロータリー磁石によって本考案の
パルス発生装置に印加される磁界の変化分布を示した図
である。3 is a diagram showing a variation distribution of the magnetic field applied to the pulse generator of the present invention by the rotary magnet shown in FIG. 2; FIG.
【図４】ロータリー磁石が正回転する場合に本考案のパ
ルス発生装置が発生するパルス信号およびそのパルス信
号を処理するコンパレーターの出力信号の１例を示す図
である。FIG. 4 is a diagram showing an example of a pulse signal generated by the pulse generator of the present invention when the rotary magnet rotates in the forward direction and an output signal of a comparator that processes the pulse signal.
【図５】ロータリー磁石が逆回転する場合に本考案のパ
ルス発生装置が発生するパルス信号およびそのパルス信
号を処理するコンパレーターの出力信号の１例を示す図
である。FIG. 5 is a diagram showing an example of a pulse signal generated by the pulse generator of the present invention when the rotary magnet rotates in reverse, and an output signal of a comparator that processes the pulse signal.
【図６】第１および第２の検出コイルの間隔と本考案の
パルス発生装置が発生するパルス信号の位相差との関係
を示す図である。FIG. 6 is a diagram showing the relationship between the interval between the first and second detection coils and the phase difference of the pulse signal generated by the pulse generator of the present invention.
１ パルス発生装置 ２ 強磁性部材 ３ 第１の検出コイル ４ 第２の検出コイル ５ ロータリー磁石 1 Pulse generator 2 Ferromagnetic member 3 First detection coil 4 Second detection coil 5 Rotary magnet
【手続補正書】[Procedural amendment]
【提出日】平成３年１１月１３日[Submission date] November 13, 1991
【手続補正１】[Procedural amendment 1]
【補正対象書類名】明細書[Name of document to be amended] Specification
【補正対象項目名】実用新案登録請求の範囲[Name of item to be amended] Scope of claims for utility model registration
【補正方法】変更[Correction method] Change
【補正内容】[Correction details]
【実用新案登録請求の範囲】[Scope of utility model registration request]
【請求項１】 異なる保持力を有する領域をもち、か
つ、外部磁界の作用により大バルクハウゼン反転現象を
生ずる強磁性部材と、この強磁性部材に所定間隔をおい
て巻回された複数の検出コイルと、これらの検出コイル
の近傍に回転自在に配置されたロータリー磁石と、前記
検出コイルの近傍に配置されたバイアス磁石とを具備す
ることを特徴とするパルス発生装置。
─────────────────────────────────────────────────────
1. A ferromagnetic member having regions having different coercive forces and causing a large Barkhausen reversal phenomenon under the action of an external magnetic field, and a plurality of detection elements wound around the ferromagnetic member at predetermined intervals. coils and these detection coils
a rotary magnet rotatably arranged near the
1. A pulse generator comprising: a bias magnet disposed near a detection coil . ──────────────────────────────────────────────── ───
【手続補正書】[Procedural amendment]
【提出日】平成３年１１月１３日[Submission date] November 13, 1991
【手続補正３】[Procedural amendment 3]
【補正対象書類名】図面[Name of document to be corrected] Drawing
【補正対象項目名】図２[Correction target item name] Figure 2
【補正方法】変更[Correction method] Change
【補正内容】[Correction details]
【図２】 [Figure 2]
Claims (1)
つ、外部磁界の作用により大バルクハウゼン反転現象を
生ずる強磁性部材と、この強磁性部材に所定間隔をおい
て巻回された複数の検出コイルとを具備することを特徴
とするパルス発生装置。1. A ferromagnetic member having regions having different coercive forces and causing a large Barkhausen reversal phenomenon under the action of an external magnetic field, and a plurality of detection elements wound around the ferromagnetic member at predetermined intervals. A pulse generator comprising a coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2246191U JP2547533Y2 (en) | 1991-03-15 | 1991-03-15 | Pulse generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2246191U JP2547533Y2 (en) | 1991-03-15 | 1991-03-15 | Pulse generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04122378U true JPH04122378U (en) | 1992-11-02 |
| JP2547533Y2 JP2547533Y2 (en) | 1997-09-10 |
Family
ID=31907957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2246191U Expired - Lifetime JP2547533Y2 (en) | 1991-03-15 | 1991-03-15 | Pulse generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2547533Y2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009025226A (en) * | 2007-07-23 | 2009-02-05 | Hst Kk | Magnetic sensor |
| WO2014128937A1 (en) * | 2013-02-22 | 2014-08-28 | 三菱電機株式会社 | Rotation speed detector |
| WO2020255682A1 (en) * | 2019-06-21 | 2020-12-24 | パナソニックＩｐマネジメント株式会社 | Rotation detector, and motor comprising same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10259223B3 (en) * | 2002-11-20 | 2004-02-12 | Mehnert, Walter, Dr. | Position detector registering rotary- or linear motion, includes excitation magnet, ferromagnetic component, coil and sensor |
-
1991
- 1991-03-15 JP JP2246191U patent/JP2547533Y2/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009025226A (en) * | 2007-07-23 | 2009-02-05 | Hst Kk | Magnetic sensor |
| WO2014128937A1 (en) * | 2013-02-22 | 2014-08-28 | 三菱電機株式会社 | Rotation speed detector |
| JP5976194B2 (en) * | 2013-02-22 | 2016-08-23 | 三菱電機株式会社 | Rotational speed detector |
| JPWO2014128937A1 (en) * | 2013-02-22 | 2017-02-02 | 三菱電機株式会社 | Rotational speed detector |
| US9664535B2 (en) | 2013-02-22 | 2017-05-30 | Mitsubishi Electric Corporation | Rotation number detector |
| WO2020255682A1 (en) * | 2019-06-21 | 2020-12-24 | パナソニックＩｐマネジメント株式会社 | Rotation detector, and motor comprising same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2547533Y2 (en) | 1997-09-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19970408 |