JPS5814058A - Rotation signal generator - Google Patents
Rotation signal generatorInfo
- Publication number
- JPS5814058A JPS5814058A JP56112551A JP11255181A JPS5814058A JP S5814058 A JPS5814058 A JP S5814058A JP 56112551 A JP56112551 A JP 56112551A JP 11255181 A JP11255181 A JP 11255181A JP S5814058 A JPS5814058 A JP S5814058A
- Authority
- JP
- Japan
- Prior art keywords
- rotor
- magnetic material
- amorphous magnetic
- coil
- signal generator
- 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.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)
- Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)
Abstract
Description
【発明の詳細な説明】 号を発生する信号発生器に関する。[Detailed description of the invention] This invention relates to a signal generator that generates a signal.
この種の信号発生器には、永久磁石の磁力でリードスイ
゛ノチを閉とするオン・オフタイプのもの、およびピッ
クアップコイルで磁力変化に応じた電圧を誘起するタイ
プのものがある。リードスイッチを用いるものではリー
ド接点の耐久性が問題であり、ピックアップコイルを用
いるものでは永久磁石ロータの回転速度が低いと誘起電
圧が低いので低速域での応答性が低いという問題がある
。This type of signal generator includes an on-off type in which a reed switch is closed using the magnetic force of a permanent magnet, and a type in which a pickup coil induces a voltage according to changes in magnetic force. Those using reed switches have a problem with the durability of the reed contacts, and those using pickup coils have a problem of low responsiveness in the low speed range because the induced voltage is low when the rotation speed of the permanent magnet rotor is low.
本発明は永久磁石ロータタイプの、耐久性が高くしかも
低速域での応答性が高い回転信号発生器を提蚕すること
を第１の目的とし、パルス化処理が容易で低速域におい
ても回転に正確に同期したパルスを得ることができる回
転信号発生器を提供すること！第２の目的とする。The primary purpose of the present invention is to provide a permanent magnet rotor type rotation signal generator that is highly durable and has high responsiveness in the low speed range. To provide a rotation signal generator capable of obtaining accurately synchronized pulses! This is the second purpose.
上記目的を達成するために本発明においては、ピックア
ップコイルタイプの回転信号発生器においてピックアッ
プコイルのコアをウイーガント効果素子とする。ライ−
ガント効果素子としては、例えば鉄−ニッケル合金から
なるワイヤをねじり加工を施こして加工硬化により内部
は柔かいが表層部（シェル）は硬い２重構造としたもの
が知られている。これにおいては、ワイヤ内部の保持力
は弱く、シェルは保持力が強い。したがって、これをピ
ックアップコイルコアとすると、永久磁石ロータの回転
によるコア印加磁界の変化に対してコア磁束の方向転換
が内部とシェルでタイミングが異なり、一方の層におけ
る磁束の方向転換時に鋭い立上りおよび立下りのパルス
電圧がコイルに誘起される。このパルス電圧の尖頭値は
ロータの回転速度にほとんど影響されず、また該パルス
電圧の周波数は外部磁界の変化、すなわち永久磁石ロー
タの回転に完全に同期している。したがって、低速度で
も定レベルの同期パルスが得られる。In order to achieve the above object, the present invention uses a pickup coil type rotational signal generator in which the core of the pickup coil is a Wiegand effect element. Rai-
A known Gantt effect element is one in which a wire made of, for example, an iron-nickel alloy is twisted and hardened to form a double structure in which the interior is soft but the surface layer (shell) is hard. In this, the retention force inside the wire is weak and the retention force in the shell is strong. Therefore, if this is used as a pickup coil core, the timing of the direction change of the core magnetic flux differs between the inside and the shell in response to changes in the magnetic field applied to the core due to the rotation of the permanent magnet rotor, and when the magnetic flux direction changes in one layer, there is a sharp rise and A falling pulse voltage is induced in the coil. The peak value of this pulse voltage is almost unaffected by the rotational speed of the rotor, and the frequency of the pulse voltage is completely synchronized with changes in the external magnetic field, ie, with the rotation of the permanent magnet rotor. Therefore, a constant level of synchronization pulses can be obtained even at low speeds.
本発明の好ましい実施例においては、ピックアップコイ
ルコアをライ−ガント効果を現わすアモーファス（ａｍ
ｏｒｐｂｏｕｓ ：非晶質）磁性体とし、しかも装着状
態において電気コイル装着が容易な直線状又は低曲率（
曲げ半径大）の湾曲状とする。これは、原形が直線状の
アモーファス磁性体ヲリング状又は渦巻状に巻回して熱
処理して巻回張力を抜いてその形状を常態とし、これを
直線状又は常態巻回の湾曲方向とは逆方向に低曲率湾曲
形状として装着する。これによれば、信号発生器を構成
した状態でピックアップコイルコアの一面には引張力が
作用し他面には圧縮力が作用して磁化保持力が異なり、
ライ−ガント効果が現われる。アモーファス磁性体は液
相金属を急冷して作らざるを得ないため薄板であり、し
かも磁気的には強磁性であって透磁率および飽和磁化が
大きく、保持力が小さく、機械的には破断強さがきわめ
て高く、弾力性および復元性に優れる。このようなアモ
ーファス磁性体は薄いためロータ磁束で飽和しやすく、
それに巻回した電気コイルにロータの回転に応じたライ
−ガント効果による電圧パルスを生じやすい。機械的に
は製造が簡単になり、耐振、耐衝撃性および反復再現性
が高い。In a preferred embodiment of the present invention, the pickup coil core is made of an amorphous (am
Orpbouus: Amorphous) magnetic material, and in addition, it has a straight or low curvature (
A curved shape with a large bending radius). This is done by winding an amorphous magnetic material whose original shape is straight into a ring shape or spiral shape, heat-treating it to remove the winding tension, and making it into its normal shape. It is installed as a low curvature curved shape. According to this, when a signal generator is configured, a tensile force acts on one side of the pickup coil core and a compressive force acts on the other side, resulting in different magnetization retention forces.
The Ley-Gandt effect appears. Amorphous magnetic materials must be made by rapidly cooling a liquid metal, so they are thin plates. Moreover, they are magnetically ferromagnetic, have high permeability and saturation magnetization, have low coercive force, and have low mechanical strength at break. It has extremely high elasticity and resilience. Because such amorphous magnetic materials are thin, they are easily saturated by the rotor magnetic flux.
The electric coil wound thereon tends to generate voltage pulses due to the Leigant effect in response to the rotation of the rotor. Mechanically, it is easier to manufacture and has high vibration and impact resistance and repeatability.
第１ａ図〜第１ｅ図に本発明の一実施例を示す。An embodiment of the present invention is shown in FIGS. 1a to 1e.
第１ａ図は縦断面図、第１ｂ図はＩＢ−ＩＢ線断面図、
第１Ｃ図はＩＣ−ＩＣ線断面図、第１ｄ図ばＴＤ−ＩＤ
線断面図、および第１ｅ図は底面図である。Figure 1a is a longitudinal sectional view, Figure 1b is a sectional view taken along the line IB-IB,
Figure 1C is a sectional view of IC-IC line, Figure 1d is TD-ID
The line sectional view and FIG. 1e are bottom views.
これらの図面において、ロータ１にはリング状の永久磁
石が固着されている。永久磁石２の側周面は、周方向に
Ｎ−８−Ｎ −８−−−一と１２極（Ｓ極６極、Ｎ極６
極）に分極磁化されている。ロータ１はケーシング３１
および３□にそれぞれ圧入された軸受４．および４□で
支持されている。この実施例は車輛速度センサとして用
いるため、ロータ１の一端１ａは変速機の出力軸に、他
端１ｂはスピードメータケーブルに結合する形状として
いる。永久磁石２の側周面近傍に直線状に強制したアモ
ーファス磁性体５が配置されている。アモーファス磁性
体５は、渦巻状に強制した５０μｍ厚のアモーファス薄
板を約３８０℃で一時間保持して渦巻状を常態とする形
状とし、これをコイルボビンの直線状およびスリット状
の穴に通し、しかも支持台９の直線状のスリット溝９に
通して直線状に強制したものであり、これによりアモー
ファス磁性体５の一方の面には引張力が、他方の面には
圧縮力が作用している。コイルボビンには５００ターン
の電気コイル６が巻回されている。In these drawings, a ring-shaped permanent magnet is fixed to the rotor 1. The side peripheral surface of the permanent magnet 2 has N-8-N-8--1 and 12 poles (6 S poles, 6 N poles) in the circumferential direction.
Pole) is polarized and magnetized. Rotor 1 has casing 31
and 3□ bearings press-fitted into 4. and 4□. Since this embodiment is used as a vehicle speed sensor, one end 1a of the rotor 1 is connected to an output shaft of a transmission, and the other end 1b is connected to a speedometer cable. An amorphous magnetic body 5 forced into a straight line is arranged near the side peripheral surface of the permanent magnet 2. The amorphous magnetic material 5 is made by forcing a 50-μm-thick amorphous thin plate into a spiral shape by holding it at about 380° C. for one hour to maintain the spiral shape, and then passing it through the linear and slit-shaped holes of the coil bobbin. It is forced into a straight line by passing it through the linear slit groove 9 of the support base 9, so that a tensile force is applied to one surface of the amorphous magnetic material 5 and a compressive force is applied to the other surface. . A 500-turn electric coil 6 is wound around the coil bobbin.
アモーファス磁性体５は、第２図に示す如く直線状を常
態とするもの５ａを第３図に示すように渦巻状としこれ
を低温熱処理して張力を抜いて渦巻状を常態形状とし、
更にコイルボビンおよび支持台９で直線状に強制したも
のであるので、第４ａ図に示すように、厚み中心面をほ
ぼ境界として一方の面には引張力Ｔが、他方の面には圧
縮力Ｃが作用している。その結果、磁気特性は、第４ｂ
図に２点鎖線ＢＨＴで示すように、引張力Ｔが作用して
いる面では飽和磁束密度が犬で保持力が犬となり、一点
鎖線ＢＨＯで示すように、圧縮力Ｃが作用している面で
は飽和磁束密度が小で保持力が小となっている。実線は
引張力も圧縮力も作用していない境界面の磁気特性を示
す。The amorphous magnetic material 5 has a normally linear shape 5a as shown in FIG. 2, but is made into a spiral shape as shown in FIG.
Furthermore, since the coil bobbin and the support 9 are forced into a straight line, as shown in Fig. 4a, a tensile force T is applied to one surface and a compressive force C is applied to the other surface, with the thickness center plane as the boundary. is working. As a result, the magnetic properties of the fourth b
As shown by the two-dot chain line BHT in the figure, the saturation magnetic flux density is 100% on the surface where the tensile force T is acting, and the holding force is 200% on the surface where the tensile force T is acting, and the surface on which the compressive force C is acting, as shown by the one-dot chain line BHO. The saturation magnetic flux density is small and the coercive force is small. The solid line shows the magnetic properties of the interface where neither tensile nor compressive forces are acting.
その結果、今ロータ１が回転して永久磁石２の、アモー
ファス磁性体５に及ｉ磁界が第５図に示すようにサイン
波状に変化すると、外部磁界強度が圧縮応力面の保持力
を越える時点に該面において一瞬に磁束の向きが反転し
、鋭いパルス電圧がコイル６に誘起される（ライ−ガン
ト効果）。この、アモーファス磁性体における磁束の反
転速度は、ロータ１の回転による磁束の増減速度に対し
て極端に速いので、このパルス電圧ピークはロータｌの
回転速度に実質上無関係と見なしうる一定値である。し
かし、永久磁石２の回転速度Ｌアモーファス磁性体５に
加わる磁界の振動とが一対一に対応し、しかも、該磁界
の振動の特定の位相のときのみ鋭い電圧パルスが誘起さ
れるので、電圧パルスの周波数はロータ１の回転速度に
比例し、低速域においてもこの比例関係がある。As a result, when the rotor 1 rotates and the magnetic field applied to the amorphous magnetic material 5 of the permanent magnet 2 changes in a sine wave shape as shown in Fig. 5, the external magnetic field strength exceeds the holding force of the compressive stress surface. The direction of the magnetic flux instantaneously reverses in this plane, and a sharp pulse voltage is induced in the coil 6 (Leigand effect). The reversal speed of the magnetic flux in this amorphous magnetic material is extremely faster than the increase/decrease speed of the magnetic flux due to the rotation of the rotor 1, so this pulse voltage peak is a constant value that can be considered to be virtually unrelated to the rotational speed of the rotor 1. . However, since there is a one-to-one correspondence between the rotation speed L of the permanent magnet 2 and the vibration of the magnetic field applied to the amorphous magnetic body 5, and a sharp voltage pulse is induced only at a specific phase of the vibration of the magnetic field, the voltage pulse The frequency is proportional to the rotational speed of the rotor 1, and this proportional relationship exists even in the low speed range.
したがって、電気コイル６に誘起されるパルスをタイミ
ングパルスとして用いうるし、それを増幅したり、その
パルス又は増幅パルスでモノマルチバイブレークラトリ
ガしてパルス幅を広げたり、あるいはパルスをカウント
して速度を検出したり、広幅処理したパルスｌ積分して
速度指示アナログ電圧を得るなど、従来公知の信号処理
で所望の処理を施こしうる。Therefore, the pulse induced in the electric coil 6 can be used as a timing pulse, it can be amplified, the pulse or amplified pulse can be used to trigger a mono-multivibrator to widen the pulse width, or the pulse can be counted to increase the speed. Desired processing can be performed using conventionally known signal processing, such as detecting or integrating pulses subjected to wide width processing to obtain a speed indicating analog voltage.
いずれにしても電気コイル６に誘起される電圧パルスは
シャープであり、そのレベルはロータ１の回転速度に実
質上依存せず、しかもその周波数はロータ１の回転速度
に比例する。したがって低速域において回転同期が正確
であって速度検出が正確となるという利点がある。また
、電気接点がなく、機械的には構造が簡単であって、耐
久性がきわめて高い。In any case, the voltage pulse induced in the electric coil 6 is sharp, its level does not substantially depend on the rotational speed of the rotor 1, and its frequency is proportional to the rotational speed of the rotor 1. Therefore, there is an advantage that rotational synchronization is accurate in the low speed range and speed detection is accurate. In addition, there are no electrical contacts, the structure is mechanically simple, and the durability is extremely high.
第１ａ図は本発明の一実施例の縦断面図、第１ｂ図はそ
のＴＢ−ＩＢ線断面図、第１ｃ図はＩＣ−ＩＣ線断面図
、第１ｄ図はＩＤ−ＩＤ線断面図、第１ｅ図は底面図で
ある。第２図、第３図および第４ａ図は、それぞれアモ
ーファス磁性体を示す拡大斜視図、側面図および斜視図
であり、第４ｂ図は第４ａ図に示すライ−ガント効果ア
モーファス磁性体５の磁気特性を示すグラフ、第５図は
アモーファス磁性体５に作用する磁界とコイル６に誘起
される電圧の相関を示すグラフである。
にロータ ２：永久磁石
３１．３□：ケーシング ４＋ ＋ ４２ ：軸受５
：アモーファス磁性体（ライ−ガント効果素子）６：
電気コイル ？、、７２：リード８：コネクタ
９：支持台
特開昭５８− １４０５８ （４）FIG. 1a is a longitudinal cross-sectional view of an embodiment of the present invention, FIG. 1b is a cross-sectional view taken along the line TB-IB, FIG. 1c is a cross-sectional view taken along the IC-IC line, FIG. 1d is a cross-sectional view taken along the ID-ID line, and FIG. Figure 1e is a bottom view. 2, 3, and 4a are an enlarged perspective view, a side view, and a perspective view showing the amorphous magnetic material, respectively, and FIG. 4b shows the magnetic field of the Ley-Gandt effect amorphous magnetic material 5 shown in FIG. 4a. A graph showing the characteristics, FIG. 5, is a graph showing the correlation between the magnetic field acting on the amorphous magnetic material 5 and the voltage induced in the coil 6. Rotor 2: Permanent magnet 31.3□: Casing 4+ + 42: Bearing 5
: Amorphous magnetic material (Leigandt effect element) 6:
Electric coil? ,,72: Lead 8: Connector
9: Support stand JP-A-58-14058 (4)
Claims (2)
石ロータ、永久磁石ロータの磁極に一部が対向するライ
−ガント効果素子およびライ−ガント効果素子に巻回さ
れた電気コイルを備える回転信号発生器。(1) A permanent magnet rotor in which N and S poles are alternately formed in the circumferential direction, a Leygandt effect element partially facing the magnetic poles of the permanent magnet rotor, and electricity wound around the Leygandt effect element. A rotation signal generator with a coil.
状等の湾曲形状を、常態とするアモーファス磁性体を直
線状９反湾曲形状等の一面に引張力が作用し他面に圧縮
力が作用する形状に強制したアモーファス磁性体である
前記特許請求の範囲第（１）項記載の回転信号発生器。 （３１電気コイルを巻回したコイルボビンに直線状に延
びたスリット状の開口を形成してそこにアモーファス磁
性体の一部を通し、該アモーファス磁性体の残部を直線
状のスリット溝に挿入した前記特許請求の範囲第（２）
項起載の回転信号発生器。(2) The Leigant effect element is an amorphous magnetic material that normally has a curved shape such as a ring shape or a spiral shape.A tensile force acts on one side of the amorphous magnetic material, such as a linear 9 anti-curved shape, and a compressive force acts on the other side. The rotational signal generator according to claim 1, which is an amorphous magnetic material forced into a shape. (31) A linearly extending slit opening is formed in the coil bobbin around which the electric coil is wound, a part of the amorphous magnetic material is passed through the opening, and the remaining part of the amorphous magnetic material is inserted into the linear slit groove. Claim No. (2)
Rotation signal generator listed in section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56112551A JPS5814058A (en) | 1981-07-17 | 1981-07-17 | Rotation signal generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56112551A JPS5814058A (en) | 1981-07-17 | 1981-07-17 | Rotation signal generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5814058A true JPS5814058A (en) | 1983-01-26 |
Family
ID=14589486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56112551A Pending JPS5814058A (en) | 1981-07-17 | 1981-07-17 | Rotation signal generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5814058A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63222217A (en) * | 1987-03-12 | 1988-09-16 | Toyota Autom Loom Works Ltd | Rotation detector in compressor |
-
1981
- 1981-07-17 JP JP56112551A patent/JPS5814058A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63222217A (en) * | 1987-03-12 | 1988-09-16 | Toyota Autom Loom Works Ltd | Rotation detector in compressor |
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