JPH11264739A - Rotation detector - Google Patents
Rotation detectorInfo
- Publication number
- JPH11264739A JPH11264739A JP10066852A JP6685298A JPH11264739A JP H11264739 A JPH11264739 A JP H11264739A JP 10066852 A JP10066852 A JP 10066852A JP 6685298 A JP6685298 A JP 6685298A JP H11264739 A JPH11264739 A JP H11264739A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic material
- thickness
- elastic
- rotation detector
- elastic magnetic
- 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.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
- F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
- F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
- F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
- F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
- F16C19/185—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with two raceways provided integrally on a part other than a race ring, e.g. a shaft or housing
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、回転体の回転数を
計測する回転検出器技術に関する。The present invention relates to a rotation detector technology for measuring the number of rotations of a rotating body.
【０００２】[0002]
【従来の技術】回転検出器は自動車のアンチロックブレ
ーキシステム（ＡＢＳ）などにおいてタイヤの回転数を
検出し、安全を確保するための重要な分野に応用され
る。このような分野においては、ブレーキによる発熱で
１５０℃近い環境で用いられることがある。このような
回転検出器としては、従来多極着磁させた磁石を内輪に
嵌合固定する技術（例えば特開平７−７１４４９号公報
記載の技術）が提案されている。図１にその例を示す。
この図は従来技術に係る回転検出計の断面図である。符
号１はベアリングシール、１ａは内輪であるスリンガ
ー、２は磁気粉体を含む弾性部材で多極着磁されてい
る。この弾性部材２に対応する箇所に磁気センサー３が
配されている。2. Description of the Related Art A rotation detector is applied to an important field for detecting the number of rotations of a tire in an anti-lock brake system (ABS) of an automobile and ensuring safety. In such a field, it is sometimes used in an environment near 150 ° C. due to heat generated by a brake. As such a rotation detector, a technique of fitting and fixing a multipolar magnetized magnet to an inner race (for example, a technique described in JP-A-7-71449) has been conventionally proposed. FIG. 1 shows an example.
This figure is a cross-sectional view of a conventional rotation detector. Reference numeral 1 denotes a bearing seal, 1a denotes a slinger serving as an inner ring, and 2 denotes an elastic member containing magnetic powder, which is multipolar magnetized. A magnetic sensor 3 is arranged at a position corresponding to the elastic member 2.
【０００３】一方、他の従来技術として、ホイールベア
リングシール周上に磁性体を配設し、ＮＳの磁極を交互
に多極着磁させた技術（特開平５−７１４４９号公報記
載の技術など）が知られている。図２にその例を示す。
外輪１２、内輪１３、及びホイール１４によりホイール
ベアリングが形成されている。この内輪１３にＮＳの磁
極を交互に多極着磁させた弾性磁性体１７が配設されて
いる。この弾性磁性体１７の回転により発生する磁気的
パルスはセンサー１８により検出される。このような弾
性磁性体はゴムやゴム質の合成樹脂（例えばポリアミ
ド、ポリオレフィン、エチレン系共重合体等）と磁性粉
末（例えばバリウムフェライト、希土類磁性粉末等）と
を均一に混練して得られる複合磁性材料をリング状に成
形したものである。上記のような回転検出計は、弾性磁
性体の使用によって、大幅な小型化、軽量化が可能とな
り、特に自動車の分野への実用化が進められている。On the other hand, as another conventional technique, a magnetic body is arranged around the periphery of a wheel bearing seal and the NS magnetic poles are alternately multipolar magnetized (the technique described in Japanese Patent Application Laid-Open No. 5-71449). It has been known. FIG. 2 shows an example.
A wheel bearing is formed by the outer ring 12, the inner ring 13, and the wheel 14. The inner ring 13 is provided with an elastic magnetic body 17 in which NS magnetic poles are alternately multipolar magnetized. The magnetic pulse generated by the rotation of the elastic magnetic body 17 is detected by the sensor 18. Such an elastic magnetic material is a composite obtained by uniformly kneading a rubber or a rubbery synthetic resin (eg, polyamide, polyolefin, ethylene copolymer, etc.) and a magnetic powder (eg, barium ferrite, rare earth magnetic powder, etc.). The magnetic material is formed into a ring shape. The rotation detector as described above can be significantly reduced in size and weight by using an elastic magnetic material, and its practical application particularly in the field of automobiles is being promoted.
【０００４】しかしながら、これら弾性磁性体を用いる
回転検出計の寒冷地での使用を考えると、例えば国内に
おける屋外使用の場合−３５〜−４０℃、さらに外国
（北米等）での屋外使用を想定すると更なる低温領域に
おける耐寒性が求められる。しかしながら、現状の弾性
磁性体では低温領域に晒され、常温に戻した際の磁力
は、元の磁力に比べ低下することが判った。磁力の低下
は回転検出の正確さ・確実さに影響を及ぼす。従ってこ
のような弾性磁性体を用いる回転検出計の応用として、
寒冷地の安全運転確保の重要な鍵となるＡＢＳ分野への
実用化が困難となることが判った。However, considering the use of a rotation detector using these elastic magnetic materials in a cold region, for example, in the case of outdoor use in Japan, it is assumed to be -35 to -40 ° C., and further, in a foreign country (North America, etc.). Then, cold resistance in a further low temperature region is required. However, it has been found that the current elastic magnetic material is exposed to a low temperature region, and the magnetic force when the temperature is returned to room temperature is lower than the original magnetic force. The decrease in magnetic force affects the accuracy and reliability of rotation detection. Therefore, as an application of a rotation detector using such an elastic magnetic material,
It turned out that practical application to the ABS field, which is an important key for ensuring safe driving in cold regions, would be difficult.
【０００５】[0005]
【発明が解決しようとする課題】本発明は、上記した従
来の問題点を改善する、すなわち、寒冷地での低温暴露
によっても、正確で、かつ、信頼性の高い回転検出器を
提供することを目的とする。SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional problems, that is, to provide an accurate and reliable rotation detector even at low temperature exposure in a cold region. With the goal.
【０００６】[0006]
【課題を解決するための手段】ここで本発明者等は、低
温に晒された後でも充分な磁力を得るため、弾性磁性体
の大型化の検討を行った。しかしながら、この方法で
は、検出計全体の大型化、重量化を来すのは当然であ
り、また検討の結果、弾性磁性体の大型化により、むし
ろ低温によるその磁力低下がさらに大きくなることを見
出し、本発明に至った。すなわち、本発明の回転検出器
は上記課題を解決するため、請求項１に記載の通り、厚
さが１．５ｍｍ以下の弾性磁性材料を有する回転検出器
である。In order to obtain a sufficient magnetic force even after being exposed to a low temperature, the present inventors have studied the size of the elastic magnetic material. However, this method naturally increases the size and weight of the entire detector, and as a result of the investigation, it has been found that the reduction in the magnetic force due to the low temperature is further increased due to the increase in the size of the elastic magnetic material. This has led to the present invention. That is, in order to solve the above problem, the rotation detector of the present invention is a rotation detector having an elastic magnetic material having a thickness of 1.5 mm or less, as described in claim 1.
【０００７】[0007]
【発明の実施の形態】本発明の回転検出器において、弾
性磁性材料は厚さが１．５ｍｍ以下である必要がある。
すなわち厚さが１．５ｍｍ超であると、本発明の効果が
得られず、−４０℃付近の低温に晒されることにより、
弾性磁性材料の磁力の減少が大きくなり、測定不可能に
なったり、あるいは測定値の信頼性が低下する。なお、
弾性磁性材料の厚さが１．２ｍｍ以下であると磁力の減
少がほとんどなくなるため好ましい。ここで、厚さが
０．８ｍｍ以下では磁力の減少が全くなくなるため、
０．８ｍｍ以下の厚さの弾性磁性材料を用いることがさ
らに好ましい。なお、このように薄い弾性磁性材料を用
いる副次効果として、極めてコンパクトで軽量な回転検
出器とすることができるため、軽量化が特に求められる
自動車等車両分野に最適である。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the rotation detector of the present invention, the elastic magnetic material needs to have a thickness of 1.5 mm or less.
That is, if the thickness is more than 1.5 mm, the effects of the present invention cannot be obtained, and by being exposed to a low temperature around -40 ° C,
The decrease in the magnetic force of the elastic magnetic material becomes large, making measurement impossible, or reducing the reliability of the measured value. In addition,
It is preferable that the thickness of the elastic magnetic material be 1.2 mm or less, because the magnetic force hardly decreases. Here, when the thickness is 0.8 mm or less, the magnetic force does not decrease at all.
More preferably, an elastic magnetic material having a thickness of 0.8 mm or less is used. In addition, as a secondary effect of using such a thin elastic magnetic material, an extremely compact and lightweight rotation detector can be provided, and therefore, it is most suitable for a vehicle field such as an automobile, which requires particularly light weight.
【０００８】なお、厚さを必要以上に薄くすると、回転
検出に必要な磁力が得られず、正確な測定が困難とな
る。後述する磁性付与材料の含有量及び磁気センサの種
類・感度にもよるが一般に０．４ｍｍ以上であることが
望ましい。If the thickness is made thinner than necessary, a magnetic force required for rotation detection cannot be obtained, and accurate measurement becomes difficult. Although it depends on the content of the magnetic material to be described later and the type and sensitivity of the magnetic sensor, it is generally desirable that the thickness be 0.4 mm or more.
【０００９】なお、弾性磁性材料を後述する磁性付与材
料とともに構成するマトリックスの成分（以下「マトリ
ックス成分」と云う）としてはアクリルゴム系エラスト
マー、フッ素ゴム系エラストマー、シリコーン系エラス
トマー等耐熱性に優れたものであることが好ましい。す
なわち、これらは耐熱性が高いため、自動車の車輪での
ブレーキによる発熱の影響を受けるような自動車等のＡ
ＢＳ分野においても好適に用い得る。なお、これらのう
ち、本発明の回転検出器で用いる弾性磁性材料のように
薄さが求められる分野においては、耐久性、加工性を考
慮するとアクリルゴム系エラストマーを用いることが望
ましい。なお上記マトリックス成分には、エラストマー
の他に、必要に応じ、架橋剤、架橋助剤、充填剤、顔
料、老化防止剤、酸化防止剤、各種改質剤などの成分が
配されているThe matrix component (hereinafter referred to as "matrix component") constituting the elastic magnetic material together with the magnetic material to be described later is excellent in heat resistance such as acrylic rubber-based elastomer, fluorine rubber-based elastomer and silicone-based elastomer. Preferably, it is That is, since these have high heat resistance, A of automobiles and the like that are affected by heat generated by braking on the wheels of the automobile are used.
It can also be suitably used in the BS field. Among these, in a field where thinness is required, such as an elastic magnetic material used in the rotation detector of the present invention, it is desirable to use an acrylic rubber-based elastomer in consideration of durability and workability. Note that, in addition to the elastomer, components such as a crosslinking agent, a crosslinking aid, a filler, a pigment, an antioxidant, an antioxidant, and various modifiers are arranged in the matrix component, if necessary.
【００１０】また、これら弾性材料に磁性を付加して弾
性磁性材料を構成するための磁性付与材料としてはフェ
ライトであることが好ましい。すなわち、バリウムフェ
ライトあるいはストロンチウムフェライトなどのフェラ
イトによれば充分な磁力密度が得られる上、同様に用い
得る磁性材料、例えばサマリウムコバルト、あるいはネ
オジム鉄ボロンなどと比して、安価である上に耐食性が
極めて高いため、自動車等のＡＢＳ分野で問題となるお
それのある融雪剤による腐食促進効果に対しても問題が
なく、従って、長期間に亘って正確・確実な速度検知が
可能となる。なお、フェライトの含有量としては、必要
な磁力、及び、弾性磁性材料強度によって調整するが通
常７０重量％以上９３重量％以下である。[0010] Ferrite is preferably used as a magnetizing material for forming an elastic magnetic material by adding magnetism to these elastic materials. In other words, a ferrite such as barium ferrite or strontium ferrite can provide a sufficient magnetic force density, and is inexpensive and corrosion resistant compared to similarly usable magnetic materials such as samarium cobalt or neodymium iron boron. Since it is extremely high, there is no problem with respect to the effect of accelerating corrosion caused by the snow melting agent which may be a problem in the ABS field of automobiles and the like, and therefore, accurate and reliable speed detection can be performed for a long period of time. The content of ferrite is adjusted depending on the required magnetic force and the strength of the elastic magnetic material, but is usually 70% by weight or more and 93% by weight or less.
【００１１】上記のようなマトリックス成分に粉末状の
磁性付与剤を加え、公知の方法により混合・混練して、
その後架橋させ、加工を加えて本発明の回転検出器に用
い得る弾性磁性材料とする。なお、間隔を規制した一対
の加熱ローラーの間を通しながら架橋させることによ
り、所定の厚さのシートを得ることができ、このシート
を打ち抜きなどの機械的手段により本発明の回転検出器
に用い得る１．５ｍｍ以下の厚さの弾性磁性材料を容易
に得ることができる。次いで、この弾性磁性材料を着磁
する。これは多極着磁ヨーク等の一般的な着磁手段によ
り行う。この着磁はＮ極とＳ極を交互に配するよう行う
ことにより、回転検出器の検出精度・信頼性を向上させ
ることができる。[0011] A powdery magnetism-imparting agent is added to the above matrix component, and mixed and kneaded by a known method.
After that, it is crosslinked and processed to obtain an elastic magnetic material that can be used for the rotation detector of the present invention. In addition, a sheet having a predetermined thickness can be obtained by crosslinking while passing between a pair of heating rollers having a regulated interval, and the sheet is used for the rotation detector of the present invention by mechanical means such as punching. The obtained elastic magnetic material having a thickness of 1.5 mm or less can be easily obtained. Next, the elastic magnetic material is magnetized. This is performed by a general magnetizing means such as a multi-pole magnetized yoke. By performing the magnetization such that the N pole and the S pole are alternately arranged, the detection accuracy and reliability of the rotation detector can be improved.
【００１２】[0012]
【実施例】以下に本発明の回転検出器について具体的に
説明する。まず、アクリルゴム系エラストマーからなる
マトリックス成分１００重量部及びストロンチウムフェ
ライト７３０重量部（全体に対し重量比で８８重量％）
を均一になるよう混合し、厚さ１．５ｍｍのシートが得
られるように間隔を調整した一対の加熱ローラーの間を
通して、シート状の弾性磁性材料を得た。また、同様に
して、ただしローラー間隔を変えて、厚さ２ｍｍ、１．
２ｍｍ及び０．８ｍｍのシート状の弾性磁性材料を得
た。これらを外径７ｃｍ、内径６ｃｍのリング状に打ち
抜き、１００極の多極着磁ヨークによりＮ極とＳ極を交
互に配するよう着磁させた（図３にそのイメージ図を示
す）。これらリング状弾性磁性材料の磁力をそれぞれ５
箇所測定した。次いでこれら４種のリング状弾性磁性材
料を図１に示す回転検出器に取り付け、これら回転検出
器を、自動車等ＡＢＳ分野への応用、特に寒冷地での使
用を想定して、−４０℃（屋外寒冷を想定）および１５
０℃（ブレーキによる発熱を想定）の雰囲気温度の間を
周期的に変化するよう設定された環境下で、実際に回転
検出実験を行った。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The rotation detector of the present invention will be specifically described below. First, 100 parts by weight of a matrix component composed of an acrylic rubber-based elastomer and 730 parts by weight of strontium ferrite (88% by weight based on the whole)
Was mixed so as to be uniform, and passed through a pair of heating rollers whose intervals were adjusted so that a sheet having a thickness of 1.5 mm was obtained, to obtain a sheet-like elastic magnetic material. In the same manner, except that the distance between the rollers was changed, the thickness was 2 mm, 1.
Sheet-shaped elastic magnetic materials of 2 mm and 0.8 mm were obtained. These were punched out into a ring shape having an outer diameter of 7 cm and an inner diameter of 6 cm, and were magnetized by a multi-pole magnetized yoke having 100 poles so that N poles and S poles were alternately arranged (an image is shown in FIG. 3). The magnetic force of each of these ring-shaped elastic magnetic materials is 5
Measurements were taken at points. Next, these four kinds of ring-shaped elastic magnetic materials are attached to the rotation detector shown in FIG. 1, and these rotation detectors are used at -40 ° C. Outdoor cold) and 15
A rotation detection experiment was actually performed in an environment set to periodically change between ambient temperatures of 0 ° C. (assuming heat generated by a brake).
【００１３】その結果、厚さ２ｍｍのリング状弾性磁性
材料を用いた回転検出器の測定値が実際の回転値と異な
る値を示すようになったため、その時点でこれら回転検
出実験を中止し、回転検出器のリング状弾性磁性材料の
解析を行った。その結果得られた、実験開始前のこれら
リング状弾性磁性材料の磁力を１００としたときの回転
検出実験後のこれらの磁力の関係を図４に示す。As a result, the measured value of the rotation detector using the ring-shaped elastic magnetic material having a thickness of 2 mm shows a value different from the actual rotation value. At that time, the rotation detection experiment was stopped. The ring-shaped elastic magnetic material of the rotation detector was analyzed. FIG. 4 shows the relationship between the obtained magnetic forces after the rotation detection experiment when the magnetic force of these ring-shaped elastic magnetic materials before the start of the experiment was set to 100.
【００１４】図４により、厚さ２ｍｍのリング状弾性磁
性材料における磁力の減少が著しく大きく、厚さ１．５
ｍｍのリング状弾性磁性材料ではその磁力の減少は殆ど
なく、また厚さ０．８ｍｍのリング状弾性磁性材料では
磁力の減少がないことが判った。FIG. 4 shows that the reduction of the magnetic force in the ring-shaped elastic magnetic material having a thickness of 2 mm is remarkably large,
It was found that the magnetic force hardly decreased in the ring-shaped elastic magnetic material having a thickness of 0.8 mm, and that the magnetic force did not decrease in the ring-shaped elastic magnetic material having a thickness of 0.8 mm.
【００１５】なお、上記におけるアクリルゴム系エラス
トマーを主な成分とするマトリックス成分１００重量部
の代わりに一液型ＲＴＶシリコーンを主な成分として有
するマトリックス成分１００重量部を用いて同様に検討
を行ったところ、図３と同様の結果が得られた。The same examination was conducted by using 100 parts by weight of a matrix component having one-component RTV silicone as a main component instead of 100 parts by weight of a matrix component having an acrylic rubber-based elastomer as a main component. However, the same result as in FIG. 3 was obtained.
【００１６】上記においては、幅の狭いリング状弾性磁
性材料を用い、その側面の磁力を磁気センサで検知する
タイプの回転検出器についての例を示したが、本発明
は、他の形状例えば図５のように幅の広いリング状弾性
磁性材料を用い、この周上の磁力を件するするタイプの
回転検出器においても実施可能であり、本発明の範囲に
含まれる。In the above description, an example was given of a rotation detector of a type in which a ring-shaped elastic magnetic material having a small width is used, and the magnetic force on the side surface is detected by a magnetic sensor. The present invention can be applied to a rotation detector of a type using a ring-shaped elastic magnetic material having a wide width as shown in FIG.
【００１７】[0017]
【発明の効果】本発明の回転検出器は、実際の自動車等
ＡＢＳの回転検出器として用いるに充分な信頼性・耐性
を有する優れた回転検出器である。The rotation detector of the present invention is an excellent rotation detector having sufficient reliability and durability to be used as a rotation detector of an actual vehicle such as an ABS.
【図１】従来の回転検出器の他の例を示す図である。FIG. 1 is a diagram showing another example of a conventional rotation detector.
【図２】従来の回転検出器及び実施例で用いた回転検出
器の構造を示す図である。FIG. 2 is a diagram showing a structure of a conventional rotation detector and a rotation detector used in an embodiment.
【図３】実施例で作成したリング状弾性磁性材料のイメ
ージを示す図である。FIG. 3 is a diagram showing an image of a ring-shaped elastic magnetic material prepared in an example.
【図４】実施例で作成したリング状弾性磁性材料の回転
検出実験における前後の磁力の変化を示す図である。FIG. 4 is a diagram showing a change in magnetic force before and after in a rotation detection experiment of a ring-shaped elastic magnetic material created in an example.
【図５】リング状弾性磁性材料の他の形状を示す図であ
る。FIG. 5 is a view showing another shape of the ring-shaped elastic magnetic material.
１ ベアリングシール １ａ スリンガー ２ 磁気粉体を含む弾性部材 １２ 外輪 １３ 内輪 １４ ホイール １７ 弾性磁性体 １８ センサー DESCRIPTION OF SYMBOLS 1 Bearing seal 1a Slinger 2 Elastic member containing magnetic powder 12 Outer ring 13 Inner ring 14 Wheel 17 Elastic magnetic body 18 Sensor
Claims (3)
有することを特徴とする回転検出器。1. A rotation detector comprising an elastic magnetic material having a thickness of 1.5 mm or less.
ラストマー、フッ素ゴム系エラストマー、シリコーン系
エラストマーのうちから選ばれた１種以上をマトリック
スの主な成分としてなるものであることを特徴とする請
求項１に記載の回転検出器。2. The matrix according to claim 2, wherein the elastic magnetic material comprises at least one selected from an acrylic rubber-based elastomer, a fluororubber-based elastomer, and a silicone-based elastomer as a main component of the matrix. Item 7. A rotation detector according to Item 1.
ェライトであることを特徴とする請求項１または請求項
２に記載の回転検出器。3. The rotation detector according to claim 1, wherein the magnetism imparting material in the elastic magnetic material is ferrite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10066852A JPH11264739A (en) | 1998-03-17 | 1998-03-17 | Rotation detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10066852A JPH11264739A (en) | 1998-03-17 | 1998-03-17 | Rotation detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11264739A true JPH11264739A (en) | 1999-09-28 |
Family
ID=13327808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10066852A Withdrawn JPH11264739A (en) | 1998-03-17 | 1998-03-17 | Rotation detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11264739A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001143931A (en) * | 1999-11-15 | 2001-05-25 | Uchiyama Mfg Corp | Method for magnetizing magnetic rubber ring |
| JP2001242187A (en) * | 2000-03-01 | 2001-09-07 | Ntn Corp | Magnetic encoder, bearing for wheel, and method for manufacturing magnetic encoder |
| EP1245958A3 (en) * | 2001-03-28 | 2003-12-17 | Ntn Corporation | Rolling bearing with rotation sensor |
| EP1408311A1 (en) * | 2001-06-19 | 2004-04-14 | Koyo Seiko Co., Ltd. | Magnetic member for revolution detector |
| JP2005315782A (en) * | 2004-04-30 | 2005-11-10 | Nsk Ltd | Magnetic encoder and roller bearing equipped with the same |
| JP2006330004A (en) * | 2006-09-01 | 2006-12-07 | Ntn Corp | Magnetic encoder and bearing for wheel equipped with the same |
| CN110873851A (en) * | 2018-08-31 | 2020-03-10 | 国仪量子(合肥)技术有限公司 | Magnetic field measurement system and magnetic field measurement method |
-
1998
- 1998-03-17 JP JP10066852A patent/JPH11264739A/en not_active Withdrawn
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001143931A (en) * | 1999-11-15 | 2001-05-25 | Uchiyama Mfg Corp | Method for magnetizing magnetic rubber ring |
| JP4498506B2 (en) * | 1999-11-15 | 2010-07-07 | 内山工業株式会社 | Magnetic rubber ring magnetizing method |
| JP2001242187A (en) * | 2000-03-01 | 2001-09-07 | Ntn Corp | Magnetic encoder, bearing for wheel, and method for manufacturing magnetic encoder |
| EP1245958A3 (en) * | 2001-03-28 | 2003-12-17 | Ntn Corporation | Rolling bearing with rotation sensor |
| US6916118B2 (en) | 2001-03-28 | 2005-07-12 | Ntn Corporation | Rolling bearing with rotation sensor |
| EP1408311A4 (en) * | 2001-06-19 | 2006-01-18 | Koyo Seiko Co | Magnetic member for revolution detector |
| EP1408311A1 (en) * | 2001-06-19 | 2004-04-14 | Koyo Seiko Co., Ltd. | Magnetic member for revolution detector |
| JP2005315782A (en) * | 2004-04-30 | 2005-11-10 | Nsk Ltd | Magnetic encoder and roller bearing equipped with the same |
| JP4682532B2 (en) * | 2004-04-30 | 2011-05-11 | 日本精工株式会社 | Magnetic encoder and manufacturing method thereof, and rolling bearing provided with the magnetic encoder |
| JP2006330004A (en) * | 2006-09-01 | 2006-12-07 | Ntn Corp | Magnetic encoder and bearing for wheel equipped with the same |
| JP4498330B2 (en) * | 2006-09-01 | 2010-07-07 | Ｎｔｎ株式会社 | Magnetic encoder and wheel bearing provided with the same |
| CN110873851A (en) * | 2018-08-31 | 2020-03-10 | 国仪量子(合肥)技术有限公司 | Magnetic field measurement system and magnetic field measurement method |
| CN110873851B (en) * | 2018-08-31 | 2021-08-20 | 国仪量子(合肥)技术有限公司 | Magnetic field measurement system and magnetic field measurement method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20050607 |