JPH06221807A - Noncontact throttle opening sensor - Google Patents
Noncontact throttle opening sensorInfo
- Publication number
- JPH06221807A JPH06221807A JP1087693A JP1087693A JPH06221807A JP H06221807 A JPH06221807 A JP H06221807A JP 1087693 A JP1087693 A JP 1087693A JP 1087693 A JP1087693 A JP 1087693A JP H06221807 A JPH06221807 A JP H06221807A
- Authority
- JP
- Japan
- Prior art keywords
- rotor magnet
- magnet
- throttle opening
- magnetoresistive element
- opening sensor
- 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- Withdrawn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
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は自動車のスロットル弁の
開度センサに係わり、特に非接触で開度を検出すること
の可能な非接触スロットル開度センサに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throttle valve opening sensor for an automobile, and more particularly to a non-contact throttle opening sensor capable of detecting the opening in a non-contact manner.
【０００２】[0002]
【従来の技術】近年自動車用エンジンに供給される空気
量を制御するためのスロットル弁の開度は、電子制御装
置を介してモータによって駆動されるものが多い。そし
てこの場合はスロットル弁開度はスロットル開度センサ
によって検出され電子制御装置にフィードバックされ
る。2. Description of the Related Art In recent years, the opening of a throttle valve for controlling the amount of air supplied to an automobile engine is often driven by a motor via an electronic control unit. In this case, the throttle valve opening is detected by the throttle opening sensor and fed back to the electronic control unit.
【０００３】そしてこの電子制御装置によって駆動され
るスロットル弁は従来のアクセルペダルと機械的にリン
クされたスロットル弁に比して動作回数が頻繁となるた
め、必然的にスロットル開度センサにも耐久性が要求さ
れることとなる。そこで耐久性を高めたスロットル開度
センサとして非接触で開度を検出するものが提案されて
おり、その１つとしてスロットル弁にリンクして回転す
る永久磁石の回転角度を磁気抵抗素子により検出する非
接触スロットル開度センサが提案されている。Since the throttle valve driven by this electronic control device operates more frequently than the conventional throttle valve mechanically linked to the accelerator pedal, it is inevitably durable to the throttle opening sensor. Sex will be required. Therefore, as a throttle opening sensor with improved durability, a sensor that detects the opening in a non-contact manner has been proposed. One of them is to detect the rotation angle of a permanent magnet that rotates by linking with a throttle valve by a magnetoresistive element. A non-contact throttle opening sensor has been proposed.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら上記形式
の非接触スロットル開度センサにあっては、回転磁界を
磁気抵抗素子だけで検出した場合は磁気抵抗素子の抵抗
変化は正弦波状となる。そこで磁気抵抗素子に重ねてバ
イアス磁石を設置するとともに、磁気抵抗素子でブリッ
ジを構成することにより検出特性の直線性を確保する必
要がある。However, in the non-contact throttle opening sensor of the above type, when the rotating magnetic field is detected only by the magnetoresistive element, the resistance change of the magnetoresistive element becomes sinusoidal. Therefore, it is necessary to install a bias magnet so as to overlap the magnetoresistive element and to ensure the linearity of the detection characteristic by forming a bridge with the magnetoresistive element.
【０００５】第６図は上記形式の非接触スロットル開度
センサの検出特性の１例図であって、横軸にロータ磁石
の回転角度を、縦軸にブリッジ電圧をとる。即ちバイア
ス磁石の無い場合は破線で示すようにブリッジ電圧は正
弦波となるが、バイアス磁石を設置することによりピー
ク電圧の発生角度を０°あるいは１８０゜方向に偏倚さ
せて中央部の特性を直線状にすることが可能となる。FIG. 6 is a diagram showing an example of the detection characteristics of the above-mentioned non-contact throttle opening sensor, in which the horizontal axis represents the rotation angle of the rotor magnet and the vertical axis represents the bridge voltage. That is, if there is no bias magnet, the bridge voltage becomes a sine wave as shown by the broken line, but by installing a bias magnet the peak voltage generation angle is biased in the 0 ° or 180 ° direction and the characteristics of the central part are linear. It is possible to make a shape.
【０００６】なお９０°の回転角でブリッジ電圧を０Ｖ
とするには、磁気抵抗素子で形成されるブリッジのバラ
ンスを調整することが必要となる。従って永久磁石、バ
イアス磁石および磁気抵抗素子相互の位置関係の誤差が
検出誤差として表れるだけでなく、検出特性の調整が困
難であるという問題点が生じる。The bridge voltage is 0V at a rotation angle of 90 °.
To achieve this, it is necessary to adjust the balance of the bridge formed by the magnetoresistive element. Therefore, not only an error in the positional relationship among the permanent magnet, the bias magnet, and the magnetoresistive element appears as a detection error, but also it is difficult to adjust the detection characteristics.
【０００７】本発明は上記問題点に鑑みなされたもので
あって、素子間の位置関係に起因する検出誤差を減少す
ることが可能な非接触スロットル開度センサ、および検
出特性の調整が容易な非接触スロットル開度センサを提
供することを目的とする。The present invention has been made in view of the above problems, and a non-contact throttle opening sensor capable of reducing a detection error due to a positional relationship between elements and an easy adjustment of a detection characteristic. An object is to provide a non-contact throttle opening sensor.
【０００８】[0008]
【課題を解決するための手段】第１の発明にかかる非接
触スロットル開度センサは、スロットル弁とリンクして
回転するロータ磁石と、ロータ磁石の回転による磁界の
変化を抵抗値の変化として検出するロータ磁石に近接し
かつ中心を一致させて配置される磁気抵抗素子と、磁気
抵抗素子に積み重ねて配置され固定方向のバイアス磁界
を発生するバイアス磁石と、ロータ磁石の中心に先端が
円錐状に成形された突起と、磁気抵抗素子の中心に前記
突起の先端の円錐と嵌合する凹部と、を具備する。A non-contact throttle opening sensor according to a first aspect of the present invention detects a rotor magnet that rotates by linking with a throttle valve and a change in magnetic field due to rotation of the rotor magnet as a change in resistance value. The magnetoresistive element that is arranged close to the rotor magnet and has its center aligned, the bias magnet that is stacked on the magnetoresistive element and that generates a bias magnetic field in the fixed direction, and the tip of the rotor magnet has a conical shape It has a molded protrusion and a concave portion that fits into the cone of the tip of the protrusion at the center of the magnetoresistive element.
【０００９】第２の発明にかかる非接触スロットル開度
センサは、スロットル弁とリンクして回転するロータ磁
石と、ロータ磁石の回転による磁界の変化を抵抗値の変
化として検出するロータ磁石に近接しかつ中心を一致さ
せて配置される磁気抵抗素子と、磁気抵抗素子に積み重
ねて配置され固定方向のバイアス磁界を発生するバイア
ス磁石と、を具備し、ロータ磁石をＮ極とＳ極とを対向
させた偏平円状に形成し対向するＮ極とＳ極との中心に
前記磁気抵抗素子およびバイアス磁石とを配設した非接
触スロットル開度センサ。A non-contact throttle opening sensor according to a second aspect of the present invention is close to a rotor magnet that rotates by linking with a throttle valve and a rotor magnet that detects a change in magnetic field due to rotation of the rotor magnet as a change in resistance value. And a bias magnet for stacking on the magnetoresistive element and generating a bias magnetic field in a fixed direction, the magnetoresistive element having the centers thereof aligned with each other. A non-contact throttle opening sensor in which the magnetoresistive element and the bias magnet are arranged in the center of an N pole and an S pole facing each other, which are formed in a flat circle shape.
【００１０】第３の発明にかかる非接触スロットル開度
センサは、スロットル弁とリンクして回転し中心に一方
の磁極が円周に沿って他の一方の磁極が着磁された半円
盤状のロータ磁石と、半円盤状のロータ磁石の円盤面に
平行に近接しかつ中心を一致させて配置される同心円状
に形成された磁気抵抗素子と、からなる。A non-contact throttle opening degree sensor according to a third aspect of the present invention is a semi-disc-shaped sensor in which one magnetic pole is magnetized along the circumference and one magnetic pole is magnetized around the center by rotating in association with a throttle valve. The rotor magnet and a magnetoresistive element formed in a concentric shape and arranged in parallel and close to the disk surface of the semi-disk-shaped rotor magnet and with their centers aligned with each other.
【００１１】[0011]
【作用】第１の発明にかかる非接触スロットル開度セン
サにあっては、磁気抵抗素子の裏面に取り付けられた凹
部とロータ磁石に取り付けられた円錐形状の突起とが嵌
合し、磁気抵抗素子とロータ磁石との間の平行が保持さ
れる。第２の発明にかかる非接触スロットル開度センサ
にあっては、ロータ磁石のＮ極とＳ極とが対向し、その
中心に磁気抵抗素子が設置されるため、ロータ磁石が偏
芯した場合にも磁気抵抗素子に作用する磁束密度は変化
しない。In the non-contact throttle opening sensor according to the first aspect of the present invention, the concave portion attached to the back surface of the magnetoresistive element and the conical protrusion attached to the rotor magnet are fitted to each other to form the magnetoresistive element. The parallelism between the rotor magnet and the rotor magnet is maintained. In the non-contact throttle opening degree sensor according to the second aspect of the present invention, since the N pole and the S pole of the rotor magnet are opposed to each other and the magnetoresistive element is installed at the center thereof, when the rotor magnet is eccentric. The magnetic flux density acting on the magnetoresistive element does not change.
【００１２】第３の発明にかかる非接触スロットル開度
センサにあっては、半円形のロータ磁石と同じく半円形
の磁気抵抗素子との重なり角度に比例して磁気抵抗素子
に抵抗値が変化する。In the non-contact throttle opening sensor according to the third aspect of the invention, the resistance value of the magnetoresistive element changes in proportion to the overlapping angle between the semicircular rotor magnet and the semicircular magnetoresistive element. .
【００１３】[0013]
【実施例】図１は第１の発明にかかる非接触スロットル
開度センサ１０の上面図およびＸ−Ｘ断面図であって、
スロットル弁（図示せず。）とリンクして回転する軸１
１にロータ磁石１２がネジ込まれている。ロータ磁石１
２の上面に近接した位置に、非接触スロットル開度セン
サ１０の前置増幅器（図示せず。）が組み込まれたハイ
ブリッドＩＣ基板１３が、非接触スロットル開度センサ
１０の筐体１４に対して固定支持される。1 is a top view and a sectional view taken along the line XX of a non-contact throttle opening sensor 10 according to the first invention.
Shaft 1 that rotates by linking with a throttle valve (not shown)
A rotor magnet 12 is screwed into the screw 1. Rotor magnet 1
The hybrid IC substrate 13 in which the preamplifier (not shown) of the non-contact throttle opening sensor 10 is installed at a position close to the upper surface of the non-contact throttle opening sensor 10 with respect to the housing 14 of the non-contact throttle opening sensor 10. Fixedly supported.
【００１４】そして基板１３上には軸１１の中心と中心
を一致させて磁気抵抗素子１５が、その上にはバイアス
磁石１６が設置される。図２は図１のＡ部の拡大図であ
って、ロータ磁石１２の中心には先端が円錐形状に成形
された突起１７が取り付けられ、基板１３の対向面には
この円錐と嵌合する窪みが形成された凹部１８が取り付
けられている。A magnetoresistive element 15 is provided on the substrate 13 with its center aligned with the center of the shaft 11, and a bias magnet 16 is provided thereon. FIG. 2 is an enlarged view of a portion A of FIG. 1, in which a protrusion 17 having a conical tip is attached to the center of the rotor magnet 12, and a recess that fits with this cone is formed on the opposing surface of the substrate 13. The recessed part 18 in which is formed is attached.
【００１５】そして突起１７と凹部１８とは磨耗し易い
材料で製作されている。従って、まず基板１３を筐体１
４に固定し、次にロータ磁石１２および突起１７が取り
付けられた軸１１を突起１７と凹部１８とが完全に嵌合
するまで筐体１４のスリーブ部１９に差し込むことによ
り、磁気抵抗素子１５とロータ磁石１２とを正確な平行
状態を維持して組み立てることが可能となる。The protrusions 17 and the recesses 18 are made of a material that easily wears. Therefore, first, the substrate 13 is attached to the housing 1.
4 and then insert the shaft 11 to which the rotor magnet 12 and the protrusion 17 are attached into the sleeve portion 19 of the housing 14 until the protrusion 17 and the recess 18 are completely fitted together. It is possible to assemble the rotor magnet 12 while maintaining an accurate parallel state.
【００１６】そしてロータ磁石１２を例えば検査段階で
数回回転させることにより突起１７と凹部１８とは磨耗
し、実際の使用状態でロータの回転が妨げられることは
ない。図３は第２の発明にかかる非接触スロットル開度
センサの主要部の正面図であって、磁気抵抗素子１５お
よびバイアス磁石１６は基板１３の裏面に設置される。By rotating the rotor magnet 12 several times, for example, in the inspection stage, the projections 17 and the recesses 18 are abraded and the rotation of the rotor is not hindered in the actual use condition. FIG. 3 is a front view of the main part of the non-contact throttle opening sensor according to the second aspect of the invention, in which the magnetoresistive element 15 and the bias magnet 16 are installed on the back surface of the substrate 13.
【００１７】回転軸１１と共に回転するロータ磁石１２
の両極には略Ｕ字形の高透磁率材１２１および１２２が
取り付けられる。従ってロータ磁石１２によって発生さ
れる磁束は空気中では、相対向する高透磁率材１２１お
よび１２２との間でほぼ平行直線状に形成される。そし
てこの磁束中に磁気抵抗素子１５とバイアス磁石１６と
が設置されることとなる。A rotor magnet 12 which rotates together with the rotating shaft 11.
Substantially U-shaped high-permeability materials 121 and 122 are attached to both electrodes. Therefore, the magnetic flux generated by the rotor magnet 12 is formed in the air in a substantially parallel straight line between the high magnetic permeability materials 121 and 122 facing each other in the air. Then, the magnetoresistive element 15 and the bias magnet 16 are installed in this magnetic flux.
【００１８】図４は第２の発明にかかる非接触スロット
ル開度センサの主要部の上面図であって、ロータ磁石１
２の回転中心が磁気抵抗素子１５およびバイアス磁石１
６の中心から偏芯した場合にも磁気抵抗素子１５を横切
る磁束量は変化せず、偏芯による誤差の発生が防止され
る。なお略Ｕ字形の高透磁率材１２１および１２２を対
向面に向かう程大とすることにより、より大なる偏芯に
対しても対応可能となる。FIG. 4 is a top view of a main portion of the non-contact throttle opening sensor according to the second invention, which shows the rotor magnet 1
The rotation center of 2 is the magnetoresistive element 15 and the bias magnet 1.
Even when decentered from the center of 6, the amount of magnetic flux crossing the magnetoresistive element 15 does not change, and an error due to decentering is prevented. It should be noted that by making the substantially U-shaped high magnetic permeability materials 121 and 122 larger toward the facing surfaces, it is possible to cope with a larger eccentricity.
【００１９】またロータ磁石１２自体をＮ極とＳ極とが
対向する偏平円状に形成してもよいことは明らかであ
る。第１および第２の発明にかかる非接触スロットル開
度センサはロータ磁石１２と磁気抵抗素子１５およびバ
イアス磁石１６との設置位置関係に起因する検出誤差を
減少することは可能となるが、いずれもセンサの検出特
性を調整する際の工数を低減することはできない。Further, it is obvious that the rotor magnet 12 itself may be formed in a flat circular shape in which the N pole and the S pole face each other. Although the non-contact throttle opening sensor according to the first and second aspects of the present invention can reduce the detection error due to the positional relationship between the rotor magnet 12, the magnetic resistance element 15, and the bias magnet 16, both of them are possible. It is not possible to reduce the number of man-hours when adjusting the detection characteristics of the sensor.
【００２０】即ち４つの磁気抵抗素子をブリッジに構成
し、ブリッジのバランスを調整する必要がある。図５は
第３の発明の発明にかかる非接触スロットル開度センサ
の斜視図であって、磁気抵抗素子をブリッジを構成する
ことなく検出直線性を確保することの可能な非接触スロ
ットル開度センサを示す。That is, it is necessary to configure the four magnetoresistive elements in a bridge and adjust the balance of the bridge. FIG. 5 is a perspective view of a non-contact throttle opening sensor according to a third aspect of the present invention, which is a non-contact throttle opening sensor capable of ensuring detection linearity without forming a bridge of magnetic resistance elements. Indicates.
【００２１】回転軸１１の先端に取り付けられた半円板
状のロータ磁石１２は、中心部にＮ極が円周に沿ってＳ
極が着磁されている。従ってロータ磁石の極く近傍にお
いては磁束は一点鎖線１２３で示すように放射線状に形
成されている。一方磁気抵抗素子１５も同じく半円板状
かつ同心円状に形成され、ロータ磁石に極く近接して平
行に配置される。The semi-disk shaped rotor magnet 12 attached to the tip of the rotary shaft 11 has an N pole at the center along the circumference of the rotor magnet S.
The poles are magnetized. Therefore, in the very vicinity of the rotor magnet, the magnetic flux is formed in a radial shape as shown by the alternate long and short dash line 123. On the other hand, the magnetoresistive element 15 is also formed in a semicircular plate shape and a concentric circular shape, and is arranged in parallel with and very close to the rotor magnet.
【００２２】そしてロータ磁石１２が回転し磁気抵抗素
子１５と重なり合うと、重なり合った部分のロータ磁石
１２の発生する磁束が磁気抵抗素子１５をほぼ直角に横
切り抵抗値を変化させる。従ってロータ磁石１２と磁気
抵抗素子１５とが重なり合う角度と抵抗の変化量は比例
することとなるため、磁気抵抗素子１５の抵抗変化を電
圧あるいは電流の変化として取り出すことにより回転角
度を検出することが可能となる。When the rotor magnet 12 rotates and overlaps with the magnetoresistive element 15, the magnetic flux generated by the overlapped portion of the rotor magnet 12 crosses the magnetoresistive element 15 at a substantially right angle and changes the resistance value. Therefore, the angle at which the rotor magnet 12 and the magnetoresistive element 15 overlap is proportional to the amount of change in resistance, and therefore the rotational angle can be detected by extracting the change in resistance of the magnetoresistive element 15 as a change in voltage or current. It will be possible.
【００２３】即ち第３の発明にかかる非接触スロットル
開度センサにあっては、重なり角度が０°の位置と１８
０°の位置との間で磁気抵抗素子１５の抵抗は直線的に
変化することは構造的に保証され特別な調整は必要ない
だけでなく、バイアス磁石も必要でないため構造的にも
簡略化することが可能となる。That is, in the non-contact throttle opening degree sensor according to the third aspect of the present invention, the overlap angle is set to 0 ° and 18
It is structurally ensured that the resistance of the magnetoresistive element 15 linearly changes between the position of 0 ° and no special adjustment is required, and a bias magnet is not required, which simplifies the structure. It becomes possible.
【００２４】[0024]
【発明の効果】第１の発明にかかる非接触スロットル開
度センサにあっては、センサ組立の際にロータ磁石に取
り付けられた突起と磁気抵抗素子に取り付けられた凹部
とが嵌合して、ロータ磁石と磁気抵抗素子の相対的な位
置を一義的に決定することが可能となる。In the non-contact throttle opening degree sensor according to the first aspect of the present invention, the protrusion attached to the rotor magnet and the recess attached to the magnetoresistive element are fitted to each other when the sensor is assembled. It is possible to uniquely determine the relative position of the rotor magnet and the magnetoresistive element.
【００２５】第２の発明にかかる非接触スロットル開度
センサにあっては、ロータ磁石の両極を対向せしめその
中に磁気抵抗素子およびバイアス磁石を設置することに
より、ロータ磁石の回転中心が偏芯した場合にも検出誤
差が発生することを抑制することが可能となる。第３の
発明にかかる非接触スロットル開度センサにあっては、
円板状のロータ磁石と磁気抵抗素子との重なり角度に比
例して磁気抵抗素子の抵抗値が変化し、かつバイアス磁
石を使用する必要がないため検出特性の調整が容易にな
る。In the non-contact throttle opening sensor according to the second aspect of the present invention, the rotor magnet is eccentrically centered by placing the magnetoresistive element and the bias magnet in the two poles of the rotor magnet facing each other. Even in such a case, it is possible to suppress the occurrence of a detection error. In the non-contact throttle opening sensor according to the third invention,
Since the resistance value of the magnetoresistive element changes in proportion to the overlapping angle between the disk-shaped rotor magnet and the magnetoresistive element, and since it is not necessary to use a bias magnet, the detection characteristics can be easily adjusted.
【図１】図１は第１の発明にかかる非接触スロットル開
度センサの上面図および断面図である。FIG. 1 is a top view and a cross-sectional view of a non-contact throttle opening sensor according to a first aspect of the invention.
【図２】図２は第１の発明にかかる非接触スロットル開
度センサのＡ部拡大図である。FIG. 2 is an enlarged view of part A of the non-contact throttle opening sensor according to the first invention.
【図３】図３は第２の発明にかかる非接触スロットル開
度センサの主要部の正面図である。FIG. 3 is a front view of a main part of a non-contact throttle opening sensor according to a second invention.
【図４】図４は第２の発明にかかる非接触スロットル開
度センサの主要部の上面図である。FIG. 4 is a top view of a main part of the non-contact throttle opening sensor according to the second invention.
【図５】図５は第３の発明にかかる非接触スロットル開
度センサの主要部の斜視図である。FIG. 5 is a perspective view of a main part of a non-contact throttle opening sensor according to a third invention.
【図６】図６は非接触スロットル開度センサの検出特性
図である。FIG. 6 is a detection characteristic diagram of a non-contact throttle opening sensor.
１０…非接触スロットル開度センサ １１…回転軸 １２…ロータ磁石 １３…基板 １４…筐体 １５…磁気抵抗素子 １６…バイアス磁石 １７…突起 １８…凹部 １９…スリーブ 10 ... Non-contact throttle opening sensor 11 ... Rotating shaft 12 ... Rotor magnet 13 ... Substrate 14 ... Housing 15 ... Magnetoresistive element 16 ... Bias magnet 17 ... Protrusion 18 ... Recess 19 ... Sleeve
Claims (3)
タ磁石と、 該ロータ磁石の回転による磁界の変化を抵抗値の変化と
して検出するロータ磁石に近接しかつ中心を一致させて
配置される磁気抵抗素子と、 該磁気抵抗素子に積み重ねて配置され固定方向のバイア
ス磁界を発生するバイアス磁石と、から構成される非接
触スロットル開度センサであって、 前記ロータ磁石の中心に先端が円錐状に成形された突起
と、 磁気抵抗素子の中心に前記突起の先端の円錐と嵌合する
凹部と、を具備する非接触スロットル開度センサ。1. A rotor magnet that is rotated by linking with a throttle valve, and a magnetic resistor that is arranged close to and centered with a rotor magnet that detects a change in magnetic field due to rotation of the rotor magnet as a change in resistance value. A non-contact throttle opening degree sensor comprising a magnetic element and a bias magnet which is stacked on the magnetoresistive element and generates a bias magnetic field in a fixed direction, the tip of which is shaped like a cone at the center of the rotor magnet. Non-contact throttle opening sensor, which comprises: a protrusion formed on the magnetoresistive element;
タ磁石と、 該ロータ磁石の回転による磁界の変化を抵抗値の変化と
して検出するロータ磁石に近接しかつ中心を一致させて
配置される磁気抵抗素子と、 該磁気抵抗素子に積み重ねて配置され固定方向のバイア
ス磁界を発生するバイアス磁石と、から構成される非接
触スロットル開度センサであって、 前記ロータ磁石をＮ極とＳ極とを対向させた偏平円状に
形成し、対向するＮ極とＳ極との中心に前記磁気抵抗素
子およびバイアス磁石とを配設した非接触スロットル開
度センサ。2. A rotor magnet that rotates by linking with a throttle valve, and a magnetic resistance that is arranged close to and centered with a rotor magnet that detects a change in magnetic field due to rotation of the rotor magnet as a change in resistance value. A non-contact throttle opening sensor comprising: an element; and a bias magnet that is stacked on the magnetoresistive element to generate a bias magnetic field in a fixed direction, wherein the rotor magnet has north and south poles opposed to each other. A non-contact throttle opening degree sensor which is formed in a flattened circular shape and in which the magnetoresistive element and the bias magnet are arranged at the centers of the N and S poles facing each other.
に一方の磁極が円周に沿って他の一方の磁極が着磁され
た半円盤状のロータ磁石と、 該半円盤状のロータ磁石の円盤面に平行に近接しかつ中
心を一致させて配置される同心円状に形成された磁気抵
抗素子と、からなる非接触スロットル開度センサ。3. A semi-disk rotor magnet that rotates in association with a throttle valve and has one magnetic pole centered around the other magnetic pole, and a semi-disk rotor magnet. A non-contact throttle opening sensor including a concentric magnetoresistive element which is arranged in parallel with and close to the disk surface of the disk.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1087693A JPH06221807A (en) | 1993-01-26 | 1993-01-26 | Noncontact throttle opening sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1087693A JPH06221807A (en) | 1993-01-26 | 1993-01-26 | Noncontact throttle opening sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06221807A true JPH06221807A (en) | 1994-08-12 |
Family
ID=11762539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1087693A Withdrawn JPH06221807A (en) | 1993-01-26 | 1993-01-26 | Noncontact throttle opening sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06221807A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001159542A (en) * | 1999-12-03 | 2001-06-12 | Hitachi Metals Ltd | Rotation angle sensor and rotation angle sensor unit |
| JP2001304805A (en) * | 2000-04-25 | 2001-10-31 | Tokai Rika Co Ltd | Detecting device for rotational angle |
| US7582372B2 (en) | 2002-11-29 | 2009-09-01 | Keihin Corporation | Pressure regulator for fuel cell |
-
1993
- 1993-01-26 JP JP1087693A patent/JPH06221807A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001159542A (en) * | 1999-12-03 | 2001-06-12 | Hitachi Metals Ltd | Rotation angle sensor and rotation angle sensor unit |
| JP4543350B2 (en) * | 1999-12-03 | 2010-09-15 | 日立金属株式会社 | Rotation angle sensor and rotation angle sensor unit |
| JP2001304805A (en) * | 2000-04-25 | 2001-10-31 | Tokai Rika Co Ltd | Detecting device for rotational angle |
| US7582372B2 (en) | 2002-11-29 | 2009-09-01 | Keihin Corporation | Pressure regulator for fuel cell |
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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: 20000404 |