JP2009300396A - Rotation angle detecting device - Google Patents

Rotation angle detecting device Download PDF

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JP2009300396A
JP2009300396A JP2008158328A JP2008158328A JP2009300396A JP 2009300396 A JP2009300396 A JP 2009300396A JP 2008158328 A JP2008158328 A JP 2008158328A JP 2008158328 A JP2008158328 A JP 2008158328A JP 2009300396 A JP2009300396 A JP 2009300396A
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rotation angle
rotation
calculated
detection device
sine wave
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Shinji Hatanaka
真二 畑中
Kenji Takeda
武田　　憲司
Shigetoshi Fukaya
深谷　　繁利
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Denso Corp
Soken Inc
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Denso Corp
Nippon Soken Inc
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
    • G01D5/145—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the relative movement between the Hall device and magnetic fields
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D2205/00—Indexing scheme relating to details of means for transferring or converting the output of a sensing member
    • G01D2205/20—Detecting rotary movement
    • G01D2205/22—Detecting rotary movement by converting the rotary movement into a linear movement
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D2205/00—Indexing scheme relating to details of means for transferring or converting the output of a sensing member
    • G01D2205/20—Detecting rotary movement
    • G01D2205/26—Details of encoders or position sensors specially adapted to detect rotation beyond a full turn of 360°, e.g. multi-rotation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D2205/00—Indexing scheme relating to details of means for transferring or converting the output of a sensing member
    • G01D2205/20—Detecting rotary movement
    • G01D2205/28—The target being driven in rotation by additional gears

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotation angle detecting device which determines any abnormality in a computed rotation angle with simple configuration. <P>SOLUTION: This rotation angle detecting device 1 is provided with: a signal output device 13; and a rotation angle operational equipment 14. The signal output device 13 outputs two sine wave signals different in phase by 90 degrees each other depending on rotation of a rotary shaft 10. The rotation angle operational equipment 14 computes the rotation angle from these two sine wave signals. There is a correspondence relation between the two sine wave signals and the rotation angle, and therefore, the rotation angle is determined to be normal or not by previously-setting this relationship as an expected value to compare those two sine wave signals and the rotation angle with this expected value. Thus the rotation angle is computed, while detecting any abnormality in the computed rotation angle is detected in a simple configuration. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、対象物の回転角度を検出する回転角度検出装置に関する。   The present invention relates to a rotation angle detection device that detects a rotation angle of an object.

従来、対象物の回転角度を検出する回転角度検出装置として、例えば特許文献１に開示されている回転角度センサがある。この回転角度センサは、円板状の磁石と、２つ〜４つの磁気センサとから構成されている。磁気センサは、磁石に対して所定位置に配置され、磁石の回転に伴って変化する磁界の強さに応じた信号を出力する。そして、これらの磁気センサの出力信号から、所定の演算方法に基づいて回転角度を算出する。
特開２００３−７５１０８号公報 Conventionally, as a rotation angle detection device that detects the rotation angle of an object, for example, there is a rotation angle sensor disclosed in Patent Document 1. This rotation angle sensor is composed of a disk-shaped magnet and two to four magnetic sensors. The magnetic sensor is disposed at a predetermined position with respect to the magnet, and outputs a signal corresponding to the strength of the magnetic field that changes as the magnet rotates. Then, the rotation angle is calculated from the output signals of these magnetic sensors based on a predetermined calculation method.
JP 2003-75108 A

しかし、前述した回転角度センサでは、磁気センサの異常を判定することができない。そのため、算出した回転角度が正常か否かを判定できないという問題があった。   However, the rotation angle sensor described above cannot determine the abnormality of the magnetic sensor. Therefore, there has been a problem that it cannot be determined whether or not the calculated rotation angle is normal.

本発明は、このような事情に鑑みてなされたものであり、算出した回転角度の異常を簡素な構成で判定することができる回転角度検出装置を提供することを目的とする。   The present invention has been made in view of such circumstances, and an object of the present invention is to provide a rotation angle detection device capable of determining an abnormality of a calculated rotation angle with a simple configuration.

課題を解決するための手段及び発明の効果Means for Solving the Problems and Effects of the Invention

そこで、本発明者は、この課題を解決すべく鋭意研究し試行錯誤を重ねた結果、信号出力手段の出力する２つの正弦波信号と、これらから算出した回転角度とを、予め設定された期待値と比較することで、算出した回転角度が正常か否かを判定できることを思いつき、本発明を完成するに至った。   Therefore, as a result of intensive research and trial and error to solve this problem, the present inventor has set two expected sine wave signals output from the signal output means and the rotation angle calculated from them as preset expectations. The inventors have come up with the idea that it is possible to determine whether or not the calculated rotation angle is normal by comparing with the value, and the present invention has been completed.

すなわち、請求項１に記載の回転角度検出装置は、回転体と、回転体の回転角度に応じて振幅がともに単調増加又は単調減少する、回転角度に応じた互いに同位相及び逆位相でない２つの正弦波信号を出力する信号出力手段と、２つの正弦波信号に基づいて回転角度を算出し、２つの正弦波信号と算出した回転角度とを予め設定された期待値と比較することで、算出した回転角度が正常か否かを判定する回転角度演算手段と、を有することを特徴とする。この構成によれば、２つの正弦波信号に基づいて回転角度を算出することができる。また、２つの正弦波信号と回転角度との間には対応関係がある。そのため、この対応関係を期待値として予め設定しておき、２つの正弦波信号と回転角度とをこの期待値と比較することで、回転角度が正常か否かを判定することができる。従って、回転角度を算出するとともに、算出した回転角度の異常を判定することができる。しかも、２つの正弦波信号と回転角度とを予め設定された期待値と比較するだけで判定できるため、構成を簡素化することができる。   In other words, the rotation angle detection device according to claim 1 includes two components whose amplitudes are monotonously increased or decreased monotonously according to the rotation angle of the rotator and that are not in phase and opposite phases according to the rotation angle. Calculate by calculating the rotation angle based on the signal output means for outputting the sine wave signal and the two sine wave signals, and comparing the two sine wave signals and the calculated rotation angle with preset expected values. Rotation angle calculating means for determining whether the rotation angle is normal or not. According to this configuration, the rotation angle can be calculated based on the two sine wave signals. There is also a correspondence between the two sine wave signals and the rotation angle. Therefore, it is possible to determine whether or not the rotation angle is normal by setting this correspondence as an expected value in advance and comparing the two sine wave signals and the rotation angle with the expected value. Accordingly, it is possible to calculate the rotation angle and determine the abnormality of the calculated rotation angle. In addition, the configuration can be simplified because the two sine wave signals and the rotation angle can be determined simply by comparing with the preset expected value.

請求項２に記載の回転角度検出装置は、請求項１に記載の回転角度検出装置において、期待値は、２つの正弦波信号に含まれる誤差成分に基づいて求められる許容範囲を有し、回転角度演算手段は、２つの正弦波信号と算出した回転角度とを許容範囲を有する期待値と比較することで、算出した回転角度が正常であるか否かを判定することを特徴とする。この構成によれば、２つの正弦波信号に含まれる誤差成分の影響を抑え、算出した回転角度の異常を精度よく判定することができる。   The rotation angle detection device according to claim 2 is the rotation angle detection device according to claim 1, wherein the expected value has an allowable range determined based on an error component included in the two sine wave signals, The angle calculation means is characterized by determining whether or not the calculated rotation angle is normal by comparing the two sine wave signals and the calculated rotation angle with an expected value having an allowable range. According to this configuration, it is possible to suppress the influence of the error component included in the two sine wave signals and accurately determine the abnormality of the calculated rotation angle.

請求項３に記載の回転角度検出装置は、請求項２に記載の回転角度検出装置において、 回転角度演算手段は、２つの正弦波信号に基づいて１回転内の回転角度を算出するとともに、２つの正弦波信号の少なくともいずれかの振幅に基づいて回転回数を算出し、算出した１回転内の回転角度及び回転回数に基づいて回転角度を算出し、許容範囲は、算出した回転回数に基づいて求められることを特徴とする。この構成によれば、１回転内の回転角度は、回転角度に応じた２つの正弦波信号から三角関数演算によって算出することができる。２つの正弦波信号の振幅は、回転体の回転角度に応じて単調増加又は単調減少している。そのため、２つの正弦波信号の少なくともいずれかの振幅に基づいて回転回数を算出することができる。従って、１回転内の回転角度及び回転回数に基づいて多回転に渡って回転角度を算出することができる。また、２つの正弦波信号に含まれる誤差成分の影響は、算出した回転回数に表れる。そのため、算出した回転回数に基づいて許容範囲を求めることで、２つの正弦波信号に含まれる誤差成分の影響を確実に抑えることができる。   The rotation angle detection device according to claim 3 is the rotation angle detection device according to claim 2, wherein the rotation angle calculation means calculates a rotation angle within one rotation based on two sine wave signals, and 2 The number of rotations is calculated based on the amplitude of at least one of the two sine wave signals, the rotation angle is calculated based on the calculated rotation angle and the number of rotations within one rotation, and the allowable range is based on the calculated number of rotations. It is required. According to this configuration, the rotation angle within one rotation can be calculated from two sine wave signals corresponding to the rotation angle by trigonometric function calculation. The amplitudes of the two sinusoidal signals monotonously increase or monotonously decrease depending on the rotation angle of the rotating body. Therefore, the number of rotations can be calculated based on the amplitude of at least one of the two sine wave signals. Accordingly, the rotation angle can be calculated over multiple rotations based on the rotation angle and the number of rotations within one rotation. The influence of the error component included in the two sine wave signals appears in the calculated number of rotations. Therefore, by determining the allowable range based on the calculated number of rotations, it is possible to reliably suppress the influence of error components included in the two sine wave signals.

請求項４に記載の回転角度検出装置は、請求項１〜３のいずれか１項に記載の回転角度検出装置において、信号出力手段は、回転体に固定され、回転体の回転軸心近傍において回転軸心に直交し、回転軸心方向に大きさが単調増加又は単調減少する磁束を発生する磁石と、回転体の回転に伴って回転体を回転軸心方向に変位させる変位手段と、回転軸心の近傍に、感磁方向が、回転軸心に対して直交方向であって、互いに異なる方向となるように配置される２つの磁束密度検出手段と、を有することを特徴とする。この構成によれば、回転体の回転角度に応じて振幅がともに単調増加又は単調減少する、回転体の回転に応じた互いに同位相及び逆位相でない２つの正弦波信号を確実に出力することができる。   The rotation angle detection device according to claim 4 is the rotation angle detection device according to any one of claims 1 to 3, wherein the signal output means is fixed to the rotation body, and in the vicinity of the rotation axis of the rotation body. A magnet that generates a magnetic flux that is perpendicular to the axis of rotation and monotonously increases or decreases in the direction of the axis of rotation, a displacement means that displaces the rotor in the direction of the axis of rotation as the rotor rotates, and rotation In the vicinity of the shaft center, there are two magnetic flux density detecting means arranged so that the magnetic sensing direction is a direction orthogonal to the rotational axis and different from each other. According to this configuration, it is possible to reliably output two sine wave signals whose amplitudes are monotonously increased or decreased monotonously according to the rotation angle of the rotator and which are not in phase and opposite phase according to the rotation of the rotator. it can.

請求項５に記載の回転角度検出装置は、請求項４に記載の回転角度検出装置において、磁石は、回転軸心の回りに配置され、回転軸心を挟んで対向する磁極を有することを特徴とする。この構成によれば、回転体の回転軸心近傍において回転軸心に直交する磁束を確実に発生することができる。   The rotation angle detection device according to claim 5 is the rotation angle detection device according to claim 4, wherein the magnet has a magnetic pole disposed around the rotation axis and opposed to the rotation axis. And According to this configuration, it is possible to reliably generate a magnetic flux orthogonal to the rotation axis in the vicinity of the rotation axis of the rotating body.

請求項６に記載の回転角度検出装置は、請求項５に記載の回転角度検出装置において、 磁石は、回転軸心に対して直交方向の磁極間の距離が回転軸心方向に向かうに従って単調増加又は単調減少することを特徴とする。この構成によれば、回転体の回転軸心近傍において、回転軸心方向に大きさが単調増加又は単調減少する磁束を確実に発生することができる。   The rotation angle detection device according to claim 6 is the rotation angle detection device according to claim 5, wherein the magnet monotonously increases as the distance between the magnetic poles in the direction orthogonal to the rotation axis is directed toward the rotation axis. Or, it decreases monotonously. According to this configuration, it is possible to reliably generate a magnetic flux whose size increases or decreases monotonously in the direction of the rotation axis in the vicinity of the rotation axis of the rotating body.

請求項７に記載の回転角度検出装置は、請求項１〜６のいずれか１項に記載の回転角度検出装置において、回転体は、ハウジングに回転可能に支持され、変位手段は、回転体とハウジングとの間に配設されるねじ機構であることを特徴とする。この構成によれば、回転体を回転軸心方向に確実に変位させることができる。   The rotation angle detection device according to claim 7 is the rotation angle detection device according to any one of claims 1 to 6, wherein the rotation body is rotatably supported by the housing, and the displacement means includes the rotation body and the rotation body. It is a screw mechanism disposed between the housing and the housing. According to this configuration, the rotating body can be reliably displaced in the direction of the rotation axis.

請求項８に記載の回転角度検出装置は、請求項１〜７のいずれか１項に記載の回転角度検出装置において、信号出力手段は、磁石の外周側を包囲し、磁路の一部を構成する筒状のヨークを有することを特徴とする。この構成によれば、外部からの磁気的影響を抑えることができる。   The rotation angle detection device according to claim 8 is the rotation angle detection device according to any one of claims 1 to 7, wherein the signal output means surrounds the outer peripheral side of the magnet, and a part of the magnetic path is provided. It has the cylindrical yoke which comprises. According to this structure, the magnetic influence from the outside can be suppressed.

請求項９に記載の回転角度検出装置は、請求項８に記載の回転角度検出装置において、 ヨークは、回転体に一体的に形成されていることを特徴とする。この構成によれば、部品点数を削減しコストを抑えることができる。   The rotation angle detection device according to claim 9 is the rotation angle detection device according to claim 8, wherein the yoke is formed integrally with the rotating body. According to this configuration, the number of parts can be reduced and the cost can be suppressed.

次に、実施形態を挙げ、本発明をより詳しく説明する。本実施形態では、多回転、つまり０度〜３６０度の範囲だけでなく、３６０度を超える回転角度をも検出できる回転角度検出装置について説明する。   Next, the present invention will be described in more detail with reference to embodiments. In the present embodiment, a rotation angle detection device capable of detecting not only a multi-rotation, that is, a rotation angle exceeding 360 degrees, but also a range of 0 degrees to 360 degrees will be described.

まず、図１〜図１０を参照して回転角度検出装置の構成及び動作について説明する。ここで、図１は、本実施形態における回転角度検出装置の軸方向断面図である。図２は、図１におけるギア周辺のＡ−Ａ矢視断面図である。図３は、図１における信号出力装置周辺の拡大図である。図４は、図２における信号出力装置周辺の拡大図である。図５は、変位装置の動作を説明するための軸方向断面図である。図６は、磁気検出素子の出力波形である。図７は、Ｖ１、Ｖ２と回転角度θの関係を示すグラフである。図８は、図７に対して許容範囲εを追加したグラフである。図９は、図８の一部を拡大したグラフである。図１０は、算出した回転回数ｎを示すグラフである。なお、図中における上下方向は、回転角度検出装置を説明するために便宜的に導入したものである。   First, the configuration and operation of the rotation angle detection device will be described with reference to FIGS. Here, FIG. 1 is a sectional view in the axial direction of the rotation angle detection device in the present embodiment. FIG. 2 is a cross-sectional view of the gear periphery in FIG. FIG. 3 is an enlarged view of the periphery of the signal output device in FIG. FIG. 4 is an enlarged view of the periphery of the signal output device in FIG. FIG. 5 is an axial cross-sectional view for explaining the operation of the displacement device. FIG. 6 shows an output waveform of the magnetic detection element. FIG. 7 is a graph showing the relationship between V1 and V2 and the rotation angle θ. FIG. 8 is a graph in which an allowable range ε is added to FIG. FIG. 9 is an enlarged graph of a part of FIG. FIG. 10 is a graph showing the calculated number of rotations n. In addition, the up-down direction in the figure is introduced for convenience in order to explain the rotation angle detection device.

図１〜図４に示すように、回転角度検出装置１は、回転軸１０と、ギア１１と、ギア１２（回転体）と、信号出力装置１３（信号出力手段）と、回転角度演算装置１４（回転角度演算手段）とから構成されている。   As shown in FIGS. 1 to 4, the rotation angle detection device 1 includes a rotation shaft 10, a gear 11, a gear 12 (rotary body), a signal output device 13 (signal output means), and a rotation angle calculation device 14. (Rotation angle calculation means).

回転軸１０は、ハウジング１５に回転可能に支持され、回転角度を検出する対象物（図略）に連結されて、対象物とともに回転する部材である。   The rotating shaft 10 is a member that is rotatably supported by the housing 15, is connected to an object (not shown) that detects a rotation angle, and rotates together with the object.

ギア１１は、回転軸１０に固定され、回転軸１０とともに回転する円板状の部材である。ギア１２は、ギア１１と噛合し、ギア１１の回転に伴って回転する円筒状の部材である。ギア１２は、後述するスリーブ１３２１を介してハウジング１５に回転可能に支持されている。ギア１１とギア１２のギア比ＧＲは、ギア１１が１回転するとギア１２が２回転するように設定されている。   The gear 11 is a disk-shaped member that is fixed to the rotating shaft 10 and rotates together with the rotating shaft 10. The gear 12 is a cylindrical member that meshes with the gear 11 and rotates as the gear 11 rotates. The gear 12 is rotatably supported by the housing 15 via a sleeve 1321 described later. The gear ratio GR between the gear 11 and the gear 12 is set so that when the gear 11 rotates once, the gear 12 rotates twice.

信号出力装置１３は、ギア１１の回転角度θに応じた互いに同位相及び逆位相でない２つの正弦波信号を出力する装置である。信号出力装置１３は、磁石１３０と、ヨーク１３１と、変位装置１３２（変位手段）と、磁気検出素子１３３、１３４とから構成されている。   The signal output device 13 is a device that outputs two sine wave signals that are not in phase and opposite phase according to the rotation angle θ of the gear 11. The signal output device 13 includes a magnet 130, a yoke 131, a displacement device 132 (displacement means), and magnetic detection elements 133 and 134.

磁石１３０は、ギア１２の回転軸心Ｍの近傍において回転軸心Ｍに直交する磁束Φを発生するフェライトからなる円筒状の部材である。ヨーク１３１は、磁石１３０の外周側を包囲し、磁路の一部を構成する磁性体からなる円筒状の部材である。ヨーク１３１は、ギア１２の内周に一体的に形成されている。磁石１３０は、ヨーク１３１の内周面に固定されている。磁石１３０の内周面は、回転軸心Ｍの下方から上方に向かうに従って拡径するように、テーパ状に成形されている。つまり、回転軸心Ｍに対して直交方向の内周面間の距離が、回転軸心Ｍの下方から上方に向かうに従って単調増加するように成形されている。磁石１３０の内周面には、Ｎ極及びＳ極が、回転軸心Ｍを挟んで互いに対向するように着磁されている。これにより、矢印で示すように、回転軸心Ｍの近傍において、回転軸心Ｍに直交し、回転軸心Ｍの下方から上方に向かうに従って単調減少する磁束Φが発生する。   The magnet 130 is a cylindrical member made of ferrite that generates a magnetic flux Φ orthogonal to the rotation axis M in the vicinity of the rotation axis M of the gear 12. The yoke 131 is a cylindrical member made of a magnetic material that surrounds the outer periphery of the magnet 130 and forms a part of the magnetic path. The yoke 131 is integrally formed on the inner periphery of the gear 12. The magnet 130 is fixed to the inner peripheral surface of the yoke 131. The inner peripheral surface of the magnet 130 is formed in a tapered shape so that its diameter increases from the lower side of the rotation axis M toward the upper side. In other words, the distance between the inner peripheral surfaces in the direction orthogonal to the rotation axis M is formed so as to monotonously increase from the lower side to the upper side of the rotation axis M. On the inner peripheral surface of the magnet 130, the N pole and the S pole are magnetized so as to face each other with the rotation axis M interposed therebetween. As a result, as indicated by an arrow, a magnetic flux Φ that is orthogonal to the rotation axis M and decreases monotonously from the lower side to the upper side of the rotation axis M is generated in the vicinity of the rotation axis M.

変位装置１３２は、回転軸１０の回転に伴って、ギア１２を回転軸心Ｍの方向、つまり上下方向に変位させる装置である。変位装置１３２は、ギア１２の外周面に形成される雄ねじ部１３２０（ねじ機構）と、スリーブ１３２１とから構成されている。スリーブ１３２１は、ハウジング１５に固定され、ギア１２を回転可能に支持する円弧板状の部材である。スリーブ１３２１の内周面には、ギア１２の雄ねじ部１３２０に螺合する雌ねじ部１３２２（ねじ機構）が形成されている。   The displacement device 132 is a device that displaces the gear 12 in the direction of the rotation axis M, that is, in the vertical direction as the rotation shaft 10 rotates. The displacement device 132 includes a male screw portion 1320 (screw mechanism) formed on the outer peripheral surface of the gear 12 and a sleeve 1321. The sleeve 1321 is an arcuate plate-like member that is fixed to the housing 15 and rotatably supports the gear 12. On the inner peripheral surface of the sleeve 1321, a female screw portion 1322 (screw mechanism) that is screwed into the male screw portion 1320 of the gear 12 is formed.

磁気検出素子１３３、１３４は、磁石１３０、１３１の内側であって、回転軸心Ｍの近傍に配置され、磁束密度を検出し対応する信号を出力する素子である。具体的にはホールＩＣである。磁気検出素子１３３、１３４は、回転軸心Ｍの近傍であって、軸方向の同一位置に配置されている。また、感磁方向が、回転軸心Ｍに対して直交方向であって、互いに異なる方向となるように配置されている。具体的には、それぞれの感磁方向のなす角度が周方向に９０度になるように配置されている。磁気検出素子１３３、１３４は、このように配置された状態で支持部材１６にそれぞれ固定されている。磁気検出素子１３３、１３４は、回転軸１０の回転に伴って、それぞれの感磁方向の磁束密度に応じた信号Ｖ１、Ｖ２を出力する。   The magnetic detection elements 133 and 134 are elements that are disposed inside the magnets 130 and 131 and in the vicinity of the rotation axis M, and detect a magnetic flux density and output a corresponding signal. Specifically, it is a Hall IC. The magnetic detection elements 133 and 134 are arranged in the vicinity of the rotation axis M and at the same position in the axial direction. Further, the magnetic sensing directions are arranged so as to be orthogonal to the rotation axis M and different directions. Specifically, they are arranged so that the angle formed by the respective magnetic sensing directions is 90 degrees in the circumferential direction. The magnetic detection elements 133 and 134 are fixed to the support member 16 in the state of being arranged in this way. The magnetic detection elements 133 and 134 output signals V <b> 1 and V <b> 2 corresponding to the magnetic flux densities in the respective magnetic sensing directions as the rotary shaft 10 rotates.

図５に示すように、回転軸１０が回転すると、ギア１１に噛合したギア１２が回転する。ギア１２の雄ねじ部１３２０は、スリーブ１３２１の雌ねじ部１３２２に螺合しているため、ギア１２は、回転に伴って回転軸心Ｍの下方に向かって変位する。ところで、図３及び図４に示すように、磁石１３０は、前述したように、回転軸心Ｍに直交し、回転軸心Ｍの下方から上方に向かうに従って単調減少する磁束Φを発生している。そのため、磁気検出素子１３３、１３４は、回転軸１０の回転に伴って、図６及び数１に示すように、振幅が回転角度θに伴って変化するｆ（θ）で同一であり、位相が９０度異なる回転角度θに応じた正弦波信号を出力する。

Figure 2009300396
As shown in FIG. 5, when the rotating shaft 10 rotates, the gear 12 meshed with the gear 11 rotates. Since the male screw portion 1320 of the gear 12 is screwed into the female screw portion 1322 of the sleeve 1321, the gear 12 is displaced downward of the rotation axis M with rotation. 3 and 4, the magnet 130 generates the magnetic flux Φ that is orthogonal to the rotational axis M and monotonously decreases from the lower side to the upper side of the rotational axis M as described above. . Therefore, as shown in FIG. 6 and Equation 1, the magnetic detection elements 133 and 134 have the same amplitude f (θ) whose phase changes with the rotation angle θ as the rotation shaft 10 rotates, and the phase is the same. A sine wave signal corresponding to a rotation angle θ different by 90 degrees is output.
Figure 2009300396

図１及び図２に示す回転角度演算装置１４は、２つの正弦波信号Ｖ１、Ｖ２に基づいて回転角度θを算出するマイクロコンピュータからなる装置である。また、算出した回転角度θが正常か否かを判定する装置でもある。回転角度演算装置１４は、磁気検出素子１３３、１３４の出力信号Ｖ１、Ｖ２をデータに変換し、数２に示すように、逆正接演算によってギア１２の１回転内の回転角度θ１を算出する。

Figure 2009300396
The rotation angle calculation device 14 shown in FIGS. 1 and 2 is a device composed of a microcomputer that calculates the rotation angle θ based on two sine wave signals V1 and V2. Further, it is also a device that determines whether or not the calculated rotation angle θ is normal. The rotation angle calculation device 14 converts the output signals V1 and V2 of the magnetic detection elements 133 and 134 into data, and calculates the rotation angle θ1 within one rotation of the gear 12 by arctangent calculation as shown in Equation 2.
Figure 2009300396

また、Ｖ１、Ｖ２の少なくともいずれかの振幅ｆ（θ）から、ギア１２の回転回数ｎを演算する。そして、ギア１２の１回転内の回転角度θ１及び回転回数ｎから、ギア１１の回転角度θ、つまり回転軸１０の回転角度θを算出する。   Further, the number of rotations n of the gear 12 is calculated from the amplitude f (θ) of at least one of V1 and V2. Then, the rotation angle θ of the gear 11, that is, the rotation angle θ of the rotary shaft 10 is calculated from the rotation angle θ 1 within one rotation of the gear 12 and the number of rotations n.

ところで、磁気検出素子１３３、１３４の出力信号Ｖ１及びＶ２が正常である場合、Ｖ１、Ｖ２によって決まる点を直交座標上に描くと、図７に示すように、座標原点からの距離がｆ（θ）の渦状の曲線となる。このとき、Ｖ１、Ｖ２によって決まる点と座標原点とを結ぶ直線と、Ｖ１軸とのなす角が回転角度θとなる。つまり、Ｖ１、Ｖ２、回転角度θの間には一定の対応関係がある。そのため、Ｖ１、Ｖ２、回転角度θを、予め設定されたＶ１、Ｖ２、回転角度θの間の正常な対応関係を示す期待値と比較することで、回転角度θが正常か否かを判定することができる。   By the way, when the output signals V1 and V2 of the magnetic detection elements 133 and 134 are normal, when a point determined by V1 and V2 is drawn on the orthogonal coordinates, the distance from the coordinate origin is f (θ) as shown in FIG. ) Is a spiral curve. At this time, the angle formed between the straight line connecting the point determined by V1 and V2 and the coordinate origin and the V1 axis is the rotation angle θ. That is, there is a certain correspondence between V1, V2 and the rotation angle θ. Therefore, it is determined whether or not the rotation angle θ is normal by comparing V1, V2 and the rotation angle θ with an expected value indicating a normal correspondence between V1, V2 and the rotation angle θ set in advance. be able to.

しかし、実際には、数３に示すように、磁気検出素子１３３、１３４の出力信号Ｖ１、Ｖ２にノイズ等による誤差成分Ｖｅ１，Ｖｅ２が重畳されている。

Figure 2009300396
However, actually, as shown in Equation 3, error components Ve1 and Ve2 due to noise or the like are superimposed on the output signals V1 and V2 of the magnetic detection elements 133 and 134.
Figure 2009300396

そのため、誤差成分を除いた項が正常であっても、Ｖ１、Ｖ２、回転角度θによって決まる点が、期待値から外れてしまう場合がある。   Therefore, even if the term excluding the error component is normal, the point determined by V1, V2, and the rotation angle θ may deviate from the expected value.

そこで、このような事態を防止すため、図８及び図９に示すように、期待値に許容範囲を設けている。具体的には、算出したギア１２の回転回数ｎの端数に基づいて許容範囲を設けている。そして、Ｖ１、Ｖ２、回転角度θによって決まる点が、この許容範囲内にあるか否かによって回転角度θが正常か否かを判定している。   Therefore, in order to prevent such a situation, as shown in FIGS. 8 and 9, an allowable range is provided for the expected value. Specifically, an allowable range is provided based on the calculated fraction n of the number of rotations n of the gear 12. Whether or not the rotation angle θ is normal is determined based on whether or not the point determined by V1, V2 and the rotation angle θ is within the allowable range.

ギア１２の回転回数ｎは、数４に示すように、磁気検出素子１３３、１３４の出力信号Ｖ１、Ｖ２、回転角度θに伴って変化する振幅ｆ（θ）の最大値、最小値、及び、ギア比によって算出される。

Figure 2009300396
As shown in Equation 4, the number of rotations n of the gear 12 is the maximum and minimum values of the output signals V1 and V2 of the magnetic detection elements 133 and 134, the amplitude f (θ) that changes with the rotation angle θ, and Calculated by gear ratio.
Figure 2009300396

本来、ギア１２の回転回数は整数である。しかし、算出したギア１２の回転回数ｎには、図１０に示すように、誤差成分Ｖｅ１，Ｖｅ２に起因する小数点以下の端数が含まれている。この端数の最大値に対して余裕を考慮し、図８及び図９に示す許容範囲εが求められる。   Originally, the number of rotations of the gear 12 is an integer. However, the calculated number of rotations n of the gear 12 includes fractions after the decimal point due to the error components Ve1 and Ve2, as shown in FIG. The allowable range ε shown in FIGS. 8 and 9 is obtained in consideration of a margin with respect to the maximum value of the fraction.

最後に、効果について説明する。本実施形態によれば、磁気検出素子１３３、１３４の出力信号Ｖ１、Ｖ２に基づいて回転軸１０の回転角度θを算出することができる。また、Ｖ１、Ｖ２と回転角度θとの間には一体の対応関係がある。そのため、この対応関係を期待値として予め設定しておき、Ｖ１、Ｖ２と回転角度θとをこの期待値と比較することで、回転角度θが正常か否かを判定することができる。従って、回転角度θを算出するとともに、算出した回転角度θの異常を判定することができる。しかも、Ｖ１、Ｖ２と回転角度θとを予め設定された期待値と比較するだけで判定できるため、構成を簡素化することができる。   Finally, the effect will be described. According to the present embodiment, the rotation angle θ of the rotating shaft 10 can be calculated based on the output signals V1 and V2 of the magnetic detection elements 133 and 134. Further, there is an integral correspondence between V1 and V2 and the rotation angle θ. Therefore, it is possible to determine whether or not the rotation angle θ is normal by setting this correspondence as an expected value in advance and comparing V1, V2 and the rotation angle θ with the expected value. Accordingly, the rotation angle θ can be calculated, and an abnormality of the calculated rotation angle θ can be determined. In addition, since the determination can be made only by comparing V1, V2 and the rotation angle θ with preset expected values, the configuration can be simplified.

また、本実施形態によれば、期待値は、磁気検出素子１３３、１３４の出力信号Ｖ１、Ｖ２に含まれる誤差成分Ｖｅ１，Ｖｅ２に基づいて求められる許容範囲を有している。そのため、Ｖ２に含まれる誤差成分Ｖｅ１，Ｖｅ２の影響を抑え、算出した回転軸１０の回転角度θの異常を精度よく判定することができる。   Further, according to the present embodiment, the expected value has an allowable range obtained based on the error components Ve1 and Ve2 included in the output signals V1 and V2 of the magnetic detection elements 133 and 134. Therefore, the influence of the error components Ve1 and Ve2 included in V2 can be suppressed, and the abnormality of the calculated rotation angle θ of the rotary shaft 10 can be accurately determined.

また、本実施形態によれば、ギア１２の１回転内の回転角度θ１は、磁気検出素子１３３、１３４の出力信号Ｖ１、Ｖ２から三角関数演算によって算出することができる。Ｖ１、Ｖ２の振幅は、回転軸１０の回転角度θに応じて単調増加又は単調減少する。そのため、Ｖ１、Ｖ２の少なくともいずれかの振幅に基づいてギア１２の回転回数ｎを算出することができる。従って、ギア１２の１回転内の回転角度θ１及び回転回数ｎに基づいて回転軸１０の回転角度θを算出することができる。また、期待値の許容範囲は、算出したギア１２の回転回数ｎに基づいて求められる。Ｖ１、Ｖ２に含まれる誤差成分Ｖｅ１，Ｖｅ２の影響は、算出したギア１２の回転回数ｎに小数点以下の端数として表れる。そのため、算出したギア１２の回転回数ｎに基づいて許容範囲を求めることで、Ｖ１、Ｖ２に含まれる誤差成分Ｖｅ１，Ｖｅ２の影響を確実に抑えることができる。   Further, according to the present embodiment, the rotation angle θ1 within one rotation of the gear 12 can be calculated from the output signals V1 and V2 of the magnetic detection elements 133 and 134 by trigonometric function calculation. The amplitudes of V1 and V2 monotonously increase or monotonously decrease according to the rotation angle θ of the rotating shaft 10. Therefore, the number of rotations n of the gear 12 can be calculated based on the amplitude of at least one of V1 and V2. Therefore, the rotation angle θ of the rotary shaft 10 can be calculated based on the rotation angle θ1 in one rotation of the gear 12 and the number of rotations n. Further, the allowable range of the expected value is obtained based on the calculated number of rotations n of the gear 12. The influence of the error components Ve1 and Ve2 included in V1 and V2 appears as a fraction after the decimal point in the calculated number of rotations n of the gear 12. Therefore, by determining the allowable range based on the calculated number of rotations n of the gear 12, it is possible to reliably suppress the influence of the error components Ve1 and Ve2 included in V1 and V2.

また、本実施形態によれば、磁石１３０は、回転軸心Ｍの近傍において、回転軸心Ｍに直交し、回転軸心Ｍの下方から上方に向かうに従って単調減少する磁束Φが発生する。また、変位装置１３２は、回転軸１０の回転に伴って、磁石１３０の固定されたギア１２を回転軸心Ｍの上下方向に変位させる。さらに、磁気検出素子１３３、１３４は、感磁方向が回転軸心Ｍに対して直交方向であって、互いのなす角度が周方向に９０度になるように配置されている。そのため、回転軸１０の回転角度θに応じて振幅がともに単調増加又は単調減少する、互いに同位相及び逆位相でない２つの正弦波信号を確実に出力することができる。   In addition, according to the present embodiment, the magnet 130 generates a magnetic flux Φ that is orthogonal to the rotation axis M in the vicinity of the rotation axis M and monotonously decreases from the lower side to the upper side of the rotation axis M. The displacement device 132 displaces the gear 12 to which the magnet 130 is fixed in the vertical direction of the rotation axis M as the rotation shaft 10 rotates. Further, the magnetic detection elements 133 and 134 are arranged so that the magnetic sensing direction is perpendicular to the rotational axis M and the angle between them is 90 degrees in the circumferential direction. Therefore, it is possible to reliably output two sine wave signals whose amplitudes are monotonously increased or monotonically decreased according to the rotation angle θ of the rotating shaft 10 and are not in phase and opposite phases.

また、本実施形態によれば、磁石１３０の内周面には、Ｎ極及びＳ極が、回転軸心Ｍを挟んで互いに対向するように着磁されている。そのため、ギア１２の回転軸心Ｍの近傍において回転軸心Ｍに直交する磁束を確実に発生することができる。   Further, according to the present embodiment, the N pole and the S pole are magnetized on the inner peripheral surface of the magnet 130 so as to face each other with the rotation axis M interposed therebetween. Therefore, a magnetic flux orthogonal to the rotation axis M can be reliably generated in the vicinity of the rotation axis M of the gear 12.

また、本実施形態によれば、磁石１３０の内周面は、回転軸心Ｍの下方から上方に向かうに従って拡径するように、テーパ状に成形されている。そのため、ギア１２の回転軸心Ｍの近傍において、回転軸心Ｍの方向に大きさが単調増加又は単調減少する磁束を確実に発生することができる。   Further, according to the present embodiment, the inner peripheral surface of the magnet 130 is formed in a tapered shape so that its diameter increases from the lower side of the rotation axis M toward the upper side. Therefore, in the vicinity of the rotation axis M of the gear 12, a magnetic flux whose size increases monotonously or decreases in the direction of the rotation axis M can be reliably generated.

また、本実施形態によれば、ギア１２は、ハウジング１５に回転可能に支持されている。また、変位装置１３２は、雄ねじ部１３２０と、それに螺合する雌ねじ部１３２２とから構成されている。雄ねじ部１３２０はギア１２の外周面に、雌ねじ部１３２２はハウジング１５に固定されたスリーブ１３２１の外周面にそれぞれ形成されている。そのため、ギア１２を回転軸心Ｍの方向に確実に変位させることができる。   Further, according to the present embodiment, the gear 12 is rotatably supported by the housing 15. Moreover, the displacement apparatus 132 is comprised from the external thread part 1320 and the internal thread part 1322 screwed together. The male screw portion 1320 is formed on the outer peripheral surface of the gear 12, and the female screw portion 1322 is formed on the outer peripheral surface of the sleeve 1321 fixed to the housing 15. Therefore, the gear 12 can be reliably displaced in the direction of the rotation axis M.

さらに、本実施形態によれば、信号出力装置１３は、磁石１３０の外周側を包囲し、磁路の一部を構成するヨーク１３１を備えている。そのため、外部からの磁気的影響を抑えることができる。   Further, according to the present embodiment, the signal output device 13 includes the yoke 131 that surrounds the outer peripheral side of the magnet 130 and constitutes a part of the magnetic path. Therefore, the magnetic influence from the outside can be suppressed.

加えて、本実施形態によれば、ヨーク１３１は、ギア１２の内周に一体的に形成されている。そのため、部品点数を削減しコストを抑えることができる。   In addition, according to the present embodiment, the yoke 131 is integrally formed on the inner periphery of the gear 12. Therefore, the number of parts can be reduced and the cost can be suppressed.

なお、本実施形態では、磁気検出素子１３３、１３４の出力信号が、位相が９０度異なる回転角度に応じた正弦波信号である例を挙げているが、これに限られるものではない。互いに同位相及び逆位相でない正弦波信号であればよい。   In the present embodiment, an example is given in which the output signals of the magnetic detection elements 133 and 134 are sine wave signals corresponding to rotation angles whose phases differ by 90 degrees, but the present invention is not limited to this. Any sine wave signal that is not in phase and opposite phase may be used.

また、本実施形態では、磁石１３０と磁気検出素子１３３、１３４から磁気的に正弦波信号を出力する例を挙げているが、これに限られるものではない。例えば、光学的に正弦波信号を出力するようにしてもよい。   In the present embodiment, an example in which a sine wave signal is magnetically output from the magnet 130 and the magnetic detection elements 133 and 134 is described, but the present invention is not limited to this. For example, a sine wave signal may be optically output.

さらに、本実施形態では、円筒状の磁石１３０を用いた例を挙げているが、これに限られるものではない。例えば、円弧状の磁石を用い、回転軸心Ｍを挟んで磁極が互いに対向するように配置してもよい。また、２つの直方体の磁石を用い、回転軸心Ｍを挟んで磁極が互いに対向するように配置してもよい。回転軸心Ｍの近傍において回転軸心Ｍに直交する磁束を形成できればよい。   Furthermore, in this embodiment, although the example using the cylindrical magnet 130 is given, it is not limited to this. For example, arc-shaped magnets may be used and arranged such that the magnetic poles face each other across the rotation axis M. Further, two cuboid magnets may be used, and the magnetic poles may be arranged to face each other with the rotation axis M interposed therebetween. It is sufficient that a magnetic flux perpendicular to the rotation axis M can be formed in the vicinity of the rotation axis M.

本実施形態における回転角度検出装置の軸方向断面図である。It is an axial sectional view of a rotation angle detection device in the present embodiment. 図１におけるギア周辺のＡ−Ａ矢視断面図である。It is AA arrow sectional drawing of the gear periphery in FIG. 図１における信号出力装置周辺の拡大図である。FIG. 2 is an enlarged view around a signal output device in FIG. 1. 図２における信号出力装置周辺の拡大図である。FIG. 3 is an enlarged view around a signal output device in FIG. 2. 変位装置の動作を説明するための軸方向断面図である。It is an axial direction sectional view for explaining operation of a displacement device. 磁気検出素子の出力波形である。It is an output waveform of a magnetic detection element. Ｖ１、Ｖ２と回転角度θの関係を示すグラフである。It is a graph which shows the relationship between V1, V2 and rotation angle (theta). 図７に対して許容範囲εを追加したグラフである。8 is a graph in which an allowable range ε is added to FIG. 図８の一部を拡大したグラフである。It is the graph which expanded a part of FIG. 算出した回転回数ｎを示すグラフである。It is a graph which shows the calculated rotation frequency n.

符号の説明Explanation of symbols

１・・・回転角度検出装置、１０・・・回転軸、１１・・・ギア、１２・・・ギア（回転体）、１３・・・信号出力装置（信号出力手段）、１３０・・・磁石、１３１・・・ヨーク、１３２・・・変位装置（変位手段）、１３２０・・・雄ねじ部、１３２１・・・スリーブ、１３２２・・・雌ねじ部、１３３、１３４・・磁気検出素子、１４・・・回転角度演算装置（回転角度演算手段）、１５・・・ハウジング、１６・・・支持部材 DESCRIPTION OF SYMBOLS 1 ... Rotation angle detection apparatus, 10 ... Rotating shaft, 11 ... Gear, 12 ... Gear (rotating body), 13 ... Signal output device (signal output means), 130 ... Magnet 131 ... Yoke, 132 ... Displacement device (displacement means), 1320 ... Male thread part, 1321 ... Sleeve, 1322 ... Female thread part, 133, 134 ... Magnetic detection element, 14 ... .Rotation angle calculation device (rotation angle calculation means), 15 ... housing, 16 ... supporting member

Claims (9)

回転体と、
前記回転体の回転角度に応じて振幅がともに単調増加又は単調減少する、回転角度に応じた互いに同位相及び逆位相でない２つの正弦波信号を出力する信号出力手段と、
前記２つの正弦波信号に基づいて回転角度を算出し、前記２つの正弦波信号と算出した前記回転角度とを予め設定された期待値と比較することで、算出した前記回転角度が正常か否かを判定する回転角度演算手段と、
を有することを特徴とする回転角度検出装置。 A rotating body,
A signal output means for outputting two sinusoidal signals that are not in phase and antiphase with each other according to the rotation angle, the amplitude both monotonously increasing or monotonically decreasing according to the rotation angle of the rotating body;
A rotation angle is calculated based on the two sine wave signals, and the calculated rotation angle is normal by comparing the two sine wave signals and the calculated rotation angle with a preset expected value. A rotation angle calculating means for determining whether or not
A rotation angle detection device comprising: 前記期待値は、前記２つの正弦波信号に含まれる誤差成分に基づいて求められる許容範囲を有し、
前記回転角度演算手段は、前記２つの正弦波信号と算出した前記回転角度とを前記許容範囲を有する前記期待値と比較することで、算出した前記回転角度が正常であるか否かを判定することを特徴とする請求項１に記載の回転角度検出装置。 The expected value has an allowable range determined based on an error component included in the two sine wave signals,
The rotation angle calculation means determines whether the calculated rotation angle is normal by comparing the two sine wave signals and the calculated rotation angle with the expected value having the allowable range. The rotation angle detection device according to claim 1. 前記回転角度演算手段は、
前記２つの正弦波信号に基づいて１回転内の回転角度を算出するとともに、前記２つの正弦波信号の少なくともいずれかの振幅に基づいて回転回数を算出し、算出した前記１回転内の回転角度及び前記回転回数に基づいて回転角度を算出し、
前記許容範囲は、算出した前記回転回数に基づいて求められることを特徴とする請求項２に記載の回転角度検出装置。 The rotation angle calculation means includes
The rotation angle within one rotation is calculated based on the two sine wave signals, the number of rotations is calculated based on at least one of the amplitudes of the two sine wave signals, and the calculated rotation angle within the one rotation is calculated. And calculating a rotation angle based on the number of rotations,
The rotation angle detection device according to claim 2, wherein the allowable range is obtained based on the calculated number of rotations. 前記信号出力手段は、前記回転体に固定され、前記回転体の回転軸心近傍において回転軸心に直交し、回転軸心方向に大きさが単調増加又は単調減少する磁束を発生する磁石と、
前記回転体の回転に伴って前記回転体を回転軸心方向に変位させる変位手段と、
回転軸心の近傍に、感磁方向が、回転軸心に対して直交方向であって、互いに異なる方向となるように配置される２つの磁束密度検出手段と、
を有することを特徴とする請求項１〜３のいずれか１項に記載の回転角度検出装置。 The signal output means is fixed to the rotating body, is near the rotation axis of the rotating body, is perpendicular to the rotation axis, and generates a magnetic flux whose size increases or decreases monotonously in the direction of the rotation axis.
Displacement means for displacing the rotating body in the direction of the rotation axis as the rotating body rotates,
Two magnetic flux density detection means arranged in the vicinity of the rotation axis so that the magnetic sensing direction is a direction orthogonal to the rotation axis and different from each other;
The rotation angle detection device according to claim 1, wherein the rotation angle detection device has a rotation angle. 前記磁石は、回転軸心の回りに配置され、回転軸心を挟んで対向する磁極を有することを特徴とする請求項４に記載の回転角度検出装置。   The rotation angle detection device according to claim 4, wherein the magnet has a magnetic pole disposed around the rotation axis and opposed to the rotation axis. 前記磁石は、回転軸心に対して直交方向の前記磁極間の距離が回転軸心方向に向かうに従って単調増加又は単調減少することを特徴とする請求項５に記載の回転角度検出装置。   The rotation angle detection device according to claim 5, wherein the magnet monotonously increases or decreases monotonously as a distance between the magnetic poles in a direction orthogonal to the rotation axis goes in the rotation axis direction. 前記回転体は、ハウジングに回転可能に支持され、
前記変位手段は、前記回転体と前記ハウジングとの間に配設されるねじ機構であることを特徴とする請求項１〜６のいずれか１項に記載の回転角度検出装置。 The rotating body is rotatably supported by a housing;
The rotation angle detection device according to claim 1, wherein the displacement unit is a screw mechanism disposed between the rotating body and the housing. 前記信号出力手段は、前記磁石の外周側を包囲し、磁路の一部を構成する筒状のヨークを有することを特徴とする請求項１〜７のいずれか１項に記載の回転角度検出装置。   The rotation angle detection according to any one of claims 1 to 7, wherein the signal output means includes a cylindrical yoke that surrounds the outer peripheral side of the magnet and forms a part of a magnetic path. apparatus. 前記ヨークは、前記回転体に一体的に形成されていることを特徴とする請求項８に記載の回転角度検出装置。   The rotation angle detection device according to claim 8, wherein the yoke is formed integrally with the rotating body.
JP2008158328A 2008-06-17 2008-06-17 Rotation angle detecting device Pending JP2009300396A (en)

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JP2012083313A (en) * 2010-10-14 2012-04-26 Asahi Kasei Electronics Co Ltd Position detection device and electronic apparatus with the same
KR101765403B1 (en) * 2012-09-07 2017-08-04 에이엠에스 아게 Sensor system, steering control system and method for determining a rotation angle
WO2021095641A1 (en) * 2019-11-11 2021-05-20 パナソニックＩｐマネジメント株式会社 Signal processing method, program, and signal processing system

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JP2002296072A (en) * 2001-03-13 2002-10-09 Koninkl Philips Electronics Nv Angle measuring device
JP2007256250A (en) * 2006-02-23 2007-10-04 Denso Corp Rotation angle detecting device
JP2007533975A (en) * 2003-10-22 2007-11-22 マイクロナス・ゲーエムベーハー Detection device having an angle sensor

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JPS6110420A (en) * 1984-03-06 1986-01-17 ア−エスエム　フイコ　ツ−リング　ベスロ−テン　フエン　ノ−トチヤツプ Method and device for molding deburred insert
JP2002296072A (en) * 2001-03-13 2002-10-09 Koninkl Philips Electronics Nv Angle measuring device
JP2007533975A (en) * 2003-10-22 2007-11-22 マイクロナス・ゲーエムベーハー Detection device having an angle sensor
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012083313A (en) * 2010-10-14 2012-04-26 Asahi Kasei Electronics Co Ltd Position detection device and electronic apparatus with the same
KR101765403B1 (en) * 2012-09-07 2017-08-04 에이엠에스 아게 Sensor system, steering control system and method for determining a rotation angle
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