JP4987073B2 - 絶対回転位置検出方法 - Google Patents
絶対回転位置検出方法 Download PDFInfo
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- JP4987073B2 JP4987073B2 JP2009512791A JP2009512791A JP4987073B2 JP 4987073 B2 JP4987073 B2 JP 4987073B2 JP 2009512791 A JP2009512791 A JP 2009512791A JP 2009512791 A JP2009512791 A JP 2009512791A JP 4987073 B2 JP4987073 B2 JP 4987073B2
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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
- G01D5/244—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 characteristics of pulses or pulse trains; generating pulses or pulse trains
- G01D5/249—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 characteristics of pulses or pulse trains; generating pulses or pulse trains using pulse code
- G01D5/2497—Absolute encoders
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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
- G01D5/244—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 characteristics of pulses or pulse trains; generating pulses or pulse trains
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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
-
- 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
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- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
前記2極側絶対値エンコーダは、前記回転軸と一体回転する2極着磁された2極マグネットと、当該2極マグネットの回転に伴って90度の位相差を有する正弦波信号を回転軸1回転につき1周期で出力する一対の磁気検出素子とを備えており、
前記多極側絶対値エンコーダは、前記回転軸と一体回転する磁極対がPpとなるように着磁された多極マグネットと、当該多極マグネットの回転に伴って90度の位相差を有する正弦波信号を回転軸1回転につきPp周期で出力する一対の磁気検出素子とを備えており、
前記回転軸の回転位置の検出動作に先立って、当該回転軸を回転して、前記2極側絶対値エンコーダの各絶対値θtに対する前記多極側絶対値エンコーダの絶対値θeltを測定して割り当てておくと共に、前記2極側絶対値エンコーダの各絶対値θtに対して前記多極マグネットの仮の磁極対番号Nxを割り当てておき、
前記回転軸の回転位置の検出動作においては、
前記2極側絶対値エンコーダによる前記回転軸の絶対値θtiを計測し、
前記多極側絶対値エンコーダによる前記回転軸の絶対値θelrを計測し、
計測した前記絶対値θtiに割り当てられている前記絶対値θeltiと、計測された前記絶対値θelrとに基づき、前記絶対値θtiに割り当てられている仮の前記磁極対番号Nxiを補正して、磁極対番号Nrを算出し、
前記回転軸の1回転内の機械角絶対位置θabsを、多極側絶対値エンコーダの出力信号の1周期分の電気角に相当する機械角θelpを用いて、次式により算出することを特徴としている。
θabs=(Nr×θelp+θelr)/Pp
X<2×((θelp/2)−(Pp×θelp/Rt))/Pp
θelr≧(θelt−θelp/2)ならば、補正磁極対番号Nr=Nxとし、
θelr<(θelt−θelp/2)ならば、補正磁極対番号Nr=Nx+1とする。
θelr<(θelt+θelp/2)ならば、補正磁極対番号Nr=Nxとし、
θelr≧(θelt+θelp/2)ならば、補正磁極対番号Nr=Nx−1とする。
X<2×((θelp/2)−(θelp/Rtmin))/Pp
X<2×((θelp/M)−(Pp×θelp/Rt))/Pp
θelr≧(θelt−θelp/M)ならば、補正磁極対番号Nr=Nxとし、
θelr<(θelt−θelp/M)ならば、補正磁極対番号Nr=Nx+1とする。
θelr<(θelt+θelp/M)ならば、補正磁極対番号Nr=Nxとし、
θelr≧(θelt+θelp/M)ならば、補正磁極対番号Nr=Nx−1とする。
X<2×((θelp/M)−(θelp/Rtmin))/Pp
θabs=(Nr×θelp+θelr)/Pp (1)
X<2×((θelp/2−(Pp×θelp/Rt))/Pp (2)
Rm:多極側絶対値エンコーダの分解能
Rt:2極側絶対値エンコーダの分解能
θelr:多極側絶対値エンコーダの実際の絶対値(0〜(θelp−1))
θelt:多極側絶対値エンコーダの仮の絶対値(0〜(θelp−1))
θti:2極側絶対値エンコーダの絶対値(0〜(θtp−1))
Pp:多極マグネットリングの磁極対数
Nr:多極マグネットリングの実際の磁極対番号(0〜(Pp−1))
Nx:多極マグネットリングの仮の磁極対番号(0〜(Pp−1))
X<2×((θelp/2−(θelp/Rtmin))/Pp (2A)
X<2×((θelp/M−(Pp×θelp/Rt))/Pp (2B)
X<2×((θelp/M−(θelp/Rtmin))/Pp (2C)
Claims (4)
- 2極側絶対値エンコーダと、磁極対がPp(Pp:2以上の整数)の多極側絶対値エンコーダとを用いて、回転軸の1回転内の各絶対回転位置を検出する絶対回転位置検出方法において、
前記2極側絶対値エンコーダは、前記回転軸と一体回転する2極着磁された2極マグネットと、当該2極マグネットの回転に伴って90度の位相差を有する正弦波信号を回転軸1回転につき1周期で出力する一対の磁気検出素子とを備えており、
前記多極側絶対値エンコーダは、前記回転軸と一体回転する磁極対がPpとなるように着磁された多極マグネットと、当該多極マグネットの回転に伴って90度の位相差を有する正弦波信号を回転軸1回転につきPp周期で出力する一対の磁気検出素子とを備えており、
前記回転軸の回転位置の検出動作に先立って、当該回転軸を回転して、前記2極側絶対値エンコーダの各絶対値θtに対する前記多極側絶対値エンコーダの絶対値θeltを測定して割り当てておくと共に、前記2極側絶対値エンコーダの各絶対値θtに対して前記多極マグネットの仮の磁極対番号Nxを割り当てておき、
前記回転軸の回転位置の検出開始時においては、
前記2極側絶対値エンコーダによる前記回転軸の絶対値θtiを計測し、
前記多極側絶対値エンコーダによる前記回転軸の絶対値θelrを計測し、
計測した前記絶対値θtiに割り当てられている前記絶対値θeltと、計測された前記絶対値θelrとに基づき、前記絶対値θtiに割り当てられている仮の前記磁極対番号Nxを補正して、磁極対番号Nrを算出し、
前記回転軸の1回転内の機械角絶対位置θabsを、多極側絶対値エンコーダの出力信号の1周期分の電気角に相当する機械角θelpを用いて、次式により算出することを特徴とする絶対回転位置検出方法。
θabs=(Nr×θelp+θelr)/Pp - 請求項1に記載の絶対回転位置検出方法において、
前記2極側絶対値エンコーダの分解能をRtとし、Mを2以上の整数とした場合に、当該2極側絶対値エンコーダの角度再現性Xを、
X<2×{((θelp/M)−(Pp×θelp/Rt))/Pp}
を満足するように設定し、
θelt≧θelp/Mの場合には、
θelr≧(θelt−θelp/M)ならば磁極対番号NrをNxとし、
θelr<(θelt−θelp/M)ならば磁極対番号NrをNx+1とし、
θelt<θelp/2の場合には、
θelr<(θelt+θelp/M)ならば磁極対番号NrをNxとし、
θelr≧(θelt+θelp/M)ならば磁極対番号NrをNx−1とすることを特徴とする絶対回転位置検出方法。 - 請求項2に記載の絶対回転位置検出方法において、
前記2極側絶対値エンコーダにおける前記多極側絶対値エンコーダの各磁極対に対する分解能の最小値をRtminとすると、前記2極側絶対値エンコーダの角度再現性Xを、
X<2×{((θelp/M)−(θelp/Rtmin))/Pp}
を満足するように設定することを特徴とする絶対回転位置検出方法。 - 請求項1ないし3のうちのいずれかの項に記載の絶対回転位置検出方法を用いて回転軸の1回転内の絶対回転位置を検出することを特徴とする磁気式絶対値エンコーダ。
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2007/000448 WO2008136053A1 (ja) | 2007-04-24 | 2007-04-24 | 絶対回転位置検出方法 |
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| Publication Number | Publication Date |
|---|---|
| JPWO2008136053A1 JPWO2008136053A1 (ja) | 2010-07-29 |
| JP4987073B2 true JP4987073B2 (ja) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2009512791A Active JP4987073B2 (ja) | 2007-04-24 | 2007-04-24 | 絶対回転位置検出方法 |
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| Country | Link |
|---|---|
| US (1) | US20120068694A1 (ja) |
| JP (1) | JP4987073B2 (ja) |
| KR (1) | KR101273978B1 (ja) |
| CN (1) | CN101646922B (ja) |
| DE (1) | DE112007003466B4 (ja) |
| WO (1) | WO2008136053A1 (ja) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009021081B4 (de) * | 2008-07-18 | 2017-07-06 | Asm Automation Sensorik Messtechnik Gmbh | Magnetischer Winkelsensor |
| DE102008057288A1 (de) * | 2008-11-14 | 2010-05-20 | Continental Automotive Gmbh | Steuervorrichtung für einen Motor und Verfahren zum Steuern des Motors |
| JP5328932B2 (ja) * | 2009-11-18 | 2013-10-30 | 株式会社ハーモニック・ドライブ・システムズ | 磁気式アブソリュートエンコーダーおよびモーター |
| WO2011139682A2 (en) * | 2010-04-26 | 2011-11-10 | Avtron Industrial Automation, Inc. | Absolute encoder |
| CN102042839B (zh) * | 2010-08-19 | 2012-07-25 | 葛幸华 | 两个不同周期测量传感器组合成绝对式角度编码器的原理 |
| US9606190B2 (en) | 2012-12-21 | 2017-03-28 | Allegro Microsystems, Llc | Magnetic field sensor arrangements and associated methods |
| US9417295B2 (en) | 2012-12-21 | 2016-08-16 | Allegro Microsystems, Llc | Circuits and methods for processing signals generated by a circular vertical hall (CVH) sensing element in the presence of a multi-pole magnet |
| TW201516765A (zh) * | 2013-10-16 | 2015-05-01 | Elan Microelectronics Corp | 可判斷功能切換的觸控裝置、系統及其功能切換控制方法 |
| CN105333891A (zh) * | 2014-08-08 | 2016-02-17 | 上海联影医疗科技有限公司 | 编码装置、编码方法及医疗病床 |
| KR101885275B1 (ko) * | 2016-05-04 | 2018-09-10 | 성균관대학교산학협력단 | 노이즈를 제거한 신호를 이용하여 각도를 결정하는 방법, 엔코더의 출력 신호를 보정하는 방법 및 앱솔루트 엔코더 |
| US10393499B2 (en) | 2016-05-04 | 2019-08-27 | Fastech Co., Ltd. | Angle determinating method using encoder signal with noise suppression, adjusting method for output signal of encoder and absolute encoder |
| CN107340003B (zh) * | 2017-07-03 | 2019-11-19 | 珠海格力电器股份有限公司 | 一种绝对信号校正方法及绝对信号的校正系统 |
| JP7056367B2 (ja) * | 2018-05-17 | 2022-04-19 | トヨタ自動車株式会社 | 認識エラー検出装置、電動ブレーキ制御装置 |
| CN109870177B (zh) * | 2019-02-15 | 2021-10-08 | 广州极飞科技股份有限公司 | 磁编码器及其校准方法和校准装置、电机以及无人飞行器 |
| JP6607423B1 (ja) * | 2019-03-01 | 2019-11-20 | 株式会社安川電機 | エンコーダ、サーボモータ、サーボシステム |
| CN114613121B (zh) * | 2022-03-19 | 2026-02-13 | 广州启鸿电子科技有限公司 | 一种智能驱动单元及驱动单元输出端绝对位置测算方法 |
Citations (2)
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| JPH06147814A (ja) * | 1992-11-10 | 1994-05-27 | Sankyo Seiki Mfg Co Ltd | 回転角度検出装置 |
| JPH0850034A (ja) * | 1994-08-05 | 1996-02-20 | Nikon Corp | 多回転アブソリュートエンコーダ |
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| JPH0610813A (ja) | 1992-06-25 | 1994-01-21 | Mitsubishi Electric Corp | 始動電動機 |
| DE19727352A1 (de) * | 1996-07-10 | 1998-01-15 | Heidenhain Gmbh Dr Johannes | Verfahren zur Positionsbestimmung und hierzu geeignetes Meßsystem |
| DE19719564A1 (de) * | 1997-05-09 | 1998-11-12 | Mannesmann Vdo Ag | Verfahren zum Messen des Drehwinkels einer drehbaren Welle, insbesondere eines drehbaren Schalters und Vorrichtung zur Ausführung des Verfahrens |
| US6522130B1 (en) * | 1998-07-20 | 2003-02-18 | Uqm Technologies, Inc. | Accurate rotor position sensor and method using magnet and sensors mounted adjacent to the magnet and motor |
| US6556005B1 (en) * | 2000-01-27 | 2003-04-29 | Goodrich Avionics Systems, Inc. | Magnetic encoder apparatus capable of resolving axial and rotational displacements |
| DE10041089A1 (de) * | 2000-08-22 | 2002-03-07 | Bosch Gmbh Robert | Verfahren zur Korrektur einer Winkelmessung |
| JP2005172721A (ja) * | 2003-12-15 | 2005-06-30 | Harmonic Drive Syst Ind Co Ltd | アブソリュート磁気エンコーダ |
| CN100439866C (zh) * | 2004-05-21 | 2008-12-03 | 株式会社安川电机 | 多转型绝对值编码器 |
| DE102005037938A1 (de) * | 2005-08-11 | 2007-02-15 | Zf Lenksysteme Gmbh | Vorrichtung zur Ermittlung der Position und eines Drehmoments einer Welle |
-
2007
- 2007-04-24 JP JP2009512791A patent/JP4987073B2/ja active Active
- 2007-04-24 CN CN2007800526405A patent/CN101646922B/zh active Active
- 2007-04-24 DE DE112007003466.1T patent/DE112007003466B4/de active Active
- 2007-04-24 WO PCT/JP2007/000448 patent/WO2008136053A1/ja not_active Ceased
- 2007-04-24 KR KR1020097023080A patent/KR101273978B1/ko active Active
- 2007-04-24 US US12/596,006 patent/US20120068694A1/en not_active Abandoned
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06147814A (ja) * | 1992-11-10 | 1994-05-27 | Sankyo Seiki Mfg Co Ltd | 回転角度検出装置 |
| JPH0850034A (ja) * | 1994-08-05 | 1996-02-20 | Nikon Corp | 多回転アブソリュートエンコーダ |
Also Published As
| Publication number | Publication date |
|---|---|
| DE112007003466T5 (de) | 2010-04-01 |
| DE112007003466B4 (de) | 2014-12-11 |
| US20120068694A1 (en) | 2012-03-22 |
| WO2008136053A1 (ja) | 2008-11-13 |
| CN101646922B (zh) | 2011-06-22 |
| JPWO2008136053A1 (ja) | 2010-07-29 |
| KR20100016230A (ko) | 2010-02-12 |
| CN101646922A (zh) | 2010-02-10 |
| KR101273978B1 (ko) | 2013-06-12 |
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