CN1260871A - 磁编码装置 - Google Patents

磁编码装置 Download PDF

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CN1260871A
CN1260871A CN98806128A CN98806128A CN1260871A CN 1260871 A CN1260871 A CN 1260871A CN 98806128 A CN98806128 A CN 98806128A CN 98806128 A CN98806128 A CN 98806128A CN 1260871 A CN1260871 A CN 1260871A
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CN1236285C (zh
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有永雄司
铃木嚆二
村上智
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Yaskawa Electric Corp
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING 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
    • G01D5/00Mechanical 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
    • G01D5/12Mechanical 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
    • G01D5/14Mechanical 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
    • G01D5/142Mechanical 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
    • G01D5/147Mechanical 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 movement of a third element, the position of Hall device and the source of magnetic field being fixed in respect to each other
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING 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
    • G01D5/00Mechanical 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
    • G01D5/12Mechanical 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
    • G01D5/244Mechanical 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
    • G01D5/245Mechanical 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 a variable number of pulses in a train
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01DMEASURING 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
    • G01D5/00Mechanical 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
    • G01D5/12Mechanical 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
    • G01D5/244Mechanical 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
    • G01D5/245Mechanical 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 a variable number of pulses in a train
    • G01D5/2454Encoders incorporating incremental and absolute signals
    • G01D5/2455Encoders incorporating incremental and absolute signals with incremental and absolute tracks on the same encoder
    • G01D5/2457Incremental encoders having reference marks

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

Abstract

本发明的磁编码装置的构成包括具有检测位置的狭缝的移动盘5、经移动盘和空隙配置的磁传感器1、设在上述磁传感器的背面的偏置磁铁2和处理从上述磁传感器来的信号的信号处理电路6,移动盘包括具有位置检测用的狭缝的位置检测用的狭缝磁道31、具有电机磁极检测用的狭缝磁道33和设有原点位置检测用的狭缝的原点检测用的狭缝磁道32,在狭缝磁道的位置上分别配置了具有偏置磁铁的磁传感器。

Description

磁编码装置
(技术领域)
本发明涉及磁编码装置。
(背景技术)
作为使用齿轮方式的磁编码装置,过去有图6所示的方式的磁编码装置。在图6中,与磁性齿轮81面对面地配置安装有偏置磁铁2的磁传感器1。磁性齿轮81安装在电机8的旋转轴上。下面,说明其工作。当磁性齿轮81旋转而且齿部靠近传感器1时,因从偏置磁铁2来的磁通容易通过齿轮,故加到磁传感器1上的磁通增加。当磁性齿轮旋转而且齿部远离传感器1时,磁阻增加,加到磁传感器1上的磁通减少。这样,利用由磁阻元件构成的磁传感器1检测因磁阻变化引起的磁通变化并将其变换成电信号。进而,使用比较器73对该变化的电信号进行整形,得到方波信号。因该方式使用了齿轮并利用了磁路磁阻的变化,故将该方式称之为磁阻方式。
作为下一个现有例,示出图7所示的构成的装置(特开平5-52584)。这是使作为移动体的转盘10与圆盘状的屏蔽部件10d以及圆盘状的永久磁铁9成为一体而构成的。永久磁铁9在其轴向进行单极磁化,具有在表面背面极性不同的一对磁极。屏蔽部件10d由软磁材料形成,在其外边缘部以规定的间距呈圆环状形成多个狭缝。由此,在屏蔽部件10d上沿旋转盘10的旋转方向交替地形成磁阻大的作为磁屏蔽部10c的狭缝和磁阻小的磁通路部10b。因此,在旋转盘10的外边缘部上形成使从永久磁铁9来的磁通沿旋转盘10旋转的方向交替地变化的磁极10a。在上述结构中,当旋转盘10旋转时,从磁极10a来的作用于磁传感器1的磁通发生周期性的变化,能够从磁传感器1输出随磁极10a的排列间距变化的检测信号。
但是,象现有例那样,对齿轮方式来说,存在必须在与齿轮相对的位置上配置磁传感器从而使径向尺寸变大的问题,此外,从磁传感器得到的信号只是一种信号,当要从磁传感器得到例如原点信号、极(pole)传感信号等信号时,必须使用另外的齿轮,或使齿轮变厚来形成另外的信号的齿轮,存在制造成本高的问题。此外,象现有例2那样,在使排列磁屏蔽部狭缝的屏蔽部件与永久磁铁成为一体来形成旋转盘的方式中,从永久磁铁的磁极面积与厚度的关系方面考虑,存在难以使旋转盘变薄的问题。
(发明的公开)
本发明的目的在于提供一种高性能的薄型磁传感装置,其中,移动盘作成不使用磁铁的磁性薄板,在一张旋转盘上形成多个狭缝磁道,与各狭缝磁道对应地配置磁传感器,因此,制造成本低,而且可以检测多种信号。
因此,本发明是具有由磁性材料形成的、具有在圆盘的圆周方向上检测位置的狭缝的移动盘、经上述移动盘和空隙配置的磁传感器、设在上述磁传感器的背面的偏置磁铁和处理从上述磁传感器来的信号的信号处理电路的磁编码装置,
上述移动盘的构成包括:具有上述位置检测用的狭缝的位置检测用的狭缝磁道、具有电机磁极检测用的狭缝的检测用的狭缝磁道和设有原点位置检测用的狭缝的原点检测用的狭缝磁道,在上述狭缝磁道的位置上分别配置具有上述偏置磁铁的上述磁传感器。
此外,可将上述磁极检测用的狭缝磁道的形状作成在上述位置检测用的狭缝磁道的外径一侧设有向外径方向突出的突出部和空间部,可将上述原点检测用的狭缝磁道的形状作成使其设在上述位置检测用的狭缝磁道的内径一侧。
此外,可以在上述磁极检测用磁传感器和上述偏置磁铁之间设置非磁性材料。
此外,可以配置3组6个检测3相电机的极性的相信号用和倒相信号用的上述磁极检测用磁传感器,上述信号处理电路可以在磁极检测用信号处理电路中设置差分放大电路,对上述3组信号进行差分放大。
(附图的简单说明)
图1是表示本发明的磁编码装置的外观的斜视图。
图2是表示本发明的磁编码装置的磁极检测部的图,图2(a)是表示磁传感器的侧视截面图,图2(b)是表示磁极检测用的狭缝磁道的局部平面图。
图3是本发明的磁编码装置的的输出波形图。
图4是表示本发明的磁编码装置的另一形态的斜视图。
图5是表示本发明的磁极检测用信号处理电路的电路图。
图6是表示现有例的主要部分的构成的斜视图。
图7是表示另一个现有例的主要部分的构成的斜视图。
(实施发明的最佳形态)
下面,根据附图说明本发明的实施例。
图1是表示本发明的磁阻型磁旋转编码器的外观的斜视图。在图1中,11是位置检测用传感器,13a~13c是检测电机的磁极位置的磁极位置检测用传感器,12是原点检测用磁传感器,21是偏置磁铁,用来对是原点检测用磁传感器12加上磁通,23a~23c是偏置磁铁,用来对是磁传感器13a~13c加上磁通,5是安装在移动体上由磁性材料形成的移动盘,6是取出磁传感器的信号并输出方波的信号处理电路。利用刻蚀等方法在移动盘5上形成位置检测用的狭缝磁道31、原点检测用的狭缝磁道32和磁极检测用的狭缝磁道33。当移动盘5旋转时,磁传感器的电阻值因有无狭缝引起的磁通的变化而变化,将该变化转换成电信号。进而,利用信号处理电路8对该电信号进行波形整形从而得到方波。这里,各狭缝磁道的配置也可以不用图1的配置,可以任意选择。
图2是表示本发明的磁编码装置的磁极检测部的图,图2(a)是表示磁传感器13的侧视截面图,图2(b)是表示磁极检测用的狭缝磁道33的局部平面图。图2中,23a是偏置磁铁,4是非磁性材料。狭缝磁道33由向外径方向突出的突出部331和空间部332形成。磁极检测用磁传感器13a在偏置磁铁23a的磁通的影响下,象图3所示的信号输出例那样输出直流偏置电压,检测信号受到该直流偏置电压的偏置而被检测出来。为使该直流偏置电压为某一值,配置非磁性材料4并设定其厚度。这里,非磁性材料4也可以是电路基板等中使用的环氧树脂。
图4是表示本发明的磁极检测用磁传感器13的构成的斜视图。在本实施形态中,作为3相6极电机之用狭缝旋转1圈被分割成每60度一份的6等份。在图4中,b1~b6是偏置磁铁,s1~s6是磁传感器,分别是U相、U*相、V相、V*相、W相、W*相。以U相磁传感器为基准,U*相磁传感器在-60度的位置, U*相磁传感器在-60度的位置,V*相磁传感器在+60度的位置,V*相磁传感器在-20度的位置,W*相磁传感器在-40度的位置,W*相磁传感器在+20度的位置,从而能够得到U*相信号是U相信号的倒相信号、V*相信号是V相信号的倒相信号、W*相信号是W相信号的倒相信号,而且U相、V相、W相信号间的相位差分别是120度。U相~W*相信号经磁极检测用的信号处理电路7进行差分放大后输入比较器,输出方波。
下面,说明输出方波的磁极检测用信号处理电路7。图5是磁极检测用信号处理电路7的电路图。在图5中,71是放大电路,72是差分放大电路,73是比较器。U相~W*相信号由放大电路711~716放大,该各信号在差分放大器721~723中,使U*相、V*相、W*相信号倒相后与U相、V相、W相相加,其输出信号由比较器73整形成方波,分别输出U相、V相、W相信号。这样,通过在1张移动盘上形成多个狭缝磁道,可以形成制造成本低、1张盘能得到多种信号的薄型磁编码器。此外,因与移动狭缝面内的狭缝磁道面对面地配置磁传感器,故可以使其径向尺寸减小。此外,与磁极的检测相关连地在磁传感器和偏置磁铁之间设置非磁性材料,通过调节非磁性材料的厚度可以得到适当的直流偏置,所以,能够得到信号振幅大了直流偏置这部分的检测信号,进而,利用差分放大能够得到抗温度变化能力强、抗噪声能力强的高性能的磁编码器。
(工业上利用的可能性)
如上所述,本发明的磁编码装置的制造成本低、体积小,适合于能得到的信号振幅大了直流偏置这部分的检测信号、进而利用差分放大能够对温度变化和噪声都有很强的抵抗能力的高性能的磁编码器。

Claims (4)

1、一种磁编码装置,是具有由磁性材料形成的有在圆盘的圆周方向检测位置的狭缝的移动盘、经上述移动盘和空隙配置的磁传感器、设在上述磁传感器的背面的偏置磁铁和处理从上述磁传感器来的信号的信号处理电路的磁编码装置,其特征在于:
上述移动盘包括:具有上述位置检测用的狭缝的位置检测用的狭缝磁道、具有电机磁极检测用的狭缝的磁极检测用的狭缝磁道和设有原点位置检测用的狭缝的原点检测用的狭缝磁道,在上述各狭缝磁道的位置上配置了具有上述偏置磁铁的上述磁传感器。
2、如权利要求1记载的磁编码装置,其特征在于:将上述磁极检测用的狭缝磁道的形状作成在上述位置检测用的狭缝磁道的外径一侧设有向外径方向突出的突出部和空间部,上述原点检测用的狭缝磁道设在上述位置检测用的狭缝磁道的内径一侧。
3、如权利要求1记载的磁编码装置,其特征在于:在上述磁极检测用磁传感器与上述偏置磁铁之间设置了非磁性材料。
4、如权利要求1记载的磁编码装置,其特征在于:配置3组6个检测3相电机的极性的相信号用和倒相信号用的上述磁极检测用磁传感器,上述信号处理电路在磁极检测用信号处理电路中设置了差分放大电路,该放大电路对上述3组信号进行差分放大。
CNB988061287A 1997-04-16 1998-04-10 磁编码装置 Expired - Fee Related CN1236285C (zh)

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WO2017206496A1 (zh) * 2016-06-01 2017-12-07 江苏森尼克电子科技有限公司 一种磁编码器及其导磁码盘及导磁码盘的制备方法
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Publication number Priority date Publication date Assignee Title
KR100525845B1 (ko) * 1997-09-08 2005-11-02 가부시키가이샤 야스카와덴키 자기식 엔코더장치
JP4269246B2 (ja) * 2001-05-18 2009-05-27 株式会社安川電機 エンコーダおよびエンコーダ付モータ
US6963064B2 (en) * 2002-06-14 2005-11-08 Pem Management, Inc. Multi-resolution reflective optical incremental encoder
DE112004002011B4 (de) * 2003-10-24 2011-06-22 Kabushiki Kaisha Yaskawa Denki, Fukuoka Magnetische Kodiereinrichtung und Stellglied
JP4286739B2 (ja) * 2004-07-14 2009-07-01 三菱電機株式会社 磁気検出装置
JP5046850B2 (ja) * 2007-10-22 2012-10-10 株式会社森精機製作所 位置検出装置、及び、バイアス磁界発生装置
EP2642252A1 (en) 2012-03-22 2013-09-25 Schleifring und Apparatebau GmbH Magnetic position encoder
CN102868279B (zh) * 2012-09-12 2014-09-10 沈阳市蓝光自动化技术有限公司 低速电机磁旋转编码器
CN103148774B (zh) * 2013-03-11 2016-08-24 黎友盛 起重机大小车用座标式相对位移检测磁尺
CN104333178B (zh) * 2014-11-15 2017-08-22 欧佩德伺服电机节能系统有限公司 一种电机编码器转换连接结构的安装方法
WO2023135886A1 (ja) * 2022-01-17 2023-07-20 タカノ株式会社 回転駆動装置

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5940856U (ja) * 1982-09-06 1984-03-15 富士重工業株式会社 回転数検出器
GB8322886D0 (en) * 1983-08-25 1983-09-28 Lucas Ind Plc Transducer means
JPH0552584A (ja) * 1991-08-28 1993-03-02 Toshiba Corp 磁気式エンコーダ
US5444370A (en) * 1993-03-18 1995-08-22 Honeywell Inc. Magnetic angular position sensor with two magnetically sensitive components arranged proximate two target tracks having complimentary magnetic and nonmagnetic segments
GB9311694D0 (en) * 1993-06-07 1993-07-21 Switched Reluctance Drives Ltd Electric machine rotor prosition encoder
JPH0731116A (ja) * 1993-07-06 1995-01-31 Matsushita Electric Ind Co Ltd ブラシレスモータ用磁気式エンコーダ
JPH0743375A (ja) * 1993-07-30 1995-02-14 Matsushita Electric Works Ltd 回転検出装置
DE4333800A1 (de) * 1993-10-04 1995-04-06 Deutsche Automobilgesellsch Vorrichtung zur Drehwinkeldetektierung
JPH07209315A (ja) * 1994-01-26 1995-08-11 Mitsubishi Electric Corp 電磁式回転センサ
DE19513692C1 (de) * 1995-04-11 1996-07-18 Stegmann Max Antriebstech Drehwinkelmeßsystem
US5774074A (en) * 1997-01-21 1998-06-30 Hewlett-Packard Company Multi-track position encoder system

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100390505C (zh) * 2006-01-20 2008-05-28 安徽金海迪尔信息技术有限责任公司 绝对式多圈磁编码器
CN101421589B (zh) * 2006-04-10 2012-08-08 铁姆肯美国公司 转向装置位置检测系统和方法
WO2010124580A1 (zh) * 2009-04-30 2010-11-04 浙江关西电机有限公司 位置检测装置及其信号处理装置和方法
CN101846531A (zh) * 2010-05-28 2010-09-29 江苏斯沃特电气有限公司 多极复合式磁编码器
CN102042840A (zh) * 2010-09-07 2011-05-04 株洲威森机车配件有限公司 一种双路格雷码磁编码装置
CN102042840B (zh) * 2010-09-07 2014-05-07 株洲威森机车配件有限公司 一种双路格雷码磁编码装置
CN104303020A (zh) * 2012-05-22 2015-01-21 三菱电机株式会社 磁式旋转角检测器
CN104303020B (zh) * 2012-05-22 2016-08-31 三菱电机株式会社 磁式旋转角检测器
WO2017206496A1 (zh) * 2016-06-01 2017-12-07 江苏森尼克电子科技有限公司 一种磁编码器及其导磁码盘及导磁码盘的制备方法
CN106767955A (zh) * 2016-12-27 2017-05-31 江西省智成测控技术研究所有限责任公司 一种基于磁编码器的离轴式绝对角度测量的实现方法
WO2020010649A1 (zh) * 2018-07-13 2020-01-16 深圳永士达医疗科技有限公司 Oct用直驱模组

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DE69811652D1 (de) 2003-04-03
US6160499A (en) 2000-12-12
KR100573461B1 (ko) 2006-04-24
EP0977016A4 (en) 2000-07-05
CN1236285C (zh) 2006-01-11
DE69811652T2 (de) 2003-09-18
EP0977016A1 (en) 2000-02-02
KR20010006316A (ko) 2001-01-26
EP0977016B1 (en) 2003-02-26
WO1998046968A1 (fr) 1998-10-22

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