WO2014073055A1 - Position detection device - Google Patents
Position detection device Download PDFInfo
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- WO2014073055A1 WO2014073055A1 PCT/JP2012/078861 JP2012078861W WO2014073055A1 WO 2014073055 A1 WO2014073055 A1 WO 2014073055A1 JP 2012078861 W JP2012078861 W JP 2012078861W WO 2014073055 A1 WO2014073055 A1 WO 2014073055A1
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- magnetic body
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- magnetic field
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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
Abstract
Description
実施の形態1.
図1はこの発明の実施の形態1における位置検出装置の基本構成図を示しており、ステータとなる第1の固定磁性体10および第2の固定磁性体20と、マグネットの移動磁界発生体30と、ホール素子の磁気センサ40と、非磁性のスペーサ50とを備えている。 Hereinafter, in order to explain the present invention in more detail, modes for carrying out the present invention will be described with reference to the accompanying drawings.
Embodiment 1 FIG.
FIG. 1 shows a basic configuration diagram of a position detection apparatus according to Embodiment 1 of the present invention, in which a first fixed
他方、第2の固定磁性体20の移動磁界発生体30に対向する側の面(先述の第1の固定磁性体10の対向面)は、移動磁界発生体30の移動方向Xに平行な直線部21が形成されている。従って、移動磁界発生体30は、第1の固定磁性体10と第2の固定磁性体20の対向面で構成されるギャップ中を、スペーサ50を間に挟んで第2の固定磁性体20の直線部21に磁力ではり付いた状態で移動方向Xに摺動することになる。 A
On the other hand, the surface of the second fixed
また、スペーサ50で被覆することにより、移動磁界発生体30が破損した場合の飛散を防止できる。 In the position detection device according to the first embodiment, the
Moreover, by covering with the
図2は、スペーサ50を拡大した正面図である。図2に示すように、移動磁界発生体30を内包したスペーサ50の、第2の固定磁性体20の直線部21にはり付く側の厚みA、第1の固定磁性体10の曲線部11に対向する側の厚みBとすると、A<Bの寸法関係になるように、移動磁界発生体30をインサート成形する。これにより、移動磁界発生体30から第1の固定磁性体10までの距離より、移動磁界発生体30から第2の固定磁性体20までの距離が短くなるように移動磁界発生体30が保持され、移動磁界発生体30と第1の固定磁性体10との間に作用する磁力よりも移動磁界発生体30と第2の固定磁性体20との間に作用する磁力の方が大きくなる。よって、移動磁界発生体30が第2の固定磁性体20にはり付きやすくなる。
また、図2の場合、スペーサ50の厚みA,Bを調整するだけでよいので、容易に製造でき、生産性向上およびコスト低減の効果が得られる。 Here, a preferred configuration example for attaching the moving
FIG. 2 is an enlarged front view of the
Further, in the case of FIG. 2, it is only necessary to adjust the thicknesses A and B of the
なお、磨耗分の厚みを確保した場合でも、この磨耗分の厚みを含めた厚みAより厚みBの方が厚くなるよう寸法を設定する。 The thickness of the wear may be determined based on the measurement result of the wear amount of the
Even when the thickness for the wear is secured, the dimension is set so that the thickness B is thicker than the thickness A including the thickness for the wear.
図3に、移動磁界発生体30とスペーサ50を、第1の固定磁性体10から第2の固定磁性体20の方向に切断した断面図を示す。図3(a)に示すように、移動磁界発生体30の断面が三角形状になるように構成する。また例えば、図3(b)に示すように、移動磁界発生体30の断面が凸形状になるように構成する。また例えば、図3(c)に示すように、移動磁界発生体30の、第1の固定磁性体10の曲線部11に対向する極性面の中央部を凹ませて、断面が凹形状になるように構成する。 As a preferred configuration example for attaching the moving
FIG. 3 is a cross-sectional view of the moving
好ましくは、移動磁界発生体30の体積が第2の固定磁性体20側に半分以上を占めるように構成する。 In any of the shapes of FIGS. 3A to 3C, the volume of the moving
Preferably, the configuration is such that the volume of the moving
また、図2に示したスペーサ50の厚みA,Bの寸法関係の工夫と、図3に示した移動磁界発生体30の形状の工夫のうちのいずれか一方のみ実施してもよいし、両方を組み合わせて実施してもよい。 In addition, in FIG. 3, although the cross-sectional triangle, the convex shape, and the concave shape were illustrated, the modified example of the moving
Further, only one of the dimensional relationship between the thicknesses A and B of the
図5は、本実施の形態2に係る位置検出装置の基本構成を示す正面図であり、図1~図4と同一または相当の部分については同一の符号を付し説明を省略する。上記実施の形態1ではマグネットの移動磁界発生体30を位置検出対象にしたが、本実施の形態2では、移動磁性体70を位置検出対象とする。 Embodiment 2. FIG.
FIG. 5 is a front view showing a basic configuration of the position detection apparatus according to the second embodiment, and the same or corresponding parts as those in FIGS. 1 to 4 are denoted by the same reference numerals and description thereof is omitted. In the first embodiment, the moving
Claims (6)
- N極の極性面およびその裏側にS極の極性面を有し、往復運動する駆動軸に取り付けられて当該NS極が並ぶ磁極方向と直交する方向に移動する移動磁界発生体と、
前記移動磁界発生体の一方の極性面に対向して配置される曲線部を有する第1の固定磁性体と、
前記移動磁界発生体のもう一方の極性面に対向する位置に配置され、前記移動磁界発生体を間にして前記第1の固定磁性体の曲線部に対向する、前記移動磁界発生体の移動方向に平行な直線部を有する第2の固定磁性体と、
前記第1の固定磁性体と前記第2の固定磁性体の間に設置され、前記駆動軸の往復運動に応じて前記移動磁界発生体と前記第1の固定磁性体の曲線部との間の距離が変化することで、通過する磁束が変化することから前記移動磁界発生体の位置を検出する磁気センサとを備え、
前記移動磁界発生体は、少なくとも前記第1の固定磁性体に対向する側および前記第2の固定磁性体に対向する側に設けられた非磁性のスペーサを有し、当該スペーサを間に挟んで前記第2の固定磁性体の直線部に磁力ではり付くことを特徴とする位置検出装置。 A moving magnetic field generator that has an N-polar polarity surface and an S-polarity surface on the back side thereof, is attached to a reciprocating drive shaft, and moves in a direction perpendicular to the magnetic pole direction in which the NS poles are arranged;
A first fixed magnetic body having a curved portion disposed opposite to one polar surface of the moving magnetic field generator;
A moving direction of the moving magnetic field generator disposed at a position facing the other polar surface of the moving magnetic field generator and facing the curved portion of the first fixed magnetic body with the moving magnetic field generator interposed therebetween A second fixed magnetic body having a linear portion parallel to
It is installed between the first fixed magnetic body and the second fixed magnetic body, and between the moving magnetic field generator and the curved portion of the first fixed magnetic body according to the reciprocating motion of the drive shaft. A magnetic sensor for detecting the position of the moving magnetic field generator because the magnetic flux passing through the distance changes,
The moving magnetic field generator has a nonmagnetic spacer provided on at least a side facing the first fixed magnetic body and a side facing the second fixed magnetic body, with the spacer interposed therebetween. A position detecting device characterized by sticking to a linear portion of the second fixed magnetic body with a magnetic force. - 前記スペーサは、前記第2の固定磁性体に対向する側の厚みより、前記第1の固定磁性体に対向する側の厚みの方が大きいことを特徴とする請求項1記載の位置検出装置。 2. The position detecting device according to claim 1, wherein the thickness of the spacer on the side facing the first fixed magnetic body is larger than the thickness on the side facing the second fixed magnetic body.
- 前記スペーサの前記第2の固定磁性体に対向する側の厚みは、前記第2の固定磁性体の直線部上を所定の回数摺動した場合の磨耗量に相当する厚みを確保した厚みであることを特徴とする請求項2記載の位置検出装置。 The thickness of the spacer facing the second fixed magnetic body is a thickness that secures a thickness corresponding to the amount of wear when sliding a predetermined number of times on the linear portion of the second fixed magnetic body. The position detection device according to claim 2.
- 前記移動磁界発生体は、前記第1の固定磁性体側の体積より前記第2の固定磁性体側の体積の方が大きい形状であることを特徴とする請求項1記載の位置検出装置。 The position detecting device according to claim 1, wherein the moving magnetic field generator has a shape in which the volume on the second fixed magnetic body side is larger than the volume on the first fixed magnetic body side.
- 前記移動磁界発生体は、前記第1の固定磁性体から前記第2の固定磁性体の方向の断面が三角形状、凸形状、または凹形状であることを特徴とする請求項4記載の位置検出装置。 5. The position detection according to claim 4, wherein the moving magnetic field generator has a triangular, convex, or concave cross section in the direction from the first fixed magnetic body to the second fixed magnetic body. apparatus.
- 往復運動する駆動軸に取り付けられて移動する移動磁性体と、
曲線部を有する第1の固定磁性体と、
前記移動磁性体を間にして前記第1の固定磁性体の曲線部に対向する、前記移動磁性体の移動方向に平行な直線部を有する第2の固定磁性体と、
前記第1の固定磁性体と前記第2の固定磁性体の間に設置され、前記第1の固定磁性体の曲線部と前記第2の固定磁性体の直線部を通る磁界を発生させる固定磁界発生体と、
前記固定磁界発生体の磁界上に配置され、前記駆動軸の往復運動に応じて前記移動磁性体と前記第1の固定磁性体の曲線部との間の距離が変化することで、通過する磁束が変化することから前記移動磁性体の位置を検出する磁気センサとを備え、
前記移動磁性体は、少なくとも前記第1の固定磁性体に対向する側および前記第2の固定磁性体に対向する側に設けられた非磁性のスペーサを有し、当該スペーサを間に挟んで前記第2の固定磁性体の直線部に前記固定磁界発生体の磁力ではり付くことを特徴とする位置検出装置。 A moving magnetic body that is mounted on a reciprocating drive shaft and moves;
A first fixed magnetic body having a curved portion;
A second fixed magnetic body having a linear portion parallel to the moving direction of the moving magnetic body and facing the curved portion of the first fixed magnetic body with the moving magnetic body in between;
A fixed magnetic field that is installed between the first fixed magnetic body and the second fixed magnetic body and generates a magnetic field that passes through the curved portion of the first fixed magnetic body and the straight portion of the second fixed magnetic body. The generator,
Magnetic flux that is disposed on the magnetic field of the fixed magnetic field generator and passes through when the distance between the moving magnetic body and the curved portion of the first fixed magnetic body changes according to the reciprocating motion of the drive shaft. A magnetic sensor for detecting the position of the moving magnetic body from
The moving magnetic body has at least a nonmagnetic spacer provided on a side facing the first fixed magnetic body and a side facing the second fixed magnetic body, and the moving magnetic body sandwiches the spacer in between. A position detecting device, characterized in that the linear portion of the second fixed magnetic body is stuck to the magnetic force of the fixed magnetic field generator.
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PCT/JP2012/078861 WO2014073055A1 (en) | 2012-11-07 | 2012-11-07 | Position detection device |
CN201290001320.3U CN204988166U (en) | 2012-11-07 | 2012-11-07 | Position detection device |
JP2014545488A JP5675009B2 (en) | 2012-11-07 | 2012-11-07 | Position detection device |
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PCT/JP2012/078861 WO2014073055A1 (en) | 2012-11-07 | 2012-11-07 | Position detection device |
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Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH07146102A (en) * | 1993-11-25 | 1995-06-06 | Fujitsu Ltd | Position detector |
JP2003065705A (en) * | 2001-08-27 | 2003-03-05 | Nippon Soken Inc | Displacement sensor |
WO2003062741A2 (en) * | 2002-01-23 | 2003-07-31 | Robert Bosch Gmbh | Path sensor with an magnetoelectric transformer element |
JP2003315088A (en) * | 2002-01-23 | 2003-11-06 | Robert Bosch Gmbh | Distance sensor having magnetic electric conversion element |
JP2006073711A (en) * | 2004-09-01 | 2006-03-16 | Daido Steel Co Ltd | Non-contact variable resistor |
WO2007069680A1 (en) * | 2005-12-16 | 2007-06-21 | Asahi Kasei Emd Corporation | Position detector |
JP2010060339A (en) * | 2008-09-02 | 2010-03-18 | Alps Electric Co Ltd | Movement detection device using magnet |
-
2012
- 2012-11-07 JP JP2014545488A patent/JP5675009B2/en active Active
- 2012-11-07 CN CN201290001320.3U patent/CN204988166U/en not_active Expired - Lifetime
- 2012-11-07 WO PCT/JP2012/078861 patent/WO2014073055A1/en active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07146102A (en) * | 1993-11-25 | 1995-06-06 | Fujitsu Ltd | Position detector |
JP2003065705A (en) * | 2001-08-27 | 2003-03-05 | Nippon Soken Inc | Displacement sensor |
WO2003062741A2 (en) * | 2002-01-23 | 2003-07-31 | Robert Bosch Gmbh | Path sensor with an magnetoelectric transformer element |
JP2003315088A (en) * | 2002-01-23 | 2003-11-06 | Robert Bosch Gmbh | Distance sensor having magnetic electric conversion element |
JP2006073711A (en) * | 2004-09-01 | 2006-03-16 | Daido Steel Co Ltd | Non-contact variable resistor |
WO2007069680A1 (en) * | 2005-12-16 | 2007-06-21 | Asahi Kasei Emd Corporation | Position detector |
JP2010060339A (en) * | 2008-09-02 | 2010-03-18 | Alps Electric Co Ltd | Movement detection device using magnet |
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CN204988166U (en) | 2016-01-20 |
JPWO2014073055A1 (en) | 2016-09-08 |
JP5675009B2 (en) | 2015-02-25 |
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