CN103308077A - Magnetic potentiometer - Google Patents
Magnetic potentiometer Download PDFInfo
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- CN103308077A CN103308077A CN2013100724070A CN201310072407A CN103308077A CN 103308077 A CN103308077 A CN 103308077A CN 2013100724070 A CN2013100724070 A CN 2013100724070A CN 201310072407 A CN201310072407 A CN 201310072407A CN 103308077 A CN103308077 A CN 103308077A
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- magnet
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- magnetic sensor
- potentiometer
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Abstract
The invention discloses a magnetic potentiometer, which pursues the miniaturization, and can be used to improve the degree of freedom of assembly. A magnetic collection board (3) is disposed on a side of a back surface of a side opposite to a magnetic field detection part (magnetic induction surface) of a magnet (1) and a magnetic sensor (a Hall element or a MR element) (2). The magnetic collection board (3) can be used to absorb a part of magnetic flow of the magnet (1), and therefore the magnetic flow density acting on the magnetic sensor (2) can be reduced, a size (W) in a width direction is not required to be increased, and a gap (G) between the magnet (1) and the magnetic sensor (2) can be reduced, and the miniaturization can be achieved. The magnetic collection board (3) is not disposed between the magnet (1) and the magnetic sensor (2), and therefore the gap (G) between the magnet (1) and the magnetic sensor (2) can be realized, and the degree of freedom can be improved. Because the miniaturization is achieved, the assembly error between the magnet (1) and the magnetic sensor (2) can be reduced, and as a result, the detection error can be reduced.
Description
Technical field
The present invention relates to adopt the magneto-potentiometer of magnet and Magnetic Sensor.
Background technology
In the context of detection of the anglec of rotation of electric valve actuating mechanism etc., always use potentiometer.In the detection mode of the anglec of rotation of this potentiometer, contact and contactless is arranged.There is the deteriorated problem that causes because of wearing and tearing in the contact, relative with it, there is not such problem in contactless, the life-span is long.
In contactless, roughly can divide the optical profile type of mainly utilizing optical transmission or reflection and the magnetic that detects the magnetic direction variation.Optical profile type is subject to the impact of dust, and is relative with it, and magnetic is not vulnerable to the impact of dust, is expected to the potentiometer of using as electric valve actuating mechanism.
Patent documentation
[patent documentation 1] JP 2004-184319 communique
Summary of the invention
Yet the most sensing ranges of the potentiometer of magnetic are narrow, and volume is large.Fig. 6 illustrates the major part of existing magneto-potentiometer.Among the figure, the 1st, the magnet of circular plate type, the 2nd, detect the Magnetic Sensor of the direction in the magnetic field that this magnet 1 forms.Magnet 1 as shown in Figure 7, its side radially is geomagnetic into the S utmost point, the opposing party is geomagnetic into the N utmost point, is rotated as the axle center take its center O.
As Magnetic Sensor 2, use Hall element or MR element (magneto-resistance effect element), the detection magnetic field range with regulation.Therefore excessive in the magnetic field that magnet 1 sends and when not satisfying this detections magnetic field range, then be necessary shown in Fig. 8 (a) like that, strengthen the clearance G between magnet 1 and the Magnetic Sensor 2, or such shown in Fig. 8 (b), the diameter phi of increasing magnet 1.Therefore, in the situation of Fig. 8 (a), it is large that the size L of short transverse becomes, and in the situation of Fig. 8 (b), it is large that the size W of Width becomes, the miniaturization difficult.
For these reasons, the most volumes of magneto-potentiometer are larger, when not having sufficient space maybe can transform the degree of freedom of existing confined state, with the displacement of small-sized contact-cup anemometer be difficult, in the electric valve actuating mechanism before this, use constantly the potentiometer of contact always.
In patent documentation 1, recorded and narrated the structure that the collection chinaware is set between magnet 1 and Magnetic Sensor 2 again.At this moment, because the collection chinaware absorbs a part from the magnetic flux of magnet 1, so reduced to act on the magnetic flux density of Magnetic Sensor 2, can not strengthen the size W of Width and the clearance G between magnet 1 and the Magnetic Sensor 2 is reduced.
Yet, in the structure shown in this patent documentation 1, because the collection chinaware between magnet 1 and Magnetic Sensor 2, therefore can not reach Magnetic Sensor 2 in the thickness range of collection chinaware near magnet 1.Therefore, can not freely set the clearance G between magnet 1 and the Magnetic Sensor 2, the degree of freedom of assembling has reduced.
The present invention does for solving such problem, and its purpose is to provide can seek the magneto-potentiometer that miniaturization improves the assembling degree of freedom simultaneously.
Be again, can reduce the rigging error of magnet 1 and Magnetic Sensor 2 by miniaturization, its result provides the magneto-potentiometer that can reduce to detect error.
For reaching the present invention of this purpose, in possessing the magneto-potentiometer of magnet and the Magnetic Sensor of the direction that detects the magnetic field that this magnet forms, it is characterized in that, on reverse side one side of the test section opposite side in magnet and magnetic field Magnetic Sensor, collection magnetism board is set.
According to the present invention, because collection magnetism board sucks the part from the magnetic flux of magnet, therefore reduce to act on the magnetic flux density of Magnetic Sensor, just can not strengthen the size W of Width and reduce gap between magnet and the Magnetic Sensor.Thus, seek the miniaturization of magneto-potentiometer, the use in electric valve actuating mechanism becomes possibility.
Again, according to the present invention, owing in reverse side one side with magnetic-field detecting unit opposite side Magnetic Sensor magnet collection magnetism board being set, namely owing between magnet and Magnetic Sensor, collector plate not being set, therefore the clearance G of freely setting between magnet and the Magnetic Sensor becomes possibility, has improved the degree of freedom of assembling.
The effect of invention
According to the present invention, owing in reverse side one side with magnetic-field detecting unit opposite side Magnetic Sensor magnet collection magnetism board being set, therefore collection magnetism board just sucks the part in the magnetic field that is formed by magnet, just can not strengthen the size W of Width and reduce clearance G between magnet and the Magnetic Sensor, seek miniaturization and the use in electric valve actuating mechanism.Again, can freely set the clearance G between magnet and the Magnetic Sensor, the degree of freedom of assembling is just improved.Again, by miniaturization, can reduce the rigging error of magnet and Magnetic Sensor, its result just can reduce to detect error.
Description of drawings
Fig. 1 illustrates the figure of major part of an embodiment of magneto-potentiometer of the present invention.
Fig. 2 is the vertical view of collection magnetism board that is bonded on the magnet lower surface of this magneto-potentiometer.
Fig. 3 illustrates the structural map of the major part of the electric valve actuating mechanism that uses this magneto-potentiometer.
Fig. 4 is the stereographic map of the Measuring opening section in this electric valve actuating mechanism.
Fig. 5 is the exploded perspective view of the Measuring opening section in this electric valve actuating mechanism.
Fig. 6 illustrates the figure of the major part of existing magneto-potentiometer.
Fig. 7 is the vertical view that is used for the magnet of this magneto-potentiometer.
Fig. 8 is the illustration that strengthens the clearance G between magnet and the Magnetic Sensor and the illustration that strengthens magnet diameter φ.
Embodiment
Below, describe with reference to the accompanying drawings embodiments of the present invention in detail.
Fig. 1 is the figure of major part of an embodiment of magneto-potentiometer of the present invention.Among the figure, the inscape that the symbolic representation identical with Fig. 8 and the inscape that illustrated with reference to Fig. 8 are identical or equal, its explanation is omitted.
In this magneto-potentiometer 100, on reverse side one side (lower surface) of magnet 1 and magnetic-field detecting unit Magnetic Sensor 2 (sense magnetic surface) 2a opposite side (upper surface), engage collection magnetism board 3.Collection magnetism board 3 is and magnet 1 same diameter discoideus (with reference to Fig. 2), has thickness t.
Again, collection magnetism board 3 is ferromagnetism bodies, is made of high permeability materials.So-called ferromagnetism body refers to easily the material with upper magnetic, and is the very large material of magnetic permeability mu.Be present among the tellurian material and ferromagnetism element of volume at normal temperatures only has three kinds of iron, nickel, cobalt.
In this magneto-potentiometer 100, as collection magnetism board 3, normal operation is called the steel plate of the ferromagnetism body of electromagnetic steel plate.Electromagnetic steel plate is carried out modifier treatment, manufacture and make the magnetization characteristic that obtains homogeneous in all directions with the same direction of easy magnetized crystal orientation or steel plate, is generally used in motor or the transformer etc.Again, electromagnetic steel plate has the series of the thickness (0.23,0.27,0.30,0.35) of stipulating among the JISC2553, at electric field intensity 800[A/m] in magnetic flux density (B
H) be 1.78～1.88[T] above (magnetic permeability mu of the said situation in the left side=1770～1870 (by 1[T]=795800[A/m], B=μ H calculates)).
In this magneto-potentiometer 100, make collection magnetism board 3 suctions from the part of the magnetic flux of magnet 1, reduce to act on the magnetic flux density of Magnetic Sensor 2, make the magnetic field of the sense magnetic surface 2a of Magnetic Sensor 2 be no more than the detection magnetic field range.Therefore, need not to strengthen the size W of Width, and can reduce the clearance G between magnet 1 and the Magnetic Sensor 2, seek the miniaturization of magneto-potentiometer 100, and can in electric valve actuating mechanism, use.
Again, in this magneto-potentiometer 100, because reverse side one side at sense magnetic surface 2a opposite side magnet 1 and Magnetic Sensor 2 arranges collection magnetism board 3, namely owing between magnet 1 and Magnetic Sensor 2, collector plate 3 not being set, therefore can freely set the clearance G between magnet 1 and the Magnetic Sensor 2.That is, the thickness t by adjusting collection magnetism board 3 etc. can be adjusted the amount of the magnetic flux that collection magnetism board 3 sucks, as far as possible with Magnetic Sensor 2 near magnet 1 etc., can freely set clearance G.Like this, just improved the degree of freedom of assembling.
Fig. 3 illustrates the structure of the major part of the electric valve actuating mechanism 200 that uses this magneto-potentiometer 100.Among the figure, 4 is valve body, 5 for being connected to the axle on the valve body 4,6 for being attached to gear on the axle, and 7 is housing, 8 covers that arrange for the loam cake as housing, 9 is back-up ring, 10 is motor, and 11,12 for being delivered to the revolving force of motor 10 gear on the gear 6, and 13 is the installing plate of motor 10 and housing 7 etc.
In this motorized valve topworks 200, the revolving force of motor 10 is delivered to not shown valve body through gear 11,12, and on the other hand, this revolving force is passed to gear 6, and axle 5 is subject to this revolving force and rotates.
In housing 7, the magnet holder 14 chimeric rearward end that are fixed in axle 5, magnet 1 is held on this magnet holder 14.Collection magnetism board 3 is engaged on the lower surface 1b of magnet 1.IC fixed head (non-magnetic member) 15 is set on the top of housing 7, and printed panel 16 is fixed on this IC fixed head 15.Lower surface 16a at printed panel 16 arranges Magnetic Sensor 2, and its sense magnetic surface 2a is across the upper surface 1a of clearance G facing to magnet 1.
Among Fig. 3, claim the Measuring opening section that is configured to of housing 17 sides, claim the motor section that is configured to of motor 10 sides, represent Measuring opening section with symbol 201, represent motor section with symbol 202.Measuring opening section 201 adopts the structure of above-mentioned magneto-potentiometer 100.Fig. 4 illustrates the stereographic map of Measuring opening section 201.Fig. 5 illustrates the exploded perspective view of Measuring opening section 201.
Again, in the above-described embodiment, collection magnetism board 3 is joined on the lower surface 1b of magnet 1, but also can make the lower surface 1b facing to magnet 1 with the state that separates collection magnetism board 3 is set.Again, also can differ is decided to be circular plate shape with magnet 1 same diameter, also can or diameter reduction, or change its shape.Again, magnet 1 also not necessarily is limited to circular plate type, also can be clavate etc.
[expansion of embodiment]
Abovely with reference to embodiment the present invention has been described.But the invention is not restricted to above-mentioned embodiment.On structure of the present invention and details, can in the scope of technological thought of the present invention, do the accessible all changes of technician.
[explanation of symbol]
1 magnet, the 1a upper surface, the 1b lower surface,
2 Magnetic Sensors, 2a feels magnetic surface, 3 collection magnetism boards,
5 axles, 6 gears, 7 housings,
8 covers, 9 back-up rings, 10 motors,
11,12 gears, 13 installing plates, 14 magnet holder,
The 15IC fixed head, 16 printed panels, 17 return springs,
100 magneto-potentiometers, 200 electric valve actuating mechanisms, 201 Measuring opening sections,
202 motor section.
Claims (3)
1. magneto-potentiometer possesses the Magnetic Sensor of magnet and the direction that detects the magnetic field that this magnet forms, it is characterized in that,
On reverse side one side of described magnet and magnetic-field detecting unit opposite side described Magnetic Sensor, collection magnetism board is set.
2. magneto-potentiometer as claimed in claim 1 is characterized in that,
Described collection magnetism board is engaged on the described magnet.
3. magneto-potentiometer as claimed in claim 1 is characterized in that,
Described collection magnetism board is the ferromagnetism body, and is high permeability materials.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-053207 | 2012-03-09 | ||
| JP2012053207A JP2013186058A (en) | 2012-03-09 | 2012-03-09 | Magnetic type potentiometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103308077A true CN103308077A (en) | 2013-09-18 |
Family
ID=49133561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100724070A Pending CN103308077A (en) | 2012-03-09 | 2013-03-07 | Magnetic potentiometer |
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| Country | Link |
|---|---|
| JP (1) | JP2013186058A (en) |
| CN (1) | CN103308077A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2074056U (en) * | 1990-07-09 | 1991-03-27 | 北京市通县福利电子器材厂 | High-sensitive indium antimonide magnetic sensing potentiometer |
| CN2361856Y (en) * | 1999-01-04 | 2000-02-02 | 张国生 | Energy-saving gas purifier |
| CN2368139Y (en) * | 1999-04-30 | 2000-03-08 | 王启彤 | Magnetic-sensitive contactless potentiometer |
| CN2373583Y (en) * | 1998-11-13 | 2000-04-12 | 朱国成 | Magnetization oil-saving purifier |
| JP2003139560A (en) * | 2001-10-30 | 2003-05-14 | Mitsubishi Electric Corp | Rotational position detector |
| JP2004184319A (en) * | 2002-12-05 | 2004-07-02 | Nippon Soken Inc | Magnetic location detection device |
| CN201311272Y (en) * | 2008-12-15 | 2009-09-16 | 银川英奥特自控有限公司 | Non-contact high-precision angle sensor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6326781B1 (en) * | 1999-01-11 | 2001-12-04 | Bvr Aero Precision Corp | 360 degree shaft angle sensing and remote indicating system using a two-axis magnetoresistive microcircuit |
| WO2003016829A1 (en) * | 2001-08-07 | 2003-02-27 | Namiki Seimitsu Houseki Kabushiki Kaisha | Magnetic micro encoder and micro motor |
-
2012
- 2012-03-09 JP JP2012053207A patent/JP2013186058A/en active Pending
-
2013
- 2013-03-07 CN CN2013100724070A patent/CN103308077A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2074056U (en) * | 1990-07-09 | 1991-03-27 | 北京市通县福利电子器材厂 | High-sensitive indium antimonide magnetic sensing potentiometer |
| CN2373583Y (en) * | 1998-11-13 | 2000-04-12 | 朱国成 | Magnetization oil-saving purifier |
| CN2361856Y (en) * | 1999-01-04 | 2000-02-02 | 张国生 | Energy-saving gas purifier |
| CN2368139Y (en) * | 1999-04-30 | 2000-03-08 | 王启彤 | Magnetic-sensitive contactless potentiometer |
| JP2003139560A (en) * | 2001-10-30 | 2003-05-14 | Mitsubishi Electric Corp | Rotational position detector |
| JP2004184319A (en) * | 2002-12-05 | 2004-07-02 | Nippon Soken Inc | Magnetic location detection device |
| CN201311272Y (en) * | 2008-12-15 | 2009-09-16 | 银川英奥特自控有限公司 | Non-contact high-precision angle sensor |
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| Publication number | Publication date |
|---|---|
| JP2013186058A (en) | 2013-09-19 |
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Application publication date: 20130918 |