JPH01219611A - Leakage magnetic field type potentiometer - Google Patents
Leakage magnetic field type potentiometerInfo
- Publication number
- JPH01219611A JPH01219611A JP63046312A JP4631288A JPH01219611A JP H01219611 A JPH01219611 A JP H01219611A JP 63046312 A JP63046312 A JP 63046312A JP 4631288 A JP4631288 A JP 4631288A JP H01219611 A JPH01219611 A JP H01219611A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- leakage magnetic
- leakage
- magnetic
- permanent magnet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 claims abstract description 37
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 5
- 239000000696 magnetic material Substances 0.000 description 4
- 239000000758 substrate Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 239000002279 physical standard Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Landscapes
- Adjustable Resistors (AREA)
- Hall/Mr Elements (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
(産業上の利用分野)
本発明は、永久磁石と磁界強度検出器とを用いたポテン
ショメータに関し、特に、永久磁石に接続した閉磁路の
漏洩磁界を利用する漏洩磁界型ポテンショメータに関す
る。[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a potentiometer using a permanent magnet and a magnetic field strength detector, and in particular, to a potentiometer that uses a permanent magnet and a magnetic field strength detector. This invention relates to a leakage magnetic field type potentiometer to be used.
(従来の技術)
永久磁石の放射磁界を利用したポテンショメータは従然
より紹介されていたが、放射磁界の減衰が大きいために
検出範囲が極めて小さく、用途が限られていた。(Prior Art) Potentiometers that utilize the radiated magnetic field of a permanent magnet have been introduced for some time, but due to the large attenuation of the radiated magnetic field, their detection range is extremely small and their applications are limited.
この種の問題点を解決するものとして、本出願人等は、
永久磁石に閉磁路を結合し、該閉磁路の漏洩磁界を利用
する漏洩磁界型ポテンショメータを発明し、先に出願、
した(特開昭62−63811)。In order to solve this kind of problem, the present applicant et al.
Invented a leakage magnetic field type potentiometer that combines a permanent magnet with a closed magnetic path and utilizes the leakage magnetic field of the closed magnetic path, and filed an application earlier.
(Japanese Patent Application Laid-Open No. 62-63811).
その開示内容の一例を具体的に説明すると、1対の平行
な平板状磁性体の両端に磁力の等しい永久磁石をそれぞ
れ結合して閉磁路を構成し、該閉磁路の内側に移動可能
な磁気検出素子を配したポテンショメータということに
なる。それぞれの平板状磁性体は永久磁石の磁気をその
延びる方向に有効に伝搬し、それらの間には漏洩磁界を
生じる。To specifically explain one example of the disclosed content, a closed magnetic path is constructed by coupling permanent magnets with equal magnetic force to both ends of a pair of parallel flat magnetic bodies, and a movable magnetic field is formed inside the closed magnetic path. This is a potentiometer equipped with a detection element. Each flat magnetic body effectively propagates the magnetism of the permanent magnet in the direction in which it extends, and a leakage magnetic field is generated between them.
つまり、この漏洩磁界を利用することにより磁気検出素
子の検出可能範囲を飛躍的に拡大し、磁気利用のポテン
ショメータの実用性を高めた。In other words, by utilizing this leakage magnetic field, the detectable range of the magnetic detection element has been dramatically expanded, and the practicality of the magnetic potentiometer has been improved.
(発明が解決しようとする課題)
ところで、ポテンショメータというものが、位置あるい
は距離、角度という物理量を電気的な信号として検出す
るものである以上、この漏洩磁界型ポテンショメータに
おいてもその検出範囲の基準と電気的な基準とが一致す
ることが好ましい。(Problem to be Solved by the Invention) By the way, since a potentiometer detects physical quantities such as position, distance, and angle as electrical signals, this leakage magnetic field type potentiometer also has a detection range standard and electrical It is preferable that the standards match.
例えば、上述の先願では極性の異なる2組の磁気検出素
子をブリッジ構成し、各中点電位を差動増幅しているの
で、漏洩磁界内を平板状磁性体に沿って一端から他端に
向う距離系列においては、その出力が徐々に減衰して零
となり、さらに進むと今度は極性が反転して徐々に増加
するが、ポテンショメータとしての凡用性を高めるため
には、この出力が零となる点と物理的に設定した基準、
例えば検出範囲の中点とが一致することが重要になる。For example, in the above-mentioned prior application, two sets of magnetic detection elements with different polarities are configured as a bridge, and the midpoint potential of each is differentially amplified. In the distance series going forward, the output gradually attenuates to zero, and as it goes further, the polarity is reversed and gradually increases, but in order to increase its versatility as a potentiometer, this output should be set to zero. The point and physically set standards,
For example, it is important that the midpoint of the detection range coincides with the center point of the detection range.
しかしながら、各永久磁石および各磁性体の均衡や均一
性を厳密に追求することは困難であり、電気的な基準と
物理的な基準との一致が直ち得られることはない。However, it is difficult to strictly pursue the balance and uniformity of each permanent magnet and each magnetic body, and it is not immediately possible to match the electrical standard with the physical standard.
そこで、上記先願においては、差動増幅における基準電
位を可変抵抗器により微調することにより各基準の一致
を試みていた。これによる効果は充分に得られたが、今
回、磁気検出素子と差動増幅器とを一体化するに際して
新たな問題を生じた。Therefore, in the above-mentioned prior application, an attempt was made to match each standard by finely adjusting the reference potential in differential amplification using a variable resistor. Although a sufficient effect was obtained by this, a new problem arose when integrating the magnetic detection element and the differential amplifier.
すなわち、電気的な基準をシフトして物理的な基準に一
致させるためには、物理量を監視しながら調整を行なわ
なければならず、このためWR整用の信号線路を増設し
て可変抵抗器、あるいはこの種の;iia手段を別体で
備えなければならなくなった。In other words, in order to shift the electrical standard to match the physical standard, it is necessary to make adjustments while monitoring the physical quantity, and for this reason, a signal line for WR adjustment is added, and a variable resistor, Alternatively, it became necessary to separately provide this type of IIA means.
このことは、ポテンショメータを単に位置あるいは距離
、角度という物理量を検出するための手段として考えた
場合には大きなデメリットとなる。This is a major disadvantage when considering the potentiometer simply as a means for detecting physical quantities such as position, distance, and angle.
つまり、所望の物理量の検出とは無関係な信号線路およ
び調整素子が備わっているということはポテンショメー
タの適用あるいは小型化に制約をもたらす。In other words, the provision of signal lines and adjustment elements unrelated to the detection of a desired physical quantity imposes restrictions on the application or miniaturization of potentiometers.
本発明は、電気的な調整素子を必要とせず、退嬰性に優
れ、小型化に有利な漏洩磁界型ポテンショメータを提供
することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a leakage magnetic field type potentiometer that does not require an electrical adjustment element, has excellent regression properties, and is advantageous for miniaturization.
(発明の構成〕
(11題を解決するための手段)
上記目的を達成するために本発明においては、永久磁石
と磁性体とによりなる閉磁路と磁界強度検出手段とを相
対的に移動自在1;支持し、該閉磁路の漏洩磁界の磁界
強度を検出する漏洩磁界型ポテンショメータにおいて、
閉磁路と磁界強度検出手段との相対的な移動範囲内の漏
洩磁界の分布を変更する調整手段を備える構成とする。(Structure of the Invention) (Means for Solving Problem 11) In order to achieve the above object, in the present invention, a closed magnetic path made of a permanent magnet and a magnetic body and a magnetic field strength detection means are relatively movable. ; In a leakage magnetic field type potentiometer that supports and detects the magnetic field strength of the leakage magnetic field of the closed magnetic circuit,
The structure includes an adjusting means for changing the distribution of the leakage magnetic field within a relative movement range between the closed magnetic path and the magnetic field strength detecting means.
(作用)
閉磁路と磁界強度検出手段との相対的な移動範囲内の漏
洩磁界の分布の変更は磁界強度検出手段の検出条件の変
更を意味し、結果的には磁界強度検出手段の出力である
電気信号をシフトすることができる。この漏洩磁界の分
布の変更は、永久磁石と磁性体との接続位置あるいは磁
界強度検出手段の支持位置の変更等の物理的な処理でも
たらされるので電気的な調整素子は不必要となる。(Function) A change in the distribution of the leakage magnetic field within the relative movement range of the closed magnetic path and the magnetic field strength detection means means a change in the detection conditions of the magnetic field strength detection means, and as a result, the output of the magnetic field strength detection means changes. Certain electrical signals can be shifted. This change in the distribution of the leakage magnetic field is brought about by physical processing such as changing the connection position between the permanent magnet and the magnetic body or the support position of the magnetic field strength detection means, so that no electrical adjustment element is required.
つまり、位置あるいは距離、角度という物理量の検出に
無関係な信号線路や調整素子がなくなり、退嬰性に優れ
た、小型化に有利な漏洩磁界型ポテンショメータとなる
。In other words, there are no signal lines or adjustment elements that are unrelated to the detection of physical quantities such as position, distance, or angle, resulting in a leakage field type potentiometer that has excellent regression properties and is advantageous for miniaturization.
本発明の他の目的および特長は以下の図面を参照した実
施例説明より明らかになろう。Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.
(実施例)
第1図は本発明を一例で実施する直動式漏洩磁界型ポテ
ンショメータの縦断面図である。(Example) FIG. 1 is a longitudinal cross-sectional view of a direct-acting leakage field type potentiometer that embodies the present invention as an example.
この第1図において、1は非磁性体でなる支持円筒であ
り、その内側では一対の平板状磁性体板2および3を平
行に支持している。平板状磁性体板2および3の両端に
はほぼ等しい磁力を有する有穴矩形の永久磁石4および
5がそれぞれ磁気結合されている。In FIG. 1, reference numeral 1 denotes a support cylinder made of a non-magnetic material, and inside thereof a pair of flat magnetic plates 2 and 3 are supported in parallel. Perforated rectangular permanent magnets 4 and 5 having approximately equal magnetic force are magnetically coupled to both ends of the flat magnetic plates 2 and 3, respectively.
各永久磁石の穴部には中空の支持部材6あるいは7が回
動自在に係合しており、これら支持部材は、支持円筒1
の上下端に螺合されたキャップ8あるいは9に固着され
ている。つまり、キャップ8の回動による上下動ととも
に永久磁石4が上下動し、キャップ9の回動による上下
動とともに永久磁石5が上下動する。A hollow support member 6 or 7 is rotatably engaged in the hole of each permanent magnet, and these support members are connected to the support cylinder 1.
It is fixed to caps 8 or 9 screwed onto the upper and lower ends of the. That is, the permanent magnet 4 moves up and down as the cap 8 moves up and down as it rotates, and the permanent magnet 5 moves up and down as the cap 9 moves up and down as it rotates.
キャップ8はリング状であり、そこには非磁性体パイプ
でなる往復ロッド10が貫通している。The cap 8 is ring-shaped, and a reciprocating rod 10 made of a non-magnetic pipe passes through it.
往復ロンド10はさらに支持部材6を貫通して内方に延
び、先端には漏洩磁界検出ユニット11が固着されてい
る。The reciprocating iron 10 further extends inwardly through the support member 6, and has a leakage magnetic field detection unit 11 fixed to its tip.
漏洩磁界検出ユニット11は、第3図に示すように磁気
抵抗ブリッジ12、差動増幅器13およびフィルタ14
よりなる。磁気抵抗ブリッジ12はブリッジ接続された
4つの磁気抵抗素子12a。The leakage magnetic field detection unit 11 includes a magnetoresistive bridge 12, a differential amplifier 13, and a filter 14, as shown in FIG.
It becomes more. The magnetoresistive bridge 12 includes four bridge-connected magnetoresistive elements 12a.
12b、12cおよび12dでなり、磁気抵抗素子12
aと12cとの接続点は基準電位Vcに、12bと12
dとの接続点はグランドGNDに接続されている。各磁
気抵抗素子は同一水平面内に配置されるが、磁気抵抗素
子12aおよび12bと、12cおよび12dとでは漏
洩磁界の作用方向が相反する。つまり、磁気抵抗素子1
2aと12bとの接続点と、12cと12dとの接続点
との間の電位差は、各組の変化量の2倍となる。12b, 12c and 12d, the magnetoresistive element 12
The connection point between a and 12c is at the reference potential Vc, and the connection point between 12b and 12c is at the reference potential Vc.
The connection point with d is connected to ground GND. Although each magnetoresistive element is arranged in the same horizontal plane, the direction of action of the leakage magnetic field is opposite between the magnetoresistive elements 12a and 12b and 12c and 12d. In other words, the magnetoresistive element 1
The potential difference between the connection point between 2a and 12b and the connection point between 12c and 12d is twice the amount of change in each pair.
この電位差は差動増幅器13において増幅された後、次
段のフィルタ14において微小変動分が除去されて検出
電位信号VPとして出力される。After this potential difference is amplified by the differential amplifier 13, minute fluctuations are removed by the filter 14 at the next stage and output as the detected potential signal VP.
これら磁気抵抗ブリッジ12、差動増幅器13およびフ
ィルタ14はハイブリッドIC化されて樹脂モールドさ
れている。信号線路は定電圧Vc用、GND用および検
出電位信号VP用の3本であり、往復コンド10内を通
り外部に出る。These magnetoresistive bridge 12, differential amplifier 13, and filter 14 are made into a hybrid IC and molded with resin. There are three signal lines, one for constant voltage Vc, one for GND, and one for detected potential signal VP, which pass through the reciprocating condo 10 and exit to the outside.
このポテンショメータの基準点は支持円筒1の中点であ
る。組立状態でこの基準点の検出電位信号Vpが零とな
らないときには、漏洩磁界検出ユニット11の検出位置
を基準点に保ったまま、キャップ8または9をねじ込み
、あるいはねじ戻して永久磁石4および5を上下に動か
し、零点を調整する。この結果は;各キャップ8,9と
支持円筒1との間隙a1とa2.すなわち、永久磁石4
から基準点までの距離b1と永久磁石5から基準点まで
の距離b2とは必ずしも等しくならない。The reference point of this potentiometer is the midpoint of the support cylinder 1. When the detected potential signal Vp at this reference point does not become zero in the assembled state, the permanent magnets 4 and 5 are screwed in or unscrewed while keeping the detection position of the leakage magnetic field detection unit 11 at the reference point. Move it up and down to adjust the zero point. As a result, the gaps a1 and a2 between each cap 8, 9 and the supporting cylinder 1. That is, permanent magnet 4
The distance b1 from the permanent magnet 5 to the reference point is not necessarily equal to the distance b2 from the permanent magnet 5 to the reference point.
零点の調整を終了すると、各キャップ8および9と支持
円筒1との間隙を樹脂により固定し、外側に磁気シール
ド用の磁性体被筒を被着する。After the zero point adjustment is completed, the gaps between the caps 8 and 9 and the support cylinder 1 are fixed with resin, and a magnetic sheath for magnetic shielding is applied to the outside.
次に第2実施例を説明する。Next, a second embodiment will be explained.
第2a図は回動漏洩磁界型ポテンショメータの縦断面図
であり、第2b図はそのIIB−IIB線断面の部分図
である。FIG. 2a is a longitudinal cross-sectional view of the rotary leakage magnetic field type potentiometer, and FIG. 2b is a partial view of the cross-section taken along the line IIB-IIB.
このポテンショメータにおいては、回動シャフト20の
回動角を検出する。This potentiometer detects the rotation angle of the rotation shaft 20.
回動シャフト20は非磁性体であり、磁性体のハウジン
グ21に回動自在に係合されている。ハウジング21に
囲まれた内部では非磁性体のブラケット22が固着され
ており、ブラケット22は永久磁石23および磁性体リ
ング24を支持している。永久磁石23および磁性体リ
ング24は回動シャフト20と同心のリングを構成する
。これらは、同じく非磁性体の固定部材25に挟まれて
ブラケット22に固着される。The rotating shaft 20 is made of a non-magnetic material and is rotatably engaged with a magnetic housing 21 . A non-magnetic bracket 22 is fixed inside the housing 21, and the bracket 22 supports a permanent magnet 23 and a magnetic ring 24. The permanent magnet 23 and the magnetic ring 24 constitute a ring concentric with the rotating shaft 20. These are fixed to the bracket 22 by being sandwiched between fixing members 25, which are also made of non-magnetic material.
シャフト20の先端には磁界改善用の磁性体円板26が
螺着されている。A magnetic disc 26 for improving the magnetic field is screwed onto the tip of the shaft 20.
漏洩磁界検出ユニット27は、上記第1実施例の漏洩磁
界検出ユニット11と同様に第3図で示される如く、磁
気抵抗ブリッジ12、差動増幅器13およびフィルタ1
4よりなる。このユニット27を固着した絶縁基板28
は、ハウジング21と回動自在に係合した磁性体のキャ
ップ29に螺着されている。キャップ29には丸穴が穿
設されており、そこから漏洩磁界検出ユニット27゛に
接続された3本の信号線路が外部に出る。The leakage magnetic field detection unit 27, as shown in FIG.
Consists of 4. An insulating substrate 28 to which this unit 27 is fixed
is screwed onto a magnetic cap 29 rotatably engaged with the housing 21. A round hole is bored in the cap 29, and three signal lines connected to the leakage magnetic field detection unit 27' exit from the hole.
ところで、回動シャフト20の回動は、ブラケット22
に形成された切欠22aとハウジング21に嵌入された
ストッパ21aとの係合により規正されている0本実施
例では、この回動範囲の中心をこのポテンショメータの
基準とするが、永久磁石23および磁性体リング24の
不均一性からこの基準において漏洩磁界検出ユニット2
7は必ずしも零点を検出しない。その場合にはシャフト
20を基準に保ったまま、漏洩磁界検出ユニット27、
絶縁基板28およびキャップ29を一体で回動して零点
を調整する。この結果、漏洩磁界検出ユニット27は基
準から任意の角度c1あるいはc2だけ回転する。By the way, the rotation of the rotation shaft 20 is controlled by the bracket 22.
In this embodiment, the center of this rotation range is used as the reference of this potentiometer. Due to the non-uniformity of the body ring 24, the leakage magnetic field detection unit 2
7 does not necessarily detect the zero point. In that case, while keeping the shaft 20 as a reference, the leakage magnetic field detection unit 27,
The insulating substrate 28 and the cap 29 are rotated together to adjust the zero point. As a result, the leakage magnetic field detection unit 27 rotates by an arbitrary angle c1 or c2 from the reference.
零点の調整を終了した後は、ハウジング21の端部をか
しめてキャップ29を固定する。なお、ハウジング21
およびキャップ29は磁気シールドを構成する。After completing the zero point adjustment, the end of the housing 21 is caulked to fix the cap 29. In addition, the housing 21
And the cap 29 constitutes a magnetic shield.
以上説明したとおり、本発明においては、閉磁路と磁界
強度検出手段との相対的な移動範囲内の漏洩磁界の分布
を変更する手段により、磁界強度検出手段の検出条件を
物理的に変更し、その出力電気信号をシフトしているの
で電気的な調整素子は不必要となる。これにより実施例
説明で示したような、位置あるいは距離、角度という物
理量の検出に無関係な信号線路や調整素子が不要で、退
嬰性に優れた、小型化に有利な漏洩磁界型ポテンショメ
ータが得られる。As explained above, in the present invention, the detection conditions of the magnetic field strength detecting means are physically changed by means of changing the distribution of the leakage magnetic field within the relative movement range of the closed magnetic path and the magnetic field strength detecting means, Since the output electrical signal is shifted, electrical adjustment elements are not required. As a result, as shown in the explanation of the embodiment, there is no need for signal lines or adjustment elements unrelated to the detection of physical quantities such as position, distance, or angle, and it is possible to obtain a leakage magnetic field type potentiometer that has excellent decrementability and is advantageous for miniaturization. .
第1図は第1実施例の直動式漏洩磁界型ポテンショメー
タの縦断面図である−0
第2a図は第2実施例の回動漏洩磁界型ポテンショメー
タの縦断面図であり、第2b図はその■B−■B線断面
の部分図である。
第3図は第1および第2実施例に共通の漏洩磁界検出ユ
ニットの構成を示すブロック図である。
1:支持円筒 2,3:平板状磁性体板4.5
:永久磁石 6,7:支持部材8.9:キャップ
10:往復ロッド11:漏洩磁界検出ユニット
12 : 12 :磁気抵抗ブリッジ
13:差動増幅量 14:フィルタ20:回動シ
ャフト 21:ハウジング22ニブラケツト
23:永久磁石24:磁性体リング 25:固定
部材26:磁界改善用磁性体円板
27:漏洩磁界検出ユニット
28:絶縁基板 29:キャップ4.5,23
: (永久磁石) 2,3,24 : (磁性体
)11.27:(磁界強度検出手段)
1.8,10.21,22,25.2&、29 : (
支持手段)8.9.21,28,29 : (調整手段
)第2a図
第2b図Fig. 1 is a vertical cross-sectional view of a direct-acting leakage magnetic field type potentiometer of the first embodiment -0 Fig. 2a is a longitudinal cross-sectional view of a rotary leakage magnetic field type potentiometer of the second embodiment, and Fig. 2b is It is a partial view of the cross section taken along the line ■B-■B. FIG. 3 is a block diagram showing the configuration of a leakage magnetic field detection unit common to the first and second embodiments. 1: Support cylinder 2, 3: Flat magnetic plate 4.5
: Permanent magnet 6, 7: Support member 8.9: Cap 10: Reciprocating rod 11: Leakage magnetic field detection unit 12: 12: Magnetic resistance bridge 13: Differential amplification amount 14: Filter 20: Rotating shaft 21: Housing 22 nib bracket
23: Permanent magnet 24: Magnetic ring 25: Fixed member 26: Magnetic disk for improving magnetic field 27: Leakage magnetic field detection unit 28: Insulating substrate 29: Cap 4.5, 23
: (Permanent magnet) 2, 3, 24 : (Magnetic material) 11.27: (Magnetic field strength detection means) 1.8, 10.21, 22, 25.2 &, 29 : (
Supporting means) 8.9.21, 28, 29: (Adjusting means) Figure 2a Figure 2b
Claims (1)
; 前記閉磁路の漏洩磁界内に備わり、該漏洩磁界の磁界強
度を検出する磁界強度検出手段;前記閉磁路と前記磁界
強度検出手段とを相対的に移動自在に支持する支持手段
;および、前記閉磁路と前記磁界強度検出手段との相対
的な移動範囲内の、前記漏洩磁界の分布を変更する調整
手段; を備える漏洩磁界型ポテンショメータ。[Scope of Claims] A permanent magnet; A magnetic body that is magnetically connected to the permanent magnet and forms a closed magnetic path; A magnetic field intensity detection means that is provided within the leakage magnetic field of the closed magnetic path and detects the magnetic field intensity of the leakage magnetic field; Supporting means for supporting the closed magnetic path and the magnetic field strength detection means in a relatively movable manner; and changing the distribution of the leakage magnetic field within a relative movement range of the closed magnetic path and the magnetic field strength detection means. A leakage magnetic field type potentiometer comprising adjustment means;
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63046312A JPH01219611A (en) | 1988-02-29 | 1988-02-29 | Leakage magnetic field type potentiometer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP63046312A JPH01219611A (en) | 1988-02-29 | 1988-02-29 | Leakage magnetic field type potentiometer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH01219611A true JPH01219611A (en) | 1989-09-01 |
Family
ID=12743656
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP63046312A Pending JPH01219611A (en) | 1988-02-29 | 1988-02-29 | Leakage magnetic field type potentiometer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH01219611A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002062104A (en) * | 2000-05-23 | 2002-02-28 | Soc Appl Gen Electr Mec <Sagem> | Axis location sensor for rod movable in axial direction and electromagnetic actuator for valve provided with the same |
JP2016514840A (en) * | 2013-04-01 | 2016-05-23 | 江▲蘇▼多▲維▼科技有限公司Multidimension Technology Co., Ltd. | Non-contact potentiometer |
JP2016121901A (en) * | 2014-12-24 | 2016-07-07 | 栄通信工業株式会社 | Noncontact multiple-rotation potentiometer |
-
1988
- 1988-02-29 JP JP63046312A patent/JPH01219611A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002062104A (en) * | 2000-05-23 | 2002-02-28 | Soc Appl Gen Electr Mec <Sagem> | Axis location sensor for rod movable in axial direction and electromagnetic actuator for valve provided with the same |
JP4683765B2 (en) * | 2000-05-23 | 2011-05-18 | ジョンソン コントロールズ オートモーティブ エレクトロニクス | Axial position sensor for axially movable rod and electromagnetic actuator of valve provided with the same |
JP2016514840A (en) * | 2013-04-01 | 2016-05-23 | 江▲蘇▼多▲維▼科技有限公司Multidimension Technology Co., Ltd. | Non-contact potentiometer |
JP2016121901A (en) * | 2014-12-24 | 2016-07-07 | 栄通信工業株式会社 | Noncontact multiple-rotation potentiometer |
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