JP2505747Y2 - Position sensor-device - Google Patents
Position sensor-deviceInfo
- Publication number
- JP2505747Y2 JP2505747Y2 JP1991028099U JP2809991U JP2505747Y2 JP 2505747 Y2 JP2505747 Y2 JP 2505747Y2 JP 1991028099 U JP1991028099 U JP 1991028099U JP 2809991 U JP2809991 U JP 2809991U JP 2505747 Y2 JP2505747 Y2 JP 2505747Y2
- Authority
- JP
- Japan
- Prior art keywords
- core
- spacer
- cover
- position sensor
- end surface
- 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.)
- Expired - Lifetime
Links
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
【0001】[0001]
【産業上の利用分野】この考案は、被検体の位置を検知
する非接触型の位置センサー装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact type position sensor device for detecting the position of a subject.
【0002】[0002]
【従来の技術】コイルを巻き付けられた一対のコアと、
この一対のコアを所定間隔をもって保持するスペーサと
を有する非接触型の位置センサーは、例えば実開平1−
142805号公報に記載されている。このような位置
センサーは、図3に示すように筒状のケース1に収納さ
れており、コイル2を巻き付けられた軟磁性体からなる
コア3の被検体側の端面3aは、ケース1の開口に固着
されたカバー4で覆われている。コア3はスペーサ5に
よって支持されており、スペーサ5がケース1に固定さ
れている。A pair of cores around which a coil is wound,
A non-contact type position sensor having a spacer that holds the pair of cores at a predetermined interval is, for example,
It is described in Japanese Patent No. 142805. Such a position sensor is housed in a cylindrical case 1 as shown in FIG. 3, and the end face 3 a on the subject side of the core 3 made of a soft magnetic material around which the coil 2 is wound has an opening in the case 1. It is covered with a cover 4 fixed to the. The core 3 is supported by the spacer 5, and the spacer 5 is fixed to the case 1.
【0003】カバー4に加わる衝撃からコアを保護する
ために、カバー4の内面とコア3の端面3aとの間には
間隙が設けられる一方、カバー4はケース1の円周部の
みで支持されていることから、カバー4の強度を確保す
べく、カバーには或る程度厚肉の部材が用いられてい
る。In order to protect the core from the impact applied to the cover 4, a gap is provided between the inner surface of the cover 4 and the end surface 3a of the core 3, while the cover 4 is supported only by the circumferential portion of the case 1. Therefore, in order to secure the strength of the cover 4, a member having a certain thickness is used for the cover.
【0004】[0004]
【考案が解決しようとする課題】従来の位置センサー
は、コアを保護する目的から、コアの端面とコアカバー
との間に間隙を設けるとともに、カバーにも厚肉の板材
が用いられているので、センサー内ギャップ、すなわち
コア端面とカバー表面との離間距離が大きくなり、セン
サ感度が低下する問題がある。一方、センサ感度を高め
るためにカバーの厚みを薄くすると、外部からの衝撃が
加わったときに軟磁性体からなるコアが破損する危険が
生ずる。従って適正なセンサーの感度を得るためには、
実質ギャップ、すなわち、コアカバー表面(センサー表
面)と被検体との離間距離を極力小さくしなければなら
ないというセンサ設置上の問題点、あるいはこの問題点
を解決するために、実質ギャップを大きくした場合に
は、センサ自体の感度を高くしなければならないという
コスト面での問題点がある。In the conventional position sensor, a gap is provided between the end surface of the core and the core cover for the purpose of protecting the core, and a thick plate material is also used for the cover. However, there is a problem in that the sensor internal gap becomes large, that is, the distance between the core end surface and the cover surface becomes large, and the sensor sensitivity decreases. On the other hand, if the thickness of the cover is reduced to increase the sensor sensitivity, there is a risk that the core made of a soft magnetic material will be damaged when an external impact is applied. Therefore, to obtain proper sensor sensitivity,
Substantial gap, that is, the sensor installation problem that the separation distance between the core cover surface (sensor surface) and the subject must be minimized, or the substantial gap is increased to solve this problem. However, there is a cost problem in that the sensitivity of the sensor itself must be increased.
【0005】[0005]
【課題を解決するための手段】この考案はコイルを巻き
付けられた一対のコアと、一対の上記コアを所定間隔を
もって保持するスペーサと、上記コア及びスペーサを収
納するケースと、このケースに設けられ上記コア及びス
ペーサの被検体側の端面を覆う薄肉のカバーとを具備す
る位置センサー装置において、上記スペーサの上記端面
を上記コアの上記端面よりも被検体側に突出させて上記
カバーの内側面に接触又は近接させたものである。The present invention is provided with a pair of cores around which a coil is wound, a spacer for holding the pair of cores at a predetermined interval, a case for accommodating the core and the spacer, and a case provided for this case. In a position sensor device comprising a thin-walled cover for covering the end surface of the core and the spacer on the subject side, the end surface of the spacer is projected to the subject side from the end surface of the core, and the inner surface of the cover is provided. They are in contact with or brought into close proximity.
【0006】[0006]
【作用】コアの被検側の端面を覆うカバーの内側面がス
ペーサの端面に接触又は近接しているので、カバーに外
圧が加わった場合、カバーに薄肉の部材が用いられてい
ても、カバーのセンサー内側方向へのたわみがスペーサ
によって防止されるのでコアを破損することなく、従っ
て実質ギャップが狭められる。Since the inner surface of the cover covering the end surface of the core on the test side is in contact with or in close proximity to the end surface of the spacer, even if a thin member is used for the cover when external pressure is applied to the cover, Deflection of the inward direction of the sensor is prevented by the spacer, so that the core is not damaged and thus the gap is substantially narrowed.
【0007】[0007]
【実施例】図1,2において、U字形のスペーサ15の
両側面にはコイル12a,12bを有する凹形のコア1
3a,13bが支持されており、スペーサ15は筒体か
らなるケース11内に収納固定されている。コア13
a,13bには、周波数特性が良く、直接巻線しても漏
電しない絶縁性の良好なNi−Znフェライトが用いら
れており、またスペーサ15には、熱膨張係数がコアと
同等であり、磁歪現象を減じるチタン酸カリウム磁器が
採用されている。ケース11の開口は、ガラス入りエポ
キシ樹脂からなるカバー14で塞がれておりセンサー内
への水や塵埃の侵入を防止している。符号16は、コイ
ル12a,12bの電流を制御回路に導く接続用リード
線を示す。1 and 2, a concave core 1 having coils 12a and 12b on both sides of a U-shaped spacer 15 is shown.
3a and 13b are supported, and the spacer 15 is housed and fixed in a case 11 made of a cylindrical body. Core 13
Ni-Zn ferrite, which has good frequency characteristics and has a good insulating property that does not leak current even when directly wound, is used for a and 13b, and the spacer 15 has a coefficient of thermal expansion equivalent to that of the core. Potassium titanate porcelain is used to reduce the magnetostriction phenomenon. The opening of the case 11 is closed by a cover 14 made of glass-filled epoxy resin to prevent water and dust from entering the sensor. Reference numeral 16 indicates a connecting lead wire for guiding the current of the coils 12a and 12b to the control circuit.
【0008】スペーサ15の被検体側端面15aは、各
コア13a,13bの被検体側端面13cよりも僅かに
突出しており、カバー14の内側面に接触あるいは近接
している。コア端面13cに対するスペーサ端面15a
の突出量は、カバー15に外圧が加わったり、センサー
が衝撃を受けたときの該カバーのセンサー内側方向への
たわみ量を考慮して、カバー14がコア端面13cに強
く当接しない程度に定められる。コア端面13cは、ス
ペーサ端面15aに隣接しているので、カバー14の肉
厚を十分小さくしてもカバー14がコア端面13cに強
く当接することはなく、たとえば、カバー14の厚さを
0.15mm程度としたときスペーサ端面15aの突出
量は0.02mm程度でよい。従ってセンサー内ギャッ
プGを十分に小さくすることができる。The subject-side end surface 15a of the spacer 15 slightly projects from the subject-side end surface 13c of each of the cores 13a and 13b, and is in contact with or close to the inner surface of the cover 14. Spacer end face 15a with respect to core end face 13c
The amount of protrusion is determined so that the cover 14 does not come into strong contact with the core end surface 13c in consideration of the amount of deflection of the cover 15 toward the inside of the sensor when external pressure is applied to the cover 15 or when the sensor receives an impact. To be Since the core end surface 13c is adjacent to the spacer end surface 15a, the cover 14 does not come into strong contact with the core end surface 13c even if the thickness of the cover 14 is sufficiently small. When the distance is about 15 mm, the protrusion amount of the spacer end surface 15a may be about 0.02 mm. Therefore, the in-sensor gap G can be made sufficiently small.
【0009】本考案における位置センサー装置は、2つ
の13a,13bが並置される方向、即ち、図1におい
て紙面方向に被検出体が移動すると、2つのコアと被検
出体による磁路のパーミアンスが互いに増減する方向に
変化するため、これをコイル12a,12bのインダク
タンス変化として取り出すものである。In the position sensor device of the present invention, when the object to be detected moves in the direction in which the two 13a and 13b are arranged side by side, that is, in the direction of the paper surface in FIG. Since they change in the increasing and decreasing directions, they are extracted as a change in the inductance of the coils 12a and 12b.
【0010】[0010]
【考案の効果】この考案によれば、コアを支持するスペ
ーサの端面をコア端面よりも突出させ、該スペーサ端面
をカバーに接触又は近接させたので、コア端面とカバー
表面との離間距離、すなわちセンサー内ギャップを小さ
くすることができ、従って、被検体に対するセンサーの
配置位置に自由度をもたせることができる。According to the present invention, since the end surface of the spacer supporting the core is projected from the end surface of the core and the end surface of the spacer is brought into contact with or close to the cover, the distance between the core end surface and the cover surface, that is, The gap in the sensor can be reduced, and therefore, the position where the sensor is arranged with respect to the subject can be made flexible.
【図1】この考案の一実施例を示す位置センサー装置の
断面図である。FIG. 1 is a sectional view of a position sensor device according to an embodiment of the present invention.
【図2】ケースから取り出された位置センサーの斜視図
である。FIG. 2 is a perspective view of a position sensor taken out from a case.
【図3】従来の位置センサー装置の一例を示す断面図で
ある。FIG. 3 is a sectional view showing an example of a conventional position sensor device.
11 ケース 12a,12b コイル 13a,13b コア 13c コア端面 14 カバー 15 スペーサ 15a スペーサ端面 11 Case 12a, 12b Coil 13a, 13b Core 13c Core end face 14 Cover 15 Spacer 15a Spacer end face
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平3−259783(JP,A) 特開 昭57−166501(JP,A) 実開 平1−142805(JP,U) 実開 昭60−146869(JP,U) 実開 平3−63815(JP,U) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-3-259783 (JP, A) JP-A-57-166501 (JP, A) Actually open 1-142805 (JP, U) Actually open-Sho 60- 146869 (JP, U) Actual Kaihei 3-63815 (JP, U)
Claims (1)
対の上記コアを所定間隔をもって保持するスペーサと、
上記コア及びスペーサを収納するケースと、このケース
に設けられ上記コア及びスペーサの被検体側の端面を覆
う薄肉のカバーとを具備する位置センサー装置におい
て、上記スペーサの上記端面を上記コアの上記端面より
も被検体側に突出させて上記カバーの内側面に接触又は
近接させたことを特徴とする位置センサー装置。1. A pair of cores around which a coil is wound, spacers for holding the pair of cores at a predetermined interval,
In a position sensor device comprising a case for accommodating the core and the spacer, and a thin cover provided on the case and covering end faces of the core and the spacer on the subject side, the end face of the spacer is the end face of the core. The position sensor device is characterized in that the position sensor device is made to project toward the subject side more than the subject and contacted or brought close to the inner surface of the cover.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1991028099U JP2505747Y2 (en) | 1991-04-23 | 1991-04-23 | Position sensor-device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1991028099U JP2505747Y2 (en) | 1991-04-23 | 1991-04-23 | Position sensor-device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04122305U JPH04122305U (en) | 1992-11-02 |
JP2505747Y2 true JP2505747Y2 (en) | 1996-07-31 |
Family
ID=31912251
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1991028099U Expired - Lifetime JP2505747Y2 (en) | 1991-04-23 | 1991-04-23 | Position sensor-device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2505747Y2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003106333A (en) * | 2001-09-28 | 2003-04-09 | Ntn Corp | Magnetic bearing device |
-
1991
- 1991-04-23 JP JP1991028099U patent/JP2505747Y2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH04122305U (en) | 1992-11-02 |
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