JPH0726649Y2 - Inclination sensor using magnetic fluid - Google Patents
Inclination sensor using magnetic fluidInfo
- Publication number
- JPH0726649Y2 JPH0726649Y2 JP1986126551U JP12655186U JPH0726649Y2 JP H0726649 Y2 JPH0726649 Y2 JP H0726649Y2 JP 1986126551 U JP1986126551 U JP 1986126551U JP 12655186 U JP12655186 U JP 12655186U JP H0726649 Y2 JPH0726649 Y2 JP H0726649Y2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic fluid
- detection
- container
- coil
- cylindrical container
- 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
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は傾斜センサに係り、特に、磁性流体を用いた簡
単な構造の傾斜センサに関する。[Detailed Description of the Invention] [Industrial application] The present invention relates to a tilt sensor, and more particularly to a tilt sensor having a simple structure using a magnetic fluid.
従来、流体として挙動する磁性体、すなわち、フェリコ
イド等の商品名で知られる磁性流体を利用した傾斜セン
サとしては、種々の方式が提案されている。その一例を
第３図に示す。この傾斜センサは、リング状の管体から
なる容器（１）内に磁性流体（図示してない）を封入し
て、その液表面が水平面を成すようにし、この容器
（１）に検出コイル（2a）、（2b）、（2c）、…を巻回
して成る。このように構成すると、容器（１）が傾くと
磁性流体の容積分布が変わり、これに伴って各検出コイ
ル（2a）、（2b）、（2c）、…の磁気抵抗が変化するの
で、この現象を利用して各検出コイルから出力する電気
信号を検出することによって容器（１）の傾斜を知るこ
とが出来る。Conventionally, various systems have been proposed as a tilt sensor using a magnetic substance that behaves as a fluid, that is, a magnetic fluid known by a trade name such as ferricoid. One example is shown in FIG. In this tilt sensor, a magnetic fluid (not shown) is enclosed in a container (1) composed of a ring-shaped tube so that the liquid surface forms a horizontal plane, and a detection coil ( 2a), (2b), (2c), ... are wound. With this configuration, when the container (1) is tilted, the volume distribution of the magnetic fluid changes, and the magnetic resistance of each of the detection coils (2a), (2b), (2c) ,. The inclination of the container (1) can be known by detecting the electric signal output from each detection coil by utilizing the phenomenon.
しかし、このような従来の検出機構においては、各検出
コイルに同一電圧を印加したときに各検出器に流れる電
流によって容器の傾きを精度良く表示する簡易な検出方
式を実現するためには、同一仕様の検出コイルを相互に
等間隔で配置しなければならず、そのためには組立や調
整上の手数を要し、組立構造は複雑化する。このよう
に、従来の磁性流体を用いた傾斜センサでは、構造を簡
単にすれば（検出コイルの仕様の同一性やその配置の正
確性を求めなければ）、検出信号処理に負担がかかり、
逆に、信号処理を簡単にしようとすれば厄介な構造とな
る（検出コイルの仕様の同一性、その配置の正確性が必
要となる）という問題があった。However, in such a conventional detection mechanism, in order to realize a simple detection method of accurately displaying the inclination of the container by the current flowing through each detector when the same voltage is applied to each detection coil, the same detection method is used. The specifications of the detection coils must be arranged at equal intervals, which requires assembly and adjustment work and complicates the assembly structure. As described above, in the conventional tilt sensor using the magnetic fluid, if the structure is simplified (the same specifications of the detection coils and the accuracy of the arrangement are not required), the detection signal processing is burdened,
On the contrary, there is a problem that if the signal processing is attempted to be simple, the structure becomes awkward (the same specifications of the detection coils and the accuracy of the arrangement are required).
その他の、この様な従来のリング状の磁性流体傾斜セン
サには、同じ傾斜量でも最大傾斜点の位置の違いによる
誤差が発生すること、また、精度を高くして大きい測定
範囲を得ようとすると、リングの半径は比較的小さく、
管の半径は大きくまとめることが必要となり、その上、
コイル径も考慮に入れると、製作上難点があり、そのた
め、測定範囲が小さく制限されること、等の問題があっ
た。In addition, in such a conventional ring-shaped magnetic fluid tilt sensor, an error occurs due to the difference in the position of the maximum tilt point even with the same tilt amount, and it is also attempted to improve accuracy and obtain a large measurement range. Then the radius of the ring is relatively small,
The radius of the pipe needs to be large, and in addition,
If the coil diameter is also taken into consideration, there is a problem in production, and therefore there are problems such as the measurement range being limited to a small range.
この考案は、このような従来技術の欠点を除き、検出信
号の処理が簡単であって、かつ、構造も簡単で、しか
も、最大傾斜点の位置の違いによっても誤差の発生がな
く、また、測定範囲の大きい磁性流体を用いた傾斜セン
サを提供することを目的としている。Except for such drawbacks of the prior art, the present invention has a simple processing of the detection signal and a simple structure, and there is no error due to the difference in the position of the maximum inclination point. It is an object of the present invention to provide a tilt sensor using a magnetic fluid having a large measurement range.
本考案の磁性流体を用いた傾斜センサは、第１図にその
基本構成を有する実施例を示すように、その内面が直線
状の円筒である容器（１）、該円筒状容器内に液表面が
水平面を保持するようにほぼ半量封入された磁性流体
（３）、該円筒状容器を巻回するように配設された複数
の検出コイル（2a,2b）を有し、該円筒状容器はその外
周が上記検出コイルを巻回するためのボビンとなり、か
つ、上記検出コイルの両側を規制する隔壁が一体に形成
されていることを特徴とする。The inclination sensor using the magnetic fluid of the present invention has a container (1) whose inner surface is a linear cylinder, and a liquid surface in the cylindrical container, as shown in the embodiment having the basic structure in FIG. Has a magnetic fluid (3) that is enclosed in a substantially half amount so as to maintain a horizontal surface, and has a plurality of detection coils (2a, 2b) arranged so as to wind the cylindrical container. The outer circumference of the detection coil serves as a bobbin around which the detection coil is wound, and partition walls that restrict both sides of the detection coil are integrally formed.
容器（１）が傾けば、磁性流体（３）の分布が変わっ
て、検出コイル（2a）、（2b）の磁性抵抗が変わる。し
たがって、検出コイル（2a）、（2b）それぞれに同一の
交流電圧を印加しておけば、流れる電流に差が生じる。
この差から、傾斜角度を知ることができる。When the container (1) is tilted, the distribution of the magnetic fluid (3) changes, and the magnetic resistance of the detection coils (2a) and (2b) changes. Therefore, if the same AC voltage is applied to each of the detection coils (2a) and (2b), a difference occurs in the flowing current.
The inclination angle can be known from this difference.
次に、第２図に示した実施例の内容を説明する。 Next, the contents of the embodiment shown in FIG. 2 will be described.
図はこの考案の傾斜センサの構成を示し、（１）はプラ
スチックやガラス製のほぼ円筒状の容器であり、その約
半分を満たすように公知技法で封入した磁性流体（３）
を内蔵し、その外周に間隔を置いて検出コイルS2及びS2
を巻回し、固定してある。S1は励磁コイルである。The figure shows the structure of the tilt sensor of the present invention. (1) is a substantially cylindrical container made of plastic or glass, and a magnetic fluid (3) enclosed by a known technique so as to fill about half of the container.
With a built-in detection coil S 2 and S 2 with an interval on the outer circumference.
Is wound and fixed. S 1 is an exciting coil.
いま、容器（１）が傾けば、磁性流体（３）の分布が変
わって検出コイルの磁気抵抗が変わるので、同一電圧を
印加したときに生じる検出コイルの電流を検出すること
によって、簡単に容器傾斜を知ることができる。Now, if the container (1) is tilted, the distribution of the magnetic fluid (3) changes and the magnetic resistance of the detection coil changes. Therefore, by simply detecting the current of the detection coil generated when the same voltage is applied, the container can be easily You can know the slope.
この際、容器（１）の形状や材質に特別な制限はなく、
内蔵流体表面が水平面を保ち得るものであれば差支えな
いが、量産性の高いプラスチック製の円筒状とすれば、
製作上有利である。さらに、これを透明体で構成する
と、内蔵磁性流体の分布状態を目視できるので実用便利
である。検出コイルの巻回方式も、その種類を問わな
い。しかも、検出信号は２つの検出コイルから得られる
ものであるので、例えそれらが同一仕様のものでなくて
も、簡単な信号処理によって精度良く傾きを検出するこ
とができる。もち論、検出コイルの個数は２個に限定さ
れないが、本考案の目的からすれば、２個にするのが望
ましい。At this time, there are no special restrictions on the shape or material of the container (1),
It does not matter as long as the surface of the built-in fluid can maintain a horizontal surface, but if it is made of a plastic cylinder with high mass productivity,
It is advantageous in production. Further, if this is made of a transparent body, the distribution state of the built-in magnetic fluid can be visually observed, which is convenient for practical use. The winding method of the detection coil does not matter. Moreover, since the detection signal is obtained from the two detection coils, even if they do not have the same specifications, the inclination can be accurately detected by simple signal processing. Of course, the number of detection coils is not limited to two, but for the purpose of the present invention, it is desirable to use two.
同一仕様の２個の検出コイルを円筒容器の軸方向中心に
対して対称に配置し、これらの検出コイルを励磁コイル
を用いて差動トランスとして用いるときは、互いにその
出力電圧を打ち消すように逆極直列に接続すると、この
傾斜センサが水平であれば、両検出コイルの別の端子間
には何ら電圧差が発生せず、また、傾斜角度とこの端子
間の電圧差との間には直線性があるので、得られた電圧
差はそのまま傾斜量を表わす信号として使用することが
できる。When two detection coils with the same specifications are arranged symmetrically with respect to the axial center of the cylindrical container and these detection coils are used as a differential transformer by using an exciting coil, they must be reversed so that their output voltages cancel each other out. When connected in pole series, if this inclination sensor is horizontal, no voltage difference will occur between the other terminals of both detection coils, and there will be a straight line between the inclination angle and the voltage difference between these terminals. Therefore, the obtained voltage difference can be directly used as a signal representing the amount of inclination.
第２図に示す実施例では上記の基本構成を満足し、さら
に構造の簡易化と検出信号の利用のし易さを図ってい
る。すなわち、容器（１）は図示の如く３つのコイル巻
回用ボビンを兼ねた一体構造のものとしてあり、特に、
これをプラスチック成形品とすれば、価格の点で有利で
あり、コイルの巻回作業も手軽である。そして、コイル
として、容器（１）の中央部のボビンに励磁コイルS1を
設け、その両側のボビンに検出コイルS2、S3を設け、両
検出コイルS2、S3を逆極直列に接続して差動トランス方
式としてある。したがって、得られる信号は精度が高
く、しかも出力特性は直線性を示す。The embodiment shown in FIG. 2 satisfies the above basic structure and further simplifies the structure and facilitates use of the detection signal. That is, the container (1) has an integral structure that also serves as three coil winding bobbins as shown in the figure.
If this is used as a plastic molded product, it is advantageous in terms of price and the coil winding work is easy. As a coil, an exciting coil S 1 is provided on a bobbin at the center of the container (1), detection coils S 2 and S 3 are provided on both sides of the bobbin, and both detection coils S 2 and S 3 are connected in reverse pole series. Connected as a differential transformer system. Therefore, the obtained signal has high accuracy, and the output characteristic shows linearity.
以上、２つの実施例について、本考案を説明したが、こ
れら実施例以外に多くの変形例が可能なことは当業者に
明らかなことであろう。Although the present invention has been described with respect to two embodiments, it will be apparent to those skilled in the art that many modifications other than these embodiments are possible.
なお、本考案の傾斜センサを２個直交させて用いること
により、いかなる方向の傾斜も容易に検出できること
は、説明を要しまい。It should be noted that it is possible to easily detect the inclination in any direction by using the two inclination sensors of the present invention so as to be orthogonal to each other.
以上の実施例説明から明らかであるが、本考案の傾斜セ
ンサは、検出精度を高くすることができるだけなく、そ
の構造が簡単で、製作、組立が容易となる利点があり、
また、検出信号は処理に手数をかけることなく利用でき
るので、製品価格を低減できるという効果を有する。さ
らに、従来のリング状のものに比較して、最大傾斜点の
移動による誤差は生じず、また、本考案のような直線円
筒状のものにおいては、測定範囲は管径と検出コイルと
の関係で決まるので、設計は自由であり、高精度を保持
して測定範囲を大きくとることができる。As is apparent from the above description of the embodiments, the inclination sensor of the present invention has the advantages that not only the detection accuracy can be improved, but also the structure is simple and the manufacture and assembly are easy.
Further, since the detection signal can be used without troublesome processing, there is an effect that the product price can be reduced. Further, compared to the conventional ring-shaped one, the error due to the movement of the maximum inclination point does not occur, and in the linear cylindrical shape like the present invention, the measurement range is the relationship between the pipe diameter and the detection coil. Since it is determined by, the design is free, and high accuracy can be maintained and a large measurement range can be secured.
その上、円筒容器を透明体で構成することによって、内
蔵磁性流体の分布状態を目視可能にすることができ、実
用上はなはだ便利である。そして、検出コイルを間隔を
置いて２個配設することにより、十分な精度で傾斜角度
を検出することができ、さらに、この２個の検出コイル
の間に励磁コイルを設けることにより、検出コイルに何
らの電圧をかけなくても信号をとり出すことができ、ま
た、これら２個の検出コイルを逆極直列に接続すること
により、精度が高く直線性の良い信号をとり出すことが
できる。そして、円筒状容器と各コイルのためのボビン
とを一体形成することにより、コイルの巻回作業が容易
で価格の安いものが可能になる。Moreover, by configuring the cylindrical container with a transparent body, the distribution state of the built-in magnetic fluid can be visually confirmed, which is extremely convenient in practical use. The inclination angle can be detected with sufficient accuracy by disposing the two detection coils at intervals, and further, by providing the exciting coil between the two detection coils, the detection coil can be detected. A signal can be taken out without applying any voltage to it, and by connecting these two detection coils in series with opposite poles, a signal with high accuracy and good linearity can be taken out. Further, by integrally forming the cylindrical container and the bobbin for each coil, it is possible to make the coil winding work easy and inexpensive.
第１図は本考案の基本構成を示す説明図、第２図は同じ
く実施例の傾斜センサの縦断面図であり、第３図は従来
例の傾斜センサの平面図である。 1:容器、2a、2b、S2、S3：検出コイル 3:磁性流体、S1：励磁コイルFIG. 1 is an explanatory view showing the basic structure of the present invention, FIG. 2 is a longitudinal sectional view of a tilt sensor of the same embodiment, and FIG. 3 is a plan view of a tilt sensor of a conventional example. 1: Vessel, 2a, 2b, S 2 , S 3 : Detection coil 3: Magnetic fluid, S 1 : Excitation coil
Claims (3)
筒状容器内に液表面が水平面を保持するようにほぼ半量
封入された磁性流体、該円筒状容器を巻回するように配
設された複数の検出コイルを有し、該円筒状容器はその
外周が上記検出コイルを巻回するためのボビンとなり、
かつ、上記検出コイルの両側を規制する隔壁が一体に形
成されていることを特徴とする磁性流体を用いた傾斜セ
ンサ1. A container having an inner surface of a linear cylinder, a magnetic fluid in which approximately half of the liquid surface is enclosed in the cylindrical container so that the liquid surface maintains a horizontal surface, and the cylindrical container is arranged so as to be wound. Having a plurality of detection coils provided, the cylindrical container is a bobbin for winding the above-mentioned detection coil,
A tilt sensor using magnetic fluid, characterized in that partition walls for restricting both sides of the detection coil are integrally formed.
該円筒状容器は透明体により構成されていることを特徴
とする磁性流体を用いた傾斜センサ2. In the claim 1 of the utility model registration claim,
Inclination sensor using magnetic fluid, characterized in that the cylindrical container is composed of a transparent body
項において、２個の該検出コイルを逆極直列に接続した
ことを特徴とする磁性流体を用いた傾斜センサ3. Claim for utility model registration claim 1 or 2
In the paragraph (2), a tilt sensor using a magnetic fluid, characterized in that the two detection coils are connected in reverse polarity in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986126551U JPH0726649Y2 (en) | 1986-08-21 | 1986-08-21 | Inclination sensor using magnetic fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986126551U JPH0726649Y2 (en) | 1986-08-21 | 1986-08-21 | Inclination sensor using magnetic fluid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6333413U JPS6333413U (en) | 1988-03-03 |
| JPH0726649Y2 true JPH0726649Y2 (en) | 1995-06-14 |
Family
ID=31020458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986126551U Expired - Lifetime JPH0726649Y2 (en) | 1986-08-21 | 1986-08-21 | Inclination sensor using magnetic fluid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0726649Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4623765B2 (en) * | 1996-02-15 | 2011-02-02 | 株式会社アミテック | 3D operation detection device |
| EP1145851A1 (en) * | 2000-04-11 | 2001-10-17 | De La Rue Giori S.A. | Method for continuously checking the production of security printing machines, application of said method and device for performing the method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6053007U (en) * | 1983-09-20 | 1985-04-13 | 株式会社 測機舎 | Tilt sensor |
-
1986
- 1986-08-21 JP JP1986126551U patent/JPH0726649Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6333413U (en) | 1988-03-03 |
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