JPS5830557B2 - How to detect magnetic substances - Google Patents
How to detect magnetic substancesInfo
- Publication number
- JPS5830557B2 JPS5830557B2 JP54069952A JP6995279A JPS5830557B2 JP S5830557 B2 JPS5830557 B2 JP S5830557B2 JP 54069952 A JP54069952 A JP 54069952A JP 6995279 A JP6995279 A JP 6995279A JP S5830557 B2 JPS5830557 B2 JP S5830557B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- magnetic
- axis
- curve
- detection output
- 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
Links
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- Geophysics And Detection Of Objects (AREA)
Description
【発明の詳細な説明】
本発明は磁性体が定点から一定範囲内を通過したかどう
かを磁性体通過物体の大小にかかわらず正確に検出する
方法（こ関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for accurately detecting whether a magnetic body has passed within a certain range from a fixed point, regardless of the size of the object passing through the magnetic body.
地磁気中の強磁性体は磁性体自身の磁化あるいは、地磁
気によって磁化されている。A ferromagnetic substance in the earth's magnetism is magnetized by the magnetic substance itself or by the earth's magnetism.
従がって、磁性体からの磁気を検出して、当該磁性体物
体の存否を検出することができるが、磁性体の磁化の程
度がさまざまの場合には検知器の側方どの程度の距離を
通過したかを検出することは不可能であった。Therefore, it is possible to detect the presence or absence of a magnetic object by detecting the magnetism from a magnetic material, but if the degree of magnetization of the magnetic material varies, the distance to the side of the detector may vary. It was impossible to detect what had passed.
たとえば、磁界検知器がある一定のレベルで待ち受けて
いる場合、磁性体が一定の側方距離を通過しても、磁性
体が大きい場合は十分検出するが、小さい場合は検出で
きない。For example, if a magnetic field detector is waiting at a certain level, even if a magnetic object passes a certain lateral distance, it will be sufficiently detected if the magnetic object is large, but it will not be detected if it is small.
本発明はかかる点に注目し、磁性体の通過物体の大小に
かかわらず、測定位置から水平方向一定の範囲内を通過
した場合に確実に検出する磁性体の検出方法を提供する
ものである。The present invention has focused on this point, and provides a method for detecting a magnetic body that reliably detects an object passing within a certain range in the horizontal direction from a measurement position, regardless of the size of the object passing through the magnetic body.
以下本発明の実施例を具体的に説明する。Examples of the present invention will be specifically described below.
今磁気能率Ｍを持った磁性体があり、その位置を直交座
標の原点にとり、磁性体から距離ｒを離れた点Ｐの磁位
は■は（１）式となる。Now, there is a magnetic body with a magnetic efficiency M, and if its position is taken as the origin of the rectangular coordinates, the magnetic potential at a point P at a distance r from the magnetic body is expressed by equation (1).
ここで１２ ＋ ｍ 、 ｎは磁気能率Ｍのｙ軸、ｙ軸
、軸えの方向余弦である。Here, 12 + m and n are the y-axis of the magnetic efficiency M, the y-axis, and the direction cosine of the axis.
またＰ点のｙ軸、ｙ軸、Ｚ軸の磁界成分ＨｘＨｙ、Ｈｚ
、は（２）式のよう（こなる。In addition, the magnetic field components HxHy, Hz of the y-axis, y-axis, and Z-axis at point P
, is as shown in equation (2).
ここで２式を計算して、
Ｈｘ 、 Ｈｙ
、Ｈｚは（３）式
％式％
ここで説明上第１図のごとく水平のアクリル板１の下に
垂直に取付けた磁界検知子２と水平に取付けた磁界検知
子Ｘを設け、アクリル板１の上を磁性体の小磁石４をＸ
方向に平行Ｑこ置きＸ方向に移動させＸ軸上から順次ｙ
方向にづらしてＸ方向（こ移動させた場合を考える。Here, calculate Hx, Hy, and Hz using the formula (3) (% formula) For the sake of explanation, as shown in Figure 1, the magnetic field detector 2 is installed vertically under the horizontal acrylic plate 1, and the magnetic field detector 2 is installed horizontally. Install the attached magnetic field detector X, and place a small magnetic magnet 4 on the acrylic plate 1
Parallel to the direction Q
Consider the case where the object is moved in the X direction.
この場合磁気能率Ｍの方向がＸ方向を向いているので（
３）式ＯこＡ＝１ 、ｍ＝ｎ＝０と置いて、Ｚ軸の磁界
成分Ｈｚは（４）式のようになる。In this case, the direction of magnetic efficiency M is in the X direction, so (
3) Setting the formula OkoA=1 and m=n=0, the Z-axis magnetic field component Hz becomes as shown in formula (4).
となる。becomes.
第２図はＭを任意の値とし、ｙ二〇ＣＴＬ１およびｙ
＝ ３０ ｃｍ、のときの移動方向Ｘに対するＺ軸の磁
界成分Ｈｚと、Ｘの磁界成分Ｈｘの曲線であり、曲線５
はｙ ＝ Ｏｃｍ、曲線６はｙ＝−３０ｃＴＬのＸＨｚ
曲線であり、曲線７はｙ−ＯＣｒｒＬ１曲線３はｙ二３
０ＣＴｌのときのｘ−Ｈｘ曲線である。In Figure 2, M is an arbitrary value, y20CTL1 and y
= 30 cm, it is a curve of the magnetic field component Hz of the Z axis with respect to the moving direction X and the magnetic field component Hx of X, and the curve 5
is y = Ocm, curve 6 is XHz of y = -30cTL
Curve 7 is y-OCrrL1 Curve 3 is y23
This is an x-Hx curve at 0CTl.
ｙ＝Ｏｃ１′ｒＬの曲線４においてＨｚの最大値はＡ１
点であり、６５ ｍ Ｇ （ミリガウス）である。In curve 4 of y=Oc1'rL, the maximum value of Hz is A1
point, 65 mG (milligauss).
そのときのＨｘは曲線６のＡ２点であり、１２ｍＧであ
る。Hx at that time is point A2 of curve 6, which is 12 mG.
又ｙ３０ｃＩｒＬの曲線６においてＨｚの最大値は８１
点であり、３５ｍＧである。Also, the maximum value of Hz in curve 6 of y30cIrL is 81
point and is 35mG.
そのときのＨｘは曲線８のＢ２点であり２２ミリガウス
である。Hx at that time is point B2 of curve 8 and is 22 milligauss.
このようにｙ＝１０Ｃｒ／′Ｌ、 ｙ＝２０ｃｍのとき
のＨｚの最大値（Ｈｚ）ｍａｘをＨｘの値を計算し、ｙ
＝ＯＣｒ／′Ｌ１ｙ＝１０ｃｒｒＬ、 ｙ＝２０ｃｒｒ
Ｌ、 ｙ＝３０ｃｍ、のときの（Ｈｚ ）ｍａｘ／Ｈｘ
を求め、ｙ 二〇 ｃｍのときの（Ｈｚ ）ｍａｘ／Ｈ
ｚを１００％としてｙ−１０ＣｒｒＬ１ｙ＝２０Ｃｒ／
′Ｌ、ｙ＝３０７ｍの比を求めると下表の表１のように
なる。In this way, calculate the maximum value of Hz (Hz) max when y = 10Cr/'L and y = 20 cm, and calculate the value of Hx, and set y
=OCr/'L1y=10crrL, y=20crr
(Hz)max/Hx when L, y=30cm
Find (Hz)max/H when y is 20 cm
y-10CrrL1y=20Cr/, where z is 100%
The ratio of 'L, y=307m is determined as shown in Table 1 below.
表１から比の値が６９．６％以上であるときのみを選べ
ば、側方距離が２０ｃｒＩ１以内であることが判定でき
る。If only the cases where the ratio value is 69.6% or more are selected from Table 1, it can be determined that the lateral distance is within 20 crI1.
又別の磁気能力をもった小磁石の場合でも表１の（Ｈｚ
）ｍａｘ／Ｈｘの値を満足する。In addition, even in the case of a small magnet with a different magnetic ability, the (Hz
) satisfies the value of max/Hx.
従って通過する磁性体の大小に関係なく、すなわち磁気
能率の大小Ｇこ関係なく、磁界検知器からの側方距離一
定範囲内を通過した場合の検出が可能である。Therefore, regardless of the size of the passing magnetic body, that is, regardless of the magnitude of the magnetic efficiency, detection is possible when the magnetic body passes within a certain range of lateral distance from the magnetic field detector.
上記実施例では磁性体小磁石をＸ軸に平行に置きＸ軸（
こ平行に移動させて説明したが、磁性体小磁石の移動方
向がＸ軸に平行でなく、Ｘ軸ｙ軸からなる水平面と平行
に移動した場合には、（Ｂ２）ｍａｘと Ｈｘ ＋Ｈｙ
との比を求めれば実施例同様に、磁界検知器の配置さ
れたＸ軸ｙ軸の水平面の原点から、Ｘ軸ｙ軸からなる水
平面に平行な平面内の水平方向一定の距離範囲内を磁性
体が通過した場合の検出が可能である。In the above embodiment, a small magnetic magnet is placed parallel to the X axis (
Although the explanation was given by moving the small magnet parallel to this, if the moving direction of the small magnetic magnet is not parallel to the X axis but parallel to the horizontal plane consisting of the X and y axes, (B2) max and Hx + Hy
As in the example, if we calculate the ratio of It is possible to detect when a body passes through.
又小磁石磁性体がＸ軸ｙ軸２軸Ｇこ対して一定の傾きを
もっている場合には、理論的には（３）式（こ方向余弦
ｚ 、 ｍ 、 ｎの値を代入し、（Ｈｚ）ｍａｘと
Ｈｘ ＋Ｈｙ０との比を求めることにより説明づけられ
、この場合でも、磁界検知器の配置されたＸ軸ｙ軸の原
点から、Ｘ軸ｙ軸からなる水平面Ｇこ平行な平面内の、
水平方向一定距離範囲内を磁性体が通過した場合の検出
が可能である。In addition, if the magnetic material of the small magnet has a certain inclination with respect to the )max and
This can be explained by finding the ratio of Hx + Hy0, and in this case, in a plane parallel to the horizontal plane G consisting of the X and y axes from the origin of the X and y axes where the magnetic field detector is placed,
Detection is possible when a magnetic body passes within a certain distance range in the horizontal direction.
上記の実施例を実験したところ表１の値を十分満足した
値が得られた。When the above examples were tested, values that fully satisfied the values in Table 1 were obtained.
本発明は以上のように、水平面上を通過する磁性体が、
磁性体の大小にかかわらず、測定地点から水平方向一定
の範囲内を通過した場合に確実に検出する磁性体の検出
方法であり、磁界検知器を海中に沈めて、海面上一定の
範囲を通過する船を検出する等その応用範囲は広いもの
である。As described above, in the present invention, a magnetic body passing on a horizontal plane,
Regardless of the size of the magnetic object, it is a detection method that reliably detects magnetic objects when they pass within a certain range in the horizontal direction from the measurement point. Its range of applications is wide, including detecting ships that are moving.
第１図は本発明実施例の説明図であり、１はアクリル板
、２，３は磁界検知子、４は小磁石を示す。
第２図はｙ ＝ ０ （ｍ、およびｙ＝３０ｃＩｒＬの
ときの移動方向Ｘ（こ対するＺ軸の磁界成分Ｈｚと、移
動方向Ｘに対するＸの磁界成分Ｈｘの曲線であり曲線５
はｙ−ＯＣＩｒＬ１曲線６はｙ−３０ｃ／ｒｔのＸＨｚ
曲線、曲線γはｙ ＝ Ｏｃｍ、曲線８はｙ−３０７の
ときのｘ −Ｈｘ曲線である。FIG. 1 is an explanatory diagram of an embodiment of the present invention, in which 1 represents an acrylic plate, 2 and 3 represent magnetic field detectors, and 4 represents a small magnet. Figure 2 is a curve of the magnetic field component Hz of the Z axis in the moving direction X (against the moving direction X) and the magnetic field component Hx of X in the moving direction
is y-OCIrL1 curve 6 is y-30c/rt XHz
The curve γ is the x-Hx curve when y=Ocm, and the curve 8 is y-307.
Claims (1)
軸上に指向性を有する磁界検知子を配置し、水平面上を
任意の方向に移動する磁化している磁性体からの磁界を
上記配置された磁界検知子で同時に検知し、Ｚ軸の磁界
検知子の検知出力が正又は負の最大値になったときの上
記Ｚ軸の磁界検知出力値と、そのときの上記ｘ ｍ ｙ
軸上の磁界検知出力値から求められる水平面の磁界検知
出力値の絶対値との比を計算することにより、上記水平
面の原点から上記水平面上の一定距離範囲内の磁性体の
通過の有無を検出することを特徴とした磁性体の検出方
法。1. Magnetic field detectors with directivity are placed on each of the two axes of the X, Y, and 2 axes of rectangular coordinates with the Z axis perpendicular, and magnetic field detectors with directivity are placed on each of the two axes of rectangular coordinates with the Z axis perpendicular. The magnetic field is simultaneously detected by the magnetic field detector arranged above, and the Z-axis magnetic field detection output value when the detection output of the Z-axis magnetic field detector reaches the maximum positive or negative value, and the above x at that time. m y
By calculating the ratio of the absolute value of the magnetic field detection output value on the horizontal plane determined from the magnetic field detection output value on the axis, it is detected whether or not a magnetic material has passed within a certain distance range on the horizontal plane from the origin of the horizontal plane. A method for detecting magnetic substances characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54069952A JPS5830557B2 (en) | 1979-06-06 | 1979-06-06 | How to detect magnetic substances |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54069952A JPS5830557B2 (en) | 1979-06-06 | 1979-06-06 | How to detect magnetic substances |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55162078A JPS55162078A (en) | 1980-12-17 |
| JPS5830557B2 true JPS5830557B2 (en) | 1983-06-29 |
Family
ID=13417489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54069952A Expired JPS5830557B2 (en) | 1979-06-06 | 1979-06-06 | How to detect magnetic substances |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5830557B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6261285A (en) * | 1985-09-10 | 1987-03-17 | サン−ゴバン ビトラ−ジユ | Electric heating window glass for automobile |
| JPS62150658U (en) * | 1986-03-14 | 1987-09-24 | ||
| JPS6322725A (en) * | 1986-06-26 | 1988-01-30 | ピルキントン・ブラザ−ズ・ピ−エルシ− | Glass window module, end edge of which is wrapped |
| JPS6369393U (en) * | 1986-10-21 | 1988-05-10 | ||
| JPH043851Y2 (en) * | 1985-05-22 | 1992-02-05 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0274892A (en) * | 1988-09-10 | 1990-03-14 | Kyosan Electric Mfg Co Ltd | Method and apparatus for detecting overhead passage of magnetic body |
| JPH0786532B2 (en) * | 1990-03-30 | 1995-09-20 | 株式会社日立製作所 | Magnetic substance detection method |
-
1979
- 1979-06-06 JP JP54069952A patent/JPS5830557B2/en not_active Expired
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH043851Y2 (en) * | 1985-05-22 | 1992-02-05 | ||
| JPS6261285A (en) * | 1985-09-10 | 1987-03-17 | サン−ゴバン ビトラ−ジユ | Electric heating window glass for automobile |
| JPS62150658U (en) * | 1986-03-14 | 1987-09-24 | ||
| JPS6322725A (en) * | 1986-06-26 | 1988-01-30 | ピルキントン・ブラザ−ズ・ピ−エルシ− | Glass window module, end edge of which is wrapped |
| JPS6369393U (en) * | 1986-10-21 | 1988-05-10 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55162078A (en) | 1980-12-17 |
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