JPS58142203A - Magnetic body detecting device - Google Patents
Magnetic body detecting deviceInfo
- Publication number
- JPS58142203A JPS58142203A JP2564782A JP2564782A JPS58142203A JP S58142203 A JPS58142203 A JP S58142203A JP 2564782 A JP2564782 A JP 2564782A JP 2564782 A JP2564782 A JP 2564782A JP S58142203 A JPS58142203 A JP S58142203A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic field
- permanent magnet
- sensor
- magnetic body
- 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
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 81
- 238000001514 detection method Methods 0.000 claims description 14
- 239000000126 substance Substances 0.000 claims description 4
- 230000003068 static effect Effects 0.000 abstract description 4
- 238000013459 approach Methods 0.000 abstract description 2
- 239000000696 magnetic material Substances 0.000 description 5
- 239000004020 conductor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005389 magnetism Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 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 1
- 230000000694 effects Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
Abstract
Description
【発明の詳細な説明】
この発明は、ｔａ磁性体検知する装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for detecting ta magnetic material.
車等の可動体に取シ付は車運行のガイドレーン・データ
ーコード絖み取り装置などに用いられている磁性体検出
装置は、ｌ１Ｉｉ性体による地磁気のひずみを検出する
もの（以下、この装置を定磁場型検出装置と呼ぶ）、ａ
柱体に交流磁界を加えた時の誘導磁界を磁場検出用コイ
ルで検出するものが従来知られている（以下、この方式
を交流型検出装置と呼ぶ）。しかし、定磁場型検出装置
では地磁気が弱いため（約０．５０６ ）地磁気以外の
外部磁場による影響が大きく、磁性体が外部磁場の方向
に磁化され地磁気の企が本来のものと違って誤信号にな
るという欠点があった。The magnetic body detection device used in guide lane and data code deburring devices installed on movable bodies such as cars is a device that detects the distortion of the earth's magnetic field caused by l1Ii magnetic bodies (hereinafter referred to as this device). is called a constant magnetic field type detection device), a
It is conventionally known to use a magnetic field detection coil to detect the induced magnetic field when an alternating magnetic field is applied to a column (hereinafter, this method will be referred to as an alternating current detection device). However, since the earth's magnetism is weak (approximately 0.506) in constant magnetic field type detection devices, the influence of external magnetic fields other than earth's magnetism is large, and the magnetic material is magnetized in the direction of the external magnetic field, causing the earth's magnetic field to be different from the original one and causing false signals. It had the disadvantage of becoming
また、交流型装置は、強磁性体だけでなく非磁性金属（
導体）にも反応するという欠点があった。In addition, AC devices can be used with not only ferromagnetic materials but also non-magnetic metals (
It also had the disadvantage of reacting to conductors (conductors).
本発明の目的は外部磁場また導体による影響をなくした
磁性体検出装置を提供することにある。An object of the present invention is to provide a magnetic substance detection device that eliminates the effects of external magnetic fields and conductors.
本発明では電磁石あるいは永久磁石（以下これらを′１
ｉ１１石”と呼ぶ）と少なくとも１個以上のセンサーを
一体とすることで゛、磁場方向を常に−Ｗに保ち、ａｌ
性体に加わる磁場の強さを大きくしたことを特徴とする
。ここで磁石は、強い＠場を藺単に作れる永久磁石、磁
場を切ったシ入れたり、また磁場強度を変化させること
ができる電磁石を目的に応じて使用できる。ま九センサ
ーも磁性体との距離−磁場の強さ・磁化の強さに応じ、
フシックスゲート・ホール素子・磁気抵抗素子等のセン
サーを用いることができる。In the present invention, an electromagnet or a permanent magnet (hereinafter referred to as '1')
By integrating at least one sensor (referred to as "i11 stone"), the direction of the magnetic field is always maintained at -W, and the
It is characterized by increasing the strength of the magnetic field applied to the magnetic body. The magnet used here can be a permanent magnet that can easily create a strong @ field, or an electromagnet that can be used to cut off the magnetic field or change the magnetic field strength, depending on the purpose. The Makusen sensor also responds to the distance to the magnetic material, the strength of the magnetic field, and the strength of magnetization.
Sensors such as a fusix gate, a Hall element, a magnetoresistive element, etc. can be used.
以下実糟例を用いて本発明について説明する。The present invention will be explained below using actual examples.
第１回は１本発明の実施例の一つを示し、ここでは磁性
体検出装置３は永久磁石１に接して７ラツクスゲート型
磁気センサー２を設けることにょシ構成される。The first example shows one embodiment of the present invention, in which the magnetic body detection device 3 is constructed by providing a seven-lux gate type magnetic sensor 2 in contact with the permanent magnet 1.
磁気センサー２は靜磁界（Ｚ方向）がＯになる永久磁石
１の中央に設置しである。したがって周辺に磁性体がな
い場合、磁気センサー２の出力は０である。今、検出す
べき磁性体４を検出装置３に近づけると磁性体４は永久
磁石４の磁界によって磁化され永久−石１のみで現れた
はずの磁界分布が乱され磁気センサー２の位置での磁界
は０でなくなる。このため磁気センサー２に出力が生ず
る。The magnetic sensor 2 is installed at the center of the permanent magnet 1 where the static magnetic field (Z direction) is O. Therefore, when there is no magnetic substance around, the output of the magnetic sensor 2 is 0. Now, when the magnetic body 4 to be detected is brought close to the detection device 3, the magnetic body 4 is magnetized by the magnetic field of the permanent magnet 4, and the magnetic field distribution that should have appeared only in the permanent magnet 1 is disturbed, and the magnetic field at the position of the magnetic sensor 2 is becomes no longer 0. Therefore, an output is generated in the magnetic sensor 2.
磁気センサー２の出力は増幅器５によって増幅されメー
タ６に出力される。すなわち磁性体を検知できる。この
時の永久磁石の磁界は地峰気程度１１甲
の雑音磁界よりはるかに大きく無視できるので安定した
検知能力を持たせることができる。The output of the magnetic sensor 2 is amplified by an amplifier 5 and output to a meter 6. In other words, magnetic substances can be detected. At this time, the magnetic field of the permanent magnet is much larger than the noise magnetic field of level 11 and can be ignored, so stable detection ability can be provided.
第２図に２個のセンサーを使った本発明の他の実施例を
示す。FIG. 2 shows another embodiment of the invention using two sensors.
ここでは磁性体検出装置３は永久磁石ｌに微して２個の
７ラツクスゲート型磁気センサー２をその両端に設けて
構成される。差動をとるように接続し九２個の磁気セン
サー２は、永久磁石１による靜磁界（Ｚ方向）が０にな
るように（すなわち、２個のセンサーの位置での磁場が
園じ大きさでか動をとり０にできるように）磁石の中心
に対して対称な位置に置かれている。今、磁性体４と検
出装ｆＩｔ３が近づくと、磁性体４は永久磁石１によっ
て磁化され永久磁石１の磁界分布が乱される。このとき
磁性体の中心線と２個の７２ツクスゲートセンサー２の
中心線が一致した場合、磁性体の磁化分布は中心に対し
て対称なので第３図に示すように２個のセンサーには同
じ大きさの信号ＪＥ現われ差動を取った出力は０になる
。ところが、センサーの対称がずれると２個のフラック
スゲートセンサーの位置での磁場の大きさに違いがでて
伽匂が増幅器５を通シメータ６に出力される。Here, the magnetic body detection device 3 is constructed by installing two 7-lux gate type magnetic sensors 2 on both ends of a permanent magnet l. The 92 magnetic sensors 2 are connected in a differential manner so that the static magnetic field (Z direction) caused by the permanent magnet 1 becomes 0 (that is, the magnetic field at the position of the two sensors is the same size). It is placed in a symmetrical position with respect to the center of the magnet so that the large movement can be reduced to zero. Now, when the magnetic body 4 and the detection device fIt3 approach, the magnetic body 4 is magnetized by the permanent magnet 1, and the magnetic field distribution of the permanent magnet 1 is disturbed. At this time, if the center line of the magnetic body and the center line of the two 72x gate sensors 2 coincide, the magnetization distribution of the magnetic body is symmetrical about the center, so the two sensors have the same distribution as shown in Figure 3. The magnitude signal JE appears and the differential output becomes 0. However, if the symmetry of the sensors is shifted, the magnitude of the magnetic fields at the positions of the two flux gate sensors will differ, and a melody will be outputted to the simeter 6 through the amplifier 5.
すなわち第３図は、第４図の如く回転楕円体の最大径の
面内（水平方向）に靜磁界をかけた時の回転軸方向（＠
直方向）の磁場成分を表わしている。In other words, Figure 3 shows the rotational axis direction (@
represents the magnetic field component in the perpendicular direction).
１１．１２．１３はそれぞれ円の端１円の中心と端の中
間、円の中心を通る一線上の磁場分布を表わしている。11, 12, and 13 represent the magnetic field distribution on a line passing through the center of the circle, the center of the circle, and the center of the circle, respectively.
特性１１〜１３とも磁性体の端付近で２つの極大をもっ
ている（極性は逆である）。Characteristics 11 to 13 all have two maxima near the ends of the magnetic material (the polarities are opposite).
このように磁石と２個のセンサーを組合せることにより
ａｉ磁性体知装置と磁性体の位置のずれに対して敏感で
かつ安定な能力を持九せることかできる。尚、上の例で
は２個の７ラツクスケートセンサーはＺ方向磁界を検出
するように置いたが。By combining a magnet and two sensors in this way, it is possible to have a sensitive and stable ability to the positional deviation of the AI magnetic body sensing device and the magnetic body. In the above example, the two 7 rack skate sensors were placed to detect the Z-direction magnetic field.
これはＺ方向だけに限らずどの方向の磁場をとるように
置いてもよい。ま九、上の２つの例ではフラックスゲー
トセンサーを用いたが、他の磁気センサー（ホール素子
、磁気抵抗素子等）を用いてもよい。また、永久磁石の
代プに１ｌｆｆｉ石を使い１、データコードに異なった
形状（反ａ場係数）をもった材料を使えは、１１Ｅ磁石
の電流を変えることによって異なる情報を得ることがで
きるようになる。This is not limited to the Z direction, but may be placed so as to have a magnetic field in any direction. (9) Although a fluxgate sensor was used in the above two examples, other magnetic sensors (Hall element, magnetoresistive element, etc.) may be used. In addition, if a 1lffi stone is used as a permanent magnet, and a material with a different shape (reaction field coefficient) is used for the data code, different information can be obtained by changing the current of the 11E magnet. become.
以上のように磁石とセンサーを組合せることによって外
部雑音磁場の影譬を少なくすることができ、非常に安定
な磁性体検出装置を作ることができる。By combining a magnet and a sensor as described above, it is possible to reduce the influence of external noise magnetic fields, and it is possible to create an extremely stable magnetic body detection device.
第１図および第２図は本発明の実施例を示す図である。
１図は、１個のフラックスゲートセンサと２図は２個の
フラックスゲートセンサーと、１個の永久磁石との組合
せを示している。
第３図は、回転楕円体の最大径の面内に靜磁界（水平方
向）が加わった時の回軸軸方向（垂山方向）の磁場成分
（Ｈｚ）を表わしている。第４図は靜磁界の印加を示す
図である。
１・・・・・・永久磁石、２・・・・・・フラックスゲ
ートセンサー、３・・・・・・磁性体検出装置、４・・
・・・・磁性体、５′・・・・・・増幅器、６・・・・
・・メーター。FIGS. 1 and 2 are diagrams showing embodiments of the present invention. Figure 1 shows a combination of one fluxgate sensor, and Figure 2 shows a combination of two fluxgate sensors and one permanent magnet. FIG. 3 shows the magnetic field component (Hz) in the rotational axis direction (in the Taruyama direction) when a static magnetic field (in the horizontal direction) is applied within the plane of the maximum diameter of the spheroid. FIG. 4 is a diagram showing the application of a quiet magnetic field. 1...Permanent magnet, 2...Fluxgate sensor, 3...Magnetic body detection device, 4...
...Magnetic material, 5'...Amplifier, 6...
··meter.
Claims (1)
磁気センサーを設けたことを特徴とする磁性体検出装置
。A magnetic substance detection device characterized in that at least one magnetic sensor is provided adjacent to a magnet for generating a magnetic field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2564782A JPS58142203A (en) | 1982-02-19 | 1982-02-19 | Magnetic body detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2564782A JPS58142203A (en) | 1982-02-19 | 1982-02-19 | Magnetic body detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58142203A true JPS58142203A (en) | 1983-08-24 |
Family
ID=12171615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2564782A Pending JPS58142203A (en) | 1982-02-19 | 1982-02-19 | Magnetic body detecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58142203A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105319518A (en) * | 2014-08-01 | 2016-02-10 | 迈克纳斯公司 | Magnetic field measuring device |
| CN106249180A (en) * | 2015-06-09 | 2016-12-21 | 迈克纳斯公司 | Magnetic-field-measuring device |
| WO2023002666A1 (en) * | 2021-07-21 | 2023-01-26 | アルプスアルパイン株式会社 | Tire wear sensor, tire degree-of-wear measurement system, tire degree-of-wear assessment device, and tire degree-of-wear assessment method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5655801A (en) * | 1979-10-15 | 1981-05-16 | Furukawa Electric Co Ltd:The | Method and device for detecting joint of steel wire core of aluminum cable |
-
1982
- 1982-02-19 JP JP2564782A patent/JPS58142203A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5655801A (en) * | 1979-10-15 | 1981-05-16 | Furukawa Electric Co Ltd:The | Method and device for detecting joint of steel wire core of aluminum cable |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105319518A (en) * | 2014-08-01 | 2016-02-10 | 迈克纳斯公司 | Magnetic field measuring device |
| JP2016035456A (en) * | 2014-08-01 | 2016-03-17 | マイクロナス ゲー・エム・ベー・ハー | Magnetic field measuring device |
| US9645203B2 (en) | 2014-08-01 | 2017-05-09 | Micronas Gmbh | Magnetic field measuring device |
| CN106249180A (en) * | 2015-06-09 | 2016-12-21 | 迈克纳斯公司 | Magnetic-field-measuring device |
| CN106249180B (en) * | 2015-06-09 | 2019-11-01 | Tdk-迈克纳斯有限责任公司 | Magnetic-field-measuring device |
| WO2023002666A1 (en) * | 2021-07-21 | 2023-01-26 | アルプスアルパイン株式会社 | Tire wear sensor, tire degree-of-wear measurement system, tire degree-of-wear assessment device, and tire degree-of-wear assessment method |
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