JPS63205586A - Magnetic liquid material for measuring magnetic field distribution - Google Patents
Magnetic liquid material for measuring magnetic field distributionInfo
- Publication number
- JPS63205586A JPS63205586A JP62038200A JP3820087A JPS63205586A JP S63205586 A JPS63205586 A JP S63205586A JP 62038200 A JP62038200 A JP 62038200A JP 3820087 A JP3820087 A JP 3820087A JP S63205586 A JPS63205586 A JP S63205586A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- magnetic
- space
- fluid
- field distribution
- 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 48
- 239000011344 liquid material Substances 0.000 title abstract 3
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 6
- 239000002904 solvent Substances 0.000 claims abstract description 6
- 239000004094 surface-active agent Substances 0.000 claims abstract description 4
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 4
- 239000003302 ferromagnetic material Substances 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims abstract description 3
- 239000011553 magnetic fluid Substances 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 10
- 230000001112 coagulating effect Effects 0.000 claims description 2
- 239000010419 fine particle Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 230000005294 ferromagnetic effect Effects 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 2
- 239000007787 solid Substances 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 4
- 230000005415 magnetization Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000006247 magnetic powder Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はスリット部等の狭い空間における磁場分布の測
定に用いる磁性流体材料に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic fluid material used for measuring magnetic field distribution in a narrow space such as a slit.
従来、磁場の測定には各種磁気センサが使用されており
、センサを磁場空間中で移動させ、各点での磁場強度及
び方向を測定することにより磁場分布を求めている。又
、磁場の様子を目視するためには磁性粉を散布し、その
パターンを見る方法が主として用いられている。Conventionally, various magnetic sensors have been used to measure magnetic fields, and the magnetic field distribution is determined by moving the sensor in a magnetic field space and measuring the magnetic field strength and direction at each point. Furthermore, in order to visually observe the state of the magnetic field, a method is mainly used in which magnetic powder is scattered and the pattern is observed.
しかしながら磁場分布の測定に際し、センサを空間的に
移動させる方法によるときには多数の点での測定が必要
であり、逆にスリットのような狭い空間に対してはセン
サの挿入ができないため、磁場分布の測定ができないと
いう欠点がある。また磁性粉を散布する方法によるとき
でも直接口で見ることのできない領域に対してはもとよ
りその゛磁場分布も見ることができないという欠点があ
る。However, when measuring the magnetic field distribution, it is necessary to measure at many points when the sensor is moved spatially, and conversely, the sensor cannot be inserted into a narrow space such as a slit. The disadvantage is that it cannot be measured. Furthermore, even when using the method of dispersing magnetic powder, there is a drawback that not only the area that cannot be seen directly with the mouth but also the magnetic field distribution cannot be seen.
本発明の目的はスリット中のような狭い空間に形成され
る磁場分布の様子を目視できるような材料を供給するこ
とにある。An object of the present invention is to provide a material that allows visual observation of the magnetic field distribution formed in a narrow space such as a slit.
本発明は表面に界面活性剤を吸着させたフェライト、金
属強磁性体などの微粒子を溶媒中に安定に分散させてな
る磁性流体に前記溶媒を凝固せしめる硬化剤を添加した
ことを特徴とする磁場分布測定用磁性流体材料である。The present invention provides a magnetic field characterized in that a hardening agent for coagulating the solvent is added to a magnetic fluid made by stably dispersing fine particles of ferrite, metal ferromagnetic material, etc. on the surface of which a surfactant is adsorbed in a solvent. This is a magnetic fluid material for distribution measurement.
磁性流体は磁場により流動性を有する流体で、磁場中に
おいて流体に発生する磁気体積力により磁場分布に従っ
て流体界面が変形する。その時に・１生じる力は。A magnetic fluid is a fluid that has fluidity due to a magnetic field, and the fluid interface is deformed according to the magnetic field distribution due to the magnetic body force generated in the fluid in the magnetic field. At that time, the force that arises is 1.
ｆ＋ａ＝−ＭＶＨ
で与えられる。ここでｆｌｌは磁気体積力１Ｍは流体の
持つ磁化、Ｈは磁場勾配である。それゆえ磁場分布によ
り生じる磁場勾配Ｈと流体の持つ磁化Ｍとの積で与えら
れる力により、流体表面にはスパイク状のパターンが発
生する。それゆえこのパターンを保持したまま流体を凝
固させその凝固物を取り出し得られたパターンを見るこ
とにより磁場の分布状態を観察することができる。第２
図は流体の界面の変形の様子を模式的に示したものであ
る。（ａ）に示すように容器６内に収容された磁性流体
５の表面には、磁場が作用しないときには平坦であるが
、（ｂ）のように磁場が作用したときには流体５の表面
に磁力線７の方向に突起が形成され、スパイク状パター
ン８が発生する。このパターン８を凝固させれば、パタ
ーンの形状から磁場の分布状態を判断できる。It is given by f+a=-MVH. Here, fll is the magnetic body force 1M is the magnetization of the fluid, and H is the magnetic field gradient. Therefore, a spike-like pattern is generated on the fluid surface due to the force given by the product of the magnetic field gradient H caused by the magnetic field distribution and the magnetization M of the fluid. Therefore, the distribution state of the magnetic field can be observed by solidifying the fluid while maintaining this pattern, taking out the solidified material, and looking at the resulting pattern. Second
The figure schematically shows the deformation of the fluid interface. As shown in (a), the surface of the magnetic fluid 5 housed in the container 6 is flat when no magnetic field acts on it, but when a magnetic field acts on the surface of the fluid 5 as shown in (b), magnetic lines of force 7 appear on the surface of the fluid 5. A protrusion is formed in the direction of , and a spike-like pattern 8 is generated. If this pattern 8 is solidified, the distribution state of the magnetic field can be determined from the shape of the pattern.
次に第１図を用いて本発明の詳細な説明する。 Next, the present invention will be explained in detail using FIG.
（ａ）に示すような狭いスリット状の磁場空間１に、そ
の間口３を通して磁性流体に硬化剤を含む本発明の磁性
流体材料２を注入した。硬化時間は流体が磁場空間１に
一様に分布する時間を考慮して調整した。磁場空間１に
注入された磁性流体２は、（ｂ）に示すように磁場の分
布に従ってその界面が変形し、表面にスパイク状のパタ
ーン８が形成される。硬化時間の後にこの空間より磁性
流体材料２の凝固物を取り出し、その表面のパターン８
を観察することにより該空間の磁場分布を目視すること
ができる。なお、本実施例ではあらかじめスリット壁に
雛形剤を塗布して流体材料の凝固物の取り出しを容易に
した。また本発明の磁性流体材料を用いて高周波の定常
磁場の分布を見ることも可能である。さらに一様な直流
磁場中に適用して先の磁性流体の磁化Ｍを大きくするこ
とにより微小な磁場勾配を見ることも可能である。A magnetic fluid material 2 of the present invention containing a hardening agent in the magnetic fluid was injected into a narrow slit-shaped magnetic field space 1 as shown in (a) through the opening 3 thereof. The curing time was adjusted in consideration of the time required for the fluid to be uniformly distributed in the magnetic field space 1. The interface of the magnetic fluid 2 injected into the magnetic field space 1 is deformed according to the distribution of the magnetic field, as shown in (b), and a spike-like pattern 8 is formed on the surface. After the curing time, the solidified magnetic fluid material 2 is taken out from this space and the pattern 8 on its surface is formed.
By observing , the magnetic field distribution in the space can be visually observed. In this example, a template agent was applied to the slit wall in advance to facilitate the removal of the solidified fluid material. It is also possible to observe the distribution of a high-frequency steady magnetic field using the magnetic fluid material of the present invention. Furthermore, it is also possible to observe minute magnetic field gradients by increasing the magnetization M of the magnetic fluid by applying it to a uniform DC magnetic field.
以上のように本発明によれば磁性流体の磁場による変形
を利用し、流体を硬化させ、その変形状態を保持させる
ため特に目視不可能な空間の磁場分布を目視できる効果
を有するものである。As described above, according to the present invention, the deformation of the magnetic fluid due to the magnetic field is used to harden the fluid and maintain the deformed state, so that the magnetic field distribution in a space that cannot be visually seen can be visually observed.
第１図（ａ）〜（ｃ）は本発明材料を用いて磁場分布を
測定する要領を工程順に示す断面図、第２図は原理作用
を示すルので（ａ）は磁場分布がないとき、（ｂ）は磁
場分布があるときの磁性流体の界面の形状変化を示す図
である。
１・・・磁場空間 ２，５・・・磁性流体３
・・・開口 ４・・・硬化した磁性流体
６・・・容器 ７・・・磁力線８・・・
パターンFigures 1 (a) to (c) are cross-sectional views showing the procedure for measuring magnetic field distribution using the material of the present invention in order of process, and Figure 2 shows the principle of operation. (b) is a diagram showing changes in the shape of the magnetic fluid interface when there is a magnetic field distribution. 1... Magnetic field space 2, 5... Magnetic fluid 3
...Opening 4...Hardened magnetic fluid 6...Container 7...Magnetic field lines 8...
pattern
Claims (1)
強磁性体などの微粒子を溶媒中に安定に分散させてなる
磁性流体に前記溶媒を凝固せしめる硬化剤を添加したこ
とを特徴とする磁場分布測定用磁性流体材料。(1) A magnetic field characterized in that a hardening agent for coagulating the solvent is added to a magnetic fluid made by stably dispersing fine particles of ferrite, metal ferromagnetic material, etc. on the surface of which a surfactant is adsorbed in a solvent. Magnetic fluid material for distribution measurement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62038200A JPS63205586A (en) | 1987-02-20 | 1987-02-20 | Magnetic liquid material for measuring magnetic field distribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62038200A JPS63205586A (en) | 1987-02-20 | 1987-02-20 | Magnetic liquid material for measuring magnetic field distribution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63205586A true JPS63205586A (en) | 1988-08-25 |
Family
ID=12518704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62038200A Pending JPS63205586A (en) | 1987-02-20 | 1987-02-20 | Magnetic liquid material for measuring magnetic field distribution |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63205586A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7196520B2 (en) * | 2004-10-22 | 2007-03-27 | General Electric Company | Method and apparatus for passive shimming of magnets |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59164654U (en) * | 1983-04-18 | 1984-11-05 | 株式会社 ジユリア・オ−ジエ | jumping exercise equipment |
| JPS59200670A (en) * | 1983-04-26 | 1984-11-14 | 株式会社前田商事 | Trampolin |
-
1987
- 1987-02-20 JP JP62038200A patent/JPS63205586A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59164654U (en) * | 1983-04-18 | 1984-11-05 | 株式会社 ジユリア・オ−ジエ | jumping exercise equipment |
| JPS59200670A (en) * | 1983-04-26 | 1984-11-14 | 株式会社前田商事 | Trampolin |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7196520B2 (en) * | 2004-10-22 | 2007-03-27 | General Electric Company | Method and apparatus for passive shimming of magnets |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Hartmann | Magnetic force microscopy | |
| DE102007025000B3 (en) | Magnetic field sensor for monitoring wheel movement in anti-skid system of automobiles, has magnetic field sensor arrangement and magnet body | |
| EP1304542A3 (en) | Method for Determining the spacial distribution of magnetic particles | |
| US5195524A (en) | Flow imaging method by means of an MRI apparatus and apparatus for realizing same | |
| JPS63205586A (en) | Magnetic liquid material for measuring magnetic field distribution | |
| Ahrend et al. | Stray fields above artificial magnetic in-plane domains | |
| US8316726B2 (en) | Biaxial stress management | |
| Binks et al. | Effect of depth on the pattern formation of Faraday waves | |
| JPH0335182A (en) | Instrument for measuring superconducting magnetic field | |
| Möddel et al. | Estimating orientation using multi-contrast MPI | |
| Coïsson et al. | Development and calibration of a MFM-based system for local hysteresis loops measurements | |
| Allen et al. | The ferromagnetic domain wall as a GMR trilayer | |
| JPS63305963A (en) | Method and device for applying dispersion onto flexible supporter material in non-structure manner | |
| JPH03180756A (en) | Method for measuring electric resistance of magnetoresistive element on wafer | |
| DE102007049741A1 (en) | Magnetic measuring rod carrier, has set of magnetizable sections for alternating in measuring direction, where adjacent magnetizable sections exhibit different magnetic polarities in measuring direction | |
| EP4325233A1 (en) | Method for producing a magnetic field sensor chip having an integrated back bias magnet | |
| Bukharaev et al. | Magnetic force microscopy of magnetization reversal of microstructures in situ in the external field of up to 2000Oe | |
| JPH0345600Y2 (en) | ||
| Middleton | The nucleation and reversal of magnetisation in high fields to form cylindrical domains in thin magnetic films | |
| JPS62224446A (en) | Production of reversal pattern for forming casting mold | |
| JPH01239454A (en) | Determination of metal nickel in nickel compound | |
| JPH0373824A (en) | Measurement of particle size of magnetic powder | |
| SU819705A1 (en) | Method of producing acoustic contact in ultrasonic measurements | |
| JPS5826767Y2 (en) | 3D curved surface modeling device | |
| DE102013011160A1 (en) | Arrangement and method for determining the concentration of a paramagnetic gas |