JPH0815227A - Magnetizing device for steel plate - Google Patents
Magnetizing device for steel plateInfo
- Publication number
- JPH0815227A JPH0815227A JP14616894A JP14616894A JPH0815227A JP H0815227 A JPH0815227 A JP H0815227A JP 14616894 A JP14616894 A JP 14616894A JP 14616894 A JP14616894 A JP 14616894A JP H0815227 A JPH0815227 A JP H0815227A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetizing
- steel plate
- magnetic poles
- steel sheet
- 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
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Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鋼板の欠陥を検出する
ための漏洩磁束探傷法に使用する磁化装置に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetizing device used in a leakage magnetic flux flaw detection method for detecting defects in a steel sheet.
【０００２】[0002]
【従来の技術】自動車のボディ等に使用されている鋼板
のように毎秒数メートルもの速度で連続生産される鋼板
の欠陥を検出する方法として漏洩磁束探傷法がある。こ
の方法は、鋼板を磁気的に飽和するまで磁化し、欠陥の
存在によって漏洩する漏洩磁束を磁気センサーによって
検出するものである。2. Description of the Related Art There is a leakage magnetic flux flaw detection method as a method for detecting defects in a steel sheet continuously produced at a speed of several meters per second such as a steel sheet used for an automobile body. In this method, a steel sheet is magnetized until it is magnetically saturated, and a magnetic flux leaking due to the presence of defects is detected by a magnetic sensor.
【０００３】ところで、従来の漏洩磁束探傷法に使用さ
れていた磁化装置は、図５に示すように、磁化コイル１
を巻回してある２つの磁極２を同一線上に対立させて設
置し、この２つの磁極２をそれぞれＮ極とＳ極に帯磁さ
せ、これら２つの磁極２の下端部を継鉄３によって接続
して鋼板４の幅方向に磁界を与えるべく構成されたもの
が一般的である。By the way, as shown in FIG. 5, the magnetizing device used in the conventional leakage magnetic flux flaw detection method has a magnetizing coil 1 as shown in FIG.
The two magnetic poles 2 wound around are installed opposite to each other on the same line, the two magnetic poles 2 are magnetized to the N pole and the S pole, respectively, and the lower ends of these two magnetic poles 2 are connected by the yoke 3. It is generally configured to apply a magnetic field in the width direction of the steel plate 4.
【０００４】このような磁化装置では、磁化コイル１を
巻回してある２つの磁極２と継鉄３と鋼板４とで磁気的
な閉回路を形成することになる。ただし、この場合磁極
２と鋼板４との間にはある程度の距離を保つ必要から磁
気抵抗が大きくなり、磁極２から鋼板４へ、あるいはそ
の反対方向へ流れる磁力線分布は、図６に示すように、
磁極２付近で広がりを持つことになって、図７に示すよ
うに、磁化方向に沿って磁場が垂直成分、あるいは水平
成分を持つことになる（以下、この磁場を「浮遊磁場」
という）。In such a magnetizing device, a magnetic closed circuit is formed by the two magnetic poles 2 around which the magnetizing coil 1 is wound, the yoke 3 and the steel plate 4. However, in this case, since it is necessary to maintain a certain distance between the magnetic pole 2 and the steel plate 4, the magnetic resistance becomes large, and the magnetic force line distribution flowing from the magnetic pole 2 to the steel plate 4 or in the opposite direction is as shown in FIG. ,
Since the magnetic field has a spread near the magnetic pole 2, as shown in FIG. 7, the magnetic field has a vertical component or a horizontal component along the magnetization direction (hereinafter, this magnetic field is referred to as a “stray magnetic field”).
That).
【０００５】漏洩磁束探傷においては、磁気センサーは
一般に欠陥漏洩磁場の垂直成分あるいは水平成分を検出
するが、磁気センサーには各々検出特性があり、検出可
能な磁場範囲が例えば±１００（Gauss ）といった限界
があるので、例えば図７の場合では磁場付近での検出可
能な磁場範囲（０〜１００Gauss ）を超えるような浮遊
磁場が発生している状態では漏洩磁場の検出が不可能に
なる。In the leakage magnetic flux flaw detection, a magnetic sensor generally detects a vertical component or a horizontal component of a defect leakage magnetic field, but each magnetic sensor has a detection characteristic and the detectable magnetic field range is, for example, ± 100 (Gauss). Since there is a limit, for example, in the case of FIG. 7, it is impossible to detect a leakage magnetic field when a stray magnetic field exceeding the detectable magnetic field range (0 to 100 Gauss) near the magnetic field is generated.
【０００６】そこで、特開昭５０−１３８３９９号公報
で、検査対象となる鋼板４の一面に転接するローラ５
に、これの軸心上の継鉄３によって接続された一対の磁
極２を組み込み、これら磁極２がローラ５を構成する薄
肉円筒の非磁性体６を介して鋼板４に接触するように構
成し、鋼板４を一部に含む磁気的な閉回路を形成するこ
とによって鋼板４を磁化する装置が開示されている（図
８参照）。Therefore, in Japanese Patent Laid-Open No. 50-138399, a roller 5 rolling on one surface of a steel plate 4 to be inspected is used.
A pair of magnetic poles 2 connected to each other by a yoke 3 on its axis, and these magnetic poles 2 contact the steel plate 4 via a thin-walled cylindrical non-magnetic body 6 constituting a roller 5. An apparatus for magnetizing the steel plate 4 by forming a magnetic closed circuit including the steel plate 4 in part is disclosed (see FIG. 8).
【０００７】しかしながら、特開昭５０−１３８３９９
号公報で開示された磁化装置では、鋼板に発生した欠陥
に基づく漏洩磁場以外の不要な浮遊磁場を抑制すること
が不可能であるので、浮遊磁場が探傷信号に悪影響を及
ぼしたり、磁気センサーの検出特性が飽和してしまって
欠陥信号が得られなくなるという問題がある。However, JP-A-50-138399
In the magnetizing device disclosed in the publication, it is impossible to suppress unnecessary stray magnetic fields other than the stray magnetic field due to defects that occur in the steel plate, so the stray magnetic field adversely affects the flaw detection signal, and There is a problem that the detection characteristic is saturated and a defect signal cannot be obtained.
【０００８】この特開昭５０−１３８３９９号公報で開
示された磁化装置の欠点を解決し、鋼板を磁気飽和させ
た状態で不要の浮遊磁場を抑制できる装置が、例えば１
９９０年発行の「製鉄研究第３３９号」第５７〜６２頁
に示されている。図９はこの装置を模式的に示す正面図
であり、図５に示した装置と同様の磁化装置の磁極２の
先端の上方に適宜の間隔を存して浮遊磁場抑制用磁化装
置の磁極２の下端を対向するように設置したものであ
る。なお、図９において図５と同一部分には同一の符号
を付している。A device that solves the drawbacks of the magnetizing device disclosed in Japanese Patent Laid-Open No. 50-138399 and can suppress an unnecessary stray magnetic field in a state where the steel sheet is magnetically saturated is, for example, 1
It is shown on pages 57 to 62 of "Iron Making Research No. 339" issued in 990. FIG. 9 is a front view schematically showing this device, and the magnetic pole 2 of the stray magnetic field suppressing magnetizing device is spaced above the tip of the magnetic pole 2 of the magnetizing device similar to the device shown in FIG. It is installed such that the lower ends of the are opposed to each other. In FIG. 9, the same parts as those in FIG. 5 are designated by the same reference numerals.
【０００９】すなわち、この図９に示す装置では、磁化
装置と同等の磁化力を有する浮遊磁場抑制用磁化装置を
上下方向に対向するように設置することで鋼板４を磁気
的に飽和させ、また磁気装置からの浮遊磁場を浮遊磁場
抑制用磁化装置によって相殺させることにより、不要な
浮遊磁場を抑制するようにしている。That is, in the apparatus shown in FIG. 9, a stray magnetic field suppressing magnetizing device having a magnetizing force equivalent to that of the magnetizing device is installed so as to face each other in the vertical direction to magnetically saturate the steel plate 4, and The stray magnetic field from the magnetic device is canceled by the stray magnetic field suppressing magnetizing device to suppress an unnecessary stray magnetic field.
【００１０】[0010]
【発明が解決しようとする課題】しかしながら、図９に
示すような、磁化装置と同等の磁化力を有する浮遊磁場
抑制用磁化装置を上下方向に対向するように設置したも
のでは、２つの磁化器が必要となるので、設備費が高く
なるとともに、鋼板の上方に浮遊磁場抑制用磁化装置を
設置するための広い空間が必要となる。However, in the case where the stray magnetic field suppressing magnetizing device having the same magnetizing force as that of the magnetizing device as shown in FIG. 9 is installed so as to face each other in the vertical direction, two magnetizers are used. Therefore, the equipment cost becomes high, and a large space for installing the stray magnetic field suppressing magnetizing device is required above the steel plate.
【００１１】本発明は、上記した従来の問題点に鑑みて
なされたものであり、別段の浮遊磁場抑制用磁化装置を
必要とすることなく不要な浮遊磁場を抑制でき、しかも
鋼板を幅方向において均一に磁気飽和できる鋼板の磁化
装置を提供することを目的としている。The present invention has been made in view of the above-mentioned conventional problems, and it is possible to suppress an unnecessary stray magnetic field without the need for a separate stray magnetic field suppressing magnetizing device, and moreover, in the width direction of the steel sheet. It is an object of the present invention to provide a magnetizing device for a steel sheet that can be uniformly magnetically saturated.
【００１２】[0012]
【課題を解決するための手段】上記した目的を達成する
ために、本発明の鋼板の磁化装置は、それぞれ所定の間
隔を存して鋼板の幅方向に起立配置した２つの磁極と、
これらの磁極を接続する継鉄と、前記２つの磁極をＮ極
とＳ極に帯磁させて鋼板を幅方向に磁化する磁化コイル
と、前記２つの磁極間で鋼板に近接して配置される強磁
性板を備えさせているのである。In order to achieve the above-mentioned object, a magnetizing device for a steel sheet according to the present invention comprises two magnetic poles standing upright in the width direction of the steel sheet with a predetermined space therebetween.
A yoke that connects these magnetic poles, a magnetizing coil that magnetizes the two magnetic poles to N and S poles to magnetize the steel sheet in the width direction, and a strong coil that is arranged between the two magnetic poles and is close to the steel sheet. It is equipped with a magnetic plate.
【００１３】[0013]
【作用】本発明の鋼板の磁化装置は、それぞれ所定の間
隔を存して鋼板の幅方向に起立配置した２つの磁極と、
これらの磁極を接続する継鉄と、前記２つの磁極をＮ極
とＳ極に帯磁させて鋼板を幅方向に磁化する磁化コイル
と、前記２つの磁極間で鋼板に近接して配置される強磁
性板を備えさせているので、２つの磁極と継鉄及び鋼
板を一部に含む磁気的な回路と、２つの磁極と継鉄及
び強磁性板を一部に含む磁気的な回路、の２つの磁気的
な回路が形成されることになり、一方の磁極から広がり
をもって鋼板に流れていた浮遊磁場は、の強磁性板を
一部に含む磁気的な回路を通過して他方の磁極へ流れて
ゆき、鋼板上の空間に発生する不要な浮遊磁場を抑制で
きる。The magnetizing device for a steel sheet according to the present invention comprises two magnetic poles standing upright in the width direction of the steel sheet with a predetermined space between them.
A yoke that connects these magnetic poles, a magnetizing coil that magnetizes the two magnetic poles to N and S poles to magnetize the steel sheet in the width direction, and a strong coil that is arranged between the two magnetic poles and is close to the steel sheet. The magnetic circuit includes two magnetic poles, a yoke and a steel plate, and a magnetic circuit including two magnetic poles, a yoke and a ferromagnetic plate. Two magnetic circuits will be formed, and the stray magnetic field that was flowing from one magnetic pole to the steel plate with a spread will flow to the other magnetic pole through the magnetic circuit that partially contains the ferromagnetic plate. Therefore, unnecessary stray magnetic field generated in the space above the steel plate can be suppressed.
【００１４】[0014]
【実施例】以下、本発明の鋼板の磁化装置を、図１及び
図２に示す１実施例に基づいて説明する。図１は本発明
鋼板の磁化装置の概略構成を示す正面図、図２は本発明
鋼板の磁化装置の概略構成を示す斜視図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A steel plate magnetizing apparatus according to the present invention will be described below with reference to one embodiment shown in FIGS. FIG. 1 is a front view showing a schematic configuration of a magnetizing apparatus for a steel sheet of the present invention, and FIG. 2 is a perspective view showing a schematic configuration of a magnetizing apparatus for a steel sheet of the present invention.
【００１５】図１及び図２において、１１は欠陥検査の
対象となる鋼板であり、図１にあっては紙面における表
裏面方向に移動する。１２は鋼板１１の幅方向に所定の
間隔、例えば５０〜１５０ｍｍを存して起立配置した２
つの磁極であり、これらの磁極１２の上端は継鉄１３で
接続されている。１４は前記継鉄１３に巻回された磁化
コイルであり、この磁化コイル１４に電流を流すことに
より、一方の磁極１２をＮ極に、また他方の磁極をＳ極
に帯磁させ、鋼板１１をその幅方向に磁化するものであ
る。In FIGS. 1 and 2, reference numeral 11 denotes a steel plate which is a target of the defect inspection, and in FIG. 12 stands upright at a predetermined interval in the width direction of the steel plate 11, for example 50 to 150 mm.
There are two magnetic poles, and the upper ends of these magnetic poles 12 are connected by a yoke 13. Reference numeral 14 is a magnetizing coil wound around the yoke 13. By passing a current through the magnetizing coil 14, one magnetic pole 12 is magnetized to the N pole and the other magnetic pole is magnetized to the S pole, and the steel plate 11 is magnetized. It is magnetized in the width direction.
【００１６】１５は前記２つの磁極１２間で鋼板１１
に、例えば５〜４０ｍｍの間隔を存して近接配置される
強磁性板であり、例えば０．５〜１０ｍｍの厚みの鉄，
ニッケル，コバルトの板が用いられる。この強磁性板１
５は２つの磁極１２間の間隔と略同じ幅を有しており、
磁化方向の長さは磁化する範囲によって変化するが、略
磁化する範囲と同じ長さとする。なお、この強磁性板１
５の保持方法としては、例えば図２に示すように、磁気
センサー群１６を保持するセンサー保持装置１７上、も
しくはセンサー保持装置１７内に組み込めば、鋼板１１
と強磁性板１５との間隔を適宜変更することが可能とな
る。Reference numeral 15 denotes a steel plate 11 between the two magnetic poles 12.
Is a ferromagnetic plate closely arranged at a distance of, for example, 5 to 40 mm, for example, iron having a thickness of 0.5 to 10 mm,
Plates of nickel and cobalt are used. This ferromagnetic plate 1
5 has a width substantially the same as the distance between the two magnetic poles 12,
The length in the magnetization direction varies depending on the magnetized range, but it is set to be substantially the same as the magnetized range. In addition, this ferromagnetic plate 1
As a method of holding the steel sheet 5, for example, as shown in FIG. 2, the steel plate 11 can be formed on the sensor holding device 17 that holds the magnetic sensor group 16 or by incorporating it in the sensor holding device 17.
It is possible to appropriately change the distance between the and the ferromagnetic plate 15.
【００１７】このように、強磁性板１５を配設した本発
明の鋼板の磁化装置にあっては、２つの磁極１２と継鉄
１３及び鋼板１１を一部に含む磁気的な回路における一
方の磁極１２から広がりをもって鋼板１１に流れていた
浮遊磁場は、２つの磁極１２と継鉄１３及び強磁性板１
５を一部に含む磁気的な回路を通過して他方の磁極１２
へ流れてゆき、不要な浮遊磁場を抑制できる。As described above, in the steel plate magnetizing apparatus of the present invention in which the ferromagnetic plate 15 is disposed, one of the magnetic poles including the two magnetic poles 12, the yoke 13 and the steel plate 11 is included in the magnetic circuit. The stray magnetic field flowing from the magnetic pole 12 to the steel plate 11 in a spread state is generated by the two magnetic poles 12, the yoke 13 and the ferromagnetic plate 1.
The other magnetic pole 12 passes through a magnetic circuit including 5 as a part.
And the unwanted stray magnetic field can be suppressed.
【００１８】例えば図３は、１５０ｍｍの範囲を磁化す
る場合において、厚さ１．２ｍｍ、磁化方向の長さ１５
０ｍｍの強磁性板（鉄製）をセンサー保持装置の中に組
み込んで鋼板上１０ｍｍの位置に設置した本発明装置
と、強磁性板を設置しない従来装置において、鋼板上に
発生する浮遊磁場をガウスメータで測定し、その分布状
態を比較した結果を示す図である。For example, in FIG. 3, when magnetizing a range of 150 mm, the thickness is 1.2 mm and the length in the magnetizing direction is 15 mm.
In a device of the present invention in which a 0 mm ferromagnetic plate (made of iron) is installed in a sensor holding device and installed at a position of 10 mm on a steel plate, and in a conventional device in which no ferromagnetic plate is installed, a stray magnetic field generated on the steel plate is measured by a Gauss meter. It is a figure which shows the result of having measured and compared the distribution state.
【００１９】図３の横軸は２つの磁極の中心からの離間
距離、縦軸は各位置での鋼板上０．５ｍｍの位置に発生
する浮遊磁場の垂直成分（Ｏｅ）である。図３中の○印
は本発明装置を使用した場合の結果を、また●印は従来
装置を使用した場合の結果を示す。図３より、本発明装
置では２つの磁極間の中心から磁極に至る間において全
般的に浮遊磁場を抑制でき、特に磁極に近い部分では大
幅に抑制できているのが判る。The horizontal axis of FIG. 3 is the distance from the center of the two magnetic poles, and the vertical axis is the vertical component (Oe) of the stray magnetic field generated at the position of 0.5 mm on the steel plate at each position. 3 shows the result when the device of the present invention was used, and ● shows the result when the conventional device was used. It can be seen from FIG. 3 that in the device of the present invention, the stray magnetic field can be generally suppressed from the center between the two magnetic poles to the magnetic poles, and can be greatly suppressed particularly in the portion close to the magnetic poles.
【００２０】図４は図３と同じ本発明装置を使用した場
合において、検査対象となる鋼板の厚みを変化させた時
の浮遊磁場を図３の場合と同様にガウスメータで測定
し、その分布状態を比較した結果を示す図である。図４
より、鋼板の厚みが変化しても浮遊磁場の分布はほとん
ど変化しないことが判る。これより鋼板の厚みに関係な
く浮遊磁場が抑制できることは明らかである。FIG. 4 shows the distribution state of the stray magnetic field when the thickness of the steel sheet to be inspected is changed by the Gauss meter as in the case of FIG. 3 when the apparatus of the present invention same as that of FIG. 3 is used. It is a figure which shows the result of having compared. FIG.
From this, it can be seen that the distribution of the stray magnetic field hardly changes even if the thickness of the steel sheet changes. From this, it is clear that the stray magnetic field can be suppressed regardless of the thickness of the steel sheet.
【００２１】[0021]
【発明の効果】以上説明したように、本発明の鋼板の磁
化装置は、２つの磁極間で鋼板に近接して強磁性板を配
置することで、２つの磁極と継鉄及び鋼板を一部に含む
磁気的な回路と、２つの磁極と継鉄及び強磁性板を一部
に含む磁気的な回路の２つの回路を形成し、一方の磁極
から広がりをもって鋼板に流れていた浮遊磁場を、強磁
性板を一部に含む磁気的な回路を通過させて他方の磁極
へ流すので、浮遊磁場抑制用の磁化装置を別途設置する
ことなく鋼板上の空間に発生する不要な浮遊磁場を抑制
でき、鋼板の欠陥が高感度に検出可能となる。As described above, the magnetizing apparatus for a steel sheet according to the present invention disposes the two magnetic poles, the yoke and the steel sheet in part by disposing the ferromagnetic plate between the two magnetic poles in the vicinity of the steel sheet. A magnetic circuit including two magnetic poles and a magnetic circuit including two magnetic poles and a yoke and a ferromagnetic plate as a part, and the stray magnetic field flowing from one magnetic pole to the steel sheet with a spread, Since it passes through a magnetic circuit that includes a ferromagnetic plate in one part and flows to the other magnetic pole, it is possible to suppress unnecessary stray magnetic fields generated in the space above the steel plate without separately installing a magnetizing device for suppressing stray magnetic fields. The defect of the steel sheet can be detected with high sensitivity.
【図１】本発明鋼板の磁化装置の概略構成を示す正面図
である。FIG. 1 is a front view showing a schematic configuration of a magnetizing device for a steel sheet of the present invention.
【図２】本発明鋼板の磁化装置の概略構成を示す斜視図
である。FIG. 2 is a perspective view showing a schematic configuration of a magnetizing device for a steel sheet of the present invention.
【図３】本発明装置と従来装置を使用した場合におい
て、鋼板上に発生する浮遊磁場をガウスメータで測定
し、その分布状態を比較した結果を示す図である。FIG. 3 is a diagram showing the results of comparing stray magnetic fields generated on a steel sheet with a Gauss meter and comparing their distributions when the device of the present invention and a conventional device are used.
【図４】本発明装置を使用した場合において、鋼板の厚
みを変化させた時の浮遊磁場をガウスメータで測定し、
その分布状態を比較した結果を示す図である。FIG. 4 is a graph showing a stray magnetic field when a thickness of a steel sheet is changed, measured by a Gauss meter, when the device of the present invention is used,
It is a figure which shows the result of having compared the distribution state.
【図５】従来装置の概略構成を示す正面図である。FIG. 5 is a front view showing a schematic configuration of a conventional device.
【図６】従来装置を使用した場合の磁極から鋼板へ流れ
る磁力線を示す図である。FIG. 6 is a diagram showing lines of magnetic force flowing from a magnetic pole to a steel plate when a conventional device is used.
【図７】従来装置を使用した場合の浮遊磁場の分布を示
す図である。FIG. 7 is a diagram showing a distribution of a stray magnetic field when a conventional device is used.
【図８】特開昭５０−１３８３９９号公報で開示された
装置の説明図である。FIG. 8 is an explanatory diagram of an apparatus disclosed in Japanese Patent Laid-Open No. 50-138399.
【図９】１９９０年発行の「製鉄研究第３３９号」第５
７〜６２頁で開示された装置の説明図である。[Fig. 9] No. 5 "Ironmaking Research No. 339" issued in 1990
FIG. 6 is an illustration of the device disclosed on pages 7-62.
１１ 鋼板 １２ 磁極 １３ 継鉄 １４ 磁化コイル １５ 強磁性板 11 Steel Plate 12 Magnetic Pole 13 Yoke 14 Magnetizing Coil 15 Ferromagnetic Plate
Claims (1)
向に起立配置した２つの磁極と、これらの磁極を接続す
る継鉄と、前記２つの磁極をＮ極とＳ極に帯磁させて鋼
板を幅方向に磁化する磁化コイルと、前記２つの磁極間
で鋼板に近接して配置される強磁性板を備えたことを特
徴とする鋼板の磁化装置。1. A pair of magnetic poles standing upright in the width direction of a steel sheet with a predetermined space therebetween, a yoke connecting these magnetic poles, and the two magnetic poles being magnetized into N poles and S poles. A magnetizing device for a steel sheet, comprising: a magnetizing coil for magnetizing the steel sheet in the width direction; and a ferromagnetic plate disposed between the two magnetic poles and close to the steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14616894A JPH0815227A (en) | 1994-06-28 | 1994-06-28 | Magnetizing device for steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14616894A JPH0815227A (en) | 1994-06-28 | 1994-06-28 | Magnetizing device for steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0815227A true JPH0815227A (en) | 1996-01-19 |
Family
ID=15401674
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14616894A Pending JPH0815227A (en) | 1994-06-28 | 1994-06-28 | Magnetizing device for steel plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0815227A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008122138A (en) * | 2006-11-09 | 2008-05-29 | Nippon Steel Corp | Method and instrument for measuring magnetic characteristics and mechanical strength of steel sheet |
| KR101353811B1 (en) * | 2012-03-20 | 2014-01-22 | 주식회사 포스코 | Steel magnetization apparatus |
| WO2021125186A1 (en) | 2019-12-20 | 2021-06-24 | Ｊｆｅスチール株式会社 | Magnetic leakage inspecting device, and defect inspecting method |
| CN114544044A (en) * | 2022-02-23 | 2022-05-27 | 北京奇力建通工程技术有限公司 | Magnetic flux sensor detection member and open type magnetic flux sensor |
-
1994
- 1994-06-28 JP JP14616894A patent/JPH0815227A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008122138A (en) * | 2006-11-09 | 2008-05-29 | Nippon Steel Corp | Method and instrument for measuring magnetic characteristics and mechanical strength of steel sheet |
| JP4512079B2 (en) * | 2006-11-09 | 2010-07-28 | 新日本製鐵株式会社 | Apparatus and method for measuring magnetic properties and mechanical strength of thin steel sheet |
| KR101353811B1 (en) * | 2012-03-20 | 2014-01-22 | 주식회사 포스코 | Steel magnetization apparatus |
| WO2021125186A1 (en) | 2019-12-20 | 2021-06-24 | Ｊｆｅスチール株式会社 | Magnetic leakage inspecting device, and defect inspecting method |
| KR20220098019A (en) | 2019-12-20 | 2022-07-08 | 제이에프이 스틸 가부시키가이샤 | Leakage magnetic inspection device and defect inspection method |
| CN114544044A (en) * | 2022-02-23 | 2022-05-27 | 北京奇力建通工程技术有限公司 | Magnetic flux sensor detection member and open type magnetic flux sensor |
| CN114544044B (en) * | 2022-02-23 | 2024-05-10 | 北京奇力建通工程技术有限公司 | Magnetic flux sensor detecting member and open magnetic flux sensor |
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