JPH02311776A - Apparatus and method for measuring magnetic characteristics of steel material - Google Patents
Apparatus and method for measuring magnetic characteristics of steel materialInfo
- Publication number
- JPH02311776A JPH02311776A JP13267189A JP13267189A JPH02311776A JP H02311776 A JPH02311776 A JP H02311776A JP 13267189 A JP13267189 A JP 13267189A JP 13267189 A JP13267189 A JP 13267189A JP H02311776 A JPH02311776 A JP H02311776A
- Authority
- JP
- Japan
- Prior art keywords
- steel material
- coil
- low frequency
- measured
- 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.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 55
- 239000010959 steel Substances 0.000 title claims abstract description 55
- 239000000463 material Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 46
- 230000005284 excitation Effects 0.000 claims description 33
- 230000035699 permeability Effects 0.000 abstract description 14
- 230000004907 flux Effects 0.000 abstract description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000005415 magnetization Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 7
- 238000009826 distribution Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Measuring Magnetic Variables (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、鋼材、特に磁気特性の良否が問題となる鋼材
の磁気特性を非接触で連続して測定する装置及びその使
用方法に関するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an apparatus and method for continuously measuring the magnetic properties of steel materials in a non-contact manner, particularly steel materials whose magnetic properties are of concern. be.
［従来の技術］
従来は、鋼板の磁気特性の測定方法としてＪＩＳＣ−２
５５０で規定されているエプスタイン試験法があるが、
試料の採取を必要とするオフライン試験であるため、測
定値を製造ラインに迅速に反映させることが困難であっ
た。[Prior art] Conventionally, JISC-2 was used as a method for measuring the magnetic properties of steel sheets.
There is an Epstein test method prescribed in 550,
Since this was an off-line test that required sample collection, it was difficult to quickly reflect the measured values on the production line.
また、オンラインで磁気特性を測定する装置として、例
えば、特開昭４９−６９９１号公報によって知られてい
るように、移動する鋼板を覆うように角筒状の鉄心コア
を設け、励磁コイルと検出コイルにより起磁力と磁束密
度の関係を示したＢ−Ｈカーブを作成し、最大透磁率や
保磁力等を求める方法が実施されている。In addition, as a device for measuring magnetic properties online, for example, as known from Japanese Patent Application Laid-Open No. 49-6991, a rectangular cylindrical iron core is provided to cover a moving steel plate, and an excitation coil and a detection device are used. A method has been implemented in which a B-H curve showing the relationship between magnetomotive force and magnetic flux density is created using a coil, and maximum magnetic permeability, coercive force, etc. are determined.
［発明が解決しようとする課ｆｆｉ］
特開昭４９−６９９１号公報に開示されているような方
法で磁気特性を求める場合には、あらかじめＢ−Ｈカー
ブを作成し、それに基づいて最大透磁率等を求めなけれ
ばならず、高価な演算装置を必要とするという問題があ
った。[Problem to be solved by the inventionffi] When determining magnetic properties using the method disclosed in Japanese Patent Application Laid-open No. 49-6991, a B-H curve is created in advance and the maximum magnetic permeability is determined based on it. etc., which requires an expensive arithmetic device.
また、鋼板の製造ラインの操業条件を決定するためには
、板幅方向の磁気特性の分布を測定することが必要であ
るが、この方法では、検出ヘッドが鋼板全体を覆う構造
になっているため、鋼板の局所的な磁気特性を測定する
ことは不可能であった。In addition, in order to determine the operating conditions of a steel plate production line, it is necessary to measure the distribution of magnetic properties in the width direction of the steel plate, but with this method, the detection head is structured to cover the entire steel plate. Therefore, it was impossible to measure the local magnetic properties of the steel sheet.
本発明は簡単な回路構成により、調成製造のオンライン
で最大透磁率等を測定する装置及び被測定鋼材に非接触
で局所的な磁気特性の測定を行なうことのできる装置、
ならびにその使用方法を提供することを目的とするもの
である。The present invention provides an apparatus that uses a simple circuit configuration to measure maximum magnetic permeability, etc. on-line during preparation manufacturing, and an apparatus that can measure local magnetic properties without contacting the steel material to be measured.
The purpose of the present invention is to provide a method for using the same.
［課題を解決するための手段］
本発明に係る鋼材の磁気特性７１Ｐ１定装置は、低周波
励磁コイルが巻装されたＵ字形コアと、このＵ字形コア
の両脚部に互いに逆極性となるように巻装された一対の
高周波励磁コイルと、前記Ｕ字形コアの脚部間に設けら
れ磁化された被測定鋼材の磁気特性を検出する検出コイ
ルとからなる検出ヘッド部を備えたものであり、また
上記検出ヘッド部の検出コイルからの検出信号を検波す
る振幅検波器と、この振幅検波器の出力を微分する微分
器の出力のピーク値又は前記振幅検波器の出力のピーク
値を検波するピーク検波器とを備えたものである。さら
に、
上記装置の使用方法に関するものである。[Means for Solving the Problems] The device for determining magnetic properties 71P1 of steel according to the present invention includes a U-shaped core around which a low-frequency excitation coil is wound, and a U-shaped core having opposite polarities on both legs of the U-shaped core. A detection head section comprising a pair of high-frequency excitation coils wound around the U-shaped core and a detection coil installed between the legs of the U-shaped core to detect the magnetic characteristics of the magnetized steel material to be measured, Further, an amplitude detector detects the detection signal from the detection coil of the detection head, and a peak value of the output of the differentiator that differentiates the output of the amplitude detector, or a peak value of the output of the amplitude detector. It is equipped with a wave detector. Furthermore, it relates to a method of using the above device.
［作用］
被測定鋼材は低周波励磁コイルにより低周波で周期的に
飽和磁化される。そして高周波励磁コイルによる微少な
高周波磁化がその上に重畳される。[Operation] The steel material to be measured is periodically saturated magnetized at low frequency by the low frequency excitation coil. Then, a minute amount of high-frequency magnetization by a high-frequency excitation coil is superimposed thereon.
検出コイルはＵ字形コアの脚部の中間にあるので、低周
波励磁コイルによる磁束は検出されない。一方、高周波
励磁コイルはＵ字形コアの両脚部に互いに逆特性となる
ように設けであるので、各々の高周波励磁コイルによる
磁束は同方向となり、検出コイルにより検出される。Since the detection coil is in the middle of the legs of the U-shaped core, the magnetic flux due to the low frequency excitation coil is not detected. On the other hand, since the high-frequency excitation coils are provided on both legs of the U-shaped core so as to have opposite characteristics, the magnetic fluxes from each high-frequency excitation coil are in the same direction and are detected by the detection coil.
被測定鋼材を通過する高周波磁束は、被測定鋼材の微分
透磁率と関係を有し、低周波励磁コイルの励磁が小さい
ときは、被ａ１定鋼材の微分透磁率が大きいので検出コ
イルを通過する磁束の変化が大きいが、低周波励磁コイ
ルの励磁が大きいときは被測定鋼材は磁気飽和に近づき
微分透磁率は小さくなるので、検出コイルを通過する磁
束の変化は小さくなる。The high frequency magnetic flux that passes through the steel material to be measured has a relationship with the differential magnetic permeability of the steel material to be measured, and when the excitation of the low frequency excitation coil is small, the differential permeability of the A1 steel material to be measured is large, so it passes through the detection coil. Although the change in magnetic flux is large, when the excitation of the low-frequency excitation coil is large, the steel material to be measured approaches magnetic saturation and the differential magnetic permeability becomes small, so the change in the magnetic flux passing through the detection coil becomes small.
よって、検出コイルを通過する磁束により誘起される電
圧を振幅検波してそのピーク値をｎ１定すれば、その値
が微分透磁率の最大値、即ち最大透磁率に対応する。Therefore, if the amplitude of the voltage induced by the magnetic flux passing through the detection coil is detected and its peak value is determined by n1, that value corresponds to the maximum value of the differential magnetic permeability, that is, the maximum magnetic permeability.
しかしながら、上記の最大透磁率を検出するたけでは、
検出ヘッド部と鋼材とのギャップが一定のときは精度よ
く測定できるものの、ギャップが変化すると大きな誤差
を生じる。これに対して請求項２のように構成し、Ｂ−
Ｈカーブの最大勾配付近の変化量に着目して振幅検波出
力を微分し、そのピーク値、即ち変化量の最大値を検出
することにより、誤差の少ない磁気特性の測定が可能と
なる。However, just detecting the maximum permeability mentioned above is insufficient.
Although accurate measurements can be made when the gap between the detection head and the steel material is constant, large errors occur when the gap changes. On the other hand, by configuring as claimed in claim 2, B-
By differentiating the amplitude detection output by focusing on the amount of change near the maximum slope of the H curve and detecting its peak value, that is, the maximum value of the amount of change, it is possible to measure the magnetic characteristics with less error.
［実施例］
第１図は本発明実施例のブロック図である。図において
、１は低周波発振器、２は低周波発振器１の出力を増幅
する電力増幅器、３は高周波発振器、４は高周波発振器
３の出力を増幅する電力増幅器である。５は検出ヘッド
部で、６は電力増幅器２を介して低周波電流が供給され
る低周波励磁コイル、７，８は互いに逆極性に直列接続
され、電力増幅器４を介して高周波電流が供給される高
周波励磁コイル、９は磁気検出器としての検出コイルで
ある。[Embodiment] FIG. 1 is a block diagram of an embodiment of the present invention. In the figure, 1 is a low frequency oscillator, 2 is a power amplifier that amplifies the output of the low frequency oscillator 1, 3 is a high frequency oscillator, and 4 is a power amplifier that amplifies the output of the high frequency oscillator 3. 5 is a detection head section, 6 is a low frequency excitation coil to which a low frequency current is supplied via the power amplifier 2, 7 and 8 are connected in series with mutually opposite polarities, and a high frequency current is supplied via the power amplifier 4. 9 is a detection coil serving as a magnetic detector.
この検出ヘッド部５は、第２図に示すように、Ｕ字形の
コアｌＯの中央部には低周波励磁コイル６か巻装され、
両脚部には高周波励磁コイル７．８がそれぞれ巻装され
ており、高周波励磁コイル７゜８の間に位置するように
検出コイル９を配置したものである。そして、コアＩＯ
の両脚部の先端面及び検出コイル９は、被測定鋼材１１
から離間してセットされる。As shown in FIG. 2, this detection head section 5 has a low frequency excitation coil 6 wound around the center of a U-shaped core lO.
High-frequency excitation coils 7.8 are wound around both legs, respectively, and a detection coil 9 is placed between the high-frequency excitation coils 7.8. And core IO
The end surfaces of both legs and the detection coil 9 are connected to the steel material 11 to be measured.
It is set apart from the
検出コイル９の出力信号は信号増幅器１２により増幅さ
れて振幅検波器■３に加えられ、振幅検波される。つい
でその出力を低周波増幅器１４で増幅し、微分器Ｉ５に
よって得られた微分出力をピーク検波器１６に加え、ピ
ーク検出を行なう。ピーク検波器１６の出力を［１］と
する。また、必要に応じて、低周波増幅器１４の出力を
ピーク検出器１７に加えてピーク検出を行なう。ピーク
検波器１７の出力を［２］とする。The output signal of the detection coil 9 is amplified by the signal amplifier 12 and applied to the amplitude detector 3, where the amplitude is detected. The output is then amplified by the low frequency amplifier 14, and the differential output obtained by the differentiator I5 is applied to the peak detector 16 to perform peak detection. Let the output of the peak detector 16 be [1]. Further, if necessary, the output of the low frequency amplifier 14 is applied to the peak detector 17 to perform peak detection. Let the output of the peak detector 17 be [2].
次に、上記のように構成した本発明の詳細な説明する。Next, the present invention configured as described above will be explained in detail.
検出ヘッド部５を被測定鋼材１１に近接させて配設し、
低周波励磁コイル６に低周波電流を供給すると共に、一
対の高周波励磁コイル７．８に高周波電流を供給する。The detection head section 5 is arranged close to the steel material to be measured 11,
A low frequency current is supplied to the low frequency excitation coil 6, and a high frequency current is supplied to the pair of high frequency excitation coils 7.8.
これにより、低周波励磁コイル６によって第２図の（ａ
）で示す磁気回路が形成され、高周波励磁コイル７．８
により第２図に（ｂ）で示すように互いに反対方向の磁
気回路が形成される。As a result, the low frequency excitation coil 6 causes the
) is formed, and the high frequency excitation coil 7.8
As a result, magnetic circuits in opposite directions are formed as shown in FIG. 2(b).
被測定鋼材■１にはこれらの重畳した磁束が１通過する
が、低周波起磁力の方が大きいため、被ａ′ｌｌｊ定鋼
材１１の磁化は、低周波励磁コイル６に供給される低周
波電流によって支配される。したがって、被測定鋼材ｉ
ｔを通過する高周波磁束は、ある時点での低周波電流に
よって磁化された被測定鋼材ＩＩの微分透磁率に対応し
た値となる。These superimposed magnetic fluxes pass through the steel material 1 to be measured, but since the low-frequency magnetomotive force is larger, the magnetization of the steel material 11 to be measured is caused by the low-frequency magnetization supplied to the low-frequency excitation coil 6. Governed by electric current. Therefore, the steel material to be measured i
The high frequency magnetic flux passing through t has a value corresponding to the differential magnetic permeability of the steel material II to be measured that has been magnetized by the low frequency current at a certain point in time.
第３図は低周波励磁コイル６に供給される低周波電流と
検出コイル９に誘起する電圧等との関係を示す線図で、
（Ａ）は低周波電流の波形、（Ｂ）は検出コイル９の誘
起電圧を示す。前述のように検出コイル９には高周波磁
束によって誘起した電圧（Ｂ図）が検出され、その出力
電圧の振幅は低周波電流が小さいときに最大となり（■
）、低周波電流が大きく被測定鋼材１１が磁気的に飽和
しているときに小さく （＠） 、はぼ一定の値となる
。FIG. 3 is a diagram showing the relationship between the low frequency current supplied to the low frequency excitation coil 6 and the voltage induced in the detection coil 9.
(A) shows the waveform of the low frequency current, and (B) shows the induced voltage in the detection coil 9. As mentioned above, the voltage induced by the high-frequency magnetic flux (Figure B) is detected in the detection coil 9, and the amplitude of the output voltage is maximum when the low-frequency current is small (■
) is small when the low frequency current is large and the steel material 11 to be measured is magnetically saturated (@), and becomes an almost constant value.
検出コイル９の出力は、信号増幅器１２で増幅されたの
ち振幅検波器１３で振幅検波され、正の振幅が検出され
る（（Ｃ）図）。さらに、低周波増幅器１４により増幅
されたのち微分器１５に加えられ、その微分出力（（Ｄ
）図）のピーク値はピーク検波器１６から連続出力され
、出力［１１となる。この出力［１コは被測定鋼材１１
のＢ−Ｈカーブの変化量の最大値に対応する。The output of the detection coil 9 is amplified by a signal amplifier 12, and then subjected to amplitude detection by an amplitude detector 13, and a positive amplitude is detected (FIG. (C)). Furthermore, after being amplified by the low frequency amplifier 14, it is added to the differentiator 15, and its differential output ((D
) The peak value in the figure) is continuously output from the peak detector 16 and becomes the output [11. This output [1 piece is the steel material 11 to be measured
This corresponds to the maximum value of the amount of change in the B-H curve.
また、必要に応じて低周波増幅器１４の出力（第３図（
Ｃ））のピーク値をピーク検出器１７に加えて連続出力
させれば、出力［２］となり、この出力［２］は彼ｎ１
定鋼材１１の最大透磁率に対応する。In addition, the output of the low frequency amplifier 14 (Fig. 3 (
If the peak value of C)) is added to the peak detector 17 and outputted continuously, it becomes output [2], and this output [2] is
It corresponds to the maximum magnetic permeability of the fixed steel material 11.
このようにして得られた出力［１］と出力［２］とによ
って、被測定鋼材１１の磁気特性をオンラインで容易に
測定することができる。Using the output [1] and output [2] thus obtained, the magnetic properties of the steel material 11 to be measured can be easily measured online.
一般に、Ｓｉａ度の高い電磁鋼板においては、Ｓｉ濃度
が６．５％付近で磁気特性が最もよいことが知られてい
る。Generally, it is known that magnetic properties of magnetic steel sheets with a high Si degree are best when the Si concentration is around 6.5%.
本発明の発明者らは、本発明に係る磁気特性測定装置を
使用して、次の条件によりピーク検波器１６の出力［１
］とＳｉ鋼板のＳｉ濃度との関係を調査した。The inventors of the present invention used the magnetic property measuring device according to the present invention to obtain the output [1] of the peak detector 16 under the following conditions.
] and the Si concentration of the Si steel plate were investigated.
（１）使用材料
・被測定鋼材１１：厚さ０．１ ＝０．３５＋ａｍ（７
）Ｓｉ鋼板・コア１０の材質：積層けい素鋼板
断面２０Ｘ５０−
平均磁路長３５０ ｍｍ
・コアｌＯと被測定鋼材１１との間隙：２ｗ（２）励磁
条件
・低周波側
低周波励磁コイル６：１ｍ■φエナメル線巻数５００回
励磁電流： ２０Ｈｚ 、、 １Ｉａｘ±５Ａ・高周
波側
高周波励磁コイル７．８二
０．３１１Ｉｍφ エナメル線
巻数３０回 各１個
・励磁電流 ４ ＫＨｚ 、 ｗａｘ±ＩＡ（３）検
出条件
・検出コイル９ ： ０．３ ｍｍφエナメル線巻数
２００回
上記により実験したところ、第４図に示すような結果が
得られた。これにより、本発明の磁気特性測定装置を使
用すれば、Ｓｔ鋼板の製造中に鋼板のＳｉ濃度適中や磁
気特性の保証をオンラインで行なうことができる。また
、検出ヘッド部５を鋼板の幅方向に移動させたり並列に
設置することにより、板幅方向の磁気特性のプロフィー
ル（分布）を測定することもできる。(1) Materials used / Steel material to be measured 11: Thickness 0.1 = 0.35 + am (7
) Material of Si steel plate/core 10: Laminated silicon steel plate cross section 20 x 50 - Average magnetic path length 350 mm - Gap between core lO and steel material to be measured 11: 2w (2) Excitation conditions - Low frequency side low frequency excitation coil 6: 1 m φ Number of turns of enameled wire: 500 times Excitation current: 20Hz,, 1Iax±5A・High frequency side high frequency excitation coil 7.8×0.311Imφ Number of turns of enameled wire: 30 times 1 each・Exciting current: 4 KHz, wax±IA (3) Detection conditions/Detection coil 9: 0.3 mmφ enamelled wire, number of turns
When the above experiment was carried out 200 times, the results shown in FIG. 4 were obtained. As a result, by using the magnetic property measuring device of the present invention, it is possible to measure the Si concentration of the steel plate and guarantee the magnetic properties online during the production of the St steel plate. Furthermore, by moving the detection head section 5 in the width direction of the steel plate or installing them in parallel, it is also possible to measure the profile (distribution) of the magnetic properties in the width direction of the steel plate.
上記の説明では、Ｂ−Ｈカーブの変化量の最大値測定用
のピーク検波器１Ｂと、最大透磁率測定用の検波器１７
とを別個に設けた場合を示したが、両者を同時に測定す
る必要のない場合は、第５図に示すように微分器１５と
ピーク検波器１６との間に切換器１８を設け、微分器１
５の出力を切換器１８を介してピーク検出器１Ｂに加え
ると共に、低周波増幅器１４の出力を切換器１８を介し
てピーク検波器ＩＢに加えるようにしてもよい。In the above explanation, the peak detector 1B for measuring the maximum value of the amount of change in the B-H curve and the detector 17 for measuring the maximum magnetic permeability are used.
However, if it is not necessary to measure both at the same time, a switch 18 is provided between the differentiator 15 and the peak detector 16 as shown in FIG. 1
The output of the low frequency amplifier 14 may be applied to the peak detector IB via the switch 18, and the output of the low frequency amplifier 14 may be applied to the peak detector IB via the switch 18.
［発明の効果］
以上の説明から明らかなように、本発明は被測定鋼材を
非接触で磁化させてその磁気特性を検出するようにした
ので、被測定鋼材の磁気特性をオンラインでｉｎ）定す
ることが可能になり、また、生産ラインにおける被ｌｐ
１定鋼材の局所的な磁気特性をａ＞＋定することもでき
る。[Effects of the Invention] As is clear from the above explanation, the present invention detects the magnetic properties of the steel material to be measured by magnetizing it without contact, so that the magnetic properties of the steel material to be measured can be determined online. It also makes it possible to
The local magnetic properties of a constant steel material can also be determined as a>+.
また、Ｓ１濃度の高い鋼板等の磁気特性をオンラインで
測定できるので、操業条件の決定、品質保証等に対して
高い効果が得られ、生産性を向上させることができる等
、実施による効果大である。In addition, since the magnetic properties of steel plates with high S1 concentration can be measured online, it is highly effective in determining operating conditions, quality assurance, etc., and productivity can be improved. be.
第１図は本発明実施例のブロック図、第２図は検出ヘッ
ド部の実施例の説明図、第３図（Ａ）〜（Ｄ）は本発明
の各部の波形図、第４図は本発明の出力［［］と鋼板中
のＳｉａ度との関係を示す線図、第５図は本発明の他の
実施例のブロック図である。
１：低周波発振器、３：高周波発振器、５：検出ヘッド
部、６：低周波励磁コイル、７，８：高周波励磁コイル
、９：検出コイル、１０ニコア、１１：被測定鋼材、１
３：振幅検波器、１５：微分器、１６゜１７：ピーク検
波器、１８：切換器。Figure 1 is a block diagram of an embodiment of the present invention, Figure 2 is an explanatory diagram of an embodiment of the detection head section, Figures 3 (A) to (D) are waveform diagrams of various parts of the present invention, and Figure 4 is FIG. 5 is a diagram showing the relationship between the output [[] of the invention and the degree of Sia in the steel plate, and FIG. 5 is a block diagram of another embodiment of the invention. 1: Low frequency oscillator, 3: High frequency oscillator, 5: Detection head section, 6: Low frequency excitation coil, 7, 8: High frequency excitation coil, 9: Detection coil, 10 Nicore, 11: Steel material to be measured, 1
3: Amplitude detector, 15: Differentiator, 16° 17: Peak detector, 18: Switcher.
Claims (3)
ヘッド部により被測定鋼材を磁化し、該被測定鋼材の磁
気特性を検出コイルで検出する装置において、 低周波励磁コイルが巻装されたＵ字形コアと、このＵ字
形コアの両脚部に互いに逆極性となるように巻装された
一対の高周波励磁コイルと、前記Ｕ字形コアの脚部間に
設けられ磁化された被測定鋼材の磁気特性を検出する検
出コイルとからなる検出ヘッド部を備えたことを特徴と
する鋼材の磁気特性測定装置。(1) In a device that magnetizes a steel material to be measured using a detection head having a U-shaped core around which an excitation coil is wound, and detects the magnetic characteristics of the steel material to be measured using a detection coil, the detection head has a U-shaped core around which a low frequency excitation coil is wound. A U-shaped core, a pair of high-frequency excitation coils wound around both legs of the U-shaped core so as to have opposite polarities, and a magnetized steel material to be measured that is provided between the legs of the U-shaped core. 1. An apparatus for measuring magnetic properties of steel, characterized by comprising a detection head section comprising a detection coil for detecting magnetic properties.
波器と、この振幅検波器の出力を微分する微分器の出力
のピーク値又は前記振幅検波器の出力のピーク値を検波
するピーク検波器とを備えたことを特徴とする請求項（
１）記載の鋼材の磁気特性測定装置。(2) An amplitude detector that detects the detection signal from the detection coil; and a peak detector that detects the peak value of the output of the differentiator that differentiates the output of the amplitude detector or the peak value of the output of the amplitude detector. A claim characterized in that it comprises (
1) The apparatus for measuring magnetic properties of steel described above.
に互いに逆極性となるように高周波励磁コイルを巻装し
、前記両脚部の間に検出コイルを設けてなる検出ヘッド
をＳｉ濃度の高い鋼材に近接して設置し、前記検出コイ
ルの出力を振幅検波したのち微分した出力のピーク値、
又は前記振幅検波した出力のピーク値を検波し、該検波
出力により前記鋼材の磁気特性を測定することを特徴と
する鋼材の磁気特性測定方法。(3) High-frequency excitation coils are wound around both legs of a U-shaped core around which a low-frequency excitation coil is wound so that the polarities are opposite to each other, and a detection coil is provided between the two legs. The peak value of the output obtained by amplitude-detecting the output of the detection coil, which is installed close to a steel material with a high
Alternatively, a method for measuring magnetic properties of a steel material, comprising detecting a peak value of the amplitude-detected output, and measuring the magnetic properties of the steel material based on the detected output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13267189A JPH02311776A (en) | 1989-05-29 | 1989-05-29 | Apparatus and method for measuring magnetic characteristics of steel material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13267189A JPH02311776A (en) | 1989-05-29 | 1989-05-29 | Apparatus and method for measuring magnetic characteristics of steel material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02311776A true JPH02311776A (en) | 1990-12-27 |
Family
ID=15086777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13267189A Pending JPH02311776A (en) | 1989-05-29 | 1989-05-29 | Apparatus and method for measuring magnetic characteristics of steel material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02311776A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010025859A (en) * | 2008-07-23 | 2010-02-04 | Tokyo Parts Ind Co Ltd | Magnetic sensor and actuator using the same |
| KR20190089027A (en) * | 2016-12-01 | 2019-07-29 | 도쿄 세이꼬 가부시키가이샤 | Damage evaluation method and damage evaluation device of magnetic cord |
| CN113008939A (en) * | 2019-12-18 | 2021-06-22 | 财团法人工业技术研究院 | Electromagnetic characteristic measuring device and system and electromagnetic characteristic measuring method |
-
1989
- 1989-05-29 JP JP13267189A patent/JPH02311776A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010025859A (en) * | 2008-07-23 | 2010-02-04 | Tokyo Parts Ind Co Ltd | Magnetic sensor and actuator using the same |
| KR20190089027A (en) * | 2016-12-01 | 2019-07-29 | 도쿄 세이꼬 가부시키가이샤 | Damage evaluation method and damage evaluation device of magnetic cord |
| CN113008939A (en) * | 2019-12-18 | 2021-06-22 | 财团法人工业技术研究院 | Electromagnetic characteristic measuring device and system and electromagnetic characteristic measuring method |
| JP2021107812A (en) * | 2019-12-18 | 2021-07-29 | インダストリアル テクノロジー リサーチ インスティチュートＩｎｄｕｓｔｒｉａｌ Ｔｅｃｈｎｏｌｏｇｙ Ｒｅｓｅａｒｃｈ Ｉｎｓｔｉｔｕｔｅ | Electromagnetic property measuring device, electromagnetic property measuring system and electromagnetic property measuring method |
| US11573277B2 (en) | 2019-12-18 | 2023-02-07 | Industrial Technology Research Institute | Electromagnetic property measuring device, electromagnetic property measuring system and electromagnetic property measuring method |
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