JP6881204B2

JP6881204B2 - Single plate magnetic property tester

Info

Publication number: JP6881204B2
Application number: JP2017194055A
Authority: JP
Inventors: 政男籔本
Original assignee: Nippon Steel Corp
Current assignee: Nippon Steel Corp
Priority date: 2017-10-04
Filing date: 2017-10-04
Publication date: 2021-06-02
Anticipated expiration: 2037-10-04
Also published as: JP2019066405A

Description

本発明は、単板磁気特性試験器に関し、特に、電磁鋼板等の軟磁性材料の磁気特性を測定するために用いて好適なものである。 The present invention relates to a veneer magnetic property tester, and is particularly suitable for use in measuring the magnetic property of a soft magnetic material such as an electromagnetic steel plate.

電磁鋼板等の軟磁性材料の磁気特性を測定するために単板試験器が用いられる。単板試験器は、単板磁気特性試験器や、単板磁気試験器等とも称される。以下では、単板試験器を単板磁気特性試験器と称する。非特許文献１には、単板磁気特性試験器の巻枠として、形状が、長手方向において貫通する中空の直方体の形状であり、長さが、単板磁気特性試験器の大きさ等に応じて定められた長さである巻枠が記載されている。巻枠は、巻線枠等とも称される。以下の説明では、巻枠を巻線枠と称する。 A veneer tester is used to measure the magnetic properties of soft magnetic materials such as electrical steel sheets. The veneer tester is also referred to as a veneer magnetic property tester, a veneer magnetic tester, or the like. Hereinafter, the veneer tester will be referred to as a veneer magnetic property tester. In Non-Patent Document 1, the winding frame of the veneer magnetic property tester has a shape of a hollow rectangular parallelepiped penetrating in the longitudinal direction, and the length depends on the size of the veneer magnetic property tester and the like. The winding frame, which is the specified length, is described. The winding frame is also referred to as a winding frame or the like. In the following description, the winding frame will be referred to as a winding frame.

非特許文献１に記載の技術では、巻線枠には、一次コイルおよび二次コイルが巻き回される。一次コイルは、励磁コイル等とも称される。以下の説明では、一次コイルを励磁コイルと称する。二次コイルは、磁束密度検出コイルや、Ｂコイル等とも称される。以下の説明では、二次コイルを磁束密度検出コイルと称する。 In the technique described in Non-Patent Document 1, a primary coil and a secondary coil are wound around the winding frame. The primary coil is also referred to as an exciting coil or the like. In the following description, the primary coil will be referred to as an exciting coil. The secondary coil is also referred to as a magnetic flux density detection coil, a B coil, or the like. In the following description, the secondary coil will be referred to as a magnetic flux density detection coil.

単板磁気特性試験器では、巻線枠の中空領域に単板の試験片（１枚の軟磁性材料の板）を配置すると共に、試験片とヨークとで閉磁路が構成されるようにする。そして、励磁コイルに励磁電流を流して試験片を励磁することにより試験片に発生する磁束密度を、磁束密度検出コイルに誘起される誘導起電力に基づいて求める。尚、以下の説明では、軟磁性材料の板を、必要に応じて、軟磁性体板と称する。 In the single plate magnetic property tester, a single plate test piece (one plate of soft magnetic material) is placed in the hollow region of the winding frame, and a closed magnetic path is formed by the test piece and the yoke. .. Then, the magnetic flux density generated in the test piece by passing an exciting current through the exciting coil to excite the test piece is obtained based on the induced electromotive force induced in the magnetic flux density detection coil. In the following description, a plate made of a soft magnetic material will be referred to as a soft magnetic plate, if necessary.

ＪＩＳＣ２５５６：２０１５「単板試験器による電磁鋼帯の磁気特性の測定方法」JIS C 2556: 2015 "Measuring method of magnetic properties of electrical steel strips with a veneer tester"

ところで、軟磁性体板は、平坦化処理されて内部歪が少ない状態で出荷されるが、製品において、軟磁性体板が、弾性変形される状態、または、塑性変形がある状態で使用されると、軟磁性体板の磁気特性が劣化することが知られている。例えば、カットコアやユニコア等の巻鉄心は、軟磁性体板を局部的に曲げることにより構成されるため、このような巻鉄心では、塑性変形がある状態で軟磁性体板が使用される。 By the way, the soft magnetic plate is shipped in a state where it is flattened and has little internal strain, but it is used in a product in a state where the soft magnetic plate is elastically deformed or has plastic deformation. It is known that the magnetic properties of the soft magnetic plate deteriorate. For example, since a wound core such as a cut core or a unicore is formed by locally bending a soft magnetic plate, the soft magnetic plate is used in such a wound core in a state of being plastically deformed.

しかしながら、非特許文献１に記載の技術では、１枚の軟磁性体板を試験片として用いるが、平坦な試験片を前提として巻線枠の寸法が決められていると共に、ヨークの２つの磁極面が同一の平面上に配置される。このため、弾性変形させた試験片や、塑性変形された試験片を巻線枠に配置することが容易ではない。このため、弾性変形させた試験片の磁気特性を測定することや、塑性変形された試験片の磁気特性を測定することが容易ではない。 However, in the technique described in Non-Patent Document 1, one soft magnetic plate is used as a test piece, but the dimensions of the winding frame are determined on the premise of a flat test piece, and the two magnetic poles of the yoke are used. The faces are arranged on the same plane. Therefore, it is not easy to arrange the elastically deformed test piece or the plastically deformed test piece on the winding frame. Therefore, it is not easy to measure the magnetic characteristics of the elastically deformed test piece and the magnetic characteristics of the plastically deformed test piece.

そこで、試験片の曲部を間に挟む２つの平坦な部分にそれぞれ巻線枠を配置することが考えられる。しかしながら、このようにすると、各巻線枠に配置されたコイル間での磁束の漏れが大きくなる虞がある。従って、弾性変形させた試験片の磁気特性を測定することや、塑性変形された試験片の磁気特性を正確に測定することが容易ではない。また、ヨークの２つの磁極面のなす角度が、試験片の曲げ角度に応じた角度となるようにヨークを成形することが考えられる。しかしながら、このようにすると、試験片の曲げ角度が所定の角度である場合にしか、ヨークの磁極面と試験片とを合わせることがない。試験片の曲げ角度が所定の角度でない場合には、試験片を弾性変形させてヨークの磁極面と試験片とを合わせなければならない。例えば、ヨークの２つの磁極面のなす角度を９０°にした場合、塑性変形された試験片の曲げ角度が８０°であると、ヨークの磁極面と試験片とを合わせるために、当該試験片の曲がり部を更に１０°曲げて当該軟磁性体を弾性変形させなければならない。従って、当該試験片の曲がり部の塑性変形による磁気特性の劣化のみを正確に評価することが容易ではない。 Therefore, it is conceivable to arrange the winding frame in each of the two flat portions sandwiching the curved portion of the test piece. However, in this way, there is a possibility that the leakage of magnetic flux between the coils arranged in each winding frame becomes large. Therefore, it is not easy to measure the magnetic characteristics of the elastically deformed test piece and accurately measure the magnetic characteristics of the plastically deformed test piece. Further, it is conceivable to form the yoke so that the angle formed by the two magnetic pole surfaces of the yoke is an angle corresponding to the bending angle of the test piece. However, in this way, the magnetic pole surface of the yoke and the test piece can be aligned only when the bending angle of the test piece is a predetermined angle. If the bending angle of the test piece is not a predetermined angle, the test piece must be elastically deformed to align the magnetic pole surface of the yoke with the test piece. For example, when the angle between the two magnetic pole surfaces of the yoke is 90 ° and the bending angle of the plastically deformed test piece is 80 °, the test piece is aligned with the magnetic pole surface of the yoke. The bent portion of the soft magnetic material must be further bent by 10 ° to elastically deform the soft magnetic material. Therefore, it is not easy to accurately evaluate only the deterioration of the magnetic properties due to the plastic deformation of the bent portion of the test piece.

本発明は、以上のような問題点に鑑みてなされたものであり、弾性変形させた試験片や塑性変形された試験片の磁気特性を正確に測定することができる単板磁気特性試験器を提供することを目的とする。 The present invention has been made in view of the above problems, and is a single-plate magnetic property tester capable of accurately measuring the magnetic properties of an elastically deformed test piece or a plastically deformed test piece. The purpose is to provide.

本発明の単板磁気特性試験器は、１枚の磁性体板で構成される試験片であって、板面が曲げられた状態の試験片の磁気特性を測定する単板磁気特性試験器であって、一端と他端とを貫く中空領域を有する巻線枠と、前記試験片と磁気的に結合され、前記試験片と閉磁路を形成するヨークと、前記試験片を取り巻くように前記巻線枠に対して巻き回されるコイルであって、前記試験片を励磁するための励磁コイルと、前記試験片を取り巻くように前記巻線枠に対して前記励磁コイルよりも内側に巻き回されるコイルであって、前記励磁された前記試験片の内部の磁束密度を検出するための磁束密度検出コイルと、を有し、前記試験片は、前記中空領域に挿入され、前記巻線枠は、可撓性を有し、前記試験片の曲げ形状に応じて曲げられることを特徴とする。 The single-plate magnetic property tester of the present invention is a test piece composed of one magnetic material plate, and is a single-plate magnetic property tester for measuring the magnetic characteristics of the test piece in a state where the plate surface is bent. A winding frame having a hollow region penetrating one end and the other end, a yoke that is magnetically coupled to the test piece to form a closed magnetic path with the test piece, and the winding so as to surround the test piece. A coil that is wound around a wire frame, that is, an exciting coil for exciting the test piece, and a coil that is wound around the winding frame inward of the exciting coil so as to surround the test piece. The coil is provided with a magnetic flux density detecting coil for detecting the magnetic flux density inside the excited test piece, the test piece is inserted into the hollow region, and the winding frame is formed. It is characterized in that it is flexible and can be bent according to the bending shape of the test piece.

本発明によれば、弾性変形させた試験片や塑性変形された試験片の磁気特性を正確に測定することができる単板磁気特性試験器を提供することができる。 According to the present invention, it is possible to provide a veneer magnetic property tester capable of accurately measuring the magnetic properties of an elastically deformed test piece or a plastically deformed test piece.

図１は、単板磁気特性試験器の構成の一例を示す図である。FIG. 1 is a diagram showing an example of the configuration of a single plate magnetic property tester. 図２は、試験片の形状の一例を示す図である。FIG. 2 is a diagram showing an example of the shape of the test piece. 図３は、ヨークの構成の一例を示す図である。FIG. 3 is a diagram showing an example of the configuration of the yoke. 図４は、第１ヨーク部の断面の一例を示す図である。FIG. 4 is a diagram showing an example of a cross section of the first yoke portion. 図５は、第２ヨーク部および第３ヨーク部の配置の第１の例を示す図である。FIG. 5 is a diagram showing a first example of the arrangement of the second yoke portion and the third yoke portion. 図６は、第２ヨーク部および第３ヨーク部の配置の第２の例を示す図である。FIG. 6 is a diagram showing a second example of the arrangement of the second yoke portion and the third yoke portion. 図７は、巻線枠、励磁コイルおよび磁束密度検出コイルの構成の一例を示す図である。FIG. 7 is a diagram showing an example of the configuration of the winding frame, the exciting coil, and the magnetic flux density detection coil. 図８は、巻線枠の構成の一例を示す図である。FIG. 8 is a diagram showing an example of the configuration of the winding frame. 図９は、励磁コイルおよび磁束密度検出コイルの巻き方の一例を示す図である。FIG. 9 is a diagram showing an example of how to wind the exciting coil and the magnetic flux density detection coil. 図１０は、単板磁気特性試験器の構成の変形例を示す図である。FIG. 10 is a diagram showing a modified example of the configuration of the single plate magnetic property tester. 図１１は、変形例のヨークの構成を示す図である。FIG. 11 is a diagram showing a configuration of a yoke of a modified example.

以下、図面を参照しながら、本発明の一実施形態を説明する。尚、各図において、Ｘ軸、Ｙ軸、Ｚ軸は、各図の向きの関係を示すものであり、○の中に●を付しているものは、紙面の奥側から手前側に向かう方向を示し、○の中に×を付しているものは、紙面の手前側から奥側に向かう方向を示す。
図１は、単板磁気特性試験器の構成の一例を示す図である。図２は、試験片Ｓの形状の一例を示す図である。試験片Ｓは、１枚の軟磁性体板（例えば、方向性電磁鋼板または無方向性電磁鋼板）である。本実施形態では、試験片Ｓの平面形状は長方形である。図２（ａ）は、試験片Ｓの板厚部分を示す図であり、図２（ｂ）は、試験片Ｓの板面部分を示す図である。 Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each figure, the X-axis, Y-axis, and Z-axis indicate the relationship of the orientations of each figure, and those marked with ● in ○ go from the back side to the front side of the paper. The direction is indicated, and the one with a cross in the circle indicates the direction from the front side to the back side of the paper.
FIG. 1 is a diagram showing an example of the configuration of a single plate magnetic property tester. FIG. 2 is a diagram showing an example of the shape of the test piece S. The test piece S is one soft magnetic steel plate (for example, a grain-oriented electrical steel sheet or a non-oriented electrical steel sheet). In the present embodiment, the planar shape of the test piece S is rectangular. FIG. 2A is a diagram showing a plate thickness portion of the test piece S, and FIG. 2B is a diagram showing a plate surface portion of the test piece S.

単板磁気特性試験器において、試験片Ｓは、その板面が曲げられた状態になる。図２に示す例では、試験片Ｓは、曲げ稜線が、試験片Ｓの短手方向に沿って、試験片Ｓの短手方向の一端から他端まで延びるように、試験片Ｓの長手方向の中央付近において曲げられる。尚、曲げは、屈曲であっても湾曲であってもよい。ただし、試験片Ｓにねじりが生じないようにするのが好ましい。また、図２に示す例では、曲げ位置が一箇所である場合を例に挙げて示すが、曲げ位置は複数であってもよい。また、変形は、塑性変形であって弾性変形であってもよい。 In the single plate magnetic property tester, the plate surface of the test piece S is in a bent state. In the example shown in FIG. 2, the test piece S has a bending ridge line extending in the longitudinal direction of the test piece S along the lateral direction of the test piece S from one end to the other end in the lateral direction of the test piece S. It is bent near the center of. The bending may be bending or bending. However, it is preferable that the test piece S is not twisted. Further, in the example shown in FIG. 2, the case where the bending position is one place is shown as an example, but the bending position may be a plurality. Further, the deformation may be a plastic deformation and an elastic deformation.

図１において、本実施形態の単板磁気特性試験器は、図２に示すようにして曲げられた状態の試験片Ｓの磁気特性を測定する。単板磁気特性試験器は、ヨーク１００と、巻線枠２００と、励磁コイル３００と、磁束密度検出コイル４００とを有する。
ヨーク１００は、試験片Ｓと磁気的に結合され、ヨーク１００と試験片Ｓとで閉磁路が形成される。 In FIG. 1, the veneer magnetic property tester of the present embodiment measures the magnetic property of the test piece S in a bent state as shown in FIG. The veneer magnetic property tester includes a yoke 100, a winding frame 200, an exciting coil 300, and a magnetic flux density detection coil 400.
The yoke 100 is magnetically coupled to the test piece S, and a closed magnetic path is formed by the yoke 100 and the test piece S.

巻線枠２００には、励磁コイル３００および磁束密度検出コイル４００が巻き回される。巻線枠２００は、その長手方向の両端を貫くように形成された中空領域を有する。巻線枠２００の中空領域に試験片Ｓが挿入される。このようにして試験片Ｓが巻線枠２００の中空領域に配置されると、励磁コイル３００および磁束密度検出コイル４００は、試験片Ｓを取り巻くようになる。 The exciting coil 300 and the magnetic flux density detection coil 400 are wound around the winding frame 200. The winding frame 200 has a hollow region formed so as to penetrate both ends in the longitudinal direction thereof. The test piece S is inserted into the hollow region of the winding frame 200. When the test piece S is arranged in the hollow region of the winding frame 200 in this way, the exciting coil 300 and the magnetic flux density detection coil 400 surround the test piece S.

励磁コイル３００には、試験片Ｓを取り巻くように配置されるコイルであり、試験片Ｓを励磁するための励磁電流が流れるコイルである。磁束密度検出コイル４００は、試験片Ｓを取り巻くように配置されるコイルであり、励磁された試験片Ｓの内部の磁束密度を検出するためのコイルである。磁束密度検出コイル４００の両端に誘起される誘導起電力から、試験片Ｓの内部の磁束密度が求められる。 The exciting coil 300 is a coil arranged so as to surround the test piece S, and is a coil through which an exciting current for exciting the test piece S flows. The magnetic flux density detection coil 400 is a coil arranged so as to surround the test piece S, and is a coil for detecting the magnetic flux density inside the excited test piece S. The magnetic flux density inside the test piece S can be obtained from the induced electromotive force induced at both ends of the magnetic flux density detection coil 400.

ここで、励磁コイル３００および磁束密度検出コイル４００のコイル軸（コイルがつくるループの中心を通る仮想線）は、略同軸であるのが好ましく、同軸であるのがより好ましい。励磁コイル３００から発生する磁束が大きく且つ均一な領域に磁束密度検出コイル４００を配置することができるからである。また、励磁コイル３００のコイル軸と、試験片Ｓの軸（試験片Ｓの中心を通り、試験片Ｓの長手方向に沿う仮想線）と、が略一致するのが好ましく、一致するのがより好ましい。励磁コイル３００から発生する磁束が大きく且つ均一な領域に試験片Ｓを配置することができるからである。 Here, the coil shafts of the exciting coil 300 and the magnetic flux density detection coil 400 (virtual lines passing through the center of the loop formed by the coil) are preferably substantially coaxial, and more preferably coaxial. This is because the magnetic flux density detection coil 400 can be arranged in a region where the magnetic flux generated from the exciting coil 300 is large and uniform. Further, it is preferable that the coil shaft of the exciting coil 300 and the shaft of the test piece S (a virtual line passing through the center of the test piece S and along the longitudinal direction of the test piece S) substantially coincide with each other. preferable. This is because the test piece S can be arranged in a region where the magnetic flux generated from the exciting coil 300 is large and uniform.

次に、本実施形態のヨーク１００について説明する。
図１において、ヨーク１００は、第１ヨーク部１１０、第２ヨーク部１２０、第３ヨーク部１３０、第１取付部１４０、および第２取付部１５０を有する。図３は、ヨーク１００の構成の一例を示す図であり、図１のＡ方向からヨーク１００を見た様子を示す図である。図４は、第１ヨーク部１１０の断面の一例を示す図（図１のＩ−Ｉの部分で切った場合の第１ヨーク部１１０の断面図）である。 Next, the yoke 100 of the present embodiment will be described.
In FIG. 1, the yoke 100 has a first yoke portion 110, a second yoke portion 120, a third yoke portion 130, a first attachment portion 140, and a second attachment portion 150. FIG. 3 is a diagram showing an example of the configuration of the yoke 100, and is a diagram showing a state in which the yoke 100 is viewed from the A direction of FIG. FIG. 4 is a view showing an example of a cross section of the first yoke portion 110 (a cross-sectional view of the first yoke portion 110 when cut at the portion I-I of FIG. 1).

第１ヨーク部１１０は、形状および板厚が同一の複数の軟磁性体板１１１を用いて構成される（図３および図４では、表記の都合上、１つの軟磁性体板にのみ符号１１１を付している）。また、第１ヨーク部１１０は、補強板１６１、１６２を有し、複数の軟磁性体板１１１を挟むように２枚の補強板１６１および１６２が配置される。補強板は非磁性を有する。これら複数の軟磁性体板と補強板の平面形状は長方形であり、その長手方向の両側に穴が１つずつ形成される。図４に示すように、これら複数の軟磁性体板は、当該軟磁性体板の板厚と略同じ長さの間隔を有して板面同士が相互に対向するように配置される。このようにして複数の軟磁性体板と補強板が配置されると、当該軟磁性体板と補強板に形成されている穴により、当該軟磁性体板と補強板の長手方向の両側に、当該軟磁性体板と補強板の板厚方向に貫通する貫通穴が形成される。補強板１６１および１６２は、後述するように、ボルトで押し付ける際に変形しない強度を有する。補強板１６１および１６２は、例えば、オーステナイトステンレスやチタンを用いて構成される。 The first yoke portion 110 is configured by using a plurality of soft magnetic material plates 111 having the same shape and thickness (in FIGS. 3 and 4, for convenience of notation, reference numeral 111 is provided only for one soft magnetic material plate. Is attached). Further, the first yoke portion 110 has reinforcing plates 161 and 162, and two reinforcing plates 161 and 162 are arranged so as to sandwich the plurality of soft magnetic material plates 111. The reinforcing plate has non-magnetism. The planar shape of the plurality of soft magnetic plate and the reinforcing plate is rectangular, and one hole is formed on each side in the longitudinal direction thereof. As shown in FIG. 4, these plurality of soft magnetic material plates are arranged so that the plate surfaces face each other with an interval of substantially the same length as the plate thickness of the soft magnetic material plate. When a plurality of soft magnetic material plates and reinforcing plates are arranged in this way, the holes formed in the soft magnetic material plate and the reinforcing plate allow the soft magnetic material plate and the reinforcing plate to be placed on both sides in the longitudinal direction. Through holes are formed through the soft magnetic material plate and the reinforcing plate in the plate thickness direction. The reinforcing plates 161 and 162 have a strength that does not deform when pressed with bolts, as will be described later. Reinforcing plates 161 and 162 are constructed using, for example, austenitic stainless steel or titanium.

第２ヨーク部１２０は、形状および板厚が同一の複数の第１軟磁性体板１２１と、形状および板厚が同一の複数の第２軟磁性体板１２２とを有する（図３では、表記の都合上、１つの第１軟磁性体板、第２軟磁性体板にのみ符号１２１、１２２を付している）。第１軟磁性体板１２１の平面形状は正方形である。第２軟磁性体板１２２の平面形状は長方形である。第２軟磁性体板１２２の板面の短辺の長さと第１軟磁性体板１２１の板面の一辺の長さは略同じである。第２ヨーク部１２０を構成する第１軟磁性体板１２１および第２軟磁性体板１２２の板厚と、第１ヨーク部１１０を構成する軟磁性体板１１１の板厚は、略同じである。図３に示すように、第２ヨーク部１２０は、第１軟磁性体板１２１の板面の一辺と、第２軟磁性体板１２２の板面の短辺とが重なり、且つ、第１軟磁性体板１２１および第２軟磁性体板１２２の板厚方向（Ｘ軸方向）の両端に第２軟磁性体板１２２が配置されるように、第１軟磁性体板１２１と第２軟磁性体板１２２とが交互に配置された状態で一体にされることにより構成される。図４に示すように、第２ヨーク部１２０の第２軟磁性体板１２２の数は、第１ヨーク部１１０の軟磁性体板１１１の間に形成される隙間の数と同数である。 The second yoke portion 120 has a plurality of first soft magnetic material plates 121 having the same shape and plate thickness, and a plurality of second soft magnetic material plates 122 having the same shape and plate thickness (notation in FIG. 3). For the convenience of the above, only one first soft magnetic material plate and the second soft magnetic material plate are designated by reference numerals 121 and 122). The planar shape of the first soft magnetic plate 121 is square. The planar shape of the second soft magnetic plate 122 is rectangular. The length of the short side of the plate surface of the second soft magnetic material plate 122 and the length of one side of the plate surface of the first soft magnetic material plate 121 are substantially the same. The thickness of the first soft magnetic plate 121 and the second soft magnetic plate 122 constituting the second yoke portion 120 and the thickness of the soft magnetic plate 111 forming the first yoke portion 110 are substantially the same. .. As shown in FIG. 3, in the second yoke portion 120, one side of the plate surface of the first soft magnetic material plate 121 and the short side of the plate surface of the second soft magnetic material plate 122 overlap each other, and the first soft magnetic material plate 122 is formed. The first soft magnetic material plate 121 and the second soft magnetic material plate 121 and the second soft magnetic material plate 122 are arranged so that the second soft magnetic material plate 122 is arranged at both ends of the magnetic material plate 121 and the second soft magnetic material plate 122 in the plate thickness direction (X-axis direction). It is configured by being integrated with the body plate 122 in a state of being alternately arranged. As shown in FIG. 4, the number of the second soft magnetic plate 122 of the second yoke portion 120 is the same as the number of gaps formed between the soft magnetic plate 111 of the first yoke portion 110.

図３に示すように、第２ヨーク部１２０の長手方向（Ｚ軸方向）の一端面は平坦な磁極面（試験片Ｓと接触される領域）になる。図３に示す例では、第２軟磁性体板１２２の長手方向（Ｚ軸方向）の両端のうち、第１軟磁性体板１２１が配置される側の端の領域が、平坦な磁極面になる。一方、第２ヨーク部１２０の長手方向の他端面は凹凸面になる。図３に示す例では、第２軟磁性体板１２２の長手方向の両端のうち、第１軟磁性体板１２１が配置されていない側の領域は、凹凸が繰り返された形状（いわゆる櫛歯状）になる。 As shown in FIG. 3, one end surface of the second yoke portion 120 in the longitudinal direction (Z-axis direction) becomes a flat magnetic pole surface (region in contact with the test piece S). In the example shown in FIG. 3, of both ends of the second soft magnetic plate 122 in the longitudinal direction (Z-axis direction), the region of the end on the side where the first soft magnetic plate 121 is arranged is a flat magnetic pole surface. Become. On the other hand, the other end surface of the second yoke portion 120 in the longitudinal direction becomes an uneven surface. In the example shown in FIG. 3, of both ends in the longitudinal direction of the second soft magnetic plate 122, the region on the side where the first soft magnetic plate 121 is not arranged has a shape in which irregularities are repeated (so-called comb-teeth shape). )become.

尚、図１と図３における第２ヨーク部１２０の位置の関係を明示するために、図１および図３において、第２ヨーク部１２０の各位置１２０ａ、１２０ｂ、１２０ｃ、１２０ｄを示している。
第３ヨーク部１３０は、第２ヨーク部１２０と同じ構成を有する。
第１取付部１４０は、ボルト、ナット、ワッシャ等を有する。第２取付部１５０は、第１取付部１４０と同じ構成を有する。 In order to clarify the relationship between the positions of the second yoke portion 120 in FIGS. 1 and 3, the positions 120a, 120b, 120c, and 120d of the second yoke portion 120 are shown in FIGS. 1 and 3.
The third yoke portion 130 has the same configuration as the second yoke portion 120.
The first mounting portion 140 has bolts, nuts, washers, and the like. The second mounting portion 150 has the same configuration as the first mounting portion 140.

図１および図４に示すように、第１ヨーク部１１０を構成する軟磁性体板１１１と補強板１６１および１６２の長手方向の一側（Ｙ軸の負の方向側）において当該軟磁性体板１１１と補強板１６１および１６２の板厚方向（Ｘ軸方向）に貫通する貫通穴に第１取付部１４０のボルトが挿入される。同様に、第１ヨーク部１１０を構成する軟磁性体板１１１と補強板１６１および１６２の長手方向の他側（Ｙ軸の正の方向側）において当該軟磁性体板１１１の板厚方向に貫通する貫通穴に第２取付部１５０のボルトが挿入される。ボルトの先端側にはナットが取り付けられる。ボルトとナットは、非磁性を有する。このとき、例えば、ボルトと軟磁性体板１１１とが接触しないようにし、ボルトの頭部および軟磁性体板１１１の間と、ナットおよび軟磁性体板１１１の間に、それぞれ絶縁ワッシャと絶縁スリーブを配置することにより、ボルトおよびナットと軟磁性体板１１１とが絶縁された状態にする。尚、第１取付部１４０を構成するボルトおよびナット等を、非磁性且つ絶縁性を有する材料で構成してもよい。 As shown in FIGS. 1 and 4, the soft magnetic plate 111 and the reinforcing plates 161 and 162 constituting the first yoke portion 110 are on one side in the longitudinal direction (the negative direction side of the Y axis). The bolt of the first mounting portion 140 is inserted into the through hole penetrating the 111 and the reinforcing plates 161 and 162 in the plate thickness direction (X-axis direction). Similarly, the soft magnetic plate 111 constituting the first yoke portion 110 and the reinforcing plates 161 and 162 penetrate in the thickness direction of the soft magnetic plate 111 on the other side (positive direction side of the Y axis) in the longitudinal direction. The bolt of the second mounting portion 150 is inserted into the through hole. A nut is attached to the tip side of the bolt. Bolts and nuts are non-magnetic. At this time, for example, the bolt and the soft magnetic plate 111 are prevented from coming into contact with each other, and an insulating washer and an insulating sleeve are provided between the head of the bolt and the soft magnetic plate 111 and between the nut and the soft magnetic plate 111, respectively. By arranging the bolts and nuts, the soft magnetic plate 111 is in an insulated state. The bolts, nuts, and the like constituting the first mounting portion 140 may be made of a non-magnetic and insulating material.

ヨーク１００を構成する際には、まず、図１および図３に示すように、第１ヨーク部１１０の隙間に、第２ヨーク部１２０および第３ヨーク部１３０の、第２軟磁性体板１２２の第１軟磁性体板１２１よりも突き出ている領域（前述した櫛歯状の凸部）を挿入する。そして、第２ヨーク部１２０および第３ヨーク部１３０を第１ヨーク部１１０に挿入した状態で、第１ヨーク部１１０を構成する軟磁性体板１１１の板面に対して、第２ヨーク部１２０および第３ヨーク部１３０を構成する軟磁性体板１２１、１２２の板面を摺動させて、第２ヨーク部１２０および第３ヨーク部１３０の位置および向きを変える。 When forming the yoke 100, first, as shown in FIGS. 1 and 3, in the gap of the first yoke portion 110, the second soft magnetic material plate 122 of the second yoke portion 120 and the third yoke portion 130 is formed. A region protruding from the first soft magnetic plate 121 (the above-mentioned comb-shaped convex portion) is inserted. Then, with the second yoke portion 120 and the third yoke portion 130 inserted into the first yoke portion 110, the second yoke portion 120 with respect to the plate surface of the soft magnetic material plate 111 constituting the first yoke portion 110. The positions and orientations of the second yoke portion 120 and the third yoke portion 130 are changed by sliding the plate surfaces of the soft magnetic plates 121 and 122 constituting the third yoke portion 130.

このようにして第２ヨーク部１２０および第３ヨーク部１３０の位置および向きを変えることにより、第２ヨーク部１２０の磁極面、第３ヨーク部１３０の磁極面が、それぞれ、試験片Ｓの長手方向の一端、他端の領域における板面と合わさると、第２ヨーク部１２０および第３ヨーク部１３０をその状態に保持して、第１取付部１４０および第２取付部１５０により、第２ヨーク部１２０および第３ヨーク部１３０が挿入された第１ヨーク部１１０を締め付ける。これにより、第１ヨーク部１１０に対し第２ヨーク部１２０および第３ヨーク部１３０が固定される。 By changing the positions and directions of the second yoke portion 120 and the third yoke portion 130 in this way, the magnetic pole surfaces of the second yoke portion 120 and the magnetic pole surfaces of the third yoke portion 130 are respectively the length of the test piece S. When combined with the plate surface in the regions of one end and the other end in the direction, the second yoke portion 120 and the third yoke portion 130 are held in that state, and the first mounting portion 140 and the second mounting portion 150 hold the second yoke portion 120 and the second yoke portion 130. The first yoke portion 110 into which the portion 120 and the third yoke portion 130 are inserted is tightened. As a result, the second yoke portion 120 and the third yoke portion 130 are fixed to the first yoke portion 110.

尚、図１では、第１ヨーク部１１０を構成する軟磁性体板１１１の長手方向（Ｙ軸方向）の両側の合計２箇所に第１取付部１４０および第２取付部１５０を取り付けることにより、第１ヨーク部１１０に対し第２ヨーク部１２０および第３ヨーク部１３０が固定されるようにする場合を例に挙げて示した。しかしながら、固定部の位置および数は、このようなものに限定されない。例えば、第１ヨーク部１１０を構成する軟磁性体板１１１の長手方向（Ｙ軸方向）の中央の位置にも固定部が取り付けられるようにして、第１ヨーク部１１０に対し第２ヨーク部１２０および第３ヨーク部１３０をより確実に固定することができるようにしてもよい。また、第１ヨーク部１１０に対し第２ヨーク部１２０および第３ヨーク部１３０を固定することができれば、必ずしもボルトおよびナットを用いる必要はない。例えば、第１ヨーク部１１０を構成する複数の軟磁性体板１１１のうち、当該軟磁性体板１１１の板厚方向（Ｘ軸方向）の両端に位置する軟磁性体板１１１の板面を、非磁性且つ絶縁性を有する板状の部材を使って押し付けるようにしてもよい。 In FIG. 1, the first mounting portion 140 and the second mounting portion 150 are mounted at a total of two locations on both sides of the soft magnetic plate 111 constituting the first yoke portion 110 in the longitudinal direction (Y-axis direction). An example is shown in which the second yoke portion 120 and the third yoke portion 130 are fixed to the first yoke portion 110. However, the position and number of fixed portions are not limited to such. For example, the second yoke portion 120 is attached to the first yoke portion 110 so that the fixed portion is also attached to the central position in the longitudinal direction (Y-axis direction) of the soft magnetic plate 111 constituting the first yoke portion 110. And the third yoke portion 130 may be more reliably fixed. Further, if the second yoke portion 120 and the third yoke portion 130 can be fixed to the first yoke portion 110, it is not always necessary to use bolts and nuts. For example, among the plurality of soft magnetic material plates 111 constituting the first yoke portion 110, the plate surfaces of the soft magnetic material plates 111 located at both ends of the soft magnetic material plate 111 in the plate thickness direction (X-axis direction) can be set. A non-magnetic and insulating plate-shaped member may be used for pressing.

また、ここでは、１枚おきに隙間を有するように（隙間の両側にある軟磁性体板１１１の数が１となるように）板面が相互に対向する状態で複数の軟磁性体板１１１を配置することにより第１ヨーク部１１０を構成する場合を例に挙げて説明した。しかしながら、必ずしも隙間は１枚おきに形成する必要はなく、複数枚おきに形成してもよいし、隙間の両側にある軟磁性体板１１１の数を場所により異ならせてもよい。また、隙間は、複数枚の軟磁性体板の板厚の和と略同じ長さとしてもよい。この場合、第２ヨーク部１２０および第３ヨーク部１３０の前述した櫛歯状の１つの凸部を構成する第２軟磁性体板の板厚の和が、第１ヨーク部１１０に形成される隙間の長さと略同じになるようにする。 Further, here, a plurality of soft magnetic material plates 111 are provided so that every other plate has a gap (so that the number of soft magnetic material plates 111 on both sides of the gap is 1) and the plate surfaces face each other. The case where the first yoke portion 110 is formed by arranging the first yoke portion 110 has been described as an example. However, the gaps do not necessarily have to be formed every other sheet, and may be formed every other sheet, or the number of soft magnetic plate 111s on both sides of the gap may be different depending on the location. Further, the gap may have a length substantially the same as the sum of the plate thicknesses of the plurality of soft magnetic material plates. In this case, the sum of the thicknesses of the second soft magnetic plate forming the above-mentioned one comb-shaped convex portion of the second yoke portion 120 and the third yoke portion 130 is formed in the first yoke portion 110. Make it approximately the same as the length of the gap.

図５は、第２ヨーク部１２０および第３ヨーク部１３０の配置の第１の例を示す図である。図５（ａ）は、第１ヨーク部１１０と第２ヨーク部１２０とのなす角度θ１と、第１ヨーク部１１０と第３ヨーク部１３０とのなす角度θ２とが同じである場合の第１ヨーク部１１０における第２ヨーク部１２０および第３ヨーク部１３０の配置を示す。図５（ｂ）は、第１ヨーク部１１０と第２ヨーク部１２０とのなす角度θ１と、第１ヨーク部１１０と第３ヨーク部１３０とのなす角度θ２とが異なる場合の第１ヨーク部１１０における第２ヨーク部１２０および第３ヨーク部１３０の配置を示す。 FIG. 5 is a diagram showing a first example of the arrangement of the second yoke portion 120 and the third yoke portion 130. FIG. 5A shows the first case where the angle θ1 formed by the first yoke portion 110 and the second yoke portion 120 and the angle θ2 formed by the first yoke portion 110 and the third yoke portion 130 are the same. The arrangement of the second yoke portion 120 and the third yoke portion 130 in the yoke portion 110 is shown. FIG. 5B shows a first yoke portion when the angle θ1 formed by the first yoke portion 110 and the second yoke portion 120 and the angle θ2 formed by the first yoke portion 110 and the third yoke portion 130 are different. The arrangement of the second yoke portion 120 and the third yoke portion 130 in 110 is shown.

図５（ｂ）に示す状態は、図５（ａ）に示す状態に対し、第２ヨーク部１２０を第３ヨーク部１３０から遠ざかる方向に回動させた状態である。このように、第２ヨーク部１２０の磁極面と第３ヨーク部１３０の磁極面とがなす角度θｔを変えることができる。 The state shown in FIG. 5B is a state in which the second yoke portion 120 is rotated in a direction away from the third yoke portion 130 with respect to the state shown in FIG. 5A. In this way, the angle θt formed by the magnetic pole surface of the second yoke portion 120 and the magnetic pole surface of the third yoke portion 130 can be changed.

図６は、第２ヨーク部１２０および第３ヨーク部１３０の配置の第２の例を示す図である。図６（ａ）は、第１ヨーク部１１０と第２ヨーク部１２０との距離が相対的に遠い場合の第１ヨーク部１１０における第２ヨーク部１２０および第３ヨーク部１３０の配置を示す。図６（ｂ）は、第１ヨーク部１１０と第２ヨーク部１２０との距離が相対的に近い場合の第１ヨーク部１１０における第２ヨーク部１２０および第３ヨーク部１３０の配置を示す。 FIG. 6 is a diagram showing a second example of the arrangement of the second yoke portion 120 and the third yoke portion 130. FIG. 6A shows the arrangement of the second yoke portion 120 and the third yoke portion 130 in the first yoke portion 110 when the distance between the first yoke portion 110 and the second yoke portion 120 is relatively long. FIG. 6B shows the arrangement of the second yoke portion 120 and the third yoke portion 130 in the first yoke portion 110 when the distance between the first yoke portion 110 and the second yoke portion 120 is relatively short.

図６（ａ）および図６（ｂ）に示すように、第２ヨーク部１２０の磁極面と第３ヨーク部１３０の磁極面とがなす角度θｔを変えずに、第２ヨーク部１２０の磁極面と第３ヨーク部１３０の磁極面との距離を変えることができる。
この他、例えば、図５（ａ）の状態に対し、第２ヨーク部１２０を第３ヨーク部１３０から遠ざかる方向に回動させると共に、第３ヨーク部１３０を第２ヨーク部１２０から遠ざかる方向に回動させることもできる。逆に、図５（ａ）の状態に対し、第２ヨーク部１２０を第３ヨーク部１３０に近づける方向に回動させると共に、第３ヨーク部１３０を第２ヨーク部１２０に近づける方向に回動させることもできる。また、図５（ａ）の状態に対し、第２ヨーク部１２０を第３ヨーク部１３０から遠ざかる方向に回動させると共に、第２ヨーク部１２０および第３ヨーク部１３０の少なくとも何れか一方を、第１ヨーク部１１０を構成する軟磁性体板の長手方向に移動させることもできる。 As shown in FIGS. 6A and 6B, the magnetic pole of the second yoke portion 120 does not change the angle θt formed by the magnetic pole surface of the second yoke portion 120 and the magnetic pole surface of the third yoke portion 130. The distance between the surface and the magnetic pole surface of the third yoke portion 130 can be changed.
In addition, for example, with respect to the state shown in FIG. 5A, the second yoke portion 120 is rotated in the direction away from the third yoke portion 130, and the third yoke portion 130 is rotated in the direction away from the second yoke portion 120. It can also be rotated. On the contrary, with respect to the state of FIG. 5A, the second yoke portion 120 is rotated in the direction closer to the third yoke portion 130, and the third yoke portion 130 is rotated in the direction closer to the second yoke portion 120. You can also let it. Further, with respect to the state of FIG. 5A, the second yoke portion 120 is rotated in a direction away from the third yoke portion 130, and at least one of the second yoke portion 120 and the third yoke portion 130 is moved. It is also possible to move the soft magnetic plate constituting the first yoke portion 110 in the longitudinal direction.

このように、第２ヨーク部１２０および第３ヨーク部１３０が第１ヨーク部１１０に挿入されている状態で、第２ヨーク部１２０および第３ヨーク部１３０の少なくとも何れか一方について、第１ヨーク部１１０を構成する軟磁性体板１１１の板面に沿う方向におおいて、平行移動および回動の少なくとも何れか一方を行うことができる。従って、試験片Ｓの長さおよび形状に合わせて、第２ヨーク部１２０および第３ヨーク部１３０の磁極面の位置および向きを調節することができる。 In this way, with the second yoke portion 120 and the third yoke portion 130 inserted into the first yoke portion 110, at least one of the second yoke portion 120 and the third yoke portion 130 has a first yoke. At least one of translation and rotation can be performed in the direction along the plate surface of the soft magnetic plate 111 constituting the portion 110. Therefore, the positions and orientations of the magnetic pole surfaces of the second yoke portion 120 and the third yoke portion 130 can be adjusted according to the length and shape of the test piece S.

次に、本実施形態の巻線枠２００、励磁コイル３００および磁束密度検出コイル４００について説明する。
図７は、巻線枠２００、励磁コイル３００および磁束密度検出コイル４００の構成の一例を示す図である。巻線枠２００、励磁コイル３００、磁束密度検出コイル４００、および試験片Ｓの、第３ヨーク部１３０側の領域の構成は、第２ヨーク部１２０側の領域の構成と同じであるので、図７では、巻線枠２００、励磁コイル３００、磁束密度検出コイル４００、および試験片Ｓの、第２ヨーク部１２０側の領域のみを示す。また、図７では、第２ヨーク部１２０の磁極面付近の領域も示す。図７は、これらの領域を、励磁コイル３００および磁束密度検出コイル４００のコイル軸を通るように、試験片Ｓの板厚方向に沿って切った場合の断面を示す。図８は、巻線枠２００の構成の一例を示す図である。具体的に図８（ａ）は、図７のII−IIの部分で切った場合の巻線枠２００の断面図であり、図８（ｂ）は、図７のIII−IIIの部分で切った場合の巻線枠２００の断面図である。図９は、励磁コイル３００および磁束密度検出コイル４００の巻き方の一例を示す図である。以下、図７〜図９を参照しながら、本実施形態の巻線枠２００、励磁コイル３００および磁束密度検出コイル４００について説明する。 Next, the winding frame 200, the exciting coil 300, and the magnetic flux density detection coil 400 of the present embodiment will be described.
FIG. 7 is a diagram showing an example of the configuration of the winding frame 200, the exciting coil 300, and the magnetic flux density detection coil 400. The configuration of the region on the third yoke portion 130 side of the winding frame 200, the exciting coil 300, the magnetic flux density detection coil 400, and the test piece S is the same as the configuration of the region on the second yoke portion 120 side. In No. 7, only the region of the winding frame 200, the exciting coil 300, the magnetic flux density detection coil 400, and the test piece S on the second yoke portion 120 side is shown. Further, FIG. 7 also shows a region near the magnetic pole surface of the second yoke portion 120. FIG. 7 shows a cross section when these regions are cut along the plate thickness direction of the test piece S so as to pass through the coil shafts of the exciting coil 300 and the magnetic flux density detecting coil 400. FIG. 8 is a diagram showing an example of the configuration of the winding frame 200. Specifically, FIG. 8A is a cross-sectional view of the winding frame 200 when cut at the portion II-II of FIG. 7, and FIG. 8B is a cross-sectional view taken at the portion III-III of FIG. It is sectional drawing of the winding frame 200 in the case of. FIG. 9 is a diagram showing an example of how to wind the exciting coil 300 and the magnetic flux density detecting coil 400. Hereinafter, the winding frame 200, the exciting coil 300, and the magnetic flux density detection coil 400 of the present embodiment will be described with reference to FIGS. 7 to 9.

巻線枠２００は、巻線枠本体部２１０および固定部２２０を有する。
巻線枠本体部２１０は、可撓性を有する。本実施形態では、巻線枠本体部２１０を蛇腹状として、巻線枠本体部２１０が可撓性を有するようにしている。また、蛇腹の凹部および凸部はそれぞれ螺旋状になっている。巻線枠本体部２１０は、例えば、ポリ塩化ビニル樹脂を用いて構成される。この場合、例えば、蛇腹の凸部の領域に硬質のポリ塩化ビニル樹脂を用い、その他の領域に軟質のポリ塩化ビニル樹脂を用いることにより、蛇腹の凸部が変形しにくくなるようにすることができる。また、例えば、巻線枠本体部２１０（蛇腹）の内部に、螺旋に沿って非磁性の針金を埋め込むことにより、巻線枠本体部２１０が曲げられた状態になると巻線枠本体部２１０がその状態を保持するようにすることができる。 The winding frame 200 has a winding frame main body 210 and a fixing 220.
The winding frame main body 210 has flexibility. In the present embodiment, the winding frame main body 210 is formed in a bellows shape so that the winding frame main body 210 has flexibility. Further, the concave portion and the convex portion of the bellows are spiral, respectively. The winding frame main body 210 is configured by using, for example, a polyvinyl chloride resin. In this case, for example, a hard polyvinyl chloride resin may be used in the convex portion of the bellows, and a soft polyvinyl chloride resin may be used in the other regions to prevent the convex portion of the bellows from being deformed. it can. Further, for example, by embedding a non-magnetic wire along the spiral inside the winding frame main body 210 (bellows), the winding frame main body 210 is bent when the winding frame main body 210 is bent. The state can be maintained.

励磁コイル３００および磁束密度検出コイル４００は、可撓性の絶縁被覆で覆われた撚線の電線を用いて構成される。磁束密度検出コイル４００は、巻線枠本体部２１０の蛇腹の凹部の螺旋状の領域に沿って配置される。これにより磁束密度検出コイル４００は、図９に示すように、巻線枠本体部２１０に螺旋状に巻き回される。励磁コイル３００は、磁束密度検出コイル４００よりも巻線枠本体部２１０の外周側において、巻線枠本体部２１０の蛇腹の凹部の螺旋状の領域に沿って配置される。これにより励磁コイル３００も磁束密度検出コイル４００と同様に、巻線枠本体部２１０に螺旋状に巻き回される。 The exciting coil 300 and the magnetic flux density detecting coil 400 are configured by using a stranded electric wire covered with a flexible insulating coating. The magnetic flux density detection coil 400 is arranged along the spiral region of the bellows recess of the winding frame main body 210. As a result, the magnetic flux density detection coil 400 is spirally wound around the winding frame main body 210 as shown in FIG. The exciting coil 300 is arranged on the outer peripheral side of the winding frame main body 210 with respect to the magnetic flux density detection coil 400 along the spiral region of the bellows recess of the winding frame main body 210. As a result, the exciting coil 300 is spirally wound around the winding frame main body 210 in the same manner as the magnetic flux density detection coil 400.

巻線枠本体部２１０には、その長手方向（励磁コイル３００も磁束密度検出コイル４００のコイル軸の方向）において貫通する中空領域が形成される。図８（ａ）に示すように、巻線枠本体部２１０をその長手方向に垂直な方向に沿って切った場合の断面において、巻線枠本体部２１０の中空領域は、長方形の領域となる。この長方形の長辺が試験片Ｓの板面と対向し、短辺が試験片Ｓの板厚部分と対向するようにする。また、この長方形の長辺の長さは、試験片Ｓの板面の短辺の長さ（幅）として想定される長さよりも長い範囲で可及的に短いのが好ましく、短辺の長さは、試験片Ｓの板厚として想定される長さよりも長い範囲で可及的に短いのが好ましい。試験片Ｓと磁束密度検出コイル４００との間の領域の面積を小さくすることができるので、磁束密度検出コイル４００の両端に発生する誘導起電力に、この領域を貫く磁束に基づく成分が含まれることを抑制することができるからである。 A hollow region is formed in the winding frame main body 210 in the longitudinal direction thereof (the exciting coil 300 is also in the direction of the coil shaft of the magnetic flux density detection coil 400). As shown in FIG. 8A, in the cross section when the winding frame main body 210 is cut along the direction perpendicular to the longitudinal direction thereof, the hollow region of the winding frame main body 210 is a rectangular region. .. The long side of this rectangle faces the plate surface of the test piece S, and the short side faces the plate thickness portion of the test piece S. Further, the length of the long side of this rectangle is preferably as short as possible in a range longer than the length (width) of the short side of the plate surface of the test piece S, and the length of the short side. It is preferable that the length is as short as possible in a range longer than the length assumed as the plate thickness of the test piece S. Since the area of the region between the test piece S and the magnetic flux density detection coil 400 can be reduced, the induced electromotive force generated at both ends of the magnetic flux density detection coil 400 includes a component based on the magnetic flux penetrating this region. This is because it can be suppressed.

巻線枠本体部２１０の長手方向の端部には固定部２２０が取り付けられる。固定部２２０は、可撓性を有しない。固定部２２０は、固定部本体２２１、第３取付部２２２、および第４取付部２２３を有する。固定部本体２２１は、非磁性且つ絶縁性を有し、且つ、後述するようにして試験片Ｓを押さえ付けても変形しない強度を有する材料を用いて構成される。例えば、固定部本体２２１は、ガラスエポキシ樹脂やフェノール樹脂を用いて構成される。図７および図８（ａ）に示すように、固定部本体２２１は、巻線枠本体部２１０の中空領域と連通する中空領域を有する。この中空領域は、巻線枠本体部２１０の長手方向に沿う方向において、固定部本体２２１を貫くように形成される。また、巻線枠本体部２１０の長手方向に沿う方向に垂直に切った場合の断面において、巻線枠本体部２１０の中空領域と固定部本体２２１の中空領域は、略同じ長方形の領域となる。これら長方形の領域が合うように、固定部本体２２１は、巻線枠本体部２１０の長手方向の端部に着脱不能に取り付けられる。 A fixing portion 220 is attached to the end portion of the winding frame main body portion 210 in the longitudinal direction. The fixing portion 220 does not have flexibility. The fixing portion 220 has a fixing portion main body 221, a third mounting portion 222, and a fourth mounting portion 223. The fixed portion main body 221 is made of a material that is non-magnetic, has insulating properties, and has strength that does not deform even when the test piece S is pressed down as described later. For example, the fixing portion main body 221 is configured by using a glass epoxy resin or a phenol resin. As shown in FIGS. 7 and 8 (a), the fixed portion main body 221 has a hollow region communicating with the hollow region of the winding frame main body 210. This hollow region is formed so as to penetrate the fixed portion main body 221 in the direction along the longitudinal direction of the winding frame main body portion 210. Further, in the cross section when the winding frame main body 210 is cut vertically along the longitudinal direction, the hollow region of the winding frame main body 210 and the hollow region of the fixed portion main body 221 are substantially the same rectangular region. .. The fixing portion main body 221 is non-detachably attached to the longitudinal end of the winding frame main body 210 so that these rectangular regions fit together.

図７および図８（ａ）に示すように、固定部本体２２１には、その中空領域に対して垂直な方向に２つのねじ穴が形成される。これら２つのねじ穴は、試験片Ｓの板面を介して相互に対向する位置に配置される。
第３取付部２２２および第４取付部２２３は、同じ構成を有する。第３取付部２２２および第４取付部２２３は、ねじと板とを有する。固定部２２０のねじ穴に挿入された状態のねじの先端に、板が取り付けられる。この板の板面は、試験片Ｓの板面と略平行な状態になるようにする。ねじと板は、一体となっており、非磁性且つ絶縁性を有し、後述するようにして試験片Ｓを押さえ付けても変形しない強度を有する材料を用いて構成される。第３取付部２２２および第４取付部２２３は、例えば、ガラスエポキシ樹脂やフェノール樹脂を用いて構成される。 As shown in FIGS. 7 and 8 (a), two screw holes are formed in the fixing portion main body 221 in a direction perpendicular to the hollow region thereof. These two screw holes are arranged at positions facing each other via the plate surface of the test piece S.
The third mounting portion 222 and the fourth mounting portion 223 have the same configuration. The third mounting portion 222 and the fourth mounting portion 223 have a screw and a plate. A plate is attached to the tip of the screw inserted into the screw hole of the fixing portion 220. The plate surface of this plate is set to be substantially parallel to the plate surface of the test piece S. The screw and the plate are integrated, and are made of a material that is non-magnetic, has insulating properties, and has strength that does not deform even when the test piece S is pressed down as described later. The third mounting portion 222 and the fourth mounting portion 223 are configured by using, for example, a glass epoxy resin or a phenol resin.

図７および図８（ａ）に示すように、巻線枠本体部２１０および固定部２２０の中空領域に試験片Ｓを挿入し、第２ヨーク部１２０の磁極面と試験片Ｓの板面とを合わせた後、試験片Ｓを間に挟んだ状態で第３取付部２２２および第４取付部２２３の板で試験片Ｓの板面をその上下から押さえ付けるように第３取付部２２２および第４取付部２２３のねじを回すことにより、巻線枠２００に試験片Ｓ（の一端側の領域）が取り付けられる。 As shown in FIGS. 7 and 8A, the test piece S is inserted into the hollow region of the winding frame main body 210 and the fixing 220, and the magnetic pole surface of the second yoke portion 120 and the plate surface of the test piece S are formed. The third mounting portion 222 and the third mounting portion 222 and the third mounting portion 222 so as to press the plate surface of the test piece S from above and below with the plates of the third mounting portion 222 and the fourth mounting portion 223 with the test piece S sandwiched between them. 4 The test piece S (the region on one end side) is attached to the winding frame 200 by turning the screw of the attachment portion 223.

巻線枠本体部２１０の他端にも、固定部２２０、第３取付部２２２および第４取付部２２３と同じ構成の固定部２２０、第３取付部２２２および第４取付部２２３が取り付けられる。第３ヨーク部１３０の磁極面と試験片Ｓの板面とを合わせた後、試験片Ｓを間に挟んだ状態で第３取付部２２２および第４取付部２２３の板で試験片Ｓの板面をその上下から押さえ付けるように第３取付部２２２および第４取付部２２３のねじを回すことにより、巻線枠２００に試験片Ｓ（の他端側の領域）が取り付けられる。 A fixing portion 220, a third mounting portion 222, and a fourth mounting portion 223 having the same configuration as the fixing portion 220, the third mounting portion 222, and the fourth mounting portion 223 are also mounted on the other end of the winding frame main body portion 210. After aligning the magnetic pole surface of the third yoke portion 130 with the plate surface of the test piece S, the plate of the test piece S is formed by the plates of the third mounting portion 222 and the fourth mounting portion 223 with the test piece S sandwiched between them. The test piece S (the region on the other end side of the winding frame 200) is attached to the winding frame 200 by turning the screws of the third attachment portion 222 and the fourth attachment portion 223 so as to press the surfaces from above and below.

試験片Ｓを弾性変形させる場合には、試験片Ｓを弾性変形させずに巻線枠本体部２１０および固定部２２０の中空領域に挿入した後、試験片Ｓを弾性変形させ、その状態で、第３取付部２２２および第４取付部２２３を用いて巻線枠本体部２１０に試験片Ｓを取り付けることができる。一方、塑性変形された試験片Ｓの磁気特性を測定する場合には、塑性変形された試験片Ｓの形状に合わせて巻線枠本体部２１０を曲げることにより試験片Ｓを巻線枠本体部２１０および固定部２２０の中空領域に挿入することができる。 When the test piece S is elastically deformed, the test piece S is inserted into the hollow region of the winding frame main body 210 and the fixed portion 220 without being elastically deformed, and then the test piece S is elastically deformed. The test piece S can be attached to the winding frame main body 210 by using the third attachment portion 222 and the fourth attachment portion 223. On the other hand, when measuring the magnetic characteristics of the plastically deformed test piece S, the test piece S is moved to the winding frame main body by bending the winding frame main body 210 according to the shape of the plastically deformed test piece S. It can be inserted into the hollow region of 210 and the fixed portion 220.

以上のようにして試験片Ｓが巻線枠本体部２１０に取り付けられた後、第２ヨーク部１２０、第３ヨーク部１３０の磁極面と試験片Ｓの板面とが合うように、第２ヨーク部１２０および第３ヨーク部１３０の少なくとも何れか一方を動かす。そして、第２ヨーク部１２０、第３ヨーク部１３０の磁極面と試験片Ｓの板面とが合った状態で、励磁コイル３００に励磁電流を流し、磁束密度検出コイル４００の両端に発生する誘導起電力を測定する。この誘導起電力に基づいて、試験片Ｓの内部の磁束密度を導出する。 After the test piece S is attached to the winding frame main body 210 as described above, the second yoke portion 120 and the third yoke portion 130 are aligned with each other so that the plate surface of the test piece S is aligned with the second yoke portion 120 and the third yoke portion 130. Move at least one of the yoke portion 120 and the third yoke portion 130. Then, an electromotive current is passed through the exciting coil 300 in a state where the magnetic pole surfaces of the second yoke portion 120 and the third yoke portion 130 and the plate surface of the test piece S are aligned with each other, and the induction generated at both ends of the magnetic flux density detection coil 400 is induced. Measure the electromotive force. Based on this induced electromotive force, the magnetic flux density inside the test piece S is derived.

尚、第２ヨーク部１２０および第３ヨーク部１３０の磁極面と、試験片Ｓの板面とを合わせて、第２ヨーク部１２０および第３ヨーク部１３０の位置決めをした後に、前述したようにして巻線枠本体部２１０に試験片Ｓを挿入し、巻線枠２００に試験片Ｓを取り付けてもよい。 After positioning the second yoke portion 120 and the third yoke portion 130 by aligning the magnetic pole surfaces of the second yoke portion 120 and the third yoke portion 130 with the plate surface of the test piece S, as described above. The test piece S may be inserted into the winding frame main body 210, and the test piece S may be attached to the winding frame 200.

巻線枠本体部２１０および固定部２２０は、巻線枠本体部２１０および固定部２２０が動かないように不図示の保持部により保持される。また、第２ヨーク部１２０、第３ヨーク部１３０の磁極面と試験片Ｓの板面とが合わさった状態がより確実に継続されるように、試験片Ｓを間に挟んだ状態で不図示の押付部により第２ヨーク部１２０の磁極面、第３のヨーク部１３０の磁極面をそれぞれ押さえ付けるようにするのが好ましい。この押付部は、非磁性且つ絶縁性を有する材料を用いて構成される。また、試験片Ｓの板面の領域のうち、第２ヨーク部１２０の磁極面と接触する領域の反対側の領域と、第３ヨーク部１２０の磁極面と接触する領域の反対側の領域を磁極面とするヨーク部をヨーク部１１０が有するようにし、試験片Ｓの板面をヨーク部の磁極面で上下から挟み込むようにしてもよい。このようにする場合も、各ヨーク部の磁極面を、試験片Ｓの板面に密着させるようにするのが好ましい。 The winding frame main body 210 and the fixing portion 220 are held by a holding portion (not shown) so that the winding frame main body 210 and the fixing portion 220 do not move. Further, the test piece S is sandwiched between them so that the magnetic pole surfaces of the second yoke portion 120 and the third yoke portion 130 and the plate surface of the test piece S can be more reliably continued. It is preferable that the magnetic pole surface of the second yoke portion 120 and the magnetic pole surface of the third yoke portion 130 are pressed by the pressing portion of the above. This pressing portion is constructed by using a non-magnetic and insulating material. Further, among the plate surface regions of the test piece S, the region opposite to the region in contact with the magnetic pole surface of the second yoke portion 120 and the region opposite to the region in contact with the magnetic pole surface of the third yoke portion 120. The yoke portion 110 may have a yoke portion as the magnetic pole surface, and the plate surface of the test piece S may be sandwiched between the magnetic pole surfaces of the yoke portion from above and below. Even in this case, it is preferable that the magnetic pole surface of each yoke portion is brought into close contact with the plate surface of the test piece S.

以上のように本実施形態では、可撓性を有する巻線枠２００の外周面に、励磁コイル３００が外側、磁束密度検出コイル４００が内側になるように励磁コイル３００および磁束密度検出コイル４００を螺旋状に配置する。ヨーク１００は、試験片Ｓと接触する磁極面の位置と向きとを可変にすることができる。巻線枠２００は、その一端と他端とを貫くように形成された中空領域を有する。この中空領域に挿入された試験片Ｓの形状に合わせて巻線枠２００を変形し、試験片Ｓの一端側の板面の領域と他端側の板面の領域とをヨーク１００の磁極面に合わせた状態とする。その状態で、励磁コイル３００に励磁電流を流し、磁束密度検出コイル４００の両端に発生する誘導起電力を測定する。従って、試験片Ｓの板面を曲げる場合であっても、１つの巻線枠２００に励磁コイル３００および磁束密度検出コイル４００を巻き回すことができる。従って、励磁コイル３００および磁束密度検出コイル４００における磁束の漏れを低減することができる。また、巻線枠本体部２１０第２ヨーク部１２０、および第３ヨーク部１３０により調整できる範囲内であれば、試験片Ｓの曲げ角度を自由に調整することができる。よって、弾性変形させた試験片や塑性変形された試験片の磁気特性を正確に測定することができる単板磁気特性試験器を提供することができる。 As described above, in the present embodiment, the exciting coil 300 and the magnetic flux density detecting coil 400 are mounted on the outer peripheral surface of the flexible winding frame 200 so that the exciting coil 300 is on the outside and the magnetic flux density detecting coil 400 is on the inside. Arrange in a spiral. The yoke 100 can change the position and orientation of the magnetic pole surface that comes into contact with the test piece S. The winding frame 200 has a hollow region formed so as to penetrate one end and the other end thereof. The winding frame 200 is deformed according to the shape of the test piece S inserted into the hollow region, and the region of the plate surface on one end side and the region of the plate surface on the other end side of the test piece S are the magnetic pole surfaces of the yoke 100. The state is adjusted to. In this state, an exciting current is passed through the exciting coil 300, and the induced electromotive force generated at both ends of the magnetic flux density detection coil 400 is measured. Therefore, even when the plate surface of the test piece S is bent, the exciting coil 300 and the magnetic flux density detecting coil 400 can be wound around one winding frame 200. Therefore, it is possible to reduce the leakage of magnetic flux in the exciting coil 300 and the magnetic flux density detecting coil 400. Further, the bending angle of the test piece S can be freely adjusted as long as it is within the range that can be adjusted by the winding frame main body portion 210, the second yoke portion 120, and the third yoke portion 130. Therefore, it is possible to provide a single-plate magnetic property tester capable of accurately measuring the magnetic properties of an elastically deformed test piece or a plastically deformed test piece.

本実施形態では、ヨーク１００が、相互に分離された３つのヨーク部（第１ヨーク部１１０、第２ヨーク部１２０、および第３ヨーク部１３０）で構成される場合を例に挙げて説明した。しかしながら、図５および図６を参照したようにしてヨーク部の磁極面の位置および向きを調整することができれば、必ずしもこのようにしてヨークを構成する必要はない。 In the present embodiment, the case where the yoke 100 is composed of three yoke portions (first yoke portion 110, second yoke portion 120, and third yoke portion 130) separated from each other has been described as an example. .. However, if the position and orientation of the magnetic pole surface of the yoke portion can be adjusted with reference to FIGS. 5 and 6, it is not always necessary to configure the yoke in this way.

図１０は、単板磁気特性試験器の構成の変形例を示す図である。本変形例の単板磁気特性試験器は、ヨーク１０００と、巻線枠２００と、励磁コイル３００と、磁束密度検出コイル４００とを有する。図１１に示す単板磁気特性試験器と図１に示した単板磁気特性試験器とでは、ヨーク１００、１０００が異なり、巻線枠２００、励磁コイル３００、および磁束密度検出コイル４００は同じである。 FIG. 10 is a diagram showing a modified example of the configuration of the single plate magnetic property tester. The single-plate magnetic property tester of this modification has a yoke 1000, a winding frame 200, an exciting coil 300, and a magnetic flux density detection coil 400. The single-plate magnetic property tester shown in FIG. 11 and the single-plate magnetic property tester shown in FIG. 1 have different yokes 100 and 1000, and the winding frame 200, the exciting coil 300, and the magnetic flux density detection coil 400 are the same. is there.

ヨーク１０００は、試験片Ｓと磁気的に結合され、ヨーク１０００と試験片Ｓとで閉磁路が形成される。
図１０において、ヨーク１０００は、第４ヨーク部１０１０、第５ヨーク部１０２０、第６ヨーク部１０３０、第７ヨーク部１０４０、およびヒンジ部１０５１〜１０５３を有する。図１１は、ヨーク１０００の構成の一例を示す図である。具体的に図１１（ａ）は、ヨーク１０００の平面図を示し、図１１（ｂ）は、図１０のIV−IVの部分で切った場合のヨーク１０００の断面図を示す。 The yoke 1000 is magnetically coupled to the test piece S, and a closed magnetic path is formed by the yoke 1000 and the test piece S.
In FIG. 10, the yoke 1000 has a fourth yoke portion 1010, a fifth yoke portion 1020, a sixth yoke portion 1030, a seventh yoke portion 1040, and hinge portions 1051 to 1053. FIG. 11 is a diagram showing an example of the configuration of the yoke 1000. Specifically, FIG. 11A shows a plan view of the yoke 1000, and FIG. 11B shows a cross-sectional view of the yoke 1000 when cut at the IV-IV portion of FIG.

第４ヨーク部１０１０は、平面形状が、長方形に対し短辺の１つを湾曲した凹形状とした形状を有する第１軟磁性体板１０１１と、平面形状が、長方形に対し短辺の１つを湾曲した凸形状とした形状を有する第２軟磁性体板１０１２とを、それらの板厚方向の両端が第１軟磁性体板１０１１となるように、当該長方形の長辺を合わせて交互に積み重ねて一体とすることにより構成される（図１１（ｂ）では、表記の都合上、１つの第１軟磁性体板、第２軟磁性体板にのみ符号１０１１、１０１２を付している）。これら第１軟磁性体板１０１１および第２軟磁性体板１０１２の板厚は同じである。また、第２軟磁性体板１０１２の凸形状となっている領域には穴が形成されており、第１軟磁性体板１０１１および第２軟磁性体板１０１２が積み重ねられることにより、第２軟磁性体板１０１２の凸形状となっている領域には、第１軟磁性体板１０１１および第２軟磁性体板１０１２の板厚方向に貫通する貫通穴が形成される。 The fourth yoke portion 1010 has a first soft magnetic plate 1011 having a planar shape in which one of the short sides of the rectangle is curved and concave, and the fourth yoke portion 1010 has a planar shape of one of the short sides of the rectangle. The second soft magnetic material plate 1012 having a curved convex shape is alternately aligned with the long sides of the rectangle so that both ends in the thickness direction of the second soft magnetic material plate 1011 become the first soft magnetic material plate 1011. It is configured by stacking and integrating (in FIG. 11B, for convenience of notation, only one first soft magnetic material plate and the second soft magnetic material plate are designated by reference numerals 1011 and 1012). .. The thickness of the first soft magnetic plate 1011 and the second soft magnetic plate 1012 are the same. Further, a hole is formed in the convex region of the second soft magnetic material plate 1012, and the first soft magnetic material plate 1011 and the second soft magnetic material plate 1012 are stacked to form a second soft magnetic material plate 1012. In the convex region of the magnetic plate 1012, through holes are formed through the first soft magnetic plate 1011 and the second soft magnetic plate 1012 in the plate thickness direction.

第５ヨーク部１０２０は、平面形状が、長方形に対し短辺の１つを湾曲した凹形状とし他の１つを湾曲した凸形状とした形状を有する複数の軟磁性体板１０２１を、当該凹形状と当該凸形状とが交互に配置されるように、当該長方形の長辺を合わせて積み重ねて一体とすることにより構成される（図１１（ｂ）では、表記の都合上、１つの軟磁性体板にのみ符号１０２１を付している）。複数の軟磁性体板１０２１の板厚は同じである。また、軟磁性体板１０２１の凸形状となっている領域には穴が形成されており、前述したようにして複数の軟磁性体板１０２１が積み重ねられることにより、軟磁性体板１０２１の凸形状となっている領域には、それぞれ、軟磁性体板１０２１の板厚方向に貫通する貫通穴が形成される。 The fifth yoke portion 1020 is formed by forming a plurality of soft magnetic plate 1021 having a planar shape having a concave shape in which one of the short sides is curved with respect to a rectangle and a convex shape in which the other one is curved. It is configured by stacking the long sides of the rectangles together so that the shapes and the convex shapes are arranged alternately (in FIG. 11B, for convenience of notation, one soft magnetism). Reference numeral 1021 is attached only to the body plate). The thickness of the plurality of soft magnetic plate 1021 is the same. Further, a hole is formed in the convex shape region of the soft magnetic material plate 1021, and as described above, a plurality of soft magnetic material plates 1021 are stacked to form a convex shape of the soft magnetic material plate 1021. Through holes penetrating the soft magnetic plate 1021 in the plate thickness direction are formed in each of the regions.

第６ヨーク部１０３０は、第５ヨーク部１０２０と同じ構成を有する。
第７ヨーク部１０４０は、平面形状が、長方形に対し短辺の１つを湾曲した凹形状とした形状を有する第１軟磁性体板１０４１と、平面形状が、長方形に対し短辺の１つを湾曲した凸形状とした形状を有する第２軟磁性体板１０４２とを、それらの板厚方向の両端が第２軟磁性体板１０４２となるように、当該長方形の長辺を合わせて交互に積み重ねて一体とすることにより構成される（図１１（ｂ）では、表記の都合上、１つの第１軟磁性体板、第２軟磁性体板にのみ符号１０４１、１０４２を付している）。これら第１軟磁性体板１０４１および第２軟磁性体板１０４２の板厚は同じである。また、第２軟磁性体板１０４２の凸形状となっている領域には穴が形成されており、第１軟磁性体板１０４１および第２軟磁性体板１０４２が積み重ねられることにより、第２軟磁性体板１０４２の凸形状となっている領域には、第１軟磁性体板１０４１および第２軟磁性体板１０４２板の板厚方向に貫通する貫通穴が形成される。 The sixth yoke portion 1030 has the same configuration as the fifth yoke portion 1020.
The seventh yoke portion 1040 has a first soft magnetic material plate 1041 having a concave shape in which one of the short sides of the rectangle is curved, and one of the short sides of the rectangle in the plane shape. The second soft magnetic plate 1042 having a curved convex shape is alternately aligned with the long sides of the rectangle so that both ends in the thickness direction of the second soft magnetic plate 1042 are the second soft magnetic plate 1042. It is configured by stacking and integrating (in FIG. 11B, for convenience of notation, only one first soft magnetic material plate and the second soft magnetic material plate are designated by reference numerals 1041 and 1042). .. The thickness of the first soft magnetic plate 1041 and the second soft magnetic plate 1042 are the same. Further, a hole is formed in the convex region of the second soft magnetic plate 1042, and the first soft magnetic plate 1041 and the second soft magnetic plate 1042 are stacked to form a second soft magnetic plate 1042. In the convex region of the magnetic plate 1042, through holes are formed through the first soft magnetic plate 1041 and the second soft magnetic plate 1042 in the plate thickness direction.

第５ヨーク部１０２０を構成する軟磁性体板１０２１の凸形状となっている領域に形成された貫通穴と、第６ヨーク部１０３０を構成する軟磁性体板１０３１の凸形状となっている領域に形成された貫通穴とが合うように第５ヨーク部１０２０および第６ヨーク部１０３０は組み合わされ、当該貫通孔にヒンジ部１０５２が挿入される。 A through hole formed in a convex region of the soft magnetic plate 1021 constituting the fifth yoke portion 1020 and a convex region of the soft magnetic plate 1031 constituting the sixth yoke portion 1030. The fifth yoke portion 1020 and the sixth yoke portion 1030 are combined so as to match the through hole formed in the above, and the hinge portion 1052 is inserted into the through hole.

第４ヨーク部１０１０を構成する第２軟磁性体板１０１２の凸形状となっている領域に形成された貫通穴と、第５ヨーク部１０２０を構成する軟磁性体板１０２１の凸形状となっている領域に形成された貫通穴のうち、ヒンジ部１０５２が挿入されない貫通穴とが合うように第４ヨーク部１０１０および第５ヨーク部１０２０は組み合わされ、当該貫通孔にヒンジ部１０５１が挿入される。 The through hole formed in the convex region of the second soft magnetic plate 1012 constituting the fourth yoke portion 1010 and the convex shape of the soft magnetic plate 1021 forming the fifth yoke portion 1020. Of the through holes formed in the region, the fourth yoke portion 1010 and the fifth yoke portion 1020 are combined so as to match the through holes into which the hinge portion 1052 is not inserted, and the hinge portion 1051 is inserted into the through holes. ..

第７ヨーク部１０４０を構成する第２軟磁性体板１０４２の凸形状となっている領域に形成された貫通穴と、第６ヨーク部１０３０を構成する軟磁性体板１０３１の凸形状となっている領域に形成された貫通穴のうち、ヒンジ部１０５２が挿入されない貫通穴とが合うように第６ヨーク部１０３０および第７ヨーク部１０４０は組み合わされ、当該貫通孔にヒンジ部１０５３が挿入される。 The through hole formed in the convex region of the second soft magnetic plate 1042 constituting the seventh yoke portion 1040 and the convex shape of the soft magnetic plate 1031 constituting the sixth yoke portion 1030. Of the through holes formed in the region, the sixth yoke portion 1030 and the seventh yoke portion 1040 are combined so as to match the through holes into which the hinge portion 1052 is not inserted, and the hinge portion 1053 is inserted into the through holes. ..

ヒンジ部１０５１〜１０５３は、非磁性且つ絶縁性を有し、第４ヨーク部１０１０、第５ヨーク部１０２０、第６ヨーク部１０３０、および第７ヨーク部１０４０が動いても変形しない強度を有する材料を用いて構成される。例えば、ヒンジ部１０５１〜１０５３は、ガラスエポキシ樹脂やフェノール樹脂を用いて構成される。
以上のようにして構成されるヨーク１０００の長手方向の両端面（第４ヨーク部１０１０、第７ヨーク部１０４０を構成する第１軟磁性体板１０１１、１０４１および第２軟磁性体板１０１２、１０４２の短辺のうち凹凸が形成されていない方の辺により構成される端面）が磁極面になる。 The hinge portions 1051 to 1053 are non-magnetic and insulating materials having strength that does not deform even if the fourth yoke portion 1010, the fifth yoke portion 1020, the sixth yoke portion 1030, and the seventh yoke portion 1040 move. Is constructed using. For example, the hinge portions 1051 to 1053 are configured by using a glass epoxy resin or a phenol resin.
Both end faces in the longitudinal direction of the yoke 1000 configured as described above (first soft magnetic material plates 1011 and 1041 and second soft magnetic material plates 1012 and 1042 constituting the fourth yoke portion 1010 and the seventh yoke portion 1040). The end face formed by the side of the short side on which the unevenness is not formed) becomes the magnetic pole surface.

ヒンジ部１０５１を回動軸として第４ヨーク部１０１０および第５ヨーク部１０２０が回動し、ヒンジ部１０５２を回動軸として第５ヨーク部１０２０および第６ヨーク部１０３０が回動し、ヒンジ部１０５３を回動軸として第６ヨーク部１０３０および第７ヨーク部１０４０が回動する。これにより、図１等に示したヨーク１００と同様に、第４ヨーク部１０１０の磁極面と第７ヨーク部１０４０の磁極面とがなす角度を変えたり、第４ヨーク部１０１０の磁極面と第７ヨーク部１０４０の磁極面とがなす角度を変えずに、第４ヨーク部１０１０の磁極面と第７ヨーク部１０４０の磁極面との距離を変えたりすることができる。 The fourth yoke portion 1010 and the fifth yoke portion 1020 rotate with the hinge portion 1051 as the rotation axis, and the fifth yoke portion 1020 and the sixth yoke portion 1030 rotate with the hinge portion 1052 as the rotation axis, and the hinge portion The sixth yoke portion 1030 and the seventh yoke portion 1040 rotate around the 1053 as a rotation axis. As a result, the angle formed by the magnetic pole surface of the fourth yoke portion 1010 and the magnetic pole surface of the seventh yoke portion 1040 can be changed, or the magnetic pole surface of the fourth yoke portion 1010 and the magnetic pole surface of the fourth yoke portion 1010 can be changed, similarly to the yoke 100 shown in FIG. The distance between the magnetic pole surface of the 4th yoke portion 1010 and the magnetic pole surface of the 7th yoke portion 1040 can be changed without changing the angle formed by the magnetic pole surfaces of the 7 yoke portion 1040.

以上のようにヨークは、図１等に示したヨーク１００のように複数の分離した部分を有していても、図１０等に示したヨーク１０００のように一体のものとしてもよい。尚、図１０等に示したようにしてヒンジ部を用いて複数のヨーク部を回動可能に連結する場合、ヒンジ部の数を多くすれば、磁極面の調整範囲を広げることができる。また、ヨーク部の数が３つであると、２つの磁極面のなす角度を変えずに、当該２つの磁極面の距離を変えることができない。従って、ヨーク部の数は４つ以上であるのが好ましい。 As described above, the yoke may have a plurality of separated portions as in the yoke 100 shown in FIG. 1 and the like, or may be integrated as in the yoke 1000 shown in FIG. 10 and the like. When a plurality of yoke portions are rotatably connected by using the hinge portions as shown in FIG. 10 and the like, the adjustment range of the magnetic pole surface can be widened by increasing the number of hinge portions. Further, when the number of yoke portions is three, the distance between the two magnetic pole surfaces cannot be changed without changing the angle formed by the two magnetic pole surfaces. Therefore, the number of yoke portions is preferably four or more.

また、本実施形態では、巻線枠２００が蛇腹状の領域を有する場合を例に挙げて説明した。前述したように、励磁コイル３００および磁束密度検出コイル４００のコイル軸に垂直な方向に切った場合の巻線枠２００（巻線枠本体部２１０）の中空領域の形状を、短辺に比べて長辺の長さが極端に長い長方形とするのが好ましい。磁束密度検出コイル４００と試験片Ｓとの間の領域を狭くすることができるからである。そこで、巻線枠本体部２１０を蛇腹状にすれば、巻線枠本体部２１０が曲げられることにより当該長方形が変形することを、当該変形を抑制するための特別な構成を付加することなく抑制することができるので好ましい。しかしながら、巻線枠２００は、試験片Ｓの曲げ形状に合わせて曲がるように可撓性を有し、その曲がった状態が保持されるようにしていれば、必ずしも、蛇腹状の部分を有していなくてもよい。例えば、巻線枠本体部の形状を、その長手方向の一端および他端を貫くように形成された中空領域を有する直方体形状としてもよい。この場合、例えば、当該直方体を、試験片Ｓの板面と平行な２つの第１部分と、試験片Ｓの板面と垂直な２つの第２部分とに分離し、当該直方体が曲げられることに応じて第１部分が第２部分に対して摺動するようにすることで、中空領域の形状の変形を抑制することができる。 Further, in the present embodiment, the case where the winding frame 200 has a bellows-shaped region has been described as an example. As described above, the shape of the hollow region of the winding frame 200 (winding frame main body 210) when cut in the direction perpendicular to the coil axis of the exciting coil 300 and the magnetic flux density detection coil 400 is compared with the short side. It is preferable that the length of the long side is an extremely long rectangle. This is because the region between the magnetic flux density detection coil 400 and the test piece S can be narrowed. Therefore, if the winding frame main body 210 is made into a bellows shape, the deformation of the rectangle due to the bending of the winding frame main body 210 is suppressed without adding a special configuration for suppressing the deformation. It is preferable because it can be used. However, the winding frame 200 has flexibility so as to bend according to the bending shape of the test piece S, and if the bent state is maintained, the winding frame 200 does not necessarily have a bellows-shaped portion. It does not have to be. For example, the shape of the winding frame main body may be a rectangular parallelepiped shape having a hollow region formed so as to penetrate one end and the other end in the longitudinal direction thereof. In this case, for example, the rectangular parallelepiped is separated into two first parts parallel to the plate surface of the test piece S and two second parts perpendicular to the plate surface of the test piece S, and the rectangular parallelepiped is bent. By making the first portion slide with respect to the second portion in accordance with the above, deformation of the shape of the hollow region can be suppressed.

尚、以上説明した本発明の実施形態は、何れも本発明を実施するにあたっての具体化の例を示したものに過ぎず、これらによって本発明の技術的範囲が限定的に解釈されてはならないものである。すなわち、本発明はその技術思想、またはその主要な特徴から逸脱することなく、様々な形で実施することができる。 It should be noted that the embodiments of the present invention described above are merely examples of embodiment of the present invention, and the technical scope of the present invention should not be construed in a limited manner by these. It is a thing. That is, the present invention can be implemented in various forms without departing from the technical idea or its main features.

１００、１０００：ヨーク、１１０：第１ヨーク部、１２０：第２ヨーク部、１３０：第３ヨーク部、１４０：第１取付部、１５０：第２取付部、２００：巻線枠、２１０：巻線枠本体部、２２０：固定部、２２２：第３取付部、２２３：第４取付部、３００：励磁コイル、４００：磁束密度検出コイル、１０１０：第４ヨーク部、１０２０：第５ヨーク部、１０３０：第６ヨーク部、１０４０：第７ヨーク部、１０５１〜１０５３：ヒンジ部 100, 1000: Yoke, 110: 1st yoke part, 120: 2nd yoke part, 130: 3rd yoke part, 140: 1st mounting part, 150: 2nd mounting part, 200: Winding frame, 210: Winding Wire frame body, 220: Fixed part, 222: 3rd mounting part, 223: 4th mounting part, 300: Exciting coil, 400: Magnetic flux density detection coil, 1010: 4th yoke part, 1020: 5th yoke part, 1030: 6th yoke part, 1040: 7th yoke part, 1051-1053: Hinge part

Claims

A test piece composed of a single magnetic plate, which is a single-plate magnetic property tester that measures the magnetic characteristics of a test piece with a bent plate surface.
A winding frame having a hollow region penetrating one end and the other end,
A yoke that is magnetically coupled to the test piece to form a closed magnetic path with the test piece,
A coil wound around the winding frame so as to surround the test piece, and an exciting coil for exciting the test piece.
A coil that is wound inward of the exciting coil with respect to the winding frame so as to surround the test piece, and is a magnetic flux density detection for detecting the magnetic flux density inside the excited test piece. With a coil,
The test piece is inserted into the hollow region and
A single-plate magnetic property tester characterized in that the winding frame is flexible and can be bent according to the bending shape of the test piece.

The region surrounding the hollow region of the winding frame has a bellows-shaped region.
The single-plate magnetic property tester according to claim 1, wherein the exciting coil and the magnetic flux density detection coil are arranged in the bellows-shaped recess.

The single-plate magnetic property tester according to claim 1 or 2, wherein the yoke can change the position and orientation of a magnetic pole surface that is a surface that comes into contact with the test piece.

The yoke has a plurality of yoke portions and has a plurality of yoke portions.
At least two of the plurality of yoke portions have the magnetic pole surface.
The yoke portion is configured by using a plurality of soft magnetic material plates.
The plate surface of the soft magnetic plate constituting the yoke portion and the plate surface of the soft magnetic plate constituting the other yoke portion come into mutual contact with each other.
By moving the yoke portion, the contact area between the plate surface of the soft magnetic material plate constituting the yoke portion and the plate surface of the soft magnetic material plate constituting the other yoke portion is changed. The single-plate magnetic property tester according to claim 3.

The yoke has a first yoke portion, a second yoke portion, and a third yoke portion.
The thickness of the soft magnetic plate constituting the first yoke portion, the second yoke portion, and the third yoke portion is substantially the same.
The first yoke portion has a plurality of the soft magnetic material plates arranged so that the plate surfaces face each other so as to have a gap every other plate or a plurality of plates.
The plate surface of the second yoke portion and the third yoke portion is such that one end surface thereof becomes a flat magnetic pole surface and the other end surface at a position facing the magnetic pole surface becomes an uneven surface corresponding to the gap. It has a plurality of the soft magnetic plates arranged so as to face each other, and has a plurality of the soft magnetic plates.
The second yoke portion and the convex portion of the concave-convex surface of the soft magnetic plate constituting the third yoke portion are inserted into the gap formed in the first yoke portion to form the second yoke portion and the second yoke portion and the convex portion. The single according to claim 4, wherein the plate surface of the soft magnetic plate constituting the third yoke portion and the plate surface of the soft magnetic plate constituting the first yoke portion come into contact with each other. Plate magnetic property tester.

The single-plate magnetic property tester according to any one of claims 1 to 5, wherein the exciting coil and the magnetic flux density detection coil have a flexible insulatingly coated electric wire.

Claims 1 to 1, wherein when the plastically deformed test piece is inserted into the hollow region of the winding frame, the winding frame is deformed according to the shape of the plastically deformed test piece. The single plate magnetic property tester according to any one of 6.

The veneer according to any one of claims 1 to 6, wherein the winding frame is deformed in response to elastic deformation of the test piece inserted into the hollow region of the winding frame. Magnetic property tester.

The veneer magnetic property test according to any one of claims 1 to 8, further comprising a fixing means for fixing the test piece inserted into the hollow region of the winding frame to the winding frame. vessel.