JPS5850461Y2 - Coil for identifying metal pieces - Google Patents
Coil for identifying metal piecesInfo
- Publication number
- JPS5850461Y2 JPS5850461Y2 JP1977019050U JP1905077U JPS5850461Y2 JP S5850461 Y2 JPS5850461 Y2 JP S5850461Y2 JP 1977019050 U JP1977019050 U JP 1977019050U JP 1905077 U JP1905077 U JP 1905077U JP S5850461 Y2 JPS5850461 Y2 JP S5850461Y2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- coin
- coil
- metal piece
- core
- 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.)
- Expired
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Testing Of Coins (AREA)
Description
【考案の詳細な説明】
本考案は、金属片判別素子に係り、とくに材質、形状の
異なる硬貨等の金属片の判別が可能な金属片判別素子に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a metal piece discriminating element, and more particularly to a metal piece discriminating element capable of discriminating metal pieces such as coins of different materials and shapes.
硬貨等の金属片を判別する方法の1つとしてコイルを使
用する方法がある。One method for identifying metal pieces such as coins is to use a coil.
これは、コイルにより生ずる磁界中に金属片を挿入する
ことによりその金属片にうず電流が流れ、このためにコ
イルのインピーダンスが変化することを利用するもので
ある。This utilizes the fact that when a metal piece is inserted into the magnetic field generated by the coil, an eddy current flows through the metal piece, which changes the impedance of the coil.
このようにコイルを使用して判別を行う場合、判別すべ
き金属片に平等磁界が加わるようにし、しかも平等磁界
の発生領域を金属片の片側の面積にほぼ等しく設定して
、判別性能の向上を図った構成が提案されている。When performing discrimination using a coil in this way, an equal magnetic field is applied to the metal piece to be discriminated, and the area where the equal magnetic field is generated is set to be approximately equal to the area of one side of the metal piece, thereby improving discrimination performance. A configuration aiming at this has been proposed.
第1図は、上記の点を考慮した金属片−!1slJ素子
の1例を示す。Figure 1 shows a metal piece that takes the above points into consideration! An example of a 1slJ element is shown.
この図において、コア1はフェライトのUUココア構成
され、一部にエアーギャップ2が形成される。In this figure, a core 1 has a UU cocoa structure of ferrite, and an air gap 2 is formed in a part thereof.
ここで、コア1の形状は、エアーギャップ2を形成する
コア1の端面3がエアーギャップ2に挿入されるべき硬
貨40片面の面積(磁束を横切る面積)にほぼ等しい面
積を持つように選定される。Here, the shape of the core 1 is selected so that the end surface 3 of the core 1 forming the air gap 2 has an area approximately equal to the area of one side of the coin 40 (the area across the magnetic flux) to be inserted into the air gap 2. Ru.
またコアIKは巻線5が施される。Further, the core IK is provided with a winding 5.
以上の構成によれば、エアーギャップ2中の磁界は実質
的に平等磁界となり、ここに硬貨4を挿入すると硬貨4
は磁束をほぼ垂直に横切ることになる。According to the above configuration, the magnetic field in the air gap 2 becomes a substantially uniform magnetic field, and when the coin 4 is inserted here, the coin 4
crosses the magnetic flux almost perpendicularly.
この結果、硬貨4にうず電流が生じ、前記コイルにイン
ピーダンスの変化を引起こす。As a result, eddy currents are generated in the coin 4, causing a change in impedance in the coil.
第2図は、上記の場合の硬貨挿入時におけるインピーダ
ンス変化量の周波数特性を示す。FIG. 2 shows the frequency characteristics of the amount of change in impedance when inserting a coin in the above case.
ここで、インピーダンス変化量は、硬貨の無い状態のイ
ンピーダンス値を基準として硬貨挿入によるインピーダ
ンスの変化を百分率で示しており、実線Aは50円硬貨
、実線Bは100円硬貨の場合を示す。Here, the amount of change in impedance indicates the change in impedance due to coin insertion as a percentage based on the impedance value without a coin, and the solid line A indicates the case of a 50 yen coin and the solid line B indicates the case of a 100 yen coin.
この図から、50円硬貨と100円硬貨の如き材質が同
じで外径のみが異なるような場合であっても確実に判別
可能であることが判る。From this figure, it can be seen that even in cases where a 50 yen coin and a 100 yen coin are made of the same material and differ only in outer diameter, they can be reliably distinguished.
ところで、上記の金属片判別素子であると、コア1の太
さ、すなわち断面積が硬貨の片面の面積とほぼ等しくな
げればならず、コア1の形状はかなり大きなものとなる
。By the way, in the case of the metal piece discriminating element described above, the thickness of the core 1, that is, the cross-sectional area must be approximately equal to the area of one side of a coin, and the shape of the core 1 becomes quite large.
このため、そのコイル全体の形状も大形化し、コア1の
材料費も高価となる欠点を有している。For this reason, the shape of the entire coil becomes large, and the material cost of the core 1 also becomes expensive.
本考案は、上記の欠点を除去し、判別機能を損うことな
く形状の小形化、コストの低減を図った金属片判別素子
を提供しようとするものである。The present invention aims to eliminate the above-mentioned drawbacks, and to provide a metal piece discriminating element that is smaller in size and lower in cost without impairing the discriminating function.
本考案の特徴は、一対のU字状のフェライト磁心を一端
にギャップを形成する如く組合わせ、該磁心にコイルを
巻回するとともに、前記ギャップの端部面に各々相対向
するように別個のフェライトのディスクから成る磁性板
を配設し、前記磁性板は前記磁心の端部面より広い面を
有するように形成し、前記コイルに10kHz以上の高
周波電流を印加することにある。The feature of the present invention is that a pair of U-shaped ferrite magnetic cores are combined to form a gap at one end, a coil is wound around the magnetic core, and separate coils are wound on the end surfaces of the gap so as to face each other. A magnetic plate made of a ferrite disk is provided, the magnetic plate is formed to have a wider surface than the end surface of the magnetic core, and a high frequency current of 10 kHz or more is applied to the coil.
以下、本考案に係る金属片判別素子の実施例を図面に従
って説明する。Embodiments of the metal piece discriminating element according to the present invention will be described below with reference to the drawings.
第3図において、コア10は、断面の小さなフェライト
のUUココアらなり、一部に間隙が形成される。In FIG. 3, the core 10 is made of ferrite UU cocoa with a small cross section, and a gap is formed in a part.
そして、コア10の足11の端部12には、夫々相対向
するように磁性板13が固着される。Magnetic plates 13 are fixed to the ends 12 of the legs 11 of the core 10 so as to face each other.
すなわち、各磁性板13は本来耐摩耗性に優れているフ
ェライトのディスクコアがら成り、その対向面積が挿入
される硬貨140片面の面積にほぼ等しくなるように選
ばれ、前記コア10の端部12に磁気的結合が阻害され
ることのないように接着剤等によって接着固定されてい
る。That is, each magnetic plate 13 is made of a ferrite disk core which is inherently excellent in wear resistance, and is selected so that its facing area is approximately equal to the area of one side of the coin 140 inserted, and the end portion 12 of the core 10 It is fixed with an adhesive or the like so that the magnetic coupling is not inhibited.
これにより、磁性板13間のエアーギャップ15中に平
等磁界が実質的に発生されるようになっている。Thereby, a substantially uniform magnetic field is generated in the air gap 15 between the magnetic plates 13.
なお、コア10には巻線16が施されている。Note that a winding 16 is provided on the core 10.
以上の構成において、硬貨14をエアーギャップ15中
に挿入すれば、硬貨14は磁束をほぼ垂直に横切る。In the above configuration, when the coin 14 is inserted into the air gap 15, the coin 14 crosses the magnetic flux almost perpendicularly.
この結果、硬貨14にうず電流を生じ、インピーダンス
の変化を引起こす。As a result, an eddy current is generated in the coin 14, causing a change in impedance.
第4図は上記実施例の場合の硬貨挿入時におけるインピ
ーダンス変化量の周波数特性を示す。FIG. 4 shows the frequency characteristics of the amount of change in impedance when a coin is inserted in the above embodiment.
ここで、インピーダンス変化量は、硬貨の無い状態での
インピーダンス値を基準として硬貨挿入によるインピー
ダンスの変化を百分率で示しており、実線Cは50円硬
貨、実線りは100円硬貨の場合を示す。Here, the amount of change in impedance indicates the change in impedance due to the insertion of a coin as a percentage based on the impedance value without a coin, and the solid line C indicates the case of a 50 yen coin and the solid line C indicates the case of a 100 yen coin.
この図から、50円硬貨と100円硬貨の如き材質が同
じで外径のみが異なるような場合であっても、充分に判
別可能であることが判る。From this figure, it can be seen that even in cases where a 50 yen coin and a 100 yen coin are made of the same material and differ only in outer diameter, they can be sufficiently distinguished.
以上説明したように、上記実施例によれば、硬貨片面の
面積とほぼ等しい断面積を有する大形のコアを用いた場
合と同様の判別能力を得ることができ、形状の小形化、
重量の軽量化、材料費の低減化を図ることができる。As explained above, according to the above embodiment, it is possible to obtain the same discrimination ability as when using a large core having a cross-sectional area approximately equal to the area of one side of a coin, and to reduce the size of the coin.
It is possible to reduce weight and material costs.
さらに、金属磁性材に比べ耐摩耗性に優れたフェライト
で磁性板13を構成しているので、長寿命化を図ること
ができる。Furthermore, since the magnetic plate 13 is made of ferrite, which has better wear resistance than metal magnetic materials, a longer life can be achieved.
叙上の様に、本考案によれば、判別機能を損うことな(
形状の小形化、コストの低減を図った金属片判別素子を
得る。As mentioned above, according to the present invention, the discrimination function is not impaired (
A metal piece discriminating element is obtained which has a smaller size and lower cost.
第1図は判別すべき金属片の片側の面積にほぼ等しい断
面積のコアを用いた金属片判別素子を示す側面図、第2
図は硬貨挿入によるインピーダンス変化量の周波数特性
を示すグラフ、第3図は本考案に係る金属片判別素子の
実施例を示す側面図、第4図は実施例における硬貨挿入
によるインピーダンス変化量の周波数特性を示すグラフ
である。
10・・・・・・コア、12・・・・・・足、13・・
・・・・磁性板、14・・・・・・硬貨、15・・・・
・・エアーギヤツブ。Fig. 1 is a side view showing a metal piece discriminating element using a core with a cross-sectional area approximately equal to the area of one side of the metal piece to be discriminated;
The figure is a graph showing the frequency characteristics of the impedance change due to coin insertion, Figure 3 is a side view showing an embodiment of the metal piece discriminating element according to the present invention, and Figure 4 is the frequency characteristic of the impedance change due to coin insertion in the embodiment. It is a graph showing characteristics. 10...core, 12...legs, 13...
... Magnetic plate, 14 ... Coin, 15 ...
...Air gear.
Claims (1)
する如く組合わせ、その一方にのみコイルを巻回すると
ともに、前記ギャップの端部面に各々相対向するように
別個のフェライトからなる耐摩耗性ディスクの磁性板を
配設し、前記各磁性板の対向面は前記磁心の端部面より
も広くかつ判別すべき金属片の片面の面積にほぼ等しい
面積を有するように形成し、前記コイルには10kHz
以上の高周波電流を印加したことを特徴とする金属片判
別素子。A pair of U-shaped ferrite magnetic cores are combined so as to form a gap at one end, and a coil is wound around only one of the cores, and a wear-resistant magnetic core made of separate ferrite is placed so as to face each other on the end surface of the gap. magnetic plates of the magnetic disk are disposed, the opposing surfaces of each of the magnetic plates are formed to have an area wider than the end surface of the magnetic core and approximately equal to the area of one side of the metal piece to be discriminated, and the coil 10kHz for
A metal piece discriminating element characterized in that a high frequency current of the above level is applied.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1977019050U JPS5850461Y2 (en) | 1977-02-21 | 1977-02-21 | Coil for identifying metal pieces |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1977019050U JPS5850461Y2 (en) | 1977-02-21 | 1977-02-21 | Coil for identifying metal pieces |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS53115091U JPS53115091U (en) | 1978-09-13 |
JPS5850461Y2 true JPS5850461Y2 (en) | 1983-11-17 |
Family
ID=28847437
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1977019050U Expired JPS5850461Y2 (en) | 1977-02-21 | 1977-02-21 | Coil for identifying metal pieces |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5850461Y2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6095063B2 (en) * | 2013-07-31 | 2017-03-15 | 日立Geニュークリア・エナジー株式会社 | Eddy current testing probe |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4938293U (en) * | 1972-07-03 | 1974-04-04 |
-
1977
- 1977-02-21 JP JP1977019050U patent/JPS5850461Y2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS53115091U (en) | 1978-09-13 |
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