JPH03181879A - Detecting head of metal detector - Google Patents
Detecting head of metal detectorInfo
- Publication number
- JPH03181879A JPH03181879A JP1322191A JP32219189A JPH03181879A JP H03181879 A JPH03181879 A JP H03181879A JP 1322191 A JP1322191 A JP 1322191A JP 32219189 A JP32219189 A JP 32219189A JP H03181879 A JPH03181879 A JP H03181879A
- Authority
- JP
- Japan
- Prior art keywords
- receiving coils
- detection head
- yoke
- coils
- metal detector
- 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.)
- Granted
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 37
- 239000002184 metal Substances 0.000 title claims abstract description 37
- 238000001514 detection method Methods 0.000 claims abstract description 37
- 230000003068 static effect Effects 0.000 claims description 9
- 230000004907 flux Effects 0.000 abstract description 20
- 230000007257 malfunction Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 abstract 1
- 150000002739 metals Chemical class 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 244000171726 Scotch broom Species 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 235000015243 ice cream Nutrition 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 235000013580 sausages Nutrition 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
Description
【発明の詳細な説明】
く本発明の産業上の利用分野〉
本発明は、永久磁石による静磁界によって、被検査体中
の金属の有無を検出する、金属検出機の検出ヘッドに関
する。DETAILED DESCRIPTION OF THE INVENTION Industrial Application Field of the Present Invention The present invention relates to a detection head of a metal detector that detects the presence or absence of metal in an object to be inspected using a static magnetic field generated by a permanent magnet.
〈従来技術〉
製品、例えばソーセージ、アイスクリームなどの食料品
中には、微小な金属、例えば針先、刃先などの金属破片
などが製造工程において誤って混入する場合があり、こ
のような製品中の金属を検出する必要がある。<Prior art> Microscopic metals, such as metal fragments such as needle tips and cutting edges, may be accidentally mixed into products such as sausages and ice cream during the manufacturing process. metals need to be detected.
しかして、製品がアルミニウム箔のような非鉄金属の袋
で包装されている場合には、この金属の袋による影響を
少なくするためには、静磁界によって、製品中の金属の
検出を行なうことがよいことが知られており、従来、強
い静磁界を生じるように、コイルに直流電流を供給する
代りに、永久磁石を用いることが提案されている（実開
昭５９−１５５５７１）。However, if the product is packaged in a bag made of non-ferrous metal such as aluminum foil, it is possible to detect the metal in the product using a static magnetic field in order to reduce the influence of the metal bag. It has been proposed to use a permanent magnet instead of supplying a direct current to the coil to generate a strong static magnetic field (Japanese Utility Model Publication No. 59-155571).
即ち、第７図（ａ）、（ｂ）、（ｃ）に示すように、こ
の永久磁石による静磁界を用いた従来の金属検出機の検
出ヘッド１では、搬送ベルト４が通る中空部１ａの下側
に、長手状に巻き返された同一形状の２つの受信コイル
２ａ、２ｂを、被検査体Ｗの搬送方向に隣り合わせて並
べて左右対称に配置し、この２つの受信コイル２ａ、２
ｂの境界線に′ＰｒＩ−）た上方に位置するように、中
空部１ａの上側に複数の永久磁石３．３、・・・・・・
を設置している。永久磁石３．３、・・・・・・は、す
べてＮ極、Ｓ極がそれぞれ同一側にあり、磁束が第７図
（ｂ）に示すように、左右対称に配置された２つの受信
コイル２ａ１２ｂを同一本数横切るように配置されてい
る。That is, as shown in FIGS. 7(a), (b), and (c), in the detection head 1 of the conventional metal detector using the static magnetic field of this permanent magnet, the On the lower side, two receiving coils 2a and 2b of the same shape that have been rolled back into a longitudinal shape are arranged side by side in the transport direction of the object W to be inspected and are arranged symmetrically.
A plurality of permanent magnets 3.3, .
is installed. The permanent magnets 3.3, . The same number of lines are arranged to cross 2a12b.
搬送ベルト４によって、アルミニウム包装物Ａで包装さ
れた製品Ｗを、２つの受信コイル２ａ１２ｂの並んだ方
向へ通過させると、製品Ｗ中に金属が存在する場合、永
久磁石２．２）・・・・・・による静磁界に変化を生じ
、このため受信コイル２ａ、２ｂを横切る磁束の本数が
変化して、受信コイル２ａ、２ｂにそれぞれ誘起電圧が
生じ、両者の誘起電圧に差が生じる。この差電圧によっ
て、製品Ｗ中の金属の存在が検出される。When the product W wrapped in the aluminum package A is passed by the conveyor belt 4 in the direction in which the two receiving coils 2a12b are lined up, if metal is present in the product W, permanent magnets 2.2)... ... causes a change in the static magnetic field, and as a result, the number of magnetic fluxes crossing the receiving coils 2a, 2b changes, causing induced voltages in the receiving coils 2a, 2b, respectively, and causing a difference in the induced voltages between the two. The presence of metal in the product W is detected by this differential voltage.
く本発明が解決しようとする問題点〉
しかしながら、この金属検出機の検出ヘッド１では、第
７図（ｂ）に示すように、検出ヘッド１の外部への洩れ
磁束が多いため、検出ヘッド１の周辺の機器（コンベヤ
、モータ、ソレノイド）からのノイズの影響で磁束に変
化を生じ、このため、被検査体中の金属の検出において
、誤動作を生じやすかった。Problems to be Solved by the Present Invention> However, in the detection head 1 of this metal detector, as shown in FIG. 7(b), there is a large amount of magnetic flux leaking to the outside of the detection head 1. Noise from peripheral equipment (conveyors, motors, solenoids) causes changes in the magnetic flux, which tends to cause malfunctions when detecting metal in the object being inspected.
本発明はこのような問題点を解決し、洩れ磁束を少なく
して、周辺の機器からのノイズの影響による誤動作を生
じないようにした金属検出機の検出ヘッドを提供するこ
とを目的としている。SUMMARY OF THE INVENTION An object of the present invention is to solve these problems and provide a detection head for a metal detector that reduces leakage magnetic flux and prevents malfunctions due to the influence of noise from peripheral equipment.
〈前記問題点を解決するための手段〉
前記問題点を解決するために本発明の金属検出機の検出
ヘッドでは、永久磁石による静磁界が２つの受信コイル
を通る磁気回路を構成するようにヨークを設けたことを
特徴としている。<Means for solving the above problems> In order to solve the above problems, the detection head of the metal detector of the present invention has a yoke so that the static magnetic field from the permanent magnet forms a magnetic circuit through two receiving coils. It is characterized by having the following.
く作用〉
このようにしたため、本発明の金属検出機の検出ヘッド
では、永久磁石からの磁束の大部分はヨークのために２
つの受信コイルを通るようになって、この結果、外部へ
の洩れが著しく減少する。As described above, in the detection head of the metal detector of the present invention, most of the magnetic flux from the permanent magnet is transferred to the yoke.
As a result, leakage to the outside is significantly reduced.
このため、周辺の機器のノイズの影響による磁束の変化
が少なくなり、金属検出における誤動作が少なくなる。Therefore, changes in magnetic flux due to the influence of noise from peripheral devices are reduced, and malfunctions in metal detection are reduced.
さらに２つの受信コイル近傍の磁束が強くなるため、金
属検出の感度も向上する。Furthermore, since the magnetic flux near the two receiving coils becomes stronger, the sensitivity of metal detection also improves.
く本発明の実施例〉 以下、図面に基づいて本発明の詳細な説明する。Examples of the present invention> Hereinafter, the present invention will be explained in detail based on the drawings.
第１図（ａ）、（ｂ）は本発明による金属検出機の検出
ヘッドの一実施例を示している。FIGS. 1(a) and 1(b) show an embodiment of a detection head of a metal detector according to the present invention.
第１図（ａ）、（ｂ）において、１０は検出ヘッド、１
１は口の字状をした検出ヘッド本体であって、その中央
に、搬送コンベヤ２０が通る中空部１１ａが、設けられ
ている。In FIGS. 1(a) and 1(b), 10 is a detection head;
Reference numeral 1 denotes a detection head body having a mouth shape, and a hollow portion 11a through which a conveyor 20 passes is provided in the center thereof.
検出ヘッド本体１１の中空部１１ａの下側（検出ヘッド
本体１１の下部）には、長手状に巻き返された同一形状
の２つの受信コイル１２ａ、１２ｂが、搬送コンベヤ２
０の搬送方向に隣り合わせて並べて左右対称に配置され
ている。Under the hollow part 11a of the detection head body 11 (lower part of the detection head body 11), two receiving coils 12a and 12b having the same shape and wound longitudinally are connected to the conveyor 2.
They are arranged side by side in the conveyance direction of 0 and are symmetrically arranged.
検出ヘッド本体１１の中空部１１ａの上側（検出ヘッド
本体１１の上部）には、２つの受信コイル１２ａ、１２
ｂの境界線に沿った上方に位置するように、直線状に複
数の永久磁石１３．１３、・・・・・・が設置されてい
る。これらの永久磁石１３．１３、・・・・・・は、Ｎ
極、Ｓ極がそれぞれ同一側にあり、その磁束は第１図（
ｂ）に示すように、左右対称に配置された２つの受信コ
イル１２ａ、１２ｂを同一本数横切るように、永久磁石
１３．１３、・・・・・・は配置されている。Above the hollow part 11a of the detection head main body 11 (the upper part of the detection head main body 11), there are two receiving coils 12a, 12.
A plurality of permanent magnets 13, 13, . . . are installed in a straight line so as to be located above the boundary line b. These permanent magnets 13.13,... are N
The pole and S pole are on the same side, and the magnetic flux is as shown in Figure 1 (
As shown in b), the permanent magnets 13, 13, .
そして、この永久磁石１３．１３、・・・・・・による
静磁界が２つの受信コイルを通る磁気回路を構成するよ
うに、ヨーク１４が設けられている。The yoke 14 is provided so that the static magnetic field generated by the permanent magnets 13, 13, . . . constitutes a magnetic circuit passing through the two receiving coils.
即ち、ヨーク１４は検出ヘッド本体１１内を円環し、検
出ヘッド本体１１内の上部及び下部において、互いに接
近する方向に突出した突出部１４ａ、１４ｂを有し、一
方の突出部１４ａの先端に永久磁石１３．１３、・・・
・・・を配置することによって、突出部１４ａ、１４ｂ
間をギャップとする磁気回路を構成している。That is, the yoke 14 forms a ring inside the detection head body 11, and has protrusions 14a and 14b that protrude toward each other at the upper and lower parts of the detection head body 11. Permanent magnet 13.13,...
By arranging the protrusions 14a, 14b
A magnetic circuit is formed with a gap between the two.
なお、第１図において、２０は、被検査体を検出ヘッド
１０の中空部１１ａを２つの受信コイル１２ａ、１２ｂ
寄りの位置で２つの受信コイル１２ａ、１２ｂの並んだ
方向に搬送する、第 図に示したのと同じ搬送コンベヤ
であり、２０ａ〜２０ｄは搬送コンベヤのローラである
。In FIG. 1, reference numeral 20 indicates that the hollow part 11a of the detection head 10 is connected to the two receiving coils 12a and 12b.
This conveyor is the same as that shown in FIG. 1, which conveys in the direction in which the two receiving coils 12a and 12b are lined up at a closer position, and 20a to 20d are rollers of the conveyor.
搬送コンベヤ２０によって、アルミニウム包装物Ａで包
装された製品Ｗを次々と通過させる。製品Ｗ中に金属が
存在すると、受信コイル１２ａ、１２ｂを通過するとき
に、永久磁石１３．１３、・・・・・・による静磁界に
変化を生じ、このため受信コイル１２ａ、１２ｂを横切
る磁束の本数が変化して、受信コイル１２ａ、１２ｂ１
．：誘起電圧が生じ、両者の差電圧が生じる。この差電
圧によって、製品Ｗ中の金属の存在が、検出回路（図示
せず）によって検出される。この検出において、ヨーク
１４によって、２つの受信コイル１２ａ、１２ｂが設置
された中空部１１ａをギャップとする磁気回路が構成さ
れているため、検出ヘッド１０の外部への洩れ磁束は著
しく少なくなるため、前記した外部ノイズによる磁束へ
の影響が少なくなるので、外部ノイズによる誤検出が著
しく減少し、また受信コイル１２ａ、１２ｂ近傍の磁束
が強くなり、その結果、極めて微小な金属の検出も可能
となる。The conveyor 20 passes the products W wrapped in aluminum packaging A one after another. If metal is present in the product W, when it passes through the receiving coils 12a, 12b, it causes a change in the static magnetic field due to the permanent magnets 13, 13, . The number of receiving coils 12a, 12b1 changes.
．． : An induced voltage is generated, and a differential voltage between the two is generated. Based on this differential voltage, the presence of metal in the product W is detected by a detection circuit (not shown). In this detection, since the yoke 14 forms a magnetic circuit with the gap being the hollow part 11a in which the two receiving coils 12a and 12b are installed, the leakage magnetic flux to the outside of the detection head 10 is significantly reduced. Since the influence of external noise on the magnetic flux described above is reduced, erroneous detection due to external noise is significantly reduced, and the magnetic flux near the receiving coils 12a and 12b becomes stronger, making it possible to detect extremely small metals. .
なお、第２図に示すように、磁性体による磁気シールド
１５を、ヨーク１４の外側に設ければ、−層洩れ磁束が
少なくなる。Note that, as shown in FIG. 2, if a magnetic shield 15 made of a magnetic material is provided outside the yoke 14, the negative layer leakage magnetic flux is reduced.
なお、第１図のような磁束を生じるようにＮ極、Ｓ極が
上下になったものであれば、第１図（ａ）、（ｂ）のよ
うに小さな複数の永久磁石１３．１３、・・・・・・を
設ける代りに、第３図に示すよに１つの永久磁石１６を
用いてもよい。In addition, if the N and S poles are vertically arranged to generate magnetic flux as shown in Fig. 1, a plurality of small permanent magnets 13, 13, as shown in Fig. 1 (a) and (b) are used. Instead of providing . . . , one permanent magnet 16 may be used as shown in FIG.
また、第４図、第５図に示すように永久磁石１３．１６
を上下両側に設けてもよい。In addition, as shown in Figures 4 and 5, permanent magnets 13.16
may be provided on both the upper and lower sides.
また、第６図に示すようにヨーク１４の側部に永久磁石
１７を片側又は両側に設けてもよい。Further, as shown in FIG. 6, permanent magnets 17 may be provided on one side or both sides of the yoke 14.
以上、本発明の詳細な説明したが、さらに種々の変形が
可能なことは勿論である。Although the present invention has been described in detail above, it goes without saying that various modifications are possible.
く本発明の効果〉
以上説明したように、本発明の金属検出機の検出ヘッド
では、ヨークを設けて２つの受信コイルを磁束が通る磁
気回路を構成したので、洩れ磁束を著しく減少し、この
ため外部ノイズによる磁束への影響が著しく低減して、
誤検出が著しく少なくなり、さらに受信コイル近傍の磁
束が強くなるため、微小な金属の検出が可能となる。Effects of the Invention> As explained above, in the detection head of the metal detector of the present invention, a yoke is provided to configure a magnetic circuit in which the magnetic flux passes through the two receiving coils, so leakage magnetic flux is significantly reduced, and this Therefore, the influence of external noise on magnetic flux is significantly reduced,
Misdetection is significantly reduced, and the magnetic flux near the receiving coil is strengthened, making it possible to detect minute metals.
第１〜５図（ａ）、（ｂ）はそれぞれ本発明の第１〜５
実施例を示すもので、第１〜５図（ａ）はＩ１１断面図
、第１〜５（ｂ）は各第１〜５図（ａ）における中央１
１１ｒｌＩｒ面図である。
第６図は本発明の第６実施例を示す縦断面図である。
第７図（ａ）は従来の金属検出機の検出ヘッドを示す斜
視図、同図（ｂ）はｌ断面図、同図（Ｃ）は中央縦断面
図である。
１０・・・・・・検出ヘッド、１１・・・・・・検出ヘ
ッド本体、１１ａ・・・・・・中空部、１２ａ、１２ｂ
・・・・・・受信コイル、１３・・・・・・永久磁石、
１４・・・・・・ヨーク、１５・・・・・・轍気シール
ド、１６．１７・・・・・・永久磁石、２゜・・・・・
・搬送コンベヤ、２０ａ〜２０ｄ・・・・・・ローラ。
第１
−（０）
０
第
ヨ
図
（ｂ）
第２図（０）
第２日
（ｂ）
第３図
（０）
０
第３図（ｂ）
第４図（０）
０
第４図（ｂ）
第５
囚
（０）
箒５図（ｂ）
第６図
第７図（０）
ｂ
第７図（ｂ）
第７図（Ｃ）
手続補正型
（方式）
１、事件の表示
平成１年 特許願 第３２２１９１月
２）発明の名称
金属検出機の検出ヘッド
３、補正をする者
事件との関係 特許出願人
住所 東京都港区南麻布５丁目１０番２７号名称 （０
５７）アンリツ株式会社
代表者 菅居紳至
４、代理人〒１４１ 電話４９０−４５１６住所
東京部品川区大崎１−１７−５６、補正の対象
明細書の「図面の簡単な説明」の欄
７、補正の内容
明細書の第１０頁の第６〜９行の「第１〜５・・・・・
・・・・・・・図である。」を
「第１〜５図はそれぞれ本発明の第１〜５実施例を示す
もので、第１〜５図の（ａ ）は縦断面図、第１〜５図
の（ｂ ）は各第１〜５図の（ａ ）における中央縦断
面図である。」と補正する。Figures 1 to 5 (a) and (b) are the first to fifth figures of the present invention, respectively.
1 to 5 (a) are I11 sectional views, and 1 to 5 (b) are center 1 sectional views in each of Figs. 1 to 5 (a).
11rlIr plane view. FIG. 6 is a longitudinal sectional view showing a sixth embodiment of the present invention. FIG. 7(a) is a perspective view showing a detection head of a conventional metal detector, FIG. 7(b) is a sectional view at 1, and FIG. 7(C) is a central longitudinal sectional view. 10...Detection head, 11...Detection head body, 11a...Hollow part, 12a, 12b
...Receiving coil, 13...Permanent magnet,
14...Yoke, 15...Rut air shield, 16.17...Permanent magnet, 2゜...
- Conveyor, 20a-20d...Roller. 1-(0) 0 Figure Yo (b) Figure 2 (0) Day 2 (b) Figure 3 (0) 0 Figure 3 (b) Figure 4 (0) 0 Figure 4 (b ) 5th prisoner (0) Broom 5 figure (b) 6 figure 7 figure 7 (0) b figure 7 (b) figure 7 (C) Procedural amendment type (method) 1. Indication of case 1999 Patent Application No. 32219 January 2) Name of the invention Detection head 3 of a metal detector, relationship with the amendment case Patent applicant address 5-10-27 Minami-Azabu, Minato-ku, Tokyo Name (0
57) Anritsu Corporation Representative Shinji Sugai 4, Agent 141 Telephone 490-4516 Address
1-17-56 Osaki, Honbunagawa-ku, Tokyo, “Brief explanation of drawings” column 7 of the specification subject to amendment, “1st to 5th lines 6th to 9th of page 10 of the specification of contents of amendment”・・・・・・
......This is a diagram. "Figures 1 to 5 show the first to fifth embodiments of the present invention, respectively, where (a) in Figures 1 to 5 is a longitudinal cross-sectional view, and (b) in Figures 1 to 5 is a longitudinal sectional view. 1 to 5. This is a central vertical cross-sectional view in (a) of FIGS.
Claims (4)
一平面上に並べて設け、被検査体を前記２つの受信コイ
ルが並んだ方向に移動させたときに前記２つの受信コイ
ルに生ずる誘起電圧の変動によつて被検査体中の金属を
検出する金属検出機の検出ヘッドにおいて、前記永久磁
石による静磁界が前記２つの受信コイルを通る磁気回路
を構成するようにヨークを設けたことを特徴とする金属
検出機の検出ヘッド。(1) Two receiving coils are placed side by side on the same plane in a static magnetic field generated by a permanent magnet, and when the object to be inspected is moved in the direction in which the two receiving coils are lined up, the induced voltage that occurs in the two receiving coils. In the detection head of a metal detector that detects metal in an object to be inspected by fluctuations in Detection head of metal detector.
ッドにおいて、前記永久磁石および前記２つの受信コイ
ルおよび前記ヨークを覆って、且つ前記被検査体が前記
永久磁石と前記２つの受信コイルとの間を移動すること
を許す開口部を有する磁気シールドを設けたことを特徴
とする金属検出機の検出ヘッド。(2) In the detection head of the metal detector according to claim 1, the permanent magnet, the two receiving coils, and the yoke are covered, and the object to be inspected covers the permanent magnet, the two receiving coils, and the yoke. A detection head for a metal detector, characterized in that it is provided with a magnetic shield having an opening that allows movement between the coil and the magnetic shield.
出体に向いていない磁極に接して、該磁極から伸び、前
記２つの受信コイルの被検出体に向いていない側まで達
する形状を有することを特徴とする特許請求の範囲第１
項または第２項記載の金属検出機の検出ヘッド。(3) The yoke has a shape in which it touches the magnetic pole of the two magnetic poles of the permanent magnet that does not face the detected object, extends from the magnetic pole, and reaches the side of the two receiving coils that does not face the detected object. The first claim characterized in that
A detection head of a metal detector according to item 1 or 2.
に配置され、前記２つの受信コイルが、被検査体の移動
する領域の下部に配置され、前記ヨークが、該永久磁石
の上部に接し、さらに該永久磁石の上部から、被検査体
の移動する領域の移動方向に対して左右に伸び、該２つ
の受信コイルの下部まで達する形状を有することを特徴
とする特許請求の範囲第３項記載の金属検出機の検出ヘ
ッド。(4) The permanent magnet is placed above the area where the object to be inspected moves, the two receiving coils are placed below the area where the object to be inspected moves, and the yoke is placed above the area where the object to be inspected moves. , and has a shape that further extends from the upper part of the permanent magnet to the left and right with respect to the movement direction of the area in which the object to be inspected moves, and reaches the lower part of the two receiving coils. Detection head of the metal detector according to item 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1322191A JPH0816703B2 (en) | 1989-12-12 | 1989-12-12 | Mixed metal detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1322191A JPH0816703B2 (en) | 1989-12-12 | 1989-12-12 | Mixed metal detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03181879A true JPH03181879A (en) | 1991-08-07 |
| JPH0816703B2 JPH0816703B2 (en) | 1996-02-21 |
Family
ID=18140960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1322191A Expired - Lifetime JPH0816703B2 (en) | 1989-12-12 | 1989-12-12 | Mixed metal detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0816703B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014034583A1 (en) * | 2012-08-31 | 2014-03-06 | 国立大学法人豊橋技術科学大学 | Apparatus for detecting minute magnetic metal foreign bodies |
| WO2017002698A1 (en) * | 2015-06-29 | 2017-01-05 | 株式会社荏原製作所 | Metal detection sensor and metal detection method using same |
| JP2018146323A (en) * | 2017-03-03 | 2018-09-20 | 宮城県 | Foreign substance inspection device |
| JP6425108B1 (en) * | 2018-07-04 | 2018-11-21 | 株式会社先磁研 | metal detector |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55103585U (en) * | 1979-01-12 | 1980-07-19 | ||
| JPS59155571U (en) * | 1983-04-04 | 1984-10-18 | アンリツ株式会社 | Detection head of metal detection device |
| JPS6115580U (en) * | 1984-07-02 | 1986-01-29 | 川崎市高津区久末１６７７番地 | iron piece detector |
-
1989
- 1989-12-12 JP JP1322191A patent/JPH0816703B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55103585U (en) * | 1979-01-12 | 1980-07-19 | ||
| JPS59155571U (en) * | 1983-04-04 | 1984-10-18 | アンリツ株式会社 | Detection head of metal detection device |
| JPS6115580U (en) * | 1984-07-02 | 1986-01-29 | 川崎市高津区久末１６７７番地 | iron piece detector |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014034583A1 (en) * | 2012-08-31 | 2014-03-06 | 国立大学法人豊橋技術科学大学 | Apparatus for detecting minute magnetic metal foreign bodies |
| WO2017002698A1 (en) * | 2015-06-29 | 2017-01-05 | 株式会社荏原製作所 | Metal detection sensor and metal detection method using same |
| JP2017015451A (en) * | 2015-06-29 | 2017-01-19 | 株式会社荏原製作所 | Metal detection sensor and method of detecting metal using the same |
| KR20180021802A (en) * | 2015-06-29 | 2018-03-05 | 가부시키가이샤 에바라 세이사꾸쇼 | METAL DETECTION SENSOR AND METAL DETECTING METHOD USING THE SENSOR |
| US10739488B2 (en) | 2015-06-29 | 2020-08-11 | Ebara Corporation | Metal detection sensor and metal detection method using same |
| JP2018146323A (en) * | 2017-03-03 | 2018-09-20 | 宮城県 | Foreign substance inspection device |
| JP6425108B1 (en) * | 2018-07-04 | 2018-11-21 | 株式会社先磁研 | metal detector |
| JP2020008336A (en) * | 2018-07-04 | 2020-01-16 | 株式会社先磁研 | Metal detection machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0816703B2 (en) | 1996-02-21 |
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