JPS61172079A - Hall sensor - Google Patents
Hall sensorInfo
- Publication number
- JPS61172079A JPS61172079A JP59049740A JP4974084A JPS61172079A JP S61172079 A JPS61172079 A JP S61172079A JP 59049740 A JP59049740 A JP 59049740A JP 4974084 A JP4974084 A JP 4974084A JP S61172079 A JPS61172079 A JP S61172079A
- Authority
- JP
- Japan
- Prior art keywords
- hall
- permanent magnet
- magnetic
- pole
- magnetic pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/07—Hall effect devices
Landscapes
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明は磁気検出時にオン動作するような磁気近接スイ
ッチに用いるホールセンサに関するものである。 。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a Hall sensor used in a magnetic proximity switch that turns on when detecting magnetism. .
従来のこの種のホールセンサとしては第1図に示すよう
に基板+1)に配設した点状のホール素子、(2)を内
蔵したFrW4ホールIC(31をケース(4)内に収
納したものや、或いは第2図に示すようにホールIC(
3)の磁気検出面(5)の反対側0面に一部が接触する
ようにケース(4)内に略コ字形のヨーク(5)を配設
して感度を高めたものがあるが、しかしながら、上記の
構成では大幅に感度を高めたり、逆に大幅に感度を低く
することは不可能で、仮シに第2図に示すようなヨーク
(5)を用いたとしても感度の大幅々変更は無理であっ
た。尚図中(6)は検出用永久磁石であゐ。As shown in Fig. 1, a conventional Hall sensor of this type includes a dot-shaped Hall element arranged on a substrate +1), and an FrW4 Hall IC (31) containing a built-in (2) housed in a case (4). Or, as shown in Figure 2, Hall IC (
There are devices that increase sensitivity by arranging a substantially U-shaped yoke (5) inside the case (4) so that a portion of the magnetic detection surface (5) in 3) comes into contact with the 0 surface opposite to the magnetic detection surface (5). However, with the above configuration, it is impossible to significantly increase or decrease the sensitivity, and even if a yoke (5) as shown in Figure 2 is used, the sensitivity will be significantly Changes were impossible. Note that (6) in the figure is a permanent magnet for detection.
本発明は上述の問題点に鑑みて為されたもので、その目
的とするところは複雑な形状のヨークを用いることなく
、非常に高感度又は非常に低感度のものを容易忙得られ
る構造を有したホールセンサを提供するにある。The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a structure that can easily achieve very high sensitivity or very low sensitivity without using a yoke with a complicated shape. The present invention provides a Hall sensor having the following characteristics.
(実施例1)
第3図は実施例1の構成を示し、該実施例は感度を低く
するためのもので、バイアス用永久磁石(7)をホール
ICt3)の磁気検出面(4)の反対側面に貼設してあ
シ、ホールIC(31側のバイアス用永久磁石(7)の
磁極は検出用永久磁石(6)の検出磁極(例えばN極)
と同一磁極としている。(Example 1) Figure 3 shows the configuration of Example 1. This example is for lowering the sensitivity, and the bias permanent magnet (7) is placed opposite the magnetic detection surface (4) of the Hall ICt3). The magnetic pole of the bias permanent magnet (7) on the side of the Hall IC (31 side) is the detection magnetic pole (for example, N pole) of the detection permanent magnet (6).
The same magnetic pole is used.
しかしてホーIL/I C(31の中心では第4図に示
すようにバイアス用永久磁石(7)による磁束が破線の
矢印で示される如く流れ、ホールIC!31の動作磁束
と逆方向となる。この為ホールIC[3)の動作ガウス
をa1バイアス用永久磁石(7)によるホールIC(3
)中心の磁束をbとすれば、検出用永久磁石(6)によ
ってa+bの磁束密度が必要になる。つまシ低感度と力
るのである。At the center of the Hall IC (31), as shown in Figure 4, the magnetic flux due to the bias permanent magnet (7) flows as indicated by the dashed arrow, and is in the opposite direction to the operating magnetic flux of the Hall IC!31. For this reason, the operation Gauss of the Hall IC [3] is controlled by the a1 bias permanent magnet (7).
) If the magnetic flux at the center is b, a magnetic flux density of a+b is required by the detection permanent magnet (6). This is due to the low sensitivity of the tabs.
(実施例2)
第5図は本実施例を示しており、本実施例ではバイアス
用永久磁石(7)のホールIC(31に対向する磁極を
検出磁極(例えばN極)とは異なる磁極、S極としであ
る。(Example 2) FIG. 5 shows this example. In this example, the magnetic pole opposite to the Hall IC (31) of the bias permanent magnet (7) is detected as a magnetic pole different from the magnetic pole (for example, N pole), This is the S pole.
しかして本実施例ではバイアス用永久磁石(7)による
磁束は第6図に示すように破線の矢印の如く流れ、ホー
ルIC(3)の動作磁束と同方向となる。In this embodiment, however, the magnetic flux generated by the bias permanent magnet (7) flows as shown by the broken line arrow in FIG. 6, and is in the same direction as the operating magnetic flux of the Hall IC (3).
この為ホールIC+31の動作ガウスをa1バイアス用
永久磁石(7)によるホールIC+31の中心の磁束を
bとすれば検出用永久磁石(6)によりa−bの磁束密
度を供給するだけで動作するようになる。つまり高感度
となるのである。For this reason, if the operating Gauss of the Hall IC+31 is a1, and the magnetic flux at the center of the Hall IC+31 due to the bias permanent magnet (7) is b, then the operation can be made by simply supplying the magnetic flux density of a-b using the detection permanent magnet (6). become. In other words, it has high sensitivity.
(実施例3)
本実施例は第7図に示すように複数枚の永久磁石(7a
)、(7b)を重ねてバイアス用磁石(7)′を構成し
たもので、枚数によ!1lI8度を調整できるようにな
っている。(Example 3) This example uses a plurality of permanent magnets (7a
), (7b) are stacked to form a bias magnet (7)', depending on the number of magnets! It is possible to adjust 1lI8 degrees.
尚各実施例に用いる永久磁石(7)、(7a)、(7b
)hしてはフェライト磁石、ゴム磁石等各種の磁石を使
用できる。Permanent magnets (7), (7a), (7b) used in each example
) Various types of magnets such as ferrite magnets and rubber magnets can be used.
末完F!Aはホール素子を内蔵したホールICの磁気検
出面と反対側にバイアス用磁石を配設したので、バイア
ス用磁石のホールIC側に向ける磁極を適宜調整するだ
けで、感度を高感度にも低感度にも大幅に変更でき、し
かも複雑な形状の3−クーも不要であるという効果を奏
する。Final F! In A, the bias magnet is placed on the opposite side of the magnetic detection surface of the Hall IC with a built-in Hall element, so just by adjusting the magnetic pole of the bias magnet facing the Hall IC side, the sensitivity can be set to high or low. The sensitivity can be changed significantly, and there is no need for a 3-couple having a complicated shape.
第1図、第2図は夫々従来例の断面図、第3図は本発明
の実施例1の断面図、47J4図は同上の動作説明図、
第5図は本発明の実施例2の断面図、第6図は同上の動
作説明図、第7図は本発明の実施例3の断面図であり、
(21&1ホール素子、(3)はホールIC,+51は
磁気検出面、+7) 、 (7a) 、 (7b)はバ
イアス用永久磁石である。
代理人 弁理士 石 1)長 七
@1図 第2図
手続補正書(自発)
1.事件の表示
昭和59年特許願第49740号
2、発 明 の名称
ホールセンサ
3、補正をする者
事件との関係 特 許出願人
住 所 大阪府門真市大字門真1048番地名 称
(583)松下電工株式会社
代表者小 林 郁
4、代理人
5、補正命令の日付
自発
6、補正により増加する発明の数
訂正書
願書番号 特願昭59−49740号
1、本願明細書第2頁第8行及び第12行の「ヨーク(
5)」を夫々「ヨーク(8)」と訂正する。
2、同上第3頁第5行の「磁気検出面(4)」を「磁気
検出面(5月と訂正する。
3、同上第4頁第9行の「なるのである、」の次に下記
の文を挿入する。
「ただしa>bとなる様に磁石を選ぶ、っまりaくbと
なると初期で動作状態となってしまうからである。」
4、図面中第1図、第2図、第4図を別紙のように訂正
する。1 and 2 are sectional views of the conventional example, FIG. 3 is a sectional view of Embodiment 1 of the present invention, and 47J4 is an explanatory diagram of the same operation,
FIG. 5 is a sectional view of Embodiment 2 of the present invention, FIG. 6 is an explanatory diagram of the same operation as above, and FIG. 7 is a sectional view of Embodiment 3 of the present invention.
(21 & 1 Hall element, (3) is a Hall IC, +51 is a magnetic detection surface, +7), (7a), (7b) are permanent magnets for bias. Agent Patent Attorney Ishi 1) Chief 7 @ Figure 1 Figure 2 Procedural Amendment (Voluntary) 1. Display of the case 1983 Patent Application No. 497402, name of the invention Hall sensor 3, person making the amendment Relationship to the case Patent applicant address 1048 Kadoma, Kadoma City, Osaka Prefecture Name (583) Matsushita Electric Works Co., Ltd. Representative Iku Kobayashi 4, Agent 5, Date of amendment order Voluntary 6, Number of inventions to be increased by amendment Application number: Japanese Patent Application No. 59-49740 No. 1, page 2, line 8 of the specification of the present application; In line 12, “Yoke (
5)" are respectively corrected as "Yoke (8)". 2. "Magnetic detection surface (4)" on page 3, line 5 of the same as above is corrected to "magnetic detection surface (May)." 3. After "Naru no deru" on page 4, line 9 of the same as above, the following is written: Insert the following sentence. ``However, choose a magnet so that a>b, because if a exceeds b, it will be in the operating state at the initial stage.'' 4. Figures 1 and 2 in the drawings. , Figure 4 is corrected as shown in the attached sheet.
Claims (3)
反対側にバイアス用磁石を配設したことを特徴とするホ
ールセンサ。(1) A Hall sensor characterized in that a bias magnet is disposed on the side opposite to the magnetic detection surface of a Hall IC with a built-in Hall element.
に向けたバイアス用磁石を備えたことを特徴とする特許
請求の範囲第1項記載のホールセンサ。(2) The Hall sensor according to claim 1, further comprising a bias magnet with the same magnetic pole as the detection magnetic pole of the Hall IC facing toward the Hall IC.
側に向けたバイアス用磁石を備えたことを特徴とする特
許請求の範囲第1項記載のホールセンサ。(3) Connect the magnetic pole different from the detection magnetic pole of the Hall IC to the Hall IC.
The Hall sensor according to claim 1, further comprising a bias magnet directed toward the side.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59049740A JPS61172079A (en) | 1984-03-14 | 1984-03-14 | Hall sensor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP59049740A JPS61172079A (en) | 1984-03-14 | 1984-03-14 | Hall sensor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS61172079A true JPS61172079A (en) | 1986-08-02 |
Family
ID=12839580
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP59049740A Pending JPS61172079A (en) | 1984-03-14 | 1984-03-14 | Hall sensor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS61172079A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4846048A (en) * | 1986-04-29 | 1989-07-11 | Niels Hvilsted | Hydraulic cylinder with piston and with a magnetic device for piston position determination |
US5477675A (en) * | 1989-02-17 | 1995-12-26 | Nartron Corporation | Fluid power assist method and apparatus |
JP2008507805A (en) * | 2004-07-27 | 2008-03-13 | ユニバーシティー オブ トロント | Adjustable magnetic switch |
WO2016031261A1 (en) * | 2014-08-26 | 2016-03-03 | Tdk株式会社 | Magnetic position detection device |
-
1984
- 1984-03-14 JP JP59049740A patent/JPS61172079A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4846048A (en) * | 1986-04-29 | 1989-07-11 | Niels Hvilsted | Hydraulic cylinder with piston and with a magnetic device for piston position determination |
US5477675A (en) * | 1989-02-17 | 1995-12-26 | Nartron Corporation | Fluid power assist method and apparatus |
JP2008507805A (en) * | 2004-07-27 | 2008-03-13 | ユニバーシティー オブ トロント | Adjustable magnetic switch |
WO2016031261A1 (en) * | 2014-08-26 | 2016-03-03 | Tdk株式会社 | Magnetic position detection device |
CN106461418A (en) * | 2014-08-26 | 2017-02-22 | Tdk株式会社 | Magnetic position detection device |
JPWO2016031261A1 (en) * | 2014-08-26 | 2017-06-08 | Tdk株式会社 | Magnetic position detector |
EP3187832A4 (en) * | 2014-08-26 | 2018-04-04 | TDK Corporation | Magnetic position detection device |
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