JPH0373876A - Magnetic detector - Google Patents
Magnetic detectorInfo
- Publication number
- JPH0373876A JPH0373876A JP1210904A JP21090489A JPH0373876A JP H0373876 A JPH0373876 A JP H0373876A JP 1210904 A JP1210904 A JP 1210904A JP 21090489 A JP21090489 A JP 21090489A JP H0373876 A JPH0373876 A JP H0373876A
- Authority
- JP
- Japan
- Prior art keywords
- detection
- pattern
- output
- output terminal
- detection pattern
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 33
- 239000000463 material Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
Landscapes
- Transmission And Conversion Of Sensor Element Output (AREA)
- Measuring Magnetic Variables (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、磁界の変化を抵抗値変化として検出する磁気
抵抗素子を使用した磁気検出器に関するものである
従来の技術
従来、この種の磁気検出器は、第６図に示すような構造
であった。図にかいて、１４は検知パターン、１３は温
度補償パターン、１５．１６は電極端子で、１５金十と
して１５．１８間に定電圧Ｖを印加している。１７は出
力端子、１２は着磁体、１８は素子が検出する磁界であ
る。ここで素子は検知パターン１４によって着磁体１２
より発生する磁界１８を検出し、着磁体１２が検知器に
対して横方向に相対移動すると、第６図のＣに示す出力
電圧を出力端子１７より発生する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a magnetic detector using a magnetoresistive element that detects a change in a magnetic field as a change in resistance value. had a structure as shown in FIG. In the figure, 14 is a detection pattern, 13 is a temperature compensation pattern, 15.16 is an electrode terminal, and a constant voltage V is applied between 15.18 and 15.18. 17 is an output terminal, 12 is a magnetized body, and 18 is a magnetic field detected by the element. Here, the element detects the magnetized body 12 by the detection pattern 14.
When the magnetic field 18 generated by the detector is detected and the magnetized body 12 moves laterally relative to the detector, an output voltage shown at C in FIG. 6 is generated from the output terminal 17.
発明が解決しようとする課題
素子の出力電圧は、検知パターンの材質と素子への印加
電圧によって限界値が決咬ってくるため、このような構
造では、低電圧で高出力が得られなかった。例えばＶ＝
ｔＳボルトでは出力電圧幅は約１２０ｍ’／程度であっ
た。Problem to be Solved by the Invention Since the limit value of the output voltage of the element is determined by the material of the detection pattern and the voltage applied to the element, it was not possible to obtain high output at low voltage with such a structure. . For example, V=
At tS volts, the output voltage width was approximately 120 m'/approximately.
本発明はこのような間留点金解決するもので、低電圧に
より高出力上帯ること金目的とするものである
課題を解決するための手段
この問題金解決するため本発明は、検知パターンに温度
補償用のパターン金直列に接続し、接続部に出力端子金
設けた検出部を２つ近接させかつ各検知パターンにほぼ
同一の磁界が印加されるように配置し、それぞれの電極
に逆方向の電圧を印加することによって１８００位相の
出力電圧を発生させて差動増幅を行なうものである。The present invention aims to solve this problem, and aims to achieve high output with low voltage. A pattern gold for temperature compensation is connected in series with the metal, and two detection parts each having an output terminal metal attached to the connection part are arranged in close proximity and almost the same magnetic field is applied to each detection pattern. By applying voltages in different directions, output voltages of 1800 phases are generated and differential amplification is performed.
作用 この構造により、低電圧で高出力を得ることができる。action This structure allows high output to be obtained at low voltage.
実施例
第１図は本発明の一実施例である。図に釦いて、１は絶
縁基板、２．３は磁界を検出する検知パターンで、はぼ
同一の抵抗値変化が得られる様に近接して配置されてい
る。４．５はそれぞれの検知パターン２，３に対応して
設けた温度補償用パターンで、検知パターン２．３と同
一材質により形成されている。６，７，９，１Ｑは電極
、８，１１は出力端子、１２は着磁体である。ここで、
検知パターン２．温度補償用パターン４．出力端子８に
より第１の検出部が構成され、検知パターン３゜温度補
償用パターン６、出力端子１１によう第２の検出部が構
成されている。このパターンで、電ｌｉｅ 、 １（＋
１Ｖｃｃ、７．９を（、ＨＤに接続し、逆方向の電圧を
印加することにより着磁体１２金移動させた時、出力端
子８より第２図のムの出力が、出力端子１１より第２図
のＢの出力が得られる。Embodiment FIG. 1 shows an embodiment of the present invention. In the figure, 1 is an insulating substrate, 2 and 3 are detection patterns for detecting a magnetic field, and they are arranged close to each other so that almost the same resistance value change can be obtained. 4.5 is a temperature compensation pattern provided corresponding to each of the detection patterns 2 and 3, and is made of the same material as the detection pattern 2.3. 6, 7, 9, and 1Q are electrodes, 8 and 11 are output terminals, and 12 is a magnetized body. here,
Detection pattern 2. Temperature compensation pattern 4. The output terminal 8 constitutes a first detection section, and the detection pattern 3, the temperature compensation pattern 6, and the output terminal 11 constitute a second detection section. With this pattern, electric lie, 1(+
When 1Vcc, 7.9 is connected to the HD and the magnetized body is moved by applying a voltage in the opposite direction, the output from the output terminal 8 as shown in Fig. 2, and the output from the output terminal 11 as shown in Output B in the figure is obtained.
すなわち、それぞれの検出部から１８０°位相のずれた
信号が取シ出され、これを差動増幅回路で増幅すること
により、高レベルの出力が得られる。That is, signals with a phase shift of 180° are extracted from each detection section, and by amplifying these signals with a differential amplifier circuit, a high-level output is obtained.
その池の実施例を第３図、第４図に示す。第３図は温度
補償用パターン４，６と検知パターン２゜３を別々の絶
縁基板１．１′に構成して接続し、同様の出力金得るも
のである。また、第４図の実施例では、第１図の実施例
のものと同様なパターンを絶縁基板１の表裏面に構成し
同様の出力を得るものである。この場合、絶縁基板の表
裏面に形成するのではなく、別々の基板に形成したもの
を積層するようにしてもよい。また、着磁体としては、
回転体に着磁したものであってもよい。Examples of the pond are shown in FIGS. 3 and 4. In FIG. 3, the temperature compensation patterns 4 and 6 and the detection patterns 2 and 3 are constructed and connected to separate insulating substrates 1.1' to obtain a similar output. Further, in the embodiment shown in FIG. 4, a pattern similar to that of the embodiment shown in FIG. 1 is formed on the front and back surfaces of the insulating substrate 1 to obtain a similar output. In this case, instead of forming on the front and back surfaces of the insulating substrate, those formed on separate substrates may be stacked. In addition, as a magnetized body,
It may be a rotating body that is magnetized.
発明の効果
以上のように本発明によれば２つの検出部金近接させて
配置したことにより、低電圧で高出力上帯ることができ
る。Effects of the Invention As described above, according to the present invention, by arranging the two detection parts close to each other, high output can be achieved with low voltage.
第１図は本発明の一実施例による磁気検出器上爪す概略
図、第２図は第１図の構造によシ発生する出力電圧波形
図、第３図、第４図は本発明の池の実施例を示す概略図
、第５図は従来の磁気検出器上爪す概略図、第６図は第
３図の構造により発生する出力電圧波形図である。
１・・・・・・絶縁基板、２，３・・・・検知パターン
、４゜５・・・・・・温度補償用パターン、８，１１・
・・・・・出力端子、１２・・・・・・着磁体。FIG. 1 is a schematic diagram of the upper part of a magnetic detector according to an embodiment of the present invention, FIG. 2 is an output voltage waveform diagram generated by the structure of FIG. 1, and FIGS. FIG. 5 is a schematic diagram showing an embodiment of a conventional magnetic detector, and FIG. 6 is a diagram of an output voltage waveform generated by the structure of FIG. 3. 1...Insulating substrate, 2, 3...Detection pattern, 4゜5...Temperature compensation pattern, 8,11...
...Output terminal, 12...Magnetized body.
Claims (2)
前記検知パターンと同一材質で作成したパターンとを直
列に接続するとともに接続点に出力端子を設けた第１の
検出部と、前記検知パターンとほぼ同一の抵抗値変化が
得られる様に前記検知パターンに近接して配置した検知
パターンと、前記検知パターンと同様に温度補償用のパ
ターンを接続するとともに出力端子を設けた第２の検出
部とを設けたことを特徴とする磁気検出器。(1) A first detection section in which a detection pattern for detecting a magnetic field and a pattern made of the same material as the detection pattern for temperature compensation are connected in series and an output terminal is provided at the connection point, and the detection pattern a detection pattern arranged close to the detection pattern so as to obtain almost the same resistance value change; and a second detection section connected to a temperature compensation pattern similar to the detection pattern and provided with an output terminal. A magnetic detector characterized by being provided with.
に電圧を印加することによって第１、第２の検出部の出
力端子から１８０°位相の出力を取り出し、差動増幅回
路で増幅したことを特徴とする請求項１記載の磁気検出
器。(2) By applying a voltage in the opposite direction between the detection pattern and the temperature compensation pattern, outputs with a 180° phase are taken out from the output terminals of the first and second detection sections, and amplified by a differential amplifier circuit. The magnetic detector according to claim 1, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1210904A JPH0373876A (en) | 1989-08-16 | 1989-08-16 | Magnetic detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1210904A JPH0373876A (en) | 1989-08-16 | 1989-08-16 | Magnetic detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0373876A true JPH0373876A (en) | 1991-03-28 |
Family
ID=16596997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1210904A Pending JPH0373876A (en) | 1989-08-16 | 1989-08-16 | Magnetic detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0373876A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012014546A1 (en) * | 2010-07-30 | 2012-02-02 | 三菱電機株式会社 | Magnetic substance detection device |
-
1989
- 1989-08-16 JP JP1210904A patent/JPH0373876A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012014546A1 (en) * | 2010-07-30 | 2012-02-02 | 三菱電機株式会社 | Magnetic substance detection device |
| CN103038659A (en) * | 2010-07-30 | 2013-04-10 | 三菱电机株式会社 | Magnetic substance detection device |
| JPWO2012014546A1 (en) * | 2010-07-30 | 2013-09-12 | 三菱電機株式会社 | Magnetic detection device |
| JP5474195B2 (en) * | 2010-07-30 | 2014-04-16 | 三菱電機株式会社 | Magnetic detection device |
| US9222993B2 (en) | 2010-07-30 | 2015-12-29 | Mitsubishi Electric Corporation | Magnetic substance detection device |
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