JP2565824Y2 - Position detector - Google Patents
Position detectorInfo
- Publication number
- JP2565824Y2 JP2565824Y2 JP1984055536U JP5553684U JP2565824Y2 JP 2565824 Y2 JP2565824 Y2 JP 2565824Y2 JP 1984055536 U JP1984055536 U JP 1984055536U JP 5553684 U JP5553684 U JP 5553684U JP 2565824 Y2 JP2565824 Y2 JP 2565824Y2
- Authority
- JP
- Japan
- Prior art keywords
- magnet
- detection
- axis
- sensors
- sensor
- 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 - Lifetime
Links
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
【考案の詳細な説明】
本考案は回転する被位置検出物の位置を磁気センサに
より検出する位置検出器に関する。
従来の位置検出器においては、検出位置とセンサとが
１対１に対応するようにセンサを配置することにより被
位置検出物の位置検出を行なっている。
このように、検出位置とセンサとが１対１に対応する
ようにセンサを配置して位置検出を行なった場合、検出
位置の数が増加すると、センサおよび検出回路の数がそ
れに比例して増加することになる。この結果、回路規模
が大きくなるとともに、そのセンサへの引出線の数も多
くなり、センサ部分の小形化および回路の低消費電流化
を達成できないという欠点がある。
本考案の目的は上述の欠点を除去した検出器を提供す
ることにある。
本考案の検出器は、予め定めた軸の周囲を回転できか
つ該軸方向に移動できる被位置検出物に取り付けた一本
の磁石と、それぞれバイアス用磁石を有し少なくとも前
記一本の磁石の移動領域に対向する平面領域内に配列し
た複数の磁気センサと、該磁気センサの出力を処理する
検出回路とを備えている。
次に本考案について図面を参照して詳細に説明する。
第１図は本考案の一実施例を示す斜視図、第２図は磁
石１が予め定めた軸（図示せず）の周囲を回転（矢印Ａ
方向またはＢ方向）する様子を示す側面図である。図に
おいて、本実施例は、予め定めた軸の周囲を回転できか
つ該軸方向に移動できる被位置検出物に取り付けたある
限られた大きさの一本の棒状磁石１と、それぞれバイア
ス用磁石８〜13を有し少なくとも磁石１の移動領域に対
向する平面領域内に配列した複数の磁気センサ２〜７
と、センサ２〜７からの出力を処理する検出回路（第４
図（ｂ））とから構成される。
本実施例に用いる各磁気センサとして磁気抵抗効果素
子を用いた例を第４図を参照して説明する。
第４図（ａ）に示すように、磁気センサ21は、シリコ
ン単結晶やガラス等の基板上に磁気抵抗効果素子25〜28
を蒸着したものであり、通常、矢印23方向の磁界がバイ
アス磁石により印加されているため素子27および28の抵
抗値Ｒ2およびＲ3が減少し、第４図（ｂ）のコンパレー
タ29の出力24は低レベルとなる。しかしながら、磁石１
が接近し、矢印23と直交する矢印22方向に磁界が印加さ
れると素子25および26の抵抗値Ｒ1およびＲ2が減少し、
コンパレータ29の出力24は高レベルとなる。
本実施例において、軸方向に対しては、「センサ2,3
および４が全て検出状態」，「センサ３および４が検出
状態」，「センサ４だけが検出状態」および「センサ2,
3および４が全て非検出状態」の４通り、回転方向に対
しては、「センサ５だけが検出状態」，「センサ５およ
び６が検出状態」，「センサ６だけが検出状態」，「セ
ンサ６および７が検出状態」および「センサ７だけが検
出状態」の５通りがあり、これらの組合せにより４×５
＝20通りすなわち20箇所の磁石１の位置の検出ができ
る。この20通りのパターンの位置状態における各センサ
の状態（“1"は検出状態を示す）を第３図に示す。
以上、本考案には、被位置検出物の回転方向における
多数の位置の検出を少数のセンサにより行なえるという
効果がある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a position detector for detecting the position of a rotating object to be detected by a magnetic sensor. In a conventional position detector, the position of an object to be detected is detected by arranging the sensors such that the detection positions and the sensors correspond one-to-one. As described above, when position detection is performed by disposing the sensors so that the detection positions correspond one-to-one with the sensors, when the number of detection positions increases, the numbers of sensors and detection circuits increase in proportion thereto. Will do. As a result, the circuit scale is increased, and the number of lead wires to the sensor is increased, so that there is a disadvantage that the sensor cannot be downsized and the current consumption of the circuit cannot be reduced. It is an object of the present invention to provide a detector that eliminates the above-mentioned disadvantages. The detector of the present invention has one magnet attached to a position detection object that can rotate around a predetermined axis and can move in the axial direction, and each has a magnet for bias, and at least one of the magnets The apparatus includes a plurality of magnetic sensors arranged in a plane area facing the moving area, and a detection circuit for processing an output of the magnetic sensors. Next, the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a diagram in which a magnet 1 rotates around a predetermined axis (not shown) (arrow A).
FIG. 9 is a side view showing a state in which the direction (direction B or the direction B) changes. In this figure, the present embodiment is a rod magnet 1 of a limited size attached to an object to be detected which can rotate around a predetermined axis and can move in the axial direction, and a bias magnet respectively. A plurality of magnetic sensors 2 to 7 arranged in a plane region facing at least the moving region of the magnet 1
And a detection circuit for processing the outputs from the sensors 2 to 7 (fourth
(B) of FIG. An example in which a magnetoresistive element is used as each magnetic sensor used in this embodiment will be described with reference to FIG. As shown in FIG. 4 (a), the magnetic sensor 21 includes a magnetoresistive element 25 to 28 on a substrate such as silicon single crystal or glass.
The resistance values R 2 and R 3 of the elements 27 and 28 decrease because the magnetic field in the direction of the arrow 23 is normally applied by the bias magnet, and the output of the comparator 29 in FIG. 24 is low level. However, magnet 1
Approach, and when a magnetic field is applied in the direction of arrow 22 perpendicular to arrow 23, the resistances R 1 and R 2 of elements 25 and 26 decrease,
The output 24 of the comparator 29 goes high. In the present embodiment, the “sensors 2 and 3”
And 4 are all in the detection state "," Sensors 3 and 4 are in the detection state "," Only Sensor 4 is in the detection state ", and" Sensor 2,
With respect to the rotational direction, "only the sensor 5 is in the detection state", "the sensors 5 and 6 are in the detection state", "only the sensor 6 is in the detection state", and 6 and 7 are in the detection state "and" only the sensor 7 is in the detection state ".
= 20 ways, that is, 20 positions of the magnet 1 can be detected. FIG. 3 shows the state of each sensor ("1" indicates the detection state) in the position states of these 20 patterns. As described above, the present invention has an effect that a large number of positions in the rotation direction of the detected object can be detected by a small number of sensors.
【図面の簡単な説明】
第１図は本考案の一実施例を示す斜視図、第２図は磁石
１の動きを示す側面図、第３図は本実施例が検出できる
位置状態を示す図ならびに第４図（ａ）および（ｂ）は
それぞれ磁気センサおよび検出回路を示す図である。
図において、１……棒状磁石、２〜7,21……磁気セン
サ、８〜13……バイアス磁石、22,23……磁界、24……
出力端子、25〜28……磁気抵抗効果素子、29……コンパ
レータ。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a side view showing movement of a magnet 1, and FIG. 3 is a view showing a position state in which the embodiment can be detected. FIGS. 4A and 4B show a magnetic sensor and a detection circuit, respectively. In the figure, 1 ... rod-shaped magnet, 2 to 7, 21 ... magnetic sensor, 8 to 13 ... bias magnet, 22, 23 ... magnetic field, 24 ...
Output terminals, 25 to 28: magnetoresistive element, 29: comparator.
───────────────────────────────────────────────────── フロントページの続き (72)考案者 高野 秀博 日野市日野台３丁目１番地１ 日野自動 車工業株式会社内 (72)考案者 小池 哲夫 日野市日野台３丁目１番地１ 日野自動 車工業株式会社内 (56)参考文献 特開 昭57−165702（ＪＰ，Ａ) 特開 昭59−24210（ＪＰ，Ａ) 特開 昭59−48602（ＪＰ，Ａ) 特開 昭59−168381（ＪＰ，Ａ) 特開 昭58−72001（ＪＰ，Ａ) ────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Hidehiro Takano 3-1-1 Hinodai, Hino City 1 Hino Automatic Inside the car industry (72) Inventor Tetsuo Koike 3-1-1 Hinodai, Hino City 1 Hino Automatic Inside the car industry (56) References JP-A-57-165702 (JP, A) JP-A-59-24210 (JP, A) JP-A-59-48602 (JP, A) JP-A-59-168381 (JP, A) JP-A-58-72001 (JP, A)
Claims (1)
できる被位置検出物に取り付けた一本の磁石と、 それぞれバイアス用磁石を少なくとも前記一本の磁石の
移動領域に対向する平面領域内にあって、前記軸の周囲
の円周方向と前記軸に平行な方向にそれぞれ複数配列さ
れた複数の磁気センサと、 前記各磁気センサで検出される出力の組合せにより検出
パターンを定めて該検出パターンに基づいて前記軸の周
囲の円周方向と前記軸方向の位置を検出する検出回路と を備えたことを特徴とする位置検出器。(57) [Rules for requesting registration of utility model] One magnet attached to a position detection object that can rotate around a predetermined axis and move in the axial direction, and each bias magnet is placed in a plane area facing at least the movement area of the one magnet. A plurality of magnetic sensors arranged in a plurality in a circumferential direction around the axis and in a direction parallel to the axis; and a detection pattern determined by a combination of outputs detected by the magnetic sensors. A position detector comprising: a detection circuit that detects a position in a circumferential direction around the axis and a position in the axial direction based on the position information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984055536U JP2565824Y2 (en) | 1984-04-16 | 1984-04-16 | Position detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1984055536U JP2565824Y2 (en) | 1984-04-16 | 1984-04-16 | Position detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60168005U JPS60168005U (en) | 1985-11-07 |
| JP2565824Y2 true JP2565824Y2 (en) | 1998-03-25 |
Family
ID=30578301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1984055536U Expired - Lifetime JP2565824Y2 (en) | 1984-04-16 | 1984-04-16 | Position detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2565824Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5014968B2 (en) * | 2007-12-07 | 2012-08-29 | 株式会社東海理化電機製作所 | Position sensor |
| US8018353B2 (en) * | 2008-05-09 | 2011-09-13 | Omron Scientic Technologies, Inc. | Method and apparatus for zone selection in area monitoring devices |
| JP2010243287A (en) * | 2009-04-03 | 2010-10-28 | Tokai Rika Co Ltd | Shift position detection device of vehicle |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2214890B1 (en) * | 1973-01-18 | 1976-04-09 | Europ Propulsion | |
| JPS5821102A (en) * | 1981-07-30 | 1983-02-07 | Matsushita Electric Ind Co Ltd | Detector for rate of displacement |
| JPS58173404A (en) * | 1982-04-06 | 1983-10-12 | Matsushita Electric Ind Co Ltd | Detector of radial position |
| JPS5924210A (en) * | 1982-07-30 | 1984-02-07 | Sony Magnescale Inc | Magnetic head |
| JPS5948602A (en) * | 1982-09-14 | 1984-03-19 | Toshiba Corp | Position detector |
-
1984
- 1984-04-16 JP JP1984055536U patent/JP2565824Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60168005U (en) | 1985-11-07 |
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