JPH0524059Y2 - - Google Patents
Info
- Publication number
- JPH0524059Y2 JPH0524059Y2 JP3452485U JP3452485U JPH0524059Y2 JP H0524059 Y2 JPH0524059 Y2 JP H0524059Y2 JP 3452485 U JP3452485 U JP 3452485U JP 3452485 U JP3452485 U JP 3452485U JP H0524059 Y2 JPH0524059 Y2 JP H0524059Y2
- Authority
- JP
- Japan
- Prior art keywords
- yoke
- gear
- magnetic
- permanent magnet
- yokes
- 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
- 238000001514 detection method Methods 0.000 claims description 11
- 230000004907 flux Effects 0.000 description 4
- 230000035945 sensitivity Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 230000006698 induction Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
Landscapes
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
【考案の詳細な説明】
本考案は、回転系の軸に取り付けられた軟磁性
の歯車の歯先有無を検知し歯数を計測する計測装
置に適用して好適な回転系の回転数を検出する歯
車センサに関する。[Detailed description of the invention] The present invention is suitable for detecting the rotation speed of a rotating system by being applied to a measuring device that measures the number of teeth by detecting the presence or absence of the tooth tip of a soft magnetic gear attached to the shaft of a rotating system. related to gear sensors.
従来この種の歯車センサには、光方式あるいは
磁気誘導を用いる方式等がある。前者は寿命とコ
ストの面で後者に劣る。後者の従来の磁気誘導型
センサは、例えば第１図に示す如く、磁石１と鉄
芯２を接続し、鉄芯２の周囲にコイル３を巻回
し、鉄芯中の磁束量を直接コイル３で検知し、そ
の誘導起電圧を計測することにより、歯車４の歯
先をセンシングするものである。 Conventionally, this type of gear sensor includes an optical type or a type using magnetic induction. The former is inferior to the latter in terms of lifespan and cost. The latter conventional magnetic induction sensor, for example, as shown in FIG. The tip of the tooth of the gear 4 is sensed by detecting it and measuring the induced electromotive voltage.
この場合、従来のセンサによれば、永久磁石１
の漏洩が大きいと、鉄芯２中の磁束変化が少な
く、検出感度が低い等の欠点がある。 In this case, according to the conventional sensor, the permanent magnet 1
If the leakage is large, there are disadvantages such as a small change in magnetic flux in the iron core 2 and low detection sensitivity.
本考案はかかる点に鑑み、従来の歯車センサの
欠点を除去するために、断面Ｅ字状のヨークの中
央のヨークに検出コイルを巻回し、左右のヨーク
と上記中央のヨークとの間に回転自在の永久磁石
を設け、上記各ヨークと永久磁石とで磁気回路を
構成することにより、漏洩磁束を除去し、歯車の
高速回転検出感度を向上した歯車センサを提案す
ることを主たる目的とする。 In view of this, in order to eliminate the drawbacks of conventional gear sensors, the present invention has been developed by winding a detection coil around the center yoke of an E-shaped cross-sectional yoke, and rotating it between the left and right yokes and the center yoke. The main purpose of this invention is to propose a gear sensor that eliminates leakage magnetic flux and improves the high-speed rotation detection sensitivity of gears by providing a freely adjustable permanent magnet and configuring a magnetic circuit with each of the yokes and permanent magnets.
以下本考案の一実施例について図面を参照しな
がら詳細に説明する。 An embodiment of the present invention will be described in detail below with reference to the drawings.
第２図は本考案の一例を示す断面図である。６
は断面Ｅ字状の軟磁性鉄芯（ヨーク）を示し、そ
の中央にはコイル７が巻回されている。そしてコ
イル７が巻かれた軟磁性体たるヨーク６と、歯車
１０の歯先に近接して回転するように構成した永
久磁石８とにより、磁気回路を構成し、磁性体た
る歯車１０の位置により変化する磁路に対して、
永久磁石８が回転するように配置したものであ
る。永久磁石１０の矢印は磁化方向を示してい
る。 FIG. 2 is a sectional view showing an example of the present invention. 6
shows a soft magnetic iron core (yoke) with an E-shaped cross section, and a coil 7 is wound around the center of the soft magnetic iron core (yoke). The yoke 6, which is a soft magnetic material around which the coil 7 is wound, and the permanent magnet 8, which is configured to rotate close to the tooth tips of the gear 10, constitute a magnetic circuit, and the position of the gear 10, which is a magnetic material, constitutes a magnetic circuit. For the changing magnetic path,
The permanent magnet 8 is arranged to rotate. The arrow of the permanent magnet 10 indicates the magnetization direction.
次に本考案の動作原理を説明すると、まず第３
図に示す如く、歯車１０の歯先１１がヨーク６に
近付いたときは、両側のヨーク６ａ，６ｂ→歯車
１０の歯先１１→永久磁石８→中央のヨーク６ｃ
のように磁力線が生じることになるが、このと
き、磁力線の作用によつて永久磁石８の磁化方向
が変更されて回転するので、一層磁力線が強くな
る。従つて、コイル７の巻いてある中央のヨーク
部６ｃの磁束の変化が大きく、検出コイル７の起
電圧も大きくなる。 Next, to explain the operating principle of the present invention, first, the third
As shown in the figure, when the tooth tip 11 of the gear 10 approaches the yoke 6, the yokes 6a, 6b on both sides → the tooth tip 11 of the gear 10 → the permanent magnet 8 → the central yoke 6c
Lines of magnetic force are generated as shown in the figure, but at this time, the direction of magnetization of the permanent magnet 8 is changed and rotated by the action of the lines of magnetic force, so that the lines of magnetic force become even stronger. Therefore, the change in the magnetic flux of the central yoke portion 6c around which the coil 7 is wound is large, and the electromotive force of the detection coil 7 is also large.
一方、第４図に示す如く、歯車１０の歯先がヨ
ーク６に位置していないときは、左右のヨーク６
ａ，６ｂ→永久磁石８の循環回路が形成され、コ
イル７の巻いてある中央のヨーク６ｃ内には磁束
が流れなくなる。このように本考案の回転検出セ
ンサは、検出感度が高く、また磁気回路の漏洩も
少なくなる。 On the other hand, as shown in FIG. 4, when the tooth tip of the gear 10 is not located in the yoke 6,
A, 6b→permanent magnet 8 circulation circuit is formed, and magnetic flux no longer flows in the central yoke 6c around which the coil 7 is wound. As described above, the rotation detection sensor of the present invention has high detection sensitivity and also reduces leakage of the magnetic circuit.
以上述べたごとく本考案によれば、断面Ｅ字状
のヨークの中央ヨークに検出コイルを巻回し、左
右のヨークと上記中央のヨークとの間に回転自在
の永久磁石を設け、上記各ヨークと永久磁石とで
磁気回路を構成したので、
検出感度が高く、また磁気回路の漏洩が少ない
という利点を持った回転検出用の歯車センサの提
供が可能となる。 As described above, according to the present invention, a detection coil is wound around the central yoke of the yoke having an E-shaped cross section, and rotatable permanent magnets are provided between the left and right yokes and the central yoke, and each of the yokes and Since the magnetic circuit is configured with a permanent magnet, it is possible to provide a gear sensor for rotation detection that has the advantages of high detection sensitivity and low leakage of the magnetic circuit.
第１図は従来の歯車センサの例を示す図、第２
図は本考案の一例を示す断面図、第３図及び第４
図は本考案の動作の説明に供する図である。
６……ヨーク、６ｃ……中央のヨーク、７……
検出コイル、８……永久磁石。
Figure 1 shows an example of a conventional gear sensor, Figure 2 shows an example of a conventional gear sensor.
The figure is a sectional view showing an example of the present invention, Figures 3 and 4.
The figure is a diagram for explaining the operation of the present invention. 6...Yoke, 6c...Central yoke, 7...
Detection coil, 8...Permanent magnet.
Claims (1)
を巻回し、左右のヨークと上記中央のヨークとの
間に回転自在の永久磁石を設け、上記各ヨークと
永久磁石とで磁気回路を構成したことを特徴とす
る歯車センサ。 A detection coil is wound around the central yoke of a yoke having an E-shaped cross section, rotatable permanent magnets are provided between the left and right yokes and the central yoke, and each of the yokes and the permanent magnets constitute a magnetic circuit. A gear sensor featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3452485U JPH0524059Y2 (en) | 1985-03-11 | 1985-03-11 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3452485U JPH0524059Y2 (en) | 1985-03-11 | 1985-03-11 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61149823U JPS61149823U (en) | 1986-09-16 |
| JPH0524059Y2 true JPH0524059Y2 (en) | 1993-06-18 |
Family
ID=30537975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3452485U Expired - Lifetime JPH0524059Y2 (en) | 1985-03-11 | 1985-03-11 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0524059Y2 (en) |
-
1985
- 1985-03-11 JP JP3452485U patent/JPH0524059Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61149823U (en) | 1986-09-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3942045A (en) | Speed or angular position electromagnetic transducer | |
| JPH0218693Y2 (en) | ||
| JP2000161989A (en) | Rotation sensor | |
| JPS6110649Y2 (en) | ||
| JPH0524059Y2 (en) | ||
| JPH083183Y2 (en) | Generator | |
| JP2536852Y2 (en) | Rotation sensor | |
| JPS6349948Y2 (en) | ||
| JPH01318901A (en) | Magnetic induction type sensor | |
| JPH0611402A (en) | Torque sensor | |
| JP3814041B2 (en) | Stepping motor with rotor position detection mechanism | |
| JPH084620Y2 (en) | Rotation sensor | |
| JPS6439532A (en) | Load state detection device for shaft | |
| JPH03118435A (en) | Motor-driven power steering apparatus | |
| JPH043356U (en) | ||
| JP2673479B2 (en) | Magnetic bearing device | |
| JPS6433072U (en) | ||
| JPS625660Y2 (en) | ||
| JP2657659B2 (en) | Hybrid type stepping motor with built-in magnetic sensor | |
| SU847452A1 (en) | Thyratron electric motor | |
| JPH0323573Y2 (en) | ||
| JPS6023761U (en) | rotation sensor | |
| JPS629684Y2 (en) | ||
| JPH0393450A (en) | Rotational position detector in motor | |
| JPS635415U (en) |