JPH0459404U - - Google Patents
Info
- Publication number
- JPH0459404U JPH0459404U JP10155390U JP10155390U JPH0459404U JP H0459404 U JPH0459404 U JP H0459404U JP 10155390 U JP10155390 U JP 10155390U JP 10155390 U JP10155390 U JP 10155390U JP H0459404 U JPH0459404 U JP H0459404U
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- detection sensor
- operating
- detection
- fluid pressure
- 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 description 12
- 239000012530 fluid Substances 0.000 claims description 6
- 238000006073 displacement reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 claims 1
- 230000007257 malfunction Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Actuator (AREA)
Description
第１図は本考案の一実施例である流体圧作動機
器の位置検出装置を流体圧作動機器に実装した状
態を示す概略図、第２図は本実施例の位置検出装
置の回路構成図、第３図ａ〜ｃおよび第４図ａ〜
ｃは本実施例の位置検出装置における外部磁界が
ない場合の動作を示す説明図、第５図ａ〜ｄおよ
び第６図ａ〜ｄは本実施例の位置検出装置におけ
る外部磁界がある場合の動作を示す説明図である
。
１……シリンダ装置（流体圧作動機器）、１ａ
……ピストン（作動部材）、１ｂ……永久磁石、
２……位置検出装置、３……第１検出センサ、４
……第２検出センサ、５……集積回路素子、６…
…基板、７……差動増幅器、８……比較器、９…
…外部シールド。
FIG. 1 is a schematic diagram showing a state in which a position detecting device for a fluid pressure operated device, which is an embodiment of the present invention, is mounted on a fluid pressure operated device, and FIG. 2 is a circuit configuration diagram of the position detecting device according to the present embodiment. Figure 3 a-c and Figure 4 a-
c is an explanatory diagram showing the operation of the position detecting device of this embodiment when there is no external magnetic field, and FIGS. 5 a to d and FIGS. It is an explanatory diagram showing operation. 1... Cylinder device (fluid pressure operated device), 1a
... Piston (operating member), 1b ... Permanent magnet,
2...Position detection device, 3...First detection sensor, 4
...Second detection sensor, 5...Integrated circuit element, 6...
... Board, 7... Differential amplifier, 8... Comparator, 9...
...external shield.
Claims (1)
位置を検出する位置検出装置であつて、前記作動
部材に配設される永久磁石による内部磁界および
外部環境による外部磁界に感応され、前記作動部
材の所定の動作位置に配設される第１検出センサ
と、該第１検出センサに前記作動部材の変位方向
に所定の間隔で配設される第２検出センサとを備
え、前記第１検出センサと第２検出センサとの検
出出力の減算処理により前記外部磁界による影響
が互いに打ち消され、前記第１検出センサが誤動
作することなく所定の動作位置が確実に検出され
ることを特徴とする流体圧作動機器の位置検出装
置。 ２ 前記位置検出装置が外部シールドされ、前記
外部磁界における所定値以上の磁界を遮蔽するこ
とを特徴とする請求項１記載の流体圧作動機器の
位置検出装置。[Claims for Utility Model Registration] 1. A position detection device for detecting the operating position of an operating member housed in a fluid pressure operating device, which includes an internal magnetic field caused by a permanent magnet disposed in the operating member and an external magnetic field caused by an external environment. a first detection sensor that is sensitive to a magnetic field and is disposed at a predetermined operating position of the actuating member; and a second detection sensor that is disposed at a predetermined interval from the first detection sensor in the displacement direction of the actuating member. By subtracting the detection outputs of the first detection sensor and the second detection sensor, the effects of the external magnetic field are mutually canceled out, and the predetermined operating position is reliably detected without malfunction of the first detection sensor. A position detection device for a fluid pressure operated device. 2. The position detecting device for a fluid pressure operated device according to claim 1, wherein the position detecting device is externally shielded to block a magnetic field of a predetermined value or more in the external magnetic field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10155390U JPH0459404U (en) | 1990-09-27 | 1990-09-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10155390U JPH0459404U (en) | 1990-09-27 | 1990-09-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0459404U true JPH0459404U (en) | 1992-05-21 |
Family
ID=31845104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10155390U Pending JPH0459404U (en) | 1990-09-27 | 1990-09-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0459404U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008076193A (en) * | 2006-09-20 | 2008-04-03 | Asahi Kasei Electronics Co Ltd | Position detector, optical system with position detector, and imaging device |
| WO2021084815A1 (en) | 2019-10-29 | 2021-05-06 | Smc株式会社 | Hydraulic cylinder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS526547A (en) * | 1975-07-04 | 1977-01-19 | Denki Onkyo Co Ltd | Magnetic signal reader making use hole head |
-
1990
- 1990-09-27 JP JP10155390U patent/JPH0459404U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS526547A (en) * | 1975-07-04 | 1977-01-19 | Denki Onkyo Co Ltd | Magnetic signal reader making use hole head |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008076193A (en) * | 2006-09-20 | 2008-04-03 | Asahi Kasei Electronics Co Ltd | Position detector, optical system with position detector, and imaging device |
| WO2021084815A1 (en) | 2019-10-29 | 2021-05-06 | Smc株式会社 | Hydraulic cylinder |
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