TW360799B - A sensor for detecting a ferromagnetic object - Google Patents
A sensor for detecting a ferromagnetic objectInfo
- Publication number
- TW360799B TW360799B TW087108582A TW87108582A TW360799B TW 360799 B TW360799 B TW 360799B TW 087108582 A TW087108582 A TW 087108582A TW 87108582 A TW87108582 A TW 87108582A TW 360799 B TW360799 B TW 360799B
- Authority
- TW
- Taiwan
- Prior art keywords
- magnetic field
- ferromagnetic object
- magnetic
- ferromagnetic
- permanent magnet
- Prior art date
Links
Landscapes
- Measuring Magnetic Variables (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Geophysics And Detection Of Objects (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
A ferromagnetic object passage sensor has a permanent magnet and a horizontal magnetic field magnetosensitive device for detecting a magnetic field parallel to a device service thereof, the permanent magnet and the horizontal magnetic field magnetosensitive device being mounted on a holder having a through a hole for passage of a ferromagnetic object to be detected. The magnetosensitive device is disposed substantially parallel to the magnetic pole surface of the permanent magnet and given a magnetic bias for producing a saturated out put signal due to a magnetic field distribution parallel to the magnetic pole service of the permanent magnetic upon absent of ferromagnetic the object when the magnetic field distribution is changed by the passage of the ferromagnetic object. The ferromagnetic object passage sensor can be deigned with increased freedom, and is prevented from operating in error due to an external magnetic field.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18608597A JPH1123724A (en) | 1997-06-27 | 1997-06-27 | Sensor for ferromagnetic object transit |
Publications (1)
Publication Number | Publication Date |
---|---|
TW360799B true TW360799B (en) | 1999-06-11 |
Family
ID=16182120
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW087108582A TW360799B (en) | 1997-06-27 | 1998-05-29 | A sensor for detecting a ferromagnetic object |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPH1123724A (en) |
TW (1) | TW360799B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5241200B2 (en) * | 2007-10-30 | 2013-07-17 | 双日マシナリー株式会社 | Magnetic detection method |
-
1997
- 1997-06-27 JP JP18608597A patent/JPH1123724A/en active Pending
-
1998
- 1998-05-29 TW TW087108582A patent/TW360799B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
JPH1123724A (en) | 1999-01-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM4A | Annulment or lapse of patent due to non-payment of fees |