JP2013162065A5 - - Google Patents
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- JP2013162065A5 JP2013162065A5 JP2012024906A JP2012024906A JP2013162065A5 JP 2013162065 A5 JP2013162065 A5 JP 2013162065A5 JP 2012024906 A JP2012024906 A JP 2012024906A JP 2012024906 A JP2012024906 A JP 2012024906A JP 2013162065 A5 JP2013162065 A5 JP 2013162065A5
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- JP
- Japan
- Prior art keywords
- unit
- magnetic field
- shield
- magnetic
- coil
- Prior art date
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- 230000005347 demagnetization Effects 0.000 claims 5
- 238000001514 detection method Methods 0.000 claims 2
- 238000005259 measurement Methods 0.000 claims 1
Claims (7)
前記シールド部の外部の環境に存在する第１磁場に対し、当該第１磁場を打ち消す様に第２磁場を発生するキャンセル部と、
前記シールド部を消磁する消磁部と
を備え、
前記キャンセル部は、前記第１磁場に基づいて前記第２磁場を調整するフィードバック制御と、固定の駆動信号に基づいて前記第２磁場を発生させる保持信号制御と、を行い、
前記消磁部は、前記キャンセル部が前記保持信号制御を行っている際に、前記シールド部を消磁する
ことを特徴とする磁気シールド装置。 A shield part having a space for accommodating the magnetic measurement device;
Relative to the first magnetic field exists outside the environment of the shield portion, and a cancellation unit for generating a second magnetic field so as to cancel the first magnetic field,
A demagnetizing part for demagnetizing the shield part,
The cancel unit performs feedback control for adjusting the second magnetic field based on the first magnetic field, and holding signal control for generating the second magnetic field based on a fixed drive signal,
The demagnetizing unit demagnetizes the shield unit when the cancel unit performs the holding signal control .
前記駆動回路は、前記フィードバック制御の結果、前記第１磁場の計測値と前記第１磁場の目標値との差が閾値以内になった際の駆動状態を保持する保持部を有し、
前記保持信号制御では、前記保持部により保持された駆動状態に基づいて前記コイルが駆動される
ことを特徴とする請求項１に記載の磁気シールド装置。 The cancel unit includes a coil, a sensor that measures the first magnetic field, and a drive circuit that drives the coil.
The drive circuit has a holding unit that holds a drive state when a difference between a measured value of the first magnetic field and a target value of the first magnetic field is within a threshold as a result of the feedback control ,
The magnetic shield device according to claim 1, wherein in the holding signal control, the coil is driven based on a driving state held by the holding unit.
ことを特徴とする請求項２に記載の磁気シールド装置。The magnetic shield device according to claim 2.
を備え、
前記消磁部は、消磁を行っている最中に前記検知部により前記異常が検知された場合には、前記シールド部の消磁をやり直す
ことを特徴とする請求項１に記載の磁気シールド装置。 A detection unit for detecting an abnormality occurring in the environment outside the shield unit;
The degaussing unit, when the abnormality is detected by the detection unit in the middle of performing a demagnetization magnetic shield according to claim 1, characterized in that re-demagnetization of the shield portion.
ことを特徴とする請求項１から４までのいずれか１項に記載の磁気シールド装置。 The magnetic shield device according to any one of claims 1 to 4, wherein a plurality of the cancel units are provided.
前記駆動回路が、前記第１磁場の計測値と前記第１磁場の目標値との差が閾値以内になったときの駆動状態を保持するステップと、
前記駆動回路が、前記駆動状態が保持された場合に、当該駆動状態に基づいて前記コイルを駆動させるステップと、
前記消磁部が、保持された前記駆動状態に基づいて前記コイルが駆動しているときに、前記シールド部を消磁するステップと
を備えることを特徴とする磁気シールド装置の消磁方法。 A shield section having a space for housing the magnetic measuring device, relative to the first magnetic field exists outside the environment of the shield portion, and a cancellation unit for generating a second magnetic field so as to cancel the first magnetic field, the shield portion A magnetic demagnetization unit for demagnetizing the magnetic shield device, wherein the cancellation unit includes a coil, a sensor for measuring the first magnetic field, and a drive circuit for driving the coil .
The driving circuit holding a driving state when a difference between a measured value of the first magnetic field and a target value of the first magnetic field is within a threshold;
When the driving circuit holds the driving state, driving the coil based on the driving state;
A demagnetizing method for a magnetic shield device, comprising: a step of demagnetizing the shield part when the coil is driven based on the held driving state.
前記第１磁場の計測値と前記第１磁場の目標値との差が閾値以内になったときの駆動状態を保持する保持部と、
前記保持部において前記駆動状態が保持された場合に、当該駆動状態に基づいて前記コイルを駆動させる駆動部と、
前記保持部により保持された駆動状態に基づいて前記コイルが駆動しているときに、前記消磁部によって前記シールド部を消磁させる制御部
として機能させるためのプログラム。 A shield section having a space for housing the magnetic measuring device, relative to the first magnetic field exists outside the environment of the shield portion, and a cancellation unit for generating a second magnetic field so as to cancel the first magnetic field, the shield portion A magnetic demagnetization unit for demagnetizing, wherein the cancellation unit includes a coil, a sensor for measuring the first magnetic field, and a computer for driving the coil .
A holding unit that holds a driving state when a difference between the measured value of the first magnetic field and the target value of the first magnetic field is within a threshold;
A driving unit that drives the coil based on the driving state when the driving state is held in the holding unit;
A program for causing the demagnetizing unit to function as a control unit that demagnetizes the shield unit when the coil is driven based on the driving state held by the holding unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012024906A JP5845943B2 (en) | 2012-02-08 | 2012-02-08 | Magnetic shield device, demagnetizing method and program for magnetic shield device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012024906A JP5845943B2 (en) | 2012-02-08 | 2012-02-08 | Magnetic shield device, demagnetizing method and program for magnetic shield device |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2013162065A JP2013162065A (en) | 2013-08-19 |
| JP2013162065A5 true JP2013162065A5 (en) | 2015-03-26 |
| JP5845943B2 JP5845943B2 (en) | 2016-01-20 |
Family
ID=49174048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2012024906A Expired - Fee Related JP5845943B2 (en) | 2012-02-08 | 2012-02-08 | Magnetic shield device, demagnetizing method and program for magnetic shield device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP5845943B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015055520A (en) * | 2013-09-11 | 2015-03-23 | セイコーエプソン株式会社 | Magnetic shield apparatus and magnetic shielding method |
| JP7002416B2 (en) * | 2018-07-03 | 2022-01-20 | 株式会社日立ハイテク | Magnetic field measuring device |
| JP7345297B2 (en) | 2018-07-25 | 2023-09-15 | 三ツ星ベルト株式会社 | conveyor belt |
| JP7479888B2 (en) | 2020-03-23 | 2024-05-09 | Tdk株式会社 | Magnetic Field Detection Device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4197543B2 (en) * | 1997-09-08 | 2008-12-17 | 株式会社東芝 | Environmental magnetic field canceling system and magnetic measuring device |
| JP2011159668A (en) * | 2010-01-29 | 2011-08-18 | Seiko Epson Corp | Active magnetic shield device |
-
2012
- 2012-02-08 JP JP2012024906A patent/JP5845943B2/en not_active Expired - Fee Related
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