JP5091468B2 - 渦電流センサおよび同センサのセンサ・コイル - Google Patents
渦電流センサおよび同センサのセンサ・コイル Download PDFInfo
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- JP5091468B2 JP5091468B2 JP2006325295A JP2006325295A JP5091468B2 JP 5091468 B2 JP5091468 B2 JP 5091468B2 JP 2006325295 A JP2006325295 A JP 2006325295A JP 2006325295 A JP2006325295 A JP 2006325295A JP 5091468 B2 JP5091468 B2 JP 5091468B2
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- sensor
- coil
- eddy current
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
- G01D5/2006—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
- G01D5/202—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils by movable a non-ferromagnetic conductive element
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
Claims (12)
- 検査対象(5)内に渦電流を生成する手段を有するセンサ回路と、渦電流を検出するセンサ・コイル(4)を有し、このセンサ回路は、センサ・コイル(4)と、ベース部分(2)と、ヘッド部分(1)をベース部分(2)に接続するケーブル(3)とからなる渦電流センサであって、
ケーブル(3)は、中心導体(10)、内側シールド(11)、外側シールド(12)を有する3軸ケーブルであり、センサ・コイル(4)は、中心導体(10)と外側シールド(12)との間で接続され、センサ回路のベース部分(2)は、ケーブル(3)の線路容量をセンサ・コイル(4)から分離する中心導体(10)と内側シールド(11)との間で接続された電圧フォロワ(13)を有していることを特徴とする渦電流センサ。 - 請求項1記載の渦電流センサにおいて、センサ回路は、検査対象(5)に渦電流を生成するセンサ・コイル(4)に交流電流を供給するように配置され発振器(6、6’)を備えることを特徴とする渦電流センサ。
- 請求項1または2記載の渦電流センサにおいて、渦電流は、少なくとも700kHzの周波数を有することを特徴とする渦電流センサ。
- 請求項3記載の渦電流センサにおいて、電圧フォロワ(13)は、少なくとも150MHzの3db遮断周波数を有することを特徴とする渦電流センサ。
- 請求項1から4のいずれかに記載の渦電流センサのセンサ・コイル(4)において、センサ・コイル(4)は、空心であり、1つまたはいくつかの重なった巻き線層のそれぞれに配置した所定数の連続した巻き線を有する2つ以上のセグメント(s1〜sn)を含み、これらのコイル・セグメント(s1〜sn)は、コイル軸(17)に沿って隣り合って配列され、直列に接続されることを特徴とするセンサ・コイル。
- 請求項5記載のセンサ・コイルにおいて、コイル・セグメント(s1〜sn)は、奇数の巻き線層を有していることを特徴とするセンサ・コイル。
- 請求項5または6記載のセンサ・コイルにおいて、コイル・セグメント(s1〜sn)は、1つの巻き線ワイヤから連続して巻かれることを特徴とするセンサ・コイル。
- 請求項5から7のいずれかに記載のセンサ・コイルにおいて、コイル・セグメントは、共通のボビン(18)の周囲に巻かれることを特徴とするセンサ・コイル。
- 請求項5から7のいずれかに記載のセンサ・コイルにおいて、コイル・セグメントの外径Dは、コイルの長さLよりも大きいことを特徴とするセンサ・コイル。
- 請求項5から9のいずれかに記載のセンサ・コイルにおいて、各セグメントの巻き線は、1つ以上の重なった巻き線層に配置されることを特徴とするセンサ・コイル。
- 請求項5から10のいずれかに記載のセンサ・コイルにおいて、隣接するコイル・セグメント同士の隣接する巻き線間の距離は、コイル・セグメント内において隣接する巻き線間の距離よりも大きいことを特徴とするセンサ・コイル。
- 請求項5から11のいずれかに記載のセンサ・コイル(4)を有する渦電流センサ。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05405682A EP1793207B1 (en) | 2005-12-02 | 2005-12-02 | Eddy current sensor and sensor coil for the same |
EP05405682.5 | 2005-12-02 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2007155727A JP2007155727A (ja) | 2007-06-21 |
JP5091468B2 true JP5091468B2 (ja) | 2012-12-05 |
Family
ID=36118104
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2006325295A Active JP5091468B2 (ja) | 2005-12-02 | 2006-12-01 | 渦電流センサおよび同センサのセンサ・コイル |
Country Status (5)
Country | Link |
---|---|
US (1) | US7336069B2 (ja) |
EP (1) | EP1793207B1 (ja) |
JP (1) | JP5091468B2 (ja) |
AT (1) | ATE408123T1 (ja) |
DE (1) | DE602005009726D1 (ja) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8436608B2 (en) * | 2009-09-21 | 2013-05-07 | General Electric Company | Eddy current inspection system and method |
EP2357374B1 (de) | 2010-01-29 | 2016-02-17 | Levitronix GmbH | Magnetische Lagervorrichtung |
WO2012133569A1 (ja) * | 2011-03-31 | 2012-10-04 | 株式会社東京精密 | 渦電流センサ |
DE102011110666A1 (de) * | 2011-05-11 | 2012-11-15 | Micro-Epsilon Messtechnik Gmbh & Co. Kg | Sensor, System mit einem Sensor und einem Messobjekt sowie Verfahren zur Temperaturmessung mittels Sensor |
US9983228B2 (en) * | 2014-09-24 | 2018-05-29 | Keithley Instruments, Llc | Triaxial DC-AC connection system |
DE102014219645B4 (de) * | 2014-09-29 | 2020-12-24 | Bayerische Motoren Werke Aktiengesellschaft | Elektrische Verbindungseinrichtung zum Übertragen von elektrischer Energie und/oder Daten, Bordnetz und Kraftfahrzeug |
JP7029040B2 (ja) * | 2016-04-12 | 2022-03-03 | テキサス インスツルメンツ インコーポレイテッド | シールドされたケーブルを介して共振器コンデンサに結合されるセンサインダクタを備えるセンサ共振器を用いる遠隔検知 |
CN107121153A (zh) * | 2017-05-22 | 2017-09-01 | 天津大学 | 高速电涡流传感器 |
CN114317301B (zh) * | 2020-09-30 | 2023-07-18 | 安琪酵母股份有限公司 | 酿酒酵母菌、面用干酵母以及其应用 |
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JP4356570B2 (ja) * | 2004-09-16 | 2009-11-04 | 沖電気工業株式会社 | 静電容量型距離センサ |
-
2005
- 2005-12-02 AT AT05405682T patent/ATE408123T1/de not_active IP Right Cessation
- 2005-12-02 EP EP05405682A patent/EP1793207B1/en active Active
- 2005-12-02 DE DE602005009726T patent/DE602005009726D1/de active Active
-
2006
- 2006-12-01 JP JP2006325295A patent/JP5091468B2/ja active Active
- 2006-12-01 US US11/565,894 patent/US7336069B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
ATE408123T1 (de) | 2008-09-15 |
US7336069B2 (en) | 2008-02-26 |
EP1793207A1 (en) | 2007-06-06 |
US20070229065A1 (en) | 2007-10-04 |
JP2007155727A (ja) | 2007-06-21 |
DE602005009726D1 (de) | 2008-10-23 |
EP1793207B1 (en) | 2008-09-10 |
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