JPH10512967A - 強磁性材料の検査装置 - Google Patents
強磁性材料の検査装置Info
- Publication number
- JPH10512967A JPH10512967A JP9519386A JP51938697A JPH10512967A JP H10512967 A JPH10512967 A JP H10512967A JP 9519386 A JP9519386 A JP 9519386A JP 51938697 A JP51938697 A JP 51938697A JP H10512967 A JPH10512967 A JP H10512967A
- Authority
- JP
- Japan
- Prior art keywords
- ultrasonic transducer
- magnetic field
- electromagnetic ultrasonic
- coil
- pole
- 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.)
- Granted
Links
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/24—Probes
- G01N29/2412—Probes using the magnetostrictive properties of the material to be examined, e.g. electromagnetic acoustic transducers [EMAT]
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9013—Arrangements for scanning
- G01N27/902—Arrangements for scanning by moving the sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/042—Wave modes
- G01N2291/0422—Shear waves, transverse waves, horizontally polarised waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/042—Wave modes
- G01N2291/0427—Flexural waves, plate waves, e.g. Lamb waves, tuning fork, cantilever
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/263—Surfaces
- G01N2291/2636—Surfaces cylindrical from inside
Landscapes
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Pathology (AREA)
- Immunology (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electromagnetism (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.磁界と結合されて材料壁内での超音波の励起および/または検出のために用 いられる少なくとも1つの高周波電流コイルと、磁界を発生させる少なくとも1 つの磁石系とから成る電磁的な超音波変換器により、導管等のような強磁性材料 を欠陥、亀裂、腐蝕等について検査する装置において、 材料壁内で予備磁界を発生させる付加的な磁石装置(3,4)のれぞれ異な る極性の各磁極領域(5,5′,6,6′)の間に、超音波変換器(9,11, 17,23,31,41)が配置されていることを特徴とする、強磁性材料を検 査する装置。 2.前記の付加的な磁石装置(3,4)は、それぞれ異なる極性をもつ少なくと も2つの磁極片を有する永久磁石により形成されている、請求項1記載の装置。 3.前記超音波変換器(9,11,17,23,31,42)は、前記の付加的 な磁石装置(3,4)の各磁極片(5,5′,6,6′)の間の中央に配置され ている、請求項1または2記載の装置。 4.前記超音波変換器(9,11,17,23,31,42)は、被検査材料中 に水平偏波された横波(SH波)を励起/発生させるために用いられる、請求項 1〜3のいずれか1項記載の装置。 5.前記の電磁的な超音波変換器(9,11,17,23,31,42)は、漂 遊磁束測定に用いる磁化測定ユニット(3,4)における各磁極片(5,5′, 6,6′,14,14′)の間に配置されている、請求項1〜4のいずれか1項 記載の装置。 6.前記の付加的な磁石装置(3,4)におけるそれぞれ異なる極性をもつ各磁 極片(6,6′,5,5′)により発生する材料壁(2)の予備磁化は、前記の 電磁的な超音波変換器(9,11,17,23,31,42)の動作点を調整す るために用いられる、請求項1〜5のいずれか1項記載の装置。 7.超音波変換器(9)を間に収容する付加的な磁石装置(3)におけるそれぞ れ異なる極性の磁極領域ないし磁極片(5,5′)は、被検査材料たとえば導管 (2)等に対し軸線に平行に配置されている、請求項1〜6のいずれか1項記載 の装置。 8.電磁的な超音波変換器(11)を間に収容する付加的な磁石装置(3,4) におけるそれぞれ異なる極性の磁極領域ないし磁極片(5,6′)は、被検査材 料(2)たとえば導管等の周方向に配置されている、請求項1〜6のいずれか1 項記載の装置。 9.電磁的な超音波変換器(9)の放射方向は、前記の付加的な磁石装置(3) により発生する予備磁界の磁界方向に対し垂直に位置する、請求項1〜8のいず れか1項記載の装置。 10.電磁的な超音波変換器(11)の放射方向は、前記の付加的な磁石装置(3 ,4)により発生する予備磁界の磁界方向に対し平行に位置する、請求項1〜8 のいずれか1項記載の装置。 11.前記高周波コイル(13,20,28,29,30,39)は空心コイルで ある、請求項1〜10のいずれか1項記載の装置。 12.前記高周波コイル(13,20,28,29,30,39)は、メアンダ状 に蛇行する巻線によるフラットコイルである、請求項11記載の装置。 13.電磁的な超音波変換器(17,23,31)は、交互に変わる磁極配列によ る複数の永久磁石セグメント(18,19,24,25,26,27,32,3 3,34,35,36)の配列体と、前記永久磁石セグメント(18,19,2 4,25,26,27,32,33,34,35,36)の下に配置された少な くとも1つの高周波コイル(20,28,39,39′)により形成されている 、請求項1〜12のいずれか1項記載の装置。 14.電磁的な超音波変換器(17)は、交互に変わる磁極配列による複数の永久 磁石(19)の2つの列(18)から成る配列体を有しており、該配列体の上に 少なくとも1つの方形コイル(20)が配置されている、請求項13記載の装置 。 15.交互に変わる磁極配列による複数の永久磁石(1 9,27,36)から成る列(18,32,33,34,35)の下に高周波コ イル(20,28,39,39′)が配置されていて、同じ電流方向の高周波コ イル部材(20,28,39,39′)は、同じ極性順序の永久磁石列にそれぞ れ対応づけられている、請求項13または14記載の装置。 16.電磁的な超音波変換器(23)は、配向に関し碁盤目状に配分されたそれぞ れ異なる極性の永久磁石(27)による少なくとも2つのセット(24,25, 26)と、それらの下に配置された高周波コイル部材(28,29,30)によ り構成されている、請求項13または15記載の装置。 17.前記高周波コイル部材(28,29,30)に対し時間的に遅延されて信号 が印加される、請求項16記載の装置。 18.電磁的な超音波変換器(31)は、交互に変わる極性の複数の永久磁石セグ メント(36)から成る少なくとも4つの列(32,33,34,35)を有し ており、複数の永久磁石セグメント(36)から成る互いに隣り合う2つの列( 32,33,34,35)は、各列(32,33,34,35)の個々の永久磁 石(36)による周期の4分の1だけそれらの長手軸に沿ってずらされており、 それぞれ隣り合う複数の永久磁石セグメント(36)から成る列(32,33, 34,35)のために1つの固有 の高周波コイル(39,39′)が設けられている、請求項13〜15のいずれ か1項記載の装置。 19.互いに隣り合う列の2つの高周波コイル(39,39′)に対し90°位相 のずらされた信号が印加される、請求項18記載の装置。 20.2つの高周波コイル(39,39′)は互いにネストして重なり合っている 、請求項18または19記載の装置。 21.電磁的な超音波変換器(42)は、磁気伝導性のコア(43)に巻回された 高周波コイル(44)を有する、請求項1〜10のいずれか1項記載の装置。 22.前記コア(43)はリングバンドコアであって、該コアは交互に変わる磁極 配列の永久磁石(45)から成る複数の列による配列体を部分的に取り囲んでい る、請求項21記載の装置。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19543481.1 | 1995-11-22 | ||
DE19543481A DE19543481C2 (de) | 1995-11-22 | 1995-11-22 | Vorrichtung zur Prüfung von ferromagnetischen Materialien |
PCT/EP1996/005095 WO1997019346A1 (de) | 1995-11-22 | 1996-11-19 | Vorrichtung zur prüfung von ferromagnetischen materialien |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH10512967A true JPH10512967A (ja) | 1998-12-08 |
JP3806747B2 JP3806747B2 (ja) | 2006-08-09 |
Family
ID=7778083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP51938697A Expired - Fee Related JP3806747B2 (ja) | 1995-11-22 | 1996-11-19 | 強磁性材料の検査装置 |
Country Status (9)
Country | Link |
---|---|
US (1) | US6009756A (ja) |
EP (1) | EP0775910B1 (ja) |
JP (1) | JP3806747B2 (ja) |
CA (1) | CA2209899C (ja) |
DE (2) | DE19543481C2 (ja) |
DK (1) | DK0775910T3 (ja) |
ES (1) | ES2223057T3 (ja) |
NO (1) | NO323276B1 (ja) |
WO (1) | WO1997019346A1 (ja) |
Cited By (2)
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---|---|---|---|---|
JP2009236561A (ja) * | 2008-03-26 | 2009-10-15 | Toshiba Corp | 電磁超音波探触子および超音波探傷装置ならびに超音波探傷方法 |
JP2011220972A (ja) * | 2010-04-14 | 2011-11-04 | Kyushu Electric Power Co Inc | 電磁超音波センサ |
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DE19929072A1 (de) | 1999-06-25 | 2000-12-28 | Pii Pipetronix Gmbh | Vorrichtung zur Prüfung von Rohrleitungen aus ferromagnetischen Materialien |
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GB2385229B (en) * | 2002-02-05 | 2005-04-20 | Pii Ltd | Electromagnetic acoustic transducers |
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SU590660A1 (ru) * | 1975-07-28 | 1978-01-30 | Всесоюзный Научно-Исследовательский Институт По Разработке Неразрушающих Методов И Средств Контроля Качества Материалов | Электромагнитно-акустический преобразователь |
US4184374A (en) * | 1978-06-22 | 1980-01-22 | Rockwell International Corporation | Ultrasonic inspection of a cylindrical object |
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DE4228426C1 (de) * | 1992-08-26 | 1994-03-24 | Mannesmann Ag | Elektrodynamische Ultraschallprüfeinrichtung |
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DE4303293C1 (de) * | 1993-02-05 | 1994-03-24 | Fraunhofer Ges Forschung | Elektro-magnetischer Ultraschallwellenwandler |
EP0677742B1 (de) * | 1994-04-14 | 2004-10-06 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Vorrichtung und Verfahren zur Erfassung der Prüfkopfabhebung bei der zerstörungsfreien Untersuchung von metallischen Werkstoffen mit elektromagnetischen Ultraschallwandlern |
-
1995
- 1995-11-22 DE DE19543481A patent/DE19543481C2/de not_active Expired - Fee Related
-
1996
- 1996-11-07 DK DK96117842T patent/DK0775910T3/da active
- 1996-11-07 ES ES96117842T patent/ES2223057T3/es not_active Expired - Lifetime
- 1996-11-07 DE DE59611033T patent/DE59611033D1/de not_active Expired - Lifetime
- 1996-11-07 EP EP96117842A patent/EP0775910B1/de not_active Expired - Lifetime
- 1996-11-19 CA CA002209899A patent/CA2209899C/en not_active Expired - Fee Related
- 1996-11-19 JP JP51938697A patent/JP3806747B2/ja not_active Expired - Fee Related
- 1996-11-19 WO PCT/EP1996/005095 patent/WO1997019346A1/de active Application Filing
- 1996-11-19 US US08/860,968 patent/US6009756A/en not_active Expired - Lifetime
- 1996-11-20 NO NO19964932A patent/NO323276B1/no not_active IP Right Cessation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009236561A (ja) * | 2008-03-26 | 2009-10-15 | Toshiba Corp | 電磁超音波探触子および超音波探傷装置ならびに超音波探傷方法 |
JP2011220972A (ja) * | 2010-04-14 | 2011-11-04 | Kyushu Electric Power Co Inc | 電磁超音波センサ |
Also Published As
Publication number | Publication date |
---|---|
DE19543481C2 (de) | 1997-10-23 |
EP0775910A1 (de) | 1997-05-28 |
NO323276B1 (no) | 2007-02-26 |
CA2209899A1 (en) | 1997-05-29 |
JP3806747B2 (ja) | 2006-08-09 |
DK0775910T3 (da) | 2004-11-15 |
EP0775910B1 (de) | 2004-07-07 |
NO964932L (no) | 1997-05-23 |
WO1997019346A1 (de) | 1997-05-29 |
US6009756A (en) | 2000-01-04 |
DE19543481A1 (de) | 1997-05-28 |
DE59611033D1 (de) | 2004-08-12 |
ES2223057T3 (es) | 2005-02-16 |
NO964932D0 (no) | 1996-11-20 |
CA2209899C (en) | 2004-05-25 |
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