JPS57165761A - Transducer for electro-magnetic ultrasonic wave - Google Patents

Transducer for electro-magnetic ultrasonic wave

Info

Publication number
JPS57165761A
JPS57165761A JP56050211A JP5021181A JPS57165761A JP S57165761 A JPS57165761 A JP S57165761A JP 56050211 A JP56050211 A JP 56050211A JP 5021181 A JP5021181 A JP 5021181A JP S57165761 A JPS57165761 A JP S57165761A
Authority
JP
Japan
Prior art keywords
high permeability
permeability material
inside high
magnets
materials
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
Application number
JP56050211A
Other languages
Japanese (ja)
Inventor
Toshihiro Mori
Nobutada Sugaya
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP56050211A priority Critical patent/JPS57165761A/en
Publication of JPS57165761A publication Critical patent/JPS57165761A/en
Pending legal-status Critical Current

Links

Classifications

    • 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]

Abstract

PURPOSE:To contrive to raise receiving sensitivity remarkably by setting at a suitable value the ratios of the thickness of a permanent magnet, inside high permeability material and high permeability materials on both sides. CONSTITUTION:A plural number, for instance two, of permanent magnets 111 and 112 form a magnetic field generating section with inside high permeability material 12 and outside high permeability materials 131 and 132 placing the magnets 111 and 112 betweens them. In this case the ratios of thickness among the inside high permeability material 12 and permanent magnets 111 and 112 and outside high permeability materials 131 and 132 are set at 1.5-2 and 2-3 and 1 respectively. The inside high permeability material 12 and outside high permeability materials 131 and 132 are made longer than the permeanent magnets 111 and 112, and the inside high permeability material 12 is wound as a wound body by a receiving coil 14. with this construction, receiving sensitivity can be raised to a great deal.
JP56050211A 1981-04-03 1981-04-03 Transducer for electro-magnetic ultrasonic wave Pending JPS57165761A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56050211A JPS57165761A (en) 1981-04-03 1981-04-03 Transducer for electro-magnetic ultrasonic wave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56050211A JPS57165761A (en) 1981-04-03 1981-04-03 Transducer for electro-magnetic ultrasonic wave

Publications (1)

Publication Number Publication Date
JPS57165761A true JPS57165761A (en) 1982-10-12

Family

ID=12852753

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56050211A Pending JPS57165761A (en) 1981-04-03 1981-04-03 Transducer for electro-magnetic ultrasonic wave

Country Status (1)

Country Link
JP (1) JPS57165761A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60227163A (en) * 1984-04-03 1985-11-12 Hiroshi Shimizu Electromagnetic ultrasonic transducer for transversal wave using high-frequency magnetic core
FR2679406A1 (en) * 1991-07-18 1993-01-22 Mannesmann Ag ULTRASONIC ELECTRODYNAMIC TRANSDUCER.
US5837898A (en) * 1995-07-27 1998-11-17 The Babcock & Wilcox Company Electromagnetic acoustic transducer (EMAT) for ultrasonic inspection of liquids in containers
US6122969A (en) * 1998-08-24 2000-09-26 Mcdermott Technology, Inc. Main bang recovery EMAT
US6192760B1 (en) 1999-08-19 2001-02-27 Mcdermott Technology, Inc. EMAT transmit/receive switch
DE102013010824A1 (en) * 2013-06-28 2014-12-31 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus for generating and / or detecting ultrasonic waves in the form of longitudinally polarized bulk waves
EP2565642A4 (en) * 2010-04-27 2016-12-21 Ihi Inspection And Instr Co Ltd L-mode guided wave sensor

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60227163A (en) * 1984-04-03 1985-11-12 Hiroshi Shimizu Electromagnetic ultrasonic transducer for transversal wave using high-frequency magnetic core
JPH0257267B2 (en) * 1984-04-03 1990-12-04 Hiroshi Shimizu
FR2679406A1 (en) * 1991-07-18 1993-01-22 Mannesmann Ag ULTRASONIC ELECTRODYNAMIC TRANSDUCER.
US5837898A (en) * 1995-07-27 1998-11-17 The Babcock & Wilcox Company Electromagnetic acoustic transducer (EMAT) for ultrasonic inspection of liquids in containers
US6122969A (en) * 1998-08-24 2000-09-26 Mcdermott Technology, Inc. Main bang recovery EMAT
US6234026B1 (en) 1998-08-24 2001-05-22 Mcdermott Technology, Inc. Main bang recovery EMAT
US6192760B1 (en) 1999-08-19 2001-02-27 Mcdermott Technology, Inc. EMAT transmit/receive switch
EP2565642A4 (en) * 2010-04-27 2016-12-21 Ihi Inspection And Instr Co Ltd L-mode guided wave sensor
DE102013010824A1 (en) * 2013-06-28 2014-12-31 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus for generating and / or detecting ultrasonic waves in the form of longitudinally polarized bulk waves

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