JPS56124048A - Electromagnetic ultrasonic probe device - Google Patents

Electromagnetic ultrasonic probe device

Info

Publication number
JPS56124048A
JPS56124048A JP2669480A JP2669480A JPS56124048A JP S56124048 A JPS56124048 A JP S56124048A JP 2669480 A JP2669480 A JP 2669480A JP 2669480 A JP2669480 A JP 2669480A JP S56124048 A JPS56124048 A JP S56124048A
Authority
JP
Japan
Prior art keywords
iron core
electric magnet
transmitting
eddy current
reception coil
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
JP2669480A
Other languages
Japanese (ja)
Inventor
Takashi Kadowaki
Minoru Fujimoto
Kazuya Sato
Jun Kubota
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2669480A priority Critical patent/JPS56124048A/en
Publication of JPS56124048A publication Critical patent/JPS56124048A/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]

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

PURPOSE:To prevent an erroneous probe under the adverse effect of a reflective wave on an electromagnetic iron core by providing a means to prevent the generation of an eddy current so that an eddy current may not be generated, on the magnetic pole of an electric magnet where a transmitting/reception coil is installed. CONSTITUTION:Plural radial grooves 12 are provided on the transmitting/reception coil 5 mounting face of a central leg 10 for an electric magnet iron core 3. When an injury is probed, a DC coil 2 is excited by a DC power supply and a pulse current is applied to an ultrasonic transmitting/reception coil 5 under a state where a DC magnetic field is aplied onto a material to be tested 1. At that time, if an eddy current tended to occur at the central lower face of a DC electric magnet iron core 3, it is prevented by means of a groove 12. Because of the nongeneration of an eddy current, an ultrasonic wave does not spread in the electric magnet iron core 3. Therefore, the transmitting/reception coil 5 does not receive a reflective wave on the electric magnet iron core 3. Thus a reflective wave on the iron core dissipates, so that a defective wave F can be detected definitely.
JP2669480A 1980-03-05 1980-03-05 Electromagnetic ultrasonic probe device Pending JPS56124048A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2669480A JPS56124048A (en) 1980-03-05 1980-03-05 Electromagnetic ultrasonic probe device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2669480A JPS56124048A (en) 1980-03-05 1980-03-05 Electromagnetic ultrasonic probe device

Publications (1)

Publication Number Publication Date
JPS56124048A true JPS56124048A (en) 1981-09-29

Family

ID=12200489

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2669480A Pending JPS56124048A (en) 1980-03-05 1980-03-05 Electromagnetic ultrasonic probe device

Country Status (1)

Country Link
JP (1) JPS56124048A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0069865A2 (en) * 1981-06-16 1983-01-19 Nukem GmbH Electrodynamic movable head

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0069865A2 (en) * 1981-06-16 1983-01-19 Nukem GmbH Electrodynamic movable head

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