JPS55126854A - Electromagnetic induction flaw detecting method - Google Patents

Electromagnetic induction flaw detecting method

Info

Publication number
JPS55126854A
JPS55126854A JP3439979A JP3439979A JPS55126854A JP S55126854 A JPS55126854 A JP S55126854A JP 3439979 A JP3439979 A JP 3439979A JP 3439979 A JP3439979 A JP 3439979A JP S55126854 A JPS55126854 A JP S55126854A
Authority
JP
Japan
Prior art keywords
signal
amplifier
output
differential amplifier
electromagnetic induction
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
Application number
JP3439979A
Other languages
Japanese (ja)
Other versions
JPS5920100B2 (en
Inventor
Hiromitsu Sato
Sumiyuki Arima
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.)
Furukawa Electric Co Ltd
Original Assignee
Furukawa Electric Co 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 Furukawa Electric Co Ltd filed Critical Furukawa Electric Co Ltd
Priority to JP3439979A priority Critical patent/JPS5920100B2/en
Publication of JPS55126854A publication Critical patent/JPS55126854A/en
Publication of JPS5920100B2 publication Critical patent/JPS5920100B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

PURPOSE: To make high-precision flaw detection possible by automatically correcting the characteristic variation of a balancing unit by inputting a false flaw signal of a fixed level to the unit and then by using its detection output signal at that time.
CONSTITUTION: A false flaw signal from false flaw signal generator 9 is inputted to differential amplifier 12 and the output signal of amplifier 7 is also supplied to this amplifier 12 to lead out a negative-positive voltage difference signal corresponding to a difference between both signals from differential amplifier 12. This difference signal is amplified by servo-amplifier 13 and by its output, driving body 14 such as a servomotor is turned forward or reversed to adjust gain regulator 11 automatically so that the output of differential amplifier 12 will be zero.
COPYRIGHT: (C)1980,JPO&Japio
JP3439979A 1979-03-26 1979-03-26 Electromagnetic induction flaw detection method Expired JPS5920100B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3439979A JPS5920100B2 (en) 1979-03-26 1979-03-26 Electromagnetic induction flaw detection method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3439979A JPS5920100B2 (en) 1979-03-26 1979-03-26 Electromagnetic induction flaw detection method

Publications (2)

Publication Number Publication Date
JPS55126854A true JPS55126854A (en) 1980-10-01
JPS5920100B2 JPS5920100B2 (en) 1984-05-10

Family

ID=12413098

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3439979A Expired JPS5920100B2 (en) 1979-03-26 1979-03-26 Electromagnetic induction flaw detection method

Country Status (1)

Country Link
JP (1) JPS5920100B2 (en)

Also Published As

Publication number Publication date
JPS5920100B2 (en) 1984-05-10

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