JPS57192811A - Method and apparatus for measuring thickness deviation rate of metal pipe by electromagnetic ultrasonic wave - Google Patents

Method and apparatus for measuring thickness deviation rate of metal pipe by electromagnetic ultrasonic wave

Info

Publication number
JPS57192811A
JPS57192811A JP7893981A JP7893981A JPS57192811A JP S57192811 A JPS57192811 A JP S57192811A JP 7893981 A JP7893981 A JP 7893981A JP 7893981 A JP7893981 A JP 7893981A JP S57192811 A JPS57192811 A JP S57192811A
Authority
JP
Japan
Prior art keywords
metal pipe
ultrasonic wave
detectors
electromagnetic ultrasonic
thicknesses
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
JP7893981A
Other languages
Japanese (ja)
Other versions
JPS6250761B2 (en
Inventor
Katsuhiro Kawashima
Shoji Murota
Hiroshi Soga
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel Corp
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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP7893981A priority Critical patent/JPS57192811A/en
Publication of JPS57192811A publication Critical patent/JPS57192811A/en
Publication of JPS6250761B2 publication Critical patent/JPS6250761B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B17/00—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations
    • G01B17/02—Measuring arrangements characterised by the use of infrasonic, sonic or ultrasonic vibrations for measuring thickness

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)

Abstract

PURPOSE:To measure the amount and location of the thickness deviation from the values of the thicknesses of the metal pipe, by arranging a pair of electromagnetic ultrasonic wave generator detectors at a specified angle with respect to the outer surface of the metal pipe. CONSTITUTION:When the high temperature metal pipe 23 is advanced in the direction of an arrow 24 by a conveying roller 24, holding and profiling devices 27 and 27' of the electromagnetic ultrasonic wave generator detectors 3 and 3' are driven, and a high frequency pulse power source 29 and a field generating power source 30 are stated. The detected signals corresponding to the thicknesses at two points of the metal pipe 23 are obtained by the electromagnetic ultrasonic wave generator detectors 3 and 3'. The detected signals are sent to dedicated amplifiers 31 and 31' and added in an adder 32. The result is sent to a thickness signal processor 33. The processor 33 identifies the instantaneous synchronizing signals from the high frequency pulse power source 29 when the ultrasonic wave is generated in the generator detectors 3 and 3', and detects the corresponding detected signals. Then the thicknesses of the two points of the metal pipe 23 is computed.
JP7893981A 1981-05-25 1981-05-25 Method and apparatus for measuring thickness deviation rate of metal pipe by electromagnetic ultrasonic wave Granted JPS57192811A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7893981A JPS57192811A (en) 1981-05-25 1981-05-25 Method and apparatus for measuring thickness deviation rate of metal pipe by electromagnetic ultrasonic wave

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7893981A JPS57192811A (en) 1981-05-25 1981-05-25 Method and apparatus for measuring thickness deviation rate of metal pipe by electromagnetic ultrasonic wave

Publications (2)

Publication Number Publication Date
JPS57192811A true JPS57192811A (en) 1982-11-27
JPS6250761B2 JPS6250761B2 (en) 1987-10-27

Family

ID=13675845

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7893981A Granted JPS57192811A (en) 1981-05-25 1981-05-25 Method and apparatus for measuring thickness deviation rate of metal pipe by electromagnetic ultrasonic wave

Country Status (1)

Country Link
JP (1) JPS57192811A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61173105A (en) * 1985-01-29 1986-08-04 Mitsubishi Heavy Ind Ltd Instrument for measuring wall thickness of hot pipe
JPH03100406A (en) * 1989-09-07 1991-04-25 Westinghouse Electric Corp <We> Ultrasonic system for measuring external form of object
CN105021143A (en) * 2015-06-25 2015-11-04 沈阳中科韦尔腐蚀控制技术有限公司 Online high temperature-resisting pipeline wall thickness monitoring probe

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61173105A (en) * 1985-01-29 1986-08-04 Mitsubishi Heavy Ind Ltd Instrument for measuring wall thickness of hot pipe
JPH03100406A (en) * 1989-09-07 1991-04-25 Westinghouse Electric Corp <We> Ultrasonic system for measuring external form of object
CN105021143A (en) * 2015-06-25 2015-11-04 沈阳中科韦尔腐蚀控制技术有限公司 Online high temperature-resisting pipeline wall thickness monitoring probe

Also Published As

Publication number Publication date
JPS6250761B2 (en) 1987-10-27

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