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 waveInfo
- 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
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.
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)
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 |
-
1981
- 1981-05-25 JP JP7893981A patent/JPS57192811A/en active Granted
Cited By (3)
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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