JPS5560805A - Profile measuring instrument - Google Patents

Profile measuring instrument

Info

Publication number
JPS5560805A
JPS5560805A JP13425678A JP13425678A JPS5560805A JP S5560805 A JPS5560805 A JP S5560805A JP 13425678 A JP13425678 A JP 13425678A JP 13425678 A JP13425678 A JP 13425678A JP S5560805 A JPS5560805 A JP S5560805A
Authority
JP
Japan
Prior art keywords
resistance
fitting hole
pipe fitting
pipe
change
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
JP13425678A
Other languages
Japanese (ja)
Inventor
Takashi Endo
Takeo Kamimura
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries 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 Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP13425678A priority Critical patent/JPS5560805A/en
Publication of JPS5560805A publication Critical patent/JPS5560805A/en
Pending legal-status Critical Current

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Landscapes

  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

PURPOSE: To measure the deformation of a pipe fitting hole in a short time and quantatively without taking off a pipe by detecting the profile of the pipe fitting hole on a pipe plate using change of resistance of magnetic resistance elements at the time of rotation of a permanent magnet.
CONSTITUTION: If a permanent magnet piece 2 is rotated by a driving motor 3 where a pipe fitting hole 17a is perfectly round, the magnetic flux of the permanent magnet piece 2 detected by each of magnetic resistance elements 41W4n is constant and resistance changes by the same amount continuously. If such change of the resistance is converted into electrical signals a straight line a is obtained. On the contrary, when the internal surface of the pipe fitting hole 17a is corrosive and deformed, the change of resistance of each of th resistance elements 41W4n becomes smaller at a layer diameter part. If such change of the resistance is converted into electrical signals a curve b is obtained. Thus, the deformation of the pipe fitting hole 17a can be detected in a short time and quantitively without taking off the pipe.
COPYRIGHT: (C)1980,JPO&Japio
JP13425678A 1978-10-31 1978-10-31 Profile measuring instrument Pending JPS5560805A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13425678A JPS5560805A (en) 1978-10-31 1978-10-31 Profile measuring instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13425678A JPS5560805A (en) 1978-10-31 1978-10-31 Profile measuring instrument

Publications (1)

Publication Number Publication Date
JPS5560805A true JPS5560805A (en) 1980-05-08

Family

ID=15124038

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13425678A Pending JPS5560805A (en) 1978-10-31 1978-10-31 Profile measuring instrument

Country Status (1)

Country Link
JP (1) JPS5560805A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5465045A (en) * 1993-10-28 1995-11-07 Derock; Richard Eddy current probe with deflectable sidewalls
US6388439B1 (en) * 1999-02-19 2002-05-14 Coflexip Method and device for measuring in situ the gap between two given elements in a tubular pipe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5465045A (en) * 1993-10-28 1995-11-07 Derock; Richard Eddy current probe with deflectable sidewalls
US6388439B1 (en) * 1999-02-19 2002-05-14 Coflexip Method and device for measuring in situ the gap between two given elements in a tubular pipe

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