JPS5560805A - Profile measuring instrument - Google Patents
Profile measuring instrumentInfo
- 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
Links
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
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)
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 |
-
1978
- 1978-10-31 JP JP13425678A patent/JPS5560805A/en active Pending
Cited By (2)
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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