JPS6428525A - Shape detector - Google Patents
Shape detectorInfo
- Publication number
- JPS6428525A JPS6428525A JP18359087A JP18359087A JPS6428525A JP S6428525 A JPS6428525 A JP S6428525A JP 18359087 A JP18359087 A JP 18359087A JP 18359087 A JP18359087 A JP 18359087A JP S6428525 A JPS6428525 A JP S6428525A
- Authority
- JP
- Japan
- Prior art keywords
- displacement
- generated
- eddy current
- strip body
- signal
- 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
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
PURPOSE:To achieve a detection of displacement of a strip body without errors, by detecting an eddy current generated in the strip body with an oscillation coil to correct changes in the eddy current caused by magnetic flux from outside. CONSTITUTION:When a high frequency signal is inputted into an oscillation coil 31, an eddy current ie is generated in a strip body 1 and a value thereof is a function of a distance between an eddy current type displacement detector 4d and the strip body 1. On the other hand, a magnetic flux phi1 is generated from an exciting coil B of an external applicator 4a and interferes with a magnetic flux phi2 generated with the coil 31 to change the eddy current ie. On the other hand, a signal of a square wave oscillator 3 is proportional to an excitation current for exciting the device 4a, which allows the generation of a correction value corresponding to the excitation current by a current correspondence correction circuit 21 with a signal of a square wave oscillator 3 as reference. With an output of an impedance-displacement converter 4e as reference, a displacement correspondence correction value is generated with a displacement correspondence correction circuit 22. An output of the converter 4e is corrected with displacement error correction circuit 23 by correction values from the circuits 21 and 22 to obtain a correct displacement signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18359087A JPS6428525A (en) | 1987-07-24 | 1987-07-24 | Shape detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18359087A JPS6428525A (en) | 1987-07-24 | 1987-07-24 | Shape detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6428525A true JPS6428525A (en) | 1989-01-31 |
Family
ID=16138480
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP18359087A Pending JPS6428525A (en) | 1987-07-24 | 1987-07-24 | Shape detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6428525A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996009516A1 (en) * | 1994-09-22 | 1996-03-28 | Micro-Epsilon Messtechnik Gmbh & Co. Kg | Sensor arrangement and method of detecting measured values using said sensor arrangement |
JP2010048569A (en) * | 2008-08-19 | 2010-03-04 | Sumitomo Metal Mining Siporex Kk | Method for inspecting covering depth of main reinforcement bar of alc panel |
-
1987
- 1987-07-24 JP JP18359087A patent/JPS6428525A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996009516A1 (en) * | 1994-09-22 | 1996-03-28 | Micro-Epsilon Messtechnik Gmbh & Co. Kg | Sensor arrangement and method of detecting measured values using said sensor arrangement |
JP2010048569A (en) * | 2008-08-19 | 2010-03-04 | Sumitomo Metal Mining Siporex Kk | Method for inspecting covering depth of main reinforcement bar of alc panel |
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