JPS6428525A - Shape detector - Google Patents

Shape detector

Info

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
Application number
JP18359087A
Other languages
Japanese (ja)
Inventor
Katsuya Ueki
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 Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP18359087A priority Critical patent/JPS6428525A/en
Publication of JPS6428525A publication Critical patent/JPS6428525A/en
Pending legal-status Critical Current

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  • 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.
JP18359087A 1987-07-24 1987-07-24 Shape detector Pending JPS6428525A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (2)

* Cited by examiner, † Cited by third party
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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