JPS5512401A - Eddy current type range finder - Google Patents

Eddy current type range finder

Info

Publication number
JPS5512401A
JPS5512401A JP8391678A JP8391678A JPS5512401A JP S5512401 A JPS5512401 A JP S5512401A JP 8391678 A JP8391678 A JP 8391678A JP 8391678 A JP8391678 A JP 8391678A JP S5512401 A JPS5512401 A JP S5512401A
Authority
JP
Japan
Prior art keywords
voltage
eddy current
range finder
current type
type range
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
Application number
JP8391678A
Other languages
Japanese (ja)
Other versions
JPS61921B2 (en
Inventor
Kazuo Sano
Seigo Ando
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan 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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP8391678A priority Critical patent/JPS5512401A/en
Publication of JPS5512401A publication Critical patent/JPS5512401A/en
Publication of JPS61921B2 publication Critical patent/JPS61921B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

PURPOSE: To compensate the reduction in the measuring accuracy due to the temperature change by superposing the DC voltage upon the AC voltage from an oscillator and by detecting the DC resistance of a measuring coil so that the value of a feedback impedance may be adjusted by the use of the DC voltage obtained.
CONSTITUTION: An AC voltage is impressed from an oscillator 1 upon an amplifier 2 which is composed of a feedback impedance ZS, a parallel circuit and a measuring coil 3. Moreover, a DC voltage is impressed from a DC power source 5 so that an AC magnetic field is generated from the measuring coil 3. This magnetic field intersects a metal material 4 to be measured so that the output voltage corresponding to the distance between the metal material 4 and the coil 3 is generated from the amplifier 2. This output voltage is converted by a detector 7 into the DC voltage, which is recorded and displayed at a terminal 8.
COPYRIGHT: (C)1980,JPO&Japio
JP8391678A 1978-07-12 1978-07-12 Eddy current type range finder Granted JPS5512401A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8391678A JPS5512401A (en) 1978-07-12 1978-07-12 Eddy current type range finder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8391678A JPS5512401A (en) 1978-07-12 1978-07-12 Eddy current type range finder

Publications (2)

Publication Number Publication Date
JPS5512401A true JPS5512401A (en) 1980-01-29
JPS61921B2 JPS61921B2 (en) 1986-01-13

Family

ID=13815916

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8391678A Granted JPS5512401A (en) 1978-07-12 1978-07-12 Eddy current type range finder

Country Status (1)

Country Link
JP (1) JPS5512401A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57131005A (en) * 1980-10-07 1982-08-13 Mikurooepujiron Mesutehiniku G Temperature error compensation method and apparatus
JPH06135810A (en) * 1992-10-27 1994-05-17 Takasaki Kasei Kk Production of microbial material capable of suppressing soil disease and injury
JP2006300719A (en) * 2005-04-20 2006-11-02 Ribekkusu:Kk Measuring method and instrument
CN103792452A (en) * 2014-01-29 2014-05-14 重庆长安汽车股份有限公司 Superimposed alternating voltage test tester for automobile low-voltage electric appliance

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57131005A (en) * 1980-10-07 1982-08-13 Mikurooepujiron Mesutehiniku G Temperature error compensation method and apparatus
JPH06135810A (en) * 1992-10-27 1994-05-17 Takasaki Kasei Kk Production of microbial material capable of suppressing soil disease and injury
JP2006300719A (en) * 2005-04-20 2006-11-02 Ribekkusu:Kk Measuring method and instrument
JP4699797B2 (en) * 2005-04-20 2011-06-15 株式会社リベックス Measuring method and apparatus
CN103792452A (en) * 2014-01-29 2014-05-14 重庆长安汽车股份有限公司 Superimposed alternating voltage test tester for automobile low-voltage electric appliance

Also Published As

Publication number Publication date
JPS61921B2 (en) 1986-01-13

Similar Documents

Publication Publication Date Title
IT1194275B (en) "CONTACTLESS" HIGH THICKNESS GAUGE FOR METAL MATERIALS ABOVE CURIE TEMPERATURE
JPS5512401A (en) Eddy current type range finder
JPS5682443A (en) Transformation rate measuring apparatus of steel material
JPS5776451A (en) Measuring circuit for eddy current magnetic field
SE7904204L (en) ELECTRICAL METHODS WITH MAGNETOELECTRIC DEVICES
JPS55159102A (en) Thickness measuring method of nonmagnetic metal sheet
JPS5658666A (en) Avometer having impedance range
JPS5444735A (en) Leak detector with leak indicator
JPS55144556A (en) Surface potentiometer
JPS55144557A (en) Surface potentiometer
SU768018A1 (en) Inductive device for testing thermomagnetic properties of heated ferromagnetic material
JPS5557142A (en) Continuous liquid quality change measuring device by contactless method
JPS55119064A (en) Surface electrometer
JPS5572878A (en) Measuring method for variation rate of amplification factor of emitter earth direct current to direct-current collector current of transistor
JPS5624551A (en) Device for measuring corrosion speed of metal
JPS5529744A (en) Electric circuit device for displacement length measurement
JPS5495150A (en) Multiplier using hall element
JPS562571A (en) Measuring circuit for impedance of electric parts
JPS51140765A (en) Dc electric current measuring device
JPS57175932A (en) Measurment for internal stress
JPS5255571A (en) Resonance frequency measuring apparatus
JPS5679911A (en) Electromagnetic flowmeter
JPS5572877A (en) Measuring method for amplification factor of emitter earth direct-current to direct-current collector current of transistor
JPS55155265A (en) Device for measuring magnetic permeability
JPS56139269A (en) Measuring method of mold level in continuous casting