JPS5757202A - Eddy current range finder of feedback amplifying type - Google Patents

Eddy current range finder of feedback amplifying type

Info

Publication number
JPS5757202A
JPS5757202A JP13225180A JP13225180A JPS5757202A JP S5757202 A JPS5757202 A JP S5757202A JP 13225180 A JP13225180 A JP 13225180A JP 13225180 A JP13225180 A JP 13225180A JP S5757202 A JPS5757202 A JP S5757202A
Authority
JP
Japan
Prior art keywords
feedback
multiplier
eddy current
range finder
current 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.)
Pending
Application number
JP13225180A
Other languages
Japanese (ja)
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 JP13225180A priority Critical patent/JPS5757202A/en
Publication of JPS5757202A publication Critical patent/JPS5757202A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
    • G01B7/023—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness for measuring distance between sensor and object

Abstract

PURPOSE:To facilitate adjustment of feedback impedance and to permit arbitrary setting of range finding characteristics, by a meter wherein a multiplier having a DC voltage applying terminal on its input side is added in a feedback circuit of an eddy current range finder of feedback amplifying type. CONSTITUTION:A multiplier having a DC voltage applying terminal on its input side is added in a feedback circuit of an eddy current range finder of feedback amplifying type to permit adjustment of a feedback impedance. For example, in order to measure a distance between a detecting oil 3 and a measured material 1, a multiplier 7 having an input terminal X used for applying DC voltage is inserted in the feedback circuit of an amplifier 4 in addition to a feedback impedance Zs, the amplifier 4 functioning to amplify the voltage of a standard oscillator 2. By controlling the input to the multiplier, it becomes possible to arbitrarily set output characteristics in relation to a relative distance between the detecting coil 3 and the material to be measured.
JP13225180A 1980-09-25 1980-09-25 Eddy current range finder of feedback amplifying type Pending JPS5757202A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13225180A JPS5757202A (en) 1980-09-25 1980-09-25 Eddy current range finder of feedback amplifying type

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13225180A JPS5757202A (en) 1980-09-25 1980-09-25 Eddy current range finder of feedback amplifying type

Publications (1)

Publication Number Publication Date
JPS5757202A true JPS5757202A (en) 1982-04-06

Family

ID=15076899

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13225180A Pending JPS5757202A (en) 1980-09-25 1980-09-25 Eddy current range finder of feedback amplifying type

Country Status (1)

Country Link
JP (1) JPS5757202A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4716366A (en) * 1984-06-30 1987-12-29 Nippon Kokan K.K. Eddy current distance signal apparatus with temperature change compensation means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4716366A (en) * 1984-06-30 1987-12-29 Nippon Kokan K.K. Eddy current distance signal apparatus with temperature change compensation means

Similar Documents

Publication Publication Date Title
GB1512799A (en) Apparatus for non-contact measurement of distance between a metallic body and a detection coil
GB1528984A (en) Alternating current transformers
JPS5757202A (en) Eddy current range finder of feedback amplifying type
JPS5512401A (en) Eddy current type range finder
JPS6468664A (en) Peak holding circuit
JPS55105712A (en) Clipper type alternating current stabilizing circuit
JPS5677710A (en) Zero-point adjusting circuit
JPS5698913A (en) Temperature control circuit for amplifier
JPS5724804A (en) Detector for crack depth
GB1059219A (en) Apparatus for converting the ratio of two alternating electric signals into a direct current
JPS5717207A (en) Amplifying circuit
JPS57135373A (en) Power supply device for measuring electric power apparatus
JPS6486398A (en) Sample-and-hold circuit
JPS5490549A (en) Dc stabilized power source device
JPS55144556A (en) Surface potentiometer
SE334832B (en)
JPS54115295A (en) Moisture meter
JPS55119064A (en) Surface electrometer
JPS5761319A (en) Electronic variable resistor
JPS55149858A (en) Feedback type non-contact electrometer
JPS55153456A (en) Pulse transmission circuit
JPS5218389A (en) Electromagnetic induction type detecting device
JPS56111375A (en) Picture signal amplifying circuit
JPS5737910A (en) Negative feedback amplifier
JPS57188113A (en) Power amplifying circuit