JPS5612502A - Feedback amplification type vortex flow range finder - Google Patents

Feedback amplification type vortex flow range finder

Info

Publication number
JPS5612502A
JPS5612502A JP8747279A JP8747279A JPS5612502A JP S5612502 A JPS5612502 A JP S5612502A JP 8747279 A JP8747279 A JP 8747279A JP 8747279 A JP8747279 A JP 8747279A JP S5612502 A JPS5612502 A JP S5612502A
Authority
JP
Japan
Prior art keywords
type oscillator
output voltage
range finder
vortex flow
detecting coil
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
JP8747279A
Other languages
Japanese (ja)
Other versions
JPS623881B2 (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 JP8747279A priority Critical patent/JPS5612502A/en
Priority to GB8022329A priority patent/GB2054867B/en
Priority to FR8015249A priority patent/FR2461233A1/en
Priority to DE19803026389 priority patent/DE3026389C2/en
Publication of JPS5612502A publication Critical patent/JPS5612502A/en
Publication of JPS623881B2 publication Critical patent/JPS623881B2/ja
Granted 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 compensate the change in temperature automatically by an arrangement wherein oscillation frequency of a basic oscillator is changed corresponding to the inductance of a detecting coil and feedback impedance is replaced with resistance to keep the feedback ratio at constant even when the detecting coil is subjected to the temperature change.
CONSTITUTION: There are provided a capacitor CO being connected with a detecting coil 3 to constitute a resonance circuit, a V-F type oscillator 5 output voltage thereof is supplied to an amplifier 4, and a phase detector 6 which receives output voltages from the V-F type oscillator 5 and the amplifier 4 and produces output voltage corresponding to a phase difference between these inputs. Output voltage of the phase detector 6 is supplied to the V-F type oscillator 5 so as to control the oscillation frequency of the V-F type oscillator 5.
COPYRIGHT: (C)1981,JPO&Japio
JP8747279A 1979-07-12 1979-07-12 Feedback amplification type vortex flow range finder Granted JPS5612502A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP8747279A JPS5612502A (en) 1979-07-12 1979-07-12 Feedback amplification type vortex flow range finder
GB8022329A GB2054867B (en) 1979-07-12 1980-07-08 Eddy-current distance measuring apparatus
FR8015249A FR2461233A1 (en) 1979-07-12 1980-07-09 FOUCAULT CURRENT DISTANCE MEASURING APPARATUS USING A POSITIVE REACTION AMPLIFIER
DE19803026389 DE3026389C2 (en) 1979-07-12 1980-07-11 Device for distance measurement using eddy currents with a feedback amplifier

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8747279A JPS5612502A (en) 1979-07-12 1979-07-12 Feedback amplification type vortex flow range finder

Publications (2)

Publication Number Publication Date
JPS5612502A true JPS5612502A (en) 1981-02-06
JPS623881B2 JPS623881B2 (en) 1987-01-27

Family

ID=13915846

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8747279A Granted JPS5612502A (en) 1979-07-12 1979-07-12 Feedback amplification type vortex flow range finder

Country Status (4)

Country Link
JP (1) JPS5612502A (en)
DE (1) DE3026389C2 (en)
FR (1) FR2461233A1 (en)
GB (1) GB2054867B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59181903A (en) * 1983-03-16 1984-10-16 テイツセン・インドウストリ−・アクチエンゲゼルシヤフト Method and device for adjusting interval of magnetic sensor from conductive reaction orbit
JPS6093316A (en) * 1983-10-27 1985-05-25 Nippon Kokan Kk <Nkk> Eddy current type hot water level measuring method

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3409448A1 (en) * 1983-03-16 1984-09-20 Thyssen Industrie Ag, 4300 Essen Method and device for determining the distance of a magnetic probe from a conductive reaction rail
DE3420330C1 (en) * 1984-05-30 1985-12-05 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln Inductive sensor and method for non-contact, three-dimensional position detection of holes, bores, bolts, rivets etc. in or on metal parts by means of such a sensor
JPS6114501A (en) * 1984-06-30 1986-01-22 Nippon Kokan Kk <Nkk> Eddy current type range finder
IT1209599B (en) * 1984-11-15 1989-08-30 Siette Spa LEVEL DETECTION SYSTEM FOR VEHICLES.
FR2575820B1 (en) * 1985-01-10 1992-07-24 Equip Construction Electriq METHOD AND DEVICE FOR MEASURING THE DISTANCE BETWEEN A TARGET AND A SENSOR
SE456606B (en) * 1987-02-18 1988-10-17 Tornbloms Kvalitetskontroll Ab DEVICE AND / OR TEST DIMENSION AND / OR DISTANCE SAFETY DEVICE
DE3815010A1 (en) * 1988-04-30 1989-11-09 Leybold Ag CIRCUIT ARRANGEMENT FOR THE COMBINED USE OF AN INDUCTIVE AND A CAPACITIVE DEVICE FOR THE DESTRUCTION-FREE MEASUREMENT OF THE RESISTANT THIN LAYERS
FR2638837A1 (en) * 1988-11-10 1990-05-11 Phytrans Method for detecting the temperature drift of the response signal of an inductive sensor and device for its implementation
AU1145797A (en) * 1995-12-05 1997-06-27 Skf Condition Monitoring Driver for eddy current proximity probe
US5854553A (en) * 1996-06-19 1998-12-29 Skf Condition Monitoring Digitally linearizing eddy current probe
JP2017054354A (en) 2015-09-10 2017-03-16 株式会社東芝 Thickness detection device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3213694A (en) * 1963-03-11 1965-10-26 Palomar Scient Corp Stabilized transducer system for measuring displacement and acceleration
US3851242A (en) * 1972-06-27 1974-11-26 J Ellis Frequency-modulated eddy-current proximity gage
GB1512799A (en) * 1974-11-06 1978-06-01 Nippon Kokan Kk Apparatus for non-contact measurement of distance between a metallic body and a detection coil
US4160204A (en) * 1974-11-11 1979-07-03 Kaman Sciences Corporation Non-contact distance measurement system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59181903A (en) * 1983-03-16 1984-10-16 テイツセン・インドウストリ−・アクチエンゲゼルシヤフト Method and device for adjusting interval of magnetic sensor from conductive reaction orbit
JPS6093316A (en) * 1983-10-27 1985-05-25 Nippon Kokan Kk <Nkk> Eddy current type hot water level measuring method
JPH0242416B2 (en) * 1983-10-27 1990-09-21

Also Published As

Publication number Publication date
DE3026389C2 (en) 1984-04-19
FR2461233B1 (en) 1983-05-13
FR2461233A1 (en) 1981-01-30
JPS623881B2 (en) 1987-01-27
DE3026389A1 (en) 1981-01-15
GB2054867B (en) 1983-06-29
GB2054867A (en) 1981-02-18

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