JPS5612502A - Feedback amplification type vortex flow range finder - Google Patents
Feedback amplification type vortex flow range finderInfo
- 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
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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
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
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)
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)
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 |
WO1997021070A1 (en) * | 1995-12-05 | 1997-06-12 | 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)
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 |
-
1979
- 1979-07-12 JP JP8747279A patent/JPS5612502A/en active Granted
-
1980
- 1980-07-08 GB GB8022329A patent/GB2054867B/en not_active Expired
- 1980-07-09 FR FR8015249A patent/FR2461233A1/en active Granted
- 1980-07-11 DE DE19803026389 patent/DE3026389C2/en not_active Expired
Cited By (3)
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 |
---|---|
FR2461233B1 (en) | 1983-05-13 |
JPS623881B2 (en) | 1987-01-27 |
GB2054867A (en) | 1981-02-18 |
GB2054867B (en) | 1983-06-29 |
DE3026389A1 (en) | 1981-01-15 |
DE3026389C2 (en) | 1984-04-19 |
FR2461233A1 (en) | 1981-01-30 |
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