JPS517954A - - Google Patents
Info
- Publication number
- JPS517954A JPS517954A JP50063400A JP6340075A JPS517954A JP S517954 A JPS517954 A JP S517954A JP 50063400 A JP50063400 A JP 50063400A JP 6340075 A JP6340075 A JP 6340075A JP S517954 A JPS517954 A JP S517954A
- Authority
- JP
- Japan
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/08—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices
- G01V3/10—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation operating with magnetic or electric fields produced or modified by objects or geological structures or by detecting devices using induction coils
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9046—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents by analysing electrical signals
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9046—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents by analysing electrical signals
- G01N27/906—Compensating for velocity
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Immunology (AREA)
- Pathology (AREA)
- General Health & Medical Sciences (AREA)
- Remote Sensing (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Geophysics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- Geophysics And Detection Of Objects (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/473,643 US3949293A (en) | 1974-05-28 | 1974-05-28 | Apparatus and method for detecting a moving metal mass including means to discriminate signals having a particular period |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS517954A true JPS517954A (US20100056889A1-20100304-C00004.png) | 1976-01-22 |
Family
ID=23880398
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP50063400A Pending JPS517954A (US20100056889A1-20100304-C00004.png) | 1974-05-28 | 1975-05-27 |
Country Status (19)
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0193582U (US20100056889A1-20100304-C00004.png) * | 1987-12-15 | 1989-06-20 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2412081A1 (fr) * | 1977-12-19 | 1979-07-13 | Fadico | Dispositif de detection de la presence d'une piece mecanique, muni d'organes assurant la securite du fonctionnement vis-a-vis de defauts d'isolement dans le circuit du capteur |
US4193028A (en) * | 1978-05-05 | 1980-03-11 | Honeywell Inc. | Eddy current instrumentation circuitry for distinguishing flaw signals from spurious noise signals |
GB2136580B (en) * | 1983-03-16 | 1987-11-18 | Thyssen Industrie | Method and apparatus for determining the distance from a conductor |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2577827A (en) * | 1945-10-30 | 1951-12-11 | Charles B Tompkins | Pulse recognition device |
US2648766A (en) * | 1950-04-19 | 1953-08-11 | Rca Corp | Pulse width discriminator |
US3065412A (en) * | 1958-12-23 | 1962-11-20 | Union Carbide Corp | Metal detector |
US3523253A (en) * | 1966-04-15 | 1970-08-04 | Electronic Memories & Magnetic | Coupling network |
US3609563A (en) * | 1968-11-12 | 1971-09-28 | Coditron Corp | Frequency detector |
US3706027A (en) * | 1971-07-13 | 1972-12-12 | Karl R Grice Jr | Materials counting system utilizing permanent magnets and their associated fields |
-
1974
- 1974-05-28 US US05/473,643 patent/US3949293A/en not_active Expired - Lifetime
-
1975
- 1975-01-01 AR AR258711A patent/AR204664A1/es active
- 1975-04-29 CA CA225,996A patent/CA1060970A/en not_active Expired
- 1975-04-29 ZA ZA00752757A patent/ZA752757B/xx unknown
- 1975-05-02 ES ES437399A patent/ES437399A1/es not_active Expired
- 1975-05-02 AU AU80771/75A patent/AU498275B2/en not_active Expired
- 1975-05-02 GB GB18412/75A patent/GB1505186A/en not_active Expired
- 1975-05-15 FR FR7515240A patent/FR2273288A1/fr not_active Withdrawn
- 1975-05-16 TR TR19739A patent/TR19739A/xx unknown
- 1975-05-20 BE BE156503A patent/BE829255A/xx unknown
- 1975-05-22 BR BR4118/75D patent/BR7503216A/pt unknown
- 1975-05-22 LU LU72552A patent/LU72552A1/xx unknown
- 1975-05-23 SE SE7505919A patent/SE401954B/xx unknown
- 1975-05-26 DE DE19752523677 patent/DE2523677A1/de not_active Withdrawn
- 1975-05-27 IT IT23763/75A patent/IT1038533B/it active
- 1975-05-27 JP JP50063400A patent/JPS517954A/ja active Pending
- 1975-05-27 DK DK233975A patent/DK233975A/da unknown
- 1975-05-27 NO NO751865A patent/NO751865L/no unknown
- 1975-05-28 NL NL7506305A patent/NL7506305A/xx not_active Application Discontinuation
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0193582U (US20100056889A1-20100304-C00004.png) * | 1987-12-15 | 1989-06-20 | ||
JPH0518715Y2 (US20100056889A1-20100304-C00004.png) * | 1987-12-15 | 1993-05-18 |
Also Published As
Publication number | Publication date |
---|---|
ZA752757B (en) | 1976-04-28 |
NO751865L (US20100056889A1-20100304-C00004.png) | 1975-12-01 |
ES437399A1 (es) | 1977-01-16 |
FR2273288A1 (US20100056889A1-20100304-C00004.png) | 1975-12-26 |
AU498275B2 (en) | 1979-03-01 |
CA1060970A (en) | 1979-08-21 |
IT1038533B (it) | 1979-11-30 |
SE401954B (sv) | 1978-06-05 |
DK233975A (da) | 1975-11-29 |
AR204664A1 (es) | 1976-02-20 |
US3949293A (en) | 1976-04-06 |
BE829255A (fr) | 1975-09-15 |
BR7503216A (pt) | 1976-04-20 |
GB1505186A (en) | 1978-03-30 |
DE2523677A1 (de) | 1975-12-11 |
SE7505919L (sv) | 1975-12-01 |
LU72552A1 (US20100056889A1-20100304-C00004.png) | 1975-10-08 |
NL7506305A (nl) | 1975-12-02 |
AU8077175A (en) | 1976-11-04 |
TR19739A (tr) | 1979-10-25 |