SE8102978L - Sett och apparat for att undertrycka brus under icke forstorande virvelstromprovning - Google Patents
Sett och apparat for att undertrycka brus under icke forstorande virvelstromprovningInfo
- Publication number
- SE8102978L SE8102978L SE8102978A SE8102978A SE8102978L SE 8102978 L SE8102978 L SE 8102978L SE 8102978 A SE8102978 A SE 8102978A SE 8102978 A SE8102978 A SE 8102978A SE 8102978 L SE8102978 L SE 8102978L
- Authority
- SE
- Sweden
- Prior art keywords
- surfacturing
- appliance
- breaking
- test
- during non
- Prior art date
Links
Classifications
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/149,828 US4368429A (en) | 1980-05-15 | 1980-05-15 | Method and apparatus for suppressing noise during nondestructive eddy current testing |
Publications (2)
Publication Number | Publication Date |
---|---|
SE8102978L true SE8102978L (sv) | 1981-11-16 |
SE453019B SE453019B (sv) | 1988-01-04 |
Family
ID=22531964
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8102978A SE453019B (sv) | 1980-05-15 | 1981-05-12 | Apparat for undersokning av metalliska arbetsstycken |
Country Status (3)
Country | Link |
---|---|
US (1) | US4368429A (sv) |
CA (1) | CA1178339A (sv) |
SE (1) | SE453019B (sv) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4532442A (en) * | 1981-10-23 | 1985-07-30 | Black Ian A | Noise reduction in electronic measuring circuits |
US4718559A (en) * | 1982-07-12 | 1988-01-12 | Magnetic Separation Systems, Inc. | Process for recovery of non-ferrous metallic concentrate from solid waste |
SE436228B (sv) * | 1982-11-24 | 1984-11-19 | Bengt Hjalmar Tornblom | Anordning for kontroll av objekt med avseende pa forendringar |
US4644272A (en) * | 1984-07-31 | 1987-02-17 | Republic Steel Corporation | Hot annealed weld inspection |
US4947361A (en) * | 1988-09-28 | 1990-08-07 | Unisys Corporation | Narrowband parameter estimator |
US5210492A (en) * | 1991-04-22 | 1993-05-11 | Tokyo Gas Co., Ltd. | Remote field eddy current flaw detector for metal pipes having a pair of receiver coils providing a differential offset amplitude signal |
US5442593A (en) * | 1993-04-16 | 1995-08-15 | The Charles Stark Draper Laboratory, Inc. | Apparatus and method of nulling discrete frequency noise signals |
GB0209333D0 (en) * | 2002-04-24 | 2002-06-05 | Electrical Testing Ltd | Defect detection device |
US7738617B1 (en) * | 2004-09-29 | 2010-06-15 | Pmc-Sierra, Inc. | Clock and data recovery locking technique for large frequency offsets |
US7557570B2 (en) * | 2005-11-03 | 2009-07-07 | The Clock Spring Company L.P. | System and method for producing color contour maps of surface defects of high pressure pipelines |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3375451A (en) * | 1965-06-17 | 1968-03-26 | Nasa Usa | Adaptive tracking notch filter system |
US3526842A (en) * | 1967-05-05 | 1970-09-01 | Bell Telephone Labor Inc | Apparatus for detecting signal in presence of noise and for simultaneously determining frequency and phase of detected signal |
US3961172A (en) * | 1973-12-03 | 1976-06-01 | Robert Stewart Hutcheon | Real-time cross-correlation signal processor |
GB1466288A (en) * | 1974-07-20 | 1977-03-02 | Ferranti Ltd | Discrimination circuit arrangements |
US4037095A (en) * | 1974-09-18 | 1977-07-19 | The Broken Hill Proprietary Company Limited | Signal stabilizing circuits |
US4027264A (en) * | 1976-02-24 | 1977-05-31 | The United States Of America As Represented By The Secretary Of The Army | Phase lock loop multitone interference canceling system |
US4061968A (en) * | 1976-09-07 | 1977-12-06 | Commissariat A L'energie Atomique | Process of and apparatus for non-destructive eddy current testing involves the suppression of displayed lobes corresponding to fault parameters to be eliminated from the display |
DE2850433A1 (de) * | 1977-11-22 | 1979-05-23 | British Steel Corp | Vorrichtung zum auffinden von oberflaechenfehlern an werkstuecken |
US4215310A (en) * | 1978-07-10 | 1980-07-29 | United States Steel Corporation | Magnetic testing method and apparatus having provision for eliminating inaccuracies caused by gaps between probe and test piece |
-
1980
- 1980-05-15 US US06/149,828 patent/US4368429A/en not_active Expired - Lifetime
- 1980-11-17 CA CA000364838A patent/CA1178339A/en not_active Expired
-
1981
- 1981-05-12 SE SE8102978A patent/SE453019B/sv not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
SE453019B (sv) | 1988-01-04 |
CA1178339A (en) | 1984-11-20 |
US4368429A (en) | 1983-01-11 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
NUG | Patent has lapsed |
Ref document number: 8102978-7 Effective date: 19910123 Format of ref document f/p: F |