CA1060970A - Apparatus and method for improving signal discrimination in an electronic detection system - Google Patents
Apparatus and method for improving signal discrimination in an electronic detection systemInfo
- Publication number
- CA1060970A CA1060970A CA225,996A CA225996A CA1060970A CA 1060970 A CA1060970 A CA 1060970A CA 225996 A CA225996 A CA 225996A CA 1060970 A CA1060970 A CA 1060970A
- Authority
- CA
- Canada
- Prior art keywords
- pulse
- period
- signal
- detector
- gate
- 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.)
- Expired
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)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Remote Sensing (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (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 |
|---|---|
| CA1060970A true CA1060970A (en) | 1979-08-21 |
Family
ID=23880398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA225,996A Expired CA1060970A (en) | 1974-05-28 | 1975-04-29 | Apparatus and method for improving signal discrimination in an electronic detection system |
Country Status (19)
Families Citing this family (4)
| 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 |
| JPH0518715Y2 (US06262066-20010717-C00315.png) * | 1987-12-15 | 1993-05-18 |
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 ZA ZA00752757A patent/ZA752757B/xx unknown
- 1975-04-29 CA CA225,996A patent/CA1060970A/en not_active Expired
- 1975-05-02 AU AU80771/75A patent/AU498275B2/en not_active Expired
- 1975-05-02 ES ES437399A patent/ES437399A1/es 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 LU LU72552A patent/LU72552A1/xx unknown
- 1975-05-22 BR BR4118/75D patent/BR7503216A/pt unknown
- 1975-05-23 SE SE7505919A patent/SE401954B/xx unknown
- 1975-05-26 DE DE19752523677 patent/DE2523677A1/de not_active Withdrawn
- 1975-05-27 NO NO751865A patent/NO751865L/no unknown
- 1975-05-27 DK DK233975A patent/DK233975A/da unknown
- 1975-05-27 JP JP50063400A patent/JPS517954A/ja active Pending
- 1975-05-27 IT IT23763/75A patent/IT1038533B/it active
- 1975-05-28 NL NL7506305A patent/NL7506305A/xx not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| AU8077175A (en) | 1976-11-04 |
| BE829255A (fr) | 1975-09-15 |
| NO751865L (US06262066-20010717-C00315.png) | 1975-12-01 |
| BR7503216A (pt) | 1976-04-20 |
| GB1505186A (en) | 1978-03-30 |
| NL7506305A (nl) | 1975-12-02 |
| FR2273288A1 (US06262066-20010717-C00315.png) | 1975-12-26 |
| TR19739A (tr) | 1979-10-25 |
| SE401954B (sv) | 1978-06-05 |
| DK233975A (da) | 1975-11-29 |
| ES437399A1 (es) | 1977-01-16 |
| US3949293A (en) | 1976-04-06 |
| AU498275B2 (en) | 1979-03-01 |
| SE7505919L (sv) | 1975-12-01 |
| ZA752757B (en) | 1976-04-28 |
| JPS517954A (US06262066-20010717-C00315.png) | 1976-01-22 |
| DE2523677A1 (de) | 1975-12-11 |
| IT1038533B (it) | 1979-11-30 |
| AR204664A1 (es) | 1976-02-20 |
| LU72552A1 (US06262066-20010717-C00315.png) | 1975-10-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1069208A (en) | Multiple sheet detecting apparatus | |
| US4536709A (en) | Detecting device having spaced transmitting and receiving coils for detecting a metal strip embedded in paper money | |
| US5537038A (en) | Magnetic flux measuring method and apparatus for detecting high frequency components of magnetic flux with high speed orientation | |
| US4158832A (en) | Seismic apparatus for discrimination between track-type vehicles and wheel-type vehicles | |
| ES8703020A1 (es) | Procedimiento y su correspondiente dispositivo de deteccion por corrientes de foncault, de defectos tipicos sobre un producto. | |
| CA1060970A (en) | Apparatus and method for improving signal discrimination in an electronic detection system | |
| KR850000883A (ko) | 디지탈 신호 처리장치 | |
| DE59504864D1 (de) | Verfahren und Vorrichtung zur Drehzahlerfassung | |
| KR920002856B1 (ko) | 경화판별장치 | |
| US5432442A (en) | Speed sensor including output signal proportional to air gap size | |
| US4692692A (en) | Electronic apparatus for detecting stray variations in an electrical voltage as a function of time | |
| US4193028A (en) | Eddy current instrumentation circuitry for distinguishing flaw signals from spurious noise signals | |
| US2901609A (en) | Differentiator | |
| JPS57179682A (en) | Metal detector | |
| JPS56126764A (en) | Detecting circuit for rotational angle signal | |
| JPH0712953A (ja) | 金属検出装置 | |
| RU2190866C2 (ru) | Металлообнаружитель | |
| RU1798234C (ru) | Приемник дл путевой автоблокировки | |
| JPH01248050A (ja) | 漏洩磁束探傷装置 | |
| SU637654A1 (ru) | Электромагнитный дефектоскоп | |
| JPH0514858B2 (US06262066-20010717-C00315.png) | ||
| JP2653688B2 (ja) | 寸法測定装置 | |
| JPS5836305B2 (ja) | 内外面疵弁別装置 | |
| RU2098848C1 (ru) | Металлообнаружитель | |
| JPH0514449B2 (US06262066-20010717-C00315.png) |
