FR2476318A1 - Appareil de controle par courants de foucault, destine a detecter les defauts de surface de pieces metalliques - Google Patents
Appareil de controle par courants de foucault, destine a detecter les defauts de surface de pieces metalliques Download PDFInfo
- Publication number
- FR2476318A1 FR2476318A1 FR8102162A FR8102162A FR2476318A1 FR 2476318 A1 FR2476318 A1 FR 2476318A1 FR 8102162 A FR8102162 A FR 8102162A FR 8102162 A FR8102162 A FR 8102162A FR 2476318 A1 FR2476318 A1 FR 2476318A1
- Authority
- FR
- France
- Prior art keywords
- control
- frequency
- coil
- demodulator
- eddy current
- 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
- 239000002184 metal Substances 0.000 title claims abstract description 5
- 230000003321 amplification Effects 0.000 claims abstract description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 6
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 230000033228 biological regulation Effects 0.000 claims description 15
- 230000007547 defect Effects 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000006870 function Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
- G01N27/9053—Compensating for probe to workpiece spacing
-
- 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 |
|---|---|---|---|
| DE3005915A DE3005915C2 (de) | 1980-02-16 | 1980-02-16 | Wirbelstromprüfgerät für Oberflächenfehler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2476318A1 true FR2476318A1 (fr) | 1981-08-21 |
| FR2476318B1 FR2476318B1 (enrdf_load_stackoverflow) | 1984-07-13 |
Family
ID=6094846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR8102162A Granted FR2476318A1 (fr) | 1980-02-16 | 1981-02-04 | Appareil de controle par courants de foucault, destine a detecter les defauts de surface de pieces metalliques |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE3005915C2 (enrdf_load_stackoverflow) |
| FR (1) | FR2476318A1 (enrdf_load_stackoverflow) |
| GB (1) | GB2069708A (enrdf_load_stackoverflow) |
| IT (1) | IT1135435B (enrdf_load_stackoverflow) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2141234B (en) * | 1983-06-07 | 1986-11-12 | Mo Energeticheskij Institut | Eddy-current flaw detector |
| DE3824948A1 (de) * | 1988-07-22 | 1990-01-25 | Fiz Energet I An Latvssr | Wirbelstrom-einrichtung zur zerstoerungsfreien pruefung |
| DE4003330A1 (de) * | 1990-02-05 | 1991-08-08 | Foerster Inst Dr Friedrich | Wirbelstrompruefgeraet |
| JP2008089328A (ja) | 2006-09-29 | 2008-04-17 | Hitachi Ltd | 渦電流探傷装置及び渦電流探傷方法 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB596182A (en) * | 1945-07-24 | 1947-12-30 | British Thomson Houston Co Ltd | Improvements relating to apparatus for detecting flaws in metal wire |
| GB870487A (en) * | 1958-01-24 | 1961-06-14 | Republic Steel Corp | Flaw detecting device |
| FR2065234A5 (enrdf_load_stackoverflow) * | 1969-10-10 | 1971-07-23 | Automation Ind Inc | |
| FR2124952A5 (enrdf_load_stackoverflow) * | 1971-02-01 | 1972-09-22 | Automation Ind Inc | |
| FR2337340A1 (fr) * | 1975-12-29 | 1977-07-29 | Law Engineers K J | Procede et appareil de mesure d'une caracteristique d'une matiere |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1475517A (en) * | 1974-06-27 | 1977-06-01 | British Steel Corp | Detection of surface defects in elongate metallic members |
| DE2850433A1 (de) * | 1977-11-22 | 1979-05-23 | British Steel Corp | Vorrichtung zum auffinden von oberflaechenfehlern an werkstuecken |
-
1980
- 1980-02-16 DE DE3005915A patent/DE3005915C2/de not_active Expired
-
1981
- 1981-02-04 FR FR8102162A patent/FR2476318A1/fr active Granted
- 1981-02-12 IT IT19687/81A patent/IT1135435B/it active
- 1981-02-13 GB GB8104508A patent/GB2069708A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB596182A (en) * | 1945-07-24 | 1947-12-30 | British Thomson Houston Co Ltd | Improvements relating to apparatus for detecting flaws in metal wire |
| GB870487A (en) * | 1958-01-24 | 1961-06-14 | Republic Steel Corp | Flaw detecting device |
| FR2065234A5 (enrdf_load_stackoverflow) * | 1969-10-10 | 1971-07-23 | Automation Ind Inc | |
| FR2124952A5 (enrdf_load_stackoverflow) * | 1971-02-01 | 1972-09-22 | Automation Ind Inc | |
| FR2337340A1 (fr) * | 1975-12-29 | 1977-07-29 | Law Engineers K J | Procede et appareil de mesure d'une caracteristique d'une matiere |
Also Published As
| Publication number | Publication date |
|---|---|
| IT8119687A0 (it) | 1981-02-12 |
| FR2476318B1 (enrdf_load_stackoverflow) | 1984-07-13 |
| DE3005915C2 (de) | 1985-01-10 |
| DE3005915A1 (de) | 1981-08-27 |
| IT1135435B (it) | 1986-08-20 |
| GB2069708A (en) | 1981-08-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0123602B1 (fr) | Procédé et dispositif de mesure de précision de la hauteur des aubes d'un rotor | |
| EP0042780B1 (fr) | Dispositif de mesure des fréquences de résonnance des aubes de turbines, de compresseurs et de pales d'hélices | |
| CH624220A5 (enrdf_load_stackoverflow) | ||
| FR2522149A1 (fr) | Procede et appareil de controle de defauts de surface d'une vis | |
| EP0374606B1 (fr) | Procédé et dispositif de positionnement angulaire d'une pièce sur une machine-outil au moyen d'un faisceau laser | |
| EP0332508B1 (fr) | Appareil d'analyse par ellipsométrie, procédé d'analyse ellipsométrique d'un échantillon et application à la mesure de variation d'épaisseur des couches minces | |
| CA1296545C (fr) | Dispositif pour determiner en continu un indice d'etat de surface d'une feuille crepee en mouvement | |
| FR2476318A1 (fr) | Appareil de controle par courants de foucault, destine a detecter les defauts de surface de pieces metalliques | |
| CN109374130A (zh) | 一种带通可调的滤光器及滤光方法 | |
| CA3015291C (fr) | Dispositif detecteur inductif de facteur 1 | |
| CH620620A5 (enrdf_load_stackoverflow) | ||
| US3360651A (en) | Web inspection device with modified defect signal control | |
| CH413430A (fr) | Procédé de mesure des caractéristiques de frottement interne d'un échantillon et dispositif pour la mise en oeuvre de ce procédé | |
| EP0080410A1 (fr) | Dispositif pour déterminer et suivre les coordonnées instantanées de l'extremum d'une courbe y = f(x), caractéristique d'un système comportant une entrée x et une sortie y | |
| EP1586858B1 (fr) | Procédé de commande en push-pull d'un gyrometre à laser | |
| FR2666656A1 (fr) | Procede et dispositif d'inspection d'une structure par analyse modale. | |
| EP0535103A1 (fr) | Procede de controle de l'efficacite d'ondes de pression emises par un generateur d'ondes de pression. | |
| FR2695723A1 (fr) | Procédé et dispositif pour la surveillance et le contrôle d'une machine par analyse des vibrations. | |
| EP3224571B1 (fr) | Dispositif de caractérisation par interférométrie, et procédé correspondant | |
| EP3887801B1 (fr) | Capteur de gaz comportant une source de lumière impulsionnelle | |
| US3219924A (en) | Automatic location of maxima or minima in response curves of waveresponsive media | |
| FR2656169A1 (fr) | Dispositif d'asservissement en puissance d'un laser. | |
| WO2024246472A1 (fr) | Procede de controle non invasif d'usure d'une aube de turbomachine | |
| FR2726656A1 (fr) | Procede d'optimisation d'un appareil de mesure numerique presentant deux modes, rapide et lent, de conversion analogique-numerique et appareil pour sa mise en oeuvre | |
| FR2468905A1 (fr) | Procede et dispositif pour la determination de l'endommagement par fatigue d'une piece mecanique |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |