JPH0339263B2 - - Google Patents
Info
- Publication number
- JPH0339263B2 JPH0339263B2 JP57200591A JP20059182A JPH0339263B2 JP H0339263 B2 JPH0339263 B2 JP H0339263B2 JP 57200591 A JP57200591 A JP 57200591A JP 20059182 A JP20059182 A JP 20059182A JP H0339263 B2 JPH0339263 B2 JP H0339263B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- converter
- output
- output signal
- data
- 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 - Lifetime
Links
- 230000001360 synchronised effect Effects 0.000 claims description 32
- 238000001514 detection method Methods 0.000 claims description 21
- 230000007547 defect Effects 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 13
- 238000012545 processing Methods 0.000 claims description 12
- 230000010355 oscillation Effects 0.000 claims description 2
- 230000006870 function Effects 0.000 description 14
- 238000010586 diagram Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 10
- 230000003111 delayed effect Effects 0.000 description 6
- 230000002950 deficient Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 230000001934 delay Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005674 electromagnetic induction Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000009659 non-destructive testing Methods 0.000 description 2
- 230000010363 phase shift Effects 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000013500 data storage 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
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)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20059182A JPS5990044A (ja) | 1982-11-16 | 1982-11-16 | デイジタル式・渦流探傷装置 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20059182A JPS5990044A (ja) | 1982-11-16 | 1982-11-16 | デイジタル式・渦流探傷装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5990044A JPS5990044A (ja) | 1984-05-24 |
| JPH0339263B2 true JPH0339263B2 (ru) | 1991-06-13 |
Family
ID=16426890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20059182A Granted JPS5990044A (ja) | 1982-11-16 | 1982-11-16 | デイジタル式・渦流探傷装置 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5990044A (ru) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4594555A (en) * | 1984-10-29 | 1986-06-10 | Hewlett-Packard Company | Frequency selective sampling detector |
| JPH01223340A (ja) * | 1988-03-02 | 1989-09-06 | Idemitsu Eng Co Ltd | 渦流探傷方法および装置 |
| JP2525976Y2 (ja) * | 1990-06-14 | 1997-02-12 | 内橋エステック株式会社 | 合金型温度ヒューズ |
| JP2007225303A (ja) * | 2006-02-21 | 2007-09-06 | Jfe Steel Kk | 同期検波方法および装置、磁気計測方法および装置 |
| GB2457496B (en) * | 2008-02-15 | 2010-10-20 | Ge Inspection Technologies Ltd | A method and apparatus for phase sensitive detection of eddy current measurements |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50108984A (ru) * | 1974-02-02 | 1975-08-27 | ||
| JPS50112090A (ru) * | 1974-02-12 | 1975-09-03 |
-
1982
- 1982-11-16 JP JP20059182A patent/JPS5990044A/ja active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50108984A (ru) * | 1974-02-02 | 1975-08-27 | ||
| JPS50112090A (ru) * | 1974-02-12 | 1975-09-03 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5990044A (ja) | 1984-05-24 |
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