JPS5610248A - Eddy current flaw detector for metal wire - Google Patents
Eddy current flaw detector for metal wireInfo
- Publication number
- JPS5610248A JPS5610248A JP8502379A JP8502379A JPS5610248A JP S5610248 A JPS5610248 A JP S5610248A JP 8502379 A JP8502379 A JP 8502379A JP 8502379 A JP8502379 A JP 8502379A JP S5610248 A JPS5610248 A JP S5610248A
- Authority
- JP
- Japan
- Prior art keywords
- signals
- phase
- detected
- metal wire
- synchronizing
- 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.)
- Pending
Links
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
PURPOSE: To remove noise signals proper to metal wire effectively by automatically setting the phase of synchronizing signals used for obtaining only signals corresponding to flaw signals.
CONSTITUTION: Detected signals including flaw signals and noise signals pass through a search coil 14, an AC bridge circuit 16 and a high frequency amplification circuit 18 and are phase-detected by a phase detector 20. On the other hand, a detected signal 3 from the high frequency amplifier 18 is phase-detected by phase detectors 32A, 32B using 0° and 90° snychronizing signals 2A, 2B obtained by phase-shifting a synchronizing signal 2 from an oscillator 12 with a phase shifter 30 as standard signals and becomes analog signals corresponding to the phase differences from the standard signals. These analog signals are inputted to a differential amplifier 38 via filters 34A, 34B and both side detectors 36A, 36B. The output of the differential amplifier 38 drives a servo motor 28. Synchronizing signals from the oscillator 12 are phase-shifted by the servo motor 28.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8502379A JPS5610248A (en) | 1979-07-06 | 1979-07-06 | Eddy current flaw detector for metal wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8502379A JPS5610248A (en) | 1979-07-06 | 1979-07-06 | Eddy current flaw detector for metal wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5610248A true JPS5610248A (en) | 1981-02-02 |
Family
ID=13847122
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8502379A Pending JPS5610248A (en) | 1979-07-06 | 1979-07-06 | Eddy current flaw detector for metal wire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5610248A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6287607A (en) * | 1985-10-11 | 1987-04-22 | Nissan Motor Co Ltd | Evaporative cooling device of internal combustion engine |
| JPH04102534A (en) * | 1990-08-22 | 1992-04-03 | Yakult Honsha Co Ltd | Packing method by heat-shrinkable film |
-
1979
- 1979-07-06 JP JP8502379A patent/JPS5610248A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6287607A (en) * | 1985-10-11 | 1987-04-22 | Nissan Motor Co Ltd | Evaporative cooling device of internal combustion engine |
| JPH04102534A (en) * | 1990-08-22 | 1992-04-03 | Yakult Honsha Co Ltd | Packing method by heat-shrinkable film |
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