JPS5460988A - Signal processing method of eddy current flaw detecting apparatus - Google Patents
Signal processing method of eddy current flaw detecting apparatusInfo
- Publication number
- JPS5460988A JPS5460988A JP12705277A JP12705277A JPS5460988A JP S5460988 A JPS5460988 A JP S5460988A JP 12705277 A JP12705277 A JP 12705277A JP 12705277 A JP12705277 A JP 12705277A JP S5460988 A JPS5460988 A JP S5460988A
- Authority
- JP
- Japan
- Prior art keywords
- phase difference
- measurement circuit
- standard
- bridge
- signal
- 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 surely discriminate various flaws by connecting two A/D converters to a phase difference measurement circuit and separately drawing out the unbalance voltage component of the bridge output signal and the phase difference of the brigde output for standard signal.
CONSTITUTION: A sine wave oscillator 1 of a frequency (f) and a bridge circuit 3 wherein the detection coil 2 cont nuously inserted with the object being examined is its arm are subsequently connected to an A/D converter 9. On the other hand, the oscillator 1 is connected to the A/D converter 9' via standard phase shifter 5. The respedtiv outputs thereof are inputted via peak detectors 10, 10' to a phase difference measurement circuit 11, from which the unbalance voltage component of the bridge output signal and the phase difference of the bridge output for a standard sine wave signal are separately drawn out. By inputting the output of the phase difference measurement circuit 11 directly into a computer, etc. and analyzing data in this way, the kinds of various flaws may be discriminated
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12705277A JPS5460988A (en) | 1977-10-22 | 1977-10-22 | Signal processing method of eddy current flaw detecting apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12705277A JPS5460988A (en) | 1977-10-22 | 1977-10-22 | Signal processing method of eddy current flaw detecting apparatus |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5460988A true JPS5460988A (en) | 1979-05-16 |
Family
ID=14950402
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12705277A Pending JPS5460988A (en) | 1977-10-22 | 1977-10-22 | Signal processing method of eddy current flaw detecting apparatus |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5460988A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4034817A1 (en) * | 1989-11-06 | 1991-05-08 | Gen Electric | DEVICE AND METHOD FOR IMPROVING THE eddy current |
-
1977
- 1977-10-22 JP JP12705277A patent/JPS5460988A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4034817A1 (en) * | 1989-11-06 | 1991-05-08 | Gen Electric | DEVICE AND METHOD FOR IMPROVING THE eddy current |
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