JPS5626254A - Eddy current flaw detector - Google Patents
Eddy current flaw detectorInfo
- Publication number
- JPS5626254A JPS5626254A JP10264279A JP10264279A JPS5626254A JP S5626254 A JPS5626254 A JP S5626254A JP 10264279 A JP10264279 A JP 10264279A JP 10264279 A JP10264279 A JP 10264279A JP S5626254 A JPS5626254 A JP S5626254A
- Authority
- JP
- Japan
- Prior art keywords
- phase
- amplitude
- voltage
- circuit
- terminals
- 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
Landscapes
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
Abstract
PURPOSE: To ensure an independent processing for both the amplitude and the phase of the signal component, by connecting the output voltage of the bridge circuit to the phase regularizing circuit via the amplitude regularizing circuit and then obtaining the impedance variation of the bridge circuit.
CONSTITUTION: When the impedances of coils L1 and L2 of bridge circuit 101 vary, a difference is caused between the phase and the amplitude of the voltage between terminals A and B. For the amplitude, the voltage between terminals B and C is rectified by rectifiers 13 and 12 of amplitude regularizing circuit 102, the differential voltage is extracted via subtractor 14, and then this differential voltage is used to control automatic gain controller 11 to secure the equal voltage amplitude between terminals B and C. For the phase, phase wave detector 17 of phase regularizing circuit 103 delivers the DC voltage proportional to the phase difference between the signals of terminals B and D having an equal amplitude, and thus phase circuit 15 is controlled to give a control to secure the same phase for the voltage of terminals B and D each. Accordingly, output 19 of subtractor 18 becomes zero with a gentle change of the impedance, and then the signal of the sudden impedance change due to the flaw detection is delivered.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10264279A JPS5927863B2 (en) | 1979-08-11 | 1979-08-11 | Eddy current flaw detection equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10264279A JPS5927863B2 (en) | 1979-08-11 | 1979-08-11 | Eddy current flaw detection equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5626254A true JPS5626254A (en) | 1981-03-13 |
JPS5927863B2 JPS5927863B2 (en) | 1984-07-09 |
Family
ID=14332884
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10264279A Expired JPS5927863B2 (en) | 1979-08-11 | 1979-08-11 | Eddy current flaw detection equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5927863B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5623289A (en) * | 1989-06-02 | 1997-04-22 | Canon Kabushiki Kaisha | Facsimile apparatus with ink ejection recording means recoverable prior to transmission of image data by another facsimile apparatus |
-
1979
- 1979-08-11 JP JP10264279A patent/JPS5927863B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5623289A (en) * | 1989-06-02 | 1997-04-22 | Canon Kabushiki Kaisha | Facsimile apparatus with ink ejection recording means recoverable prior to transmission of image data by another facsimile apparatus |
Also Published As
Publication number | Publication date |
---|---|
JPS5927863B2 (en) | 1984-07-09 |
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