JPS5569041A - Processing system for digital flaw detection signal - Google Patents
Processing system for digital flaw detection signalInfo
- Publication number
- JPS5569041A JPS5569041A JP14302078A JP14302078A JPS5569041A JP S5569041 A JPS5569041 A JP S5569041A JP 14302078 A JP14302078 A JP 14302078A JP 14302078 A JP14302078 A JP 14302078A JP S5569041 A JPS5569041 A JP S5569041A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- mean
- scan output
- value
- output 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.)
- Granted
Links
Landscapes
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
PURPOSE: To make it possible to extract accurately the rise and its neighborhood of a scan output signal and other flaw signals by extracting a background signal component with fidelity from the scan output signal through digital processing.
CONSTITUTION: This system is equipped with unit 11 where digital signals converted from analog scan output signals are stored, circuit 12 which calculates the mean value several outputs in a fixed broad mean interval from memory contents, circuit 16 which obtains the mean value of several outputs in a fixed narrow mean interval, and circuit 13 which outputs a background signal component by selecting either output of circuit 12 or 16. In circuit 12, full-adders at several stages and a shift register at an intermediate stage obtain the mean value in the broad mean interval by using a mean value and instantaneous value right before a fixed value of the scan output signal to select the output of circuit 16 at the rise or its neighborhood of the scan output signal or that of circuit 12 at the flat part. Then, a difference from an instantaneous value equivalent to that at the center of the broad mean interval of unit 11 is found to detect the background signal component.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14302078A JPS5569041A (en) | 1978-11-20 | 1978-11-20 | Processing system for digital flaw detection signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14302078A JPS5569041A (en) | 1978-11-20 | 1978-11-20 | Processing system for digital flaw detection signal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5569041A true JPS5569041A (en) | 1980-05-24 |
| JPS6144255B2 JPS6144255B2 (en) | 1986-10-02 |
Family
ID=15329051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14302078A Granted JPS5569041A (en) | 1978-11-20 | 1978-11-20 | Processing system for digital flaw detection signal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5569041A (en) |
-
1978
- 1978-11-20 JP JP14302078A patent/JPS5569041A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6144255B2 (en) | 1986-10-02 |
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