JPS5660344A - Ae wave detector - Google Patents
Ae wave detectorInfo
- Publication number
- JPS5660344A JPS5660344A JP13624879A JP13624879A JPS5660344A JP S5660344 A JPS5660344 A JP S5660344A JP 13624879 A JP13624879 A JP 13624879A JP 13624879 A JP13624879 A JP 13624879A JP S5660344 A JPS5660344 A JP S5660344A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- signals
- pulse
- pulse width
- damping
- 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
Abstract
PURPOSE: To discriminate the AE wave signal and the noise signal from each other in a short time, by converting envelope components extrcted from the receiving signal into a binary with a fixed slice level to obtain the signal of a pulse width corresponding to the damping coefficient and by comparing the pulse width.
CONSTITUTION: AE wave signal S and mechanical noise signal N are included in the receiving signal of AE sensor 11 and are converted to binaries in discriminator 15 by prescribed slice level C after respective envelope components are extracted by envelope extracting circuit 13. As the result, the pulse signal corresponding to the duration width of the receiving signal of sensor 11 and the peak value of signal S or N are detected by discriminator 15 and auxiliary pulse generating circuit 16 respectively, and damping signals P1 and Q1 of damping coefficients P and Q with these detection values as initial values are obtained, and further, pulse signals P2 and Q2 obtained by slicing signals P1 and Q1 by level C are obtained. Consequently, the AE wave signal and the noise signal can be discriminated from each other in a short time by comparing the receiving signal and said signals P2 and Q2 in pulse width.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13624879A JPS5660344A (en) | 1979-10-22 | 1979-10-22 | Ae wave detector |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13624879A JPS5660344A (en) | 1979-10-22 | 1979-10-22 | Ae wave detector |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5660344A true JPS5660344A (en) | 1981-05-25 |
Family
ID=15170742
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13624879A Pending JPS5660344A (en) | 1979-10-22 | 1979-10-22 | Ae wave detector |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5660344A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0253552A (en) * | 1988-08-19 | 1990-02-22 | Nagano Pref Gov | Extraction device for feature of supersonic signal |
-
1979
- 1979-10-22 JP JP13624879A patent/JPS5660344A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0253552A (en) * | 1988-08-19 | 1990-02-22 | Nagano Pref Gov | Extraction device for feature of supersonic signal |
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