JPS6474446A - Ae crack detecting device - Google Patents

Ae crack detecting device

Info

Publication number
JPS6474446A
JPS6474446A JP62232872A JP23287287A JPS6474446A JP S6474446 A JPS6474446 A JP S6474446A JP 62232872 A JP62232872 A JP 62232872A JP 23287287 A JP23287287 A JP 23287287A JP S6474446 A JPS6474446 A JP S6474446A
Authority
JP
Japan
Prior art keywords
signal
autocorrelation
detected
noise
result
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
Application number
JP62232872A
Other languages
Japanese (ja)
Inventor
Akira Sakano
Kazuo Fujimori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Original Assignee
Toyota Motor Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp filed Critical Toyota Motor Corp
Priority to JP62232872A priority Critical patent/JPS6474446A/en
Publication of JPS6474446A publication Critical patent/JPS6474446A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To accurately discriminate a signal and a noise by performing the autocorrelation of an AE signal detected by a sensor and judging whether the signal is a signal to be detected or noise from the area, pattern, or period of correlation obtained as a result. CONSTITUTION:Only a signal close to the AE signal due to a specific area, e.g. a crack among AE signals detected by the sensor 1 is stored as a digital signal in a memory 8. The stored digital signal is inputted to an autocorrelation arithmetic processing part 11 and product sum arithmetic operation between the time-series digital signal in the memory 8 and a signal which is delayed according to the signal is carried out for autocorrelation. The autocorrelation result is inputted to a signal processing part 12 to judge whether the signal is the signal to be detected or noise from the area, pattern, or period of the correlation as the arithmetic result.
JP62232872A 1987-09-17 1987-09-17 Ae crack detecting device Pending JPS6474446A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62232872A JPS6474446A (en) 1987-09-17 1987-09-17 Ae crack detecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62232872A JPS6474446A (en) 1987-09-17 1987-09-17 Ae crack detecting device

Publications (1)

Publication Number Publication Date
JPS6474446A true JPS6474446A (en) 1989-03-20

Family

ID=16946150

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62232872A Pending JPS6474446A (en) 1987-09-17 1987-09-17 Ae crack detecting device

Country Status (1)

Country Link
JP (1) JPS6474446A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5398605A (en) * 1993-08-18 1995-03-21 Tokyo Kirai Seisakusho, Ltd. Ink pump control system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5398605A (en) * 1993-08-18 1995-03-21 Tokyo Kirai Seisakusho, Ltd. Ink pump control system

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