JPS5470881A - Flaw generation monitor of member - Google Patents

Flaw generation monitor of member

Info

Publication number
JPS5470881A
JPS5470881A JP13262977A JP13262977A JPS5470881A JP S5470881 A JPS5470881 A JP S5470881A JP 13262977 A JP13262977 A JP 13262977A JP 13262977 A JP13262977 A JP 13262977A JP S5470881 A JPS5470881 A JP S5470881A
Authority
JP
Japan
Prior art keywords
signals
output
attenuator
comparator
hold device
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
Application number
JP13262977A
Other languages
Japanese (ja)
Other versions
JPS5822700B2 (en
Inventor
Jun Oka
Takashi Suzuki
Narikazu Imanaka
Yoshihiro Fujii
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel 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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP52132629A priority Critical patent/JPS5822700B2/en
Publication of JPS5470881A publication Critical patent/JPS5470881A/en
Publication of JPS5822700B2 publication Critical patent/JPS5822700B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

PURPOSE: To accurately monitor generation of flaw in a member to be monitored by comparing the signals of a piezoelectric sensor having flat charactristics through low and high range circuits with the use of a comparator so that the resultant output signals may be recognized as AE count signals.
CONSTITUTION: The signals, which are detected by a piezoelectric type sensor 3 having flat frequency characterstics, are amplified by an amplifier 4 and divided into halves so that they are shunted into H.P.F 5 of 200 KHz and H.P.F. 8 of 600 KHz. Then, the respective signals are held at their amplitude peak levels by means of peak hold devices 6 and 9. Then, the signals having passed through the hold device 6 are attenuated to the level preset by an attenuator 7. The output of the hold device 9 and the output of the attenuator 7 are compared by a comparator 10 so that an output may be generated from the attenuator 10 only in case the output from the hold device 9 is higher. The output from the comparator 10 is the AE count signals indicative of the flaw generation.
COPYRIGHT: (C)1979,JPO&Japio
JP52132629A 1977-11-05 1977-11-05 Part flaw monitoring device Expired JPS5822700B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52132629A JPS5822700B2 (en) 1977-11-05 1977-11-05 Part flaw monitoring device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52132629A JPS5822700B2 (en) 1977-11-05 1977-11-05 Part flaw monitoring device

Publications (2)

Publication Number Publication Date
JPS5470881A true JPS5470881A (en) 1979-06-07
JPS5822700B2 JPS5822700B2 (en) 1983-05-10

Family

ID=15085784

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52132629A Expired JPS5822700B2 (en) 1977-11-05 1977-11-05 Part flaw monitoring device

Country Status (1)

Country Link
JP (1) JPS5822700B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60135861A (en) * 1983-12-26 1985-07-19 Toyota Motor Corp High frequency quenching crack inspecting method and apparatus
JPH07228969A (en) * 1994-02-18 1995-08-29 Agency Of Ind Science & Technol Composite material having pressure measuring function

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60135861A (en) * 1983-12-26 1985-07-19 Toyota Motor Corp High frequency quenching crack inspecting method and apparatus
JPH0510619B2 (en) * 1983-12-26 1993-02-10 Toyota Motor Co Ltd
JPH07228969A (en) * 1994-02-18 1995-08-29 Agency Of Ind Science & Technol Composite material having pressure measuring function

Also Published As

Publication number Publication date
JPS5822700B2 (en) 1983-05-10

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