JPS5560850A - Sound wave monitor - Google Patents

Sound wave monitor

Info

Publication number
JPS5560850A
JPS5560850A JP13397278A JP13397278A JPS5560850A JP S5560850 A JPS5560850 A JP S5560850A JP 13397278 A JP13397278 A JP 13397278A JP 13397278 A JP13397278 A JP 13397278A JP S5560850 A JPS5560850 A JP S5560850A
Authority
JP
Japan
Prior art keywords
length
energy
cracking
crack
circuit
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
JP13397278A
Other languages
Japanese (ja)
Inventor
Nobuo Uesugi
Tatsuo Miyazawa
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP13397278A priority Critical patent/JPS5560850A/en
Publication of JPS5560850A publication Critical patent/JPS5560850A/en
Pending legal-status Critical Current

Links

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00—Energy generation of nuclear origin
    • Y02E30/30—Nuclear fission reactors

Landscapes

  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)

Abstract

PURPOSE: To measure the length of crack and the propagation speed of the crack, by detecting a sound wave (AC (AE wave ) generated at the time of cracking of a structure or the like to determine the position of a sound source and the energy of the cracking and calculating the length of the cracking from the stress and the cracking energy.
CONSTITUTION: AE waves resulting from the release of elastic energy due to cracks caused at points X1, X2 of a structure such as a pressure container are detected by sensors S1, S2 to determine the position of the sound sources by an arrival time difference measuring circuit 18 and a sound source position calculating circuit 20. The integrated values of the detected AE waves corresponding to the numerous points X1, X2... are summed up by an energy summing-up circuit 28 depending on signals of the positions of the sound sources to indicate the energy of cracks on a monitor 30. The length of the cracks and the time-dependent change in the length are calculated by a crack length propagation speed calculating circuit 34 from the cracking energy and the average value of stress measured by a stress measuring circuit 32 and a sensor S3 such as a strain gauge. The crack length and the crack propagation speed are thus determined to raise an alarm if necessary.
COPYRIGHT: (C)1980,JPO&Japio
JP13397278A 1978-10-31 1978-10-31 Sound wave monitor Pending JPS5560850A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13397278A JPS5560850A (en) 1978-10-31 1978-10-31 Sound wave monitor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13397278A JPS5560850A (en) 1978-10-31 1978-10-31 Sound wave monitor

Publications (1)

Publication Number Publication Date
JPS5560850A true JPS5560850A (en) 1980-05-08

Family

ID=15117369

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13397278A Pending JPS5560850A (en) 1978-10-31 1978-10-31 Sound wave monitor

Country Status (1)

Country Link
JP (1) JPS5560850A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013525803A (en) * 2010-05-05 2013-06-20 フラウンホファー ゲセルシャフト ツール フェールデルンク ダー アンゲヴァンテン フォルシュンク エー．ファオ． Methods and devices for nondestructive material testing by ultrasound
US20160282311A1 (en) * 2015-03-24 2016-09-29 Kabushiki Kaisha Toshiba Detection system and detection method
CN115791460A (en) * 2022-11-18 2023-03-14 中国矿业大学 Sensor for propagation speed of blasting crack in rock material and testing method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013525803A (en) * 2010-05-05 2013-06-20 フラウンホファー ゲセルシャフト ツール フェールデルンク ダー アンゲヴァンテン フォルシュンク エー．ファオ． Methods and devices for nondestructive material testing by ultrasound
US20160282311A1 (en) * 2015-03-24 2016-09-29 Kabushiki Kaisha Toshiba Detection system and detection method
US10018597B2 (en) * 2015-03-24 2018-07-10 Kabushiki Kaisha Toshiba Detection system and detection method
CN115791460A (en) * 2022-11-18 2023-03-14 中国矿业大学 Sensor for propagation speed of blasting crack in rock material and testing method thereof
CN115791460B (en) * 2022-11-18 2023-08-22 中国矿业大学 Crack Propagation Velocity Sensor and Its Test Method for Internal Burst of Rock Materials

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