JPS559140A - Acoustic emission discriminator - Google Patents

Acoustic emission discriminator

Info

Publication number
JPS559140A
JPS559140A JP8204478A JP8204478A JPS559140A JP S559140 A JPS559140 A JP S559140A JP 8204478 A JP8204478 A JP 8204478A JP 8204478 A JP8204478 A JP 8204478A JP S559140 A JPS559140 A JP S559140A
Authority
JP
Japan
Prior art keywords
voltage
signal
detected
circuit
discriminator
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
JP8204478A
Other languages
Japanese (ja)
Other versions
JPS5822701B2 (en
Inventor
Ichiya Satou
Jun Kubota
Takao Yoneyama
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP53082044A priority Critical patent/JPS5822701B2/en
Publication of JPS559140A publication Critical patent/JPS559140A/en
Publication of JPS5822701B2 publication Critical patent/JPS5822701B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

PURPOSE: To improve noise removing efficiency, by obtaining the ratio of a detected signal of filtered acoustic emission (AE) to a detected signal of unfiltered acoustic emission (AE) and multiplying the detected filtered signal by it.
CONSTITUTION: One of the AE signals detected by sensor 6 is discriminated by discriminator circuit 12a via BPF 8a corresponding to the AE signal and becomes voltage Ea. The other, which is not filtered, is discriminated by discriminator 12b, becomes voltage Eb, and is fed to multiplicatin-division circuit 13. This circuit 13 determines the ratio of voltage Ea to voltage Eb by division and further multiplies Ea by this ratio. Consequently, if the noise attenuation rate due to BFP 6 is denoted by Kn, where 0<Kn<1, then, noise voltage eno output by circuit 13 becomes the value given by Equation 1. Thus, noise removing efficiency is improved. Here, en represents the noise in the detected AE signal.
COPYRIGHT: (C)1980,JPO&Japio
JP53082044A 1978-07-07 1978-07-07 Accorstates query discrimination device Expired JPS5822701B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP53082044A JPS5822701B2 (en) 1978-07-07 1978-07-07 Accorstates query discrimination device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53082044A JPS5822701B2 (en) 1978-07-07 1978-07-07 Accorstates query discrimination device

Publications (2)

Publication Number Publication Date
JPS559140A true JPS559140A (en) 1980-01-23
JPS5822701B2 JPS5822701B2 (en) 1983-05-10

Family

ID=13763507

Family Applications (1)

Application Number Title Priority Date Filing Date
JP53082044A Expired JPS5822701B2 (en) 1978-07-07 1978-07-07 Accorstates query discrimination device

Country Status (1)

Country Link
JP (1) JPS5822701B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58500960A (en) * 1981-06-16 1983-06-09 メタル　ボツクス　パブリツク　リミテツド　コンパニ− Fragmentation identification method and identification device for brittle articles
JP2003066015A (en) * 2001-08-21 2003-03-05 Ishikawajima Harima Heavy Ind Co Ltd Signal processing method in acoustic emission method
WO2009002394A1 (en) * 2007-06-21 2008-12-31 Avistar, Inc. Method and apparatus for controlling relative coal flow in pipes from a pulverizer

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6957399B2 (en) * 2018-03-26 2021-11-02 株式会社Ｉｈｉ検査計測 Strength inspection method and strength evaluation equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58500960A (en) * 1981-06-16 1983-06-09 メタル　ボツクス　パブリツク　リミテツド　コンパニ− Fragmentation identification method and identification device for brittle articles
JP2003066015A (en) * 2001-08-21 2003-03-05 Ishikawajima Harima Heavy Ind Co Ltd Signal processing method in acoustic emission method
WO2009002394A1 (en) * 2007-06-21 2008-12-31 Avistar, Inc. Method and apparatus for controlling relative coal flow in pipes from a pulverizer

Also Published As

Publication number Publication date
JPS5822701B2 (en) 1983-05-10

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