CA1039367A - Detecteur de valeurs crete-a-crete - Google Patents

Detecteur de valeurs crete-a-crete

Info

Publication number
CA1039367A
CA1039367A CA277,527A CA277527A CA1039367A CA 1039367 A CA1039367 A CA 1039367A CA 277527 A CA277527 A CA 277527A CA 1039367 A CA1039367 A CA 1039367A
Authority
CA
Canada
Prior art keywords
peaks
peak
inverting
clamping circuit
predetermined
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.)
Expired
Application number
CA277,527A
Other languages
English (en)
Inventor
Sotirios J. Vahaviolos
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.)
AT&T Inc
Original Assignee
Western Electric Co Inc
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
Priority claimed from US389414A external-priority patent/US3924456A/en
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Priority to CA305,298A priority Critical patent/CA1046594A/fr
Application granted granted Critical
Publication of CA1039367A publication Critical patent/CA1039367A/fr
Expired legal-status Critical Current

Links

Landscapes

  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
CA277,527A 1973-08-17 1977-05-03 Detecteur de valeurs crete-a-crete Expired CA1039367A (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA305,298A CA1046594A (fr) 1973-08-17 1978-06-13 Detecteur de valeur crete-a-crete

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US389414A US3924456A (en) 1973-08-17 1973-08-17 Methods and apparatus for detecting the presence of cracks in a workpiece by the use of stress waves emitted therefrom
CA200,803A CA1014648A (en) 1973-08-17 1974-05-24 Methods and apparatus for detecting the presence of cracks in a workpiece by the use of stress waves emitted therefrom

Publications (1)

Publication Number Publication Date
CA1039367A true CA1039367A (fr) 1978-09-26

Family

ID=25667587

Family Applications (1)

Application Number Title Priority Date Filing Date
CA277,527A Expired CA1039367A (fr) 1973-08-17 1977-05-03 Detecteur de valeurs crete-a-crete

Country Status (1)

Country Link
CA (1) CA1039367A (fr)

Similar Documents

Publication Publication Date Title
US3924456A (en) Methods and apparatus for detecting the presence of cracks in a workpiece by the use of stress waves emitted therefrom
US6360608B1 (en) Transducer for measuring acoustic emission events
Breckenridge et al. Acoustic emission: some applications of Lamb’s problem
US6173613B1 (en) Measuring crack growth by acoustic emission
Morton et al. Acoustic emissions of fatigue crack growth
Buttle et al. Characterization of particle impact by quantitative acoustic emission
US6330827B1 (en) Resonant nonlinear ultrasound spectroscopy
US3979670A (en) Apparatus for detecting and measuring peak-to-peak values in electrical signals
US4207771A (en) Method and apparatus for monitoring cracking using stress wave emission techniques
CA1047156A (fr) Appareil et methode d'evaluation non destructive en temps reel des raccords par adherence a l'aide d'ondes de tension mecaniques
SE518997C2 (sv) Förfarande och anordning för att detektera skada i material eller föremål
US5408880A (en) Ultrasonic differential measurement
US5419176A (en) Particle detection and analysis
US3919883A (en) Method and apparatus for detecting progressive cracks in materials
US4090400A (en) Methods and apparatus for the non-destructive testing of bonded articles
Green Jr Basic wave analysis of acoustic emission
US4111053A (en) Audible bond tester
CA1046594A (fr) Detecteur de valeur crete-a-crete
US6111335A (en) Piezoelectric interface analyzer
EP0470639B1 (fr) Capteur d'émission acoustique
Kishi et al. Dynamic crack growth during pop-in fracture in 7075 aluminum alloy
US6584848B1 (en) Non-destructive evaluation method employing dielectric electrostatic ultrasonic transducers
Grabec et al. A comparison of high-performance acoustic emission transducers
US4232558A (en) Methods for determining bond failure modes using stress wave emission techniques
AU2004202266B2 (en) Method for determining physical properties of wood