Jemné Spektrum Elektromagnetické a Akustické Emise

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F06%3APU63552" target="_blank" >RIV/00216305:26220/06:PU63552 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Electromagnetic and Acoustic Emission Fine Spectra

Popis výsledku v původním jazyce

The new measuring method for detection of small cracks fine spectra of electromagnetic and acoustic emission (EME and AE) signals is described. It requires wide band ultra-low noise amplifiers, analogy filters, optimization of signal to noise ratio of sensors and application of noise elimination methods. The analyses of noise sources in sensors and preamplifiers are given. They are thermal noise, polarization noise and low frequency 1/f noise. Measuring set-up background noise suppression including electromagnetic shielding allows us to detect signals in the range of 100 nV. This measuring set-up was used to observe crack creation in granite samples. AE and EME signals show different behaviour in the first interval of about 10 &#61549;s just after crack creation. In frequency domain EME spectra show that in the first stage of crack creation the spectrum is given by crack walls eigen vibration, internal friction and sample electrical conductivity. We observed that crack opening and crac

Název v anglickém jazyce

Electromagnetic and Acoustic Emission Fine Spectra

Popis výsledku anglicky

The new measuring method for detection of small cracks fine spectra of electromagnetic and acoustic emission (EME and AE) signals is described. It requires wide band ultra-low noise amplifiers, analogy filters, optimization of signal to noise ratio of sensors and application of noise elimination methods. The analyses of noise sources in sensors and preamplifiers are given. They are thermal noise, polarization noise and low frequency 1/f noise. Measuring set-up background noise suppression including electromagnetic shielding allows us to detect signals in the range of 100 nV. This measuring set-up was used to observe crack creation in granite samples. AE and EME signals show different behaviour in the first interval of about 10 &#61549;s just after crack creation. In frequency domain EME spectra show that in the first stage of crack creation the spectrum is given by crack walls eigen vibration, internal friction and sample electrical conductivity. We observed that crack opening and crac

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

<a href="/cs/project/GA102%2F06%2F0866" target="_blank" >GA102/06/0866: Nelineární elektroultrazvuková spektroskopie pevných látek</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2006

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Advanced Materials Research

ISSN

1022-6680

e-ISSN

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Svazek periodika

2

Číslo periodika v rámci svazku

13-14

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

6

Strana od-do

169-174

Kód UT WoS článku

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EID výsledku v databázi Scopus

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