Elektro-ultrazvuková spektroskopie vodivých látek

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F06%3APU63877" target="_blank" >RIV/00216305:26220/06:PU63877 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216305:26220/06:PU64452

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

ELECTRO-ULTRASONIC SPECTROSCOPY OF CONDUCTING SOLIDS

Popis výsledku v původním jazyce

The paper presents new principle of non-destructive testing of conducting solids. This method is based on ultrasonic phonons interaction with electrons in the nonlinear region caused by defect ("defect cased nonlinearity"). Tested sample is excited by harmonic AC electrical signal with frequency fE and ultrasonic wave with frequency fU. New harmonic signal with frequency fi is created on the defect caused nonlinearity. The frequency fi is given by the superposition or subtraction of exciting frequenciesfE and fU. The advantage of this method consists in detection of electrical signal with frequency different from frequencies of excitation signals. Two ways for realisation of this principle are compared and ways to increasing of sensitivity are shown.The theoretical sensitivity of this method and its limitation by parasitic effect is also discussed. The usability and possibility of minimisation of parasitic effects are confirmed experimentally.

Název v anglickém jazyce

ELECTRO-ULTRASONIC SPECTROSCOPY OF CONDUCTING SOLIDS

Popis výsledku anglicky

The paper presents new principle of non-destructive testing of conducting solids. This method is based on ultrasonic phonons interaction with electrons in the nonlinear region caused by defect ("defect cased nonlinearity"). Tested sample is excited by harmonic AC electrical signal with frequency fE and ultrasonic wave with frequency fU. New harmonic signal with frequency fi is created on the defect caused nonlinearity. The frequency fi is given by the superposition or subtraction of exciting frequenciesfE and fU. The advantage of this method consists in detection of electrical signal with frequency different from frequencies of excitation signals. Two ways for realisation of this principle are compared and ways to increasing of sensitivity are shown.The theoretical sensitivity of this method and its limitation by parasitic effect is also discussed. The usability and possibility of minimisation of parasitic effects are confirmed experimentally.

Druh

D - Stať ve sborníku

CEP obor

JA - Elektronika a optoelektronika, elektrotechnika

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 statě ve sborníku

9th European Conference of NDT

ISBN

3-931381

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

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Název nakladatele

DGZIP

Místo vydání

Berlín, Německo

Místo konání akce

Berlin

Datum konání akce

25. 9. 2006

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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