Improved Signal to Noise Ratio of Electro-ultrasonic Spectroscopy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F08%3APU78576" target="_blank" >RIV/00216305:26220/08:PU78576 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Improved Signal to Noise Ratio of Electro-ultrasonic Spectroscopy

Original language description

The paper presents signal to noise consideration of a new NDT method. Tested sample is excited by electrical and ultrasonic signals with different frequencies. On the defect new harmonic signal is created with frequency given by subtraction of exciting frequencies fE and fU. High sensitivity of this method follows from the fact that the signal giving information on tested sample quality has frequency different from exciting signals. The signal to noise ratio and high sensitivity for NDT analyses is based on the application of special electrical filters. The theoretical sensitivity of this method and its limitation by parasitic effects is analyzed. Therefore the new variants of circuitry are designed and used for experimental verifying. First of all theequivalent dynamic range and final sensitivity is improved using linear filters to reduce the level of exciting signals in the amplifier input and by noise in exciting electrical signal reducing. The usability of this principle and possi

Czech name

Vylepšení poměru signal šum u elektro-ultrazvukové spektroskopie

Czech description

The paper presents signal to noise consideration of a new NDT method. Tested sample is excited by electrical and ultrasonic signals with different frequencies. On the defect new harmonic signal is created with frequency given by subtraction of exciting frequencies fE and fU. High sensitivity of this method follows from the fact that the signal giving information on tested sample quality has frequency different from exciting signals. The signal to noise ratio and high sensitivity for NDT analyses is based on the application of special electrical filters. The theoretical sensitivity of this method and its limitation by parasitic effects is analyzed. Therefore the new variants of circuitry are designed and used for experimental verifying. First of all theequivalent dynamic range and final sensitivity is improved using linear filters to reduce the level of exciting signals in the amplifier input and by noise in exciting electrical signal reducing. The usability of this principle and possi

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

JA - Electronics and optoelectronics

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2008

Confidentiality

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

Name of the periodical

ElectroScope - http://www.electroscope.zcu.cz

ISSN

1802-4564

e-ISSN

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Volume of the periodical

2008

Issue of the periodical within the volume

6

Country of publishing house

CZ - CZECH REPUBLIC

Number of pages

4

Pages from-to

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UT code for WoS article

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EID of the result in the Scopus database

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