Number of the records: 1

In situ calibration of acoustic emission transducers by time reversal method

SYSNO ASEP	0456674
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	In situ calibration of acoustic emission transducers by time reversal method
Author(s)	Kober, Jan (UT-L)_{RID, ORCID} Převorovský, Zdeněk (UT-L)_RID Chlada, Milan (UT-L)_{RID, ORCID}
Number of authors	3
Source Title	Sensors and Actuators A - Physical. - : Elsevier - ISSN 0924-4247 Roč. 240, April (2016), s. 50-56
Number of pages	7 s.
Publication form	Print - P
Language	eng - English
Country	NL - Netherlands
Keywords	time reversed acoustics ; calibration ; in situ ; acoustic emission
Subject RIV	BI - Acoustics
Institutional support	UT-L - RVO:61388998
UT WOS	000372693600007
EID SCOPUS	84957585773
DOI	10.1016/j.sna.2016.01.033
Annotation	Conventional methods of calibration of acoustic emission transducers require an already calibratedreference transducer and/or special test specimen. Moreover the calibration results are not directlytransferrable to practice, since they are dependent on bonding conditions and mechanical propertiesof the medium. In this paper a reference-free in situ calibration method is proposed. It is based on acombination of time reversed acoustics and reciprocal calibration and allows accurate determination oftransducers’ frequency responses. The method was developed and successfully experimentally verifiedassuming that frequency response of used transducers is the same for transmission and reception. Sub-sequently the analysis was extended considering irreversible transducers and applied to experimentaldata. Of five tested transducers, three were found reversible and two demonstrated resonance frequencyshift in lower frequency region between reception and transmission.
Workplace	Institute of Thermomechanics
Contact	Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823
Year of Publishing	2017
Electronic address	http://ac.els-cdn.com/S0924424716300334/1-s2.0-S0924424716300334-main.pdf?_tid=0acf4736-ef6d-11e5-b826-00000aacb362&acdnat=1458568911_1c21eda9762b905a684ff939463ef3fe

Number of the records: 1