Characterization of Reflector Types by Phase-Sensitive Ultrasonic Data Processing and Imaging

Autor:	Martin Krause, Frank Mielentz, Klaus Mayer, Boris Milmann, Karl-Jörg Langenberg
Rok vydání:	2008
Předmět:	Materials science business.industry Mechanical Engineering Acoustics Phase (waves) Physical optics Characterization (materials science) Optics Transducer Mechanics of Materials Nondestructive testing Radar imaging Reflection (physics) Ultrasonic sensor business
Zdroj:	Journal of Nondestructive Evaluation. 27:35-45
ISSN:	1573-4862 0195-9298
DOI:	10.1007/s10921-008-0035-3
Popis:	Ultrasonic and radar imaging techniques are limited in resolution by the wavelength in the material, yet information beyond those limits is hidden in complex frequency dependent reflection coefficients. The analysis of the phase of complex reflection coefficients together with the properties of imaging algorithms can help to characterize and to classify indications of defects in concrete buildings. This paper describes a method to extract phase information from measurements and SAFT reconstructed images. The influencing factors like material properties, transducer characteristics, and imaging algorithms based on Born or Physical Optics approximations are elaborated. Simulated and experimental results are briefly discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::13950eaa711a40c53f3cdd79046bb0ab https://doi.org/10.1007/s10921-008-0035-3 Zobrazit plný text záznamu Full text from SpringerLink