Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
On the measurement of frequency-dependent ultrasonic attenuation in strongly heterogeneous materials
This paper deals with the measurement of frequency-dependent ultrasonic attenuation in strongly heterogeneous materials, such as cementitious materials. To improve the measurement of this parameter on this kind of materials, a linear swept-frequency signal is used to drive an emitter transducer to conduct a through-transmission inspection in immersion. To filter out undesirable frequency content, time-frequency filtering and detection process are performed. The use of this method has been compared with two excitation techniques, the broadband and the narrowband pulses. The results obtained using the swept-frequency excitation together with the time-frequency filtering, allows the determination of the attenuation curves with high accuracy over a wide frequency range without the need for complicated equipment, and improves the effective bandwidth by using a unique pair of transducers.
On the measurement of frequency-dependent ultrasonic attenuation in strongly heterogeneous materials
This paper deals with the measurement of frequency-dependent ultrasonic attenuation in strongly heterogeneous materials, such as cementitious materials. To improve the measurement of this parameter on this kind of materials, a linear swept-frequency signal is used to drive an emitter transducer to conduct a through-transmission inspection in immersion. To filter out undesirable frequency content, time-frequency filtering and detection process are performed. The use of this method has been compared with two excitation techniques, the broadband and the narrowband pulses. The results obtained using the swept-frequency excitation together with the time-frequency filtering, allows the determination of the attenuation curves with high accuracy over a wide frequency range without the need for complicated equipment, and improves the effective bandwidth by using a unique pair of transducers.
On the measurement of frequency-dependent ultrasonic attenuation in strongly heterogeneous materials
Über Messung der frequenzabhängigen Ultraschallschwächung in stark heterogenen Werkstoffen
Molero, M. (Autor:in) / Segura, I. (Autor:in) / Aparicio, S. (Autor:in) / Hernandez, M.G. (Autor:in) / Izquierdo, M.A.G. (Autor:in)
Ultrasonics ; 50 ; 824-828
2010
5 Seiten, 4 Bilder, 24 Quellen
Aufsatz (Zeitschrift)
Englisch
An investigation of frequency-dependent ultrasonic attenuation in concrete
| Tema Archiv | 1995
An Investigation of Frequency-Dependent Ultrasonic Attenuation in Concrete
| British Library Conference Proceedings | 1995