Results 181 to 190 of about 3,001,234 (205)

Nonlinear modulation technique for NDE with air-coupled ultrasound

Ultrasonics, 2004
The present study is aimed at expanding flexibility and application area of nonlinear acoustic modulation (NAM-) technique by combining the benefits of noncontact ultrasound excitation (remote locating and imaging of defects) with sensitivity of nonlinear methods in a new air-coupled NAM-version.
E M, Ballad, S Yu, Vezirov, K, Pfleiderer, I Yu, Solodov, G, Busse   +4 more
openaire   +2 more sources

Noise analysis in air-coupled PVDF ultrasonic sensors

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2000
In this paper we analyze the noise generated in a piezo-polymer based sensor for low frequency ultrasound in air. The sensor includes two curved PVDF transducers for medium and short range applications. A lumped RLC equivalent circuit was derived from the measurement of the transducer's electrical admittance, in air, by taking into account both ...
openaire   +2 more sources

Air-Coupled Vibrometry

2011
D. Döring, I. Solodov, G. Busse
openaire   +1 more source

Air-Coupled Ultrasonic Testing of Rails

2016
Under sponsorship by the Federal Railroad Administration (FRA), the University of California at San Diego is developing a system for non-contact rail integrity evaluation. The system uses ultrasonic air-coupled guided wave signal generation and air-coupled signal detection to detect transverse and longitudinal defects in the rail. The fully air-coupled
Stefano Mariani, Francesco Lanza di Scalea, Thompson Nguyen, Simone Sternini, Mahmood Fateh, Robert Wilson   +5 more
openaire   +1 more source

Air-coupled ultrasonic diffuse-wave techniques to evaluate distributed cracking damage in concrete

Ultrasonics, 2022
Eunjong Ahn, Myoungsu Shin, John S Popovics   +2 more
exaly  

Non-invasive monitoring of potato drying by means of air-coupled ultrasound

Food Control, 2023
Virginia Sánchez-Jiménez, Gentil A Collazos-Escobar, Alberto Gonzalez-Mohino   +2 more
exaly  

A techno-economic comparison of ground-coupled and air-coupled heat pump system for space cooling

Building and Environment, 2007
Hikmet Esen, Mehmet Esen
exaly  

The use of broadband acoustic transducers and pulse-compression techniques for air-coupled ultrasonic imaging

Ultrasonics, 2001
T H Gan, D A Hutchins, D R Billson
exaly  

Coded waveforms for optimised air-coupled ultrasonic nondestructive evaluation

Ultrasonics, 2014
D A Hutchins, P Burrascano, L A J Davis   +2 more
exaly  

Air-Coupled Reception of a Slow Ultrasonic A0 Mode Wave Propagating in Thin Plastic Film

Sensors, 2020
Rymantas Kazys
exaly