Results 261 to 270 of about 4,623,161 (291)
Some of the next articles are maybe not open access.
A comparison of coded waveforms for air-coupled ultrasonic inspection
2013 18th International Conference on Digital Signal Processing (DSP), 2013This paper investigates various types of coded waveforms that could be used for air-coupled ultrasound. These are needed because of the low signal-to-noise ratios that are found in many air-coupled ultrasonic NDT measurements. The various algorithms are described, and their performance in the presence of noise demonstrated.
Marco Ricci 0001 +3 more
openaire +1 more source
Air-coupled lamb wave tomography
An entirely air-coupled inspection system using a pair of micromachined silicon capacitance transducers has been used to image defects in thin plates of different materials (0.7 mm to 2.22 mm thick) using air-coupled Lamb wave tomography. A Altered back projection algorithm was used in a form of difference tomography to reconstruct images of defects upopenaire +1 more source
Air-Coupled Ultrasonic Testing of Rails
2016Under 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 +5 more
openaire +1 more source
Non-Invasive Monitoring of Potato Drying by Means of Air-Coupled Ultrasound
Food Control, 2023Alberto González-Mohino Jiménez +2 more
exaly
The Economic Impact of Clean Indoor Air Laws
Ca-A Cancer Journal for Clinicians, 2007Frank Chaloupka
exaly