Results 21 to 30 of about 242,502 (308)
Non-contact ultrasonic detection of angled surface defects [PDF]
, 2011 Non-destructive testing is an important technique, and improvements are constantly needed. Surface defects in metals are not necessarily confined to orientations normal to the sample surface; however, much of the previous work investigating the ...
Clough, A. R. +3 more
core +1 more source
An Ultrasonic Target Detection System Based on Piezoelectric Micromachined Ultrasonic Transducers
Micromachines, 2023 In this paper, an ultrasonic target detection system based on Piezoelectric Micromachined Ultrasonic Transducers (PMUTs) is proposed, which consists of the PMUTs based ultrasonic sensor and the sensor system. Two pieces of 3 × 3 PMUTs arrays with the resonant frequency of 115 kHz are used as transmitter and receiver of the PMUTs-based ultrasonic sensor.
Mingze Gao +3 more
openaire +3 more sources
Interaction of laser generated ultrasonic waves with wedge-shaped samples [PDF]
, 2012 Wedge-shaped samples can be used as a model of acoustic interactions with samples ranging from ocean wedges, to angled defects such as rolling contact fatigue, to thickness measurements of samples with non-parallel faces.
A. R. Clough +7 more
core +1 more source
Numerically Trained Ultrasound AI for Monitoring Tool Degradation
Advanced Intelligent Systems, 2022 Monitoring tool degradation during manufacturing can ensure product accuracy and reliability. However, due to variations in degradation conditions and complexity in signal analysis, effective and broadly applicable monitoring is still challenging to ...
Yuqi Jin +6 more
doaj +1 more source
Advanced Composites Letters, 2020 Ultrasonic bonding is a convenient bonding technology, which features sufficient cleanliness, high efficiency, no need for additional bonding aids, and other outstanding advantages. In recent years, it has been introduced into the field of the micro–nano
Yibo Sun +5 more
doaj +1 more source
Ultrasonic Detection of Cavitation at Catheter Tips [PDF]
The Journal of the Acoustical Society of America, 1969 To assist in the identification of inner heart structures during ultrasonic cardiac diagnosis, various liquids have been injected through catheters into heart chambers. Each injection produces a cloud of ultrasonic echoes within the blood-filled catheterized chamber.
F W, Kremkau +4 more
openaire +2 more sources
Sparse Blind Deconvolution with Nonconvex Optimization for Ultrasonic NDT Application
Sensors, 2020 In the field of ultrasonic nondestructive testing (NDT), robust and accurate detection of defects is a challenging task because of the attenuation and noising of the ultrasonic wave from the structure.
Xuyang Gao +4 more
doaj +1 more source
An Ultrasonic-Based Detection of Air-Leakage for the Unclosed Components of Aircraft
Aerospace, 2021 Air-leakage detection is among the most important processes at the assembly stage of unclosed components, especially for large aircraft. A series of air-leakage detecting methods are generally applied during the final assembly, nevertheless, many of them
Yanlin Lyu +6 more
doaj +1 more source
Ultrasonic detection of parathyroid adenomas
The British Journal of Radiology, 1991 Abstract High-resolution real time sonography was used to evaluate patients with suspected primary hyperparathyroidism. A total of 12 consecutive patients was scanned pre-operatively. The sensitivity of the procedure was 92% and the specificity 97%. In our hospital sonography is the procedure of choice for localizing enlarged parathyroid
J, Murchison +4 more
openaire +2 more sources
A review of miniaturised Non-Destructive Testing technologies for in-situ inspections [PDF]
, 2018 Non-destructive testing (NDT) techniques have become attractive trends of product manufacturing, installation and post-maintenance in the aerospace, automotive and manufacturing industry, because of its benefits such as cost saving, easy to use and high ...
Addepalli +12 more
core +1 more source