Chirp excitation of ultrasonic guided waves
Web开馆时间：周一至周日7:00-22:30 周五 7:00-12:00; 我的图书馆 WebChirp generated acoustic wavefield images. Wavefield images that are recorded from a chirp excitation are considered, which offers the advantage of high quality broadband …
Chirp excitation of ultrasonic guided waves
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WebSep 25, 2024 · A linear chirp signal from 20 to 200 kHz with 1 ms duration is used as excitation, and the response is acquired for 2 ms with an appropriate delay corresponding to the fastest signal component arrival. The proposed EOC compensation method is not applied for the initial test. WebJan 5, 2024 · In this study, we implement the rainbow trapping of ultrasonic guided waves using a chirped phononic crystal plate that spatially modulates the stopband and group …
WebPipeline systems are prone to defects due to the harsh service conditions, which may induce catastrophic failure if found not in time. Ultrasonic guided wave (UGW) testing provides a convenient option for pipeline detection, showing high-efficiency, non-contact, long-distance and large-scale capabilities. To address the problem that UGW signals suffer from poor … WebMay 21, 2012 · Classically, damage detection or dispersion curve determination using piezoceramic-generated guided waves has been based on analysis of propagation …
WebA Physics-Based Signal Processing Approach for Noninvasive Ultrasonic Characterization of Multiphase Oil-Water-Gas Flows in a Pipe IEEE Trans Ultrason Ferroelectr Freq Control. 2024 Apr;68 (4):1328-1346. doi: 10.1109/TUFFC.2024.3026071. Epub 2024 Mar 26. Authors Vamshi Krishna Chillara , Blake Sturtevant , Cristian Pantea …
WebJul 1, 2024 · The use of guided waves has been previously reviewed for the monitoring and detection of various damages in pipes [8], [9], [10]. GWT has several advantages over the conventional ultrasonic techniques: First, guided waves can travel long distances in the walls of a pipe under test, and thus can improve inspection efficiency [11], [12].
WebAug 23, 2024 · Guided wave excitation signal: ( a) time; ( b) frequency domains, received signal; ( c) time; ( d) frequency domains. The main challenge is to identify small features that might be covered by the current noise level, which makes signal interpretation difficult. immaculate football 2022WebJul 3, 2012 · Here chirp excitations are utilized to address the need to both test at multiple frequencies and achieve a high signal-to-noise ratio to minimize acquisition time. A … list of schools teaching 1619WebThe effects of chirp bandwidth and duration on the proposed coded signal excitation are then analyzed based on the simulation mode. The simulation results show that chirp bandwidth has less impact on proposed coded signal excitation than chirp excitation. The proposed coded signal is more suited to an ultrasonic exciting signal. immaculate football 2020WebSep 25, 2024 · The proposed UT method uses multi-mode and broadband guided ultrasonic waves in the pipe walls, excited and received by single-element ultrasonic … list of schools offering music therapyWebA whole group of nondestructive measurements includes methods using guided wave. A method was shown in where a compressed chirp signal for guided wave allowed the excitation of long-range waves. These, in turn, allowed for the identification of the level of anchorage even when the wave energy leaked from the anchor into the surrounding rock ... immaculate football breakWebJan 22, 2024 · A framework based on a comparative analysis of signals was developed. For the first specific aim, the effectiveness of features based on statistical condition indicators of the sensor signals were evaluated. For the second specific aim, actuator-sensor signal pair were analyzed using cross-correlation to extract two features. immaculate football checklistWebJan 9, 2024 · Ultrasonic guided wave is actuated in plate structure using piezoelectric transducer and the propagating disturbance is measured at distributed piezoelectric transducers as voltage signals. list of schools requiring casper