期刊
IEEE SENSORS JOURNAL
卷 22, 期 14, 页码 13958-13970出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2022.3181454
关键词
Transducers; Sensors; Spirals; Dispersion; Beam steering; Geometry; Finite element analysis; Frequency steerable acoustic transducers (FSATs); guided waves (GWs); PZT; structural health monitoring (SHM); transducer simulation
资金
- European Union [GA 860104]
- German Research Foundation [Deutsche Forschungsgemeinschaft (DFG)] [349435502]
This paper presents a novel implementation of Frequency Steerable Acoustic Transducers (FSATs) for guided waves (GWs) inspections. The proposed Piezoceramic FSATs exploit the inherent directional properties of ultrasonic guided waves, leading to significant hardware simplification and cost reductions. Experimental validations using a Scanning Laser Doppler Vibrometer (SLDV) show improved generation of directional GWs in a host structure.
This paper presents a novel implementation of Frequency Steerable Acoustic Transducers (FSATs) for guided waves (GWs) inspections. Unlike the conventional phased array systems, which demand a large number of transducers and complex wiring, FSATs benefit from inherent directional properties for generation and sensing ultrasonic guided waves, resulting in significant hardware simplification and cost reductions for GWs-based systems. The FSATs exploit the frequency-dependent spatial filtering effect, leading to a direct relationship between the direction of propagation and the frequency content of the transmitted signal. The proposed Piezoceramic FSAT is fabricated through patterning the spiral electrodes on a Piezoelectric (PZT) plate bonded on a supporting aluminum plate. In light of the need to investigate the influence of the generated stiffness caused by the PZT plate on the coupling behavior between the FSAT and the aluminum plate, Finite Element (FE) simulations were carried out. Furthermore, experimental validations were conducted using a Scanning Laser Doppler Vibrometer (SLDV) to highlight the directional capabilities of such devices. The results show that the generation of directional GWs in a host structure is substantially improved thanks to the high actuation strength of Piezoceramic materials employed in the proposed transducer.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据