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Huang H, Li Z, Han C, Wu G, Zhuang Z, Li J, Lin H. Auto-tuning numerical method for acoustic wave simulation using analytical solution. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2023; 2023:1-4. [PMID: 38083535 DOI: 10.1109/embc40787.2023.10341031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2023]
Abstract
Numerical wavefield simulation such as commercial simulation software enables an optimal design of an ultrasound computed tomography (USCT) system for clinical purpose of before prototyping. Such simulator, not developed for optimal design though, can provide rapid implementation for acoustic wave propagation but may lead to unexpected errors during the establishment of numerical model. Here, we propose an auto-tuning numerical method (ATNM), aiming to optimize physical parameters (e.g. grid size, Courant-Friedrichs-Lewy (CFL) number, perfectly matched layer (PML) absorption coefficient, etc) such that the enumerated wavefield computed on those converges to the corresponding analytical solution derived from acoustic scattering theory. We use genetic algorithm (GA) to automatically calibrate numerical wavefield. Our preliminary test is to investigate the best design of PML absorption coefficient for USCT to minimize mean relative error (MRE) between the k-Wave simulation and the analytic model and show its efficacy. The experimental results verify our hypothesis that this calibrated numerical simulator on a simple physical domain is generalizable to any other domains.
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Chen D, Zhao J, Fei C, Li D, Zhu Y, Li Z, Guo R, Lou L, Feng W, Yang Y. Particle Swarm Optimization Algorithm-Based Design Method for Ultrasonic Transducers. MICROMACHINES 2020; 11:mi11080715. [PMID: 32718030 PMCID: PMC7465307 DOI: 10.3390/mi11080715] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2020] [Revised: 07/09/2020] [Accepted: 07/18/2020] [Indexed: 12/21/2022]
Abstract
In order to improve the fabrication efficiency and performance of an ultrasonic transducer (UT), a particle swarm optimization (PSO) algorithm-based design method was established and combined with an electrically equivalent circuit model. The relationship between the design and performance parameters of the UT is described by an electrically equivalent circuit model. Optimality criteria were established according to the desired performance; then, the design parameters were iteratively optimized using a PSO algorithm. The Pb(ZrxTi1-x)O3 (PZT) ceramic UT was designed by the proposed method to verify its effectiveness. A center frequency of 6 MHz and a bandwidth of -6 dB (70%) were the desired performance characteristics. The optimized thicknesses of the piezoelectric and matching layers were 255 μm and 102 μm. The experimental results agree with those determined by the equivalent circuit model, and the center frequency and -6 dB bandwidth of the fabricated UT were 6.3 MHz and 68.25%, respectively, which verifies the effectiveness of the developed optimization design method.
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Affiliation(s)
- Dongdong Chen
- School of Microelectronics, Xidian University, Xi’an 710071, China; (D.C.); (J.Z.); (D.L.); (Y.Z.); (Z.L.); (R.G.); (Y.Y.)
| | - Jianxin Zhao
- School of Microelectronics, Xidian University, Xi’an 710071, China; (D.C.); (J.Z.); (D.L.); (Y.Z.); (Z.L.); (R.G.); (Y.Y.)
| | - Chunlong Fei
- School of Microelectronics, Xidian University, Xi’an 710071, China; (D.C.); (J.Z.); (D.L.); (Y.Z.); (Z.L.); (R.G.); (Y.Y.)
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China;
- Correspondence: (C.F.); (L.L.)
| | - Di Li
- School of Microelectronics, Xidian University, Xi’an 710071, China; (D.C.); (J.Z.); (D.L.); (Y.Z.); (Z.L.); (R.G.); (Y.Y.)
| | - Yuanbo Zhu
- School of Microelectronics, Xidian University, Xi’an 710071, China; (D.C.); (J.Z.); (D.L.); (Y.Z.); (Z.L.); (R.G.); (Y.Y.)
| | - Zhaoxi Li
- School of Microelectronics, Xidian University, Xi’an 710071, China; (D.C.); (J.Z.); (D.L.); (Y.Z.); (Z.L.); (R.G.); (Y.Y.)
| | - Rong Guo
- School of Microelectronics, Xidian University, Xi’an 710071, China; (D.C.); (J.Z.); (D.L.); (Y.Z.); (Z.L.); (R.G.); (Y.Y.)
| | - Lifei Lou
- School of Microelectronics, Xidian University, Xi’an 710071, China; (D.C.); (J.Z.); (D.L.); (Y.Z.); (Z.L.); (R.G.); (Y.Y.)
- Correspondence: (C.F.); (L.L.)
| | - Wei Feng
- Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China;
| | - Yintang Yang
- School of Microelectronics, Xidian University, Xi’an 710071, China; (D.C.); (J.Z.); (D.L.); (Y.Z.); (Z.L.); (R.G.); (Y.Y.)
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Hu M, Sun X, He J, Zhan Y. Double Crack Damage Identification of Welded Steel Structure Based on LAMB WAVES of S0 Mode. MATERIALS (BASEL, SWITZERLAND) 2019; 12:ma12111800. [PMID: 31163605 PMCID: PMC6600749 DOI: 10.3390/ma12111800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 05/30/2019] [Accepted: 05/31/2019] [Indexed: 06/09/2023]
Abstract
Steel structures are widely used in large-span bridges, offshore platforms, mining equipment and other large-scale buildings. The damage of steel structures will cause significant safety risks in a project. Therefore, it is of great significance to identify and study damage to steel structures. In this study, the propagation of Lamb waves in a steel plate with double cracks is simulated. Using finite element analysis and experimental study, damage identification and damage imaging of double crack damage to a steel plate are performed, and the numerical simulation results are in good agreement with the experimental results. Considering the reflection and transmission of Lamb waves at the welding seam, the location and imaging of crack damage in a welded steel plate are also studied. The imaging results obtained from simulation and experiment show high level in accuracy. By comparing the amplitude of the signal in the propagation process, it is concluded that the transmission energy at the weld seam decreases.
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Affiliation(s)
- Muping Hu
- College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China.
| | - Xiaodan Sun
- College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China.
| | - Jian He
- College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China.
| | - Yangyang Zhan
- College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China.
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Ennawaoui C, Lifi H, Hajjaji A, Samuel C, Rguiti M, Touhtouh S, Azim A, Courtois C. Dielectric and mechanical optimization properties of porous poly(ethylene‐
co
‐vinyl acetate) copolymer films for pseudo‐piezoelectric effect. POLYM ENG SCI 2019. [DOI: 10.1002/pen.25132] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Chouaib Ennawaoui
- Laboratoire des Sciences de l'Ingénieur Pour l'EnergieEcole Nationale Des Sciences Appliquées El Jadida, UCD 24000 El Jadida Maroc
- Laboratoire de Mécanique et EnergétiqueFaculté des Sciences El Jadida, UCD 24000 El Jadida Maroc
| | - Houda Lifi
- Laboratoire des Sciences de l'Ingénieur Pour l'EnergieEcole Nationale Des Sciences Appliquées El Jadida, UCD 24000 El Jadida Maroc
- Laboratoire de Physique et des Techniques Nucléaires, Atomiques et MoléculairesFaculté des Sciences El Jadida, UCD 24000 El Jadida Maroc
| | - Abdelowahed Hajjaji
- Laboratoire des Sciences de l'Ingénieur Pour l'EnergieEcole Nationale Des Sciences Appliquées El Jadida, UCD 24000 El Jadida Maroc
| | - Cédric Samuel
- Institut Mines Telecom Lille Douai (IMT Lille Douai), Département Technologie des Polymères et Composites and Ingénierie Mécanique (TPCIM)Ecole Nationale Supérieure Mines Telecom Lille Douai 941 Rue Charles Bourseul, F‐59508 Douai France
- Université de Lille F‐59000 Lille France
| | - Mohamed Rguiti
- EA 2443 ‐ LMCPA ‐ Laboratoire des Matériaux Céramiques et Procédés AssociésUniversité Polytechnique Hauts‐de‐France F‐59313 Valenciennes France
| | - Samira Touhtouh
- Laboratoire des Sciences de l'Ingénieur Pour l'EnergieEcole Nationale Des Sciences Appliquées El Jadida, UCD 24000 El Jadida Maroc
| | - Azeddine Azim
- Laboratoire des Sciences de l'Ingénieur Pour l'EnergieEcole Nationale Des Sciences Appliquées El Jadida, UCD 24000 El Jadida Maroc
- Laboratoire de Mécanique et EnergétiqueFaculté des Sciences El Jadida, UCD 24000 El Jadida Maroc
| | - Christian Courtois
- EA 2443 ‐ LMCPA ‐ Laboratoire des Matériaux Céramiques et Procédés AssociésUniversité Polytechnique Hauts‐de‐France F‐59313 Valenciennes France
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A Spray-on, Nanocomposite-Based Sensor Network for in-Situ Active Structural Health Monitoring. SENSORS 2019; 19:s19092077. [PMID: 31060259 PMCID: PMC6540028 DOI: 10.3390/s19092077] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Revised: 05/01/2019] [Accepted: 05/03/2019] [Indexed: 11/17/2022]
Abstract
A new breed of nanocomposite-based spray-on sensor is developed for in-situ active structural health monitoring (SHM). The novel nanocomposite sensor is rigorously designed with graphene as the nanofiller and polyvinylpyrrolidone (PVP) as the matrix, fabricated using a simple spray deposition process. Electrical analysis, as well as morphological characterization of the spray-on sensor, was conducted to investigate percolation characteristic, in which the optimal threshold (~0.91%) of the graphene/PVP sensor was determined. Owing to the uniform and stable conductive network formed by well-dispersed graphene nanosheets in the PVP matrix, the tailor-made spray-on sensor exhibited excellent piezoresistive performance. By virtue of the tunneling effect of the conductive network, the sensor was proven to be capable of perceiving signals of guided ultrasonic waves (GUWs) with ultrahigh frequency up to 500 kHz. Lightweight and flexible, the spray-on nanocomposite sensor demonstrated superior sensitivity, high fidelity, and high signal-to-noise ratio under dynamic strain with ultralow magnitude (of the order of micro-strain) that is comparable with commercial lead zirconate titanate (PZT) wafers. The sensors were further networked to perform damage characterization, and the results indicate significant application potential of the spray-on nanocomposite-based sensor for in-situ active GUW-based SHM.
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Yang S, Ai Y, Cheng Z, Zhang L, Jia L, Dong B, Zhang B, Wang J, Zhang Y. Method of the out-of-band rejection improvement of the AlN based surface acoustic wave filters. ULTRASONICS 2019; 91:30-33. [PMID: 30056273 DOI: 10.1016/j.ultras.2018.07.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 06/26/2018] [Accepted: 07/16/2018] [Indexed: 06/08/2023]
Abstract
AlN based surface acoustic wave (SAW) filters with an acoustic wavelength (λ) of 8 µm have been fabricated based on sputtered AlN films on sapphire. The acoustic velocity of 1-µm-AlN/Sapphire bilayer structure is 5536 m/s, 60% higher than that of LiNbO3. The central frequency, insertion loss, out-of-band rejection, and bandwidth of fabricated AlN based two-port type SAW filters with a delay gap of λ are 692 MHz, 25.58 dB, 35.40 dB, and 2.7 MHz, respectively. The impact of delay gap on the performance of AlN based filters have been studied experimentally. By the analysis of frequency response of SAW filters with delay gaps of λ, 15λ, and 30λ with and without time gating technique, we find that increase the delay gap of AlN based SAW resonators can improve the out-of-band rejection effectively because of the reduction of electromagnetic coupling, with a cost of a little degradation of insertion loss due to the small propagation loss of AlN/Sapphire bilayer. When the delay gap is increased from λ to 15λ, out-of-band rejection of AlN based filters is increased by 4.75 dB, while the insertion loss is only increased by 0.81 dB. When the delay gap is further increased from 15λ to 30λ, the suppression of out-of-band rejection is not obvious.
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Affiliation(s)
- Shuai Yang
- Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yujie Ai
- Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Zhe Cheng
- Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lian Zhang
- Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lifang Jia
- Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Boyu Dong
- NAURA Technology Group Co., Ltd., Beijing 100176, China
| | - Baohui Zhang
- NAURA Technology Group Co., Ltd., Beijing 100176, China
| | - Junxi Wang
- Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yun Zhang
- Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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