Ultrasonics最新文献_第8页

Static component of nonlinear guided wave as a Preferable indicator of creep damage in superalloys 非线性导波静态分量作为高温合金蠕变损伤的较好指标。

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-19 DOI: 10.1016/j.ultras.2025.107894

Peng Zheng , Xuan Li , Peng Xiao , Zihao Dong , Dazhi Cong , Lishuai Liu , Yanxun Xiang

Nonlinear ultrasonic testing based on second harmonic generation has shown promise for early-stage creep damage detection. However, its practical application is constrained by a strong dependence on mode-matching conditions and signal degradation at advanced damage stages, limiting its effectiveness in complex service environments. Additionally, traditional approaches struggle to reliably characterize microstructural evolution throughout the entire creep process, affecting the accuracy of damage evaluation. To overcome these challenges, this study introduces the static component signal (

β_{0}

) of guided wave propagation into the creep damage assessment of superalloys. This approach broadens the characterization scope of nonlinear ultrasonic responses and enhances detection stability during later creep stages. Experimental results demonstrate that the static component is largely insensitive to mode-matching conditions, with its nonlinear parameter exhibiting a stable, linear increase throughout the creep lifetime. Compared to the second harmonic parameter—which typically exhibits a nonlinear “rise-then-fall” trend—the static component shows improved robustness and practical applicability. This method effectively addresses the limitations of conventional nonlinear ultrasonic techniques for late-stage creep damage detection, offering a valuable complementary tool for structural health monitoring and life assessment of high-temperature materials.

基于二次谐波产生的非线性超声检测在早期蠕变损伤检测中具有广阔的应用前景。然而，它的实际应用受到模式匹配条件的强烈依赖和后期损伤阶段信号退化的限制，限制了它在复杂服务环境中的有效性。此外，传统方法难以在整个蠕变过程中可靠地表征微观组织演变，从而影响损伤评估的准确性。为了克服这些挑战，本研究将导波传播的静态分量信号（β0）引入高温合金蠕变损伤评估中。该方法拓宽了非线性超声响应的表征范围，提高了后期蠕变阶段的检测稳定性。实验结果表明，静态构件对模态匹配条件基本不敏感，其非线性参数在整个蠕变寿命期间呈稳定的线性增长。与二次谐波参数（通常表现出非线性的“先上升后下降”趋势）相比，静态分量显示出更好的鲁棒性和实用性。该方法有效地解决了传统非线性超声技术在后期蠕变损伤检测中的局限性，为高温材料结构健康监测和寿命评估提供了有价值的补充工具。

{"title":"Static component of nonlinear guided wave as a Preferable indicator of creep damage in superalloys","authors":"Peng Zheng , Xuan Li , Peng Xiao , Zihao Dong , Dazhi Cong , Lishuai Liu , Yanxun Xiang","doi":"10.1016/j.ultras.2025.107894","DOIUrl":"10.1016/j.ultras.2025.107894","url":null,"abstract":"<div><div>Nonlinear ultrasonic testing based on second harmonic generation has shown promise for early-stage creep damage detection. However, its practical application is constrained by a strong dependence on mode-matching conditions and signal degradation at advanced damage stages, limiting its effectiveness in complex service environments. Additionally, traditional approaches struggle to reliably characterize microstructural evolution throughout the entire creep process, affecting the accuracy of damage evaluation. To overcome these challenges, this study introduces the static component signal (<span><math><mrow><msub><mi>β</mi><mn>0</mn></msub></mrow></math></span>) of guided wave propagation into the creep damage assessment of superalloys. This approach broadens the characterization scope of nonlinear ultrasonic responses and enhances detection stability during later creep stages. Experimental results demonstrate that the static component is largely insensitive to mode-matching conditions, with its nonlinear parameter exhibiting a stable, linear increase throughout the creep lifetime. Compared to the second harmonic parameter—which typically exhibits a nonlinear “rise-then-fall” trend—the static component shows improved robustness and practical applicability. This method effectively addresses the limitations of conventional nonlinear ultrasonic techniques for late-stage creep damage detection, offering a valuable complementary tool for structural health monitoring and life assessment of high-temperature materials.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"160 ","pages":"Article 107894"},"PeriodicalIF":4.1,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145597667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-destructive characterization of mechanical properties using magnetostrictive magnetoacoustic conversion: Theory and experiment 磁致伸缩磁声转换力学性能的无损表征：理论与实验。

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-18 DOI: 10.1016/j.ultras.2025.107900

Wenbo Cao , Bin Wu , Yuan Yuan , Zhenghong Wang , Xiang Gao , Xiucheng Liu

Mechanical properties are critical parameters of ferromagnetic materials and directly affect their structural reliability and functional stability. Ultrasonic characterization techniques based on the magnetostrictive effect have the advantages of non-contact and high sensitivity. However, the relationship between magnetoacoustic conversion efficiency (MCE) and mechanical properties lacks sufficient theoretical support and the intrinsic mechanism remains unclear. To provide theoretical support for this, a theoretical model of magnetostrictive magnetoacoustic conversion with different mechanical parameters was constructed in this study and the key factors affecting MCE were analyzed in detail for the first time. On this basis, a non-destructive characterization method of evaluating multiple mechanical parameters was developed. Finally, experimental validation was conducted with heat-treated 3Cr13 steel samples. Both theoretical and experimental results showed a significant linear correlation between the mechanical parameters and SH wave MCE curves measured with magnetostrictive transducers. The observed experimental phenomena were consistent with the predicted patterns from the model. This study enriched the magnetoacoustic conversion theory of magnetostrictive ultrasonic transducers and provided new insights into the non-contact and non-destructive characterization of mechanical properties.

力学性能是铁磁材料的关键参数，直接影响铁磁材料的结构可靠性和功能稳定性。基于磁致伸缩效应的超声表征技术具有非接触、灵敏度高的优点。然而，磁声转换效率（MCE）与力学性能之间的关系缺乏足够的理论支持，其内在机制尚不清楚。为了对此提供理论支持，本研究构建了不同力学参数下磁致伸缩磁声转换的理论模型，并首次详细分析了影响磁致伸缩磁声转换的关键因素。在此基础上，提出了一种评估多个力学参数的无损表征方法。最后用热处理后的3Cr13钢试样进行实验验证。理论和实验结果均表明，用磁致伸缩换能器测量的SH波MCE曲线与力学参数之间存在显著的线性相关。观察到的实验现象与模型预测的模式一致。该研究丰富了磁致伸缩超声换能器的磁声转换理论，为其非接触、无损的力学性能表征提供了新的见解。

{"title":"Non-destructive characterization of mechanical properties using magnetostrictive magnetoacoustic conversion: Theory and experiment","authors":"Wenbo Cao , Bin Wu , Yuan Yuan , Zhenghong Wang , Xiang Gao , Xiucheng Liu","doi":"10.1016/j.ultras.2025.107900","DOIUrl":"10.1016/j.ultras.2025.107900","url":null,"abstract":"<div><div>Mechanical properties are critical parameters of ferromagnetic materials and directly affect their structural reliability and functional stability. Ultrasonic characterization techniques based on the magnetostrictive effect have the advantages of non-contact and high sensitivity. However, the relationship between magnetoacoustic conversion efficiency (MCE) and mechanical properties lacks sufficient theoretical support and the intrinsic mechanism remains unclear. To provide theoretical support for this, a theoretical model of magnetostrictive magnetoacoustic conversion with different mechanical parameters was constructed in this study and the key factors affecting MCE were analyzed in detail for the first time. On this basis, a non-destructive characterization method of evaluating multiple mechanical parameters was developed. Finally, experimental validation was conducted with heat-treated 3Cr13 steel samples. Both theoretical and experimental results showed a significant linear correlation between the mechanical parameters and SH wave MCE curves measured with magnetostrictive transducers. The observed experimental phenomena were consistent with the predicted patterns from the model. This study enriched the magnetoacoustic conversion theory of magnetostrictive ultrasonic transducers and provided new insights into the non-contact and non-destructive characterization of mechanical properties.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"160 ","pages":"Article 107900"},"PeriodicalIF":4.1,"publicationDate":"2025-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145605870","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Feasibility of deep learning-based cancer detection in ultrasound microvascular images 基于深度学习的超声微血管图像癌症检测的可行性

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-15 DOI: 10.1016/j.ultras.2025.107892

Kathlyne Jayne B. Bautista , Thomas M. Kierski , Isabel G. Newsome , Hae Rim Lee , Wesley R. Legant , David S. Lalush , Paul A. Dayton

Acoustic angiography is a superharmonic contrast-enhanced ultrasound modality that maps 3-D microvasculature with fine spatial resolutions and has demonstrated potential to improve disease detection. However, the application of acoustic angiography for cancer detection currently faces challenges. Quantitative analysis relies on time-consuming, manual segmentation of individual vessels, and inter-operator variability limits reader-based discrimination. This feasibility study aims to address the limitations of current approaches with deep learning for efficient and accurate detection of tumor-associated vasculature in vivo and to validate against quantitative methods that evaluate vascular morphology. Convolutional neural networks (CNNs), namely EfficientNet, ResNet, and DenseNet, were trained on a newly collected dataset of acoustic angiography volumes (n = 195 with 98 controls and 97 tumors) in rodents using a nested cross-validation study. The best performing model, 3-D EfficientNet-B0, achieved a mean classification accuracy of 0.928 ± 0.034 with high sensitivity and specificity, comparable to previously published results. Comparison with quantitative methods in tumor cases showed correlation between high network attention regions and morphological features typically associated with malignant vessels, including increased density and tortuosity. These results highlight the efficiency and accuracy of end-to-end CNNs for tumor detection in acoustic angiography volumes, validated by known markers of malignancy.

超声血管造影术是一种超谐波增强超声成像技术，它能以精细的空间分辨率绘制三维微血管，并已证明有潜力改善疾病检测。然而，超声血管造影在癌症检测中的应用目前面临着挑战。定量分析依赖于耗时的单个血管的人工分割，操作人员之间的可变性限制了基于读者的区分。这项可行性研究旨在解决当前深度学习方法的局限性，以有效和准确地检测体内肿瘤相关血管，并验证评估血管形态的定量方法。卷积神经网络（cnn），即高效神经网络（EfficientNet）、ResNet和DenseNet，采用巢式交叉验证研究方法，在新收集的啮齿动物声学血管造影体积数据集（n = 195, 98个对照组和97个肿瘤）上进行训练。表现最好的3-D EfficientNet-B0模型的平均分类准确率为0.928±0.034，具有较高的灵敏度和特异性，与先前发表的结果相当。与肿瘤病例的定量方法比较发现，高网络注意区与典型的恶性血管相关的形态学特征相关，包括密度增加和扭曲。这些结果强调了端到端cnn在声学血管造影体积中检测肿瘤的效率和准确性，并得到了已知恶性肿瘤标志物的验证。

{"title":"Feasibility of deep learning-based cancer detection in ultrasound microvascular images","authors":"Kathlyne Jayne B. Bautista , Thomas M. Kierski , Isabel G. Newsome , Hae Rim Lee , Wesley R. Legant , David S. Lalush , Paul A. Dayton","doi":"10.1016/j.ultras.2025.107892","DOIUrl":"10.1016/j.ultras.2025.107892","url":null,"abstract":"<div><div>Acoustic angiography is a superharmonic contrast-enhanced ultrasound modality that maps 3-D microvasculature with fine spatial resolutions and has demonstrated potential to improve disease detection. However, the application of acoustic angiography for cancer detection currently faces challenges. Quantitative analysis relies on time-consuming, manual segmentation of individual vessels, and inter-operator variability limits reader-based discrimination. This feasibility study aims to address the limitations of current approaches with deep learning for efficient and accurate detection of tumor-associated vasculature <em>in vivo</em> and to validate against quantitative methods that evaluate vascular morphology. Convolutional neural networks (CNNs), namely EfficientNet, ResNet, and DenseNet, were trained on a newly collected dataset of acoustic angiography volumes (<em>n</em> = 195 with 98 controls and 97 tumors) in rodents using a nested cross-validation study. The best performing model, 3-D EfficientNet-B0, achieved a mean classification accuracy of 0.928 ± 0.034 with high sensitivity and specificity, comparable to previously published results. Comparison with quantitative methods in tumor cases showed correlation between high network attention regions and morphological features typically associated with malignant vessels, including increased density and tortuosity. These results highlight the efficiency and accuracy of end-to-end CNNs for tumor detection in acoustic angiography volumes, validated by known markers of malignancy.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"160 ","pages":"Article 107892"},"PeriodicalIF":4.1,"publicationDate":"2025-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145570269","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Looseness monitoring of Multi-Bolt connection using acoustic emission 多螺栓连接松动的声发射监测。

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-15 DOI: 10.1016/j.ultras.2025.107895

S.A. Hoseini Sabzevari , M.H. Jalal Kamali

A novel approach based on low sampling rate data is proposed to detect early-stage bolt looseness in structural joints. This study investigates how bolt loosening affects the acoustic emission signal in a multi-bolt connection using low sampling rates. Utilizing a low sampling rate sensor enables continuous and cost-effective structural health monitoring. To validate the method, an experimental set-up was conducted on carbon steel plates fastened with M8 bolts. The proposed technique consists of two main stages. First, the effect of bolt loosening in a single-bolt joint on acoustic signals is analyzed. Second, various bolt loosening configurations are examined in a linear three-bolt setup. The influence of different permutations of bolt looseness in the linear arrangement on the final results is also discussed. The results indicate that even in the presence of fully tightened bolts capable of transmitting stress waves, the initiation of loosening can be successfully detected using time–frequency domain features combined with support vector machine (SVM) classification. Experimental results demonstrate that the proposed method achieves an accuracy of 97.53 % in detecting early-stage bolt looseness. The findings highlight the method’s potential as a practical and scalable solution for improving the safety and reliability of bolted connections in industrial applications.

提出了一种基于低采样率数据的结构节点螺栓早期松动检测方法。本文研究了低采样率下螺栓松动对多螺栓连接声发射信号的影响。利用低采样率传感器可以实现连续和经济高效的结构健康监测。为了验证该方法，在M8螺栓紧固的碳钢板上进行了实验设置。所提出的技术包括两个主要阶段。首先，分析了单螺栓连接中螺栓松动对声信号的影响。其次，在线性三螺栓设置中检查各种螺栓松动配置。讨论了线形布置中螺栓松动的不同排列对最终结果的影响。结果表明，即使在完全拧紧的螺栓能够传播应力波的情况下，使用时频域特征结合支持向量机（SVM）分类也可以成功地检测到松动的开始。实验结果表明，该方法检测螺栓早期松动的准确率为97.53%。该研究结果强调了该方法作为一种实用且可扩展的解决方案的潜力，可以提高螺栓连接在工业应用中的安全性和可靠性。

{"title":"Looseness monitoring of Multi-Bolt connection using acoustic emission","authors":"S.A. Hoseini Sabzevari , M.H. Jalal Kamali","doi":"10.1016/j.ultras.2025.107895","DOIUrl":"10.1016/j.ultras.2025.107895","url":null,"abstract":"<div><div>A novel approach based on low sampling rate data is proposed to detect early-stage bolt looseness in structural joints. This study investigates how bolt loosening affects the acoustic emission signal in a multi-bolt connection using low sampling rates. Utilizing a low sampling rate sensor enables continuous and cost-effective structural health monitoring. To validate the method, an experimental set-up was conducted on carbon steel plates fastened with M8 bolts. The proposed technique consists of two main stages. First, the effect of bolt loosening in a single-bolt joint on acoustic signals is analyzed. Second, various bolt loosening configurations are examined in a linear three-bolt setup. The influence of different permutations of bolt looseness in the linear arrangement on the final results is also discussed. The results indicate that even in the presence of fully tightened bolts capable of transmitting stress waves, the initiation of loosening can be successfully detected using time–frequency domain features combined with support vector machine (SVM) classification. Experimental results demonstrate that the proposed method achieves an accuracy of 97.53 % in detecting early-stage bolt looseness. The findings highlight the method’s potential as a practical and scalable solution for improving the safety and reliability of bolted connections in industrial applications.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"160 ","pages":"Article 107895"},"PeriodicalIF":4.1,"publicationDate":"2025-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145557807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A theoretical model for predicting the ultrasonic signals in cylindrical waveguide generated by EMATs 一种预测emat产生的圆柱波导超声信号的理论模型。

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-15 DOI: 10.1016/j.ultras.2025.107887

Xi Li, Zhichao Li, Shujuan Wang, Runjie Yang, Ce Li

Developing a numerical model that accurately predicts ultrasonic signals in cylinders without relying on the finite element (FE) method can significantly improve computational efficiency. However, existing models capable of predicting received ultrasonic signals by electromagnetic acoustic transducers (EMATs) in cylindrical structures remain limited. To address this gap, this paper presents a theoretical model for predicting ultrasonic signals in finite-length cylinders excited by EMATs. The model comprehensively incorporates the entire EMAT operation process, including the excitation, propagation, and reception of ultrasonic waves. Analytical expressions of the trailing pulses are first derived based on the Pochhammer–Chree theory, revealing that these pulses originate from the superposition of guided waves. Subsequently, a numerical model is developed to calculate the time-domain signals received by EMATs through modal analysis. The effectiveness and accuracy of the proposed model are validated through comparisons with FE simulations and experimental results. The findings demonstrate that the model can accurately predict the ultrasonic wave modes and key signal characteristics, including waveform, amplitude, and trailing-wave periodicity, under varying EMAT parameters. This study provides a fast and accurate approach for predicting and interpreting ultrasonic responses generated and received by EMATs in cylindrical structures.

建立一种不依赖有限元法准确预测缸内超声信号的数值模型可以显著提高计算效率。然而，现有的能够预测圆柱形结构中电磁声换能器（EMATs）接收的超声波信号的模型仍然有限。为了解决这一问题，本文提出了一个理论模型来预测有限长度圆柱体中由emat激发的超声信号。该模型综合考虑了EMAT的整个工作过程，包括超声波的激发、传播和接收。首先根据波查哈默-克里理论推导了尾随脉冲的解析表达式，揭示了这些脉冲源于导波的叠加。随后，通过模态分析，建立了EMATs接收时域信号的数值模型。通过与有限元模拟和实验结果的比较，验证了该模型的有效性和准确性。结果表明，该模型能够准确预测不同EMAT参数下的超声波形模式和关键信号特征，包括波形、幅值和尾波周期。该研究提供了一种快速准确的方法来预测和解释圆柱形结构中emat产生和接收的超声波响应。

{"title":"A theoretical model for predicting the ultrasonic signals in cylindrical waveguide generated by EMATs","authors":"Xi Li, Zhichao Li, Shujuan Wang, Runjie Yang, Ce Li","doi":"10.1016/j.ultras.2025.107887","DOIUrl":"10.1016/j.ultras.2025.107887","url":null,"abstract":"<div><div>Developing a numerical model that accurately predicts ultrasonic signals in cylinders without relying on the finite element (FE) method can significantly improve computational efficiency. However, existing models capable of predicting received ultrasonic signals by electromagnetic acoustic transducers (EMATs) in cylindrical structures remain limited. To address this gap, this paper presents a theoretical model for predicting ultrasonic signals in finite-length cylinders excited by EMATs. The model comprehensively incorporates the entire EMAT operation process, including the excitation, propagation, and reception of ultrasonic waves. Analytical expressions of the trailing pulses are first derived based on the Pochhammer–Chree theory, revealing that these pulses originate from the superposition of guided waves. Subsequently, a numerical model is developed to calculate the time-domain signals received by EMATs through modal analysis. The effectiveness and accuracy of the proposed model are validated through comparisons with FE simulations and experimental results. The findings demonstrate that the model can accurately predict the ultrasonic wave modes and key signal characteristics, including waveform, amplitude, and trailing-wave periodicity, under varying EMAT parameters. This study provides a fast and accurate approach for predicting and interpreting ultrasonic responses generated and received by EMATs in cylindrical structures.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"160 ","pages":"Article 107887"},"PeriodicalIF":4.1,"publicationDate":"2025-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145557803","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessing myocardial stiffness with transient elastography using catheter-compatible miniature actuator 用导管兼容微型驱动器瞬态弹性成像评估心肌刚度

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-14 DOI: 10.1016/j.ultras.2025.107893

Samuel M.A. Morais , Andrei B. Karpiouk , Donald J. VanderLaan , Muralidhar Padala , Stanislav Y. Emelianov

This study presents a proof-of-concept miniaturized transient elastography (TE) framework for measuring myocardial elasticity during catheter-based cardiac procedures. Recognizing that mechanical properties of myocardial tissue, particularly the shear modulus, offer valuable insight into the development and progression of cardiovascular conditions such as heart failure, we propose a TE system that can be integrated into existing intracardiac catheters. A miniature (2 mm × 2 mm) piezoelectric actuator was used to generate longitudinal shear waves (LSWs) in tissue-mimicking phantoms with varying shear moduli levels and in ex vivo porcine heart tissue. For validation, an ultrasound array transducer was used in this study to visualize the propagation of the LSWs generated by the actuator. Spatiotemporal displacement maps were analyzed to estimate shear wave speeds and corresponding shear moduli, with TE results showing strong agreement with values obtained using conventional acoustic radiation force-based shear wave elasticity imaging (SWEI). The TE and SWEI measurements showed no statistically significant differences. Ex vivo tissue measurements performed in different orientations relative to myocardial fiber direction confirmed the system’s sensitivity to tissue anisotropy. Additionally, the technique successfully distinguished between fresh and fixed heart tissue, detecting a noticeable increase in stiffness due to preservation. These findings support the feasibility of a catheter-integrated TE device as a functional extension of existing clinical workflows, offering quantitative assessment of myocardial elasticity during routine catheterization procedures.

本研究提出了一种概念验证的小型化瞬态弹性成像（TE）框架，用于测量导管心脏手术期间的心肌弹性。认识到心肌组织的力学特性，特别是剪切模量，为心力衰竭等心血管疾病的发展和进展提供了有价值的见解，我们提出了一种可以集成到现有心内导管中的TE系统。采用微型（2mm × 2mm）压电致动器在不同剪切模量的模拟组织模型和离体猪心脏组织中产生纵向剪切波（LSWs）。为了验证，在本研究中使用了超声波阵列换能器来可视化执行器产生的lsw的传播。通过分析时空位移图来估计剪切波速和相应的剪切模量，TE结果与传统的基于声辐射力的剪切波弹性成像（SWEI）得到的结果非常吻合。TE和SWEI测量结果无统计学差异。在相对于心肌纤维方向的不同方向上进行的离体组织测量证实了该系统对组织各向异性的敏感性。此外，该技术成功地区分了新鲜和固定的心脏组织，检测到由于保存而明显增加的硬度。这些发现支持导管集成TE设备作为现有临床工作流程的功能扩展的可行性，在常规导管置入过程中提供心肌弹性的定量评估。

{"title":"Assessing myocardial stiffness with transient elastography using catheter-compatible miniature actuator","authors":"Samuel M.A. Morais , Andrei B. Karpiouk , Donald J. VanderLaan , Muralidhar Padala , Stanislav Y. Emelianov","doi":"10.1016/j.ultras.2025.107893","DOIUrl":"10.1016/j.ultras.2025.107893","url":null,"abstract":"<div><div>This study presents a proof-of-concept miniaturized transient elastography (TE) framework for measuring myocardial elasticity during catheter-based cardiac procedures. Recognizing that mechanical properties of myocardial tissue, particularly the shear modulus, offer valuable insight into the development and progression of cardiovascular conditions such as heart failure, we propose a TE system that can be integrated into existing intracardiac catheters. A miniature (2 mm × 2 mm) piezoelectric actuator was used to generate longitudinal shear waves (LSWs) in tissue-mimicking phantoms with varying shear moduli levels and in <em>ex vivo</em> porcine heart tissue. For validation, an ultrasound array transducer was used in this study to visualize the propagation of the LSWs generated by the actuator. Spatiotemporal displacement maps were analyzed to estimate shear wave speeds and corresponding shear moduli, with TE results showing strong agreement with values obtained using conventional acoustic radiation force-based shear wave elasticity imaging (SWEI). The TE and SWEI measurements showed no statistically significant differences. <em>Ex vivo</em> tissue measurements performed in different orientations relative to myocardial fiber direction confirmed the system’s sensitivity to tissue anisotropy. Additionally, the technique successfully distinguished between fresh and fixed heart tissue, detecting a noticeable increase in stiffness due to preservation. These findings support the feasibility of a catheter-integrated TE device as a functional extension of existing clinical workflows, offering quantitative assessment of myocardial elasticity during routine catheterization procedures.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"160 ","pages":"Article 107893"},"PeriodicalIF":4.1,"publicationDate":"2025-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145528124","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Low-voltage traveling wave rotary ultrasonic motor based on piezoelectric bimorph 基于压电双晶片的低压行波旋转超声电机。

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-13 DOI: 10.1016/j.ultras.2025.107890

Lin Yang, Jie Zhang, Yue Xiong, Xinwei Hong, Zhuping Lan, Ait Benali Nada, Huafeng Li

To solve the problem of high driving voltage of traditional traveling wave rotary ultrasonic motor (TRUM), a low-voltage traveling wave rotary ultrasonic motor is proposed by using a piezoelectric bimorph. First, the whole structure of the motor is proposed, the principle of low-voltage drive is revealed, and the arrangement of the piezoelectric bimorph is designed. Secondly, the finite element (FE) simulation of the stator and the whole machine is carried out to study the influence of different conditions on the output performance of the motor. Finally, a prototype is made and an experimental platform is built to verify the feasibility and correctness of the design. The research results indicate that this design retains the advantages of traditional structures while also possessing the advantages of low-voltage driving.

针对传统行波旋转超声电机（TRUM）驱动电压高的问题，提出了一种采用压电双晶片的低压行波旋转超声电机。首先，提出了电机的整体结构，揭示了低压驱动的原理，并设计了压电双晶片的布置。其次，对定子及整机进行有限元仿真，研究不同工况对电机输出性能的影响。最后，制作了样机并搭建了实验平台，验证了设计的可行性和正确性。研究结果表明，该设计既保留了传统结构的优点，又具有低压驱动的优点。

引用次数: 0

Assessment of the uncertainty of shear wave speed measurements in ultrasound elastography 超声弹性成像中横波速度测量的不确定度评定。

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-13 DOI: 10.1016/j.ultras.2025.107891

A.V. Alvarenga , K.V. Ramnarine , H. Koruk , S. Rajagopal

Accurate measurement of tissue mechanical properties is crucial for diagnosing and characterising various pathological conditions. Among these properties, shear wave speed (SWS) is an indicator of tissue stiffness and has been widely studied across multiple imaging modalities. Despite its advantages, the quantification of SWS is subject to various sources of uncertainty, which can impact its clinical and research applications. The uncertainty of SWS measurements based on acoustic radiation force impulse (ARFI) technology implemented using a research ultrasound system is investigated in this study. A linear array ultrasound transducer with 128 elements and a transmit frequency of 5.2 MHz was employed for both pushing and tracking. The contributions of different factors, including the effects of displacement estimator, speckle and temperature variation, to the overall measurement uncertainty were assessed using tissue-mimicking phantoms. The compiled uncertainty budget provided an expanded uncertainty of 8 % for the identified SWS, offering an in-depth understanding of the systematic effects influencing SWS and Young’s modulus measurements in ultrasound elastography. The findings in this study aim to enhance the reliability of ultrasound elastography as a diagnostic tool and to provide a foundation for future studies.

准确测量组织力学性能是诊断和表征各种病理条件的关键。在这些特性中，横波速度（SWS）是组织刚度的一个指标，在多种成像方式中得到了广泛的研究。尽管SWS具有诸多优势，但其量化仍存在各种不确定性，这可能会影响其临床和研究应用。本文研究了基于声辐射力脉冲（ARFI）技术的SWS测量的不确定度。采用128个单元的线阵超声换能器，发射频率为5.2 MHz，用于推进和跟踪。利用组织模拟模型评估了位移估计器、散斑和温度变化等不同因素对总体测量不确定度的影响。编制的不确定度预算为确定的SWS提供了8%的扩展不确定度，从而深入了解超声弹性成像中影响SWS和杨氏模量测量的系统效应。本研究结果旨在提高超声弹性成像作为诊断工具的可靠性，并为今后的研究提供基础。

{"title":"Assessment of the uncertainty of shear wave speed measurements in ultrasound elastography","authors":"A.V. Alvarenga , K.V. Ramnarine , H. Koruk , S. Rajagopal","doi":"10.1016/j.ultras.2025.107891","DOIUrl":"10.1016/j.ultras.2025.107891","url":null,"abstract":"<div><div>Accurate measurement of tissue mechanical properties is crucial for diagnosing and characterising various pathological conditions. Among these properties, shear wave speed (SWS) is an indicator of tissue stiffness and has been widely studied across multiple imaging modalities. Despite its advantages, the quantification of SWS is subject to various sources of uncertainty, which can impact its clinical and research applications. The uncertainty of SWS measurements based on acoustic radiation force impulse (ARFI) technology implemented using a research ultrasound system is investigated in this study. A linear array ultrasound transducer with 128 elements and a transmit frequency of 5.2 MHz was employed for both pushing and tracking. The contributions of different factors, including the effects of displacement estimator, speckle and temperature variation, to the overall measurement uncertainty were assessed using tissue-mimicking phantoms. The compiled uncertainty budget provided an expanded uncertainty of 8 % for the identified SWS, offering an in-depth understanding of the systematic effects influencing SWS and Young’s modulus measurements in ultrasound elastography. The findings in this study aim to enhance the reliability of ultrasound elastography as a diagnostic tool and to provide a foundation for future studies.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"160 ","pages":"Article 107891"},"PeriodicalIF":4.1,"publicationDate":"2025-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145551208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling and simulation of zero-group-velocity combined harmonic generated by two counter-directional Lamb waves mixing in an adhesively bonded plate 粘接板中两个反向兰姆波混合产生的零群速组合谐波的建模与仿真。

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-10 DOI: 10.1016/j.ultras.2025.107889

Han Chen , Mingxi Deng , Yan Chen , Guangjian Gao , Yunshan Bai

The zero-group-velocity (ZGV) mode of Lamb waves exhibits unique characteristics, where acoustic energy is trapped within localized regions of the waveguide. Previous research has established that ZGV combined harmonics — generated through the nonlinear interaction of frequency mixing response (FMR) — serve as highly sensitive tools for probing local material nonlinearity. In this study, we present a modeling and numerical analysis of ZGV combined harmonics produced by the mixing of two counter-directional Lamb waves in an adhesively bonded plate, explicitly considering the influence of interfacial properties on FMR efficiency. Based on theoretical analysis, a specific Lamb wave mode triplet is selected to ensure satisfaction of the internal resonance condition. The generation of ZGV combined harmonics at the sum frequency, arising from the interaction of counter-propagating Lamb waves within the plate, is systematically modeled. The results indicate that the efficiency of combined-harmonic generation for sensitive response correlates with the acoustic energy trapping characteristics of ZGV modes. Critically, the spatial location accuracy of the wave mixing phenomenon depends on the central position of the interaction zone rather than its length. Thus, there is no requirement to optimize the mixing zone length for both spatial resolution and signal clarity simultaneously; this inherent balance enhances the applicability of FMR-based nonlinear methods. Finite element (FE) simulations demonstrated that localized interfacial degradation can be detected and characterized by scanning the wave mixing zone of the two primary Lamb waves. The numerical analysis further validated the method’s capability to identify multiple localized degradations with varying severity and length in bonded structures. This work elucidates the physical mechanisms underlying ZGV combined-harmonic generation in adhesively bonded plates and presents a promising approach for non-destructive assessment of interfacial integrity via counter-directional Lamb wave mixing.

兰姆波的零群速度（ZGV）模式表现出独特的特性，其中声能被困在波导的局部区域内。以往的研究已经证实，通过频率混合响应（FMR）的非线性相互作用产生的ZGV组合谐波可以作为探测材料局部非线性的高灵敏度工具。在本研究中，我们对粘接板中两个反向兰姆波混合产生的ZGV组合谐波进行了建模和数值分析，明确考虑了界面特性对FMR效率的影响。在理论分析的基础上，选择了特定的兰姆波模式三重态，以保证满足内部谐振条件。系统地模拟了板内反传播兰姆波相互作用在和频处产生的ZGV组合谐波。结果表明，敏感响应的组合谐波产生效率与ZGV模式的声能捕获特性有关。重要的是，混合波现象的空间定位精度取决于相互作用带的中心位置，而不是其长度。因此，不需要同时对空间分辨率和信号清晰度进行混合区长度优化；这种内在的平衡增强了基于fmr的非线性方法的适用性。有限元模拟表明，通过扫描两主兰姆波的混波区，可以检测和表征局部界面退化。数值分析进一步验证了该方法识别键合结构中多个不同程度和长度的局部退化的能力。这项工作阐明了粘接板中ZGV组合谐波产生的物理机制，并提出了一种通过反向兰姆波混频无损评估界面完整性的有前途的方法。

{"title":"Modeling and simulation of zero-group-velocity combined harmonic generated by two counter-directional Lamb waves mixing in an adhesively bonded plate","authors":"Han Chen , Mingxi Deng , Yan Chen , Guangjian Gao , Yunshan Bai","doi":"10.1016/j.ultras.2025.107889","DOIUrl":"10.1016/j.ultras.2025.107889","url":null,"abstract":"<div><div>The zero-group-velocity (ZGV) mode of Lamb waves exhibits unique characteristics, where acoustic energy is trapped within localized regions of the waveguide. Previous research has established that ZGV combined harmonics — generated through the nonlinear interaction of frequency mixing response (FMR) — serve as highly sensitive tools for probing local material nonlinearity. In this study, we present a modeling and numerical analysis of ZGV combined harmonics produced by the mixing of two counter-directional Lamb waves in an adhesively bonded plate, explicitly considering the influence of interfacial properties on FMR efficiency. Based on theoretical analysis, a specific Lamb wave mode triplet is selected to ensure satisfaction of the internal resonance condition. The generation of ZGV combined harmonics at the sum frequency, arising from the interaction of counter-propagating Lamb waves within the plate, is systematically modeled. The results indicate that the efficiency of combined-harmonic generation for sensitive response correlates with the acoustic energy trapping characteristics of ZGV modes. Critically, the spatial location accuracy of the wave mixing phenomenon depends on the central position of the interaction zone rather than its length. Thus, there is no requirement to optimize the mixing zone length for both spatial resolution and signal clarity simultaneously; this inherent balance enhances the applicability of FMR-based nonlinear methods. Finite element (FE) simulations demonstrated that localized interfacial degradation can be detected and characterized by scanning the wave mixing zone of the two primary Lamb waves. The numerical analysis further validated the method’s capability to identify multiple localized degradations with varying severity and length in bonded structures. This work elucidates the physical mechanisms underlying ZGV combined-harmonic generation in adhesively bonded plates and presents a promising approach for non-destructive assessment of interfacial integrity via counter-directional Lamb wave mixing.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"160 ","pages":"Article 107889"},"PeriodicalIF":4.1,"publicationDate":"2025-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145557855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Non-destructive ultrasonic thermometry for internal temperature field mapping in high-speed aircraft structures 高速飞机结构内部温度场测绘的无损超声测温。

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-09 DOI: 10.1016/j.ultras.2025.107888

Yue Cui, Shenshen Liu, Jing Xiang, Youan Shi, Dong Wei, Yanxia Du, Yewei Gui

A non-destructive ultrasonic-based method is proposed to measure the surface heat flux and internal temperature field of high-speed aircraft structural shells during service. First, a mathematical model for ultrasonic temperature measurement is established, followed by the development of a dedicated measurement system. To meet flight test requirements, the ultrasonic device is upgraded with optimized miniaturization and high-temperature resistance. The experimental scheme is designed, and the ground verification experiment is carried out on the basis of the improved device, and preliminary results validate the reliability of both the ultrasonic method and the measurement instrument. Subsequently, an ultrasonic temperature measurement device is deployed onboard a high-speed aircraft for the first time, enabling real-time determination of one-dimensional temperature distributions along the wall thickness direction and outer wall heat flux at specific measurement points. The results are closely aligned with those obtained from K-type thermocouples. Both ground and flight tests demonstrate that the ultrasonic method effectively captures transient temperature distributions within high-speed aircraft structures, offering a novel, non-invasive solution for thermal parameter measurement and thermal safety assessment.

提出了一种基于非破坏性超声的高速飞机结构壳体在服役过程中表面热流密度和内部温度场测量方法。首先，建立了超声测温的数学模型，然后开发了专用的测量系统。为满足飞行试验要求，对超声装置进行了升级，优化了小型化和耐高温性能。设计了实验方案，并在改进装置的基础上进行了地面验证实验，初步结果验证了超声方法和测量仪器的可靠性。随后，首次在高速飞行器上部署了超声测温装置，实现了对特定测点沿壁厚方向的一维温度分布和外壁热流密度的实时测定。结果与k型热电偶的结果一致。地面和飞行试验表明，超声方法有效地捕获了高速飞机结构内部的瞬态温度分布，为热参数测量和热安全评估提供了一种新颖的、无创的解决方案。

{"title":"Non-destructive ultrasonic thermometry for internal temperature field mapping in high-speed aircraft structures","authors":"Yue Cui, Shenshen Liu, Jing Xiang, Youan Shi, Dong Wei, Yanxia Du, Yewei Gui","doi":"10.1016/j.ultras.2025.107888","DOIUrl":"10.1016/j.ultras.2025.107888","url":null,"abstract":"<div><div>A non-destructive ultrasonic-based method is proposed to measure the surface heat flux and internal temperature field of high-speed aircraft structural shells during service. First, a mathematical model for ultrasonic temperature measurement is established, followed by the development of a dedicated measurement system. To meet flight test requirements, the ultrasonic device is upgraded with optimized miniaturization and high-temperature resistance. The experimental scheme is designed, and the ground verification experiment is carried out on the basis of the improved device, and preliminary results validate the reliability of both the ultrasonic method and the measurement instrument. Subsequently, an ultrasonic temperature measurement device is deployed onboard a high-speed aircraft for the first time, enabling real-time determination of one-dimensional temperature distributions along the wall thickness direction and outer wall heat flux at specific measurement points. The results are closely aligned with those obtained from K-type thermocouples. Both ground and flight tests demonstrate that the ultrasonic method effectively captures transient temperature distributions within high-speed aircraft structures, offering a novel, non-invasive solution for thermal parameter measurement and thermal safety assessment.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"159 ","pages":"Article 107888"},"PeriodicalIF":4.1,"publicationDate":"2025-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145507296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0