Ultrasonics最新文献_第7页

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

Ultrasonics Pub Date : 2026-04-01 Epub Date: 2025-11-15 DOI: 10.1016/j.ultras.2025.107895

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

{"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":"2026-04-01","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 Nitinol Langevin transducer with resonance tuneability for adaptive ultrasonic applications 一种适用于自适应超声应用的镍钛诺朗格万换能器

IF 4.1 2区物理与天体物理

Ultrasonics Pub Date : 2026-04-01 Epub Date: 2025-12-03 DOI: 10.1016/j.ultras.2025.107916

Mahshid Hafezi , Yuchen Liu , Andrew Feeney

{"title":"A Nitinol Langevin transducer with resonance tuneability for adaptive ultrasonic applications","authors":"Mahshid Hafezi , Yuchen Liu , Andrew Feeney","doi":"10.1016/j.ultras.2025.107916","DOIUrl":"10.1016/j.ultras.2025.107916","url":null,"abstract":"<div><div>In power ultrasonics, the Langevin ultrasonic transducer has been widely utilised across medical and industrial applications, including for bone surgery, food cutting, and cavitation generation. Transducers for these applications are typically tuned to a fundamental operating mode, often the first longitudinal, for optimal interaction with a target material or structure. Currently, there is a growing interest in ultrasonic devices with tuneable dynamic properties, including resonance frequency, for optimising performance in these applications. To overcome limited frequency tuning capabilities of current configurations, this study demonstrates a Langevin transducer which is designed and fabricated incorporating the shape memory alloy Nitinol as its end masses. The rationale is that the change in elastic properties of these end masses with temperature will induce a change in the fundamental resonance frequency of the transducer, thereby demonstrating a viable and novel approach to controlling resonance frequency. Laser Doppler Vibrometry was used to characterise the first and third longitudinal modes at room temperature, correlating closely with finite element analysis results. Harmonic analysis was then conducted at various environmental temperatures to show changes in the resonance frequencies and vibration amplitudes of both modes as functions of temperature. The tuneable resonance of the Nitinol Langevin transducer (NLT) has a dependency on changes in the thermomechanical properties of Nitinol from its martensitic phase transformation, demonstrated through structural design factors. The transducer exhibits maximum resonance frequency increases of above 15 % and 10 % for the L1 and L3 modes respectively, between 30 °C and 100 °C. This research enables a new generation of Langevin ultrasonic transducers fabricated using advanced materials for multifrequency and tuneable resonance applications.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"160 ","pages":"Article 107916"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145681579","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

Flexible zoom lens module with Polyhedral cylindrical linear ultrasonic Motor-Actuated transparent elastomer 柔性变焦镜头模块与多面体圆柱形线性超声电机驱动的透明弹性体

IF 4.1 2区物理与天体物理

Ultrasonics Pub Date : 2026-04-01 Epub Date: 2025-11-24 DOI: 10.1016/j.ultras.2025.107911

Zhongying Wang , Menghui Liu , Chenyu Liang , Gaoren Zhang , Hongtao Xia , Shouhua Ren , Yixin Wang , Bochao Zhang , Changsu Wang , Jian Qi , Yonggang Guo

{"title":"Flexible zoom lens module with Polyhedral cylindrical linear ultrasonic Motor-Actuated transparent elastomer","authors":"Zhongying Wang , Menghui Liu , Chenyu Liang , Gaoren Zhang , Hongtao Xia , Shouhua Ren , Yixin Wang , Bochao Zhang , Changsu Wang , Jian Qi , Yonggang Guo","doi":"10.1016/j.ultras.2025.107911","DOIUrl":"10.1016/j.ultras.2025.107911","url":null,"abstract":"<div><div>Traditional zoom lenses employ multiple solid lens elements and electromagnetic driving mechanisms. This results in complex structures and large sizes. These limitations significantly restrict their application in compact optical systems where miniaturization is critical. To address this issue, this paper presents a flexible zoom lens module. This module is driven by a cylindrical ultrasonic motor (CYUSM). The CYUSM comprises a stator, a hollow mover, and piezoelectric ceramic (PZT) elements. It acts as a direct-drive actuator to deform a transparent elastomeric lens axially. Polydimethylsiloxane (PDMS) was selected as the optical lens material. The precise linear motion of the CYUSM dynamically controls its surface curvature. This enables continuous adjustment of the focal length. We optimized the structural parameters of the CYUSM stator and the PDMS lens using ANSYS finite element analysis. This optimization aimed to achieve modal frequency degeneracy and high electromechanical coupling efficiency. Experimental characterization of the prototype demonstrated that the CYUSM could deliver a maximum output velocity of 1.21 mm/s and a thrust force of 5.4 N (under 43.3 kHz, 200 Vp). The optical performance was evaluated using ZEMAX. The results indicated a minimum focal length of 36.5 mm for the lens module. The experimentally measured focal length trend showed high consistency with the simulation results, thereby validating the design accuracy. The module employs a coaxial hollow structure to integrate the actuator and optical path, resulting in high integration, miniaturization, self-locking, and electromagnetic interference immunity.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"160 ","pages":"Article 107911"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145616184","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

Ultrasonics Pub Date : 2026-04-01 Epub Date: 2025-11-15 DOI: 10.1016/j.ultras.2025.107887

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

{"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":"2026-04-01","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

On the existence of local defect resonance in ultrasonic guided waves interaction with horizontal defects in plates 超声导波与板内水平缺陷相互作用时存在局部缺陷共振

IF 4.1 2区物理与天体物理

Ultrasonics Pub Date : 2026-04-01 Epub Date: 2025-11-25 DOI: 10.1016/j.ultras.2025.107912

Mingyue Zhang , Sandrine Tahina Rakotonarivo , Antonino Spada , Margherita Capriotti

{"title":"On the existence of local defect resonance in ultrasonic guided waves interaction with horizontal defects in plates","authors":"Mingyue Zhang , Sandrine Tahina Rakotonarivo , Antonino Spada , Margherita Capriotti","doi":"10.1016/j.ultras.2025.107912","DOIUrl":"10.1016/j.ultras.2025.107912","url":null,"abstract":"<div><div>The interaction of ultrasonic guided waves with defected structures gives rise to local defect resonance (LDR), which manifests in large displacements in the vicinity of the defect and affects the reflection and transmission spectra. This paper investigates the fundamental mechanism at the origin of the LDR phenomenon in isotropic elastic plates, using a hybrid computational method (Global–Local). The analyses show that the coupling of ultrasonic guided waves with the vibrational resonance modes of the sub-structure, geometrically defined by the defect, causes LDR, and boundary conditions affect it secondarily. The coupling mechanism is captured by the Global–Local method and is investigated in relation to the characteristics of the defect and the relationship to the host-structure. The coupling occurs at defect lengths that are odd multiples of the modes’ quarter wavelengths. Comparisons with analytical, finite element and methods in literature for the computation of the natural and LDR frequencies are provided. The presence of LDR and its effect on broadband reflection and transmission ultrasonic spectra away from the defected region are also verified experimentally and can be used for remote defect characterization in NDE applications. These studies clarify the fundamental understanding of LDR and provide an effective approach to capture and predict LDR in ultrasonic guided wave propagation in plate-like structures.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"160 ","pages":"Article 107912"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145616185","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 pulse-echo sound speed estimation approach with prior constraints for layered media 层状介质中具有先验约束的脉冲回波声速估计方法

IF 4.1 2区物理与天体物理

Ultrasonics Pub Date : 2026-04-01 Epub Date: 2025-11-07 DOI: 10.1016/j.ultras.2025.107871

Nuomin Zhang , Yang Xiao , Yiyin Su , Xuanhao Wang , Xudong Yang , Junhui Shi

{"title":"A pulse-echo sound speed estimation approach with prior constraints for layered media","authors":"Nuomin Zhang , Yang Xiao , Yiyin Su , Xuanhao Wang , Xudong Yang , Junhui Shi","doi":"10.1016/j.ultras.2025.107871","DOIUrl":"10.1016/j.ultras.2025.107871","url":null,"abstract":"<div><div>This paper presents a pulse-echo sound speed estimation method for layered media, utilizing prior-constrained coherent analysis. The proposed method addresses the instability in local sound speed estimation caused by phase ambiguities resulting from suboptimal probe configurations. By introducing biologically reasonable sound speed boundary constraints to compensate for errors in average sound speed (ASS) estimation, and integrating sparse interface regularization inversion models, this method suppresses noise amplification during inversion, thereby enhancing robustness. The experimental results demonstrate that using this method significantly improves performance in simulations and in vitro data, reducing the root-mean-square error (RMSE) by 68% compared to existing methods. In in vivo experiments, the average sound speed in the tested regions deviated less than 0.6% from the reference values, while maintaining high repeatability. Furthermore, ablation studies validate the synergistic effect of prior compensation and sparse regularization, confirming their effectiveness in reducing phase sensitivity and enhancing the resolution of stratified structures. This method provides a reliable quantitative sound speed assessment tool for clinical scenarios such as hepatic steatosis, simultaneously relaxing hardware requirements for ultrasound probe parameters.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"160 ","pages":"Article 107871"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145616186","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

System for controlled mechanical therapies of the brain 控制大脑机械疗法的系统。

IF 4.1 2区物理与天体物理

Ultrasonics Pub Date : 2026-04-01 Epub Date: 2025-11-29 DOI: 10.1016/j.ultras.2025.107896

Eli Finlinson, Matt Snyder, Tom Riis, Jan Kubanek

{"title":"System for controlled mechanical therapies of the brain","authors":"Eli Finlinson, Matt Snyder, Tom Riis, Jan Kubanek","doi":"10.1016/j.ultras.2025.107896","DOIUrl":"10.1016/j.ultras.2025.107896","url":null,"abstract":"<div><div>Transcranial focused ultrasound enables remote targeted therapies that were previously only possible using surgical approaches. Mechanical therapies are particularly attractive due to their confined action and the elimination of the potentially harmful tissue and skull heating. However, systems for controlled mechanical therapies of the brain have been missing. Here, we have developed a prototype of such a system. The system operates at a relatively low frequency of 325 kHz (bandwidth 270–380 kHz) to accentuate mechanical effects and minimize the shift of the focal point, field distortion, and acoustic attenuation. We evaluated the transcranial performance of the system through 21 <em>ex-vivo</em> human skulls. There was a favorably low shift of the focal point (mean of 1.2 mm; 2.6 mm max), a minimal increase in focal volume (mean increase of 18%), and moderate attenuation of the pressure field (average 67% pressure attenuation). These values were achieved without phase correction. These results demonstrate that systems operating at a relatively low frequency are less prone to the aberrations of ultrasound by the skull, and provide a prototype that has the potential to be used for combined neuromodulation and mechanical therapies. However, translation to clinical high-intensity applications will require further validation, including <em>in-vivo</em> thermometry and safety testing.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"160 ","pages":"Article 107896"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145669860","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

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

Ultrasonics Pub Date : 2026-04-01 Epub Date: 2025-11-13 DOI: 10.1016/j.ultras.2025.107891

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

{"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":"2026-04-01","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

Experimental observations of ultrasonic waves reflecting from and passing through a crack 超声波从裂缝反射和穿过裂缝的实验观察。

IF 4.1 2区物理与天体物理

Ultrasonics Pub Date : 2026-04-01 Epub Date: 2025-11-19 DOI: 10.1016/j.ultras.2025.107898

Masahiro Suetsugu , Kaori Shirakihara , Minoru Tamiaki , Kouichi Sekino

引用次数: 0

Minimal angular compounding required for coherence-based sound speed estimation with plane wave ultrasound imaging 平面波超声成像相干声速估计所需的最小角复合。

IF 4.1 2区物理与天体物理

Ultrasonics Pub Date : 2026-04-01 Epub Date: 2025-12-01 DOI: 10.1016/j.ultras.2025.107915

Mawia Khairalseed , Jiaxin Zhang , Muyinatu A. Lediju Bell

{"title":"Minimal angular compounding required for coherence-based sound speed estimation with plane wave ultrasound imaging","authors":"Mawia Khairalseed , Jiaxin Zhang , Muyinatu A. Lediju Bell","doi":"10.1016/j.ultras.2025.107915","DOIUrl":"10.1016/j.ultras.2025.107915","url":null,"abstract":"<div><div>Conventional ultrasound beamforming assumes a uniform sound speed of 1540 m/s, which neglects tissue heterogeneity and results in phase aberrations and image degradation. Our recently introduced coherence-based sound speed estimation approach overcomes this limitation by assessing the short-lag spatial coherence within a coherent region of interest and selecting the sound speed that maximizes coherence, initially demonstrated after compounding images from 75 steered plane wave angles. However, using fewer angles will reduce required processing times. This study investigates the minimum number of steered angles necessary to implement our coherence-based sound speed estimation approach. In experiments with tissue-mimicking phantoms, a minimum of three steered plane wave angles was necessary to produce a similar full width at half maximum (FWHM) to that obtained with 75 angles, representing FWHM improvements of 67.19% over a sound speed of 1540 m/s and 65.31% over a speckle brightness maximization method. <em>In vivo</em> testing on the brachioradialis muscle demonstrated that the coherence-based method achieved a mean amplitude artifact reduction of 4.73 dB when compared to the same region in an image produced with a sound speed of 1540 m/s, using three angles in both cases. Overall, a minimum of 3–7 angles can be employed to estimate sound speeds using our coherence-based approach for plane wave images. Results have the potential to improve ultrasound imaging workflows and enhance diagnostic accuracy in clinical practice.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"160 ","pages":"Article 107915"},"PeriodicalIF":4.1,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145769269","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