Ultrasonics最新文献_第7页

Inertial Cavitation-based Release Estimation - ICbRE 基于惯性空化的释放估计

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-12-06 DOI: 10.1016/j.ultras.2025.107897

Benedikt George , Ula Savšek , Jan Helmerich , Georg Fischer , Dagmar Fischer , Stefan J. Rupitsch

Cancer research increasingly focuses on local drug release in tumorous tissue by using drug carriers. Concurrently, techniques to quantify the associated drug release are under investigation. This study presents a Inertial Cavitation-based Release Estimation (ICbRE) method. The estimation is based on the assessment of inertial cavitation (IC) noise and its correlation to release data. To develop ICbRE, we used poly(lactic-co-glycolic acid) (PLGA) nanocapsules loaded with a fluorescent dye, which were flowed through a tissue-mimicking phantom, and exposed them to focused ultrasound bursts at 550–950 kHz with peak rarefaction pressures (PRP) of 0.22–1.85 MPa, corresponding to mechanical index (MI) values of 0.3–1.9. Cavitation activity was recorded using a passive cavitation detection (PCD) system. By training on acoustic data, we derived weight functions, interpreted as transfer functions, to solve this inverse problem. These weight functions were multiplied by a test set of the acoustic data to estimate payload release. The most accurate estimation showed an absolute error of 0.3% and a standard deviation of 1.9% from the nominal value. Given its precision, we propose the integration of ICbRE into focused ultrasound systems to estimate drug carriers’ payload release. In the course of prospective cancer treatments, a drug’s released payload may be simultaneously quantified while monitoring the cavitation noise to ensure an effective therapy.

肿瘤研究越来越关注利用药物载体在肿瘤组织中局部释放药物。同时，量化相关药物释放的技术正在研究中。提出了一种基于惯性空化的释放估计（ICbRE）方法。该估计是基于对惯性空化（IC）噪声及其与释放数据相关性的评估。为了开发ICbRE，我们使用装载荧光染料的聚乳酸-羟基乙酸（PLGA）纳米胶囊，将其通过组织模拟模体，并将其暴露于550-950 kHz的聚焦超声爆发中，峰值雾化压力（PRP）为0.22-1.85 MPa，对应的机械指数（MI）值为0.3-1.9。采用被动空化检测（PCD）系统记录空化活动。通过对声学数据的训练，我们推导了权函数，解释为传递函数，以解决这个逆问题。这些权重函数乘以一组声学数据来估计有效载荷释放。最准确的估计与标称值的绝对误差为0.3%，标准差为1.9%。鉴于其精度，我们建议将ICbRE集成到聚焦超声系统中，以估计药物载体的有效载荷释放。在前瞻性的癌症治疗过程中，可以在监测空化噪声的同时量化药物释放的有效载荷，以确保有效的治疗。

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引用次数: 0

Acoustical particle conveyors via Bessel-beam superposition 贝塞尔光束叠加的声学粒子传送带

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-12-05 DOI: 10.1016/j.ultras.2025.107918

Jianrong Shi , Xuemei Ren , Yubo Shi , Boyuan Tang , Zheng Xu , Xiaojun Liu

We proposed an on-axis, multi-bottle beam by superposing two coaxial acoustic Bessel beams to produce acoustical particle conveyors. The spatial acoustic pressure distribution and source phase, determined solely by lateral wavenumber

k_{r}

and the radius of the circular source, were derived to establish a theoretical basis for precise ultrasound field control. These conveyors exploit strong-gradient acoustic radiation forces at acoustic bottles, enabling stable trapping of micrometer-scale Rayleigh particles in free space. By fine-tuning the incident acoustic frequency, our acoustic tweezers can trap, push, and pull multiple particles along the propagation axis. We discussed the optimization of

k_{r}

-dependent phase lens, focusing on the selection of

k_{r}

values and the number of simultaneously emitting Bessel beams, which improves field observation and enhances trapping stability. The system employs only a single acoustic source and a phase lens, offering potential for cell manipulation and targeted medical treatments in vivo.

我们提出了一种轴上多瓶光束，通过叠加两个同轴声贝塞尔光束来产生声学粒子输送机。推导了仅由横向波数kr和圆形声源半径决定的空间声压分布和声源相位，为超声场的精确控制奠定了理论基础。这些传送带利用声瓶上的强梯度声辐射力，在自由空间中稳定捕获微米尺度的瑞利粒子。通过微调入射声波频率，我们的声镊可以沿着传播轴捕获、推动和拉动多个粒子。我们讨论了依赖于kr的相位透镜的优化，重点是kr值的选择和同时发射贝塞尔光束的数量，以改善现场观测和提高捕获稳定性。该系统仅采用单一声源和相位透镜，为细胞操作和体内靶向医学治疗提供了潜力。

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引用次数: 0

Tool wear mechanism in ultrasonic-assisted grinding of SiCf/SiC composites 超声辅助磨削SiCf/SiC复合材料刀具磨损机理

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-12-05 DOI: 10.1016/j.ultras.2025.107920

Haiqi Sun, Zhigang Dong, Feng Yang, Yan Bao, Renke Kang, Jiansong Sun

Under severe cooling conditions, machining SiC_f/SiC composites leads to pronounced tool wear, compromising machining efficiency. While ultrasonic-assisted grinding (UAG) demonstrates potential for enhancing surface quality, the wear characteristics of grinding tools in this process remain insufficiently characterized. This study employs tribological and kinematic analysis coupled with experimental verification to elucidate wear mechanisms. Results identify four principal wear modes: abrasive wear, fracture wear, grain detachment, and wheel clogging, involving both two-body and three-body wear. High-frequency ultrasonic vibrations induce surface microfracture of abrasive particles while sinusoidal scratch patterns form on the bond. Ultrasonic vibration substantially reduces debris adhesion, minimizing wheel clogging and extending tool life, thereby enhancing grinding performance. These findings facilitate parameter optimization for UAG in high-performance ceramic matrix composites.

在恶劣的冷却条件下，加工SiCf/SiC复合材料会导致明显的刀具磨损，从而影响加工效率。虽然超声辅助磨削（UAG）显示出提高表面质量的潜力，但在此过程中磨削工具的磨损特性仍然没有得到充分的表征。本研究采用摩擦学和运动学分析结合实验验证来阐明磨损机理。研究结果确定了磨粒磨损、断裂磨损、颗粒脱落和车轮堵塞四种主要磨损模式，包括两体磨损和三体磨损。高频超声振动诱发磨粒表面微断裂，同时在粘结层上形成正弦划痕。超声波振动大大减少了碎屑附着，减少了砂轮堵塞，延长了刀具寿命，从而提高了磨削性能。这些发现有助于高性能陶瓷基复合材料中UAG的参数优化。

引用次数: 0

Bubble rising dynamics in a transverse ultrasonic standing wave field: Role of acoustic-induced viscous dissipation 超声横驻波场中气泡上升动力学：声致粘滞耗散的作用

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-12-04 DOI: 10.1016/j.ultras.2025.107899

Zeyang Xu , Yuao Chai , Liqiang Ma , Chao Deng , Yiyi Huo , Yiding Zhu

The dynamics of rising bubbles in water under a transversely oriented ultrasonic standing wave field was experimentally investigated. The acoustic field distribution was characterized using scanning focused laser differential interferometry (SFLDI). The bubbles’ trajectories were captured by high-speed imaging, from which velocities and accelerations were calculated. High-magnification particle image velocimetry (PIV) was employed to examine the surrounding flow field in detail. Results showed that bubbles in the presence of ultrasound (BPU) exhibited a 25%–56% velocity reduction compared to bubbles in the absence of ultrasound (BAU). Released from the tank bottom, BPU were immediately drawn by the transverse Bjerknes force and ascended along the nodal region of the standing waves. As BPU accelerated, they experienced a significant quasi-periodical deceleration–acceleration motion. PIV analysis revealed that this phenomenon was strongly correlated with increased boundary layer shear and enhanced vortex shedding, resulting in severe viscous dissipation induced by the acoustic field. These findings provided new insights for bubble manipulation in ultrasonic-assisted chemical engineering, mineral processing, and biomedical applications.

实验研究了横定向超声驻波场作用下水中气泡上升的动力学特性。采用扫描聚焦激光微分干涉法（SFLDI）对声场分布进行了表征。高速成像捕捉到了气泡的轨迹，并由此计算出速度和加速度。采用高倍粒子图像测速技术（PIV）对周围的流场进行了详细的检测。结果表明，超声存在下的气泡（BPU）比无超声存在下的气泡（BAU）速度降低25%-56%。从槽底释放出来后，BPU立即被横向比耶克内斯力牵引，沿驻波节点区域上升。随着BPU加速，它们经历了显著的准周期性减速-加速运动。PIV分析表明，这一现象与边界层剪切增加和旋涡脱落增强密切相关，导致声场引起严重的粘性耗散。这些发现为超声辅助化学工程、矿物加工和生物医学应用中的气泡操纵提供了新的见解。

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引用次数: 0

Sparse spatial-partition probabilistic imaging method for debonding evaluation of composite wing leading edge using ultrasonic guided wave 超声导波复合材料机翼前缘剥离评估的稀疏空间分割概率成像方法。

IF 4.1 2区物理与天体物理 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-12-04 DOI: 10.1016/j.ultras.2025.107917

Yuxi Zhang , Qi Wu , Hanqi Zhang , Wulin Lan

The composite wing leading edge (CWLE) is a critical component that determines the aerodynamic characteristics of airplanes operating in harsh environments. A large CWLE, composed of multiple material layers in a curved, sandwiched structure with varying thicknesses, is prone to debonding during both manufacturing and service. Conventional ultrasonic C-scans using bulk waves require extensive time for offline testing, making it essential to develop an efficient debonding evaluation method suitable for CWLE. This study implemented a pair of PZT arrays, functioning as excitation and reception arrays, in a section of CWLE at equal intervals to create sparse regions. A novel sparse spatial-partition probabilistic imaging method was proposed to localize debonding based on changes in ultrasonic guided waves, offering advantages of speed, baseline-free operation, and multi-feature fusion. Performance disparities among PZTs due to manufacturing and installation were addressed through comparison and compensation. The damage index of the guided wave was calculated by combining amplitude and arrival time, and the weight distribution of the sensing path, with different shape factors, was multiplied by the damage index to determine the regional probability. After determining the region with the highest probability, the probabilities on the paths between the PZT within this region and its opposing PZTs were given more weights, ultimately yielding a probability image that clearly pinpoints the debonding location. The debonding results were validated through CT scanning with a localization error of 5.02 mm. A comparison with conventional guided wave-based localization methods demonstrates that the proposed method achieves superior damage localization accuracy while maintaining equally high efficiency. The method is also validated under different measurement areas within a larger scale CWLE, showing the similar root mean square errors as that from the small scale CWLE. It suggests that the proposed method offers an efficient and accurate approach to debonding evaluation in complex material structures such as CWLE.

复合材料机翼前缘（CWLE）是决定恶劣环境下飞机气动特性的关键部件。大型CWLE由不同厚度的弯曲夹层结构中的多个材料层组成，在制造和使用过程中都容易脱落。使用体波的常规超声c扫描需要大量的离线测试时间，因此开发一种适用于CWLE的高效脱粘评估方法至关重要。本研究在CWLE的一段中以等间隔实现一对PZT阵列，作为激励和接收阵列，以创建稀疏区域。提出了一种基于超声导波变化的稀疏空间分割概率成像方法，该方法具有快速、无基线、多特征融合等优点。通过比较和补偿，解决了由于制造和安装造成的pzt性能差异。结合幅值和到达时间计算导波的损伤指数，并将不同形状因子的感应路径权重分布乘以损伤指数，确定区域概率。在确定概率最高的区域后，对该区域内PZT与其对立PZT之间的路径上的概率赋予更多权重，最终得到一个明确确定脱粘位置的概率图像。通过CT扫描验证脱粘结果，定位误差为5.02 mm。与传统导波定位方法的比较表明，该方法在保持较高的定位效率的同时，具有较高的损伤定位精度。在更大规模CWLE的不同测量区域下对该方法进行了验证，结果表明该方法与小规模CWLE的均方根误差相似。结果表明，该方法为复杂材料结构（如CWLE）的脱粘评估提供了一种高效、准确的方法。

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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 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-12-03 DOI: 10.1016/j.ultras.2025.107916

Mahshid Hafezi , Yuchen Liu , Andrew Feeney

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.

在功率超声中，朗格万超声换能器已广泛应用于医疗和工业应用，包括骨手术、食物切割和空化产生。用于这些应用的换能器通常被调谐到基本工作模式，通常是第一纵向，以便与目标材料或结构进行最佳相互作用。目前，人们对具有可调谐动态特性（包括共振频率）的超声设备越来越感兴趣，以优化这些应用中的性能。为了克服当前结构有限的频率调谐能力，本研究展示了一种采用形状记忆合金镍钛诺作为末端质量设计和制造的朗格万传感器。其基本原理是，这些末端质量的弹性特性随温度的变化将引起换能器基本共振频率的变化，从而证明了一种可行的和新颖的方法来控制共振频率。用激光多普勒振动仪表征了室温下的第一和第三纵向模态，与有限元分析结果密切相关。然后在不同的环境温度下进行谐波分析，以显示两种模态的共振频率和振动幅值随温度的变化。镍钛诺朗格万换能器（NLT）的可调谐共振依赖于镍钛诺马氏体相变引起的热机械性能的变化，这可以通过结构设计因素来证明。换能器在30°C和100°C之间，L1和L3模式的最大谐振频率分别增加15%和10%以上。这项研究使新一代的朗格万超声波换能器能够使用先进的材料制造，用于多频率和可调谐共振应用。

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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 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-12-01 DOI: 10.1016/j.ultras.2025.107915

Mawia Khairalseed , Jiaxin Zhang , Muyinatu A. Lediju Bell

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. In vivo 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.

传统的超声波束形成假设声速为1540 m/s，忽略了组织的非均匀性，导致相位像差和图像退化。我们最近推出的基于相干的声速估计方法克服了这一限制，通过评估感兴趣的相干区域内的短滞后空间相干性，并选择最大相干性的声速，最初是在合成来自75个定向平面波角的图像后证明的。然而，使用更少的角度将减少所需的处理时间。本研究探讨了实现我们基于相干的声速估计方法所需的最小转向角数。在模拟组织的实验中，最少需要3个操纵平面波角才能产生与75个角度时相似的半最大全宽（FWHM），这表明在声速1540 m/s时，FWHM提高了67.19%，比散斑亮度最大化方法提高了65.31%。在肱桡肌上进行的体内测试表明，与声速1540 m/s产生的图像的相同区域相比，在两种情况下使用三个角度，基于相干的方法实现了4.73 dB的平均伪振幅减少。总的来说，使用我们基于相干的平面波图像方法，至少可以使用3-7个角度来估计声速。结果有可能改善超声成像工作流程，提高临床实践中的诊断准确性。

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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 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-29 DOI: 10.1016/j.ultras.2025.107896

Eli Finlinson, Matt Snyder, Tom Riis, Jan Kubanek

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 ex-vivo 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 in-vivo thermometry and safety testing.

经颅聚焦超声使远程靶向治疗成为可能，以前只能使用手术方法。机械疗法特别有吸引力，因为它们的作用有限，消除了潜在的有害组织和颅骨加热。然而，控制大脑机械疗法的系统一直缺失。在这里，我们已经开发了这样一个系统的原型。该系统在325 kHz（带宽270-380 kHz）的相对较低频率下工作，以突出机械效应，并最大限度地减少焦点移位、场失真和声衰减。我们通过21个离体人头骨评估了该系统的经颅性能。焦点位移较低（平均1.2 mm，最大2.6 mm），焦点体积增加较小（平均增加18%），压力场衰减适中（平均压力衰减67%）。这些值是在没有相位校正的情况下获得的。这些结果表明，在相对较低的频率下工作的系统不太容易受到头骨超声畸变的影响，并提供了一个有潜力用于联合神经调节和机械治疗的原型。然而，转化为临床高强度应用将需要进一步验证，包括体内温度测量和安全性测试。

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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 Q1 ACOUSTICS

Ultrasonics

Pub Date : 2025-11-25 DOI: 10.1016/j.ultras.2025.107912

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

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.

超声导波与缺陷结构的相互作用会产生局部缺陷共振（LDR），这种共振在缺陷附近表现为较大的位移，并影响反射和透射光谱。本文采用一种混合计算方法（全局-局部）研究了各向同性弹性板中LDR现象产生的基本机理。分析表明，超声导波与由缺陷几何定义的子结构的振动共振模态的耦合是导致LDR的主要原因，边界条件是影响LDR的次要因素。采用全局-局部方法捕获了耦合机制，并结合缺陷的特征和与主体结构的关系进行了研究。耦合发生在缺陷长度为模式四分之一波长的奇数倍处。并与解析法、有限元法和文献中计算固有频率和LDR频率的方法进行了比较。LDR的存在及其对远离缺陷区域的宽带反射和透射超声光谱的影响也得到了实验验证，并可用于无损检测应用中的远程缺陷表征。这些研究阐明了对LDR的基本认识，并为捕获和预测超声导波在片状结构中传播的LDR提供了有效的方法。

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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 Q1 ACOUSTICS

Ultrasonics

Pub 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

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.

传统变焦镜头采用多个固体透镜元件和电磁驱动机构。这导致了复杂的结构和大尺寸。这些限制极大地限制了它们在小型化至关重要的紧凑型光学系统中的应用。为了解决这一问题，本文提出了一种柔性变焦镜头模块。该模块由圆柱形超声电机（CYUSM）驱动。CYUSM由定子、空心动器和压电陶瓷（PZT）元件组成。它作为一个直接驱动驱动器，使透明弹性透镜轴向变形。选用聚二甲基硅氧烷（PDMS）作为光学透镜材料。CYUSM的精确线性运动动态控制其表面曲率。这样可以连续调整焦距。利用ANSYS有限元分析对CYUSM定子和PDMS透镜的结构参数进行了优化。该优化旨在实现模态频率退化和高机电耦合效率。实验表征表明，CYUSM的最大输出速度为1.21 mm/s，推力为5.4 N （43.3 kHz, 200 Vp）。利用ZEMAX对其光学性能进行了评价。结果表明，最小焦距为36.5毫米的透镜模块。实验测量的焦距趋势与仿真结果具有较高的一致性，从而验证了设计的准确性。该模块采用同轴空心结构，将致动器和光路集成在一起，具有高集成度、小型化、自锁、抗电磁干扰等特点。

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引用次数: 0