Sensors and Actuators A-physical最新文献_第8页

A highly sensitive multi-DOF soft bionic finger using clams-inspired rigid-soft hybrid joints 一个高灵敏度的多自由度软仿生手指，使用蛤启发的刚软混合关节

IF 4.9 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical

Pub Date : 2026-04-01 Epub Date: 2026-01-24 DOI: 10.1016/j.sna.2026.117525

Zhipeng Wei , Houping Wu , Chenchen Li , Yulian Peng , Yingao Xu , Yufeng Wang , Seonggun Joe , Hongbo Wang

The human hand is endowed with unparalleled capacities for object manipulation and tactile perception of the external environment. In this work, we propose a Perceptive Bionic Finger (PBF), which consists of three vacuum-driven clam-inspired rigid-soft hybrid joints, connected with rigid phalanges. The PBF is capable of a maximum bending angle of 135°, with two actively controlled degrees of freedom (DOFs) and one passive DOF. The biomimetic design of the hybrid joints overcomes the drawbacks of low stiffness associated with silicone-rubber-based soft fingers. Magnetic induction-based split angle sensing films are seamlessly integrated into the two rigid plates of each hybrid joint, enabling the detection of bending angle changes as small as 0.1°. The high-resolution proprioceptive hybrid joint enables the PBF to be aware of its precise shape (bending angle) in real-time, regardless of whether the bending is caused by active drive or by passive deformation. By detecting subtle passive deformation, the PBF can recognize the surface textures and topography of a seashell as it slides across its surface, similar to how human fingers do. In addition, two PBFs are assembled on a frame to form a bionic gripper. As humans employ their thumb and index finger to perform a pinching action on an object, the two-PBF gripper is capable of discerning the object's dimensions during the grasping process, facilitated by real-time joint angle sensing. Moreover, we have demonstrated that the two-PBF gripper is capable of grasping various objects from a big plastic bottle, a cup, to a small pen and a peanut.

人类的手被赋予了无与伦比的物体操纵和外部环境触觉感知能力。在这项工作中，我们提出了一个感知仿生手指（PBF），它由三个真空驱动的蛤蜊启发的刚软混合关节组成，与刚性指骨相连。PBF的最大弯曲角度为135°，具有两个主动控制自由度（DOF）和一个被动控制自由度。混合关节的仿生设计克服了硅橡胶软指刚度低的缺点。基于磁感应的分角传感膜无缝集成到每个混合接头的两个刚性板中，可以检测小至0.1°的弯曲角度变化。高分辨率的本体感觉混合关节使PBF能够实时感知其精确形状（弯曲角度），无论弯曲是由主动驱动还是被动变形引起的。通过检测细微的被动变形，PBF可以识别贝壳在其表面滑动时的表面纹理和地形，类似于人类手指的方式。此外，两个pbf组装在一个框架上，形成一个仿生夹具。当人类使用拇指和食指在物体上执行捏取动作时，双pbf夹具能够在抓取过程中识别物体的尺寸，并通过实时关节角度传感提供便利。此外，我们已经证明了双pbf夹具能够抓取各种物体，从大塑料瓶，杯子，到小笔和花生。

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引用次数: 0

Investigation on parallel-sensing properties of metal rubber under compression loading based on electrical resistance change 基于电阻变化的压缩载荷下金属橡胶并联传感性能研究

IF 4.9 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical

Pub Date : 2026-04-01 Epub Date: 2026-01-22 DOI: 10.1016/j.sna.2026.117496

Chen Chen , Zesen Yuan , Yang Liu , Suchao Li , Wensong Zhou

Metal rubber (MR) is widely employed in structural vibration control and impact mitigation. A macroscopic electromechanical model of MR is derived in this study to investigate its parallel-sensing capability along with the original mechanical properties. The mechanical and electrical behavior of MR are first investigated using uniaxial compression and cyclic loading tests. The observed correlations between electrical resistance and mechanical responses are then applied to develop a macroscale electromechanical model of MR and propose methods for the identification of MR resistance, force, and displacement. Finally, the feasibility of using the electromechanical model to realize the parallel-sensing of MR is verified and evaluated. The results indicate that the electrical resistance of MR decreases with increasing wire diameter and nominal density, but increases with specimen thickness. Moreover, specimens with higher nominal density exhibit a more extensive overlap in their electrical resistance–displacement curves during cyclic loading. The proposed electromechanical model exhibits high accuracy in electrical resistance identification and shows greater sensitivity and accuracy for force identification at small displacements than large displacements, with displacement identification accuracy decreasing slightly after loading/unloading inflection points. The proposed method for realizing the parallel-sensing of MR holistically demonstrated high resolution and accuracy under low-frequency vibrations, though sensitivity diminishes for high‑frequency, small‑amplitude vibrations.

金属橡胶在结构振动控制和减震中得到了广泛的应用。本文建立了磁流变体的宏观机电模型，考察了磁流变体的并行传感能力和原有的力学性能。首先通过单轴压缩和循环加载试验研究了MR的机械和电气性能。观察到的电阻和机械响应之间的相关性，然后应用于开发磁流变的宏观机电模型，并提出识别磁流变阻力、力和位移的方法。最后，对利用机电模型实现磁流变并联传感的可行性进行了验证和评价。结果表明：磁流变电阻随线径和标称密度的增大而减小，随试样厚度的增大而增大；此外，较高标称密度的试件在循环加载过程中电阻-位移曲线的重叠范围更广。所提出的机电模型在电阻识别方面具有较高的准确性，在小位移处的力识别灵敏度和精度高于大位移处，在加载/卸载拐点后位移识别精度略有下降。该方法在低频振动下整体显示出较高的分辨率和精度，但在高频、小振幅振动下灵敏度会降低。

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引用次数: 0

Multi-field tuning of photocurrents in single phase multiferroic BLFCT thin films 单相多铁BLFCT薄膜中光电流的多场调谐

IF 4.9 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical

Pub Date : 2026-04-01 Epub Date: 2026-01-15 DOI: 10.1016/j.sna.2026.117507

Ji Luo, Peng Zhou, Yuxiong Cao, Tianjin Zhang, Jinzhao Wang, Yajun Qi

Multiferroic materials, exhibiting both ferroelectric and ferromagnetic order, have garnered significant interest for optoelectronic applications. Ferroelectricity provides spontaneous polarization and photoresponse capabilities, while ferromagnetism introduces magneto-optical coupling effects, giving these materials distinct advantages in multifunctional device design. This study investigates the manipulation of photocurrent via multiple fields (electric and magnetic) in single phase multiferroic Bi₄LaFe_0.7Co_0.3Ti₃O₁₅ (BLFCT) thin films towards self-powered ultraviolet photodetector. High-quality multiferroic BLFCT thin films were fabricated on Nb:SrTiO₃ (NSTO) substrates using pulsed laser deposition, forming Pt/BLFCT/NSTO heterojunctions. Under 365 nm ultraviolet illumination, the device exhibited significant self-powered characteristics, achieving a zero-bias photocurrent density of 39.354 μA/cm² and an on/off ratio exceeding 450. Moreover, the photocurrent could be further enhanced by up to 20 % through the application of a magnetic field, demonstrating the multi-field tunability of the device. Further investigations revealed that the switchable ferroelectric polarization modulates the strength of the effective internal electric field, which dominates the separation and transportation of the photocarriers. Moreover, the magnetostrictive effect and the magnetoelectric coupling-induced ferroelectric polarization promote the separation and transport of photogenerated carriers, thereby enhancing the overall photoresponse performance. This work establishes a promising strategy for employing multiferroic materials in low-power-consumption UV detection applications.

多铁性材料，同时表现出铁电和铁磁有序，已经引起了光电应用的极大兴趣。铁电性提供自发极化和光响应能力，而铁磁性引入磁光耦合效应，使这些材料在多功能器件设计中具有明显的优势。本研究研究了在单相多铁Bi4LaFe0.7Co0.3Ti3O15 （BLFCT）薄膜中，通过多个场（电场和磁场）对自供电紫外光电探测器的光电流操纵。采用脉冲激光沉积技术在Nb:SrTiO3 （NSTO）衬底上制备了高质量的多铁BLFCT薄膜，形成了Pt/BLFCT/NSTO异质结。在365 nm紫外光照射下，器件表现出明显的自供电特性，零偏置光电流密度达到39.354 μA/cm²，通断比超过450。此外，通过施加磁场，光电流可以进一步增强高达20% %，证明了该器件的多场可调性。进一步的研究表明，铁电极化可调节有效内电场的强度，控制着光载流子的分离和输运。此外，磁致伸缩效应和磁电耦合诱导的铁电极化促进了光生载流子的分离和输运，从而提高了整体光响应性能。这项工作为在低功耗紫外检测应用中使用多铁性材料建立了一个有前途的策略。

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引用次数: 0

Smart nanoprobes in diabetes management: Emerging role of carbon quantum dots in diagnosis and therapy 智能纳米探针在糖尿病管理：碳量子点在诊断和治疗中的新兴作用

IF 4.9 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical

Pub Date : 2026-04-01 Epub Date: 2026-01-12 DOI: 10.1016/j.sna.2026.117490

Basila A.K. , Desu Gayathri Niharika , CS Krishna Murthy , K.Sandeep Raju , Punam Salaria , Amarendar Reddy M.

Insulin, a peptide hormone crucial for glucose homeostasis, is produced by the beta cells of the pancreatic islets of Langerhans. An imbalance in glucose metabolism can lead to diabetes mellitus, a chronic metabolic disorder. This imbalance can result from insufficient production or the body’s inability to effectively use the insulin it produces because of structural abnormalities or cellular resistance. The prevalence of diabetes is steadily increasing worldwide. Early and accurate detection of diabetes is crucial for effective treatment, prevention, and symptom management. In this discussion, we highlight the significance of Carbon Quantum Dots (CQDs), carbon-based nanoparticles (typically < 10 nm), in diabetes detection and their potential role in therapeutic applications for diabetes-related complications. We also explore various synthesis methods of CQDs, their characterization techniques, and different CQD-based sensors, along with their underlying detection mechanisms.

胰岛素是一种对葡萄糖稳态至关重要的肽激素，由朗格汉斯胰岛的β细胞产生。葡萄糖代谢失衡可导致糖尿病，这是一种慢性代谢紊乱。这种不平衡可能是由于结构异常或细胞抵抗导致胰岛素分泌不足或身体无法有效利用其产生的胰岛素。糖尿病的患病率在世界范围内稳步上升。糖尿病的早期和准确检测对于有效的治疗、预防和症状管理至关重要。在本讨论中，我们强调了碳量子点（CQDs），碳基纳米颗粒（通常为10 nm）在糖尿病检测中的重要性及其在糖尿病相关并发症治疗应用中的潜在作用。我们还探讨了cqd的各种合成方法、表征技术和不同的cqd传感器，以及它们的潜在检测机制。

引用次数: 0

Design, fabrication and testing of MEMS based piezoresistive force sensor for human-machine interaction system in biomedical applications 生物医学人机交互系统中基于MEMS压阻式力传感器的设计、制造和测试

IF 4.9 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical

Pub Date : 2026-04-01 Epub Date: 2026-02-05 DOI: 10.1016/j.sna.2026.117566

R.S Divya , Ankur Verma , C.K Subash , K.J Suja , Lintu Rajan

The emergence of Human-Machine Interaction (HMI) technologies has been significantly impacted the biomedical field, as these have enabled intelligent, adaptable, and interactive communication between humans and medical instruments. This work presents the design, manufacturing and testing of a MEMS-based piezoresistive force sensor, designed for biomedical systems applications. The proposed sensor features a compact spiral structure with 1.5 mm × 1.5 mm in total dimensions and includes a 1 mm × 1 mm diaphragm that incorporates an Archimedean spiral piezoresistive structure in a Wheatstone bridge format to improve sensitivity and linearity. Static characterization resulted in a full-scale output of 180.10 mV with a sensitivity of 62.11 mV/N when a load was applied and 61.06 mV/N during unloading. Sensor exhibits a maximum hysteresis of 1.71 % FSS, nonlinearity of –2.04 % FSS and repeatability of 0.53 % FSS. Dynamic tests performed for normal forces ranging from 0.15 N to 0.5 N over ten loading cycles showed minimal deviation (<1 %), indicating high stability and repeatability. The sensor has a fast transient response, as 90 % of the peak output was achieved in milliseconds, and it exhibits very high sensitivity, compactness, and reliability. The results confirm that the developed sensor is a viable candidate for real-time force measurements in biomedical and robotic HMI systems. Future work will explore polymer-based spiral structures to further enhance sensor performance for flexible and wearable electronics.

人机交互（HMI）技术的出现对生物医学领域产生了重大影响，因为这些技术使人与医疗器械之间的智能，适应性和交互式通信成为可能。本工作介绍了一种基于mems的压阻式力传感器的设计、制造和测试，该传感器专为生物医学系统应用而设计。该传感器具有紧凑的螺旋结构，总尺寸为1.5 mm × 1.5 mm，包括1 mm × 1 mm的膜片，该膜片采用惠斯通电桥格式的阿基米德螺旋压阻结构，以提高灵敏度和线性度。静态特性导致满量程输出180.10 mV，加载时灵敏度为62.11 mV/N，卸载时灵敏度为61.06 mV/N。传感器的最大迟滞为1.71 % FSS，非线性为-2.04 % FSS，重复性为0.53 % FSS。在10个加载周期内，法向力范围从0.15 N到0.5 N进行的动态测试显示最小偏差（<1 %），表明高稳定性和可重复性。该传感器具有快速的瞬态响应，因为90% %的峰值输出在毫秒内实现，并且它具有非常高的灵敏度，紧凑性和可靠性。结果证实，所开发的传感器是生物医学和机器人人机交互系统中实时力测量的可行候选。未来的工作将探索基于聚合物的螺旋结构，以进一步提高柔性和可穿戴电子产品的传感器性能。

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引用次数: 0

High aspect ratio through-wafer etching of AT-cut quartz using double-sided offset apertures 高纵横比通过晶圆蚀刻at切割石英使用双面偏移孔径

IF 4.9 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical

Pub Date : 2026-04-01 Epub Date: 2026-01-30 DOI: 10.1016/j.sna.2026.117541

Kaiwen Chen , Chunyan Yin , Fangmeng Xu, Guangbin Dou

High-aspect-ratio (AR) structures remain challenging to achieve in quartz wet etching, particularly on AT-cut wafers. This study introduces a novel double-sided offset mask design method to enhance the AR of through-wafer structures. A conventional wet etching process was conducted on a 100 µm-thick AT-cut quartz wafer using both aligned and offset double-sided masks. The results show that offset masks achieved an AR of 0.630, a 39 % improvement over aligned masks (AR = 0.452), confirming the effectiveness of the proposed design. Furthermore, a formula is proposed to predict the minimum offset required for successful through-wafer etching. The proposed method proves effective in quartz MEMS fabrication, facilitating the miniaturization of quartz MEMS devices.

高纵横比（AR）结构在石英湿法蚀刻中仍然具有挑战性，特别是在at切割晶圆上。本研究提出一种新的双面偏置掩模设计方法，以提高通晶片结构的AR。在100 μ m厚的AT-cut石英晶圆上使用对准和偏移双面掩模进行了传统的湿法蚀刻工艺。结果表明，偏移掩模的AR值为0.630，比对齐掩模（AR = 0.452）提高了39 %，证实了所提出设计的有效性。此外，还提出了一个公式来预测成功通过晶圆刻蚀所需的最小偏移量。该方法在石英MEMS制造中被证明是有效的，促进了石英MEMS器件的小型化。

引用次数: 0

Design and practical evaluation of a dual-band dispersion-engineered metamaterial sensor for sensing applications 用于传感应用的双波段色散工程超材料传感器的设计与实用评估

IF 4.9 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical

Pub Date : 2026-04-01 Epub Date: 2026-01-22 DOI: 10.1016/j.sna.2026.117515

Md. Zikrul Bari Chowdhury , Mohammad Tariqul Islam , Mohamad A. Alawad , Mohamed Ouda , Abdulmajeed M. Alenezi

Juice adulteration, such as the addition of saccharine for profit, is a growing concern in food safety. Traditional methods for detecting such adulteration are often time-consuming, costly, and require specialized equipment. To address these limitations, this paper introduces the design, development, and experimental validation of a dispersion-engineered metamaterial-based sensor specifically focusing on the detection of juice adulteration. The proposed sensor offers a simple and efficient alternative to traditional methods, with a compact design measuring 13 × 13 mm², the sensor operates across dual frequency bands, resonating at 3 GHz and 4.95 GHz, exhibiting excellent transmission coefficients (S₂₁). The lower S-band resonance provides an optional communication mode, while the higher C-band resonance is dedicated to liquid-adulteration sensing in juice. The sensor demonstrates a high Q-factor of 95.40, with notable sensitivity. To ensure its accuracy, the sensor's performance was validated both numerically and experimentally. The S-parameters were verified using Advanced Design System (ADS) simulations, showing excellent agreement between the theoretical and practical results. Finally, this work is suitable for wireless communication and provides an efficient method for detecting adulterated juice without the need for complex laboratory procedures.

果汁掺假，如添加糖精牟利，是食品安全日益关注的问题。检测此类掺假的传统方法通常耗时、昂贵，并且需要专门的设备。为了解决这些限制，本文介绍了一种分散工程超材料传感器的设计、开发和实验验证，专门用于检测果汁掺假。该传感器为传统方法提供了一种简单而高效的替代方案，其紧凑的设计尺寸为13 × 13 mm²，传感器工作在双频段，共振频率为3 GHz和4.95 GHz，具有优异的传输系数（S21）。较低的s波段共振提供可选的通信模式，而较高的c波段共振专用于果汁中的液体掺假传感。该传感器具有95.40的高q因子，灵敏度显著。为了保证传感器的精度，对传感器的性能进行了数值和实验验证。利用先进设计系统（ADS）仿真验证了s参数，理论结果与实际结果吻合良好。最后，这项工作适用于无线通信，并提供了一种检测掺假果汁的有效方法，而无需复杂的实验室程序。

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引用次数: 0

Flexible nanocarbon hybrid laser-induced graphene electrodes for electrochemical Point-of-Care enzymatic urea detection 用于电化学即时酶解尿素检测的柔性纳米碳混合激光诱导石墨烯电极

IF 4.9 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical

Pub Date : 2026-04-01 Epub Date: 2026-01-27 DOI: 10.1016/j.sna.2026.117532

Sanjeet Kumar , Khairunnisa Amreen , Satish Kumar Dubey , Sanket Goel

The development of rapid, sensitive, and selective biosensors for urea detection is critical for advancing clinical diagnostics and renal health monitoring. In this study, a novel enzymatic urea sensor was developed using laser-induced graphene (LIG) electrodes, strategically functionalized with multi-walled carbon nanotubes (MWCNTs) to significantly enhance electrochemical performance. Comprehensive morphological and surface chemical characterizations using SEM, EDX, and XPS confirmed successful MWCNT integration, yielding a highly conductive, porous interface optimized for enzyme immobilization. Electrochemical analyses revealed pronounced improvements in electron transfer kinetics and catalytic efficiency upon urease immobilization, enabling robust detection of urea across a physiologically relevant concentration range (100 – 4000 µM) with a low detection limit and limit of quantification as 21.65 µM and 65.61 µM. Exceptional selectivity against common interferents was achieved, along with excellent repeatability, reproducibility, and operational stability, with over 90 % activity retained after prolonged storage. These results highlight the promise of MWCNT-enhanced LIG platforms as high-performance, mediator-assisted electrochemical bio-interfaces for urea detection, providing a foundation for future development of portable and point-of-care diagnostic system.

开发快速、灵敏、选择性的尿素检测生物传感器对于推进临床诊断和肾脏健康监测至关重要。在这项研究中，开发了一种新型的酶促尿素传感器，该传感器使用激光诱导石墨烯（LIG）电极，并采用多壁碳纳米管（MWCNTs）进行战略性功能化，以显着提高电化学性能。利用SEM、EDX和XPS对MWCNT进行了全面的形态和表面化学表征，证实了MWCNT的成功整合，产生了一个高导电性、多孔的界面，用于酶固定。电化学分析显示，脲酶固定化后的电子传递动力学和催化效率显著提高，能够在生理相关浓度范围内（100 - 4000 µM）检测尿素，检测限低，定量限为21.65 µM和65.61 µM。对常见干扰物具有优异的选择性，同时具有优异的重复性、再现性和操作稳定性，长时间储存后活性保持在90% %以上。这些结果突出了mwcnt增强LIG平台作为尿素检测的高性能、介质辅助电化学生物界面的前景，为未来便携式和即时诊断系统的发展奠定了基础。

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引用次数: 0

Vibration characteristics of hemispherical shell resonators with coaxial error 含同轴误差的半球形壳体谐振腔振动特性

IF 4.9 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical

Pub Date : 2026-04-01 Epub Date: 2026-01-23 DOI: 10.1016/j.sna.2026.117506

Longkai Zheng , Shurui Wen , Fengming Li

Coaxial error of hemispherical shell resonators (HSRs) is commonly caused by machining, which can significantly influence the frequency splitting and the symmetry of mode shapes of the HSRs, ultimately affecting the performance of the resonators. This study aims to analyze the influences of coaxial error on the frequency splitting and mode shapes of the HSRs using both analytical and experimental techniques. The coaxial error is quantitatively characterized by establishing the relationship between the deviation distance e₁ and the center angle φ_a of the HSR. The analytical model of the HSR with coaxial error is established by applying Hamilton’s principle, and the vibration characteristics are conveniently analyzed. Taking into account the mass impact of the acceleration sensors, the natural frequencies, frequency splitting values, and mode shapes are obtained and compared by using the established analytical model, the finite element method (FEM) and the experimental tests, from which the accuracy of the established analytical model is also verified. The effects of the deviation distance on the vibration properties of the HSR are discussed in detail. The key contributions of this paper are the establishment of the theoretical model and the design of the modal experiments for HSRs with coaxial error, which provide references for future researches in related fields.

半球壳谐振器的同轴误差通常是由加工引起的，它会严重影响半球壳谐振器的分频和模态振型的对称性，最终影响谐振器的性能。本研究旨在利用分析和实验两种方法分析同轴误差对高磁谐振器的分频和模态振型的影响。通过建立高铁偏心距离e1与圆心角φa之间的关系，定量表征了同轴误差。应用Hamilton原理建立了含同轴误差高铁的解析模型，便于分析其振动特性。在考虑加速度传感器质量冲击的情况下，通过建立的解析模型、有限元法和实验测试，得到了加速度传感器的固有频率、分频值和振型，并进行了比较，验证了所建立解析模型的准确性。详细讨论了偏差距离对高铁振动性能的影响。本文的主要贡献在于建立了含同轴误差高铁的理论模型和模态实验设计，为今后相关领域的研究提供了参考。

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引用次数: 0

Radiation-enhanced air-coupled Langevin transducer based on an acoustic black hole structure 基于声黑洞结构的辐射增强空气耦合朗格万换能器

IF 4.9 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

Sensors and Actuators A-physical

Pub Date : 2026-04-01 Epub Date: 2026-01-21 DOI: 10.1016/j.sna.2026.117500

Huiqin Chen , Yi Wang , Hao Jiang , Cheng Chen , Shuyu Lin

Traditional Langevin transducers (TLTs) are severely limited in airborne radiation efficiency due to a significant acoustic impedance mismatch with air. Furthermore, complex near-sound field results in fluctuating pressure distributions that hinder effective energy utilization. To address these limitations, we propose an acoustic black hole-integrated air-coupled Langevin transducer (ABHLT) for enhanced radiation and uniform axial sound field in the near-field region. Finite element method (FEM) simulations and experimental measurements confirm that the ABHLT generates significantly higher axial sound pressure and effectively suppresses spatial pressure fluctuations along the propagation axis in the near-field region. Compared to the TLT, the ABHLT demonstrates a 63 % increase in electroacoustic efficiency and a 62 % increase in total radiation power. These improvements stem from longitudinal-flexural mode conversion which collectively enhances acoustic matching, amplifies flexural vibration displacement, and accumulates mechanical energy. This structurally simple solution enables more effective near-field airborne applications of Langevin transducers, such as ultrasonic processing and drying.

传统的朗格万换能器（tlt）由于与空气的声阻抗不匹配，严重限制了机载辐射效率。此外，复杂的近声场导致压力分布波动，阻碍了能量的有效利用。为了解决这些限制，我们提出了一种声学黑洞集成空气耦合朗格万换能器（ABHLT），用于增强近场区域的辐射和均匀轴向声场。有限元模拟和实验测量结果证实，ABHLT在近场区域产生了明显较高的轴向声压，并有效抑制了沿传播轴方向的空间压力波动。与TLT相比，ABHLT的电声效率提高了63% %，总辐射功率提高了62% %。这些改进源于纵向-弯曲模式转换，它们共同增强了声学匹配，放大了弯曲振动位移，并积累了机械能。这种结构简单的解决方案使朗格万换能器更有效的近场机载应用，如超声波处理和干燥。

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引用次数: 0