Sensors International最新文献

Biomimetic multi-sensing behavior through co-operative actuation of electrochemical macromolecular motors in conducting polymers: Results from PEDOT/PVA interpenetrated films 导电聚合物中协同驱动电化学大分子马达的仿生多传感行为：PEDOT/PVA互渗透膜的结果

Sensors International

Pub Date : 2026-01-01 DOI: 10.1016/j.sintl.2026.100373

Lijin Rajan , Toribio F. Otero , Sivakrishna Prakash , Seema Ansari , Yahya A. Ismail

In this study, we present a comprehensive experimental investigation and theoretical description of the sensing capabilities of the electrochemical reactions of PEDOT/PVA interpenetrated film responding to the electrical, chemical, and thermal ambient conditions. The reaction drives reversible conformational movements or cooperative actuation of the PEDOT chains (the macromolecular electrochemical motors) mimicking biological functionalities that has been explored by few. The PEDOT/PVA hybrid film serves as a model material to simulate the cooperative actuation of sarcomeres in muscles. The consumed reaction energy under cyclic voltametric experimental conditions respond to and sense the ambient conditions: electrical (potential scan rate), chemical (electrolyte concentration) and thermal (temperature). Here, only two connecting wires are required to communicate both the command (current) and sensing signals (charge or energy) between the computer (brain) and the film (muscle). In other words, no additional sensors or connecting wires are required. Based on the reaction rate equation, a theoretical description consistent with the experimental results was developed. If these findings are translated to natural muscles and biological systems, they suggest that at any time the reaction energy in functional cells (such as the sarcomeres in muscles) could generate mechanical, chemical, thermal, and neuronal sensing signals to inform the brain during actuation. This remains an open biological question.

在这项研究中，我们对PEDOT/PVA互穿膜的电化学反应对电、化学和热环境条件的响应能力进行了全面的实验研究和理论描述。该反应驱动可逆构象运动或PEDOT链（大分子电化学马达）的协同驱动，模仿生物功能，很少有人探索。PEDOT/PVA混合膜作为模拟肌肉肌节协同驱动的模型材料。循环伏安实验条件下消耗的反应能响应和感知环境条件：电（电位扫描速率）、化学（电解质浓度）和热（温度）。在这里，只需要两根连接线就可以在计算机（大脑）和胶片（肌肉）之间传递指令（电流）和传感信号（电荷或能量）。换句话说，不需要额外的传感器或连接线。根据反应速率方程，建立了与实验结果一致的理论描述。如果这些发现被转化为自然肌肉和生物系统，他们表明，在任何时候，功能细胞（如肌肉中的肌节）的反应能量都可以产生机械、化学、热和神经元传感信号，在驱动过程中通知大脑。这仍然是一个悬而未决的生物学问题。

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引用次数: 0

Toward neuromorphic pain sensors: Full-Spectrum artificial nociception via analog-switching memristors with tunable volatility 神经形态痛觉器：全谱人工痛觉，通过模拟开关忆阻器，具有可调的波动性

Sensors International

Pub Date : 2026-01-01 DOI: 10.1016/j.sintl.2026.100371

Ali Gadelmoula , Xuan Li , Baker Mohammad , Moh'd Rezeq , Wesley Cantwell , Lianxi Zheng

Neuromorphic computing systems could greatly benefit from electronic devices that exhibit analog resistive switching and dynamic adaptation similar to those of biological neurons, particularly for implementing sensory functions such as nociception. Here, we present a graphene oxide–cobalt oxide (GO–CoO) memristor that exhibits analog resistive switching with intrinsic current decay. Successive current–voltage sweeps with varying cutoff voltages demonstrate multilevel, finely tunable resistance states over a broad range without any compliance current. Charge–flux analysis confirms that the device operates as a true memristor, and cumulative conductance buildup under sequential positive and negative biases indicates robust, polarity-independent switching. Moreover, tuning the voltage sweep rate modulates the inertia of charge carriers that governs the switching kinetics. The GO–CoO architecture establishes a conductive network wherein oxygen vacancy dynamics within CoO particles and conductive rGO formation collectively govern analog resistive switching, providing the essential tunability and stability required to emulate synaptic plasticity. Under optimized pulsed stimulation, the memristor faithfully emulates key nociceptive neural responses, including a threshold response, peripheral sensitization (manifested as hyperalgesia and allodynia), central sensitization (temporal summation and facilitation), suprathreshold response, and post-stimulus recovery. The device also exhibits both short-term and long-term synaptic plasticity. These results pave the way for simple, cost-effective memristors capable of emulating neural synaptic functions and pain perception.

神经形态计算系统可以极大地受益于电子设备，这些设备表现出类似于生物神经元的模拟电阻开关和动态适应，特别是在实现感觉功能（如伤害感觉）方面。在这里，我们提出了一种氧化石墨烯-氧化钴（GO-CoO）忆阻器，它具有模拟电阻开关和固有电流衰减。具有不同截止电压的连续电流-电压扫描在宽范围内显示出多电平，精细可调的电阻状态，而没有任何遵从电流。电荷通量分析证实了该器件作为一个真正的忆阻器工作，并且在顺序正、负偏置下的累积电导积累表明了稳健的、与极性无关的开关。此外，调节电压扫描速率可以调节控制开关动力学的载流子的惯性。GO-CoO架构建立了一个导电网络，其中CoO粒子内的氧空位动力学和导电的rGO形成共同控制模拟电阻开关，提供模拟突触可塑性所需的基本可调性和稳定性。在优化的脉冲刺激下，忆阻器忠实地模拟关键的伤害性神经反应，包括阈值反应、外周敏化（表现为痛觉过敏和异常性痛觉）、中枢敏化（时间汇总和促进）、阈上反应和刺激后恢复。该装置还显示出短期和长期的突触可塑性。这些结果为能够模拟神经突触功能和疼痛感知的简单，经济高效的记忆电阻器铺平了道路。

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引用次数: 0

Selective detection of toxic Au3+ using novel dicyano-[5]helicene-based fluorescence sensor: Applications in real samples and human neuroblastoma cells 利用新型二矢亚诺-[5]螺旋烯荧光传感器选择性检测毒性Au3+：在真实样品和人类神经母细胞瘤细胞中的应用

Sensors International

Pub Date : 2026-01-01 DOI: 10.1016/j.sintl.2026.100372

Raveewan Kittiyaphong , Nirawit Kaewnok , Pramsak Patawanich , Pattarapapa Janthakit , Vinich Promarak , Anyanee Kamkaew , Pattanawit Swanglap , Jitnapa Sirirak , Natdhera Sanmanee , Krit Setthakarn , Nantanit Wanichacheva

Gold is a valuable noble metal having widespread applications across various fields. However, Au³⁺ accumulation in the human body and the environment can pose serious health and ecological risks. Therefore, effective methods for Au³⁺ detection must be developed. Herein, a fluorescence sensor was successfully synthesized, to the best of our knowledge, as the first dicyano-[5]helicene-based sensor (MP) for Au³⁺ detection. Spectroscopic techniques and single-crystal X-ray analysis were used to confirm the molecular structure and photophysical properties of MP. The sensor exhibited a large Stokes shift of 111 nm and a high fluorescence quantum yield. Upon exposure to Au³⁺ MP displayed a “turn-off” fluorescence response, which indicates its high selectivity toward Au³⁺ over other competing metal ions along with excellent sensitivity. The detection limit of MP reached 4.2 ppb, which is lower than the guideline value for Au³⁺ toxicity in freshwater environments. The sensing mechanism for Au³⁺ detection was proposed to rely on the alkynophilicity of Au³⁺, activating the triple bond and inducing hydration of the alkyne moiety. This mechanism was supported by Fourier transform infrared spectroscopy, ¹H nuclear magnetic resonance spectroscopy, high-resolution mass spectrometry, and molecular modeling. This sensor demonstrated high potential for qualitative fluorometric assays of Au³⁺ levels in diverse real samples, such as environmental water, drinking water, tap water, fertilizer solutions, cosmetic products, and human neuroblastoma cells. In addition, it could be applied for the quantitative detection of gold nanorods and further developed into a paper-based test strip for onsite Au³⁺ screening.

金是一种贵重的贵金属，在各个领域都有广泛的应用。然而，Au3+在人体和环境中的积累会造成严重的健康和生态风险。因此，必须开发有效的Au3+检测方法。本文成功合成了荧光传感器，据我们所知，这是第一个用于检测Au3+的基于二氨基[5]螺旋烯的传感器（MP）。利用光谱技术和单晶x射线分析证实了MP的分子结构和光物理性质。该传感器具有111 nm的大斯托克斯位移和高荧光量子产率。暴露于Au3+ MP后显示出“关闭”荧光响应，表明其对Au3+的选择性高于其他竞争金属离子，同时具有优异的灵敏度。MP的检出限为4.2 ppb，低于淡水环境中Au3+毒性指导值。提出了Au3+检测的传感机制是依靠Au3+的亲炔性，激活三键，诱导炔部分水化。傅里叶变换红外光谱、1H核磁共振光谱、高分辨率质谱和分子模型支持了这一机制。该传感器在各种实际样品（如环境水、饮用水、自来水、肥料溶液、化妆品和人类神经母细胞瘤细胞）中Au3+水平的定性荧光测定中表现出很高的潜力。此外，它还可以应用于金纳米棒的定量检测，并进一步发展成为用于现场Au3+筛选的纸质测试条。

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引用次数: 0

A simple V-shaped microdevice for high-performance, wide-range vacuum and multifunctional sensing applications 一个简单的v形微器件，用于高性能，宽范围真空和多功能传感应用

Sensors International

Pub Date : 2025-12-04 DOI: 10.1016/j.sintl.2025.100370

Mohamed Hemid, Hamid Nawaz, Nouha Alcheikh

This study presents a V-shaped microelectromechanical systems (MEMS) device designed to harness mode localization and nonlinear dynamic effects for high-performance pressure and/or multifunctional sensing. Three V-shaped devices with different geometric configurations were fabricated and tested to evaluate their pressure-sensing performance and anti-crossing behavior under pressure. The latter is particularly beneficial for sensing applications, as it ensures the device remains unaffected by pressure variations, eliminating the need for an additional packaging system. By exploiting mode coupling between the frequencies of symmetric and anti-symmetric modes, the sensors exhibited significant frequency and amplitude shifts across a pressure range of 0.1–760 Torr. One device demonstrated a sensitivity of up to 508.4 ppm/Torr near ambient pressure, while another achieved an ultra-high sensitivity of 7460 ppm/Torr in the medium-vacuum range and 1205.4 ppm/Torr in the low-vacuum range, showcasing excellent sensitivity and linearity. The third device showed a robustness against pressure variations, with one mode selectively insensitive to pressure but responsive to other stimuli, enabling multimodal sensing capabilities. Moreover, the device has been tested under temperature environmental variation, showing a low sensitivity of 20.4 ppm/⁰C. Comparative analysis with existing MEMS pressure sensors underscores the proposed design's advantages in structural simplicity, compact size, and high sensitivity, particularly in low-vacuum environments, positioning it as a promising solution for advanced sensing applications in biomedical, environmental, and industrial domains.

本研究提出了一种v形微机电系统（MEMS）器件，旨在利用模式定位和非线性动态效应来实现高性能压力和/或多功能传感。制作了三种不同几何形状的v形装置，并对其进行了压敏性能和抗压过交性能测试。后者对于传感应用特别有益，因为它确保设备不受压力变化的影响，从而消除了对额外包装系统的需要。通过利用对称和反对称模式频率之间的模式耦合，传感器在0.1-760 Torr的压力范围内表现出显著的频率和幅度变化。其中一种器件在环境压力下的灵敏度高达508.4 ppm/Torr，而另一种器件在中真空范围内达到7460 ppm/Torr的超高灵敏度，在低真空范围内达到1205.4 ppm/Torr，具有出色的灵敏度和线性度。第三种装置显示出对压力变化的鲁棒性，其中一种模式对压力不敏感，但对其他刺激有反应，从而实现了多模态传感能力。此外，该装置已在温度环境变化下进行了测试，显示出20.4 ppm/0C的低灵敏度。与现有MEMS压力传感器的比较分析强调了所提出的设计在结构简单，尺寸紧凑和灵敏度高方面的优势，特别是在低真空环境中，将其定位为生物医学，环境和工业领域先进传感应用的有前途的解决方案。

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引用次数: 0

The role of chemisorption and physisorption in Fe-doped SnO2 acetone sensors 化学吸附和物理吸附在掺铁SnO2丙酮传感器中的作用

Sensors International

Pub Date : 2025-11-08 DOI: 10.1016/j.sintl.2025.100359

Yernar Shynybekov , Baktiyar Soltabayev , Almagul Mentbayeva , Amanzhol Turlybekuly

The gas sensing mechanism is one of the most important parameters of chemiresistive gas sensors, and distinguishing them opens the possibility of manipulating sensor performance. In this study, we introduced the concept of adsorption-type contribution to the gas-sensing performance that could further enhance the fundamental understanding of gas-sensing mechanisms and aid future sensor development. The proposed concept was applied for the examination of Fe-doped SnO₂ gas sensors ionic obtained through the successive layer adsorption and reaction (SILAR) method. The 0.5 mol.% Fe-doped SnO₂ sensor demonstrated a sensing response of 118 % to 25 ppm acetone at a relatively low optimal working temperature of 175 °C, and a temperature-induced p–n junction shift at around 50 °C. It had an LOD of approximately 250 ppb and a linear sensing range that extended to 25 ppm. Notably, the sensor had a response time of approximately 52 s and a recovery time of around 14 s. These results suggest the potential of Fe-doped SnO₂ sensors for acetone detection relevant to self-diagnosis and health monitoring.

气敏机理是化学电阻式气体传感器最重要的参数之一，研究其机理为控制传感器性能提供了可能。在本研究中，我们引入了吸附型对气敏性能贡献的概念，这可以进一步增强对气敏机制的基本理解，并有助于未来传感器的发展。将所提出的概念应用于通过连续层吸附反应（SILAR）法获得的掺铁SnO2气体传感器离子的检测。在相对较低的175℃的最佳工作温度下，掺铁量为0.5 mol.%的SnO2传感器对25 ppm丙酮的传感响应为118%，在50℃左右出现温度诱导的p-n结位移。它的LOD约为250 ppb，线性传感范围扩展到25 ppm。值得注意的是，传感器的响应时间约为52秒，恢复时间约为14秒。这些结果表明，铁掺杂SnO2传感器在丙酮检测方面具有与自我诊断和健康监测相关的潜力。

{"title":"The role of chemisorption and physisorption in Fe-doped SnO2 acetone sensors","authors":"Yernar Shynybekov , Baktiyar Soltabayev , Almagul Mentbayeva , Amanzhol Turlybekuly","doi":"10.1016/j.sintl.2025.100359","DOIUrl":"10.1016/j.sintl.2025.100359","url":null,"abstract":"<div><div>The gas sensing mechanism is one of the most important parameters of chemiresistive gas sensors, and distinguishing them opens the possibility of manipulating sensor performance. In this study, we introduced the concept of adsorption-type contribution to the gas-sensing performance that could further enhance the fundamental understanding of gas-sensing mechanisms and aid future sensor development. The proposed concept was applied for the examination of Fe-doped SnO<sub>2</sub> gas sensors ionic obtained through the successive layer adsorption and reaction (SILAR) method. The 0.5 mol.% Fe-doped SnO<sub>2</sub> sensor demonstrated a sensing response of 118 % to 25 ppm acetone at a relatively low optimal working temperature of 175 °C, and a temperature-induced p–n junction shift at around 50 °C. It had an LOD of approximately 250 ppb and a linear sensing range that extended to 25 ppm. Notably, the sensor had a response time of approximately 52 s and a recovery time of around 14 s. These results suggest the potential of Fe-doped SnO<sub>2</sub> sensors for acetone detection relevant to self-diagnosis and health monitoring.</div></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":"7 ","pages":"Article 100359"},"PeriodicalIF":0.0,"publicationDate":"2025-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145516510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The impact of cable length on the mobility performance of a remotely operated underwater vehicle (ROV) 电缆长度对遥控水下航行器（ROV）移动性能的影响

Sensors International

Pub Date : 2025-11-07 DOI: 10.1016/j.sintl.2025.100358

Sarawuth Srinakaew , Jenjira sukmanee , Ramil Kesvarakul

This study examines the impact of tether length on the mobility performance of a Remotely Operated Vehicle (ROV) in calm-water conditions. Field studies were executed at Laem Chabang Port, during which the ROV was utilized to navigate a 300-m trajectory while consistently documenting velocity and power usage. Results show that as the tether length increases, vehicle speed consistently decreases while power usage increases, indicating the effect of tether-induced hydrodynamic drag. Specifically, the velocity declined from 0.6706 m/s at the start to approximately 0.5500 m/s at 300 m, while power consumption rose from 0.7414 kW to around 0.778 kW. Linear regression was utilized to quantify these patterns, yielding two empirical models: V(x) = 0.6706−0.0003x and P(x) = 0.7414+(8 × 10−5)x, with x representing the tether length in meters. The models gave coefficients of determination of R² = 0.5834 and R² = 0.5965, respectively. This research presents one of the first empirical frameworks derived from in-field experimental trials to quantify performance degradation due to tether drag, thereby providing practical tools for energy budgeting and motion forecasting of stationary underwater vehicles in real-time operational planning. Unlike prior works relying mainly on simulations or analytical models, our study delivers regression-based predictive equations validated across different test sites. This contribution not only enhances operational readiness but also establishes a solid foundation for future investigations into nonlinear modeling and the development of adaptive control systems that incorporate tether dynamics to further improve predictive accuracy.

本研究考察了在平静水域条件下，系绳长度对远程操作车辆（ROV）移动性能的影响。在Laem Chabang港口进行了现场研究，在此期间，ROV被用于导航300米的轨迹，同时持续记录速度和功率使用情况。结果表明，随着系绳长度的增加，车辆的速度持续降低，而功率的使用则不断增加，这表明系绳引起的水动力阻力的影响。具体来说，速度从开始时的0.6706 m/s下降到300 m时的约0.5500 m/s，而功耗从0.7414 kW上升到0.778 kW左右。利用线性回归对这些模式进行量化，得到两个经验模型：V(x) = 0.6706−0.0003x和P(x) = 0.7414+(8 × 10−5)x，其中x以米为单位表示系绳长度。模型的决定系数分别为R2 = 0.5834和R2 = 0.5965。本研究提出了第一个从现场实验试验中得出的经验框架之一，用于量化系绳阻力导致的性能下降，从而为静止水下航行器在实时作战规划中的能量预算和运动预测提供实用工具。与以往主要依赖于模拟或分析模型的工作不同，我们的研究提供了基于回归的预测方程，并在不同的测试地点进行了验证。这一贡献不仅提高了作战准备，而且为未来非线性建模和自适应控制系统的研究奠定了坚实的基础，这些系统包括系绳动力学，以进一步提高预测精度。

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引用次数: 0

Simulation-driven dual-band Graphene–Silver terahertz metasurface biosensor integrated with machine learning for mode-resolved hemoglobin detection 模拟驱动的双波段石墨烯银太赫兹超表面生物传感器与机器学习集成，用于模式分辨血红蛋白检测

Sensors International

Pub Date : 2025-11-04 DOI: 10.1016/j.sintl.2025.100357

Gunasekaran Thangavel , V. Joseph Michael Jerard , K. Manivannan , A.N. Sasikumar , Vairaprakash Selvaraj , Manjunathan Alagarsamy

Accurate hemoglobin measurement is essential for diagnosing hematological disorders and monitoring cardiovascular health. This study introduces a terahertz metasurface biosensor combined with machine learning algorithms for rapid and non-invasive hemoglobin detection in clinical settings. The metasurface exhibits dual-band resonance in 2 THz regions, achieving a sensitivity of 450 GHz/RIU within a refractive index range of 1.34–1.43 RIU, with corresponding frequency shifts of 40 GHz and 30 GHz. Machine learning models, including Random Forest, Support Vector Machines, and Neural Networks, enhance the sensor's analytical capability. Across four clinical categories—normal, mild anemia, moderate anemia, and severe anemia—the models attain 96.5 percent classification accuracy, with recall and precision scores above 0.94. Ensemble learning reduces the root mean square error to 0.28 g/dL, while denoising methods increase the signal-to-noise ratio by 16.3 dB. The biosensor supports real-time analysis, requires minimal sample volume, and eliminates complex preparation, making it suitable for continuous hemoglobin monitoring and cardiovascular health management.

准确的血红蛋白测量对于诊断血液病和监测心血管健康至关重要。本研究介绍了一种结合机器学习算法的太赫兹超表面生物传感器，用于临床环境中的快速非侵入性血红蛋白检测。该超表面在2太赫兹区域呈现双频共振，在1.34-1.43 RIU的折射率范围内实现了450 GHz/RIU的灵敏度，相应的频移为40 GHz和30 GHz。机器学习模型，包括随机森林、支持向量机和神经网络，增强了传感器的分析能力。在四个临床类别中——正常、轻度贫血、中度贫血和严重贫血——该模型达到了96.5%的分类准确率，召回率和准确率得分高于0.94。集成学习将均方根误差降低到0.28 g/dL，而去噪方法将信噪比提高了16.3 dB。该生物传感器支持实时分析，需要最小的样本量，并消除了复杂的制备，使其适用于连续血红蛋白监测和心血管健康管理。

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引用次数: 0

Real-Time Fault Detection in Robotic Manufacturing Using High-Bandwidth Event Vision-Based Tactile Sensing 基于高带宽事件视觉触觉传感的机器人制造实时故障检测

Sensors International

Pub Date : 2025-11-01 DOI: 10.1016/j.sintl.2025.100355

Eslam Sherif , Akram Khairi , Hussain Sajwani , Abdullah Solayman , Abdallah Mohammad Alkilany , Ahmed Awadalla , Mohamad Halwani , Laith AbuAssi , Dewald Swart , Abdulla Ayyad , Yahya Zweiri

Early detection of machining faults is critical to avoid damage to high-value workpieces, prevent tool failure, and mitigate safety risks in automated manufacturing environments. While robotic automation has advanced across manufacturing, aerospace machining remains difficult to automate due to strict quality requirements and the lack of intelligent, real-time fault monitoring. During machining, skilled human operators rely on their tactile perception to detect subtle faults such as tool wear, misalignment, or insufficient feed force through vibration cues. Replicating this level of high-resolution tactile fidelity in robotic systems remains a key challenge. We present an event Vision-Based Tactile Sensor (EVBTS) that enables robots to perceive and interpret machining vibrations with a human-like sense of touch. The sensor uses an event camera to observe a deformable, marker-embedded membrane, capturing fine-grained spatiotemporal deformation patterns with microsecond latency. This high-fidelity, biomimetic signal stream allows robotic systems to detect faults in machining dynamics. We evaluate EVBTS on a robotic drilling setup for aerospace nutplate installation, spanning 12 distinct machining conditions. A lightweight convolutional neural network, integrated into a real-time pipeline with Exponential Moving Average (EMA) filtering, achieves 98.56% classification test accuracy, a 98.11% test F1 score, and

<

100 ms inference latency. This pipeline demonstrates closed-loop feedback, successfully halting faulty operations mid-process to prevent defects. These results demonstrate that EVBTS enables real-time, high-resolution fault detection and intervention, allowing for early correction, much like a skilled human operator, supporting safer, more precise, and autonomous manufacturing.

在自动化制造环境中，早期检测加工故障对于避免高价值工件的损坏、防止刀具故障和降低安全风险至关重要。虽然机器人自动化在整个制造业中取得了进步，但由于严格的质量要求和缺乏智能、实时故障监控，航空航天加工仍然难以实现自动化。在加工过程中，熟练的操作人员依靠他们的触觉感知来检测细微的故障，如刀具磨损、不对中或通过振动提示进给力不足。在机器人系统中复制这种高分辨率的触觉保真度仍然是一个关键的挑战。我们提出了一种基于事件视觉的触觉传感器（EVBTS），使机器人能够以类似人类的触觉感知和解释加工振动。该传感器使用事件相机来观察可变形的嵌入标记的膜，以微秒延迟捕捉细粒度的时空变形模式。这种高保真的仿生信号流允许机器人系统检测加工动力学中的故障。我们在航空航天nutplate安装的机器人钻孔装置上评估了EVBTS，跨越了12种不同的加工条件。将轻量级卷积神经网络集成到具有指数移动平均（EMA）滤波的实时管道中，实现了98.56%的分类测试准确率，98.11%的测试F1分数和100毫秒的推理延迟。该管道演示了闭环反馈，成功地在过程中停止错误操作以防止缺陷。这些结果表明，EVBTS可以实现实时，高分辨率的故障检测和干预，允许早期纠正，就像熟练的人工操作员一样，支持更安全，更精确和自主的制造。

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引用次数: 0

A novel system to record pulses, thrills, and bruit sounds generated by arteriovenous fistulas 一种记录动静脉瘘产生的脉冲、震颤和声音的新系统

Sensors International

Pub Date : 2025-10-31 DOI: 10.1016/j.sintl.2025.100356

Jessica Centracchio , Eliana Cinotti , Salvatore Parlato , Paolo Bifulco , Pasquale Zamboli , Rosalba Liguori , Giuseppe Longo , Massimo Punzi , Annalisa Liccardo , Francesco Bonavolontà , Giovanna Capolongo , Emilio Andreozzi

Arteriovenous fistulas (AVFs) are the preferred vascular accesses for hemodialysis and are made by anastomosing an artery and a vein. The arterial blood flowing into the anastomosed vein results in abnormal infrasonic and audible vibrations of venous walls, which produce tactile and audible sensations known as thrill and bruit sounds. Physical examination of AVFs is instrumental for early detection of stenoses, but it is operator-dependent. Several measurement systems have been proposed for quantitative analysis of bruit sounds, and only a few focused on thrill. However, none of these has demonstrated that the signals acquired correspond to the thrill and bruit sounds perceived by physicians.

This study presents, for the first time in literature, a novel AVF monitoring system that simultaneously records sphygmic pulses, thrills, and bruit sounds signals, also demonstrating that they share the same behaviors of tactile and audible sensations perceived by physicians. The proposed system is based on a small, non-invasive force sensor that captures both infrasonic and audible vibrations, and an ad hoc signal processing that accurately separates sphygmic pulses from thrills and bruit sounds. Experimental tests were carried out on 18 patients to assess two common behaviors observed during medical routine examinations. In particular, recordings were acquired on 3 measurement sites along the anastomosed vein, to verify the progressive amplitude reduction of thrill and bruit sounds from the anastomosis, and also their brisk amplitude reduction during vein occlusion tests. One-tailed Wilcoxon rank sum tests confirmed the expected amplitude reductions in both tests (p < 0.00001). In conclusion, the proposed AVF monitoring system accurately captures all vibrations produced by AVFs, which could be used to quantitatively evaluate the health status of patients and improve their surveillance.

动静脉瘘（AVFs）是血液透析首选的血管通道，由动脉和静脉吻合而成。流入吻合静脉的动脉血导致静脉壁产生异常的次声和可听振动，从而产生触觉和听觉感觉，即震颤声和杂音。avf的体格检查有助于早期发现狭窄，但这取决于操作者。已经提出了几种测量系统来定量分析物体的声音，但只有少数关注于刺激。然而，这些都没有证明所获得的信号与医生所感知到的兴奋和声音相对应。这项研究首次在文献中提出了一种新颖的AVF监测系统，该系统可以同时记录血压计、震颤和声音信号，并证明它们具有医生感知到的触觉和听觉的相同行为。该系统基于一个小型的、非侵入性的力传感器，可以捕获次声和可听振动，以及一个特殊的信号处理，可以准确地将脉搏从震颤和杂音中分离出来。对18例患者进行了实验测试，以评估医学常规检查中观察到的两种常见行为。特别地，我们在吻合静脉的3个测量点进行了记录，以验证吻合处的震颤音和bruit音的幅度逐渐降低，以及在静脉闭塞试验中它们的幅度急剧降低。单尾Wilcoxon秩和检验证实了两项检验的预期幅度降低（p < 0.00001）。综上所述，所提出的动静脉f监测系统能够准确捕获动静脉f产生的所有振动，可用于定量评估患者的健康状况，提高对患者的监测水平。

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引用次数: 0

A review on recent developments in materials and methodologies for metal oxide semiconductor liquefied petroleum gas sensors operating at room temperature 综述了室温下金属氧化物半导体液化气传感器材料和方法的最新进展

Sensors International

Pub Date : 2025-10-18 DOI: 10.1016/j.sintl.2025.100354

B.V. Sreenivasappa , A.R. Shashikala

In this paper, a review on recent developments in materials and methodologies for metal oxide semiconductor liquefied petroleum gas sensors operating at room temperature is presented. The goal of this review is to identify various types of gas sensors, LPG sensing materials, preparation and fabrication methods, characterization to study on the properties of the materials and analysis on parameters at room temperature. The review also investigates advanced hybrid nanostructured materials, elemental modifications and doping processes to improve LPG sensor performance. Surface reactivity of the sensing material could be accelerated by the use of appropriate catalyst. The morphology of a material can be improved by various methods, including changing the synthesis conditions, adding additives to alter the material properties and functionality by modifying its size, shape, and structure at the nanoscale. This review also emphasizes the role of suitable dopants in changing bandgap of the materials.

本文综述了室温下工作的金属氧化物半导体液化气传感器材料和方法的最新进展。本文综述了各种类型的气体传感器、液化石油气传感材料、制备和制造方法、表征、材料性能研究和室温参数分析。该综述还研究了先进的混合纳米结构材料、元素修饰和掺杂工艺，以提高LPG传感器的性能。使用合适的催化剂可以加速传感材料的表面反应性。材料的形态可以通过各种方法来改善，包括改变合成条件，添加添加剂来改变材料的性质和功能，通过在纳米尺度上改变其尺寸，形状和结构。本文还强调了合适的掺杂剂在改变材料带隙中的作用。

引用次数: 0