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2019 IEEE SENSORS最新文献

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Flexible sweat sensors for non-invasive optimization of lithium dose in psychiatric disorders 柔性汗液传感器用于精神疾病锂剂量的无创优化
Pub Date : 2019-10-01 DOI: 10.1109/SENSORS43011.2019.8956598
F. Criscuolo, Filippo Cantù, I. Taurino, S. Carrara, G. Micheli
Lithium is the main drug in the prophylaxis of Bipolar Disorder (BD) as it acts as a mood stabilizer. However, due to its narrow therapeutic range, patients are obliged to frequent check-ups in hospital to control their lithium blood level and optimize the dose.In this paper, we propose for the first time a wearable electrochemical sensor for the non-invasive decentralized Therapeutic Drug Monitoring (TDM) of lithium in sweat. The system is made of a platinum potentiometric sensor with an electrochemically nanostructured solid-contact and a silver Reference Electrode (RE). The optimal coverage and successful nanostructuration of the working electrode, useful to significantly reduce drift, is confirmed by Scanning Electron Microscopy (SEM). The integrated flexible RE is chemically chlorinated and covered with a PVC membrane doped with an Ionic Liquid (IL) to improve its stability. The sensing system is then tested both in aqueous solution and in sweat, showing quasi-Nernstian slope (56.8±3.9 mV /decade) in the range of clinical interest.
锂是预防双相情感障碍(BD)的主要药物,因为它具有情绪稳定剂的作用。但由于其治疗范围窄,患者必须经常到医院检查,以控制其血锂水平并优化剂量。本文首次提出了一种可穿戴式电化学传感器,用于汗液中锂离子的无创分散治疗药物监测(TDM)。该系统由铂电位传感器与电化学纳米结构固体接触和银参比电极(RE)组成。扫描电镜(SEM)证实了工作电极的最佳覆盖范围和成功的纳米结构,有助于显著减少漂移。为了提高其稳定性,该集成柔性稀土材料被化学氯化,并覆盖一层掺杂离子液体(IL)的PVC膜。然后在水溶液和汗液中对传感系统进行测试,在临床感兴趣的范围内显示出准纳恩斯蒂斜率(56.8±3.9 mV / 10年)。
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引用次数: 11
Assessment of the Influence of Photodiode Size on RSS-Based Visible Light Positioning Precision 光电二极管尺寸对基于rss的可见光定位精度影响的评估
Pub Date : 2019-10-01 DOI: 10.1109/SENSORS43011.2019.8956543
Willem Raes, Sander Bastiaens, D. Plets, N. Stevens
This work discusses the influence of a photodiodes effective area size on the precision of received signal strength-based visible light positioning. It analyzes how two silicon-based photodiodes with different effective area perform as a receiver under varying illumination conditions. The two main findings are that it is not particularly needed to select a photodiode with a large surface area, despite the higher received signal strength, due to a higher noise contribution. On the other hand, the spread on the distance estimation is much smaller than 1 mm under standard illumination levels for the two photodiodes with a significantly different surface area, so that both photodiodes deliver enough precision.
本文讨论了光电二极管有效面积大小对基于接收信号强度的可见光定位精度的影响。分析了两个不同有效面积的硅基光电二极管在不同光照条件下作为接收器的性能。两个主要的发现是,它不是特别需要选择具有大表面积的光电二极管,尽管更高的接收信号强度,由于更高的噪声贡献。另一方面,对于两个具有明显不同表面积的光电二极管,在标准照明水平下,距离估计的扩散远小于1毫米,因此两个光电二极管都提供了足够的精度。
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引用次数: 0
Passive Proximity Detection Based on a Miniaturized Pyramidal Optical Sensor 基于小型锥体光学传感器的被动接近检测
Pub Date : 2019-10-01 DOI: 10.1109/SENSORS43011.2019.8956834
Ashis Rai, D. Zhuo, B. Bahreyni
In this paper, we present the design principle and experimental results from a fabricated prototype of an optical proximity sensor. The sensor base is a pyramid with light sensors attached to its sides and the top. The sensor estimates the direction and distance to the light source using ratios of light intensity received on the sides. We demonstrate that it is further possible to decompose a single pyramid into two virtual, off-center pyramids. Using the independently measured angles to the light sources from these two pyramids, it is possible to estimate the distance to the light source. Advantages of the presented approach to existing proximity sensors include: Passive operation, Low power consumption, Simple fabrication and Wide response angle. The device structure can be realized using standard microfabrication techniques, providing a straightforward path for mass-manufacturing and arraying such devices.
本文介绍了一种光学接近传感器的设计原理和实验结果。传感器底座是一个金字塔,光传感器连接在它的两侧和顶部。传感器使用侧面接收到的光强比率来估计光源的方向和距离。我们证明了将单个金字塔进一步分解为两个虚拟的、偏离中心的金字塔是可能的。利用这两个金字塔与光源的独立测量角度,可以估计到光源的距离。该方法与现有接近传感器相比具有无源工作、低功耗、制作简单、响应角宽等优点。该器件结构可以使用标准的微加工技术实现,为大规模制造和排列此类器件提供了一条简单的途径。
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引用次数: 2
Wireless stretchable SAW sensors based on Z-cut lithium niobate 基于z切割铌酸锂的无线可拉伸SAW传感器
Pub Date : 2019-10-01 DOI: 10.1109/SENSORS43011.2019.8956784
Cécile Floer, S. Hage-Ali, Louis Verzellesi, L. Badie, O. Elmazria, S. Zhgoon
Surface acoustic wave devices are increasingly used as sensors, especially because they can be batteryless, wireless and packageless. With these features they become particularly interesting in the field of flexible electronics for the monitoring of the human body parameters. By combining a thinned lithium niobate Z-cut substrate to ultrathin and stretchable antennas, a remote temperature measurement has been demonstrated. The addition of two protective layers to obtain a packageless structure seems promising to achieve wireless temperature measurements on the skin.
表面声波设备越来越多地被用作传感器,特别是因为它们可以无电池、无线和无封装。由于这些特点,它们在监测人体参数的柔性电子领域变得特别有趣。通过将薄铌酸锂z形切割衬底与超薄可拉伸天线相结合,演示了远程温度测量。增加两层保护层以获得无封装结构似乎有望实现皮肤上的无线温度测量。
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引用次数: 0
Evanescent field waveguide particle detector : Simulations concerning size and shape dependence 倏逝场波导粒子探测器:有关尺寸和形状依赖的模拟
Pub Date : 2019-10-01 DOI: 10.1109/SENSORS43011.2019.8956715
A. Tortschanoff, J. Pribošek, M. Baumgart, Anton Buchberger, A. Bergmann
Evanescent field particle scattering is a promising tool for single particle detection. Here we performed a detailed analysis to predict feasibility, potential and limitations of this sensing mechanism. First results from analytic estimations as well as 2D-simulations predict the feasibility of single particle detection but also a highly non-trivial dependence of the signals on size, shape and number of particles.
倏逝场粒子散射是一种很有前途的单粒子检测工具。在这里,我们进行了详细的分析,以预测这种传感机制的可行性,潜力和局限性。分析估计和2d模拟的第一个结果预测了单粒子检测的可行性,但也预测了信号对粒子大小、形状和数量的高度非平凡依赖。
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引用次数: 1
Salient Representation for Lung Sound Analysis Based on the JAMF Transform 基于JAMF变换的肺音分析显著表示
Pub Date : 2019-10-01 DOI: 10.1109/SENSORS43011.2019.8956546
Jonathan Cazaerck, E. Lauwers, Kris Ides, K. Hoorenbeeck, S. Verhulst, W. Daems, J. Steckel
Obstructive lung diseases are a family of diseases affecting the respiratory tract. By auscultation of the lungs, trained physicians can determine abnormal pathologies by listening to these lung sounds. When these lung sounds are recorded, the analysis can be performed by means of digital signal processing, often referred to as Computer-Aided Lung Sound Analysis (CALSA). The human hear is somewhat limited in it’s capabilities to detect and quantify small perceptual changes to the lung sound scene. The goal of CALSA is to be able to make objective conclusions on the state of the patient. In order to achieve this, the data recorded from the stethoscope must be transformed into a representation that allows efficient interpretation, either by a trained physician or a computer algorithm. In this paper, we propose the Joint Acoustic and Frequency Modulation representation as a useful tool for lung sound analysis, and illustrate the representation of various lung sounds in the transformed domain.
阻塞性肺疾病是影响呼吸道的一类疾病。通过肺部听诊,训练有素的医生可以通过听这些肺音来确定异常病理。当这些肺音被记录下来后,可以通过数字信号处理进行分析,通常被称为计算机辅助肺音分析(CALSA)。人类的听觉在检测和量化肺部声音场景的微小感知变化方面的能力是有限的。CALSA的目标是能够对患者的状态做出客观的结论。为了实现这一目标,从听诊器记录的数据必须转换成一种表示形式,以便由训练有素的医生或计算机算法进行有效的解释。在本文中,我们提出了联合声学和调频表示作为肺音分析的有用工具,并举例说明了变换域内各种肺音的表示。
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引用次数: 0
Ultrasensitive room-temperature chemical sensors by Ag-decorated ultraporous ZnO nanoparticle networks ag修饰的超多孔ZnO纳米粒子网络的超灵敏室温化学传感器
Pub Date : 2019-10-01 DOI: 10.1109/SENSORS43011.2019.8956926
Hongjun Chen, Renheng Bo, Lu Qi, A. Dodd, M. Saunders, T. White, T. Tsuzuki, A. Tricoli
Highly sensitive room temperature gas sensors consisting of ultraporous ZnO nanoparticle networks decorated with Ag nanoparticles (NPs) were fabricated by nanoparticle aerosol self-assembly and sequential sputtering. Optimization of the AgNPs loading and the thickness of ultraporous ZnO networks lead to a sensor response, defined as the ratio of resistance change, of 1.8 and 7.4 at 0.1 and 1 ppm ethanol concentrations, respectively, at room temperature under light irradiation. This is ~ 10 times higher than that of pure ultraporous ZnO film under the same experimental conditions. Furthermore, the optimal AgNPs-decorated ultraporous ZnO films can detect as low as 5 ppb of ethanol gas at room temperature under light illumination. The high sensitivity of AgNPs-decorated ZnO film can be ascribed to the synergistic effects of the ultraporous nanoparticle network morphology, AgNPs sensitization and light-assisted photo-excited gas-sensing process. These provide directions for the design of high sensitive metal-oxide semiconductor-based gas sensors capable to operate at room temperature.
采用纳米粒子气溶胶自组装和顺序溅射的方法,制备了由银纳米粒子修饰的超多孔ZnO纳米粒子网络组成的高灵敏度室温气体传感器。优化AgNPs负载和超多孔ZnO网络的厚度,在室温下光照下,当乙醇浓度为0.1 ppm和1 ppm时,传感器响应分别为1.8和7.4。在相同的实验条件下,这是纯超多孔ZnO薄膜的10倍以上。此外,最佳的agnps修饰的超多孔ZnO薄膜在光照下可以在室温下检测低至5 ppb的乙醇气体。AgNPs修饰ZnO薄膜的高灵敏度可归因于超多孔纳米颗粒网络形态、AgNPs敏化和光辅助光激发气敏工艺的协同作用。这为设计能够在室温下工作的高灵敏度金属氧化物半导体气体传感器提供了方向。
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引用次数: 0
AirleakSlam: Detection of Pressurized Air Leaks Using Passive Ultrasonic Sensors
Pub Date : 2019-10-01 DOI: 10.1109/SENSORS43011.2019.8956631
Anthony Schenck, W. Daems, J. Steckel
It is estimated that up to a third of the power consumption of compressed air networks is lost due to undetected leaks. Current methods of detecting and locating these air leaks involve manual labor using handheld devices that can detect the ultrasonic sound generated by the escaping air. In addition, the extra energy costs caused by the air leaks are concealed in the total cost of energy, reducing the sense of needing to find a solution. Therefore, there is limited commitment to actively detect and repair these air leaks. In order to address this issue, we propose a solution that requires no manual labor in the localization process, by fitting existing factory vehicles with an enclosure containing all the required sensors: a laser scanner for SLAM localization and an ultrasonic microphone array. By combining SLAM techniques with our ultrasonic microphone array on a robot, we are able to locate leaks in a large environment with high precision in 3D. By automating this process we aim to encourage the industry to proactively search for air leaks to reduce the amount of energy loss at a fraction of the cost of current methods.
据估计,压缩空气网络高达三分之一的电力消耗是由于未被发现的泄漏造成的。目前检测和定位这些空气泄漏的方法涉及使用手持设备的体力劳动,这些设备可以检测由逸出的空气产生的超声波。此外,由空气泄漏引起的额外能源成本隐藏在能源总成本中,减少了需要寻找解决方案的感觉。因此,积极检测和修复这些空气泄漏的承诺有限。为了解决这个问题,我们提出了一个在定位过程中不需要人工的解决方案,通过为现有的工厂车辆安装一个包含所有必要传感器的外壳:用于SLAM定位的激光扫描仪和超声波麦克风阵列。通过将SLAM技术与机器人上的超声波麦克风阵列相结合,我们能够在大环境中以高精度的3D方式定位泄漏。通过自动化这一过程,我们的目标是鼓励行业主动寻找空气泄漏,以减少能源损失,而成本只是当前方法的一小部分。
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引用次数: 1
Influence of sensor blockage on automotive LiDAR systems 传感器阻塞对汽车激光雷达系统的影响
Pub Date : 2019-10-01 DOI: 10.1109/SENSORS43011.2019.8956792
Manuel Trierweiler, Pedro Caldelas, Gabriel Gröninger, T. Peterseim, C. Neumann
Performance degradation of automotive LiDAR systems due to contamination of the sensor cover is a key problem for self-driving cars in harsh environments. Here the influence of standardized dust on the maximum range of a LiDAR sensor is investigated. Several samples were prepared for the study covering a transmission range from 65-94%. For each sample, several pointclouds at varying distances of a specified target were recorded and evaluated. The results exhibit a reduction of the sensor maximum range up to 75%.
在恶劣环境下,由于传感器罩的污染,汽车激光雷达系统的性能下降是自动驾驶汽车面临的一个关键问题。本文研究了标准化粉尘对激光雷达传感器最大探测距离的影响。为研究准备了几个样本,覆盖了65% -94%的传播范围。对于每个样本,记录并评估了在指定目标的不同距离上的几个点云。结果显示传感器的最大范围减少了75%。
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引用次数: 14
Miniature Acoustic Resonator for Enhanced Lab-on-a-Chip Electroanalysis 用于增强芯片实验室电分析的微型声学谐振器
Pub Date : 2019-10-01 DOI: 10.1109/SENSORS43011.2019.8956499
Xiaohe Wang, Pengfei Niu, Lei Zhao, Yuan Ning, Sheng Sun, Menglun Zhang, W. Pang
In lab-on-a-chip electroanalysis, the mass transfer of electroactive species towards the electrode surface limits the detection performance due to the difficulty in applying external convection. In this study, we proposed to integrate miniature acoustic resonator, fabricated by microelectrochemical system, within on-chip electroanalytical platform to improve electrochemical process. Gold film electrochemical sensor chip and acoustic resonator were assembled face-to-face with a polydimethylsiloxane chamber in between. Cyclic voltammetric (CV) responses of ferrocenemethanol were tested under actuation of miniature acoustic resonator at various powers. Resonator’s actuation results in sigmoidal CV curves and the diffusion limited current increases with the rise of applied power on resonator. The advantages of miniature acoustic resonator, including submillimeter small size, mass fabricability, low cost, low energy consumption, as well as outstanding performance towards enhancing electrochemical process, will strongly contribute to the development of highly-sensitive compact sono-electroanalytical devices.
在芯片实验室电分析中,由于难以施加外部对流,电活性物质向电极表面的传质限制了检测性能。在本研究中,我们提出将微电化学系统制造的微型声谐振器集成在片上电分析平台中,以改善电化学过程。金膜电化学传感器芯片与声学谐振器面对面组装,中间有聚二甲基硅氧烷腔。在不同功率的微型声谐振器驱动下,测试了二茂铁乙醇的循环伏安响应。谐振器的驱动产生s型CV曲线,扩散极限电流随谐振器功率的增大而增大。微型声谐振器具有亚毫米级小尺寸、可批量制造、低成本、低能耗以及在增强电化学过程方面的突出性能等优点,将有力地促进高灵敏度小型化声电分析器件的发展。
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引用次数: 1
期刊
2019 IEEE SENSORS
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