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2014 IEEE Sensors Applications Symposium (SAS)最新文献

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Standard Uncertainty estimation on polynomial regression models 多项式回归模型的标准不确定度估计
Pub Date : 2014-04-17 DOI: 10.1109/SAS.2014.6798947
Arvind Rajan, Y. Kuang, M. Ooi, S. Demidenko
Polynomial regression model is very important in the modeling and characterization of sensors. The uncertainty propagation through the polynomial nonlinearity can only be estimated through numerical simulation or linearization approximation according to the Guide to the expression of Uncertainty in Measurement. This paper developed a general cookbook style guide to derive the analytical expression of uncertainty propagating through the polynomial regression models. The proposed method can be easily incorporated into any computer algebra system for reliable and fast evaluation. Specific expressions are derived explicitly for some of the most commonly used low order polynomial regression models. The framework is applied to a few recently published sensor and measurement system models.
多项式回归模型在传感器的建模和表征中具有重要的意义。通过多项式非线性传播的不确定度只能根据《测量不确定度表达指南》通过数值模拟或线性化近似来估计。本文开发了一种通用的食谱式指南,用于推导通过多项式回归模型传播的不确定性的解析表达式。该方法可以方便地集成到任何计算机代数系统中,以实现可靠和快速的评估。对于一些最常用的低阶多项式回归模型,明确地导出了特定的表达式。该框架应用于最近发表的几个传感器和测量系统模型。
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引用次数: 4
Distributed detection in Neural Network based multihop Wireless Sensor Network 基于神经网络的多跳无线传感器网络分布式检测
Pub Date : 2014-04-17 DOI: 10.1109/SAS.2014.6798918
Jabal Raval, B. Jagyasi
In this paper, a Neural Network based data aggregation approach to detect the binary events in a multi-hop Wireless Sensor Network has been proposed. We envision every node in a network as a unit of neuron which gets trained by using the neural network based back propagation algorithm. As compared to the LMS based Adaptive Weighted Aggregation scheme for tree network, the proposed Neural Network based wireless sensor network approach leads to a significant improvement in detection accuracy without much energy losses due to communication and computation overhead. We also compare the detection accuracy of the proposed Neural Network based scheme with that of the non-adaptive Bayesian approach which requires apriori knowledge of the sensor's performance indices.
提出了一种基于神经网络的数据聚合方法来检测多跳无线传感器网络中的二进制事件。我们将网络中的每个节点都看作是一个神经元单元,通过基于神经网络的反向传播算法对其进行训练。与基于LMS的树状网络自适应加权聚合方案相比,本文提出的基于神经网络的无线传感器网络方法在不造成通信和计算开销的能量损失的情况下,显著提高了检测精度。我们还比较了所提出的基于神经网络的方案与需要先验了解传感器性能指标的非自适应贝叶斯方法的检测精度。
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引用次数: 8
Development of a frequency-shifted feedback fiber laser at 777.5 nm for range sensing applications 用于距离传感的777.5 nm频移反馈光纤激光器的研制
Pub Date : 2014-04-17 DOI: 10.1109/SAS.2014.6798911
M. Hofbauer, J. Seiter, H. Zimmermann
A frequency-shifted feedback (FSF) laser in combination with an interferometer is a very accurate range sensing tool. In this paper, an FSF fiber laser with an output spectrum in the 777.5 nm range is presented. The cavity of the laser works in the 1555 nm range, enabling the use of cheap standard telecom products. Since a wavelength of 1555 nm is not detectable with silicon semiconductor devices, the output of the laser is frequency-doubled by a periodically poled lithium niobate (PPLN) crystal, which shifts the output spectrum from 1555 nm to 777.5 nm. It could be shown that frequency doubling is a feasible way to shift the output spectrum of the laser to a range which is detectable by silicon, without destroying the special properties of the FSF laser.
频移反馈(FSF)激光器与干涉仪相结合是一种非常精确的距离传感工具。本文设计了一种输出光谱在777.5 nm范围内的FSF光纤激光器。激光器的腔体工作在1555nm范围内,可以使用便宜的标准电信产品。由于硅半导体器件无法检测到1555 nm的波长,因此通过周期性极化的铌酸锂(PPLN)晶体将输出光谱从1555 nm转移到777.5 nm,激光的输出频率增加了一倍。结果表明,在不破坏FSF激光器特性的前提下,将激光器的输出光谱移至硅可探测的范围是一种可行的方法。
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引用次数: 2
2-D vector field visualization of corrosion in a small-bore piping system using bobbin-type integrated Hall and GMR sensors arrays 利用筒式集成霍尔和GMR传感器阵列实现小口径管道系统腐蚀的二维矢量场可视化
Pub Date : 2014-04-17 DOI: 10.1109/SAS.2014.6798913
Minhhuy Le, Jungmin Kim, H. Do, Jinyi Lee
This study proposes a 2-D bobbin-type magnetic field vector camera in nondestructive testing for inspection of corrosions in inner and outer diameter (ID and OD) of a small-bore piping system. 16.1 mm diameter bobbin probe was produced by integrated of 71 Hall sensors (BIHaS) and 71 Giant magnetoresistance sensors (BIGiS) in two circumferential lines at interval of 0.6 mm. The BIHaS and BIGiS could measure radial and axial components of alternating magnetic field. Thus ID and OD corrosions could be imaged in a 2-D magnetic field vector. Two small-bore copper (16.56 mm inner diameter, 1.27 mm thickness) and titanium (17.28 mm inner diameter, 0.86 mm thickness) pipes with ID and OD corrosions were inspected and presented in this paper. The measured signal of each sensor array was displayed in a single contour plot and combined 2-D vector plot in real-time during scan.
本文提出了一种用于小口径管道系统内外径(内径和外径)腐蚀检测的二维线轴式磁场矢量相机。将71个霍尔传感器(BIHaS)和71个巨磁阻传感器(BIGiS)以0.6 mm的间隔在两根圆周线上集成,制成直径为16.1 mm的线轴探头。biha和BIGiS可以测量交变磁场的径向分量和轴向分量。因此,内径和外径腐蚀可以在二维磁场矢量中成像。对两根内径和外径腐蚀的小口径铜管(内径16.56 mm,厚度1.27 mm)和钛管(内径17.28 mm,厚度0.86 mm)进行了检测。在扫描过程中,每个传感器阵列的测量信号实时显示在单个等高线图和二维矢量图中。
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引用次数: 5
Wireless aircraft fuel quantity indication system 无线飞机燃油量指示系统
Pub Date : 2014-04-17 DOI: 10.1109/SAS.2014.6798966
J. Bommer, A. Robb, R. Martinez, Shashi Ramamurthy, Jason Harrigan, H. Muniganti, Vivekanand Mannangi, K. Vinoy
A wireless fuel quantity indication system (FQIS) has been developed using an RFID-enabled sensing platform. The system comprises a fully passive tag, modified reader protocol, capacitive fuel probe, and auxiliary antenna for additional energy harvesting. Results of fluid testing show sensitivity to changes in fluid height of less than 0.25in. An RF-DC harvesting circuit was developed, which delivers up to 5dBm of input power through a remote radio frequency (RF) source. Testing was conducted in a loaded reverberation chamber to emulate the fuel tank environment. Results demonstrate feasibility of the remote source to power the sensor with less than 1W of maximum transmit power and under 100ms dwell time (100mW average power) into the tank. This indicates adequate coverage for large transport aircraft at safe operating levels with a sample rate of up to 1 sample/s.
一种无线燃料量指示系统(FQIS)已经开发,使用rfid传感平台。该系统包括一个全无源标签、修改的读取器协议、电容式燃料探针和用于额外能量收集的辅助天线。流体测试结果表明,对小于0.25in的流体高度变化敏感。开发了一种RF- dc采集电路,通过远程射频(RF)源提供高达5dBm的输入功率。试验在加载混响室中进行,以模拟油箱环境。结果表明,远程电源以小于1W的最大发射功率和小于100ms的停留时间(100mW的平均功率)将传感器供电到油箱是可行的。这表明在安全运行水平下,采样率高达1个样本/秒的大型运输机有足够的覆盖范围。
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引用次数: 2
A comparison of two ranging approaches in an active, optical plant canopy sensor 主动光学植物冠层传感器中两种测距方法的比较
Pub Date : 2014-04-17 DOI: 10.1109/SAS.2014.6798956
M. Schaefer, D. Lamb, Ronald C. Bradbury
Active optical sensors that contain their own modulated light sources are becoming popular for “sensing” photosynthetically-active biomass in crops and pastures. These sensors detect optical reflectance to derive spectral vegetation indices, such as the normalised difference vegetation index (NDVI), and are subsequently calibrated to measure plant parameters e.g. biomass. However, research has demonstrated the accuracy of the derived measurements can often be improved by including both a spectral index and a corresponding measure of plant height. This paper describes an active, optical sensor that integrates modulated reflectance sensing with the ability to measure (range) the distance between the source and a target surface. Two ranging techniques are evaluated; one based on the inverse square law (ISL) of reflected radiation and another based on a position-sensitive detector (PSD). Both ranging methods proved capable of reliably delineating target distances out to 4.0 m from the source. Over this range, the PSD detector exhibited a distance-invariant RMSE of ± 2.6 cm whilst the ISL method exhibited an almost linear increase in error of ± 25 % of the measured distance to a spectralon target. Application to a vegetative target (Kikuyu grass), demonstrated the ISL ranging method to yield an average RMSE of ± 3.0 cm in the range of 0.60-1.40 m, while the average RMSE of the PSD over a range of 0.50-1.10 m was observed to be ± 10.0 cm. Despite superior accuracy, target reflectance variations may prove problematic in the use of a PSD ranging sensor and requires further investigation.
含有自身调制光源的主动光学传感器在“感知”作物和牧场的光合活性生物量方面正变得越来越流行。这些传感器检测光学反射率,从而得出光谱植被指数,如归一化植被指数(NDVI),并随后进行校准以测量植物参数,如生物量。然而,研究表明,通常可以通过同时包括光谱指数和相应的植物高度测量来提高衍生测量的准确性。本文描述了一种有源光学传感器,它集成了调制反射传感和测量源和目标表面之间距离的能力。评估了两种测距技术;一种基于反射辐射的平方反比定律(ISL),另一种基于位置敏感探测器(PSD)。事实证明,这两种测距方法都能够可靠地描绘出距离震源4.0米以内的目标距离。在此范围内,PSD检测器显示出距离不变的RMSE为±2.6 cm,而ISL方法显示出与光谱目标测量距离的误差几乎线性增加±25%。应用于植物目标(基库尤草),证明了ISL测距方法在0.60-1.40 m范围内的平均RMSE为±3.0 cm,而PSD在0.50-1.10 m范围内的平均RMSE为±10.0 cm。尽管精度高,但目标反射率变化在PSD测距传感器的使用中可能会出现问题,需要进一步研究。
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引用次数: 0
Non-destructive evaluation of far-side corrosion around the multi-layered rivet by using the solid-state hall sensor array 基于固态霍尔传感器阵列的多层铆钉远端腐蚀无损评价
Pub Date : 2014-04-17 DOI: 10.1109/SAS.2014.6798914
Jungmin Kim, Minhhuy Le, Jinyi Lee
Nondestructive testing and evaluation of aircraft are a great importance from the viewpoint of the integrity and flight safety. In aircraft structures, damage is likely to be observed around the rivets that connect the skin to the frames. This paper presents a sensor system which includes a linearly integrated solid-state Hall sensor array (LIHaS). The LIHaS has 64 InSb Hall sensors arrayed in 0.52 mm of interval respect to 33.28 mm length of measurement. The sensor system was tested on two flat layers of Aluminium alloy for inspecting far-side corrosions having 6~14 mm of diameter and 0.1~1.27 mm of depth.
从飞机的完整性和飞行安全的角度来看,飞机的无损检测和评估具有重要的意义。在飞机结构中,很可能在连接蒙皮和框架的铆钉周围观察到损伤。本文介绍了一种线性集成固态霍尔传感器阵列(LIHaS)传感器系统。LIHaS有64个InSb霍尔传感器,间隔为0.52 mm,测量长度为33.28 mm。在直径6~ 14mm、深度0.1~1.27 mm的两层铝合金平层上对传感器系统进行了测试。
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引用次数: 4
Patch type integrated sensor system for measuring electrical and mechanical cardiac activities 用于测量心脏电和机械活动的贴片式集成传感器系统
Pub Date : 2014-04-17 DOI: 10.1109/SAS.2014.6798924
Eunjeh Hyun, Seungwoo Noh, Chiyul Yoon, Hee Chan Kim
The ElectroMechanical Film (EMFi), a thin and flexible piezoelectric material, has been widely used as a mechanical sensor or actuator. Especially in Biomedical Engineering field, many researchers have used EMFi for measuring ballistocardiogram (BCG) which is a mechanical signal caused by blood ejection from heart. However, previous methods required special equipments installed on a chair or a bed to measure BCG. In this preliminary study, we designed a flexible patch type sensor that can measure electrical and mechanical signal simultaneously on a single unit. The Ballistocardiogram-Electrocardiogram patch (BEpatch), integrated with flexible circuit and attached to chest, can successfully measure fine electrocardiogram (ECG) and BCG signals simultaneously. The result shows that BEpatch can be used for continuous monitoring of bio-signals in a simple and comfortable manner, thereby, advantageous as a wearable health care device.
机电薄膜(EMFi)是一种薄而柔性的压电材料,已广泛应用于机械传感器或执行器。特别是在生物医学工程领域,许多研究人员使用EMFi来测量由心脏射血引起的机械信号——弹道心动图(BCG)。然而,以前的方法需要在椅子或床上安装特殊的设备来测量BCG。在这项初步研究中,我们设计了一种柔性贴片式传感器,可以在单个单元上同时测量电气和机械信号。采用柔性电路集成的balliccardiogram - electrocardiogram patch (BEpatch)贴在胸前,可以同时测量精细心电图(ECG)和BCG信号。结果表明,BEpatch可以简单舒适地对生物信号进行连续监测,具有可穿戴式医疗保健设备的优势。
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引用次数: 10
BlurSense: Dynamic fine-grained access control for smartphone privacy BlurSense:智能手机隐私动态细粒度访问控制
Pub Date : 2014-04-17 DOI: 10.1109/SAS.2014.6798970
Justin Cappos, Lai Wang, Richard S. Weiss, Yi Yang, Yanyan Zhuang
For many people, smartphones serve as a technical interface to the modern world. These smart devices have embedded on-board sensors, such as accelerometers, gyroscopes, GPS sensors, and cameras, which can be used to develop new mobile applications. However, the sensors also pose privacy risks to users. This work describes BlurSense, a tool that provides secure and customizable access to all of the sensors on smartphones, tablets, and similar end user devices. The current access control to the smartphone resources, such as sensor data, is static and coarse-grained. BlurSense is a dynamic, fine-grained, flexible access control mechanism, acting as a line of defense that allows users to define and add privacy filters. As a result, the user can expose filtered sensor data to untrusted apps, and researchers can collect data in a way that safeguards users' privacy.
对很多人来说,智能手机是连接现代世界的技术接口。这些智能设备具有嵌入式传感器,如加速度计、陀螺仪、GPS传感器和摄像头,可用于开发新的移动应用程序。然而,这些传感器也给用户带来了隐私风险。这项工作描述了BlurSense,这是一个工具,可以提供对智能手机、平板电脑和类似终端用户设备上所有传感器的安全和可定制访问。当前对智能手机资源(如传感器数据)的访问控制是静态的和粗粒度的。BlurSense是一种动态的、细粒度的、灵活的访问控制机制,作为一道防线,允许用户定义和添加隐私过滤器。因此,用户可以将过滤后的传感器数据暴露给不受信任的应用程序,研究人员可以以保护用户隐私的方式收集数据。
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引用次数: 22
Detecting spongiosis in stained histopathological specimen using multispectral imaging and machine learning 利用多光谱成像和机器学习技术检测染色组织病理标本中的海绵状病变
Pub Date : 2014-04-17 DOI: 10.1109/SAS.2014.6798945
S. Abeysekera, M. Ooi, Y. Kuang, Chee Pin Tan, S. Hassan
Pathologists spend nearly 80% of their time analysing pathological tissue samples. In addition, the diagnosis is subject to inter/intra-observer variability. Thus to increase productivity and repeatability, a new field known as Computational Pathology has emerged which combines the field of pathology with computer vision, pattern recognition and machine learning. This research develops a new computational pathology framework specifically to aid with detecting a condition known as spongiosis caused by Newcastle Disease Virus infection in poultry. It combines the use of multispectral imaging with feature extraction and classification to detect areas of spongiosis in tissue of infected poultry. The success of this framework is the first step towards a completely automated diagnosis tool for histopathology.
病理学家花费近80%的时间分析病理组织样本。此外,诊断受观察者之间/内部变异性的影响。因此,为了提高生产力和可重复性,出现了一个新的领域,即计算病理学,它将病理学与计算机视觉、模式识别和机器学习相结合。本研究开发了一种新的计算病理学框架,专门用于帮助检测由家禽中新堡病病毒感染引起的海绵状病。它将多光谱成像与特征提取和分类相结合,以检测受感染家禽组织中的海绵状病区域。该框架的成功是迈向组织病理学完全自动化诊断工具的第一步。
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引用次数: 6
期刊
2014 IEEE Sensors Applications Symposium (SAS)
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