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2013 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)最新文献

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Cough sound discrimination in noisy environments using microphone array 基于麦克风阵列的噪声环境咳嗽声识别
P. Moradshahi, H. Chatrzarrin, R. Goubran
Cough sound discriminator algorithms are capable of distinguishing between dry and wet cough types. The performance of such algorithms, however, is affected by noise and reverberation in the environment. The effect of reverberation on the performance of cough sound discriminators was previously studied in [1]. In this paper, the effect of noise on the performance of cough sound discriminator is studied and quantitatively measured using previously defined Linear Separation Score (LSS) [1]. Experiments revealed a significant decrease in the performance of cough sound discriminator in the presence of white noise using a single microphone for cough sound acquisition. A microphone array structure containing a maximum of 7 microphones along with delay-and-sum beamforming algorithm was used to improve the performance of the cough sound discriminator. Experimental results showed improvement in the performance of the cough sound discriminator in the presence of white noise using microphone arrays.
咳嗽声音鉴别算法能够区分干咳和湿咳类型。然而,这种算法的性能受到环境中的噪声和混响的影响。混响对咳嗽声鉴别器性能的影响已有文献[1]研究。本文研究了噪声对咳嗽声鉴别器性能的影响,并使用先前定义的线性分离评分(Linear Separation Score, LSS)进行了定量测量[1]。实验表明,在白噪声存在下,使用单麦克风采集咳嗽声时,咳嗽声鉴别器的性能明显下降。为了提高咳嗽声鉴别器的性能,采用了最多包含7个麦克风的麦克风阵列结构和延迟和波束形成算法。实验结果表明,在白噪声存在下,使用麦克风阵列可以改善咳嗽声鉴别器的性能。
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引用次数: 17
MEMS gyroscope sensors for wind turbine blade tip deflection measurement MEMS陀螺仪传感器用于风力涡轮机叶片尖端偏转测量
Xu Fu, Lihan He, Hai Qiu
Monitoring the blade tip deflection of wind turbines in real time could prevent catastrophic failures caused by blade striking the tower. In this paper, a MEMS-based gyroscope sensor is proposed to measure the wind turbine blade tip deflection. A neural network model-based estimation method is developed to estimate the blade tip deflection from 3-dimensional gyroscope data. The proposed system is validated by field test in a 1.6MW wind turbine with 100-meters rotating diameter. To evaluate the measurement accuracy, a laser distance finder is also installed on the wind turbine tower outside to give a reference value of the blade tip to tower clearance.
实时监测风力发电机组的叶尖挠度,可以防止因叶片撞击塔架而造成的灾难性故障。本文提出了一种基于mems的陀螺仪传感器来测量风力机叶片叶尖挠度。提出了一种基于神经网络模型的基于三维陀螺仪数据的叶尖偏转估计方法。该系统已在一台旋转直径100米的1.6MW风力发电机组上进行了现场试验。为了评估测量精度,还在风力机塔架外部安装了激光测距仪,以给出叶片尖端对塔架间隙的参考值。
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引用次数: 13
Quantitative measurement of gas component using multisensor array and NPSO-based LS-SVR 基于多传感器阵列和npso的LS-SVR气体组分定量测量
Kai Song, Qi Wang, Jianfeng Li, Hongquan Zhang
To solve the nonlinear response of semiconductor gas sensor and cross-sensitivity to the non-target gases, this paper studies gas sensor array and least square support vector regression (LS-SVR) based gas concentration measurement method. Methane (CH4), hydrogen (H2) and their mixtures are selected as the target gases. A multi-sensor array is composed of four metal oxide semiconductor (MOS) gas sensors with properties of different sensitivity. LS-SVR is used to establish the quantitative analysis model of each gas component. Given the difficulty in selecting parameters of LS-SVR and the high computational complex in using cross-validation when modeling on each gas component, this paper proposes a niche particle swarm optimization (NPSO) based parameter optimization algorithm which can find the global optimal parameters of the established LS-SVR model of each gas component. Compared with other methods such as artificial neural networks (ANNs), this proposed method improves precision of concentration measurement, and it is particularly adequate for the quantitative detection of gas concentrations within small training samples.
为解决半导体气体传感器的非线性响应和对非目标气体的交叉敏感问题,研究了基于气体传感器阵列和最小二乘支持向量回归(LS-SVR)的气体浓度测量方法。选择甲烷(CH4)、氢(H2)及其混合物作为目标气体。由四个灵敏度不同的金属氧化物半导体(MOS)气体传感器组成多传感器阵列。利用LS-SVR建立了各气体组分的定量分析模型。针对LS-SVR模型在对各气体组分建模时参数选择困难、交叉验证计算量大的问题,提出了一种基于小生境粒子群优化(NPSO)的参数优化算法,该算法能够找到所建立的LS-SVR模型中各气体组分的全局最优参数。与人工神经网络(ann)等方法相比,该方法提高了浓度测量的精度,特别适合于小训练样本内气体浓度的定量检测。
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引用次数: 4
Cognitive stress recognition 认知压力识别
Taylor K. Calibo, Justin A. Blanco, S. Firebaugh
This work explores using a low-cost electroencephalography (EEG) headset to quantify the human response to stressed and non-stressed states. We used a Stroop color-word interference test to elicit a mild stress response in 18 test subjects while recording scalp EEG. EEG signals were analyzed using an algorithm that computed the root mean square voltage in the beta, alpha, and theta bands immediately following the presentation of the Stroop stimuli. These features were then used as inputs to logistic regression and k-nearest neighbor classifiers. Results showed that there was a median accuracy of 73.96% for classifying mental state using the O1 sensor on the Emotiv headset.
这项工作探索使用低成本脑电图(EEG)耳机来量化人类对压力和非压力状态的反应。在记录头皮脑电图的同时,采用Stroop色词干扰测试诱发18名被试的轻度应激反应。在Stroop刺激出现后,使用计算β、α和θ波段均方根电压的算法分析脑电图信号。然后将这些特征用作逻辑回归和k近邻分类器的输入。结果表明,使用Emotiv头戴式耳机上的O1传感器对精神状态进行分类的中位数准确率为73.96%。
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引用次数: 27
Design and implementation of a on-board device for photovoltaic panels monitoring 一种光伏板监测机载装置的设计与实现
L. Ciani, L. Cristaldi, M. Faifer, M. Lazzaroni, M. Rossi
Nowadays the world energy infrastructure is subjected to a progressive transformation. In fact it is already possible to notice the growing number of distributed small generation units, based on different technologies, directly connected to the power grid. At present the energy that can be produced by the sun and wind seem to be the most promising renewable energy sources. The use of the solar energy requires to optimize the efficiency of the converting chain and to maintain the performances of the system. These requirements highlight the need to equip photovoltaic (PV) plants with efficient condition monitoring tools. In this paper a hardware solution for monitoring system that allows implementing algorithm devoted to check the dependability of the PV panels and to improve the overall system efficiency is presented.
当今世界能源基础设施正经历着一场渐进式的变革。事实上,我们已经可以注意到越来越多的分布式小型发电机组,基于不同的技术,直接连接到电网。目前,太阳能和风能似乎是最有前途的可再生能源。太阳能的利用需要优化转换链的效率,并保持系统的性能。这些要求突出了为光伏电站配备高效状态监测工具的必要性。本文提出了一种监控系统的硬件解决方案,该方案允许实现专门用于检查光伏板可靠性的算法,从而提高系统的整体效率。
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引用次数: 31
System architecture of intelligent personal communication node for body sensor network 人体传感器网络智能个人通信节点系统架构
Won-Jae Yi, Sufeng Niu, T. Gonnot, J. Saniie
In this paper, we introduce a wireless body sensor network (BSN) system architecture with sensor data collection, signal processing, analysis and transmission capabilities. These capabilities are established on an intelligent Personal Communication Node (iPCN) consisting of an FPGA board and/or an Android smartphone with wireless connections to sensor nodes and a central server. We demonstrate signal processing feasibility for both iPCN candidates by observing Fast Fourier Transform (FFT) computation performance. Acceleration, temperature, electrocardiography (ECG) and phonocardiography (PCG) signal data collections using an Android smartphone are established for data transmissions and graphical/numerical display in real-time. Wireless protocols such as Near Field Communication (NFC), Bluetooth, Wi-Fi and cellular data network connections are used for data transmission. This basic system emphasizes the capability to mobilize and enable remote diagnosis of system users while maintaining normal day-to-day activities.
本文介绍了一种具有传感器数据采集、信号处理、分析和传输功能的无线身体传感器网络(BSN)系统架构。这些功能建立在智能个人通信节点(iPCN)上,该节点由FPGA板和/或具有无线连接到传感器节点和中央服务器的Android智能手机组成。我们通过观察快速傅里叶变换(FFT)的计算性能来证明两个候选iPCN的信号处理可行性。利用Android智能手机建立加速度、温度、心电图(ECG)和心音图(PCG)信号数据采集,实现数据传输和实时图形/数字显示。无线协议,如近场通信(NFC)、蓝牙、Wi-Fi和蜂窝数据网络连接用于数据传输。这个基本系统强调在维持正常日常活动的同时动员和启用系统用户远程诊断的能力。
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引用次数: 9
A fully integrated three-axis thermal accelerometer 一个完全集成的三轴热加速度计
C. S. Silva, J. Pontes, J. Viana, L. Rocha, J. Gaspar
A combined fabrication process using polymer and silicon planar microtechnologies is presented here and used for the fabrication of a fully-integrated three-axis thermal accelerometer. The use of polymers (polystyrene and polyimide) with low thermal conductivities improves the overall power consumption of the thermal accelerometer and enables a simple and low-cost fabrication process. The accelerometer is composed of 4 polystyrene microinjected structural microparts (two identical top parts and two identical central parts) and three polyimide membranes (two identical z-axis membranes and a central membrane). The microinjected parts provide the mechanical support for the active elements that are placed on the membranes (the heater and the temperature sensors). Fabricated microparts and membranes are presented and measurements performed on central membranes are used to characterize the heater. Experimental results reveal that a power of 58 mW is required to increase the temperature in the heater to 580K.
本文提出了一种利用聚合物和硅平面微技术的组合制造工艺,并将其用于制造全集成三轴热加速度计。使用导热系数低的聚合物(聚苯乙烯和聚酰亚胺)提高了热加速度计的整体功耗,并实现了简单和低成本的制造工艺。加速度计由4个聚苯乙烯微注射结构微部件(两个相同的顶部和两个相同的中心部件)和3个聚酰亚胺膜(两个相同的z轴膜和一个中心膜)组成。微注射部件为放置在膜上的活性元件(加热器和温度传感器)提供机械支持。制备的微部件和膜提出和测量执行的中心膜是用来表征加热器。实验结果表明,将加热器的温度提高到580K需要58 mW的功率。
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引用次数: 3
The forthcoming IEEE standard 1696 on test methods for characterizing circuit probes 即将发布的IEEE标准1696电路探头特性测试方法
N. Paulter, John R. Jendzurski, Michael M. McTigue, Bill Hagerup, T. Linnenbrink
The Technical Committee 10 (TC-10) of the IEEE Instrumentation and Measurement Society initiated a new standards activity in 2006 for the development of test methods to characterize the performance of circuit probes. This standard contains a set of performance parameters that describe probe performance along with a test method for each of these parameters. All test methods consider both single-ended and differential probes. The probes may be either stand alone, that is, they are not necessarily constrained to operate with one model of waveform recorder (such as an oscilloscope), or a probe-scope system, where the probe is designed by the probe manufacturer to work with one or more models of oscilloscopes. The probes considered in this standard are all active high-input impedance devices. Both static and dynamic signal measuring performance parameters are considered in the P1696. The key to accurate measurements of the dynamic signal measurement properties of the probe is a quality test fixture, which is described in the standard.
IEEE仪器与测量学会技术委员会10 (TC-10)于2006年发起了一项新的标准活动,用于开发表征电路探头性能的测试方法。本标准包含一组描述探针性能的性能参数,以及每个参数的测试方法。所有的测试方法都考虑单端和差分探头。探头可以是独立的,也就是说,它们不一定限于与一种型号的波形记录仪(如示波器)一起工作,或者探头-示波器系统,探头制造商设计的探头可以与一种或多种型号的示波器一起工作。本标准中考虑的探头都是有源高输入阻抗器件。在P1696中考虑了静态和动态信号测量性能参数。准确测量探头动态信号测量特性的关键是质量测试夹具,标准中对此进行了说明。
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引用次数: 0
A novel interferometric millimeter wave Doppler radar architecture 一种新型干涉式毫米波多普勒雷达结构
S. Liao, N. Gopalsami, S. Bakhtiari, T. Elmer, A. C. Raptis
A universal, mixerless millimeter wave (mmW) Doppler radar architecture consisting of simply a Continuous Wave (CW) source and an intensity detector based on optical interferometry technique has been assembled. The phase information is obtained by using an oscillating mirror in the reference arm, similar to that used by the FTIR (Fourier Transform Infrared spectroscopy) technique. The reference mirror oscillates at a frequency that is higher than twice the Doppler frequency of the object. Rigorous mathematical formulas have been derived to solve for both the amplitude and the phase of the Doppler signal, by using the Low-Frequency-Band (LFB) and High-Frequency-Band (HFB) signals. The Doppler frequency signature of a moving object can be obtained from the Fourier transform of the phase. A prototype at 94 GHz was built and tested using a ball pendulum target moving over a full-swing distance much smaller than a wavelength. Both the measured amplitude and phase have been shown to agree well with the experimental parameters. The interferometric Doppler radar architecture is universal and can be extended to THz without significant change of components.
组装了一种通用的无混频器毫米波多普勒雷达结构,该结构仅由连续波源和基于光学干涉测量技术的强度检测器组成。相位信息是通过使用参考臂中的振荡镜获得的,类似于使用FTIR(傅里叶变换红外光谱)技术。参考镜的振荡频率高于物体的多普勒频率的两倍。利用低频和高频信号,推导出了求解多普勒信号幅值和相位的严格数学公式。由相位的傅里叶变换可以得到运动物体的多普勒频率特征。建立了一个94 GHz的原型,并使用一个比波长小得多的球摆目标在全摆距离上移动进行了测试。测得的幅值和相位与实验参数吻合较好。干涉多普勒雷达结构具有通用性,可以扩展到太赫兹,而不需要显著改变元件。
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引用次数: 10
A low-cost ultrasonic wind speed and direction measurement system 一种低成本的超声波风速和风向测量系统
G. Bucci, F. Ciancetta, E. Fiorucci, D. Gallo, C. Landi, M. Luiso
The paper deals with a low-cost transducer that implements an improved technique for wind speed measurement in open air. The instrument is a 2-axis ultrasonic anemometer, capable of monitoring both wind speed and direction. Its main advantage is that using the ultrasonic technique it has no moving parts, allowing for the utilization in a variety of applications requiring low maintenance and fast response to rapid wind gusts. Wind speed measurement for power turbine control can be considered as a reference application of it. The proposed instrument presents a simple design and is constructed using commercially available components, to reduce development costs. In the paper the proposed architecture is presented, discussing the algorithm applied to process the transduced ultrasonic signals. Some results obtained during the first tests are also presented and discussed, suggesting for successive improvements.
本文研究了一种低成本的传感器,实现了一种改进的露天风速测量技术。该仪器是一个两轴超声波风速计,能够监测风速和风向。它的主要优点是使用超声波技术,它没有运动部件,允许在各种需要低维护和快速响应快速阵风的应用中使用。风速测量在发电机组控制中的应用可作为风力测量的参考。所提出的仪器具有简单的设计,并使用商用组件构建,以降低开发成本。本文给出了该系统的结构,并讨论了处理换能型超声信号的算法。本文还介绍和讨论了在第一次试验中获得的一些结果,并提出了后续改进的建议。
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引用次数: 27
期刊
2013 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)
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