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2015 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings最新文献

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Superconductor requirements and characterization for high field accelerator magnets 高场加速器磁体的超导体要求和特性
E. Barzi, A. Zlobin
The 2014 Particle Physics Project Prioritization Panel (P5) strategic plan for U.S. High Energy Physics (HEP) endorses a continued world leadership role in superconducting magnet technology for future Energy Frontier Programs. This includes 10 to 15 T Nb3Sn accelerator magnets for LHC upgrades and a future 100 TeV scale pp collider, and as ultimate goal that of developing magnet technologies above 20 T based on both High Temperature Superconductors (HTS) and Low Temperature Superconductors (LTS) for accelerator magnets. To achieve these objectives, a sound conductor development and characterization program is needed and is herein described. This program is intended to be conducted in close collaboration with U.S. and International labs, Universities and Industry.
2014年粒子物理项目优先小组(P5)美国高能物理(HEP)战略计划支持在超导磁体技术方面继续发挥世界领导作用,用于未来的能源前沿项目。这包括用于大型强子对撞机升级的10至15吨Nb3Sn加速器磁体和未来100 TeV规模的pp对撞机,以及最终目标是开发基于高温超导体(HTS)和低温超导体(LTS)的加速器磁体的20吨以上的磁体技术。为了实现这些目标,需要一个声导体的发展和表征程序,并在此描述。该项目旨在与美国和国际实验室、大学和工业界密切合作。
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引用次数: 1
Study of excitation signals parameters for portable bioimedical devices 便携式生物医疗设备激励信号参数研究
D. Bouchaala, Emna Mekki, T. Günther, P. Büschel, O. Kanoun, N. Derbel
The aim of this paper is to select the suitable excitation signal for a portable biomedical system based on the simulations of different signals while respecting the constraints on the system including excitation time, energy consumption, cost and ease of generation and at the same time guarantying the safety of the patient by limiting the current's magnitude. In order to get the optimum working point that minimize the trade-off between the quality of the reconstructed signal, the time consumption and the hardware complexity when applying the perturbation signal to the system under test, the interaction between pertinent parameters is determined. These parameters are the number of the samples, the sampling frequency and the noise's level. The number of samples (N) is directly related to the memory's size of the hardware used in the measurement, the sampling frequency (Fs) is associated to the clock and the noise's level is affiliated to the algorithm or the measurement hardware. To achieve a good signal's reconstruction, the ratio (Fs/f) should be lower than (~2*N) and the window's size which is proportional to (N, Fs/f) as large as possible.
本文的目的是在对不同信号进行仿真的基础上,选择适合便携式生物医学系统的激励信号,同时尊重系统的激励时间、能量消耗、成本和易于产生等约束条件,同时通过限制电流的大小来保证患者的安全。在将扰动信号应用于待测系统时,为了得到重构信号质量、时间消耗和硬件复杂度之间折衷最小的最佳工作点,确定了相关参数之间的相互作用。这些参数是采样数、采样频率和噪声水平。采样数(N)与测量中使用的硬件的内存大小直接相关,采样频率(Fs)与时钟相关,噪声水平与算法或测量硬件相关。为了实现良好的信号重构,比值(Fs/f)应小于(~2*N),且与(N, Fs/f)成正比的窗口尺寸应尽可能大。
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引用次数: 6
Image processing based system for classification of vehicles for parking purposes 基于图像处理的停车车辆分类系统
Amit Krishan Kumar, M. Assaf, Sunil R. Das, S. Biswas, E. Petriu, V. Groza
This paper develops an image processing based approach for classification of vehicles with the objective of their parking. In the paper, the heights and lengths of the vehicles are first measured on applying image processing and feature extraction techniques. Then, based on the information of the heights and lengths of the vehicles, the vehicles' eligibility to park in a specific parking lot is determined under condition of certain constraints. The determination of the heights and lengths are carried out by comparing the maximum height for a set of vehicles. The system was implemented using MATLAB and the developed technique was tested for accuracy considering various classes of vehicles. For ease of implementation, the system incorporates a camera mounted on a flat surface with fixed pixel setting.
本文提出了一种基于图像处理的车辆分类方法。本文首先利用图像处理和特征提取技术测量了车辆的高度和长度。然后,根据车辆的高度和长度信息,在一定的约束条件下确定车辆在特定停车场的停车资格。高度和长度的确定是通过比较一组车辆的最大高度来实现的。利用MATLAB对系统进行了实现,并对所开发的技术进行了考虑各类车辆的精度测试。为了便于实现,该系统集成了一个安装在具有固定像素设置的平面上的摄像头。
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引用次数: 4
PC based Eddy Current non-destructive testing (NDT) system 基于PC的涡流无损检测系统
Sumayya Abbas, Taha Ali, Uzair S Gilani, Shayan Ahmed, Iqra Sajid, F. Amir, Tariq M. Khan
A cost effective PC based Eddy Current Testing System is designed and developed to detect surface cracks in non-magnetic metals. The developed system is composed of Constant Current AC Source for excitation of the probe; and demodulation circuitry for acquisition of the signal from the crack. Eddy Current Testing Probe is also designed using the Analytical Approach. Surface cracks were successfully detected through developed system. The flaw signal is also plotted in real time on PC. Data logging feature and position sensing is also incorporated.
设计并开发了一种具有成本效益的基于PC的涡流检测系统,用于检测非磁性金属的表面裂纹。所开发的系统由恒流交流源对探头进行激励;以及用于从裂纹中获取信号的解调电路。采用解析法设计了涡流检测探头。通过开发的系统,成功地检测出了表面裂纹。并在PC上实时绘制出缺陷信号。数据记录功能和位置传感也被纳入。
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引用次数: 3
Determining the electromagnetic polarizability tensors of metal objects from rotation measurements 从旋转测量中测定金属物体的电磁极化张量
Yifei Zhao, W. Yin, A. Peyton, C. Ktistis, D. Butterworth
The electromagnetic responses of metal objects can be determined by their electromagnetic polarizability tensors. In landmine detection and geophysics, the electromagnetic tensors of metal objects are usually determined from multi-position measurements or simulations. In this paper, the electromagnetic tensors of metal objects are obtained from rotation measurements. This rotation measurement method can be applied to magnetic sensors with magnetic fields from one direction, e.g. in-line metal detectors.
金属物体的电磁响应可以由其电磁极化张量来确定。在地雷探测和地球物理学中,金属物体的电磁张量通常是通过多位置测量或模拟来确定的。本文通过旋转测量得到了金属物体的电磁张量。这种旋转测量方法可以应用于磁场来自一个方向的磁传感器,例如在线金属探测器。
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引用次数: 1
Real-time velocity profile measurement in two-phase oil/gas flow by twin-plane segmented ECT system 双平面分段ECT系统实时测量两相油气流动速度剖面
Johana Mohamad Elmy, Liyana Mohmad Ameran Hanis, A. R. Ruzairi, Mohd Faizan Marwah Omar
In today's industrial environment, it is common to see the use of pipes or vessels to transfer mixtures of materials or products along them. However, the measurement of the amount delivered can only be done in one way: isolate the components first; then meter, weigh or measure the volume for each individual component. This measuring procedure often stalls the production rate. This work implements a noninvasive, real time monitoring system to measure the flow concentration and velocity distributions of a two-phase (liquid-gas) flow. The system uses the combination of a specially designed twin-plane segmented Electrical Capacitance Tomography (ECT) sensor with 16 portable electrodes and the cross-correlation method as the velocity measurement technique. The measured values or data from the ECT sensor will be manipulated to reconstruct the cross sectional image of the pipeline by computer programming. These images are then cross-correlated to obtain the velocity profile of the multiphase flow. The visualization results deliver information regarding the flow regime, superficial velocity and concentration distribution in two-phase flow rate measurement system. The information obtained is able to improve: the process equipment's design, verification of existing computational modeling and simulation techniques. This technique has the possibility to promote an excellent opportunity to build methods for measuring the velocity field in multiphase flow by using noninvasive technique and cross-correlating.
在今天的工业环境中,使用管道或容器来转移材料或产品的混合物是很常见的。然而,对交付量的测量只能通过一种方式完成:首先将组件隔离;然后测量、称量或测量每个单独成分的体积。这种测量方法常常会使生产速度停滞。这项工作实现了一个无创的实时监测系统,用于测量两相(液气)流的流动浓度和速度分布。该系统采用了专门设计的双平面分段电容量层析成像(ECT)传感器(16个便携式电极)和相互关法作为速度测量技术的组合。利用ECT传感器的测量值或数据,通过计算机编程重建管道的截面图像。然后将这些图像相互关联以获得多相流的速度分布。可视化结果提供了两相流量测量系统的流态、表面流速和浓度分布等信息。所获得的信息能够改进:工艺设备的设计,验证现有的计算建模和仿真技术。该技术为利用无创技术和交叉相关技术建立多相流速度场测量方法提供了良好的机会。
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引用次数: 3
Robust recovery of wideband block-sparse spectrum based on MAP and MMSE estimator 基于MAP和MMSE估计的宽带块稀疏频谱鲁棒恢复
Jia Li, Qiang Wang, Jiayan Qiu, Cong Dong
Indirect spectrum sensing mainly concerns the measurement and analysis of primary wideband analog signal. This paper proposes two robust algorithms based on maximum a-posteriori probability (MAP) and minimum mean-squared error (MMSE) estimators to recover wideband block-sparse spectrum and then detect the spectrum holes in compressive spectrum sensing (CSS). In each iteration of the referred Block-sparse Orthogonal Matching Pursuit based on iterative MAP (BOMP-IMAP) algorithm, one index of block is firstly identified to expand the estimated support. And then, wideband block-sparse spectrum can be recovered through approximating the MAP estimator. Finally, the residual is updated and put into next iteration. In order to approximate the MMSE estimator, the Random BOMP-IMAP (RandBOMP-IMAP) algorithm utilizes a randomized block identification of BOMP-IMAP algorithm to generate multiple solutions, which is followed by the fusion of them to obtain the final approximation. Numerical simulation results concerning probability of detection and detection time under certain noise level or measurement number validate the superiority of the proposed algorithms.
间接频谱感知主要涉及对宽带模拟信号的测量和分析。本文提出了两种基于最大后验概率(MAP)和最小均方误差(MMSE)估计的鲁棒算法,用于恢复宽带块稀疏频谱并检测压缩频谱感知(CSS)中的频谱漏洞。在引用的基于迭代MAP (BOMP-IMAP)算法的块稀疏正交匹配追踪的每次迭代中,首先识别一个块索引以扩大估计支持度。然后,通过近似MAP估计器恢复宽带块稀疏频谱。最后,对残差进行更新并放入下一次迭代中。为了逼近MMSE估计量,Random BOMP-IMAP (RandBOMP-IMAP)算法利用BOMP-IMAP算法的随机块识别来生成多个解,然后将它们融合以获得最终的逼近。在一定噪声水平或测量次数下的检测概率和检测时间的数值仿真结果验证了所提算法的优越性。
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引用次数: 1
Effect of humidity on dielectric properties of mortars with alkali-silica reaction (ASR) gel 湿度对碱-硅反应凝胶砂浆介电性能的影响
A. Hashemi, K. Donnell, R. Zoughi, K. Kurtis
Microwave materials characterization techniques have been extensively and successfully used for evaluating important properties of a wide range of cement-based materials and structures. Recent investigations using these techniques for studying properties of mortar with alkali-silica reaction (ASR) gel have also been very promising. In this research, microwave dielectric properties of multiple mortar samples with different compositions and when subjected to different humidity levels are investigated. This paper presents the results of these experiments and the subsequent analysis pertinent to humidity-related issues in the mortar samples.
微波材料表征技术已被广泛和成功地用于评价各种水泥基材料和结构的重要性能。近年来,利用这些技术研究碱-硅反应凝胶砂浆的性能也取得了很大的进展。在本研究中,研究了不同成分的砂浆样品在不同湿度条件下的微波介电性能。本文介绍了这些实验的结果,并对砂浆样品中与湿度有关的问题进行了后续分析。
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引用次数: 5
Design and performance of an Hb measuring system: Viability of its use in a haemodialysis 血红蛋白测量系统的设计和性能:在血液透析中应用的可行性
S. Cattini, L. Rovati
Haemolysis is an unavoidable side effect of any extracorporeal circulation. If not promptly detected, haemolysis can lead to severe health risks for the patient such as thrombosis, compromised oxygen-carrying capacity that may cause injury to the brain and other organs, and, ultimately, a cardiac arrest.
溶血是任何体外循环不可避免的副作用。如果不能及时发现,溶血会给患者带来严重的健康风险,如血栓形成、携氧能力受损,可能导致大脑和其他器官损伤,并最终导致心脏骤停。
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引用次数: 2
Remote monitoring of wind direction on overhead transmission lines based on Fiber Bragg Grating 基于光纤光栅的架空输电线路风向远程监测
G. Ma, Jun Jiang, Qing Zheng, Cheng-Rong Li, Noel Vishal Nathan, Rui-duo Mu, Kai Zhou, Kuan Ye
A novel wind direction monitoring system for the overhead transmission lines based on Fiber Bragg Grating (FBG) sensing is proposed in this paper. Compared to the existing systems, this system has several unique advantages, such as free from power supply on site, excellent ability to avoid electromagnetic interference, immunity to temperature and long lifespan. Firstly, with horizontal FBG arrangement, light intensity loss of the anemoscope is reduced and the monitoring distance is significantly enlarged. Then, optimization model is proposed to solve the contradiction between wavelength shift ranges of FBG and startup wind speed. Lastly, an algorithm is proposed to obtain wind direction and to eliminate the temperature effect. Experiments were conducted in a wind tunnel to calibrate the sensor. The results indicate that the startup wind speed of the anemoscope is 1.488m/s, and the anemoscope works properly under different wind direction.
提出了一种基于光纤光栅(FBG)传感的架空输电线路风向监测系统。与现有系统相比,该系统具有无需现场供电、抗电磁干扰能力强、抗温度、寿命长等独特优点。首先,水平布置光纤光栅减少了风速仪的光强损失,显著增大了监测距离。然后,针对光纤光栅波长漂移范围与启动风速之间的矛盾,提出了优化模型。最后,提出了一种获取风向和消除温度影响的算法。在风洞中对传感器进行了标定实验。结果表明,该风速仪启动风速为1.488m/s,在不同风向下均能正常工作。
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引用次数: 0
期刊
2015 IEEE International Instrumentation and Measurement Technology Conference (I2MTC) Proceedings
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