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2017 2nd International Symposium on Instrumentation Systems, Circuits and Transducers (INSCIT)最新文献

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Active ISFET sensor readout circuit 有源ISFET传感器读出电路
Luciano Lourenço Furtado da Silva, Felipe Silveira, C. A. de Moraes Cruz, Thiago Daniel de Oliveira Moura
An improved readout circuit interface for ion-sensitive field-effect transistor (ISFET) is proposed in this work. When compared with conventional topologies found on the literature, the proposed ISFET readout circuit presents at least two advantages. The first concerns the simplicity of the new circuity topology, and the second is the additional gain conferred to the sensor output signal. The performance of the proposed readout circuit integrated with the electrical ISFET model was investigated through BSIM3v3 simulations. The conventional ISFET readout topologies are found not to confer gain to the electrical ISFET output signal, and the sensor output signal has its limit predicted by the Nernst s model. Simulation results shows that the proposed ISFET readout circuit topology grants additional gain to the sensor output signal increasing its sensitivity up to three times the Nernst limit.
提出了一种改进的离子敏感场效应晶体管(ISFET)读出电路接口。与文献中发现的传统拓扑结构相比,所提出的ISFET读出电路至少有两个优点。第一个问题是新电路拓扑的简单性,第二个问题是赋予传感器输出信号的额外增益。通过BSIM3v3仿真研究了集成电ISFET模型的读出电路的性能。发现传统的ISFET读出拓扑不能赋予ISFET电输出信号增益,并且传感器输出信号有其由能斯特模型预测的极限。仿真结果表明,所提出的ISFET读出电路拓扑为传感器输出信号提供了额外的增益,使其灵敏度提高到能斯特极限的三倍。
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引用次数: 3
Surface plasmon resonance features of corrugatec copper and gold films: Grating mode operation with wavelength interrogation 波纹铜和金薄膜的表面等离子体共振特性:波长询问的光栅模式操作
E. P. Rodrigues, A. Lima, L.C. Oliveira, Tales Abreu Tavares de Sousa, H. Neff
This work presents a theoretical and experimental results obtained with surface resonance sensors operating in the periodic grating mode. The spatial periodicity of the corrugated surface of the manufactured devices was set to 478 nm. Two types of metallic layers have been tested, one of 50 nm of gold and another of 100 nm of copper. The wavelength interrogation mode has been used and the beam of incident light was shined directly onto the metal layer. The characteristics of the transducer manufactured with the two corrugated surfaces have been explored in the Kretschmann configuration to determine the sensors responsivities. The obtained results confirmed the correctness of the proposed methodology and the feasibility of the proposed transducer designs. The sensor system was tested for situations where a change in the refractive index of the gas occurs due to the insertion of condensed water vapor. Both transducers are tested and results as sensibility and detection limit are presented and compared.
本文介绍了工作在周期光栅模式下的表面共振传感器的理论和实验结果。所制造器件的波纹表面的空间周期性被设置为478 nm。测试了两种类型的金属层,一种是50纳米的金层,另一种是100纳米的铜层。采用波长询问模式,将入射光束直接照射在金属层上。在克雷茨曼结构中,研究了用两个波纹表面制造的传感器的特性,以确定传感器的响应。所得结果证实了所提方法的正确性和所提换能器设计的可行性。对传感器系统进行了测试,以确定由于冷凝水蒸气的插入而导致气体折射率变化的情况。对两种传感器进行了测试,给出了灵敏度和检测限的结果并进行了比较。
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引用次数: 3
A low-power FPN attenuation method in the double-log PMOS APS 双对数PMOS APS中的低功耗FPN衰减方法
C. A. de Moraes Cruz, D. W. de Lima Monteiro, G. Sicard, Francelino Freitas, Alexandre Kennedy Pinto Souza
The active-pixel-sensor (APS) imagers operating in logarithmic mode yield high-dynamic-range images. However, this pixel exhibits a small output signal voltage swing. The double-log PMOS APS improves the signal swing in a factor higher than two compared with the conventional log APS. Fixed-pattern noise across the focal-plane array is particularly critical in the log mode, but can be reduced by double sampling techniques with a voltage reference. This voltage reference is established by means of an internal current and is subject to higher power consumption. In this work an in-pixel voltage reference in voltage mode is proposed, providing a more efficient control and consuming less power than the previous solution, while preserving five transistors per pixel, as before.
主动像素传感器(APS)成像仪工作在对数模式产生高动态范围的图像。然而,这个像素显示出一个小的输出信号电压摆动。与传统的测井APS相比,双对数PMOS APS将信号摆动提高了两倍以上。焦平面阵列上的固定模式噪声在对数模式下尤为重要,但可以通过带参考电压的双采样技术来降低。这个电压基准是通过内部电流建立的,并且受制于更高的功耗。在这项工作中,提出了电压模式下的像素内电压基准,提供比以前的解决方案更有效的控制和更低的功耗,同时保持每个像素五个晶体管。
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引用次数: 0
A noise-cancelling technique for data acquisition systems: A case study on embedded ADCs 数据采集系统的降噪技术:以嵌入式adc为例
Jamelly Ferreira, Isabela Trindade, Leonardo Ramalho, Ilan Sousa, A. Klautau
The noise present in embedded analog-to-digital converter (ADC) of microcontrollers (MCUs) and other System-on-chips (SoCs) is a limiting factor that can impede their use in some application. This noise can be caused due to the proximity between ADCs and digital circuits whose switching couples to the analog signals and degrades the input signal integrity. Moreover, many models of microcontrollers have more than one ADC input channel, and their inputs suffer impairments due to those noise sources. Because the noise source can be the same for all the inputs, the noise is correlated and it can be exploited to increase the signal quality in the digital domain. This paper proposes a novel adaptive noise canceler based on the normalized least mean squares (NLMS) adaptive noise cancellation algorithm. In the proposed technique, three analog inputs of the microcontroller are used, where two are used as reference and one is used for acquiring the desired signal. An experimental setup was implemented for testing the proposed scheme and the results show improvement of more than 20 dB in the noise floor, in cases of noisy power supply.
存在于微控制器(mcu)和其他片上系统(soc)的嵌入式模数转换器(ADC)中的噪声是一个限制因素,可能会阻碍它们在某些应用中的使用。这种噪声可能是由于adc和数字电路之间的接近造成的,这些电路的开关耦合到模拟信号并降低了输入信号的完整性。此外,许多型号的微控制器具有多个ADC输入通道,并且由于这些噪声源,它们的输入受到损害。由于所有输入的噪声源可能是相同的,因此噪声是相关的,可以利用它来提高数字域的信号质量。提出了一种基于归一化最小均方(NLMS)自适应消噪算法的自适应消噪器。在提出的技术中,使用了微控制器的三个模拟输入,其中两个用作参考,一个用于获取所需信号。实验结果表明,在有噪声电源的情况下,该方案的本底噪声提高了20 dB以上。
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引用次数: 0
Estimation of lithium-ion battery model parameters using experimental data 用实验数据估计锂离子电池模型参数
Rafael M. Santos, C. L. G. S. Alves, E. Macedo, J. Villanueva, L. V. Hartmann
Lithium battery cells are commonly modeled using an equivalent circuit with large lookup tables for each circuit element, allowing flexibility for the model to match measured data as close as possible. Pulse discharge curves and charge curves are collected experimentally to characterize the battery performance at various operating points. It can be extremely difficult to fit the simulation model to the experimental data using optimization algorithms, due to the number of values in the lookup tables. This paper describes a detailed procedure of how estimate the battery model parameters using experimental data. the experiment is realized with a computer that realize the control of charge and discharge process sending SCPI commands via serial communication to the Four Quadrant Power Supply from Kepco Inc. with 100V and 10A as limits. The estimation of each battery model parameter is made to lithium-ion battery with a capacity of 20 Ah, and the presented methodology can be easily adapted to any type of battery. The mean objective of the results is estimate the battery parameters to posteriorly use the battery model to estimate the SoC by adaptive method. As results, after the estimation of each parameter, it is possible to observe the resistances exponential behavior, where they decrease as SoC decrease. As conclusions, this paper can contribute to the field of measurement of magnetic and non electric quantities, where it helps to determine the Battery Equivalent Circuit Model and its parameters.
锂电池通常使用等效电路进行建模,每个电路元件都有大型查找表,从而允许模型尽可能灵活地匹配测量数据。实验采集了脉冲放电曲线和充电曲线,以表征电池在不同工作点下的性能。由于查找表中的值的数量,使用优化算法将模拟模型拟合到实验数据可能非常困难。本文详细介绍了利用实验数据估计电池模型参数的方法。该实验是在一台计算机上实现的,该计算机以100V和10A为限,通过串行通信向韩国电力公司的四象限电源发送SCPI命令,实现充放电过程的控制。对容量为20ah的锂离子电池进行了各模型参数的估计,所提出的方法可以很容易地适用于任何类型的电池。结果的平均目标是估计电池参数,然后使用电池模型通过自适应方法估计电池荷电状态。结果,在对每个参数进行估计之后,可以观察到电阻的指数行为,其中电阻随着SoC的降低而降低。综上所述,本文可以为磁量和非电量的测量领域做出贡献,有助于确定电池等效电路模型及其参数。
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引用次数: 18
A cosmic rays based method to detect and correct PMT gain variations for the ν-Angra veto system 基于宇宙射线的ν-Angra否决系统PMT增益变化检测和校正方法
L. Melo, G. Lopes, D. M. Souza, I. A. Costa, A. F. Junior, R. Nobrega, J. Anjos, H. Lima, G. Cernichiaro, I. Pepe, E. D. S. Filho, D. Ribeiro, P. Chimenti, G. Guedes, E. Kemp
The Neutrinos Angra (ν-Angra) Experiment aims to construct an antineutrinos detection device capable of monitoring the Angra dos Reis nuclear reactor activity. The proposed system considers a detector operating on the surface, which makes it exposed to a high rate of background noise, mainly due to cosmic rays. Therefore, the veto system has a fundamental role in the experiment viability. This paper proposes an innovative methodology to monitor the gain variation of the photomultiplier tubes in the veto system, during operation, based on cosmic rays muons.
中微子安格拉(ν-安格拉)实验旨在建造一个能够监测安格拉多斯赖斯核反应堆活动的反中微子探测装置。提出的系统考虑了一个在表面上运行的探测器,这使得它暴露在高比率的背景噪声中,主要是由于宇宙射线。因此,否决制度对实验可行性具有基础性作用。本文提出了一种基于宇宙射线μ介子监测光电倍增管运行过程中增益变化的创新方法。
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引用次数: 1
A study of distance/similarity measurements in the context of signal processing (density estimation) 信号处理(密度估计)中距离/相似性测量的研究
D. M. Souza, I. A. Costa, R. Nobrega
Currently the number of applications where the data generation function is not known has been growing, making necessary the use of non-parametric estimation techniques to describe such model. Therefore, relevant questions emerge regarding the quality of the model that represents some dataset and how to quantify this quality. This article aims to evaluate some of the measurements presented in the literature used for this purpose, evaluating different pdf regions in the context of goodness of fit.
目前,数据生成函数未知的应用越来越多,因此有必要使用非参数估计技术来描述这类模型。因此,出现了有关代表某些数据集的模型的质量以及如何量化这种质量的相关问题。本文旨在评估用于此目的的文献中提出的一些测量方法,在拟合优度的背景下评估不同的pdf区域。
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引用次数: 1
Semiconductor bending setup for electrical characterization of mechanical stress 机械应力电学表征用半导体弯曲装置
R. Bühler, A. Perin, R. Giacomini
This work proposes and describes in details a complete setup solution for testing of non-encapsulated electronic devices under mechanical stress. The equipment was implemented and calibrated to later use in electrical characterization of devices, such as MOSFETs and diodes under controlled mechanical stress. The semiconductor bending equipment allows the electrical characterization of devices using already existent probe stations in laboratories without additional modifications, as presented here.
这项工作提出并详细描述了一个完整的解决方案,用于测试机械应力下的非封装电子器件。该设备经过了实施和校准,以便以后用于器件的电气特性,例如在受控机械应力下的mosfet和二极管。半导体弯曲设备允许使用实验室中已经存在的探针站的设备的电气特性,而无需额外的修改,如这里所示。
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引用次数: 0
Modeling and practical evaluation of a class-E amplifier with a three-coil inductive link 带三圈电感链路的e类放大器的建模与实用评价
Luian H. Zanoni, F. L. Bertotti
This paper presents the state-space modeling of a system consisting of a class-E amplifier and an inductive link with three coils, featuring a reading unit and a sensor unit. From the developed model, it was possible to carry out a series of simulations in order to evaluate and improve the system performance before its implementation. The inductive link is able to perform the energy transfer from the reading unit to the sensing unit, in order to supply power to a given load in the sensing unit. The class-E amplifier and inductive link were implemented and the results showed that it is possible to supply a low power microcontroller and a sensor with the class-E amplifier at a supply voltage of 15V for a maximum distance of 30 mm between the reading and sensing unit coils.
本文介绍了由e类放大器和三线圈电感链路组成的系统的状态空间建模,该系统具有读取单元和传感器单元。根据所建立的模型,可以在系统实施前进行一系列的仿真,以评估和改进系统的性能。所述感应链路能够执行从所述读取单元到所述传感单元的能量传输,以便向所述传感单元中的给定负载供电。实现了e类放大器和感应链路,结果表明,在15V的供电电压下,e类放大器可以在读取和传感单元线圈之间的最大距离为30mm的情况下,为低功耗微控制器和传感器供电。
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引用次数: 0
A low-cost solar generation monitoring system suitable for internet of things 一种适合物联网的低成本太阳能发电监测系统
Ricardo Mazza Zago, F. Fruett
This work presents an internet of things low cost instrument specially developed to measure and quantify the energy generation of photovoltaic panels. A hub was developed, capable of managing networks with hundreds of nodes, storing the data locally and being able to transmit relevant information to cloud services, besides that, hosts a HTML page for local and internet access to data. The sensor nodes can measure solar panel DC outputs up to 60 V and 30 A. Besides the system was designed to have low-power consumption. A display interface to manage data from many sensors allows view and generate period reports in XLS, CSV and PDF formats.
这项工作提出了一种物联网低成本仪器,专门用于测量和量化光伏板的能量产生。开发了一个集线器,能够管理拥有数百个节点的网络,在本地存储数据,并能够将相关信息传输到云服务,除此之外,还托管一个HTML页面,供本地和互联网访问数据。传感器节点可以测量高达60v和30a的太阳能电池板直流输出。此外,该系统的设计具有低功耗。一个显示界面来管理来自许多传感器的数据,允许以XLS、CSV和PDF格式查看和生成周期报告。
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引用次数: 5
期刊
2017 2nd International Symposium on Instrumentation Systems, Circuits and Transducers (INSCIT)
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