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2020 XXIX International Scientific Conference Electronics (ET)最新文献

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Approach to reduce PCB distortion after heat treatment for soldering with reflow process 用回流工艺减少焊接热处理后PCB变形的方法
Pub Date : 2020-09-16 DOI: 10.1109/ET50336.2020.9238213
V. Tsenev, V. Videkov
The report presents approach to reduce PCB distortion after heat treatment for soldering using a reflow process. The influence of the temperature profile at different heating of the lower side of the board has been studied and an optimal one has been established, in which the distortion of the boards is minimal and there is no danger of creating defects on the lower side. Conclusions are made when this approach can be used and how a secure temperature profile can be achieved for minimal board distortion after soldering with a reflow process.
该报告提出了一种方法,以减少热处理后的PCB焊接使用回流工艺失真。研究了不同加热条件下板面温度分布的影响,确定了板面变形最小且板面不产生缺陷的最优温度分布。当使用这种方法时,以及如何在用回流工艺焊接后实现安全的温度分布以实现最小的板变形,得出结论。
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引用次数: 0
Reliability estimation of transistor switches in push-pull DC/DC hard switching converter 推挽式DC/DC硬开关变换器中晶体管开关的可靠性评估
Pub Date : 2020-09-16 DOI: 10.1109/ET50336.2020.9238269
P. Prodanov, D. Dankov
Power semiconductors have a significant importance to reliability of electronic power convertors. In recent years there are an elements with higher parameters, high efficiency and low power losses. This requirements also can be applied into the power converters. This can be used to determine their reliability parameters and its estimation. Probability of failure-free operation depends on type of elements, their electrical and thermal modes, quality and environmental conditions. In this paper are consider reliability parameters of three type of power semiconductors – SiC MOSFET, “classic” MOSFET and IGBT transistors.
功率半导体对电子电源变换器的可靠性具有重要意义。近年来出现了一种参数高、效率高、功耗低的元件。这一要求也适用于电源变换器。这可用于确定其可靠度参数及其估计。无故障运行的可能性取决于元件的类型,它们的电气和热模式,质量和环境条件。本文研究了三种功率半导体器件——SiC MOSFET、“经典”MOSFET和IGBT晶体管的可靠性参数。
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引用次数: 2
A Study On Information Security Management 信息安全管理研究
Pub Date : 2020-09-16 DOI: 10.1109/ET50336.2020.9238331
Georgi Tsochev, I. Stankov
Cybersecurity is the only defense in one of the longest wars the world has ever known. Battles are fought daily against nation states, organized crime, thieves, terrorists and bored but smart children. This war escalates every day as the battlefield grows. The main focus of the IT group is to ensure efficient and fast processing of information, while the main goal of the information security group is to ensure confidentiality, integrity and availability of information. The paper presents a review of information security management and the main principles in this field.
网络安全是世界上已知的最长战争之一的唯一防御。每天都在与民族国家、有组织犯罪、小偷、恐怖分子和无聊但聪明的孩子们作战。随着战场的扩大,这场战争每天都在升级。IT组的主要重点是确保信息的高效和快速处理,而信息安全组的主要目标是确保信息的机密性、完整性和可用性。本文综述了信息安全管理的研究现状和主要原则。
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引用次数: 2
Innovative Laboratories for Teaching on Photovoltaic Generation in Higher Education 高等教育光伏发电教学创新实验室
Pub Date : 2020-09-16 DOI: 10.1109/ET50336.2020.9238310
A. Ciocia, P. Di Leo, Stefania Fichera, Gabriele Malgaroli, A. Russo, F. Spertino, S. Tzanova, Bolormaa Dalanbayar
The production of energy from Photovoltaic technology is becoming more and more relevant. Therefore, it is essential that academic world focuses attention on this topic in order to properly teach and transmit knowledge, skills and abilities. These ones are very useful in work activities. The academic course “Photovoltaic Power Generation” aims to better explain theoretical aspects by practical activities which require the implementation of innovative laboratories for learning. This paper presents the guidelines for replication of laboratory practices (twin labs), already offered to Italian students, in the context of the project EU-MONG.
利用光伏技术生产能源正变得越来越重要。因此,为了正确地教授和传递知识、技能和能力,学术界必须关注这一主题。这些在工作活动中非常有用。“光伏发电”课程旨在通过实践活动更好地解释理论方面,这需要实施创新的实验室学习。本文介绍了在EU-MONG项目背景下,已经提供给意大利学生的实验室实践(双实验室)复制指南。
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引用次数: 1
Correlated Multiple Sampling Techniques for Sensor Signal Conditioning 传感器信号调理的相关多重采样技术
Pub Date : 2020-09-16 DOI: 10.1109/ET50336.2020.9238159
D. Dobrev, T. Neycheva
Correlated Double Sampling (CDS) is a widely used technique in sensor signal conditioning. It effectively cancels offset and low-frequency (flicker) noise. CDS is a discrete time signal processing technique, implemented with Switched Capacitor (SC) circuits or after ADC with a Digital Signal Processing (DSP) algorithm. This paper describes a simple approach wherein the CDS technique is extended to Correlated Multiple Sampling (CMS) techniques, and with the price of processing of more samples, the new CMS techniques greatly improves the amplifier offset and flicker noise suppression.
相关双采样(CDS)是一种广泛应用于传感器信号调理的技术。它有效地消除了偏移和低频(闪烁)噪声。CDS是一种离散时间信号处理技术,通过开关电容(SC)电路或数字信号处理(DSP)算法在ADC后实现。本文介绍了一种简单的方法,将CDS技术扩展到相关多重采样(CMS)技术,以处理更多采样为代价,新的CMS技术大大改善了放大器偏置和闪烁噪声抑制。
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引用次数: 0
Power Optimization of LoRaWAN Wireless End Sensor Node LoRaWAN无线端传感器节点功耗优化
Pub Date : 2020-09-16 DOI: 10.1109/ET50336.2020.9238204
Stanislav Asenov, D. Tokmakov
The paper presents a method for optimizing the power consumption of the LoraWAN sensor node using the ESP32 microcontroller. We use an Espressif ESP32 microcontroller, a BMP280 pressure sensor, and a SX1276 LoRaWAN transmitter. By using the Ultra-Low-Power Coprocessor, included in the structure on the ESP32 microcontroller, to make measurements, instead of Xtensa® 32-bit LX6 microprocessor, we can reduce microcontroller power consumption. Optimization of the power consumption increases battery life and sensor node autonomous operations for years. We use the Wi-Fi interface of the microcontroller to access the web server of ESP32 to configure the parameters of the wireless sensor node.
提出了一种利用ESP32单片机优化LoraWAN传感器节点功耗的方法。我们使用expressif ESP32微控制器,BMP280压力传感器和SX1276 LoRaWAN变送器。通过使用ESP32微控制器结构中包含的超低功耗协处理器来进行测量,而不是Xtensa®32位LX6微处理器,我们可以降低微控制器的功耗。优化的功耗增加了电池寿命和传感器节点自主运行数年。我们利用单片机的Wi-Fi接口访问ESP32的web服务器,对无线传感器节点的参数进行配置。
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引用次数: 3
A 50MHz-3100MHz DDS based Frequency Synthesizer Module 50MHz-3100MHz基于DDS的频率合成器模块
Pub Date : 2020-09-16 DOI: 10.1109/ET50336.2020.9238241
H. Aniktar
The Software Defined Radio (SDR) concept has attracted considerable interest from research community, industry and military in recent years. Multi-mode, multi-band or software defined radio terminals enable the user to have access to different systems with a single terminal. Realization of multiband, multi-mode, or software defined radio terminals requires technical progress in several areas. The design of programmable, tunable and/or wideband radio frequency (RF) front-end components carries extreme importance for the realization of such a SDR terminal. This proposal shows a DDS (Direct Digital Synthesizer) based synthesizer design which has capability of high tuning speed (17us), low resolution (1Hz), superior phase noise performance, moderate spurious performance and wide tuning range (50MHz-3100MHz).
软件定义无线电(SDR)概念近年来引起了研究界、工业界和军方的极大兴趣。多模式、多频带或软件定义的无线电终端使用户能够使用单个终端访问不同的系统。实现多频段、多模式或软件定义的无线电终端需要在几个领域取得技术进步。可编程、可调谐和/或宽带射频(RF)前端组件的设计对于实现这种SDR终端具有极其重要的意义。本文提出了一种基于DDS (Direct Digital Synthesizer)的合成器设计方案,该合成器具有高调谐速度(17us)、低分辨率(1Hz)、优越的相位噪声性能、中等杂散性能和宽调谐范围(50MHz-3100MHz)。
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引用次数: 0
Models in COMSOL of Attenuation of Sonic Crystal Noise Barrier depend on Different Form 声波晶体声屏障衰减的COMSOL模型取决于不同的形式
Pub Date : 2020-09-16 DOI: 10.1109/ET50336.2020.9238232
E. Gieva, I. Ruskova
In the present publication we have designed models in COMSOL of noise barriers. The influence of the attenuation of the different geometric shapes of the barriers at different frequencies is considered and analysed. The influence of shape at different frequencies is very important parameter and can be decisive. Depending on the application, based on the performed analyses and the obtained results, the most suitable noise barrier, depending on the application, can be selected.
在本出版物中,我们在COMSOL中设计了噪声屏障的模型。考虑并分析了不同几何形状的势垒在不同频率下衰减的影响。形状在不同频率下的影响是非常重要的参数,可以是决定性的。根据应用,根据所进行的分析和获得的结果,可以根据应用选择最合适的隔音屏障。
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引用次数: 0
An Extended Analysis of Reliability Test Data 可靠性试验数据的扩展分析
Pub Date : 2020-09-16 DOI: 10.1109/ET50336.2020.9238212
T. Papanchev, J. Garipova
This paper discusses the possibilities for detecting and evaluating additional information on the influence of various stressors on electronic devices when data from two-sreess factors accelerated tests are collected. Two approaches are considered - standard, with one fixed stress factor, and estimation by severity of impact by solving partial differential equations.
本文讨论了在收集双应力因子加速试验数据时,检测和评估各种应力源对电子设备影响的附加信息的可能性。考虑了两种方法-标准方法,具有一个固定的应力因子,以及通过求解偏微分方程来估计影响的严重程度。
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引用次数: 1
IoT solution for monitoring of data in the visible and infrared spectrum 用于监控可见和红外光谱数据的物联网解决方案
Pub Date : 2020-09-16 DOI: 10.1109/ET50336.2020.9238289
V. Tsvetkov, G. Spasov, G. Petrova
In this paper a cost-effective combination between infrared and visible camera for thermal imaging applicable in Ambient Assisted Living (AAL) and object monitoring in smart homes is presented and demonstrated. In recent years, we have witnessed a rapid surge in assisted living technologies. Internet of Things (IoT) is a platform where every day devices become smarter, everyday processing becomes intelligent, and every day communication becomes informative. Our implementation is based on four layers IoT architecture. The user interface provides an option for manual adjustment of the image alignment from infrared and visible cameras. Apart from manual procedure, a procedure for the automatic alignment of the images of the both cameras have been developed. The time necessary for the image data processing by the microcontroller which gathers data from the sensors or by the gateway device is estimated.
本文提出并演示了一种适用于智能家居环境辅助生活(AAL)和物体监控的红外和可见光热成像相机的经济高效组合。近年来,我们目睹了辅助生活技术的迅速发展。物联网(IoT)是一个平台,在这个平台上,日常设备变得更加智能,日常处理变得更加智能,日常通信变得更加丰富。我们的实现基于四层物联网架构。用户界面提供了手动调整红外和可见光相机图像对齐的选项。除了手动程序外,还开发了两台相机图像的自动对准程序。估计了从传感器或网关设备收集数据的微控制器处理图像数据所需的时间。
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引用次数: 4
期刊
2020 XXIX International Scientific Conference Electronics (ET)
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