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2018 International Electrical Engineering Congress (iEECON)最新文献

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Elimination of Multi-Bounce Effect for Outdoor RCS Measurement via 3D Imaging 利用三维成像消除室外RCS测量中的多重弹跳效应
Pub Date : 2018-03-01 DOI: 10.1109/IEECON.2018.8712315
Jun Shi, Ling Pu, Xiaoling Zhang
The outdoor RCS measurement technique is crucial for the radar and aeronautical design applications, especially in the face of large objects. Because of the background interference, the multi-bounce effect is unavoidable and will contaminate the measuring result greatly. In this paper, a novel method to eliminate the multi-bounce effect via 3D imaging technique is proposed. Compared with the traditional methods, high-resolution 3D microwave image can separate the desired image from the multi-bounce false images in the image domain by using the difference of the transmission paths. Simulation results show that this method can clearly eliminate the multi-bounce effect of the outdoor RCS measurement.
室外RCS测量技术对于雷达和航空设计应用至关重要,特别是在面对大型物体时。由于背景干扰,多弹效应不可避免,会严重影响测量结果。本文提出了一种利用三维成像技术消除多重弹跳效应的新方法。与传统方法相比,高分辨率三维微波图像利用传输路径的不同,可以在图像域内将期望图像与多反弹假图像分离开来。仿真结果表明,该方法能明显消除室外RCS测量的多重弹跳效应。
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引用次数: 0
AU Automatic Car-Parking Modeling System AU自动停车建模系统
Pub Date : 2018-03-01 DOI: 10.1109/IEECON.2018.8712178
Narong Aphiratsakun, Lam Thanh Duy, J. Kongthon
This article presents the AU Automatic Car-Parking Modeling System, hereafter referred to as the AU-CPS. The AU-CPS is a model of an automatic parking system controlled by PLC. It interacts with the user via HMI, driven by three DC motors with the use of photo-electric sensors. A crane is used to lift and take the car from an initial to parking slot and from a parking slot to the exit way. The AU-CPS also shows whether parking is full or not by turning on an LED, and it uses sensors to detect the car in the slot to avoid overlapping in each slot.
本文介绍了AU自动停车建模系统,以下简称AU- cps。AU-CPS是一种由PLC控制的自动泊车系统模型。它通过人机界面与用户交互,由三个直流电机驱动,使用光电传感器。起重机用于将汽车从起始位置提升到泊位,并从泊位提升到出口通道。AU-CPS还可以通过打开LED来显示停车位是否满了,并使用传感器来检测车位内的车辆,以避免每个车位重叠。
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引用次数: 0
Arc Flash Hazard Assessment in Medium Voltage Switchgear: A Case Study in Cement Plant 中压开关柜电弧闪蒸危害评价:以水泥厂为例
Pub Date : 2018-03-01 DOI: 10.1109/IEECON.2018.8712196
Chaninun Yoddee, W. Kanokbannakorn, Siwapon Srisonpan
This paper presents the procedures for performing arc flash hazard assessment in medium voltage switchgear. A cement plant is used as an example to demonstrate the assessment procedures. The results shown that the assessment should consider the operating conditions of the system, to ensure the arc flash hazard level. The contribution of generator changes the short circuit current, which in turn changes the operating time of the protective relays. This results in the significance of increase in the incidentl energy and hazard level at switchgear.
本文介绍了中压开关设备电弧闪蒸危害评估的程序。以某水泥厂为例,说明了评价方法。结果表明,评价时应考虑系统的运行条件,以保证电弧闪蒸的危害等级。发电机的贡献改变了短路电流,从而改变了保护继电器的工作时间。这导致了开关设备的意外能量和危险水平的显著增加。
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引用次数: 0
Atmospheric Argon Plasma Jet for Post-Treatment of Biotreated Landfill Leachate 常压氩等离子体射流处理垃圾渗滤液
Pub Date : 2018-03-01 DOI: 10.1109/IEECON.2018.8712320
S. Theepharaksapan, K. Matra
Post-treatment of biotreated landfill leachate by atmospheric non-thermal plasma jet was proposed. A parallel operation of three atmospheric non-thermal argon plasma jets was applied for leachate treatment with water sample in strong acidic condition $(mathbf{pH} < 2)$. Three cases with different gap distances for 1.5, 3 and 4.5 cm were employed with a $4.5 mathbf{kV}_{text{rms}}$ 50 Hz AC neon sign transformer power source for 60 minutes. In this time, the influence of electrode gap distance $(text{G}_{text{d}})$ of argon plasma jet on the degradation of refractory organic compounds in biotreated landfill leachate was observed. Some key parameters of water quality including pH, DO, temperature, COD and the macromolecules, such as humic and fulvic substances, were measured before and after treatment. The result showed that the maximum removal of COD (33.9%), fulvic (53.3 %), humic (32.2%), and visible humic substances (57.2%) was found with the operating condition in 4.5 cm $text{G}_{text{d}}$ case. It could be confirmed that atmospheric non-thermal Ar plasma had the potential to effectively reduce the refractory organic compounds in wastewater which could be exploited for post-treatment of biotreated landfill leachate.
提出了常压非热等离子体射流对垃圾渗滤液进行后处理的方法。采用三种常压非热氩等离子体射流并联操作,对强酸性条件下的水样$(mathbf{pH} < 2)$进行渗滤液处理。使用$4.5 mathbf{kV}_{text{rms}}$ 50 Hz交流霓虹灯变压器电源,使用3个不同间距为1.5、3和4.5 cm的箱体60分钟。本文考察了氩等离子体射流电极间隙距离$(text{G}_{text{d}})$对生物处理后垃圾渗滤液中难降解有机物的影响。测定了处理前后的pH、DO、温度、COD等关键水质参数和腐殖质、腐殖质等大分子物质。结果表明,在4.5 cm $text{G}_{text{d}}$的工况下,COD去除率最高(33.9%),腐殖质去除率最高(53.3%),腐殖质去除率最高(32.2%),可见腐殖质去除率最高(57.2%)。结果表明,常压非热氩等离子体具有有效还原废水中难降解有机物的潜力,可用于生物处理垃圾渗滤液的后处理。
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引用次数: 1
Stablizied and Rotating Mechanism of 2D Laser Scanner for 3D Point Cloud Reconstruction 二维激光扫描仪用于三维点云重建的稳定和旋转机理
Pub Date : 2018-03-01 DOI: 10.1109/IEECON.2018.8712339
P. Prempraneerach, Thanapong Usupan
This research presents a stabilizing and rotating mechanism for laser scanner; thus 3D cloud points could be reconstructed. Design and development of a vertical scanning system and a roll-motion stabilizing system for laser point-cloud data, measured radial distance horizontally, are implemented. By using an encoder to feedback a roll angle, the first DC servo motor with a PI controller can assist stabilizing horizontal point-cloud data. A four-bar linkage mechanism, driven by the second DC motor and controlled by a feedforward controller with Inertial Measurement Unit (IMU) pitch-angle feedback, could generate $pmb{pm 16.5^{circ}}$ up-and-down pitching motion of the laser scanner. Both digital feedback controllers of two motors are developed in an Arduino microcontroller. Kinematics model of the four-bar linkage mechanism are derived and simulated for a design purpose. Experimental tests of the first motor, controlled by the PI-controller, reveal robustness against external-force disturbances, acting on the laser scanner, and demonstrate a roll-motion counterweight of the mechanism base. In additions, experiments of the second motor with the feedforward controller can compensate for gravity to achieve periodical cycles of the four-bar linkage motion. Reconstructed 3D point-cloud surface from laser 2D cloud points can provide accurate horizontal width and smooth-continuous height of measured indoor wall.
本研究提出了一种激光扫描仪的稳定旋转机构;从而可以重建三维云点。实现了激光点云数据垂直扫描系统和滚动稳定系统的设计与开发。通过使用编码器来反馈滚转角度,第一个带有PI控制器的直流伺服电机可以帮助稳定水平点云数据。由第二直流电机驱动的四杆连杆机构,由具有惯性测量单元(IMU)俯仰角反馈的前馈控制器控制,可产生$pmb{pm 16.5^{circ}}$上下俯仰运动。两个电机的数字反馈控制器都是在Arduino微控制器上开发的。推导了四杆机构的运动学模型,并对其进行了仿真。由pi控制器控制的第一台电机的实验测试表明,该电机对作用在激光扫描仪上的外力干扰具有鲁棒性,并演示了机构基座的滚动运动配重。此外,利用前馈控制器对第二电机进行实验,可以补偿重力,实现四杆机构运动的周期性循环。由激光二维云点重建三维点云面,可提供测量室内墙体的精确水平宽度和平滑连续高度。
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引用次数: 0
Battery Monitoring System for DC Distribution in a Substation Using Travelling Wave Theory 基于行波理论的变电站直流配电电池监测系统
Pub Date : 2018-03-01 DOI: 10.1109/IEECON.2018.8712299
Kiadtisak Nakjuy, S. Khomfoi
Battery monitoring system for dc distribution applying in a substation is presented in this paper. Both MEA and PEA substation uses lead acid type batteries for a de distribution using as a backup source. Therefore, a battery monitoring is a key function in a charger to check battery condition; however, a traditional charger used in a substation does not have this function. A lead acid battery first order equivalent circuit is utilized to analyze the battery condition by probing an internal resistance of a battery. A first order equivalent circuit is used to determined battery parameters using transient response analysis. PSIM is also used to simulate the proposed equivalent circuit properties comparing to experimental result. The experimental results are conducted by using three lead acid batteries which are used in a PEA substation. The travelling wave theory is also applied to determine the health of under tested batteries. Both simulation and experimental results show that the proposed technique is promising technique to implement in a charger function for detecting a battery condition as a proactive maintenance.
介绍了变电站直流配电蓄电池监测系统。MEA和PEA变电站都使用铅酸型电池作为配电备用电源。因此,电池监测是充电器检查电池状态的关键功能;然而,变电站中使用的传统充电器不具有此功能。利用铅酸电池一阶等效电路,通过探测电池内阻来分析电池状态。采用一阶等效电路,通过暂态响应分析确定电池参数。利用PSIM对所提出的等效电路特性进行了仿真,并与实验结果进行了比较。以某PEA变电站中使用的三节铅酸蓄电池为实验对象进行了实验研究。行波理论也被用于确定待测电池的健康状况。仿真和实验结果表明,该技术是一种很有前途的技术,可以实现在充电器功能中检测电池状态作为主动维护。
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引用次数: 3
Experimental Investigation of Electrical Discharge Plasma in Air Microbubbles Water Mixture 空气微泡水混合物中放电等离子体的实验研究
Pub Date : 2018-03-01 DOI: 10.1109/IEECON.2018.8712338
C. Dechthummarong
This research focused on studying a DC plasma discharge underwater with mixed high-density of air micro-bubbles water by experimental research for generating of free radicals and highly chemically active species in the activated water. The simple laboratory-made high voltage DC power supply based on half wave rectifier of voltage doubler circuit of 12 kVp. A point-to-point electrode setup was immersed in the water. Electrical DC-discharge plasma though micro air-bubbles water was investigated by current and voltage probe. The yields from electrical discharge plasma in the water were measured by detecting of pH, conductivity, ozone (O3), nitrate (NO3-), and hydrogen peroxide (H2O2). During underwater discharge plasma with mixture of micro air-bubbles in water condition, the maximum voltage and current were applied approximately 5 kVp and 1 Ap, respectively. The chemically reactive species concentrations of water were measured as a function of treatment time for 4 minutes. The results shown that O3, H2O2 and N03-obtained more than 5 mg/L, 25 mg/L, and 90 mg/L, respectively. Moreover, the discharge plasma with the air micro-bubbles water presented significantly correlation between chemical active species production and the input energy transfer.
本研究重点研究了高密度空气微泡水水下直流等离子体放电,通过实验研究了活性水中自由基和高化学活性物质的生成。基于12 kVp倍压电路半波整流器的简易实验室制高压直流电源。将点对点电极装置浸入水中。用电流和电压探头研究了直流放电等离子体通过微气泡水的过程。通过测定水中的pH、电导率、臭氧(O3)、硝酸盐(NO3-)和过氧化氢(H2O2)来测定放电等离子体的产率。在水中条件下,混合微气泡水下放电等离子体时,施加的最大电压和电流分别约为5 kVp和1 Ap。测定水中化学反应物质浓度随处理时间的变化情况,处理时间为4分钟。结果表明,O3、H2O2和n03的浓度分别大于5 mg/L、25 mg/L和90 mg/L。此外,放电等离子体与空气微泡水的化学活性物质产生与输入能量传递呈显著相关。
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引用次数: 0
Human Computer Interaction and Usability Engineering of Thai Word Search Keyboard Application for Students with Learning Disabilities 学习障碍学生泰语搜索键盘应用的人机交互与可用性工程
Pub Date : 2018-03-01 DOI: 10.1109/ieecon.2018.8712193
Onintra Poobrasert, Thaphat Mupattararot
Human-Computer Interaction is a study of focusing on the design of computer technology, in particular, the interaction between the users and computers. Consequently, it is important especially when designing and developing a tool such as assistive technology tool for students with learning disabilities. Assistive technology is a tool that helps increase potential or improve capability of exceptional students, so that they will have more learning potential and hence they can study effectively. In addition, assistive technology can be used as a tool by teachers to facilitate learning management and provide learning opportunity to students. A Thai Word Search Keyboard Application was developed to help students with writing and spelling disabilities to be able to select the right vocabularies. Thai Word Search Keyboard Application, which was still a lab prototype, was tested for performance with teachers and related persons who had ever worked with students with learning disabilities. The researchers use a heuristic evaluation in this study. The evaluation result from functional requirement and usability tests was at a high level, while the result from functional tests was at a moderate level. Those results would be a guideline for improving the next version of Thai Word Search Keyboard Application.
人机交互是一门专注于计算机技术设计的研究,特别是用户与计算机之间的交互。因此,在为有学习障碍的学生设计和开发诸如辅助技术工具等工具时,这一点尤为重要。辅助技术是一种帮助特殊学生增加潜力或提高能力的工具,使他们有更多的学习潜力,从而有效地学习。此外,辅助技术可以作为教师方便学习管理的工具,为学生提供学习机会。开发了一个泰语单词搜索键盘应用程序,以帮助有写作和拼写障碍的学生能够选择正确的词汇。泰语单词搜索键盘应用程序,仍然是一个实验室的原型,测试性能的教师和相关人员曾经与学习障碍的学生工作。研究人员在本研究中使用了启发式评估法。功能需求和可用性测试的评价结果处于较高水平,而功能测试的评价结果处于中等水平。这些结果将为改进下一个版本的泰语单词搜索键盘应用程序提供指导。
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引用次数: 0
Target Setting of Power System Reliability Indices with Consideration of Maintenance Cost and Relevant Factors 考虑维护成本及相关因素的电力系统可靠性指标目标设定
Pub Date : 2018-03-01 DOI: 10.1109/IEECON.2018.8712337
Amorn Chamanghatthaphong, S. Chaitusaney
Target setting of power system reliability indices should consider the factors that affect to reliability. Also, there should be the quick way to get the index targets in order to be able to set up maintenance activities and to plan improvement of the power system, it is possible to reach the target in time. In this paper, preventive maintenance cost and line length are considered. Furthermore, the methods presented multiple linear regression and simple linear regression. The test results show that the analysis method can be used to set the targets quickly and in accordance with the factors taken into consideration.
电力系统可靠性指标的目标设定应考虑影响可靠性的因素。此外,还应该有快速获得指标目标的方法,以便能够建立维护活动并计划电力系统的改进,从而有可能及时达到目标。本文考虑了预防性维护费用和线路长度。采用多元线性回归和简单线性回归两种方法。试验结果表明,该分析方法可以根据所考虑的因素快速确定目标。
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引用次数: 0
Performance of the Module Temperature Model in Forecasting the Power Output of Photovoltaic Systems 组件温度模型在光伏系统输出功率预测中的性能
Pub Date : 2018-03-01 DOI: 10.1109/IEECON.2018.8712317
P. Dawan, Kaweepoj Worranetsuttikul, Songkiate Kittisontirak, K. Sriprapha, W. Titiroongruang, Surasak Niemcharocn
This paper is the study the performance of the temperature model in forecasting the power output of photovoltaic systems. The prominent point of the solar power forecasting model was to use only one input parameter (solar irradiance). Solar irradiance was injected into the temperature model using mathematic equations. The output of temperature model and the solar irradiance was used by the solar power forecasting model for forecasting the power output of the photovoltaic systems. The results shows that the effectiveness of the temperature model had a discrepancy at 4.03%, which is acceptable.
本文研究了温度模型在光伏系统输出功率预测中的性能。该模型的优点是只使用一个输入参数(太阳辐照度)。利用数学方程将太阳辐照度注入温度模型。太阳能发电预测模型利用温度模型和太阳辐照度的输出来预测光伏发电系统的输出功率。结果表明,温度模型的有效性偏差为4.03%,可以接受。
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引用次数: 1
期刊
2018 International Electrical Engineering Congress (iEECON)
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