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2017 13th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)最新文献

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A small buoy for flux measurement in air-sea boundary layer 一种用于海气边界层通量测量的小型浮标
Zhao Chenbing, Wang Xinpeng, Li Xiyao, Zhang Suoping, W. Haitao
As the promising flux measure area is within the air-sea boundary layer, a flux buoy is a better choice. Generally, large vessels have to be used in these flux monitoring tasks with buoys. This paper describes a small buoy which is supported by national ocean technology center for flux measurement in air-sea boundary layer, capable of rapidly deployment and accurately measuring atmospheric and sea surface variables. It can be easily dissembled, carried, deployed and acquire meteorological and hydrological data, such as pressure, temperature and wind speed. The algorithm, which is based on the Monin-Obukhov similarity theory, the structure, which has an anti-rotation character, sensors installed on the buoy which have high accuracy and good stability and the process of the buoy control system are introduced in details. The buoy has been deployed in a sea area as a field test, and has a promising result. Compared to the traditional flux buoy, the small flux buoy is not only small and light in weight, and also can be used for flexible, low-cost and effective flux measurement. Besides, its low cost makes measurement in wide range possible. The buoy provides a new solution for air-sea flux monitoring and data source for flux model algorithm research.
由于有潜力的通量测量区域在海气边界层内,通量浮标是较好的选择。一般来说,在这些带有浮标的通量监测任务中,必须使用大型船只。本文介绍了由国家海洋技术中心支持的海气边界层通量测量小型浮标,该浮标能够快速部署并精确测量大气和海面变量。它可以很容易地拆卸、携带、部署和获取气象和水文数据,如压力、温度和风速。详细介绍了该算法基于Monin-Obukhov相似理论、具有抗旋转特性的结构、浮标上安装的精度高、稳定性好的传感器以及浮标控制系统的工作过程。该浮标已在某海域进行了现场试验,取得了良好的效果。与传统通量浮标相比,小型通量浮标不仅体积小、重量轻,而且可用于灵活、低成本、有效的通量测量。此外,它的低成本使大范围的测量成为可能。该浮标为海气通量监测提供了新的解决方案和通量模型算法研究的数据源。
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引用次数: 3
Classification and recognition of voltage sags based on KFCM — SVM 基于KFCM - SVM的电压跌落分类与识别
Mei Fei, Zhang Chenyu, Sha Haoyuan, Zheng Jianyong
Voltage sag is a serious power quality problem which has a profound effect on the electrical equipment and the users. Reliable data platform has been provided for real-time monitoring and scientific management of voltage sags by construction and development of on-line monitoring system. The valuable information extraction from massive data is an important problem that needs to be solved urgently. Sags classification and recognition by data mining are the effective means. The KFCM — SVM method proposed in this paper has the advantages as following: Firstly, reasonable classification and optimization of historical data can be realized by KFCM. Secondly, effective recognition of the voltage sag events is executed by SVM. Thirdly, the typical features are selected with high separability. The model, which is more suitable for online systems, is simple with small calculation. The effectiveness of this proposed method is verified by historical data modeling.
电压暂降是一个严重的电能质量问题,对电力设备和用户都有深远的影响。通过在线监测系统的建设和开发,为电压跌落的实时监测和科学管理提供了可靠的数据平台。从海量数据中提取有价值的信息是一个迫切需要解决的重要问题。利用数据挖掘对sag进行分类和识别是有效的手段。本文提出的KFCM - SVM方法具有以下优点:首先,通过KFCM可以实现对历史数据的合理分类和优化。其次,利用支持向量机对电压暂降事件进行有效识别。第三,选取具有高可分性的典型特征。该模型简单,计算量小,更适用于在线系统。通过历史数据建模验证了该方法的有效性。
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引用次数: 1
The comparison of optimizing SVM by GA and grid search 基于遗传算法和网格搜索优化支持向量机的比较
S. Yuanyuan, Wang Yongming, Guo Lili, Ma Zhongsong, Jin Shan
As we known, SVM is fit for the application of fault diagnosis. In our paper, we discussed the optimization methods for SVM. Including GA, Grid Search, and K-fold Cross Validation. For optimizing SVM, it is necessary to find out the best kernel function, to pick out the best kernel parameters and penalty factor parameters. Here, the standard datasets of UCI is used to illustrate the optimization effect by GA and Grid Search. The experiment environment is Matlab 2014a, the library of libsvm is adopted. The results can be seen that the Grid Search method has better performance than genetic algorithm in this circumstance.
我们知道,支持向量机适合于故障诊断的应用。本文讨论了支持向量机的优化方法。包括遗传算法,网格搜索,和K-fold交叉验证。对支持向量机进行优化,需要找出最优的核函数,选择最优的核参数和惩罚因子参数。本文以UCI的标准数据集为例,说明了遗传算法和网格搜索的优化效果。实验环境为Matlab 2014a,采用libsvm库。结果表明,在这种情况下,网格搜索方法比遗传算法具有更好的性能。
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引用次数: 28
Sensitivity study of a polarization imaging-based target detection system 基于偏振成像的目标检测系统灵敏度研究
Gumilar Langlang, Zhang Zhen, Sun Qiyao, Wang Huibin
Polarization detection has become a useful complement to traditional optical detection techniques because of its robustness to ambient disturbances. However the uncertainties of sensitive factors such as observation geometry and imaging band limit the practical use of polarization imaging in target detection. To study its sensitivity, two target detection experiments of stealth and camouflage tank models under sand and grass background are conducted. Results show that, the Q component calculated by the differential operation of 0° and 90° polarized images provides the largest polarization contrast between target and background than other components. Finally the optimal configuration of polarization imaging-based target detection system is determined and verified by measuring polarization contrast of Q component under different azimuth and inclination of light source and camera, as well as four imaging bands within visible spectrum.
偏振检测因其对环境干扰的鲁棒性而成为传统光学检测技术的有益补充。然而,观测几何和成像波段等敏感因素的不确定性限制了偏振成像在目标探测中的实际应用。为了研究其灵敏度,进行了沙地和草地背景下隐身坦克和伪装坦克模型的目标检测实验。结果表明,0°和90°偏振图像的微分运算计算的Q分量比其他分量提供了最大的目标和背景之间的偏振对比度。最后,通过测量光源和相机在不同方位和倾角下Q分量的偏振对比度,以及可见光谱内的四个成像波段,确定了基于偏振成像的目标检测系统的最佳配置,并对其进行了验证。
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引用次数: 0
Design and implementation of high-speed server based on dynamic thread pool 基于动态线程池的高速服务器的设计与实现
Linfeng He, G. Yuhai, Juyuan Wang
Because there are lots of wind generating sets in large wind farms, real-time monitoring and diagnosis of each point should be carried out in real time. Large amounts of real-time monitoring data need to be sent to the data server, and provides monitoring data for the visual client. it puts forward a high requirement to the real-time capability and data throughput of the data server. Dynamic thread pool can be applied to the high speed data server software system of large fan monitoring and diagnosis system. The dynamic thread pool method is used to solve the high concurrency problems in the data server. According to the experiment, the dynamic thread pool method is more efficient than traditional thread pool.
由于大型风电场的风力发电机组数量较多,需要对各点进行实时监测和诊断。需要将大量的实时监控数据发送到数据服务器,为可视化客户端提供监控数据。这对数据服务器的实时性和数据吞吐量提出了很高的要求。动态线程池可以应用于大型风机监测诊断系统的高速数据服务器软件系统。采用动态线程池方法解决数据服务器的高并发性问题。实验表明,动态线程池方法比传统的线程池方法效率更高。
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引用次数: 1
A novel design of fully connected communication network for Bio-inspired hardware 仿生硬件全连接通信网络的新设计
Liu Xiubin, Li Yue, Qian Yanling, Zhuo Qingqi, Yin Su
This paper presents a novel design of fully connected communication network for Bio-inspired Electronic Array. The network mainly comprises neighbor connection, bus connection and NoC network. Neighbor connection and NoC network are used to transfer computing results of adjacent and nonadjacent electronic cells, respectively. Bus connection is responsible for self-repairing. In order to avoid conflict, Round-Robin algorithm and a polling arbiter is used to arbitrate. Meanwhile, we design a 4×4 multiplier based on this architecture. The experimental verify the fully connected communication ability.
提出了一种新型仿生电子阵列全连接通信网络的设计方案。网络主要包括邻居连接、总线连接和NoC网络。采用相邻连接和NoC网络分别传输相邻和非相邻电子单元的计算结果。母线连接负责自我修复。为了避免冲突,采用轮循算法和轮询仲裁器进行仲裁。同时,我们在此基础上设计了一个4×4乘法器。实验验证了全连接通信能力。
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引用次数: 4
A passive MMW radiometric image feature extraction for security inspection 一种用于安检的被动毫米波辐射图像特征提取方法
Zhang Guangfeng, Yu Changchang
For application of security inspection, the passive millimeter wave (MMW) radiometric transferring model is presented in the indoor experiments. A simulation imaging experiment to the human body with concealed metal objects was done by using 3mm waveband alternating current radiometer. A feature extraction method for millimeter wave radiometric image is also proposed based on morphology and contour method. The results show that the contour processing method can overcome the disadvantage of untrue edge phenomenon in traditional differential edge extraction method and the features extracted of objects are more conformed to the geometrical characteristics of concealed metals.
为了应用于安全检测,在室内实验中提出了无源毫米波辐射传递模型。利用3mm波段交流辐射计进行了隐藏金属物体对人体的模拟成像实验。提出了一种基于形态学和轮廓法的毫米波辐射图像特征提取方法。结果表明,该轮廓处理方法克服了传统差分边缘提取方法存在不真实边缘现象的缺点,提取的目标特征更符合隐蔽金属的几何特征。
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引用次数: 1
Development on-line gas flow calibration system based on piston prover 开发了基于活塞测试仪的在线气体流量校准系统
L. Jinhua, Zhang Yanni, Z. Xiaofeng, Ning Zhanwu, Liu Ning, Z. Jingjing
This paper developed an on-line gas flow calibration system based on piston prover. The principle of clearance-seal was introduced briefly, and then the realization of the piston prover based on clearance-seal was discussed in detail. According to the experimental results, the repeatability and precision was superior to the soap film flow meter. Within the range of 5-500 sccm, the testing relative error is less than 1%o, which indicates the high precision of the device. In addition, with the advantages of high degree of automation and outstanding reliability, this calibration system could be widely applied to various fields of on-line and off-line gas flow calibration.
本文开发了一种基于活塞测试仪的在线气体流量标定系统。简要介绍了间隙密封原理,详细讨论了基于间隙密封的活塞验证器的实现。实验结果表明,该方法的重复性和精密度均优于皂膜流量计。在5 ~ 500 sccm范围内,测试相对误差小于1%,表明该装置具有较高的精度。此外,该校准系统具有自动化程度高、可靠性突出等优点,可广泛应用于在线和离线气体流量校准的各个领域。
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引用次数: 0
Research on the Pearson correlation coefficient evaluation method of analog signal in the process of unit peak load regulation 机组调峰过程中模拟信号的Pearson相关系数评价方法研究
Xia Zhi, Song Yuexin, Ma Jin, Zhou Lujie, Dong Zijian
Deep peak-regulating is a new requirement to thermal power unit, and the evaluation of peak load regulation performance is an important part of it. The national development and reform commission and the national energy administration proposed to strengthen the capacity building of peak load regulation and improve system flexibility. In response to the national policy, a power generation group proposed a new requirement for thermal power flexibility. It puts forward higher requirements for the range of the unit's wide load and the variable load rate. The main evaluation methods of analog signals are the mean variance method and minimum variance method. Pearson correlation coefficient method is a way to evaluate the correlation between two variables in the field of statistics. By studying the Pearson correlation coefficient method in the field of statistics, it is applied to evaluate the analog signals in the process of peak load regulation as a new evaluation method. By extracting simulation machine operation data and analyzing the curve characteristics, the evaluation results of curves were obtained, and validated the feasibility and effectiveness of the Pearson correlation coefficient method in evaluating the analog signals in the process of deep peak-regulating.
深度调峰是对火电机组的新要求,调峰性能评价是其中的重要组成部分。国家发展改革委、国家能源局提出,要加强调峰能力建设,提高系统灵活性。为响应国家政策,某发电集团对火电灵活性提出了新的要求。对机组的宽负荷范围和可变负荷率提出了更高的要求。模拟信号的评价方法主要有均值方差法和最小方差法。皮尔逊相关系数法是统计领域中评价两个变量之间相关性的一种方法。通过研究统计学领域的Pearson相关系数法,将其作为一种新的评价方法应用于调峰过程中模拟信号的评价。通过提取模拟机运行数据,分析曲线特征,得出曲线的评价结果,验证了Pearson相关系数法在深度调峰过程模拟信号评价中的可行性和有效性。
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引用次数: 24
Building vibration measurement with double magnetic suspension vibrators based on wavelet analysis 基于小波分析的双磁悬浮振动器建筑物振动测量
Jiang Dong, Zhang Zhengnan, Liu Xukun, Kong Deshan, Wang Deyu
In order to measure the vibration of the building generated by large infrastructure equipments, magnetic levitation technique was used. A vibration measurement model with double magnetic suspension vibrators was designed. The function of magnetic repulsion and displacement of the vibrator was obtained by means of the measured and least squares function fitting method. The vibration equations of the two magnetic suspension vibrators were deduced respectively. A simulation model of vibration measurement system with double magnetic suspension vibrators was established. The simulation shows that the sensitivity of the double magnetic suspension vibrators is higher than that of the single magnetic suspension vibrator. When these large infrastructure equipment work, the vibrations of the building were measured. The data components of the vibration signals were analyzed by wavelet decomposition method. Finally, the free vibration waveform of the buildings, the vibration waveform of the building generated by excavators and forklifts were reconstructed. The experimental results show that the magnetic levitation measurement method is suitable for low frequency vibration measurement and its measurement sensitivity is higher. The method can be used to assess the level of vibration generated by large infrastructure equipments.
为了测量大型基础设施设备对建筑物产生的振动,采用了磁悬浮技术。设计了双磁悬浮振子的振动测量模型。采用实测和最小二乘函数拟合的方法,得到了振动子的磁斥力和位移函数。分别推导了两种磁悬浮振子的振动方程。建立了双磁悬浮振子振动测量系统的仿真模型。仿真结果表明,双磁悬浮振子的灵敏度高于单磁悬浮振子。当这些大型基础设施设备工作时,测量建筑物的振动。采用小波分解方法对振动信号的数据分量进行分析。最后对建筑物的自由振动波形、挖掘机和叉车对建筑物产生的振动波形进行了重构。实验结果表明,磁悬浮测量方法适用于低频振动测量,且测量灵敏度较高。该方法可用于大型基础设施的振动水平评估。
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引用次数: 1
期刊
2017 13th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)
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