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2013 Third International Conference on Instrumentation, Measurement, Computer, Communication and Control最新文献

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Application of the Sato Blind Deconvolution Algorithm for Correction of the Gravimeter Signal Distortion 佐藤盲反卷积算法在重力仪信号畸变校正中的应用
Zhao Li-ye, Lin Hongsheng
Strong damping and large time constant is the common characteristics of marine gravity meter, in which they suppress vertical interference in the direction of the acceleration, but also result in distortion of the low-frequent gravity anomaly signals, such as amplitude attenuation and phase lag. Based on the principle of the gravimeter and the distortion of measured signals, measured distortion signals of the gravimeter can be approximately taken as the result of gravity signal convoluted with the unknown coefficients of the low-pass filter. Then, the single-channel Buss gang method based on the Sato algorithm is analyzed and used to correct the gravity anomaly distortion signal. Theoretical analysis and the result of emulations show that the correction algorithm based on the blind deconvolution can effectively eliminate the amplitude attenuation and phase lag of the gravity signal distortion and improve the accuracy of the gravity anomaly.
强阻尼和大时间常数是海洋重力仪的共同特点,在抑制加速度方向上的垂直干扰的同时,也会造成低频重力异常信号的振幅衰减和相位滞后等畸变。根据重力仪的工作原理和测量信号的畸变,重力仪的测量畸变信号可以近似地理解为重力信号与低通滤波器的未知系数进行卷积的结果。然后,分析了基于Sato算法的单通道Buss gang方法,并将其用于重力异常畸变信号的校正。理论分析和仿真结果表明,基于盲反褶积的校正算法能有效消除重力信号失真的幅度衰减和相位滞后,提高重力异常的精度。
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引用次数: 2
Design of Multi-channel PCI Data Acquisition System Based on the SOPC 基于SOPC的多通道PCI数据采集系统设计
Huaiming Wu, Weiguo Geng, Shanbo Zhou, Shuting Kang
In present industrial field, the high-speed data acquisition system with small size, high-accuracy and multi-gain choices is badly needed. This paper presents a realizing solution of a parallel PCI high-speed data acquisition system for universal multi-channel based on the SOPC. With this system, we can either use these 12 channels together or choose combination. Meanwhile, the gain-programmed amplifier can also be selected as well as difference or single-ended parallel input way. Also, the sampling rate of the multi-channel can reach at the same time up to 200KSa/s, and the vertical resolution of the high-accuracy PCI data acquisition module is 16bit.
在目前的工业领域,迫切需要体积小、精度高、多增益选择的高速数据采集系统。提出了一种基于SOPC的通用多通道并行PCI高速数据采集系统的实现方案。在这个系统中,我们可以同时使用这12个通道,也可以选择组合使用。同时,也可以选择增益编程放大器以及差分或单端并联输入方式。多通道采样率可同时达到200KSa/s,高精度PCI数据采集模块垂直分辨率为16bit。
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引用次数: 0
Large Capacity Airborne Waveform Recorder for UWB System Based on FPGA and Flash Array 基于FPGA和Flash阵列的UWB系统大容量机载波形记录仪
Wang Xing, Mai Chaoyun, Wang Jun, Sun Jinping
This paper presents the design and realization of a large capacity airborne waveform recorder for UWB (ultra wide band) system based on FPGA and Flash array. The system has 80 MT29F64G08AJABA NAND Flash Memory chips and provides a total 640GB storage capacity. With ADC working at 100MHz, the storage time can be more than 100 minutes. For offline data analysis, the system provides a Gigabit interface to PC, and the data rate can reach 25MB/s. This device also can be applied in other measurement instruments and systems. The system structure, implementation and test results are described in detail.
介绍了一种基于FPGA和Flash阵列的机载超宽带系统大容量波形记录仪的设计与实现。该系统拥有80个MT29F64G08AJABA NAND闪存芯片,总存储容量为640GB。ADC工作在100MHz时,存储时间可超过100分钟。对于离线数据分析,系统提供千兆接口到PC机,数据速率可达25MB/s。该装置也可用于其它测量仪器和系统。详细介绍了系统的结构、实现和测试结果。
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引用次数: 1
A Novel Two-Dimensional Channel Estimation Algorithm for SC-FDE Systems 一种新的SC-FDE系统二维信道估计算法
Qifeng Zou, Xuezhi Tan, Mei Liu, Yang Yu
A novel time-frequency domain two-dimensional MMSE channel estimation (2D-MMSE) algorithm based on separation property of mobile wireless channels is proposed in this paper in order to provide the current channel state knowledge and improve the spectral efficiency in Single Carrier Frequency Domain Equalization (SC-FDE) systems over frequency-selective channels. We use the Unique Word (UW) to be the cyclic prefix and the pilot just like IEEE802.16. The UW is not need to delete in receiver, so the overhead of system is low. The 2D-MMSE estimation is simplified as an MMSE interpolation in the frequency domain cascaded by an MMSE filter in the time domain. The SVD method is adopt to reduce the complexity and keep the estimation accuracy. We also make the noise variance estimation by UW. Finally, the simulation results show that the proposed algorithm has better performance than the LS and MMSE algorithms, and the complexity of our method is lower than traditional one-dimensional MMSE.
为了提供当前信道状态信息,提高单载波频域均衡(SC-FDE)系统在选频信道上的频谱效率,提出了一种基于移动无线信道分离特性的时频域二维MMSE信道估计算法。我们使用唯一字(UW)作为循环前缀和导频,就像IEEE802.16一样。在接收端不需要删除UW,因此系统开销低。将2D-MMSE估计简化为在频域进行MMSE插值,在时域进行MMSE滤波器级联。采用奇异值分解方法降低了估计复杂度,保证了估计精度。我们还用UW估计了噪声方差。仿真结果表明,该算法比LS和MMSE算法具有更好的性能,且复杂度低于传统的一维MMSE算法。
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引用次数: 1
Ways to Improve Temperature Measurement Accuracy of InfraScope Thermal Mapper 提高红外热成像仪测温精度的途径
Zhai Yuwei, Liang Fa-guo, Zhen ShiQi, Wu Aihua, Qiao Yue
In this paper we discuss the ways to improve the accuracy of InfraScope Thermal Mapper. We demonstrate the theory about space resolution and how it influences the temperature measurement using InfraScope Thermal Mapper. Then a way to enhance the accuracy by choosing the space resolution adequately is presented. Some experiments are designed and the results prove the way is effective. Then we study on the basic structures and work procedures of this instrument, combining with theory analysis we conclude an efficient emissivity measurement method. Following which we can measure emissivity at a single temperature. Then we analyze errors brought in by this method in emissivity calculation procedure, deliberately propose ways to improve on the measurement accuracy. At last, we verify the improvement by precise experiments.
本文讨论了如何提高红外热成像仪的精度。我们演示了空间分辨率的理论,以及它如何影响使用InfraScope热成像仪的温度测量。在此基础上提出了一种通过适当选择空间分辨率来提高精度的方法。设计了一些实验,结果证明了该方法的有效性。然后对该仪器的基本结构和工作过程进行了研究,并结合理论分析得出了一种有效的发射率测量方法。然后我们可以测量单一温度下的发射率。分析了该方法在发射率计算过程中带来的误差,提出了提高发射率测量精度的方法。最后,通过精确的实验验证了改进的正确性。
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引用次数: 0
A Generalized Augmented Gaussian Approximation Filter for Nonlinear Systems with Non-additive Correlated Noises 非加性相关噪声非线性系统的广义增广高斯逼近滤波器
Qian Hua-Ming, Huang Wei
Considering that nonlinear systems exist non-additive correlated noises, a generalized augmented Gaussian approximation filter (GAGAF) is proposed. The proposed filter makes use of the state augmented method to overcome the limitation of traditional nonlinear filters based on additive correlated noises. Based on the proposed filter framework, a novel augmented cubature Kalman filter with non-additive correlated noises (NACKF) can be developed through utilizing the spherical-radial cubature rule to computer the multi-dimensional integrals approximately. Simulation results validate the efficiency and feasibility of the proposed filter.
针对非线性系统中存在的非加性相关噪声,提出了一种广义增广高斯近似滤波器(GAGAF)。该滤波器利用状态增广方法克服了传统基于加性相关噪声的非线性滤波器的局限性。在该滤波框架的基础上,利用球-径向定形规则对多维积分进行近似计算,得到了一种新的非加性相关噪声增广定形卡尔曼滤波器。仿真结果验证了该滤波器的有效性和可行性。
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引用次数: 1
Moving-Mass Attitude Control of Hypersonic Vehicle Based on Fuzzy Tree 基于模糊树的高超声速飞行器动质量姿态控制
Zhen Zhang, Xiao-hong Sui, Yukun Wang, J. Mao
In this paper, Newton-Euler method is proposed to model the dynamic model for the moving-mass attitude of hypersonic vehicle and a coupled nonlinear system is obtained by reasonable simplification. A fuzzy tree inversion model is established to realize the decoupling and linearization of the three channels. For nonlinear system inversion error caused by modeling error and uncertainty, a closed-loop controller for each linear subsystem is designed to track attitude angle. Finally, the simulation results show that the control method is effective.
本文采用牛顿-欧拉法对高超声速飞行器的动质量姿态动力学模型进行建模,通过合理的简化得到一个耦合的非线性系统。建立了模糊树反演模型,实现了三通道的解耦和线性化。针对建模误差和不确定性引起的非线性系统反演误差,设计了各线性子系统的闭环控制器来跟踪姿态角。最后,仿真结果表明了该控制方法的有效性。
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引用次数: 1
An End-to-End QoS Guarantee Scheme in Heterogeneous Networks 异构网络中的端到端QoS保证方案
Heng Wang, Tao Du, Feng Ding, Y. Liu, Songhua Huang, Jun Tao
Nowadays, as the various applications emerge, to address the problem of the end-to-end QoS guarantee in the heterogeneous networks is becoming more and more important. Considering the communication between two nodes within a domain or cross-domain in the heterogeneous networks, we design the scheme of Signaling of Cross-domain QoS Cooperation in heterogeneous networks (SCQC). In SCQC, the SSE nodes can quickly establish the QoS path. To provide the end-to-end communication cross domain, a QoS parameter mapping rule in heterogeneous is designed. Then, we proposed the End-to-end SLA Negotiation algorithm based on the state of the Data Stream (ESNDS), which can effectively guarantee service end-to-end QoS by dynamically adjusting the level of service in different domains according to the current state of the data stream. Through the performance analysis and simulations, we evaluate the time to establish QoS path and end-to-end latency of service with our algorithm. The results prove the effectiveness and feasibility of the ESNDS in guaranteeing the end-to-end QoS in heterogeneous networks.
如今,随着各种应用的出现,解决异构网络中端到端的QoS保障问题变得越来越重要。针对异构网络中域内或跨域两个节点之间的通信问题,设计了异构网络中跨域QoS合作信令方案(SCQC)。在SCQC中,SSE节点可以快速建立QoS路径。为了提供端到端的跨域通信,设计了异构QoS参数映射规则。然后,我们提出了基于数据流状态的端到端SLA协商算法(ESNDS),该算法根据数据流的当前状态动态调整不同域的服务水平,有效地保证了服务端到端QoS。通过性能分析和仿真,评估了该算法建立QoS路径所需的时间和端到端服务延迟。结果证明了ESNDS在异构网络中保证端到端QoS的有效性和可行性。
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引用次数: 0
The Design of Greenhouse Automatic Control System Based on RS-485 Protocol 基于RS-485协议的温室自动控制系统设计
Haoran Zhang, Lijun Chen, Kun Liu, S. Du
Greenhouse control systems need to achieve three targets at the same time: low cost, high stability and the ability to implement complex control algorithm. Therefore, an automatic data acquisition and control system was designed based on RS-485 protocol in this paper. The system has three layers: the bottom layer consists of sensors and actuators, the middle layer is comprised of I/O nodes and the top layer is a main controller. An I/O node based on single chip microcomputer is responsible for executing commands of the main controller. The main controller based on ARM & Linux is in charge of scheduling of all commands. It controls temperature with hysteresis control algorithm. Firstly, the research status of hardware and topology structure was discussed, and their merits and drawbacks were found out. Secondly, an automatic data acquisition and control system was designed based on RS-485 protocol according to the needs of greenhouse control. Finally, the test process was analyzed and the running results were shown. This system was successfully used in our experimental greenhouse.
温室控制系统需要同时达到三个目标:低成本、高稳定性和实现复杂控制算法的能力。为此,本文设计了一种基于RS-485协议的自动数据采集与控制系统。该系统分为三层:底层由传感器和执行器组成,中间层由I/O节点组成,顶层是主控制器。一个基于单片机的I/O节点负责执行主控制器的命令。基于ARM和Linux的主控制器负责所有命令的调度。采用磁滞控制算法控制温度。首先,对硬件和拓扑结构的研究现状进行了讨论,找出了各自的优缺点。其次,根据温室控制的需要,设计了基于RS-485协议的自动数据采集与控制系统。最后,对测试过程进行了分析,给出了运行结果。该系统已成功地应用于我们的实验温室。
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引用次数: 0
Small Counter Bore Diameter Automatic Measurement System 小计数器内径自动测量系统
Yao Zhang, Xiaoya Liu
Deep hole diameter measurement questions are difficult at home and abroad, the current measurement method has the disadvantages of slow measuring speed and low precision. As the aperture decreasing, the measurement would be more difficult and the accuracy would be reduced. According to the above conditions, the noncontact measurement method based on the capacitance sensor is given out. The method can effectively improve the efficiency and accuracy of measurement. CCD combines with the 2-D micro-adjustment completes the function of precise positioning. Modular circuits make the signal integrity and accurate. LABVIEW software completes the function of controlling the system automatically, data acquisition and error correction. The experiments show that the scope of the whole system can be from Φ2.4mm to Φ7mm, the maximum resolution can be up to 0.5um, the highest precision can be up to 5um and linearity can be achieved 0.6018%. So the system can achieve nanometer measurement requirements.
深孔直径的测量是国内外的难题,目前的测量方法存在测量速度慢、精度低等缺点。孔径越小,测量难度越大,精度越低。根据上述条件,提出了基于电容传感器的非接触测量方法。该方法可有效提高测量效率和精度。CCD配合二维微调整完成精确定位功能。模块化电路使信号完整、准确。LABVIEW软件完成了系统自动控制、数据采集和纠错等功能。实验表明,整个系统的测量范围为Φ2.4mm ~ Φ7mm,最大分辨率可达0.5um,最高精度可达5um,线性度可达0.6018%。因此,该系统可以实现纳米级的测量要求。
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引用次数: 1
期刊
2013 Third International Conference on Instrumentation, Measurement, Computer, Communication and Control
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