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160 条记录 (耗时 0.028 秒)

    Methods for condition monitoring and system-level diagnosis of electro-mechanical systems with multiple actuating components operating in multiple regimes
    32.
    发明授权
    Methods for condition monitoring and system-level diagnosis of electro-mechanical systems with multiple actuating components operating in multiple regimes 有权

    公开(公告)号：US06539343B2

    公开(公告)日：2003-03-25

    申请号：US09497113

    申请日：2000-02-03

    申请人： Feng Zhao ,  Eric-J. Manders

    发明人： Feng Zhao ,  Eric-J. Manders

    IPC分类号： G06F1900

    CPC分类号： G06F17/148 ,  G05B23/0254

    摘要： The present invention discloses methods for condition-based monitoring of a system and its components using joint time-frequency analysis and signal demodulation. A first method allows construction of models of non-stationary signals having multiple time and frequency scales of interest. In particular, the method uses wavelet analysis to encode essential information in time-frequency transformations and provides a signal model for an operating fault or normal operation of a system of interest. A second method uses the signal models for condition-based monitoring to detect a change in a signal. In this method, the signal models are correlated with sensor signals to determine the operating condition of a system or system component. A third method for condition-based monitoring uses signal demodulation. In this method, a nominal response of a system component is subtracted from a detected signal to more reliably detect subtle changes in the signal due to component degradation.

    Microelectromechanical mechanisms for real-time mechanical vibration signature monitoring and analysis
    33.
    发明授权
    Microelectromechanical mechanisms for real-time mechanical vibration signature monitoring and analysis 有权
    用于实时机械振动特征监测和分析的微机电机构

    公开(公告)号：US06412131B1

    公开(公告)日：2002-07-02

    申请号：US09510366

    申请日：2000-02-22

    申请人： Feng Zhao ,  Andrew A. Berlin ,  Elmer S. Hung

    发明人： Feng Zhao ,  Andrew A. Berlin ,  Elmer S. Hung

    IPC分类号： G01H1108

    CPC分类号： G01N29/46 ,  G01H1/003 ,  G01H11/08 ,  G01L1/10 ,  G01L9/0019 ,  G01M7/025 ,  G01N29/14 ,  G01N29/38 ,  G01N29/4427 ,  G01N2291/014 ,  G01N2291/106

    摘要： A MEMS-based system that enables low cost, low power, single chip realization of real-time signal detection and fault diagnosis. The system is suitable for analyzing the time-varying properties of a signal that are important for condition-based monitoring of electro-mechanical machines or structures. The system includes mechanical sensors that sense input signals such as vibration, signal templates of fault conditions, logic units that detect, store, and compare signal features to provide a diagnostic state, and an output readout mechanism to couple the diagnostic state to readout device that provides an external signal.

    摘要翻译： 基于MEMS的系统，可实现低成本，低功耗，单芯片实现实时信号检测和故障诊断。 该系统适用于分析对于机电机械或结构进行基于状态监测的重要信号的时变特性。 该系统包括感测诸如振动，故障条件的信号模板，检测，存储和比较信号特征以提供诊断状态的逻辑单元的输入信号的机械传感器，以及将诊断状态耦合到读出装置的输出读出机构， 提供外部信号。

    Micromechanical discrete time and frequency characterization of signals via resonator clamping and motion-arresting mechanisms
    34.
    发明授权
    Micromechanical discrete time and frequency characterization of signals via resonator clamping and motion-arresting mechanisms 有权
    通过谐振器夹紧和运动拦截机制的信号的微机械离散时间和频率表征

    公开(公告)号：US06374677B1

    公开(公告)日：2002-04-23

    申请号：US09510367

    申请日：2000-02-22

    申请人： Andrew A. Berlin ,  Elmer S. Hung ,  Feng Zhao

    发明人： Andrew A. Berlin ,  Elmer S. Hung ,  Feng Zhao

    IPC分类号： G01M700

    CPC分类号： H03H9/2405 ,  H03H2009/02496 ,  H03H2009/02511

    摘要： A micromechanical resonator including a motion arresting mechanism to rapidly damp the vibration of a resonator beginning at any given moment in time to remove vibration caused by previous events. An electrostatic clamp uses a bias voltage between an electrode and the resonator to damp the resonator and return it to its equilibrium position. A mechanical clamp includes an actuator that forces the mechanical clamp to contact the resonator. These micromechanical resonators facilitate condition based monitoring of complex electromechanical machines and components by allowing signature analysis in multiple temporal and frequency domains.

    摘要翻译： 一种微机械谐振器，包括一个运动停止机构，用于在任何给定的时刻从快速衰减谐振器的振动，以消除先前事件引起的振动。 静电钳位器使用电极和谐振器之间的偏置电压来阻尼谐振器并将其返回到其平衡位置。 机械夹具包括促使机械夹具接触谐振器的致动器。 这些微机械谐振器通过允许在多个时域和频域进行签名分析来促进复杂机电机器和组件的基于条件的监视。

    Automated classification pipeline tuning under mobile device resource constraints
    37.
    发明授权
    Automated classification pipeline tuning under mobile device resource constraints 有权
    在移动设备资源约束下自动分类流水线调优

    公开(公告)号：US09020871B2

    公开(公告)日：2015-04-28

    申请号：US12818877

    申请日：2010-06-18

    申请人： Nicholas D. Lane ,  David Chiyuan Chu ,  Jing Zhao ,  Feng Zhao

    发明人： Nicholas D. Lane ,  David Chiyuan Chu ,  Jing Zhao ,  Feng Zhao

    IPC分类号： G06N99/00 ,  G06K9/00

    CPC分类号： G06N99/005 ,  G06K9/00973

    摘要： An architecture and techniques to enable a mobile device to efficiently classify raw sensor data into useful high level inferred data is discussed. Classification efficiency is achieved by tuning the mobile device's raw sensor data classification pipeline to attain a balance of accuracy, latency and energy suitable for mobile devices. The tuning of the classification pipeline is accomplished via a multi-pipeline tuning approach that uses Statistical Machine Learning Tools (SMLTs) and a classification cost modeler.

    摘要翻译： 讨论了使移动设备有效地将原始传感器数据分类为有用的高级推断数据的架构和技术。 通过调整移动设备的原始传感器数据分类流水线达到适合移动设备的精度，延迟和能量的平衡来实现分类效率。 分类流水线的调整是通过使用统计机器学习工具（SMLT）和分类成本建模器的多管线调整方法实现的。

    Resource modeling and scheduling for extensible computing platforms
    38.
    发明授权
    Resource modeling and scheduling for extensible computing platforms 有权
    可扩展计算平台的资源建模和调度

    公开(公告)号：US08984520B2

    公开(公告)日：2015-03-17

    申请号：US11763397

    申请日：2007-06-14

    申请人： Jie Liu ,  Feng Zhao ,  Michel Goraczko ,  Slobodan Matic ,  Dimitrios Lymberopoulos ,  Nissanka Priyantha

    发明人： Jie Liu ,  Feng Zhao ,  Michel Goraczko ,  Slobodan Matic ,  Dimitrios Lymberopoulos ,  Nissanka Priyantha

    IPC分类号： G06F9/46 ,  G06F1/00 ,  G06F1/32 ,  G06F9/48

    CPC分类号： G06F1/3203 ,  G06F1/329 ,  G06F9/4893 ,  G06F2209/484 ,  Y02D10/24

    摘要： Energy management modeling and scheduling techniques are described for reducing the power consumed to execute an application on a multi-processor computing platform within a certain time period. In one embodiment, a sophisticated resource model which accounts for discrete operating modes for computing components/resources on a computing platform and transition costs for transitioning between each of the discrete modes is described. This resource model provides information for a specific heterogeneous multi-processor computing platform and an application being implemented on the platform in a form that can be processed by a selection module, typically utilizing an integer linear programming (ILP) solver or algorithm, to select a task schedule and operating configuration(s) for executing the application within a given time.

    摘要翻译： 描述了能量管理建模和调度技术，以在一定时间段内减少在多处理器计算平台上执行应用程序所消耗的功耗。 在一个实施例中，描述了考虑用于在计算平台上计算组件/资源的离散操作模式的复杂资源模型以及在每个离散模式之间转换的转换成本。 该资源模型提供用于特定异构多处理器计算平台和正在平台上实现的应用程序的信息，该应用程序可以由通常利用整数线性规划（ILP）解算器或算法的选择模块来处理的形式来选择 任务计划和在给定时间内执行应用程序的操作配置。

    Querying compressed time-series signals
    39.
    发明授权
    Querying compressed time-series signals 有权
    查询压缩时间序列信号

    公开(公告)号：US08655887B2

    公开(公告)日：2014-02-18

    申请号：US13491838

    申请日：2012-06-08

    申请人： Jie Liu ,  Suman Kumar Nath ,  Feng Zhao ,  Galen Andrew Reeves ,  Sorabh Kumar Gandhi

    发明人： Jie Liu ,  Suman Kumar Nath ,  Feng Zhao ,  Galen Andrew Reeves ,  Sorabh Kumar Gandhi

    IPC分类号： G06F7/00 ,  G06F17/30

    CPC分类号： G06F17/30516

    摘要： Technologies pertaining to compressing time-series signals are described herein. Groups of time-series signals are generated based upon similarities between time-series signals. Each group of time-series signals includes a respective base time-series signal. Ratio signals that are representative of time-series signals are computed, wherein the ratio signals are based upon the base time-series signal and other respective time-series signals in a group of time-series signals.

    摘要翻译： 本文描述了压缩时间序列信号的技术。 基于时间序列信号之间的相似度生成时间序列信号组。 每组时间序列信号包括各自的基本时间序列信号。 计算代表时间序列信号的比率信号，其中比率信号基于一组时间序列信号中的基本时间序列信号和其它相应的时间序列信号。

    Apparatus having a slidable cap
    40.
    发明授权
    Apparatus having a slidable cap 失效
    装置具有可滑动盖

    公开(公告)号：US08444339B2

    公开(公告)日：2013-05-21

    申请号：US13412536

    申请日：2012-03-05

    申请人： Feng Zhao ,  Weiying Chen

    发明人： Feng Zhao ,  Weiying Chen

    IPC分类号： B43K7/12

    CPC分类号： B43K23/12 ,  B43K23/126 ,  B43K25/022

    摘要： An apparatus comprises a body that extends longitudinally between a top end and a bottom end, an elongate slot disposed in an outer surface of the body and having first and second spaced-apart detents, and a cap disposed coaxially around the body and having a cut therein that defines an elongate arm. The elongate arm has an inwardly-oriented protrusion configured to engage the detents of the slot. The cap is slidable along the body such that the inwardly-oriented protrusion slides along the slot until it detachably engages a detent, thereby retaining the cap in either a closed position that covers the bottom end or an open position in which the bottom end is exposed.

    摘要翻译： 一种装置包括在顶端和底端之间纵向延伸的主体，设置在主体的外表面中并具有第一和第二间隔开的棘爪的细长狭槽以及同轴地设置在身体周围并具有切口 其中限定了细长臂。 细长臂具有配置成接合槽的棘爪的向内取向的突起。 盖可以沿主体滑动，使得向内取向的突出部沿着狭槽滑动，直到其可拆卸地接合制动器，从而将盖保持在封闭位置，该关闭位置覆盖底端或底端露出的打开位置 。