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    Sensor array system
    61.
    发明授权
    Sensor array system 有权
    传感器阵列系统

    公开(公告)号：US06399939B1

    公开(公告)日：2002-06-04

    申请号：US09592884

    申请日：2000-06-13

    申请人： Mannur J. Sundaresan ,  Anindya Ghoshal ,  Mark J. Schulz

    发明人： Mannur J. Sundaresan ,  Anindya Ghoshal ,  Mark J. Schulz

    IPC分类号： G01N2100

    CPC分类号： G10K11/26 ,  G01H1/12 ,  G01N29/14 ,  G01N29/36 ,  G01N29/42 ,  G01N2291/015 ,  G01N2291/0231 ,  G01N2291/0427 ,  G01N2291/106 ,  Y10S73/04

    摘要： A sensor array for nondestructively monitoring a structure to detect a critical event. The sensor array includes a plurality of discrete sensor nodes, each of the discrete sensor nodes producing an electrical signal in response to a structural event. In the preferred embodiment, the sensor nodes include a plurality of piezoceramic fibers arranged in a planar array in which the fibers are aligned substantially parallel to each other, each of the fibers having a plurality of polarized regions that are substantially oriented according to their polarity in either a series, parallel, or combined arrangement of series and parallel orientations, and an electrical interface connecting the plurality of polarized regions of each fiber in series with one another. A signal adder receives and combines the electrical signals from each of the discrete sensor nodes to form a single sensor array output signal. In the preferred embodiment, the electrical interface further includes at least one electrical bus substantially aligned with the fibers and a signal processing module for receiving and processing the single sensor output signal. The signal processing module is linked through the digital data bus to a central processing unit. The plurality of discrete sensor nodes may further be divided into discrete subgroups, each located at a different structural location to provide a degree of sensing and determining the location of the structural event. In the preferred embodiment, the discrete sensor nodes are electrically connected in series, thereby forming a continuous series connection between each of the discrete sensor nodes to improve the likelihood that a critical structural event will be detected.

    摘要翻译： 用于非破坏性地监视结构以检测关键事件的传感器阵列。 传感器阵列包括多个离散传感器节点，每个离散传感器节点响应于结构事件产生电信号。 在优选实施例中，传感器节点包括布置在平面阵列中的多个压电陶瓷纤维，其中纤维基本上彼此平行地排列，每个光纤具有多个偏振区域，其基于其极性基本上取向 串联和并联取向的串联，并联或组合布置，以及将每个光纤的多个偏振区域彼此串联连接的电接口。 信号加法器接收并组合来自每个离散传感器节点的电信号以形成单个传感器阵列输出信号。 在优选实施例中，电接口还包括与光纤基本对准的至少一个电总线和用于接收和处理单个传感器输出信号的信号处理模块。 信号处理模块通过数字数据总线连接到中央处理单元。 多个离散传感器节点还可以被划分成离散子组，每个分组位于不同的结构位置以提供一定程度的感测并确定结构事件的位置。 在优选实施例中，离散传感器节点串联电连接，从而在每个离散传感器节点之间形成连续的串联连接，以提高检测到关键结构事件的可能性。

    Non-destructive evaluation method and apparatus for measuring acoustic material nonlinearity
    63.
    发明授权
    Non-destructive evaluation method and apparatus for measuring acoustic material nonlinearity 失效
    用于测量声学材料非线性的非破坏性评估方法和装置

    公开(公告)号：US06343513B1

    公开(公告)日：2002-02-05

    申请号：US09616346

    申请日：2000-07-14

    申请人： William T. Yost ,  John H. Cantrell

    发明人： William T. Yost ,  John H. Cantrell

    IPC分类号： G01H100

    CPC分类号： G01N29/11 ,  G01H5/00 ,  G01N29/30 ,  G01N29/42 ,  G01N29/48 ,  G01N2291/02491 ,  G01N2291/0421

    摘要： An acoustic non-linearity parameter (&bgr;) measurement method and system for Non-Destructive Evaluation (NDE) of materials and structural members obviates the need for electronic calibration of the measuring equipment. Unlike known substitutional measuring techniques requiring elaborate calibration procedures, the electrical outputs of the capacitive detector of a sample with known &bgr; and the test sample of unknown &bgr; are compared to determine the unknown &bgr;. In order to provide the necessary stability of the present-inventive reference-based approach, the bandpass filters of the measurement system are maintained in a temperature-controlled environment, and the line voltage supplied to said amplifiers is well-regulated.

    摘要翻译： 用于材料和结构构件的非破坏性评估（NDE）的声学非线性参数（beta）测量方法和系统消除了对测量设备的电子校准的需要。 与需要精细校准程序的已知替代测量技术不同，比较具有已知β的样品的电容检测器的电输出和未知β的测试样品以确定未知的β。 为了提供本发明的基于参考的方法的必要稳定性，测量系统的带通滤波器被保持在温度受控的环境中，并且提供给所述放大器的线电压被良好调节。

    Hybrid transient-parametric method and system to distinguish and analyze sources of acoustic emission for nondestructive inspection and structural health monitoring
    64.
    发明申请
    Hybrid transient-parametric method and system to distinguish and analyze sources of acoustic emission for nondestructive inspection and structural health monitoring 审中-公开
    混合瞬态参数法和系统来区分和分析无损检测和结构健康监测声发射源

    公开(公告)号：US20010047691A1

    公开(公告)日：2001-12-06

    申请号：US09754020

    申请日：2001-01-03

    发明人： Yuris Dzenis

    IPC分类号： G01N029/00 ,  G01H001/00

    CPC分类号： G01N29/4427 ,  G01N29/14 ,  G01N29/36 ,  G01N29/38 ,  G01N29/40 ,  G01N29/42 ,  G01N29/4445 ,  G01N29/4481

    摘要： A nondestructive evaluation (NDE) technique for inspecting or health monitoring of structures and/or specimens by analyzing acoustic emission (AE) signals emitted by the structures and/or specimens. The method and system analyzes acoustic emission (AE) signals emitted by structures and/or specimens. AE signals emitted by the structures and/or specimens are parametrically filtered as a function of parametric filters corresponding to characteristic waveforms of transient AE classes of predefined AE signals. In parametric analysis, the filtering may be pre- or post-recording. In transient AE analysis, the filtering may be prior to transient recording of the transient signals.

    摘要翻译： 通过分析结构和/或标本发出的声发射（AE）信号，对结构和/或标本进行检测或健康监测的无损检测技术（NDE）。 该方法和系统分析结构和/或标本发出的声发射（AE）信号。 由结构和/或样本发射的AE信号作为对应于预定AE信号的瞬态AE等级的特征波形的参数滤波器的函数进行参数滤波。 在参数分析中，过滤可以是预录制或后记录。 在瞬态AE分析中，过滤可能在瞬态记录瞬态信号之前。

    Flaw detection system using acoustic doppler effect
    65.
    发明授权
    Flaw detection system using acoustic doppler effect 失效
    探伤系统采用声多普勒效应

    公开(公告)号：US06324912B1

    公开(公告)日：2001-12-04

    申请号：US09770323

    申请日：2001-01-26

    申请人： Shi-Chang Wooh

    发明人： Shi-Chang Wooh

    IPC分类号： G01N2900

    CPC分类号： B61K9/10 ,  G01N29/2412 ,  G01N29/2418 ,  G01N29/265 ,  G01N29/40 ,  G01N29/42 ,  G01N2291/017 ,  G01N2291/101 ,  G01N2291/102 ,  G01N2291/2623

    摘要： A flaw detection system using acoustic Doppler effect for detecting flaws in a medium wherein there is relative motion between the medium and system includes a transducer, spaced from the medium to be inspected, for introducing to and sensing from the medium an acoustic signal that propagates in the medium at a predetermined frequency; and a detector, responsive to the sensed propagating acoustic signal, for detecting in the sensed acoustic signal the Doppler shifted frequency representative of a flaw in the medium.

    摘要翻译： 使用声学多普勒效应来检测介质中的缺陷的探伤系统，其中在介质和系统之间存在相对运动的缺陷包括与要检查的介质间隔开的换能器，用于引入和感测来自介质的传播的声信号 介质以预定频率; 以及响应于所感测的传播声信号的检测器，用于在所感测的声信号中检测代表介质中的缺陷的多普勒频移频率。

    Vibration data processor and processing method
    66.
    发明授权
    Vibration data processor and processing method 失效
    振动数据处理器及处理方法

    公开(公告)号：US06275781B1

    公开(公告)日：2001-08-14

    申请号：US09056155

    申请日：1998-04-06

    申请人： Phillip L. Maness ,  Johannes I. Boerhout

    发明人： Phillip L. Maness ,  Johannes I. Boerhout

    IPC分类号： G01H1700

    CPC分类号： G01N29/46 ,  G01M13/045 ,  G01N29/12 ,  G01N29/42 ,  G01N2291/014 ,  G01N2291/044 ,  G01N2291/2696

    摘要： A vibration data processor and processing method uses a frequency domain filter having low pipeline delay and accurate time domain signal reconstruction. The filter may be user configurable, and the filter may receive input data from a variable number of decimation stages. Sequences of extracted vibrational features are routed to a variable length output buffer for event detection.

    摘要翻译： 振动数据处理器和处理方法使用具有低流水线延迟和精确时域信号重建的频域滤波器。 滤波器可以是用户可配置的，并且滤波器可以从可变数量的抽取级接收输入数据。 提取的振动特征的序列被路由到用于事件检测的可变长度输出缓冲器。

    Remote self-powered structure monitor
    70.
    发明授权
    Remote self-powered structure monitor 失效
    远程自供电结构监控

    公开(公告)号：US6014896A

    公开(公告)日：2000-01-18

    申请号：US241452

    申请日：1999-02-02

    申请人： Jeffrey N. Schoess

    发明人： Jeffrey N. Schoess

    IPC分类号： G01H1/00 ,  G01H11/08 ,  G01N29/14 ,  G01N29/42 ,  G01N29/46

    CPC分类号： G01M5/0033 ,  G01H1/003 ,  G01H11/08 ,  G01M5/0066 ,  G01N29/14 ,  G01N29/42 ,  G01N29/46 ,  G01N2291/014 ,  G01N2291/0289 ,  G01N2291/101 ,  G01N2291/2693

    摘要： An acoustic rotor monitor that is an autonomous self-powered measurement instrument which can detect embedded and hidden fatigue cracks in remotely inaccessible devices such as helicopter rotor system components. A predictive maintenance-related problem for rotor craft is the detection of fatigue cracks as a continuous real-time monitoring process under dynamic rotor system loading conditions. The rotor monitor focuses on the embedding an acoustic emission-based smart sensor directly into the rotor system to measure the high frequency stress waves indicating that a structural crack has propagated as a "self-powered" measurement without reducing structural integrity.

    摘要翻译： 声转子监视器是一种自主的自供电测量仪器，可以在远程不可访问的设备（如直升机转子系统组件）中检测到嵌入式和隐藏的疲劳裂纹。 转子工艺的预测维护相关问题是在动态转子系统负载条件下作为连续实时监测过程的疲劳裂纹检测。 转子监视器着重于将基于声发射的智能传感器直接嵌入到转子系统中，以测量高频应力波，表明结构裂纹已经作为“自供电”测量传播，而不会降低结构完整性。