公开(公告)号：US08347722B2

公开(公告)日：2013-01-08

申请号：US12358108

申请日：2009-01-22

申请人： Xinlin Qing ,  Shawn J. Beard ,  Irene Li

发明人： Xinlin Qing ,  Shawn J. Beard ,  Irene Li

IPC分类号： G01N29/14

CPC分类号： G01N29/42 ,  G01N29/045 ,  G01N29/12 ,  G01N29/2437 ,  G01N2291/0258

摘要： Sensors affixed to various such structures, where the sensors can withstand, remain affixed, and operate while undergoing both cryogenic temperatures and high vibrations. In particular, piezoelectric single crystal transducers are utilized, and these sensors are coupled to the structure via a low temperature, heat cured epoxy. This allows the transducers to monitor the structure while the engine is operating, even despite the harsh operating conditions. Aspects of the invention thus allow for real time monitoring and analysis of structures that operate in conditions that previously did not permit such analysis. A further aspect of the invention relates to use of piezoelectric single crystal transducers. In particular, use of such transducers allows the same elements to be used as both sensors and actuators.

摘要翻译： 固定到传感器可承受的各种这种结构的传感器保持固定并且在经受低温和高振动的同时操作。 特别地，使用压电单晶转换器，并且这些传感器经由低温热固化环氧树脂与结构耦合。 这使得发动机运行时，传感器可以监控结构，尽管操作条件恶劣。 因此，本发明的方面允许对在先前不允许这种分析的条件下操作的结构的实时监测和分析。 本发明的另一方面涉及使用压电单晶换能器。 特别地，使用这种换能器允许将相同的元件用作传感器和致动器。

公开(公告)号：US08244486B2

公开(公告)日：2012-08-14

申请号：US12432668

申请日：2009-04-29

申请人： Chang Zhang ,  Xinlin Qing ,  Irene Li

发明人： Chang Zhang ,  Xinlin Qing ,  Irene Li

IPC分类号： G06F19/00

CPC分类号： G01M5/00

摘要： Storage of information, such as baseline information and structure ID, in a memory that is mounted on the structure, rather than inside the diagnosis hardware. This allows for faster and more convenient information retrieval. In particular, this approach allows for a more modular system in which different diagnosis hardware or other analyzers can be simply plugged into a structure's sensor network, whereupon they can quickly download any desired structure-specific information (e.g., baseline information, structure ID, and other useful information) from the on-structure memory.

摘要翻译： 将信息（如基线信息和结构ID）存储在安装在结构上而不是诊断硬件内的存储器中。 这允许更快更方便的信息检索。 特别地，这种方法允许一种更加模块化的系统，其中不同的诊断硬件或其他分析器可以简单地插入到结构的传感器网络中，于是它们可以快速下载任何期望的结构特定信息（例如，基线信息，结构ID和 其他有用的信息）从结构内存。

公开(公告)号：US08046177B2

公开(公告)日：2011-10-25

申请号：US12060799

申请日：2008-04-01

申请人： Bao Liu ,  Irene Li ,  Fu-Kuo Chang

发明人： Bao Liu ,  Irene Li ,  Fu-Kuo Chang

IPC分类号： G01B5/28 ,  G01M3/00

CPC分类号： G01N29/041 ,  G01N29/36 ,  G01N29/4463 ,  G01N2291/0427 ,  G01N2291/106

摘要： Detection of damage in armor structures, using networks of piezoelectric transducers. In particular, piezoelectric transducers can be placed at various points on the armor structure, effectively creating a number of paths between pairs of transducers. Each of these paths can be queried by transmitting an ultrasonic stress wave from one transducer to the other, and analyzing changes in the stress wave. The signal from the received stress wave can be time gated to remove crosstalk, and the resulting time gated signal can be analyzed for characteristics of damage. For instance, if the time gated signal is sufficiently attenuated, it can be determined that the armor structure has sustained damage to at least that region traversed by this particular path.

摘要翻译： 使用压电换能器网络检测装甲结构中的损伤。 特别地，压电换能器可以放置在装甲结构上的各个点上，有效地在成对的换能器之间产生多个路径。 通过将超声应力波从一个换能器传递到另一个换能器，并分析应力波的变化，可以查询这些路径中的每一个。 来自接收的应力波的信号可以被时间选通以消除串扰，并且可以分析所得到的时间门控信号的损伤特性。 例如，如果时间门控信号被充分衰减，则可以确定装甲结构至少受到该特定路径穿过的区域的持续损坏。

公开(公告)号：US20110035167A1

公开(公告)日：2011-02-10

申请号：US12536429

申请日：2009-08-05

申请人： Xinlin QING ,  Chang Zhang ,  Irene Li ,  Fu-kuo Chang ,  Hung Chi Chung

发明人： Xinlin QING ,  Chang Zhang ,  Irene Li ,  Fu-kuo Chang ,  Hung Chi Chung

IPC分类号： G01R31/307

CPC分类号： G01M5/0033 ,  G01M5/00 ,  G01M5/0066 ,  G01M5/0075 ,  G01N29/075 ,  G01N29/2437 ,  G01N29/4427 ,  G01N29/48 ,  G01N2291/0289 ,  G01N2291/105 ,  Y10T29/49016 ,  Y10T29/49117

摘要： A structural health monitoring system using ASICs for signal transmission, reception, and analysis. Incorporating structural health monitoring functionality into one or more ASICs provides a durable yet small, lightweight, low cost, and portable system that can be deployed and operated in field conditions. Such systems provide significant advantages, especially in applications such as armor structures.

摘要翻译： 一种使用ASIC进行信号传输，接收和分析的结构健康监测系统。 将结构健康监控功能结合到一个或多个ASIC中提供了一种耐用但体积小，重量轻，成本低廉的便携式系统，可在现场条件下部署和运行。 这种系统提供显着的优点，特别是在诸如装甲结构的应用中。

公开(公告)号：US20090276168A1

公开(公告)日：2009-11-05

申请号：US12432659

申请日：2009-04-29

申请人： Bao Liu ,  Lien Ouyang ,  Shawn J. Beard ,  Irene Li ,  Fu-Kuo Chang

发明人： Bao Liu ,  Lien Ouyang ,  Shawn J. Beard ,  Irene Li ,  Fu-Kuo Chang

IPC分类号： G01N29/14

CPC分类号： G01H1/00

摘要： Methods and apparatuses for detecting fastener loosening. Sensors query a structure at a baseline value of an environment variable, such as temperature, and this baseline signal is stored for later use. Subsequently, users can query the structure remotely and at any time, and the signals from these queries are compared to the stored baseline signal. In some embodiments, an index is calculated, and the system determines that one or more fasteners have come loose if the calculated index exceeds a predetermined threshold value. It is desirable to select a time window within which the query signal is most sensitive to fastener loosening but least sensitive to variations in the environment variable. Accordingly, embodiments of the invention include methods and apparatuses for determining an optimal time window for use in calculating the above described index.

摘要翻译： 用于检测紧固件松动的方法和装置。 传感器以环境变量（如温度）的基准值查询结构，并将此基线信号存储供以后使用。 随后，用户可以在任何时间远程查询结构，并将来自这些查询的信号与存储的基线信号进行比较。 在一些实施例中，计算索引，并且如果所计算的索引超过预定阈值，则系统确定一个或多个紧固件已经松动。 期望选择查询信号对紧固件松动最敏感但对环境变量的变化最不敏感的时间窗。 因此，本发明的实施例包括用于确定用于计算上述索引的最佳时间窗口的方法和装置。

公开(公告)号：US20090043516A1

公开(公告)日：2009-02-12

申请号：US12060799

申请日：2008-04-01

申请人： Bao Liu ,  Irene Li ,  Fu-Kuo Chang

发明人： Bao Liu ,  Irene Li ,  Fu-Kuo Chang

IPC分类号： G01B5/28

CPC分类号： G01N29/041 ,  G01N29/36 ,  G01N29/4463 ,  G01N2291/0427 ,  G01N2291/106

摘要： Detection of damage in armor structures, using networks of piezoelectric transducers. In particular, piezoelectric transducers can be placed at various points on the armor structure, effectively creating a number of paths between pairs of transducers. Each of these paths can be queried by transmitting an ultrasonic stress wave from one transducer to the other, and analyzing changes in the stress wave. The signal from the received stress wave can be time gated to remove crosstalk, and the resulting time gated signal can be analyzed for characteristics of damage. For instance, if the time gated signal is sufficiently attenuated, it can be determined that the armor structure has sustained damage to at least that region traversed by this particular path.

摘要翻译： 使用压电换能器网络检测装甲结构中的损伤。 特别地，压电换能器可以放置在装甲结构上的各个点上，有效地在成对的换能器之间产生多个路径。 通过将超声应力波从一个换能器传递到另一个换能器，并分析应力波的变化，可以查询这些路径中的每一个。 来自接收的应力波的信号可以被时间选通以消除串扰，并且可以分析所得到的时间门控信号的损伤特性。 例如，如果时间门控信号被充分衰减，则可以确定装甲结构至少受到该特定路径穿过的区域的持续损坏。

公开(公告)号：US07430911B2

公开(公告)日：2008-10-07

申请号：US10928788

申请日：2004-08-26

申请人： Xinlin Qing ,  Chang Zhang ,  Irene Li

发明人： Xinlin Qing ,  Chang Zhang ,  Irene Li

IPC分类号： G01H1/00

CPC分类号： G01M5/0033 ,  G01L1/162 ,  G01M5/0041 ,  G01M5/0066 ,  G01M5/0083

摘要： A method for both detecting and analyzing a change in the loading condition of a structure. A flexible substrate is employed, in which a distributed network of sensors is built. This substrate is either affixed to the surface of the structure, or built within it, so as to be able to detect propagating stress waves. After load change is detected, the resulting sensor signals are analyzed to determine the location, severity, and/or any characteristic frequencies of the load change. This information is then used to determine an appropriate response.

摘要翻译： 一种用于检测和分析结构的装载状况的变化的方法。 使用柔性基板，其中建立了分布式传感器网络。 该衬底或者固定在结构的表面上，或者内置于其中，以便能够检测传播的应力波。 检测到负载变化后，分析所得到的传感器信号，以确定负载变化的位置，严重程度和/或任何特征频率。 然后将此信息用于确定适当的响应。

公开(公告)号：US20060042396A1

公开(公告)日：2006-03-02

申请号：US10928788

申请日：2004-08-26

申请人： Xinlin Qing ,  Chang Zhang ,  Irene Li

发明人： Xinlin Qing ,  Chang Zhang ,  Irene Li

IPC分类号： G01L1/16

CPC分类号： G01M5/0033 ,  G01L1/162 ,  G01M5/0041 ,  G01M5/0066 ,  G01M5/0083

摘要： A method for both detecting and analyzing a change in the loading condition of a structure. A flexible substrate is employed, in which a distributed network of sensors is built. This substrate is either affixed to the surface of the structure, or built within it, so as to be able to detect propagating stress waves. After load change is detected, the resulting sensor signals are analyzed to determine the location, severity, and/or any characteristic frequencies of the load change. This information is then used to determine an appropriate response.

摘要翻译： 一种用于检测和分析结构的装载状况的变化的方法。 使用柔性基板，其中建立了分布式传感器网络。 该衬底或者固定在结构的表面上，或者内置于其中，以便能够检测传播的应力波。 检测到负载变化后，分析所得到的传感器信号，以确定负载变化的位置，严重程度和/或任何特征频率。 然后将此信息用于确定适当的响应。

公开(公告)号：US20120271563A1

公开(公告)日：2012-10-25

申请号：US13370099

申请日：2012-02-09

申请人： Xinlin QING ,  Chang Zhang ,  Irene Li ,  Fu-kuo Chang ,  Hung Chi Chung

发明人： Xinlin QING ,  Chang Zhang ,  Irene Li ,  Fu-kuo Chang ,  Hung Chi Chung

IPC分类号： G06F19/00 ,  G01L1/16 ,  G01D21/00

CPC分类号： G01M5/0033 ,  G01M5/00 ,  G01M5/0066 ,  G01M5/0075 ,  G01N29/075 ,  G01N29/2437 ,  G01N29/4427 ,  G01N29/48 ,  G01N2291/0289 ,  G01N2291/105 ,  Y10T29/49016 ,  Y10T29/49117

摘要： A structural health monitoring system using ASICs for signal transmission, reception, and analysis. Incorporating structural health monitoring functionality into one or more ASICs provides a durable yet small, lightweight, low cost, and portable system that can be deployed and operated in field conditions. Such systems provide significant advantages, especially in applications such as armor structures.

摘要翻译： 一种使用ASIC进行信号传输，接收和分析的结构健康监测系统。 将结构健康监控功能结合到一个或多个ASIC中提供了一种耐用但体积小，重量轻，成本低廉的便携式系统，可在现场条件下部署和运行。 这种系统提供显着的优点，特别是在诸如装甲结构的应用中。

公开(公告)号：US20100161283A1

公开(公告)日：2010-06-24

申请号：US12718817

申请日：2010-03-05

申请人： Xinlin QING ,  Sourav BENERJEE ,  Chang ZHANG ,  Shawn BEARD ,  Irene LI ,  Fu-Kuo CHANG

发明人： Xinlin QING ,  Sourav BENERJEE ,  Chang ZHANG ,  Shawn BEARD ,  Irene LI ,  Fu-Kuo CHANG

IPC分类号： G06F15/00

CPC分类号： G01N29/2475 ,  G01N2291/0258 ,  G01N2291/106 ,  H04L43/0817 ,  H04L67/125

摘要： A networked configuration of structural health monitoring elements. Monitoring elements such as sensors and actuators are configured as a network, with groups of monitoring elements each controlled by a local controller, or cluster controller. A data bus interconnects each cluster controller with a router, forming a networked group of “monitoring clusters” connected to a router. In some embodiments, the router identifies particular clusters, and sends commands to the appropriate cluster controllers, instructing them to carry out the appropriate monitoring operations. In turn, the cluster controllers identify certain ones of their monitoring elements, and direct them to monitor the structure as necessary. Data returned from the monitoring elements is sent to the cluster controllers, which then pass the information to the router. Other embodiments employ multiple sensor groups directly connected to a central controller, perhaps with distributed local control elements. Methods of operation are also disclosed.

摘要翻译： 结构健康监测元素的联网配置。 诸如传感器和执行器之类的监控元件被配置为网络，各组监视元件各自由本地控制器或集群控制器控制。 数据总线将每个集群控制器与路由器互连，形成连接到路由器的联网组“监控集群”。 在一些实施例中，路由器识别特定的集群，并向适当的集群控制器发送命令，指示它们执行适当的监视操作。 反过来，集群控制器识别其中的某些监视元素，并指示它们根据需要监视结构。 从监控元素返回的数据被发送到集群控制器，然后将这些信息传递给路由器。 其他实施例采用直接连接到中央控制器的多个传感器组，可能具有分布式本地控制元件。 还公开了操作方法。