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    • 3. 发明授权
    • Wireless structural health monitoring system with synchronized timekeeper
    • 具有同步计时器的无线结构健康监测系统
    • US09090339B2
    • 2015-07-28
    • US13196031
    • 2011-08-02
    • Steven W. ArmsChris Pruyn TownsendDavid Lawrence ChurchillMichael John Hamel
    • Steven W. ArmsChris Pruyn TownsendDavid Lawrence ChurchillMichael John Hamel
    • G08B1/08B64C27/00G01M5/00G07C5/08
    • B64C27/006B64C2027/002G01M5/00G07C5/085
    • A method of obtaining data about a structure includes providing a plurality of sensor modules on the structure. Each of the sensor modules includes a sensor, a processor, a sensor module precision timekeeper, and a sensor module transceiver. One of the plurality of sensor modules includes an energy harvesting device. The processor and the sensor module transceiver of this one of the plurality of sensor modules are powered solely with electricity derived from the energy harvesting device. The method further includes providing a base station. The method further includes periodically wirelessly receiving a broadcast resynchronization timing packet with each of the sensor module transceivers, wherein the broadcast resynchronization timing packet received by each of the sensor module transceivers includes a common resynchronization time value. The method further includes periodically resynchronizing each of the sensor module precision timekeepers based on a signal derived from the resynchronization time value. The method further includes digital sampling of the sensor module sensor in each of the sensor modules to provide digital sensor data, and providing a time stamp to the digital sensor data wherein time in the time stamp is provided by the sensor module precision timekeeper. The method further includes wirelessly transmitting data from each of the plurality of sensor modules to the base station, wherein the data is derived from the time stamped digital sensor data. The method further includes receiving and aggregating the data from each of the plurality of sensor modules in the base station.
    • 获得关于结构的数据的方法包括在该结构上提供多个传感器模块。 每个传感器模块包括传感器,处理器,传感器模块精密计时器和传感器模块收发器。 多个传感器模块中的一个包括能量收集装置。 多个传感器模块中的该一个传感器模块的处理器和传感器模块收发器仅由来自能量收集装置的电力供电。 该方法还包括提供基站。 该方法还包括周期性地与传感器模块收发器中的每一个无线地接收广播再同步定时分组,其中由每个传感器模块收发机接收的广播再同步定时分组包括公共重新同步时间值。 该方法还包括基于从再同步时间值导出的信号周期性地重新同步每个传感器模块精确计时器。 该方法还包括在每个传感器模块中的传感器模块传感器的数字采样,以提供数字传感器数据,并为数字传感器数据提供时间戳,其中时间戳中的时间由传感器模块精密计时器提供。 该方法还包括将数据从多个传感器模块中的每一个无线传输到基站,其中数据从时间戳的数字传感器数据导出。 该方法还包括从基站中的多个传感器模块中的每一个接收和聚合数据。
    • 5. 发明授权
    • Wide-band vibration energy harvester with restoring spring
    • 带恢复弹簧的宽带振动能量收割机
    • US08134282B1
    • 2012-03-13
    • US12873801
    • 2010-09-01
    • David L. ChurchillSteven W. ArmsMichael J. HamelJames Marc Leas
    • David L. ChurchillSteven W. ArmsMichael J. HamelJames Marc Leas
    • H01L41/113
    • H01L41/1136H01L41/1134H02N2/181H02N2/186
    • A device for harvesting an external source of energy includes an electricity generating device, a flexure, and a restoring spring. The electricity generating device generates electricity based on movement of the flexure. The flexure has a first stable position. When disregarding presence of the restoring spring the flexure also has a second stable position different from the first stable position. The restoring spring is positioned so when the flexure snaps from the first stable position toward the second stable position the restoring spring provides a restoring spring force to restore the flexure toward the first stable position. Substantially greater force is needed to snap the flexure from the first stable position toward the second stable position to overcome the restoring spring force than is required to snap the flexure from the second stable position toward the first stable position.
    • 用于收获外部能量源的装置包括发电装置,挠曲件和恢复弹簧。 发电装置基于挠曲件的移动发电。 挠曲具有第一稳定位置。 当不考虑恢复弹簧的存在时,挠曲件还具有不同于第一稳定位置的第二稳定位置。 复位弹簧定位成当挠曲件从第一稳定位置朝向第二稳定位置卡扣时,复位弹簧提供恢复弹簧力以将挠曲件恢复到朝向第一稳定位置。 需要更大的力将挠曲件从第一稳定位置朝向第二稳定位置卡扣,以克服比将挠曲件从第二稳定位置朝向第一稳定位置卡扣所需的复原弹簧力。
    • 6. 发明申请
    • Integrated Piezoelectric Composite and Support Circuit
    • 集成压电复合和支持电路
    • US20110156532A1
    • 2011-06-30
    • US12647364
    • 2009-12-24
    • David L. ChurchillSteven W. ArmsJames Marc Leas
    • David L. ChurchillSteven W. ArmsJames Marc Leas
    • H02N2/18
    • G01L1/26H01L27/20H01L41/053H02N2/181H02N2/186
    • A module includes a flexible support member, a first piezoelectric element, a second piezoelectric element, an energy harvesting circuit, and a circuit element. The energy harvesting circuit includes a first rectifying device, a second rectifying device, a common output, and an energy storage device. The flexible support member includes an insulator having a pattern of wiring traces. The first piezoelectric element, the second piezoelectric element, the first rectifying device, and the second rectifying device are all mounted on and electrically connected to the flexible support member. The first rectifying device is electrically connected to the first piezoelectric element. The second rectifying device is electrically connected to the second piezoelectric element. The first rectifying device is electrically connected to the second rectifying device to provide the common output. The common output is connected for providing electrical energy harvested from at least one from the group consisting of the first piezoelectric element and the second piezoelectric element to the energy storage device. The energy storage device is connected for providing electricity for powering the circuit element.
    • 模块包括柔性支撑构件,第一压电元件,第二压电元件,能量收集电路和电路元件。 能量收集电路包括第一整流装置,第二整流装置,公共输出端和能量存储装置。 柔性支撑构件包括具有布线迹线图案的绝缘体。 第一压电元件,第二压电元件,第一整流装置和第二整流装置都安装在柔性支撑构件上并电连接到柔性支撑构件。 第一整流装置电连接到第一压电元件。 第二整流装置电连接到第二压电元件。 第一整流装置电连接到第二整流装置以提供公共输出。 公共输出被连接用于提供从至少一个从第一压电元件和第二压电元件组成的组中收集到能量存储装置的电能。 能量存储装置被连接以提供用于为电路元件供电的电力。