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    Wireless passive radio-frequency strain and displacement sensors
    2.
    发明授权
    Wireless passive radio-frequency strain and displacement sensors 有权
    无线无源射频应变和位移传感器

    公开(公告)号：US09038483B2

    公开(公告)日：2015-05-26

    申请号：US13394490

    申请日：2010-09-07

    申请人： Ramaswamy Nagarajan ,  Jungrae Park ,  Sharavanan Balasubramaniam ,  Mario J. Cazeca ,  Shivshankar Sivasubramanian ,  Joey Mead ,  Julie Chen

    发明人： Ramaswamy Nagarajan ,  Jungrae Park ,  Sharavanan Balasubramaniam ,  Mario J. Cazeca ,  Shivshankar Sivasubramanian ,  Joey Mead ,  Julie Chen

    IPC分类号： G01D7/00 ,  G01B7/14 ,  G01R27/04 ,  G01L1/14 ,  G01B7/16 ,  G01B15/06 ,  G01D21/00 ,  G01M5/00 ,  G01L9/00

    CPC分类号： G01L1/14 ,  G01B7/16 ,  G01B15/06 ,  G01D21/00 ,  G01L9/007 ,  G01L9/0072 ,  G01L9/0075 ,  G01M5/0041 ,  G01M5/0083 ,  G01M5/0091 ,  Y10T29/49103

    摘要： Wireless strain and displacement sensors wirelessly monitor structural health and integrity, and are made by printing inductor-interdigital capacitor sensing circuits on a variety of substrates, including ceramic substrates, with thermally processable conductive inks. Sensors of the invention can be employed to detect strain and displacement of civil structures, such as bridges and buildings. The sensors include sensing elements that are mounted or printed on stiff, inflexible substrates, which prevent the sensing elements from bending, stretching, or otherwise warping when the sensor is strained. An interlayer between the sensing elements allows the sensing elements to move with respect to each other during application of strain. Thus, strain causes the sensing elements to move but not to deform, causing changes in sensor resonance that can be detected through wireless radio-frequency interrogation. Because the sensing elements do not change shape when under strain, the sensor can undergo millions of measurement cycles before breaking.

    摘要翻译： 无线应变和位移传感器无线监测结构健康和完整性，并通过在各种基板（包括陶瓷基板）上印刷电感器 - 指数间电容器感测电路，并具有可热处理的导电油墨。 可以使用本发明的传感器来检测诸如桥梁和建筑物的民用结构的应变和位移。 这些传感器包括安装或印刷在刚性，不弯曲的基底上的传感元件，当传感器变形时，传感元件可防止传感元件弯曲，拉伸或以其它方式翘曲。 感测元件之间的中间层允许感测元件在应变期间相对于彼此移动。 因此，应变使得感测元件移动但不变形，导致可以通过无线射频询问来检测的传感器谐振的变化。 由于感应元件在应变时不会改变形状，因此传感器可以在断开之前经历数百万次的测量周期。

    Wireless Passive Radio-Frequency Strain And Displacement Sensors
    3.
    发明申请
    Wireless Passive Radio-Frequency Strain And Displacement Sensors 有权
    无源无源射频应变和位移传感器

    公开(公告)号：US20120297888A1

    公开(公告)日：2012-11-29

    申请号：US13394490

    申请日：2010-09-07

    申请人： Ramaswamy Nagarajan ,  Jungrae Park ,  Sharavanan Balasubramaniam ,  Mario J. Cazeca ,  Shivshankar Sivasubramanian ,  Joey Mead ,  Julie Chen

    发明人： Ramaswamy Nagarajan ,  Jungrae Park ,  Sharavanan Balasubramaniam ,  Mario J. Cazeca ,  Shivshankar Sivasubramanian ,  Joey Mead ,  Julie Chen

    IPC分类号： G01L1/00 ,  H01C17/28

    CPC分类号： G01L1/14 ,  G01B7/16 ,  G01B15/06 ,  G01D21/00 ,  G01L9/007 ,  G01L9/0072 ,  G01L9/0075 ,  G01M5/0041 ,  G01M5/0083 ,  G01M5/0091 ,  Y10T29/49103

    摘要： Wireless strain and displacement sensors wirelessly monitor structural health and integrity, and are made by printing inductor-interdigital capacitor sensing circuits on a variety of substrates, including ceramic substrates, with thermally processable conductive inks. Sensors of the invention can be employed to detect strain and displacement of civil structures, such as bridges and buildings. The sensors include sensing elements that are mounted or printed on stiff, inflexible substrates, which prevent the sensing elements from bending, stretching, or otherwise warping when the sensor is strained. An interlayer between the sensing elements allows the sensing elements to move with respect to each other during application of strain. Thus, strain causes the sensing elements to move but not to deform, causing changes in sensor resonance that can be detected through wireless radio-frequency interrogation. Because the sensing elements do not change shape when under strain, the sensor can undergo millions of measurement cycles before breaking.

    摘要翻译： 无线应变和位移传感器无线监测结构健康和完整性，并通过在各种基板（包括陶瓷基板）上印刷电感器 - 指数间电容器感测电路，并具有可热处理的导电油墨。 可以使用本发明的传感器来检测诸如桥梁和建筑物的民用结构的应变和位移。 这些传感器包括安装或印刷在刚性，不弯曲的基底上的传感元件，当传感器变形时，传感元件可防止传感元件弯曲，拉伸或以其它方式翘曲。 感测元件之间的中间层允许感测元件在应变期间相对于彼此移动。 因此，应变使得感测元件移动但不变形，导致可以通过无线射频询问来检测的传感器谐振的变化。 由于感应元件在应变时不会改变形状，因此传感器可以在断开之前经历数百万次的测量周期。

    Conductive Formulations For Use In Electrical, Electronic And RF Applications
    4.
    发明申请
    Conductive Formulations For Use In Electrical, Electronic And RF Applications 有权
    导电配方用于电气，电子和射频应用

    公开(公告)号：US20120273263A1

    公开(公告)日：2012-11-01

    申请号：US12628566

    申请日：2009-12-01

    申请人： Ramaswamy Nagarajan ,  Sharavanan Balasubramaniam ,  Julie Chen ,  Joey Mead

    发明人： Ramaswamy Nagarajan ,  Sharavanan Balasubramaniam ,  Julie Chen ,  Joey Mead

    IPC分类号： C09D5/00 ,  H05K1/09 ,  H05K3/12

    CPC分类号： H05K3/1216 ,  H05K1/092 ,  H05K1/097 ,  H05K1/162 ,  H05K1/165 ,  H05K3/105 ,  H05K3/1283 ,  H05K2201/0245 ,  H05K2201/10151 ,  H05K2203/121

    摘要： Metal flakes, an organic metal precursor, an organic solvent and either no binder, or a volatile or a thermally decomposable binder are combined to form a paste. The paste is deposited in a circuit pattern on a substrate and the circuit pattern is cured. While curing, the organic metal precursor decomposes to leave an electrically conductive path, and the printed circuit is thus formed. A precursor to an electrically conductive circuit material includes an organic metal precursor, metal microparticles, and an organic solvent. The method can be employed to form printed circuits, for a variety of electrical, electronic and sensing application, such as crack detection in ceramic, plastics, concrete, wood, fabric, leather, rubber or paper and composite materials.

    摘要翻译： 金属薄片，有机金属前体，有机溶剂和不含粘合剂，或挥发性或热分解粘合剂组合形成糊状物。 糊料以电路图案沉积在基底上，并且电路图案被固化。 在固化的同时，有机金属前体分解留下导电路径，由此形成印刷电路。 导电电路材料的前体包括有机金属前体，金属微粒和有机溶剂。 该方法可以用于形成印刷电路，用于各种电气，电子和感测应用，例如陶瓷，塑料，混凝土，木材，织物，皮革，橡胶或纸和复合材料中的裂纹检测。

    Conductive formulations for use in electrical, electronic and RF applications
    7.
    发明授权
    Conductive formulations for use in electrical, electronic and RF applications 有权
    用于电气，电子和射频应用的导电配方

    公开(公告)号：US08999431B2

    公开(公告)日：2015-04-07

    申请号：US12628566

    申请日：2009-12-01

    申请人： Ramaswamy Nagarajan ,  Sharavanan Balasubramaniam ,  Julie Chen ,  Joey Mead

    发明人： Ramaswamy Nagarajan ,  Sharavanan Balasubramaniam ,  Julie Chen ,  Joey Mead

    IPC分类号： B05D5/12 ,  H05K1/09 ,  H05K3/10

    CPC分类号： H05K3/1216 ,  H05K1/092 ,  H05K1/097 ,  H05K1/162 ,  H05K1/165 ,  H05K3/105 ,  H05K3/1283 ,  H05K2201/0245 ,  H05K2201/10151 ,  H05K2203/121

    摘要： Metal flakes, an organic metal precursor, an organic solvent and either no binder, or a volatile or a thermally decomposable binder are combined to form a paste. The paste is deposited in a circuit pattern on a substrate and the circuit pattern is cured. While curing, the organic metal precursor decomposes to leave an electrically conductive path, and the printed circuit is thus formed. A precursor to an electrically conductive circuit material includes an organic metal precursor, metal microparticles, and an organic solvent. The method can be employed to form printed circuits, for a variety of electrical, electronic and sensing application, such as crack detection in ceramic, plastics, concrete, wood, fabric, leather, rubber or paper and composite materials.

    摘要翻译： 金属薄片，有机金属前体，有机溶剂和不含粘合剂，或挥发性或热分解粘合剂组合形成糊状物。 糊料以电路图案沉积在基底上，并且电路图案被固化。 在固化的同时，有机金属前体分解留下导电路径，由此形成印刷电路。 导电电路材料的前体包括有机金属前体，金属微粒和有机溶剂。 该方法可以用于形成印刷电路，用于各种电气，电子和感测应用，例如陶瓷，塑料，混凝土，木材，织物，皮革，橡胶或纸和复合材料中的裂纹检测。