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    • 7. 发明授权
    • Fastener and fitting based sensing methods
    • 基于紧固件和拟合的感应方法
    • US07528598B2
    • 2009-05-05
    • US11473297
    • 2006-06-22
    • Neil J. GoldfineDavid C. GrundyAndrew P. WashabaughYanko K. SheiretovDarrell E. Schlicker
    • Neil J. GoldfineDavid C. GrundyAndrew P. WashabaughYanko K. SheiretovDarrell E. Schlicker
    • G01R33/12G01R27/26
    • G01N27/82
    • Damage and usage conditions in the vicinity of fasteners in joined structures are nondestructively evaluated using the fasteners themselves. Sensors or sensor conductors are embedded in the fasteners or integrated within the fastener construct, either in the clearance gap between the fastener and the structure material or as an insert inside the shaft or pin of the fastener. The response of the material to an interrogating magnetic or electric field is then measured with drive and sense electrodes both incorporated into the fastener or with either drive or sense electrodes external to the fastener on the material surface. In another configuration, an electric current is applied to one or more fasteners and the electric potential is measured at locations typically between the driven electrodes applying the current. The potential is measured circumferentially around the fastener at locations on the material surface or across pairs of fasteners throughout or along the joint. The voltage or potential measurement electrodes may be collinear with the drive electrodes. State sensitive material layers can be added either to the fastener or the test material layers in order to enhance observability of the test material condition, such as the presence of a crack, mechanical stress, delamination, or disbond.
    • 使用紧固件本身对接合结构中紧固件附近的损坏和使用条件进行非破坏性评估。 传感器或传感器导体嵌入到紧固件中或整合在紧固件结构内,无论是在紧固件和结构材料之间的间隙中,或者作为紧固件的轴或销内的插入件。 然后测量材料对询问磁场或电场的响应,其中驱动和感测电极两者并入到紧固件中,或者与材料表面上的紧固件外部的驱动或感测电极结合。 在另一种配置中,电流被施加到一个或多个紧固件,并且在通常在施加电流的驱动电极之间的位置处测量电位。 在整个或沿着接头的材料表面上或穿过成对的紧固件的位置周围围绕紧固件测量电位。 电压或电位测量电极可与驱动电极共线。 可以将状态敏感材料层添加到紧固件或测试材料层中,以便增强测试材料状况的可观察性,例如存在裂纹,机械应力,分层或脱粘。
    • 8. 发明授权
    • Quasistatic magnetic and electric field stress/strain gages
    • 准静态磁场和电场应力/应变计
    • US07533575B2
    • 2009-05-19
    • US11702422
    • 2007-02-05
    • Neil J. GoldfineDarrell E. SchlickerDavid C. GrundyYanko K. SheiretovLeandro M. LorillaVladimir A. ZilbersteinVolker WeissJ. Timothy LovettAndrew P. Washabaugh
    • Neil J. GoldfineDarrell E. SchlickerDavid C. GrundyYanko K. SheiretovLeandro M. LorillaVladimir A. ZilbersteinVolker WeissJ. Timothy LovettAndrew P. Washabaugh
    • G01L1/00G01L1/12G01B7/24G01N27/82
    • G01L1/125
    • Magnetic or electric field sensors are mounted against a material surface and used for stress, strain, and load monitoring of rotating components such as vehicle drive trains. The stationary sensors are mounted at multiple locations around the component and used assess the stress on the component at multiple rotational positions. The sensor response is typically converted into a material property, such as magnetic permeability or electrical conductivity, which accounts for any coating thickness that may be present between the sensor and mounting surface. The sensors are not in direct contact with the rotating component and are typically mounted on an annular material or ring that encircles the rotating component. Measurements of the annular material properties, such as the stress, are related to the stress on the rotating component and discrete features on the component. As a particular example, the rotating component is a planetary gear system, with sensors mounted on the ring gear and the discrete features are carrier plate posts. The sensors are preferably mounted at equal distances around the circumference of the component. The sensors and instrumentation may be removable and reusable for monitoring of additional components.
    • 磁场或电场传感器安装在材料表面上,用于对诸如车辆传动系的旋转部件进行应力,应变和负载监测。 固定式传感器安装在组件周围的多个位置,用于评估组件在多个旋转位置的应力。 传感器响应通常被转换成诸如磁导率或导电性的材料性质,其考虑了传感器和安装表面之间可能存在的任何涂层厚度。 传感器不与旋转部件直接接触,并且通常安装在环绕旋转部件的环形材料或环上。 环形材料特性(如应力)的测量与旋转部件上的应力和部件上的离散特征有关。 作为具体示例,旋转部件是行星齿轮系统,其中传感器安装在齿圈上,并且分立的特征是承载板柱。 传感器优选地围绕部件的圆周以相等的距离安装。 传感器和仪器可能是可拆卸的,可重复使用,用于监控附加部件。