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    Low stress magnet interface for a force rebalance accelerometer
    12.
    发明授权
    Low stress magnet interface for a force rebalance accelerometer 失效
    低应力磁体界面，用于力平衡加速度计

    公开(公告)号：US5587530A

    公开(公告)日：1996-12-24

    申请号：US420916

    申请日：1995-04-12

    Applicant: Steven A. Foote ,  Damon R. Stoddard

    Inventor： Steven A. Foote ,  Damon R. Stoddard

    IPC: G01P1/00 ,  G01P15/125 ,  G01P15/13 ,  G01P15/08

    CPC classification number: G01P1/006 ,  G01P15/125 ,  G01P15/132

    Abstract: A force rebalance accelerometer includes a proof mass suspended by one or more flexures between stationary mounted upper and lower excitation rings. Pick-off capacitance plates formed on opposing sides of the proof mass form capacitance elements whose capacitance varies in response to displacement of the proof mass to provide a displacement signal. The displacement signal is applied to one or more electromagnets, used to force the proof mass back to a null or at-rest position. The drive current applied to the electromagnets thus represents the force or acceleration applied to the accelerometer. The electromagnets include a magnet and a pole piece which forms a magnetic return path. In order to relieve stresses due to thermal expansion, the magnet is spaced apart from the pole piece to enable the bonding area to be constrained to a minimum which, in turn, reduces the overall stress on the accelerometer.

    Abstract translation: 力重平衡加速度计包括通过固定安装的上和下激励环之间的一个或多个挠曲物悬挂的检验质量块。 拾取电容板形成在检测质量体的相对侧上的电容元件，其电容响应于证明块的位移而变化以提供位移信号。 位移信号被施加到一个或多个电磁体，用于迫使质量块回到空或静止位置。 因此，施加到电磁体的驱动电流表示施加到加速度计的力或加速度。 电磁铁包括形成磁返回路径的磁铁和极片。 为了减轻由于热膨胀引起的应力，磁体与极片间隔开，使得接合面积被限制在最小限度，这又降低了加速度计上的整体应力。

    Low stress magnet interface
    13.
    发明授权
    Low stress magnet interface 失效
    低应力磁铁接口

    公开(公告)号：US5532665A

    公开(公告)日：1996-07-02

    申请号：US184527

    申请日：1994-01-21

    Applicant: Steven A. Foote ,  Damon R. Stoddard

    Inventor： Steven A. Foote ,  Damon R. Stoddard

    IPC: G01P1/00 ,  G01P15/125 ,  G01P15/13 ,  G01P15/08 ,  H01F1/00

    CPC classification number: G01P1/006 ,  G01P15/125 ,  G01P15/132

    Abstract: A force rebalance accelerometer includes a proof mass suspended by one or more flexures between stationary mounted upper and lower excitation rings. Pick-off capacitance plates formed on opposing sides of the proof mass form capacitance elements whose capacitance varies in response to displacement of the proof mass to provide a displacement signal. The displacement signal is applied to one or more electromagnets, used to force the proof mass back to a null or at-rest position. The drive current applied to the electromagnets thus represents the force or acceleration applied to the accelerometer. The electromagnets include a magnet and a pole piece which forms a magnetic return path. In order to relieve stresses due to thermal expansion, the magnet is spaced apart from the pole piece to enable the bonding area to be constrained to a minimum which, in turn, reduces the overall stress on the accelerometer.

    Abstract translation: 力重平衡加速度计包括通过固定安装的上和下激励环之间的一个或多个挠曲物悬挂的检验质量块。 拾取电容板形成在检测质量体的相对侧上的电容元件，其电容响应于证明块的位移而变化以提供位移信号。 位移信号被施加到一个或多个电磁体，用于迫使质量块回到空或静止位置。 因此，施加到电磁体的驱动电流表示施加到加速度计的力或加速度。 电磁铁包括形成磁返回路径的磁铁和极片。 为了减轻由于热膨胀引起的应力，磁体与极片间隔开，使得接合面积被限制在最小限度，这又降低了加速度计上的整体应力。

    Whiffletree accelerometer
    15.
    发明授权
    Whiffletree accelerometer 失效

    公开(公告)号：US06662658B2

    公开(公告)日：2003-12-16

    申请号：US10052713

    申请日：2002-01-17

    Applicant: Steven A. Foote

    Inventor： Steven A. Foote

    IPC: G01P1510

    CPC classification number: B81B3/0051 ,  B81B2201/0235 ,  B81B2203/056 ,  B81B2203/058 ,  G01P15/097 ,  G01P2015/0828

    Abstract: An apparatus and method for suspending two or more force-versus-displacement sensors for measuring displacement of a pendular structure relative to a frame structure, wherein a suspension structure includes the frame and pendular structures, the pendular structure having a base structure suspended from the frame structure for rotation about a first axis, a beam structure spaced away from the first axis, and a flexure suspending the beam structure from the base structure for rotation about a second axis that is substantially perpendicular to the first axis. The flexure suspending the beam structure from the base structure is positioned substantially intermediate between suspension positions of the force-versus-displacement sensors, and constrains the beam structure to motion substantially within the plane of the pendular structure.

    Accelerometer with improved support rim isolation
    18.
    发明授权
    Accelerometer with improved support rim isolation 失效
    加速度计具有改进的支撑轮缘隔离

    公开(公告)号：US5763779A

    公开(公告)日：1998-06-09

    申请号：US725193

    申请日：1996-09-13

    Applicant: Steven A. Foote

    Inventor： Steven A. Foote

    IPC: G01P1/00 ,  G01P15/13 ,  G01P15/08

    CPC classification number: G01P1/00 ,  G01P15/132

    Abstract: An accelerometer is of the type in which a paddle is suspended from a support so that the paddle is displaceable with respect to the support. A suspension arrangement for the paddle includes a pair of compliant beams having longitudinal axes that are substantially orthogonal to each other so that the beams provide compliant isolation to internal stresses while being rigid to external loading forces.

    Abstract translation: 加速度计的类型是桨叶从支撑件悬挂，使得桨叶相对于支撑件可移位。 用于桨叶的悬挂装置包括一对柔性梁，其具有基本上彼此正交的纵向轴线，使得梁在对外部加载力具有刚性的同时提供与内部应力的顺应隔离。

    Accelerometer with rebalance coil stress isolation
    19.
    发明授权
    Accelerometer with rebalance coil stress isolation 失效
    加速度计具有回弹线圈应力隔离

    公开(公告)号：US5111694A

    公开(公告)日：1992-05-12

    申请号：US569398

    申请日：1990-08-17

    Applicant: Steven A. Foote

    Inventor： Steven A. Foote

    IPC: G01P15/08 ,  G01P1/00 ,  G01P15/13

    CPC classification number: G01P15/132 ,  G01P1/006

    Abstract: An improved technique for mounting a coil to a paddle in a force rebalance accelerometer so as to provide relief from temperature induced strains without increasing the mass of the proof mass. The coil is mounted to the paddle at a plurality of mounting sites on the paddle, at least one of which is connected to the paddle by suspension means compliant for movement in the plane of the paddle. In a preferred arrangement, three mounting sites are used, two of which are moveable towards and away from the third, fixed mounting site.

    Abstract translation: 一种用于将线圈安装到力重新平衡加速度计中的桨的改进技术，以便在不增加校准质量的质量的情况下提供缓解温度诱导应变。 线圈在桨上的多个安装位置处安装到桨上，桨叶中的至少一个通过悬挂装置连接到桨板，用于在桨叶的平面中移动。 在优选的布置中，使用三个安装位置，其中两个安装位置可朝向和远离第三固定安装位置移动。

    Time interval trimmed differential capacitance sensor
    20.
    发明授权
    Time interval trimmed differential capacitance sensor 有权
    时间间隔微分电容传感器

    公开(公告)号：US07368923B2

    公开(公告)日：2008-05-06

    申请号：US11317383

    申请日：2005-12-22

    Applicant: Steven A. Foote

    Inventor： Steven A. Foote

    IPC: G01R27/26 ,  H03K5/01

    CPC classification number: G01D5/24

    Abstract: An apparatus and method for operation of a differential capacitance transducer, including generating substantially opposing polarity excitation drive signals by operation of a pair of drive signal generators, applying the excitation drive signals to a pair of sense capacitors of a differential capacitance sensor, sensing a differential capacitance at a common junction between the pair of sense capacitors; and individually controlling the drive signal generators for trimming a null bias of the sense capacitor pair at the common junction.

    Abstract translation: 一种用于操作差分电容换能器的装置和方法，包括通过一对驱动信号发生器的操作产生基本上相反的极性激励驱动信号，将激励驱动信号施加到差分电容传感器的一对感测电容器，感测差分电容 在一对感测电容器之间的公共连接处的电容; 并且单独地控制驱动信号发生器以修剪在公共接点处的感测电容器对的零偏置。

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