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    • 2. 发明申请
    • MEMS gyroscope with horizontally oriented drive electrodes
    • 具有水平定向驱动电极的MEMS陀螺仪
    • US20050284222A1
    • 2005-12-29
    • US10881499
    • 2004-06-29
    • Burgess JohnsonMark Weber
    • Burgess JohnsonMark Weber
    • B81B3/00G01P15/125
    • G01C19/5719
    • Devices and methods for reducing rate bias errors and scale factor errors in a MEMS gyroscope are disclosed. A MEMS actuator device in accordance with an illustrative embodiment of the present invention can include at least one substrate including one or more horizontal drive electrodes, and a movable electrode spaced vertically from and adjacent to the one or more horizontal drive electrodes. The horizontal drive electrodes and/or movable electrode can be configured to eliminate or reduce rate bias and scale factor errors resulting from the displacement of the movable electrode in the direction of a sense axis of the device.
    • 公开了用于降低MEMS陀螺仪中的速率偏差误差和比例因子误差的装置和方法。 根据本发明的说明性实施例的MEMS致动器装置可以包括至少一个包括一个或多个水平驱动电极的基板以及与一个或多个水平驱动电极垂直间隔开并与之相邻的可动电极。 水平驱动电极和/或可移动电极可以被配置为消除或减少由于可移动电极在装置的感测轴线方向上的位移而引起的速率偏差和比例因子误差。
    • 6. 发明申请
    • ADAPTIVE CIRCUITS AND METHODS FOR REDUCING VIBRATION OR SHOCK INDUCED ERRORS IN INERTIAL SENSORS
    • 自适应电路和减少惯性传感器振动或震动感应误差的方法
    • US20070227247A1
    • 2007-10-04
    • US11277686
    • 2006-03-28
    • Mark Weber
    • Mark Weber
    • G01P15/00
    • G01C19/5776G01C19/5726
    • Adaptive circuits and methods for reducing vibration-induced bias errors in inertial sensors are disclosed. An adaptive circuit for reducing vibration or shock induced errors in an inertial sensor having a proof mass and sense electrode may include a sense bias voltage source, a charge amplifier, a means for detecting and/or anticipating an external vibration or shock on the inertial sensor, and a means for selectively dampening the proof masses and/or adjusting the gain sensitivity of the charge amplifier in response to an external vibration or shock on the inertial sensor. A dampening resistive element may be provided to dampen the proof mass motion in response to an external vibration or shock on the inertial sensor. Alternatively, or in addition, the gain sensitivity of the rate signal outputted by the charge amplifier can be adjusted in response to an external vibration or shock on the inertial sensor. During operation, the dampening and/or gain sensitivity can be adjusted to prevent signal saturation or clipping from occurring in the sense electronics, allowing the inertial sensor to continue functioning during periods of vibration or shock.
    • 公开了用于减少惯性传感器中的振动引起的偏差误差的自适应电路和方法。 用于减少具有检测质量和感测电极的惯性传感器中的振动或冲击诱发误差的自适应电路可以包括感测偏置电压源,电荷放大器,用于检测和/或预测惯性传感器上的外部振动或冲击的装置 以及用于响应于惯性传感器上的外部振动或冲击而选择性地衰减校准质量和/或调整电荷放大器的增益灵敏度的装置。 可以提供阻尼电阻元件,以便响应于惯性传感器上的外部振动或冲击而抑制证明质量运动。 或者或另外,可以响应于惯性传感器上的外部振动或冲击来调整由电荷放大器输出的速率信号的增益灵敏度。 在操作期间,可以调节阻尼和/或增益灵敏度,以防止信号饱和或限制在感测电子设备中发生,从而允许惯性传感器在振动或冲击期间继续运行。
    • 7. 发明授权
    • Rotomolding process with reduced cycle times
    • 滚动过程减少循环时间
    • US07201864B2
    • 2007-04-10
    • US10886928
    • 2004-07-08
    • Mark WeberPhilippa HockingStephen John BrownChristopher John Brooke Dobbin
    • Mark WeberPhilippa HockingStephen John BrownChristopher John Brooke Dobbin
    • B29C41/04
    • B29C41/003B29C41/04B29K2023/0625B29K2105/0088C08L23/0815C08L2205/02C08L2205/025C08L2666/06
    • The cycle time for a rotomolding process is improved through the use of a molding material comprising a blend of at least two polyethylenes having narrow molecular weight distributions and homogeneous comonomer distributions. Alternatively, the molding temperature may be reduced to conserve energy and reduce energy costs. The polyethylene blend also has a narrow molecular weight distribution of less than 3 and a density of from 0.930 to 0.950 g/cc. Rotomolded parts prepared from the blend composition have excellent impact resistance and are also resistant to warpage. A preferred process employs a blend composition which contains a blend component having a higher molecular weight and a lower density than another blend component—this blend may be used to prepare rotomolded parts with warpage resistance and improved environmental stress crack resistance (ESCR). A highly preferred process uses a blend composition which further contains a minor amount (from 0.5 to 10 weight %) of a third ethylene blend component which has a higher molecular weight and density—this highly preferred composition may be used to prepare rotomolded parts having warpage resistance, very good ESCR and comparatively high modulus (or stiffness).
    • 通过使用包含具有窄分子量分布和均相共聚单体分布的至少两种聚乙烯的共混物的模塑材料,改进了滚塑过程的循环时间。 或者,可以降低成型温度以节省能量并降低能量成本。 聚乙烯共混物还具有小于3的窄分子量分布和0.930至0.950g / cc的密度。 由共混组合物制备的卷筒纸部件具有优异的抗冲击性,并且也耐翘曲。 一种优选的方法采用共混组合物,它含有具有比另一共混组分更高的分子量和较低密度的共混组分 - 该混合物可用于制备具有抗翘曲性和改善的耐环境应力开裂性(ESCR)的滚塑部件。 高度优选的方法使用进一步含有少量(0.5至10重量%)具有较高分子量和密度的第三乙烯共混物组分的共混组合物 - 该高度优选的组合物可用于制备具有翘曲的滚塑部件 电阻,非常好的ESCR和较高的模量(或刚度)。
    • 8. 发明申请
    • QUADRATURE REDUCTION IN MEMS GYRO DEVICES USING QUAD STEERING VOLTAGES
    • 使用四分之一转向电压的MEMS陀螺仪器中的平衡减少
    • US20060213265A1
    • 2006-09-28
    • US10907131
    • 2005-03-22
    • Mark WeberRobert Smith
    • Mark WeberRobert Smith
    • G01P3/44
    • G01C19/5719
    • Devices and methods for reducing quadrature motion in a MEMS-type gyroscope are disclosed. A MEMS-type gyroscope in accordance with an illustrative embodiment of the present invention can include one or more proof masses configured to oscillate in a drive plane above a sense electrode for measuring Coriolis forces exerted on the one or more proof masses resulting from motion of the gyroscope about an input axis. One or more quad steering voltage members can be positioned adjacent each of the one or more proof masses and activated to electrostatically attract the proof masses toward the sense electrodes to reduce quadrature motion of the proof masses. A levitation force can be induced in certain embodiments to further reduce quadrature motion of the proof masses, if desired.
    • 公开了用于减小MEMS型陀螺仪中的正交运动的装置和方法。 根据本发明的说明性实施例的MEMS型陀螺仪可以包括一个或多个证明质量块,其构造成在感测电极上方的驱动平面中振荡,以测量施加在一个或多个证明质量上的科里奥利力, 关于输入轴的陀螺仪。 一个或多个四方向转向电压部件可以位于与一个或多个检验质量块中的每一个相邻的位置,并被激活以将检测质量静电吸引到感测电极,以减小证明质量块的正交运动。 如果需要,在某些实施方案中可以诱导悬浮力来进一步减小检验质量块的正交运动。