Electrostatic accelerometer

专利名称：Electrostatic accelerometer发明人：FERRISS; LINCOLN S.申请号：US38177173申请日：19730723公开号：US3877313A公开日：19750415

摘要：In a digital pendulous accelerometer an electrostatic pulsed torque rebalanceloop is used to restore the seismic mass to a null position by means of separatelyenergized capacitive torquer plates facing opposite sides of the pendulum. When thependulum is displaced to one side of null, the torquer plate which will drive thependulum toward null is energized via a constant current loop in response to a binarypulse output indicative of the direction of displacement at regular sampling intervals. Thedifference in the number of pulses indicative of displacement to either side of null over atime period spanning a number of sampling intervals is proportional to the magnitude ofthe change in velocity over the time period. Accuracy is independent of the location ofthe pendulum between the torquer plates because, by virtue of the constant currentloop, the torque - producing field intensity in the gap between the pendulum and eitherplate is independent of the pendulum location.

申请人：THE SINGER COMPANY

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