公开(公告)号：WO1991006869A1

公开(公告)日：1991-05-16

申请号：PCT/US1990006100

申请日：1990-10-25

Applicant: APPLIED TECHNOLOGY ASSOCIATES, INC.

Inventor： APPLIED TECHNOLOGY ASSOCIATES, INC. ,  LAUGHLIN, Darren

IPC: G01P15/08

CPC classification number: G01P3/44 ,  G01P7/00

Abstract: An electronic motion sensor is described, wherein in a cavity (20) formed in a case (11) of high flux density material supports a permanent magnet (28) at the bottom. The permanent magnet (28) has a north/south pole orientation in line with the cavity axis. A circular channel (20) is located above, having an axis coincident with the cavity axis and which is filled with mercury. A center contact post (21) is located long the cavity axis in contact with the mercury, extending upwards through the top of the channel. An amplifier circuit (29) supported on a header (27) of high flux density material is placed on top of the channel. The amplifier (27) amplifies the potential difference between the center contact post (21) and the case (11). The header (27) effectively seals the cavity of the case.

公开(公告)号：WO1993004521A1

公开(公告)日：1993-03-04

申请号：PCT/US1992006440

申请日：1992-08-04

Applicant: APPLIED TECHNOLOGY ASSOCIATES, INC.

Inventor： APPLIED TECHNOLOGY ASSOCIATES, INC. ,  LAUGHLIN, Darren

IPC: H02K05/24

CPC classification number: G03F7/709 ,  F16F7/1011 ,  H02K33/18

Abstract: An inertial linear actuator (12) for stabilizing a platform (11) against vibration is disclosed, including a movable coil (2) having windings (29) which may be energized, supported on an actuator guide (21) for movement. The actuator guide (21) is fixed to the platform (11) and a current is supplied to the movable coil (20) to generate a force for damping sensed vibrations on the platform surface. A multiplicity of permanent magnets (23) are disposed parallel to the actuator guide (21), and a current in the movable coil (20) results in force being introduced between the movable coil (20) and the stationary actuator guides (21). A control system is implemented on the platform (11) for providing a feedback signal from an accelerometer (14) coupled to the platform (11) to drive electronics. The drive electronics will produce a current having the magnitude and direction for creating the actuator force for damping the sensed disturbance.