公开(公告)号：WO1992009897A1

公开(公告)日：1992-06-11

申请号：PCT/US1991008676

申请日：1991-11-22

Applicant: APPLIED TECHNOLOGY ASSOCIATES, INC.

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

IPC: G01P09/00

CPC classification number: G01P9/00 ,  G01P3/46

Abstract: A magnetohydrodynamic angular rate sensor is described. A housing (30) supports first and second fluid proof masses in respective coaxial annular channels (11, 17), permitting relative motion between the proof masses and the housing. First and second magnets (12, 18) associated with each annular channel (11, 17) result in an electric potential being generated across each channel proportional to the relative circumferential velocity between the proof masses and the housing. The annular channels are connected together to form a continuous pumped fluid circuit which introduces a radial flow velocity in each channel. At low rotational frequencies, a circumferential velocity component is induced in the proof masses due to Coriolis acceleration which results in a measurable electrical voltage across the annual channels. The low frequency response of the sensor is therefor extended to lower frequencies.