Magnetohydrodynamic (MHD) actuator sensor

Details Magnetohydrodynamic (MHD) actuator sensor Magnetohydrodynamic (MHD) actuator sensor

2007-02-06

2007-02-06

Kwok, Helen (Department: 2856)

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

C073S504050, C073S504070

Reexamination Certificate

active

11239283

ABSTRACT:
An MHD sensor/actuator is provided for generating torque as well as sensing angular displacements around a sense/torque axis. A column of conductive liquid which rotates within a circumferential channel having an inner circumferential surface and outer circumferential surface provides an inertial proof mass, the relative motion of which within the channel generates a torque or represents a sensed displacement about the common axis of the circumferential channel. According to certain embodiments, a cylindrical column of magnets are located coaxially with the circumferential channel to produce a radially oriented magnetic field which is perpendicular to the common axis. According to other embodiments, a magnetic ring is provided coaxially with the circumferential channel to produce a magnetic field in the direction of the common axis.

REFERENCES:
patent: 4718276 (1988-01-01), Laughlin
patent: 5003517 (1991-03-01), Greer, Jr.
patent: 5067351 (1991-11-01), Laughlin
patent: 5176030 (1993-01-01), Laughlin
patent: 5461919 (1995-10-01), Laughlin
patent: 5665912 (1997-09-01), Laughlin
patent: 6173611 (2001-01-01), Laughlin

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