Acceleration sensor

Details Acceleration sensor Acceleration sensor

1988-05-27

1990-05-08

Williams, Hezron E.

Measuring and testing

Speed, velocity, or acceleration

Acceleration determination utilizing inertial element

73517R, G01P 1508

Patent

active

049227530

ABSTRACT:
An acceleration sensor including a magnetic fluid, a permanent magnet emplaced movably in the magnetic fluid, a nonmagnetic case, in which case the magnetic fluid and the permanent magnet are sealed and from which case air is substantially excluded, the shape of internal receptacle of the case dominating the shape of the magnetic fluid, whereby the path of the magnetic flux generated by the permanent magnet is restricted and the permanent magnet in the magnetic fluid is given an automatic positioning function, a unit for detecting the position of the permanent magnet, and a processing circuit for processing signals from the detection unit.

REFERENCES:
patent: 4043204 (1977-08-01), Hunter et al.
patent: 4047439 (1977-09-01), Russell et al.
patent: 4498341 (1985-02-01), Breitbach et al.
patent: 4706498 (1987-11-01), Nemnich et al.
R. E. Rosenweig, "The Fascinating Magnetic Fluids", New Scientist, 20, Jan. 1966, pp. 146-148.

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