Boots – shoes – and leggings
Patent
1993-03-31
1996-01-16
Ramirez, Ellis B.
Boots, shoes, and leggings
364453, G01C 1908, G01C 1928
Patent
active
054854059
ABSTRACT:
An improved electro-mechanical inertial rotation sensor comprising a rotor which spins at substantially constant speed with respect to an inertial frame of reference. A pickoff generates a signal relating the rotational position of the rotor relative to the apparatus, as a function of time. A phase comparator compares this pickoff signal to a reference signal relating the rotational position of the rotor relative to a fixed orientation in an inertial frame of reference, as a function of time. Changes in phase between the two signals indicate changes in orientation of the apparatus with respect to the inertial frame of reference. In one embodiment, the rotor is driven through an Eddy current coupling and simultaneously braked by an Eddy current brake, in a matched torque drive. To generate an accurate reference signal, the rotations of the rotor with respect to the inertial frame of reference are accurately determined using parallel measurements from a similar rotor, used as a test rotor.
REFERENCES:
patent: 3793737 (1974-02-01), Alth
patent: 4192189 (1980-03-01), Presley
patent: 4269073 (1981-05-01), McIntyre
patent: 4416066 (1983-11-01), Romacker
patent: 4445375 (1984-05-01), Wells
patent: 4449191 (1984-05-01), Mehnert
patent: 4675820 (1987-06-01), Smith et al.
patent: 4706389 (1987-11-01), Eisenhammer
patent: 5048963 (1991-09-01), Ignagni
patent: 5067084 (1991-11-01), Kau
patent: 5172323 (1992-12-01), Schmidt
Davies, E. J., An Experimental and Theoritical Study of Eddy Current Couplings and Brakes, IEEE Transactions on Power Apparatus and Systems, PAS No. 68, Aug. 1963, pp. 401-417.
Singh, A., Theory of Eddy-Current Brakes With Thick Rotating Disc, Proc. IEE, vol. 124, No. 4, Apr. 1977, pp. 373-376.
Udd, E., Fiberoptic VS Ring Laser Gyros: An Assessment of the Technology, LaserFocus/Electro-Optics, Dec. 1985, pp. 64-74.
Venkataratnam, K. and Raju, B. E., Analysis of Eddy-Current Brakes With Nonmagnetic Rotors, Proc. IEE, vol. 124, No. 1, Jan. 1977, pp. 67-71.
Venkataratnam, K. and Kadir, M. S. A., Normalized Force-Speed Curves of Eddy Current Brakes With Ferromagnetic Loss Drums, IEEE Transactions on Power Apparatus and Systems, vol. PAS-104, No. 7, Jul. 1985, pp. 1789-1796.
Kemper M.
Ramirez Ellis B.
LandOfFree
Inertial rotation sensing apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Inertial rotation sensing apparatus and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Inertial rotation sensing apparatus and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-314564