US 12,287,207 B2
Rotation sensing and magnetometry using localization on a ring shaped lattice
Kunal Das, Reading, PA (US)
Assigned to Kutztown University of Pennsylvania of the State System of Pennsylvania, Kutztown, PA (US)
Filed by KUTZTOWN UNIVERSITY OF PENNSYLVANIA OF THE STATE SYSTEM OF PENNSYLVANIA, Kutztown, PA (US)
Filed on Dec. 23, 2021, as Appl. No. 17/645,850.
Application 17/645,850 is a continuation of application No. 16/617,894, granted, now 11,243,079, previously published as PCT/US2019/060903, filed on Nov. 12, 2019.
Claims priority of provisional application 62/787,502, filed on Jan. 2, 2019.
Prior Publication US 2022/0120566 A1, Apr. 21, 2022
Int. Cl. G01C 19/58 (2006.01); G01D 1/14 (2006.01); G01D 1/16 (2006.01); G01R 33/032 (2006.01)
CPC G01C 19/58 (2013.01) [G01R 33/032 (2013.01); G01D 1/14 (2013.01); G01D 1/16 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method for operating a sensor system, the sensor system comprising: a plurality of waveguides arranged in a circular array, with refractive indices of the plurality of waveguides modulated, to generate a ring-shaped artificial lattice structure with modulated site depths; and a detection unit including a processor configured to measure distribution of light output from the artificial lattice structure, the method comprising:
determining magnitude and direction of rotation from a resulting pattern of localization in an intensity distribution of the light after the system is subject to the rotation for a duration of time by causing the processor to:
a) establish a prior distribution for a full range of possible magnitudes and orientations of rotation;
b) establish a prior distribution for a full range of possible degrees of localization;
c) establish a probability for observing or measuring a degree of localization conditioned upon a known magnitude and orientation of rotation by propagating the medium for the duration of time subject to that magnitude and orientation of rotation; wherein:
step c) is repeated for different magnitudes and directions of rotation covering the full range established in a), at intervals that provide predetermined levels for precision and accuracy;
d) determine a magnitude and orientation of an unknown subsequent rotation of interest based on an observed or measured degree of localization after a duration of time evolution from a multiplicative product of the established prior distribution from step a) and the established conditional probability from step c), normalized by the prior distribution from step b), wherein the degree of localization is that of a distribution of intensities of light detected from the individual waveguides that form the artificial lattice structure.