US 12,014,809 B2
Calibration of orientations of a gyroscope of a motion tracking system
Pedro Henrique Oliveira Santos, Oporto (PT); Luís Ungaro Pinto Coelho, Oporto (PT); Marta Maria Ramalho Ferreira, Oporto (PT); Ana Clara Ferreira Matos, Oporto (PT); and Virgílio António Ferro Bento, Oporto (PT)
Assigned to SWORD HEALTH, S.A., Oporto (PT)
Appl. No. 17/604,671
Filed by SWORD HEALTH S.A., Oporto (PT)
PCT Filed Apr. 27, 2020, PCT No. PCT/EP2020/061653
§ 371(c)(1), (2) Date Oct. 18, 2021,
PCT Pub. No. WO2020/221704, PCT Pub. Date Nov. 5, 2020.
Claims priority of application No. 19398005 (EP), filed on Apr. 30, 2019.
Prior Publication US 2022/0215925 A1, Jul. 7, 2022
Int. Cl. G16H 20/30 (2018.01); A61B 5/00 (2006.01)
CPC G16H 20/30 (2018.01) [A61B 5/6823 (2013.01); A61B 5/6824 (2013.01); A61B 2560/0223 (2013.01); A61B 2562/0219 (2013.01); A61B 2562/0223 (2013.01)] 20 Claims
OG exemplary drawing
 
8. A motion tracking system comprising:
a computing device comprising at least one processor and at least one memory; and
first and second sensors, each sensor at least comprising a gyroscope;
the at least one processor is configured, together with the at least one memory, to:
digitally process orientations measured by the first and second sensors while a person having the first and second sensors arranged on an upper arm and a chest thereof, respectively, performs a predetermined movement, the orientations being processed so as to digitally compute an orientation difference between the orientations measured by the first sensor and the orientations measured by the second sensor; and
adjust operation of the motion tracking system based on the orientation difference computed;
wherein the predetermined movement comprises the person moving a torso thereof with respect to a hip of the person, and during the predetermined movement the upper arm is not rotated with respect to a shoulder of the person connected to the upper arm.