US 12,434,100 B2
Methods and apparatus for power expenditure and technique determination during bipedal motion
Wyatt Mohrman, Boulder, CO (US); Kun Li, Boulder, CO (US); Gus Pernetz, Louisville, CO (US); James Williamson, Broomfield, CO (US); Li Shang, Boulder, CO (US); and Robert P. Dick, Chelsea, MI (US)
Assigned to Stryd, Inc., Boulder, CO (US)
Filed by Stryd, Inc., Boulder, CO (US)
Filed on Feb. 1, 2022, as Appl. No. 17/590,390.
Application 17/590,390 is a continuation of application No. 15/463,261, filed on Mar. 20, 2017, granted, now 11,278,765.
Application 15/463,261 is a continuation of application No. PCT/US2015/051181, filed on Sep. 21, 2015.
Claims priority of provisional application 62/215,458, filed on Sep. 8, 2015.
Claims priority of provisional application 62/053,205, filed on Sep. 21, 2014.
Prior Publication US 2022/0296962 A1, Sep. 22, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A63B 24/00 (2006.01); A61B 5/00 (2006.01); A61B 5/11 (2006.01); A61B 5/16 (2006.01); A63B 69/00 (2006.01); G01C 21/16 (2006.01); G01L 5/00 (2006.01); G09B 19/00 (2006.01)
CPC A63B 24/0006 (2013.01) [A61B 5/1118 (2013.01); A61B 5/165 (2013.01); A61B 5/4866 (2013.01); A61B 5/6807 (2013.01); A61B 5/7271 (2013.01); A63B 24/0062 (2013.01); A63B 69/0028 (2013.01); G01C 21/166 (2020.08); G01C 21/188 (2020.08); G01L 5/00 (2013.01); G09B 19/0015 (2013.01); G09B 19/0038 (2013.01); A61B 2503/10 (2013.01); A61B 2560/0406 (2013.01); A61B 2562/0219 (2013.01); A63B 2024/0009 (2013.01); A63B 2220/12 (2013.01); A63B 2220/62 (2013.01); A63B 2220/74 (2013.01); A63B 2220/803 (2013.01); A63B 2220/836 (2013.01); A63B 2225/50 (2013.01); A63B 2230/00 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A system for measuring motion of a user during physical activity, the system comprising:
a housing configured to be attachable to a shoe of a user, the housing including a sensor platform disposed therein, the sensor platform comprising:
an inertial measurement unit (IMU), disposed within the housing, to acquire multi-axis motion data, the multi-axis motion representing motion of the system; and
an orientation sensor, disposed within the housing, to acquire orientation data at a sampling rate, the orientation data representing an orientation of the sensor;
a barometer to acquire air pressure data while the user is engaging in the physical activity;
a processor, operably coupled to the IMU, the barometer, and the orientation sensor; and
at least one memory, operably coupled to the processor, to store the multi-axis motion data and the orientation data, the at least one memory storing instructions that when executed by the processor cause the system to perform operations comprising:
calculating at least one of a velocity or a change in velocity of the sensor platform based on at least the multi-axis motion data; and
generating, based on the acquired air pressure data, a body forward-facing surface area of the user and a drag coefficient, an estimate of wind resistance experienced by the user during the physical activity;
generating an estimate of power expended by the user, based on the estimate of wind resistance and at least one of the velocity of the sensor platform or the change in velocity of the sensor platform.