US 11,679,036 B2
Determining diaper loading using color detection or activity state
Brian Schiffer, San Francisco, CA (US); Tushar Parlikar, Somerville, MA (US); and Brian Ward Guilardi, San Jose, CA (US)
Assigned to VERILY LIFE SCIENCES LLC, South San Francisco, CA (US)
Filed by Verily Life Sciences LLC, South San Francisco, CA (US)
Filed on Apr. 12, 2019, as Appl. No. 16/383,337.
Prior Publication US 2020/0323700 A1, Oct. 15, 2020
Int. Cl. A61F 13/42 (2006.01); A61B 5/11 (2006.01); A61B 5/00 (2006.01); G06N 20/00 (2019.01); G01N 21/55 (2014.01); G01P 13/00 (2006.01); G01J 1/42 (2006.01); G01N 21/25 (2006.01); A61F 13/84 (2006.01)
CPC A61F 13/42 (2013.01) [A61B 5/11 (2013.01); A61B 5/6808 (2013.01); G01J 1/4204 (2013.01); G01N 21/251 (2013.01); G01N 21/55 (2013.01); G01P 13/00 (2013.01); G06N 20/00 (2019.01); A61B 2503/04 (2013.01); A61B 2562/0219 (2013.01); A61F 2013/422 (2013.01); A61F 2013/424 (2013.01); A61F 2013/8491 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for predicting a loading of an absorbent article, the method comprising:
obtaining a first measurement of ambient light received from a photodetector while a light source is off;
obtaining a second measurement from the photodetector while the light source is transmitting light, the second measurement comprising a measurement of the ambient light and the transmitted light reflected from the absorbent article;
determining a normalized measurement of light reflected from an absorbent article by removing an ambient light signal from the second measurement based on the first measurement of ambient light;
determining, from the normalized measurement of light, a presence of urine in the absorbent article;
determining, from a time series of data including an inertial measurement for each of a set of time periods, an activity state of an infant wearing the absorbent article; and
determining a degree of fullness of the absorbent article, wherein the determining is based on (i) an elapsed time since the determination of the presence of urine and (ii) the activity state.