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 |
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.
|