US 12,419,582 B2
Smart bed system
Nikhil Autar, Voyager Point (AU); and Nick Rabey, Macquarie Park (AU)
Assigned to CENTERED AROUND YOU PTY LTD, Kensington (AU)
Appl. No. 17/283,687
Filed by CENTERED AROUND YOU PTY LTD, Kensington (AU)
PCT Filed Oct. 10, 2019, PCT No. PCT/AU2019/051096
§ 371(c)(1), (2) Date Apr. 8, 2021,
PCT Pub. No. WO2020/073091, PCT Pub. Date Apr. 16, 2020.
Claims priority of application No. 2018903834 (AU), filed on Oct. 10, 2018.
Prior Publication US 2021/0345968 A1, Nov. 11, 2021
Int. Cl. A61B 5/00 (2006.01); A61B 5/024 (2006.01); A61B 5/08 (2006.01); A61B 5/11 (2006.01); A61G 7/018 (2006.01); A61G 7/057 (2006.01)
CPC A61B 5/6892 (2013.01) [A61B 5/0004 (2013.01); A61B 5/024 (2013.01); A61B 5/0816 (2013.01); A61B 5/1117 (2013.01); A61B 5/4094 (2013.01); A61B 5/4818 (2013.01); A61B 5/7275 (2013.01); A61B 5/746 (2013.01); A61G 7/018 (2013.01); A61G 7/05776 (2013.01); A61B 2562/0247 (2013.01); A61B 2562/0271 (2013.01)] 21 Claims
OG exemplary drawing
 
18. A sensor mat system, comprising:
a pressure sensor layer comprising a plurality of spatially distributed sensors that are each configured to generate a pressure signal in response to a force applied to the sensors;
a deformable layer disposed on the pressure sensor layer;
a piezoelectric sensing layer disposed on the deformable layer, the piezoelectric sensing layer comprising a deformable piezoelectric or piezoresistive material disposed between a first electrically conductive element sub-layer and a second electrically conductive element sub-layer, the first electrically conductive element sub-layer and the second electrically conductive element sub-layer each comprising electrically conductive elements arranged in a grid configuration, the electrically conductive elements electrically coupled to a power source that provides an electric current through the electrically conductive elements and, when a drop in voltage is detected in the electric current through the electrically conductive elements due to stretch of the deformable piezoelectric or piezoresistive material, causes generation of one or more signals indicating a change in conductance of the electric current; and
a processor communicatively coupled to the sensors of the pressure sensor layer and the electrically conductive elements of the piezoelectric sensing layer, the processor configured to:
generate pressure data indicative of a spatial distribution of pressure across the sensor mat system based on the pressure signals received from each of the spatially distributed sensors of the pressure sensor layer in combination with the one or more signals from the piezoelectric sensing layer,
determine a position, movement patterns, and physiological signals of a subject or object on the sensor mat system from the generated pressure data, and
calibrate the one or more signals generated by the piezoelectric sensing layer based on the pressure signals received from each of the spatially distributed sensors of the pressure sensor layer to account for changes in stretch of the deformable piezoelectric or piezoresistive material over time.