US 12,092,536 B1
Multi-modal pressure sensor
Chunlei Wang, Miami, FL (US); Borzooye Jafarizadeh, Miami, FL (US); Azmal Chowdhury, Miami, FL (US); Iman Khakpour, Miami, FL (US); and Nezih Pala, Miami, FL (US)
Assigned to The Florida International University Board of Trustees, Miami, FL (US)
Filed by Chunlei Wang, Miami, FL (US); Borzooye Jafarizadeh, Miami, FL (US); Azmal Chowdhury, Miami, FL (US); Iman Khakpour, Miami, FL (US); and Nezih Pala, Miami, FL (US)
Filed on Apr. 14, 2023, as Appl. No. 18/300,745.
Int. Cl. G01L 1/18 (2006.01); A61B 5/00 (2006.01)
CPC G01L 1/18 (2013.01) [A61B 5/00 (2013.01); A61B 2562/0247 (2013.01); A61B 2562/0261 (2013.01); A61B 2562/12 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A wearable multi-modal pressure sensor (WMMPS) for detection and intelligent monitoring of weak human physiological signals, the WMMPS comprising three pressure sensors vertically stacked within a common sensor footprint, the three pressure sensors comprising:
a supercapacitive or strain gauge sensor;
a piezoresistive sensor; and
a capacitive sensor,
the piezoresistive sensor comprising an upper surface in direct physical contact with a lower surface of the supercapacitive or strain gauge sensor,
the piezoresistive sensor comprising a plurality of patterned micro-pyramids disposed on a lower surface of the piezoresistive sensor opposite from the upper surface thereof,
the plurality of patterned micro-pyramids being in direct physical contact with an upper surface of the capacitive sensor,
the piezoresistive sensor further comprising a porous polydimethylsiloxane (PDMS) and multiwalled carbon nanotube (MWCNT) composite-based dielectric layer,
the plurality of patterned micro-pyramids being arranged on one side of the porous PDMS and MWCNT composite-based dielectric layer, and
the PDMS and MWCNT composite-based dielectric layer comprising about 1.6 wt % of MWCNT.