| 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)] | 13 Claims |
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1. A method of fabricating a wearable multi-modal pressure sensor (WMMPS) for detection and intelligent monitoring of weak human physiological signals, the method comprising:
fabricating a supercapacitive or strain gauge sensor;
fabricating a piezoresistive sensor;
fabricating a capacitive sensor;
defining a sensor footprint and placing the capacitive sensor within the sensor footprint;
assembling the piezoresistive sensor on top of the capacitive sensor and within the sensor footprint;
assembling the supercapacitive or strain gauge sensor on top of the piezoresistive sensor and within the sensor footprint; and
connecting each of the supercapacitive or strain gauge sensor, the piezoresistive sensor, and the capacitive sensor, respectively, to a respective pair of sensor leads, each respective pair of sensor leads configured and adapted to transmit signals generated by the respective 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 fabricating of the piezoresistive sensor comprising assembling a porous polydimethylsiloxane (PDMS) polymer and multiwalled carbon nanotube (MWCNT) composite-based dielectric layer comprising the plurality of patterned micro-pyramids on top of a conductive layer, with the plurality of patterned micro-pyramids in contact with the conductive layer, and
the PDMS and MWCNT composite-based dielectric layer comprising about 1.6 wt % of MWCNT.
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