US 12,085,461 B2
Pressure sensor laminated onto a textile sheet, a method for manufacturing thereof, and a pressure distribution sensing product
Maria Mathea Antonetta Burghoorn, Geldrop (NL); Peter Zalar, Eindhoven (NL); Jeroen Van Den Brand, Goirle (NL); Daniele Raiteri, Eindhoven (NL); and Edsger Constant Pieter Smits, Eindhoven (NL)
Assigned to Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO, 's-Gravenhage (NL)
Appl. No. 17/599,940
Filed by Nederlandse Organisatie voor toegepast-natuurwetenschappelijk onderzoek TNO, 's-Gravenhage (NL)
PCT Filed Apr. 17, 2020, PCT No. PCT/NL2020/050259
§ 371(c)(1), (2) Date Sep. 29, 2021,
PCT Pub. No. WO2020/214037, PCT Pub. Date Oct. 22, 2020.
Claims priority of application No. 19169780 (EP), filed on Apr. 17, 2019.
Prior Publication US 2022/0196492 A1, Jun. 23, 2022
Int. Cl. G01L 1/20 (2006.01); G01L 1/22 (2006.01)
CPC G01L 1/205 (2013.01) [G01L 1/2287 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A pressure sensor laminated onto a textile sheet to form a pressure sensing textile sheet, the pressure sensor comprising:
at least two adjacent electrically conductive leads disposed in a pattern on a face of a first elastomeric carrier; and
an electrically resistive layer formed of a resistive composite material for shunting the at least two adjacent electrically conductive leads, said electrically resistive layer disposed on a face of a second elastomeric carrier;
wherein the first elastomeric carrier and the second elastomeric carrier are stacked across a spacer such that the at least two adjacent electrically conductive leads face the electrically resistive layer across a gap defined by the spacer to form a pocket structure defining a gas confining structure that is filled with a gas that at least partly counters a force exerted on the pressure sensor,
wherein the first carrier including the at least two adjacent electrically conductive leads and the second carrier including the electrically resistive layer are stretchable so as to, upon receiving the force exerted in a direction across the gap, reduce the gap between the electrically resistive layer and the at least two adjacent electrically conductive leads to shunt the at least two adjacent electrically conductive leads with the resistive composite material over a contact area in dependence on the force to result in a pressure dependent electrical resistance between the conductive leads, and
wherein the pocket structure is provided with a relief structure of micro bumps and an opening to reduce the counter force of the gas, said opening being dimensioned to impede the gas from exiting the pocket.