FLEXIBLE CAPACITIVE PRESSURE SENSOR AND RESPIRATION MONITOR USING THE SAME

摘要

A capacitive pressure sensor includes first and second of mutually displaceable elastic members each having a respective electrically conductive surface separated by a thin elastic dielectric. Variations in area of pressure-induced contact between the first and second members are used to vary capacitance of the sensor that allows determination of differential pressure between the two elastic members. Both of the elastic members have respective projections, the projections of the first elastic member being disposed in interlocking relationship with the projections of the second elastic member and configured so that as the elastic members are pressed toward each other their respective projections progressively engage and create increasing areas of contact.

主权项

1. A capacitive pressure sensor comprising first and second of mutually displaceable elastic members each having a respective electrically conductive surface separated by a thin elastic dielectric, wherein:
variations in area of pressure-induced contact between the first and second members are used to vary capacitance of the sensor that allows determination of differential pressure between the two elastic members; and both of the elastic members have respective projections configured so that as the elastic members are pressed toward each other their respective projections progressively engage and create increasing areas of contact; the projections of the first elastic member being disposed in interlocking relationship with the projections of the second elastic member such that when the respective projections in the opposing surfaces engage each other they cannot be completely separated by lateral displacement along two mutually orthogonal axes.