Sefar provides a mass-producible generic fabric for sensors which allow the measurement of various activities of human bodies by capacitive, resistive and/or bio-impedance mode.
The most interesting sensing mode represents the pressure resistive sensor.
The sensor consists of two fabrics with an array of metallic conductive parallel stripes as electrodes and a third fabric as semi-conductive intermediate layer (see graphic).
As the sensor area is pressed, the resistance decreases (see graphic). The resistance-pressure relationship is predictable and repeatable and resistance is insensitive to other physical variables.
The fabric pressure sensor shows sensor function properties having by far the most sensitive structure in the response.
Sefar Sensing Fabrics were developed in the frame of the European Project SimpleSkin.
Sensing with fabrics
The PowerSens fabrics are woven fabrics usually consisting of PET and electrically conductive filaments.
PowerSens fabric properties
Able to sense physical quantities such as conductivity, temperature and elongation
Electrical insulation available
Light weight (< 90 g/m2, filament diameters 40 – 80 µm)
High air permeability (> 8000 l/m2/s, depending on fabric design)
Compatible to injection mold processes
Examples of applications
SEFAR PowerSens fabrics are customer-specifically developed and manufactured.
Physical quantities such as temperature, elongation, liquid levels etc. can be measured through Sefar fabrics.
Unobtrusive measurement of physical quantities
Fabric can be formed to fit any shape
Sefar supports you by helping you specify the properties necessary for your product.