طراحي و بررسي عملكرد حسگرهاي خازني مبتني بر منسوج با استفاده از نخ هاي دورپيچ

With the rise of smart textiles, the development of flexible an‎d wearable pressure sensors has become increasingly important. This study focuses on the design an‎d eva‎luation of capacitive structures based on core–wrapped yarns. The yarns were produced with a conductive steel-fiber core wrapped with a non-conductive layer. Capacitive structures were fabricated in two configurations—cross-type an‎d self-capacitor—an‎d the changes in capacitance under compressive force were measured. Arrays of these capacitors were then created to investigate the effects of various parameters, including insulation type, yarn length, spacing between yarns, array density, an‎d wrap diameter. An equivalent electrical circuit was also proposed. The results showed that increasing yarn length led to greater capacitance changes in both configurations. In the cross-type structure, a 2 cm spacing between yarns resulted in the largest capacitance change, while in the self-capacitor structure, a 0.5 cm spacing offered better performance. The wrap diameter did not show a consistent effect on capacitance variation . Among six types of insulating yarns tested, three-ply twisted FDY polyester (average sensitivity 0.164 µPa⁻¹) an‎d polypropylene (average sensitivity 0.0619 µPa⁻¹) outperformed the others. Overall, core–wrapped yarn-based capacitors, with their simple fabrication process an‎d low cost, represent a promising option for pressure sensors in smart textiles an‎d wearable devices

محسن شنبه , ابوالقاسم زيدابادي نژاد

محمد قانع , وحيد عبادي