Wireless Readout System for Pressure Monitoring Using FFF-Printed Mold Fabricated Flexible Piezoresistive Sensors

Flexible piezoresistive pressure sensors are critical components in wearable technology, extensively utilized in domains such as healthcare and sports analytics. However, achieving optimal sensitivity for different applications across diverse pressure ranges remains challenging. This paper presents a novel approach to fabricating these sensors using a synthesized graphene-polydimethylsiloxane (PDMS) ink and fused filament fabrication (FFF) printed molds, which allows precise control over sensor layer thickness. The innovative combination of the PDMS-graphene ink with the FFF-printed molds results in customizable sensor performance tailored to diverse pressure ranges. Additionally, a compact, portable data acquisition system built on a printed circuit board (PCB) is introduced. This wireless PCB efficiently collects and transmits data from the fabricated sensors, showcasing a scalable, cost-effective solution for comprehensive pressure monitoring across various applications.