A 3D Printed, Constriction-Resistive Sensor for the Detection of Ultrasonic Waves

Abstract. Ultrasonic waves, either bulk waves or guided are commonly used for non-destructive evaluation, example in structural health monitoring. Traditional sensors detecting ultrasonic include metallic strain gauges and piezoelectric ceramics. Recently piezoresistive nanocomposites have emerged as a promising sensor with high sensing range. In this paper, constriction-resistive based made from graphene reinforced PLA filament is developed using fused deposition modelling 3D printing approach novel type of monitoring purposes. The very low-cost recyclable thermoplastic material, which lightweight can be directly printed onto the surface various engineering structures, embedded into interior structure via fabrication printing. These characteristics make candidate compared to traditional detect signals frequencies around 200 kHz, good signal-to-noise ratio sensitivity. When deployed between two adjacent tracks , exploiting kissing-bond mechanism, capable waves. Several confirmatory experiments were carried out on validate capability