Design and Performance Evaluation of Flexible Printed Piezoresistive Strain Sensors for Parachute Canopy Measurement
摘要
Canopies and parachute lines experience high stresses during the opening phase. The study aims to measure the strain on these components to enhance our understanding of these materials and their life span. To avoid altering the parachute structure and affecting data accuracy, measurements are conducted non-intrusively. This necessitates designing and implementing a discreet and robust interface between sensors and textiles. Additionally, this project involves developing an electronic measurement device capable of recording data from embedded sensors. This study aims to develop flexible printed piezoresistive strain sensors at the surface of the textile components of a parachute canopy, with a focus on the meridional ribbons (textile elements that link two parachute canopy panels) since they bear the most intense strain. The characterization of the sensors in static and dynamic strain is crucial for understanding the sensing capabilities of the system (sensor + substrate + connections) and for adapting the data processing and analysis based on the sensing system’s gauge factor (GF). The GF represents the ratio of the relative change in electrical resistance to the mechanical strain, quantifying the sensitivity of a strain sensor. This study demonstrates the performance of printed piezoresistive sensors in measuring strain in textiles.