Study on the Influence of Flexible Pressure Sensing Array Unit Arrangement on Force-Sensitive Characteristics

To study the influence of the shape and arrangement of the array in flexible pressure sensors on their force-sensitive characteristics, based on the piezoresistive characteristics of graphene, the COMSOL Multiphysics finite element simulation software is used to conduct research on the influence of the shape and arrangement of the pressure-sensitive film layer on the force-sensitive characteristics. The simulation results show that when an external load of 100 kPa is applied under the same area, the maximum deformation of the square film is 0.455507 mm, the maximum deformation of the circular film is 0.565305 mm, the maximum deformation of the regular hexagonal film is 0.528622 mm. When regular hexagonal array units are arranged in a honeycomb shape, the array has a higher response degree to pressure, and the honeycomb arrangement can greatly improve the space utilization rate of the array. The minimum arrangement duty cycle for accurately identifying the pressure distribution needs to reach more than 40%.