Preparation of PVDF films by electrospinning and their application in a human posture recognition system

This study prepared polyvinylidene fluoride/zinc oxide (PVDF/ZnO) piezoelectric films using electrospinning. The films were characterized using scanning electron microscopy (SEM) and X-ray diffraction (XRD), and their performance was tested to determine the optimal ZnO doping ratio of 15 wt%. Sensor sensitive elements were created using screen printing, and a non-array sensor layout was designed, resulting in a tactile sensor cushion. A pressure data acquisition system was developed using a microcontroller to collect sitting posture data. A posture recognition system was built using a support vector machine (SVM) classification algorithm, achieving a recognition accuracy of 88.33% with different kernel functions. Finally, the pressure distribution on the sensor array was displayed through a graphical interface.