▎ 摘　　要

Flexibility, high durability, and high energy conservation are qualities of great concern in piezoelectric sensor fabrication. However, developing lightweight, versatile, and flexible piezoelectric sensors with high sensitivity is still a significant challenge. In this paper, we investigate the design and fabrication of a flexible piezoelectric sensor that is highly curved and includes a precisely aligned Polyvinylidene fluoride (PVDF)/Graphene (Gr) composite film as a piezoelectric active component attached by copper electrodes. The addition of Gr fillers to a PVDF matrix with a high loading quantity prompts the PVDF chains to self-assemble, resulting in a high beta-phase content with distinctive piezoelectric properties. In Finite Element Analysis (FEA), a curved design produces greater deformation than a flat design under different loading conditions. The curved sensor exhibits an excellent mechanical sensitivity of 0.35VN-1, which is an essential performance indicator for sensor-based human wearable devices. The F-score analysis is done to perform sensing data accuracy using K-mer-based Sensing Recognition (KSR). This tactile sensor design can easily attach to various human body parts for tracking real-time human motion. This simple and efficient fabrication process allows good versatility, and tests provide promising results for developing wearable piezoelectric sensing devices.