Airbag Helmet: Design and Analysis of Helmet Piezoelectric Accelerometer

Abstract The author invented an airbag helmet to provide effective protection for two-wheeled vehicle riders. This paper illustrates the desion and analysis of this Helmet Piezoelectric Accelerometer. Analysis is based on the finite element model of solid mechanics (e.g. linear elasticity and piezoelectricity) with a carefully selected software of COMSOL Multiphysics. Finite element analysis method helped the author to reduce the need for physical prototypes in design process. With a high degree of accuracy, the author modeled complex material physical deformations with detailed visualization and solved the problem. Equations were used for calculation during the process. This paper provides the design of comsol-based solid mechanics and piezoelectricity simulation and simulates the process of converting the mechanical vibration into voltage signals by using piezoceramics, so as to supply power to the airbag accelerometer and release the airbag in time. The reliability and safety of the design are verified by means of the mechanical and electrical simulation. In case of a traffic accident, the airbag will inflate instantly and form a balloon-shaped helmet wrapping the rider’s head to secure the head effectively.