Piezoelectric-Powered Air Quality Monitoring and Accident Detection System

This work develops a smart energy-efficient air quality monitoring system operated by piezoelectric technology harvesting energy from foot pressure. The system is monitoring environmental toxic gasses such as CO, CO2, which provides real -time data to assess environmental conditions. In parallel, this work also detects car accident using YOLOv11. This double function system not only promotes environmental awareness and public health but also improves traffic safety by enabling rapid emergency reactions. The self -directed design ensures little maintenance and high reliability, making it a viable solution for smart city infrastructure and sustainable urban development.