Based on polypyrrole-biochar composite conductive hydrogel for vehicle non-contact blind spot monitoring

With the development of the economy and advancements in sensing technology, it is become feasible to develop intelligent, safe and low-carbon vehicles. Traditional monitoring methods rely on high-cost detection equipment, and the continuous power supply required for numerous on-board sensors consumes a significant amount of the vehicle's electrical energy, thereby shortening the vehicle's range. Against this backdrop, this paper proposes a low-cost, self-powered non-contact triboelectric nanogenerator (FSS-TENG) with excellent short-range detection capability, which can be used as a sensor for monitoring vehicle blind spots. The FSS-TENG is fabricated using a conductive composite hydrogel based on polypyrrole (ppy) and biochar, endowing it with outstanding performance. Meanwhile, we have improved the device structure, which greatly enhances the output signal of the non-contact triboelectric nanogenerator. Experimental verification shows that the FSS-TENG can generate electricity stably during both vertical and horizontal sliding motions. It can be attached to the rear side, both sides, and the tail of the vehicle to realize blind spot vehicle detection, providing a safe, sustainable, and highly sensitive technical solution for vehicle blind spot monitoring.