Brachistochrone Bowl-Inspired Hybrid Nanogenerator Integrated with Physio-Electrochemical Multi-Sensors for Self-Sustainable Smart Pool Monitoring Systems

This paper proposes a self-sustainable smart pool monitoring system that continuously monitors various physio-electrochemical properties of pool water in real-time without external power. The system includes an electromagnetic generator inspired by the Brachistochrone bowl to harvest energy from random water motion, powering a wireless transmission unit and a multifunctional sensor unit.

• A self-sustainable, autonomous smart pool monitoring system.
• A novel Brachistochrone bowl-inspired electromagnetic generator for energy harvesting from water motion.
• Integration of a multifunctional sensor unit for pH, temperature, chlorine, conductivity, and wave motion.
• Real-time wireless transmission of sensor data to a custom mobile application.

A smart pool monitoring system (SPMS) was developed with a Brachistochrone bowl-inspired generator and a custom-designed multifunctional sensor unit. The system's performance was evaluated by its power generation from random motion and the sensitivity and accuracy of its sensors in both indoor and outdoor environments. The entire system was demonstrated in real-time.

The generator produced a peak power of 72 mW at 4 Hz and 0.5 g acceleration, sufficient to power the system. The multifunctional sensors showed adequate sensitivity and accuracy in detecting minor variations in water quality. The SPMS successfully acquired and wirelessly transmitted sensor data to a mobile app, demonstrating a portable and autonomous solution for pool monitoring.