Active Infrared light power supply for indoor wireless sensor nodes

Sammanfattning: In order to expand the energy source in energy harvesting, this thesis explores the feasibility of using infrared light source as the energy source. Firstly, the thesis investigated the current energy harvesting solution and the way of using infrared light energy, and determined the use of crystalline solar panels as energy harvesters. By testing the illu-mination characteristics of the infrared light source, a wireless sensor node based on active infrared light energy is designed to verify the reliability of the energy harvesting system. The node uses the BQ25505 as a power management circuit to store energy in the supercapacitor and power the system load through the boost convertor of the TPS61020. The load is a CMWX1ZZABZ wireless module based on LoRa network communication. The thesis measures the energy conversion efficiency of each part of the system. Through data analysis and evaluation, it is considered feasible to use the infrared light source as the energy source of the wireless sensor node.