The working principle of optical rain sensor is based on the principle of optical sensing. When raindrops fall on the sensor surface or pass through the sampling space of the sensor, they change the propagation path of light or block the light emitted by the light source, causing the light signal received by the receiver to change. This change in light signal is then converted into an electrical signal (such as voltage o corrente) . elaborando e analizzando il segnale elettrico, informazioni come il tempo in cui le gocce di pioggia passano attraverso lo spazio di campionamento e la quantità di pioggia può essere ottenuta .


