A droplet sensor system is configured to detect the presence of droplets or other foreign bodies on the surface of a window. The sensor system emits light rays that are coupled into the window, where the window serves as a waveguide that guides the confined electromagnetic radiation across the window. Foreign bodies present on the surface of the glass outcouples a subset of the light as it propagates across the window, attenuating the power of outcoupled light measured at a photodetector mounted near an edge of the window. The system initiates a notification or a control action in response to detecting this attenuation of power due to outcoupling of the propagating light by foreign bodies.
Droplet sensor
2020-05-19
Patent
Electronic Resource
English
IPC: | G01N Untersuchen oder Analysieren von Stoffen durch Bestimmen ihrer chemischen oder physikalischen Eigenschaften , INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES / B60S SERVICING, CLEANING, REPAIRING, SUPPORTING, LIFTING, OR MANOEUVRING OF VEHICLES, NOT OTHERWISE PROVIDED FOR , Warten, Reinigen, Instandsetzen, Unterstützen, Anheben oder Rangieren von Fahrzeugen, soweit nicht anderweitig vorgesehen |