Israel’s Caaresys is developing a passenger-monitoring system based on RF (radiofrequency), camera-free technology to make cars safer. It utilizes vital signs to detect the location, health condition, and state of each occupant. Caaresys has just been acquired by Harman, a subsidiary of Samsung.
https://www.calcalistech.com/ctechnews/article/hksaboexj
https://www.youtube.com/watch?v=IwLMKQeDlak
https://finder.startupnationcentral.org/company_page/caaresys