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Vital Signs Detection Reference Design

2021-04-02

Cars have been part of the lifestyle of many more families as people today are getting better off. In the meantime, however, we become no stranger to car accidents and incidents, among which leaving children unattended in hot cars can have real consequences.

This is when mmWave radar comes into play. Apart from advanced driver assistance system (ADAS) features like adaptive cruise control (ACC) and autonomous emergency braking (AEB) enabled by its ability to sense the surrounding environment, mmWave radar can detect the presence and position of human bodies in the cabin and even vital signs like respiration rate.

Calterah provides AiP-based mmWave radar reference design for in-cabin human body detection. Once a car is parked and locked, the radar mounted to it starts to detect the respiration and body movements in the cabin. Whenever there is any kid or pet left behind, an alarm will be sounded before a tragedy takes place.

Specifications of the radar are as follows:

Working frequency 77–81 GHz; 60–64 GHz
Output power 12 dBm
Detection range 0–2.5 m
Azimuth FOV ±60°
Elevation FOV ±40°
Range resolution 0.05 m
Refreshing cycle 1.6 s