Why mmWave radar?Automotive radar system can be classified based on their range of sensing objects:
- Short Range: They can detect up to 30 m of distance from the vehicle. They are primarily placed in the rear corners to perform blind spot detection, read collision warning and cross-traffic alert and parking assistance.
- Mid and Long-range: Medium range radar is in 30-80 m range and Long-range radar is for more than 80 m range. These can operate in 76-81 GHz of frequency range. These are used for AEBS (Advanced Emergency Braking System) and ACC (Adaptive Cruise Control) technologies.
Child presence detection with mmWave RadarNSC has reported that on an average 39 children under the age of 15 die each year from heatstroke after being left in a vehicle. As a result, HOT CARS act was created that required the Transportation Department to mandate all new vehicle to have a child presence detection system.
1. Child presence detection systemEuro NCAP has also added child presence detection as their roadmap feature. Although the camera-based driver monitoring system can be used to detect the child’s presence, it might not be able to function properly if it’s not under the camera’s view. Nowadays automakers use a variety of technologies such as weight sensors along with a camera to get the right result, but they too have limitations. The limitations we are talking about is the presence of low or excessive light or if the child is in the child seat is not angled correctly or if the child is covered with a blanket. In such scenarios, radar comes into play. Millimetre-wave technologies can be an effective way for child detection because it can’t be blocked. It can pass through materials such as plastic and clothing or even if they are covered by blankets. Camera-based passenger detection is useful in most of the scenarios but radar works as an add on by providing accuracy and flexibility by giving the correct count of passengers. Its uses don’t end here.
2. Driver Monitoring SystemAlong with camera-based driver monitoring system it can create an in-cabin scenario which can provide a better system for seat-belt reminder and airbag deployment. For example, a weight sensor calculates a person’s presence by measuring if the object on the seat weighs more than a certain threshold. The limitation here is that it can be anything that is equal to the size and weight of the person but radar can detect the difference between the two. In the case of airbags, the radar can detect the size of the person and whether it’s an adult or a child and deploy the airbags as per the requirements. After Hot Cars Act and Euro NCAP roadmap came into picture, automakers and Tier One suppliers are trying their best to devise an in-cabin sensor for child presence detection. The solution has to be non-intrusive and that can be easily integrated into the vehicles. mmWave radar can not only change the way the vehicles study their surrounding environment but they can also sense the vehicle’s occupants. Currently, it’s very much possible to use a single mmWave radar sensor to detect and identify the occupants and identify them as adult or a child and show their vital signs. Due to their ability to sense through solid materials, radar can easily detect an unattended child with higher accuracy than ever before. Fortunately, we have already developed such product. Want to know more about it? Leave us a mail at firstname.lastname@example.org.