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Most drivers check their mirrors before pulling away. Few check under the car.
China’s BYD is working on an AI system that could warn drivers if an animal or other living being is beneath a parked vehicle. The technology is still at the patent stage, but it shows how the automaker is pushing vehicle safety beyond lane alerts and parking cameras.
A small under-car blind spot can become a real safety risk, especially in places where cats, dogs, or strays seek warmth or shade beneath parked vehicles.
How the system works
According to ITHome, the AI system starts by taking a picture of the car’s lower area after the vehicle is powered off. That image becomes a reference point, almost like a “before” photo.
Before the vehicle moves again, a new real-time image is compared with the stored reference. Any area that looks different is flagged for a closer look.
The comparison helps the software avoid treating every shadow, dirt patch, leaf, or piece of road debris as a new concern. By narrowing the search to areas that changed, the system can focus on what may have appeared after the car was parked.
Once a changed area is detected, the software analyzes that spot to determine whether it could be a living being, such as an animal or a person, or ordinary road clutter.
BYD is also looking inside the car
BYD is applying the same safety thinking to the cabin.
ITHome reported that the company also announced an earlier patent for detecting occupants left inside a vehicle. Instead of cameras, the cabin system uses radar signals to check whether someone remains in the car.
One system watches the area around the vehicle through imaging and computer vision. Another checks the cabin through radar-based sensing.
Both patents point to the same product direction: vehicles that use different sensors for different safety problems, from cameras outside the car to radar inside the cabin.
China’s smart cars are competing on more than range
China’s EV market is already crowded with cars that use AI and software to feel more responsive to drivers.
At Auto China 2026 in Beijing, Xpeng said its latest AI model can respond to commands such as “park near the entrance to the shopping centre,” while Xiaomi showed an AI-powered operating system that can detect when drivers appear stressed and adjust lighting and music, The Guardian reported.
BYD’s patents take that idea in a more safety-focused direction. Instead of asking what a car can do for comfort or convenience, the company is looking at whether sensors can catch the moments people miss, such as a stray sleeping peacefully near a parked car or a child left inside during a busy day, early enough to prevent an accident or save a life.
The real challenge for drivers and automakers
If BYD’s under-car detection feature reaches production, the real question will be whether drivers trust it enough to act.
An alert only helps if it feels accurate. Frequent false alarms could lead drivers to dismiss the warning, while missed detections could undermine confidence in the feature.
Automakers would also have to decide how the alert should appear. A small dashboard icon may be easy to miss. On the other hand, a louder warning could frustrate drivers if it appears too often.
Future car safety may depend as much on driver response as detection. Spotting a risk is only one part of the challenge; getting someone to notice the alert and respond in time will decide whether features like this work in daily use.
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