A home that quietly watches over grandma — no cameras, no wearables

Yangang Xing's team at Nottingham Trent University has built a home-monitoring system that lets older people live independently longer without a single camera. Radar senses movement, heat sensors read posture as blurry blobs — never faces — and smart plugs notice when the kettle or TV goes quiet. Software learns each person's normal routine and flags what's off: a fall, a missed morning, fading mobility — alerting family or carers. Published in the peer-reviewed journal Sensors, it treats privacy as the point: safety that never watches you.