"Traditional presence detection often employs passive infrared (PIR), ultrasonic, or camera methods, which suffer from pain points such as blind detection zones, susceptibility to environmental temperature and light interference, high privacy risks, and difficulty in accurately distinguishing between static human bodies and objects, leading to a high rate of false alarms and missed alarms.

ToF technology, by actively emitting modulated light and measuring the reflection time, can precisely perceive the distance information of objects within its field of view. It remains unaffected by changes in illumination, effectively identifies static human presence, and avoids privacy issues arising from image acquisition. Characterized by fast response, wide coverage, and strong anti-interference capability, it is widely applicable to scenarios requiring reliable presence detection, such as smart buildings, security surveillance, and home appliance energy saving"