The core lies in the precise perception of the surrounding environment and the user's status by intelligent devices. The key components include temperature and humidity sensors, air quality sensors, infrared sensors, human presence sensors, biometric sensors (fingerprints/heart rate), and image sensors, etc. The main functions include collecting environmental parameters in all scenarios (such as indoor temperature and humidity, PM2.5 concentration), identifying user status (such as intelligent wearable heart rate monitoring, human presence detection), and warning of abnormal scenarios (such as gas leakage detection), providing precise data support for the automatic response and scenario-based services of intelligent devices, and making the devices more in line with user needs and environmental changes.