WiFi变身“管家” 智能家居设备实现无感服务

Core Insights - Tianjin University's network and cloud computing team has made significant advancements in wireless sensing technology, enabling WiFi signals to analyze human activity and provide corresponding services through smart home devices [1][2]. Group 1: Technology Development - The new high-precision sensing application allows for accurate determination of user location, status, and activities without the need for wearable devices, relying solely on WiFi signals [1]. - The principle behind this technology is that human movement disturbs WiFi signals, which can be analyzed using intelligent algorithms to perceive human position, posture, and behavior [1]. Group 2: Challenges to Implementation - Two major challenges need to be addressed for widespread adoption: deployment difficulty and sensing accuracy [2]. - Traditional deployment requires professional personnel to manually collect WiFi signals and input device locations, which is complex and time-consuming for average users [2]. - WiFi signals can be reflected or refracted by walls and furniture, leading to significant perception errors in real home environments compared to ideal laboratory conditions [2][3]. Group 3: Innovative Solutions - To tackle deployment issues, the team repurposed common household robotic vacuum cleaners as "data collectors" to gather environmental information while cleaning [2]. - The robotic vacuum can create two maps: one for the physical space and another for the WiFi signal, achieving an accuracy of 10 centimeters in locating devices like routers and smart speakers [3]. - A model has been developed to help the application understand the complex propagation paths of WiFi signals in real home environments, improving sensing accuracy [3].