RFMonitor: Monitoring smoking behavior of minors using COTS RFID devices

The protection laws of minors in various countries have clearly banned minors from smoking. However, due to various social factors and the psychological conditions of minors, smoking among minors cannot be effectively controlled. A typical example is that many countries ban smoking in public places, and many places have special smoking areas. Previous work designed wearable sensor devices or used wireless signals (e.g., WIFI and Bluetooth etc.) to identify smoking activities. System deployment and implementation are rarely considered in existing system application scenarios. Here, we show that we can use the backscatter signal of the passive RFID tag, combined with the improved radio frequency chromatographic imaging technology, to analyze the RSSI signal of the human smoking action. Therefore, the system is specially designed for application scenarios and can realize the height detection of minors and the recognition of smoking behavior. In the end, related comparative experiments were also carried out to verify the effectiveness and real-time performance of the system. Aiming at the classification problem of different age groups, this paper proposed to distinguish population categories and identify smoking behaviors by analyzing RSSI signals extracted from commercial readers. Finally, the validity and real-time performance of the system are verified by comparative experiments.