Fig. 1. System overall structure diagram

Fig. 2. Internal structure of PIR

Fig. 3. Sensor node reference model

Fig. 4. Experimental real picture

Fig. 5. Diagram of one-dimensional convolutional neural network structure

Fig. 6. Diagram of GRU network structure

Fig. 7. Structure diagram of 1DCNN-GRU model

Fig. 8. Flowchat of algorithm implementation

Fig. 9. Original signal diagram of five actions

Fig. 10. Loss function of the model

Fig. 11. Training accuracy of the model