Figure 1:
Research methodology flowchart.
Figure 2:
Illustrative representation of power consumed by RFID reader, motion detector, and their combination.
Figure 3:
The options of integrating the motion detector.
Figure 4:
Block diagram of smart RFID system and a grid of smart RFID systems.
Figure 5:
Program flowchart of PIR sensor-based RFID system.
Figure 6:
Implementation of the optimal motion sensor-based smart RFID system.
Table 1.
The power consumption of smart and ordinary RFID systems.
| Ordinary system | Smart RFID system (Type B) | Smart RFID system (Type A) | ||||
|---|---|---|---|---|---|---|
| Module | Standby mode | Reading mode | Standby mode | Reading mode | Standby mode | Reading mode |
| MCU | / | / | 232.5 mw | 232.5 mw | / | / |
| PIR sensor | / | / | 170 µw | 170 µw | 170 µw | 170 µw |
| AC/DC converter | 455 mw | 455 mw | 0 | 455 mw | 455 mw | 455 mw |
| RFID reader | 3.15 w | 3.15 w | 0 | 3.15 w | 0 w | 3.15 w |
| Total | 3.605 w | 3.605 w | 232.7 mw | 3.838 w | 455.2 mw | 3.6052 w |
Figure 7:
The cumulative power drain in 24 hr of the studied RFID systems.