研究目的
Designing and simulation of a wearable RFID patch for food spoilage monitoring using smart packaging and NFC technology to read temperature data.
研究成果
The RFID patch with a circular antenna and MLX90129 chip was successfully designed and simulated, enabling temperature monitoring for food spoilage. The translucent FPC version performed better than transparent PET, with accurate temperature display via custom Android app. Future improvements could involve optimizing antenna shape and size for better aesthetics and functionality, and integrating additional sensors for parameters like humidity or gas intensity.
研究不足
The patch has limited reading distance (within 3cm for some materials), reading time of about 4 seconds, and performance issues with certain materials like PET due to high resistance. Manufacturing complexities and material costs (e.g., silver with glue) affect performance. Temperature variations can influence antenna functionality.
1：Experimental Design and Method Selection:
The design involves creating a flexible RFID patch with a circular antenna for NFC communication at
2：56MHz, using the MLX90129 chip with an internal temperature sensor. Simulation software HFSS is used for antenna design, and Altium for PCB layout. Sample Selection and Data Sources:
The patch is fabricated with Polyethylene Terephthalate (PET) and Polyimide materials for flexibility and transparency.
3：List of Experimental Equipment and Materials:
Includes MLX90129 chip, silver conductive material, PET and Polyimide substrates, HFSS and Altium software, Android apps (NFC Taginfo, NFC Tools, and a custom app FNFCV) for reading data.
4：Experimental Procedures and Operational Workflow:
Design the antenna using Archimedes spiral equations, simulate inductance and resistance, fabricate the patch, and test recognition and temperature reading using NFC-enabled devices.
5：Data Analysis Methods:
Analyze antenna performance through simulation results (inductance, resistance) and practical testing with apps to verify temperature data transmission.
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