Characteristic Analysis of a Chipless RFID Sensor Based on Multi-Parameter Sensing and an Intelligent Detection...

Area of Science:

• Electrical Engineering
• Materials Science
• Civil Engineering

Background:

• Chipless radio frequency identification (RFID) is crucial for structural health monitoring (SHM).
• Current research primarily focuses on mechanical properties, neglecting multi-physical parameters like temperature and humidity in SHM.
• A need exists for compact sensors capable of detecting multiple environmental parameters.

Purpose of the Study:

• To propose a novel multi-parameter chipless RFID sensor for SHM.
• To integrate temperature and humidity sensing capabilities into a single, compact device.
• To develop an efficient method for real-time data acquisition and transmission for engineering applications.

Main Methods:

• Design of a multi-parameter chipless RFID sensor utilizing microstrip coupling.
• Implementation of a 4-bit ID code for sensor identification.
• Integration of temperature and humidity sensing functionalities.
• Development of a lightweight dynamic spectrum detection and wireless transmission platform using a vector network analyzer (VNA).

Main Results:

• The sensor demonstrates a sensitivity of approximately 2.18 MHz/RH for relative humidity.
• The sensor exhibits a sensitivity of about 898.63 KHz/°C for temperature.
• The developed platform enables real-time extraction and wireless transmission of RFID spectrum sensing data.
• The proposed engineering application method is more flexible and economical than traditional experimental setups.

Conclusions:

• The proposed multi-parameter chipless RFID sensor effectively detects temperature and humidity for SHM.
• The developed lightweight platform provides a cost-effective and flexible solution for real-time monitoring.
• This technology advances SHM by enabling comprehensive environmental parameter assessment.