A Multiparameter Integration Method and Characterization Study of Chipless RFID Sensors With Spiral Shape
Guochun Wan, Zicheng Jiang, Liyu Xie
Abstract
In the field of Structural Health Monitoring (SHM), with the development of Chipless Radio Frequency Identification (RFID) technology, various single-parameter sensors have gradually moved towards integration, such as strain and encoding, temperature and humidity, and other multi-parameter sensors. However, due to the fixed structure of these multi-parameter sensors, their states cannot be flexibly controlled, and it is difficult to distinguish and locate them when multiple sensors exist simultaneously. In this paper, a novel chipless RFID sensor for multi-parameter sensing is designed. The sensor integrates encoding, humidity, and strain measurements without using a traditional chip-based design. A broadband antenna is also designed to match the operating frequency band of the sensor. This integration of multiple parameters is made possible by the sensor’s unique design and the use of a compatible antenna, which enables the measurement of different physical parameters simultaneously. Furthermore, flexible combinations of the three parameters are achieved through wired or wireless reconfiguration methods, which allow for the sensor’s states to be reconfigured during measurement. As a result, this sensor can achieve multiple states, making it more versatile and efficient in monitoring various parameters. In the future, this approach could be combined with self-powering devices and more advanced wireless modules to achieve long-term state control of sensors in large-scale infrastructure structures, providing a new method for modern building health monitoring applications, from integrated sensor control to sensor differentiation and localization.