Abstract：Temperature control is an important step during the concrete curing. Aiming at the disadvantages of current concrete-temperature monitoring technologies, a passive Radio Frequency Identification (RFID) temperature sensor tag is designed for concrete temperature monitoring. The proposed RFID sensor tag is based on the EPC Generation-2 Ultra-High Frequency (UHF) communication protocol and operates in passive mode. Since the concrete is a lossy material, the total loss of electromagnetic wave transmitting in concrete is analyzed. And the working conditions of the RFID sensor tag in concrete are determined. The temperature calibration and communication performances of the proposed sensor tag were then measured. The temperature measured by the proposed sensor tag agrees well with the results measured by the conventional thermocouple with maximum 0.5℃temperature difference. The proposed temperature monitoring technique takes the advantages of high convenience, low cost and long lifespan.
