Application and Optimization of Passive Wireless Temperature Measurement Technology in Rotor Monitoring of Generator-Motor

Abstract

Temperature monitoring of generator-motor rotor is extremely challenging under conditions of high temperature, high-speed rotation, and strong electromagnetic interference. In response to this requirement, a passive wireless temperature measurement system based on Ultra-High Frequency (UHF) RFID is developed. This system realizes passive transmission of temperature data through electromagnetic coupling of RFID technology. Structurally, it adopts a multi-antenna layout and dynamic threshold adjustment to enhance the system's anti-interference capability and monitoring stability. Experimental results indicate that within a threshold range of 0.4 to 0.6, the system's sensitivity reaches 91.07%-94.44%, with specificity exceeding 91.84%. The relative error of the Long Short-Term Memory (LSTM) prediction model is below 1.5%, significantly improving the accuracy of temperature anomaly detection. In summary, this technical solution is suitable for real-time rotor temperature monitoring and fault early warning in complex environments.