Dielectric ring resonators as chipless temperature sensors for wireless machine tool monitoring

Temperature monitoring of tools is one key method for the prediction and detection of tool failure to prevent damage of valuable workpieces, e. g. in aircraft manufacturing. Therefore, a chipless wireless dielectric temperature sensor for machine tools, with very high temperature capability and compatibility to the harsh machine tool environment, is investigated. Based on these findings, a demonstrator is introduced that is characterized in the lab and tested in a real machine tool. The paper focuses on real world challenges of the sensor system implementation.