Wireless LC Conformal Temperature Sensor Based on Ag Film (9912-K FL) for Bearing Temperature Measurement

As the key component of aero-engines and industrial gas turbines, a bearing’s working temperature at high speed is close to [Formula: see text]. The measurement of an engine bearing’s temperature is of great significance to ensure flight safety. In this study, we present a wireless LC conformal temperature sensor for bearing temperatures, which integrates silver on the bearing surface in situ through a screen-printing process. This process makes Ag film (9912-K FL) firmly adhere to the bearing surface and realizes wireless measurements for bearing temperatures in situ. A high-temperature holding experiment of the prepared sensor was conducted, and the results showed that the sensor can work stably for [Formula: see text] h at [Formula: see text]. We tested the designed wireless LC conformal temperature sensor at [Formula: see text]. The results showed that the proposed temperature sensor attained as good accuracy and stability in the temperature range [Formula: see text]. The sensitivity of the temperature measurements was [Formula: see text] when the bearing rotateds, the maximum repeatability was [Formula: see text] , the maximum uncertainty was [Formula: see text] , and the relative error was stable within [Formula: see text].