SAW sensor can realize wireless passive operation,which makes it an important application prospect in high-speed rotating parts testing.SAW sensor was designed and fabricated with Langasite piezoelectric crystal.The strain sensitivity charac-teristics of the SAW resonator was studied and the SAW resonator was successfully applied to the wireless test of rotor blade strain.The results show that the resonance frequency of the prepared SAW sensor is 217.794 MHz and the quality factor reaches 5 807.The strain sensitivity of the SAW resonator is about-317 Hz/με.The strain of the rotator blade was measured wirelessly in the range of 3 000 to 15 000 r/min.The measurement results of SAW sensor are basically agree with that of the foil strain gauge and Finite Element Method simulation.The research results can provide references for SAW resonator's applications in wireless measurement.
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