Real-time measurement quality evaluation for passive and wireless resonant SAW sensor

The passive wireless surface acoustic wave (SAW) sensors are advantageous for the applications under harsh environmental conditions. The wireless transmission poses great challenges in the measurement quality due to the passive SAW sensors have no signal processing ability. This paper proposes a method to predict the measurement quality. The proposed approach is evaluated in simulations and practical experiments. The measurement quality prediction results are identical to the practical standard deviation.