Fig. 4: Design proposal of a new SAW gyroscope based on PM and its characteristics.
From: A novel gyroscope based on the slow surface acoustic wave in a phononic metamaterial
a Proposed phase velocity-modulated SAW gyroscope, consisting of two sensing delay lines (containing PM) and a reference (blank) delay line. Based on the gyroscopic effects of PM, angular velocity can induce a rate-dependent phase difference between reference and sensing delay lines, as well as a direction-dependent amplitude difference between upper and lower sensing delay lines. b Simulation model of proposed gyroscope. The BIDTs on the 40% Sc-doped AlN piezoelectric film are employed. The excitation/receiving electrodes of IDT are set with voltage/floating and ground terminals. c ILs of reference delay line with different numbers of electrode pairs. d ILs of sensing delay line with different length of PM
