  Microacoustic wave devices are essential components in the RF electronics and
MEMS industry with increasing impact in various sensing and actuation
applications. Reliable and smart operation of acoustic wave devices at low
costs would cause a crucial advancement. Herein, we present the enablement of
temperature and mechanical sensing capabilities in a Rayleigh-mode standing
surface acoustic wave (sSAW) chip device by harnessing an acoustic shear plate
wave mode using the same set of electrodes. Most importantly, this mode is
excited by switching the polarity of the sSAW transducer electrodes by simple
electronics, allowing for direct and inexpensive compatibility with an existing
setup. We validated the method in the emergent topic of surface de-icing by
continuously monitoring temperature and water liquid-solid phase changes using
the plate wave mode, and on-demand Rayleigh-wave deicing with a negligible
energy cost. The flexibility for adapting the system to different scenarios,
loads and scalability opens the path to impact in lab-on-a-chip, IoT
technology, and sectors requiring autonomous acoustic wave actuators.
