Goh, D. J., Sarafianou, M., Choong, D. S. W., Liu, J., Chen, D. S. H., Leotti, A., Cerini, F., Gianola, R., & Koh, Y. (2025). A Convex PMUT Array for High-Speed Wide-FoV Airborne Object Sensing. In (Editor), 2025 IEEE International Ultrasonics Symposium (IUS). https://doi.org/10.1109/ius62464.2025.11201311
Abstract:
This paper reports the application of an airborne
2D object sensing convex sparse-array PMUT system capable of
localizing reflectors within +/- 60° Field-of-View (FoV) in real
time. The proposed sensing system consists of a convex PMUT
array comprising 5 die pairs with a transmit (TX) chip and an
receive (RX) die in each pair. All TX dies are actuated
simultaneously towards Plane Wave Imaging using a novel
image reconstruction algorithm for object sensing. With each
TX-RX pair oriented to cover 30° individually, the system
collectively achieves a 120° FoV. The proposed system for
airborne object sensing is evaluated experimentally and attains
a 30° angular resolution at 7.2 frames per second (FPS) through
a Localized Delay-And-Sum (LDAS) approach. This work
demonstrates the practical feasibility and provides a proof of
concept for a high-speed, wide-FoV embedded ultrasound
sensing system operating across a curved interfacial surface,
eliminating the need for dynamic beam steering within a
simplified system architecture.
License type:
Publisher Copyright
Funding Info:
This research / project is supported by the A*STAR Research Entities - Piezo Specialty Lab-in-a-Fab 2.0
Grant Reference no. : I2301E0027