Fig. 5: Analytical simulation and experimental verification of the synchronous bidirectional ultrasound transmitting PMUT.
From: High frame rate ultrasonic flowmeter based on PMUT array with bidirectional acoustic beams
a The principle of generating the V-shaped bidirectional beam pattern through pitch design and sequential control, given by the numerical calculation. b The FEM simulation results of generating the V-shaped beam. c The experimental verification of the V-shaped beam generation. When the excitation pulse of the adjacent channels had an optimized interval time of ~2000 ns, a symmetric V-shaped beam pattern with bidirectional beams measured at 27° and 153° could be generated
