Abstract
Ultrasonic phased array sensors consist of multiple elements excited by predetermined time-delayed pulses. The directivity of each element was used to propose a sound field calculation model that adds a directivity constraint for each element. The steering sound fields under different directivity constraints were simulated, and the results demonstrate that the directivity of each element significantly impacts the overall steering of sound beams. This demonstrates the feasibility of adding a directivity constraint when modeling sensor arrays. This brings the simulation results closer to actual sound propagation and provides more accurate technical support in the design and use of phased array sensor applications.
Highlights
Phased array ultrasonic techniques are widely employed for applications in various contexts.1–5 In phased array setups, ultrasonic sensors are composed of an array of small piezoelectric elements
Song and Kim realized calculating full three-dimensional (3D) radiation beam fields for array sensors both in the near- and far-field based on the boundary diffraction wave model
Ultrasonic array sensors consist of multiple elements excited by predetermined time-delayed pulses
Summary
Phased array ultrasonic techniques are widely employed for applications in various contexts. In phased array setups, ultrasonic sensors are composed of an array of small piezoelectric elements. Song and Kim realized calculating full three-dimensional (3D) radiation beam fields for array sensors both in the near- and far-field based on the boundary diffraction wave model.. Song and Kim realized calculating full three-dimensional (3D) radiation beam fields for array sensors both in the near- and far-field based on the boundary diffraction wave model.18 In these models, sound radiation from each element was assumed as nearly uniform in all directions. Research and experiments have shown that there is a field directivity in each element for phased array sensors, which can vary considerably depending on the parameters. This directly impacts the overall sound fields generated by the array. We propose a sound field model in which the directivity constraints for each element are considered for beam steering and focusing to bring the simulation results closer to actual sound propagation
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