Generating Ultrasonic Acoustic Holograms with Circular Arrays
Submission Type
Event
Faculty Advisor
Gabe Spalding
Expected Graduation Date
2019
Location
Center for Natural Sciences, Illinois Wesleyan University
Start Date
4-13-2019 9:00 AM
End Date
4-13-2019 10:00 AM
Disciplines
Education
Abstract
Acoustic holograms are formed by interfering multiple sonic sources of identical frequency and differing phase. By using ultrasonic transducers, 3D printed arrays, it is possible to computer generate holographic arrays at 40 kHz in different configurations. Various algorithms can then be used to model three-dimensional geometries generated from the fourier transform of the phase delays of the array. By using circular arrays, I am able to explore vortex generation in an ultrasonic environment with a cost-effective desktop setup. These holograms can be measured and plotted using another transceiver attached to an X-Y plotter. This work demonstrates how to build and control this set-up, and opens up the ability to do research with ultrasonic holograms by future students. I show how to both control and measure a hologram through a LabVIEW environment, and suggest points of optimization for future more powerful arrays.
Generating Ultrasonic Acoustic Holograms with Circular Arrays
Center for Natural Sciences, Illinois Wesleyan University
Acoustic holograms are formed by interfering multiple sonic sources of identical frequency and differing phase. By using ultrasonic transducers, 3D printed arrays, it is possible to computer generate holographic arrays at 40 kHz in different configurations. Various algorithms can then be used to model three-dimensional geometries generated from the fourier transform of the phase delays of the array. By using circular arrays, I am able to explore vortex generation in an ultrasonic environment with a cost-effective desktop setup. These holograms can be measured and plotted using another transceiver attached to an X-Y plotter. This work demonstrates how to build and control this set-up, and opens up the ability to do research with ultrasonic holograms by future students. I show how to both control and measure a hologram through a LabVIEW environment, and suggest points of optimization for future more powerful arrays.