期刊
ACM TRANSACTIONS ON GRAPHICS
卷 39, 期 4, 页码 -出版社
ASSOC COMPUTING MACHINERY
DOI: 10.1145/3386569.3392492
关键词
Multi-point phase optimization; Parametric sound; Ultrasound Levitation; Mid-air haptics; Phased Arrays of Transducers
资金
- H2020 through their ERC Advanced Grant [787413]
- H2020 through FET Open grant (Levitate) [737087]
- AHRC UK-China Research-Industry Creative Partnerships [AH/T01136X/1]
- Royal Academy of Engineering through their Chairs in Emerging Technology Program
- AHRC [AH/T01136X/1] Funding Source: UKRI
Phased Arrays of Transducers (PATs) allow accurate control of ultrasound fields, with applications in haptics, levitation (i.e. displays) and parametric audio. However, algorithms for multi-point levitation or tactile feedback are usually limited to computing solutions in the order of hundreds of sound-fields per second, preventing the use of multiple high-speed points, a feature that can broaden the scope of applications of PATs. We present GS-PAT, a GPU multi-point phase retrieval algorithm, capable of computing 17K solutions per second for up to 32 simultaneous points in a mid-end consumer grade GPU (NVidia GTX 1660). We describe the algorithm and compare it to state of the art multi-point algorithms used for ultrasound haptics and levitation, showing similar quality of the generated sound-fields, and much higher computation rates. We then illustrate how the shift in paradigm enabled by GS-PAT (i.e. real-time control of several high-speed points) opens new applications for PAT technologies, such as in volumetric fully coloured displays, multi-point spatio-temporal tactile feedback, parametric audio and simultaneous combinations of these modalities.
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