GS-PAT
GS-PAT
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GS-PAT
DOI：
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发表时间：
2020
影响因子：
6.2
通讯作者：
Sriram Subramanian
中科院分区：
文献类型：
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作者：
Diego Martínez Plasencia;Ryuji Hirayama;Roberto A. Montano Murillo;Sriram Subramanian
相控阵换能器（PAT）允许精确控制超声场，应用于触觉、悬浮（即显示器）和参数音频。然而，用于多点悬浮或触觉反馈的算法通常限于每秒数百个声场的数量级的计算解决方案，从而防止使用多个高速点，这一特征可以拓宽PAT的应用范围。我们提出了GS-PAT，一种GPU多点相位检索算法，能够在中端消费级GPU（NVidia GTX 1660）中每秒计算17 K解决方案，最多可同时计算32个点。我们描述了该算法，并将其与用于超声触觉和悬浮的最先进的多点算法进行比较，显示出所生成的声场的相似质量和更高的计算速率。然后，我们说明了如何在GS-PAT（即几个高速点的实时控制）启用范式的转变打开PAT技术的新应用，如在体积全彩色显示器，多点时空触觉反馈，参数音频和这些方式的同时组合。
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.