Radiation Pressure Field Reconstruction for Ultrasound Midair Haptics by Greedy Algorithm With Brute-Force Search
Radiation Pressure Field Reconstruction for Ultrasound Midair Haptics by Greedy Algorithm With Brute-Force Search
复制标题
通过暴力搜索的贪婪算法重建超声空中触觉的辐射压力场
DOI：
10.1109/toh.2021.3076489
复制
发表时间：
2021
影响因子：
2.9
通讯作者：
H. Shinoda
中科院分区：
文献类型：
--
作者：
Shun Suzuki;M. Fujiwara;Yasutoshi Makino;H. Shinoda
使用超声相控阵的非接触式触觉呈现正在成为一种在裸露皮肤上提供触觉反馈而不限制用户运动的强大方法。在这种超声半空触觉中，通常需要同时产生多个超声焦点，这需要解决相控阵列中换能器的振幅和相位的逆问题。传统上，矩阵计算方法已被用于解决该逆问题。然而，当阵列中的控制点的数量和换能器的数量很大时，矩阵计算需要不可忽略的时间量。在这篇文章中，我们提出了一个简单的方法，基于贪婪算法和蛮力搜索来解决现场重建问题。该方法无需矩阵计算或目标场相位优化，直接优化目标场。实验结果表明，该方法可以再现目标声音的准确性超过80%。
Non-contact tactile presentation using ultrasound phased arrays is becoming a powerful method for providing haptic feedback on bare skin without restricting the user's movement. In such ultrasonic mid-air haptics, it is often necessary to generate multiple ultrasonic foci simultaneously, which requires solving the inverse problem of amplitudes and phases of the transducers in a phased array. Conventionally, matrix calculation methods have been used to solve this inverse problem. However, a matrix calculation requires a non-negligible amount of time when the number of control points and the number of transducers in the array are large. In this article, we propose a simple method based on a greedy algorithm and brute-force search to solve the field reconstruction problem. The proposed method directly optimizes the desired field without matrix calculation or target field phase optimization. The empirical results indicate that the proposed method can reproduce the target sound with an accuracy of more than 80%.