High Spatial Resolution Midair Tactile Display Using 70 kHz Ultrasound
High Spatial Resolution Midair Tactile Display Using 70 kHz Ultrasound
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使用 70 kHz 超声波的高空间分辨率空中触觉显示器
DOI：
10.1007/978-3-319-42321-0_6
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
Hiroyuki Shinoda
中科院分区：
文献类型：
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作者：
Mitsuru Ito;Daisuke Wakuda;Seki Inoue;Yasutoshi Makino;Hiroyuki Shinoda
我们制作了一个空中触觉显示器使用70千赫机载超声波。与传统的40 kHz超声触觉显示器相比，显示器的空间分辨率提高了1.75倍。由于焦斑直径小于指垫，因此用户可以感知指垫上的局部点。在确定物理性质的实验中，我们发现70 kHz下的超声衰减与40 kHz下的超声衰减相当。利用该理论成功地产生了预期的小焦斑。心理物理实验结果表明，在40和100 Hz调制下，70 kHz焦斑的最小可感知辐射力平均小于40 kHz焦斑，且较小的焦斑更容易被感知。我们还进行了感知力面积与真实的接触的比较测试。
We fabricated a midair tactile display using a 70 kHz airborne ultrasound. The spatial resolution of the display was improved 1.75 times compared with the conventional 40 kHz ultrasound tactile display. Since the focal spot diameter was smaller than a finger pad, the user could perceive a localized spot on the finger pad. In the experiment determining the physical properties, we found that the ultrasound attenuation at 70 kHz was comparable to that at 40 kHz. The small focal spot was successfully created as expected using the theory. The psychophysical experimental results showed that the minimum perceivable radiation force for the focal spot of 70 kHz was smaller than that for the 40 kHz case in average under 40 or 100 Hz modulations, and the smaller focal spot was easier to perceive. We also conducted a comparison test of the perceived force area with real contacts.