PixeLite: A Thin and Wearable High Bandwidth Electroadhesive Haptic Array
PixeLite: A Thin and Wearable High Bandwidth Electroadhesive Haptic Array
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DOI：
10.1109/toh.2023.3272635
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发表时间：
2023-10-01
影响因子：
2.9
通讯作者：
Edward Colgate，J.
中科院分区：
文献类型：
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作者：
Tan，Sylvia;Klatzky，Roberta L.;Edward Colgate，J.
我们提出PixeLite，一种新型的触觉设备，产生分布式的横向力的指垫。PixeLite厚度为0.15 mm，重量为1.00 g，由4×4阵列的电粘附制动器（“圆盘”）组成，每个圆盘直径为1.5 mm，间距为2.5 mm。该阵列戴在指尖上，并滑过电接地的相对表面。它可以产生高达500 Hz的可感知激励。当圆盘在150 V、5 Hz下被激活时，相对于相对表面的摩擦变化导致62759 m的位移。位移幅值随频率的增加而减小，在150 Hz时为476 m。然而，手指的刚度导致大量的机械圆盘到圆盘耦合，这限制了阵列产生空间局部化和分布效应的能力。第一个心理物理实验表明，PixeLite的感觉可以定位到总阵列面积的30%左右。然而，第二个实验表明，在棋盘图案中相互异相的相邻冰球并没有产生感知到的相对运动。相反，机械耦合主导运动，导致手指的大部分感觉到单一频率。
We present PixeLite, a novel haptic device that produces distributed lateral forces on the fingerpad. PixeLite is 0.15 mm thick, weighs 1.00 g, and consists of a 4×4 array of electroadhesive brakes (“pucks”) that are each 1.5 mm in diameter and spaced 2.5 mm apart. The array is worn on the fingertip and slid across an electrically grounded countersurface. It can produce perceivable excitation up to 500 Hz. When a puck is activated at 150 V at 5 Hz, friction variation against the countersurface causes displacements of 62759m. The displacement amplitude decreases as frequency increases, and at 150 Hz is 476m. The stiffness of the finger, however, causes a substantial amount of mechanical puck-to-puck coupling, which limits the ability of the array to create spatially localized and distributed effects. A first psychophysical experiment showed that PixeLite's sensations can be localized to an area of about 30% of the total array area. A second experiment, however, showed that exciting neighboring pucks out of phase with one another in a checkerboard pattern did not generate perceived relative motion. Instead, mechanical coupling dominates the motion, resulting in a single frequency felt by the bulk of the finger.