Role of indentation depth and contact area on human perception of softness for haptic interfaces
Role of indentation depth and contact area on human perception of softness for haptic interfaces
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DOI：
10.1126/sciadv.aaw8845
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发表时间：
2019-08-01
期刊：
影响因子：
13.6
通讯作者：
Lipomi, Darren J.
中科院分区：
文献类型：
--
作者：
Dhong, Charles;Miller, Rachel;Lipomi, Darren J.
在工程中，用压痕器测量物体的“柔软度”表现为两个可测量的参数：(i)压痕深度和（ii）接触面积。对于人类来说，柔软度并没有很好的定义，尽管人们认为感知取决于同样的两个参数。然而，解耦它们的相对贡献并不是直截了当的，因为大多数散装的“现成的”材料在压痕深度和接触面积之间表现出相同的比例。在这里，我们通过制造具有精确厚度和微结构表面的弹性体板来解耦压痕深度和接触面积。采用双选项强迫选择和幅度估计测试的人体实验表明，压痕深度和接触面积对感知柔软度有独立的影响。我们发现物体的柔软度与其几何属性之间存在明确的关系。使用这种方法，可以为人类交互设计具有所需感知柔软程度的对象。
In engineering, the "softness" of an object, as measured by an indenter, manifests as two measurable parameters: (i) indentation depth and (ii) contact area. For humans, softness is not well defined, although it is believed that perception depends on the same two parameters. Decoupling their relative contributions, however, has not been straightforward because most bulk-"off-the-shelf"-materials exhibit the same ratio between the indentation depth and contact area. Here, we decoupled indentation depth and contact area by fabricating elastomeric slabs with precise thicknesses and microstructured surfaces. Human subject experiments using two-alternative forced-choice and magnitude estimation tests showed that the indentation depth and contact area contributed independently to perceived softness. We found an explicit relationship between the perceived softness of an object and its geometric properties. Using this approach, it is possible to design objects for human interaction with a desired level of perceived softness.