Distribution Characteristics and Correlation of Edge Sharpness Threshold and Contact Area

IF 2.4 3区计算机科学 Q2 COMPUTER SCIENCE, CYBERNETICS

IEEE Transactions on Haptics Pub Date : 2024-01-25 DOI:10.1109/TOH.2024.3357751

Qian Wu;Jianguang Li

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引用次数: 0

Abstract

It is currently unclear how sharpness discrimination ability is distributed across a wide range of edge sharpness and the effect of contact area on haptic perception. We 3D printed triangular prisms with various edge sharpness and half-edge widths in the full-scale range and conducted 2AFC tasks to gain the haptic threshold distribution. Results show that the distribution curves of the sharpness threshold and its contact area have a similar inflection point at 115

$^\circ$

, implying a boundary between medium-low and high stimuli. It is also found that Weber fractions in the medium stimulus range follow Weber's Law and are consistent with previous studies but lower than the mean of Weber fractions in the high stimulus range. Besides, there is no significant difference in upper and lower thresholds in the medium-low stimulus range but a significant difference in the high stimulus range with the higher upper threshold. Variations in contact area do not affect sharpness discrimination ability when the half-edge width exceeds 2 mm. However, decreasing the half-edge width from 2 mm to 1 mm significantly reduces haptic sensitivity. Our findings offer preliminary evidence contributing to understanding haptic perception in edge sharpness discrimination, encompassing the properties of objects and object-individual interfaces.

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边缘锐度阈值和接触面积的分布特征及相关性。

目前还不清楚边缘锐度分辨能力在不同边缘锐度范围内的分布情况以及接触面积对触觉感知的影响。我们在全尺寸范围内三维打印了具有不同边缘锐度和半边宽度的三角棱镜，并进行了 2AFC 任务以获得触觉阈值分布。结果表明，锐度阈值及其接触面积的分布曲线在 115° 处有一个相似的拐点，这意味着中低刺激和高刺激之间存在一个界限。研究还发现，中等刺激范围内的韦伯分数遵循韦伯定律，与之前的研究一致，但低于高刺激范围内韦伯分数的平均值。此外，在中低刺激范围内，上阈值和下阈值没有显著差异，但在高刺激范围内有显著差异，上阈值较高。当半边宽度超过 2 毫米时，接触面积的变化不会影响锐度分辨能力。然而，将半边宽度从 2 毫米减小到 1 毫米会显著降低触觉灵敏度。我们的研究结果提供了初步证据，有助于理解边缘锐利度辨别中的触觉感知，包括物体和物体-个体界面的属性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Haptics COMPUTER SCIENCE, CYBERNETICS-

CiteScore

5.90

自引率

13.80%

发文量

109

审稿时长

>12 weeks

期刊介绍： IEEE Transactions on Haptics (ToH) is a scholarly archival journal that addresses the science, technology, and applications associated with information acquisition and object manipulation through touch. Haptic interactions relevant to this journal include all aspects of manual exploration and manipulation of objects by humans, machines and interactions between the two, performed in real, virtual, teleoperated or networked environments. Research areas of relevance to this publication include, but are not limited to, the following topics: Human haptic and multi-sensory perception and action, Aspects of motor control that explicitly pertain to human haptics, Haptic interactions via passive or active tools and machines, Devices that sense, enable, or create haptic interactions locally or at a distance, Haptic rendering and its association with graphic and auditory rendering in virtual reality, Algorithms, controls, and dynamics of haptic devices, users, and interactions between the two, Human-machine performance and safety with haptic feedback, Haptics in the context of human-computer interactions, Systems and networks using haptic devices and interactions, including multi-modal feedback, Application of the above, for example in areas such as education, rehabilitation, medicine, computer-aided design, skills training, computer games, driver controls, simulation, and visualization.