Comparative Experimental Research on Haptic Display Methods of Virtual Surface Shape Based on Touch Screen
Comparative Experimental Research on Haptic Display Methods of Virtual Surface Shape Based on Touch Screen
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DOI：
10.1109/toh.2022.3207928
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发表时间：
2022-10-01
影响因子：
2.9
通讯作者：
Song，Aiguo
中科院分区：
文献类型：
--
作者：
Chen，Dapeng;Chen，Geng;Song，Aiguo
随着触摸屏技术在日常生活中的广泛应用，越来越多的研究尝试以触摸屏为载体向人们传达虚拟物体的表面形状特征。目前的研究已经提出了诸如直接高度映射和基于侧向力的触觉错觉的方法来在触摸屏上显示虚拟表面的几何形状。然而，这些方法在显示形状特征方面的性能是否存在差异，以及基于侧向力的触觉错觉是否可以用于显示复杂表面的形状特征，尚未得到充分探讨。针对这种情况，在本文中，我们进行了用户实验的两个规则形状和八个自然图像下的位移场和两种类型的横向力场的帮助下，以前设计的三个触觉设备。我们还评估了图像平滑对用户感知自然图像形状特征的影响。实验结果表明，目前的形状显示设备和方法，可以模拟横向力场提出的（明斯基等，1990）不能实现位移场对复杂形状的显示效果，且仅采用电阻式侧向力反馈时形状显示效果最差。然而，由于基于横向力场的方法，如电振动，使人们可以直接感知触摸屏上的虚拟表面的形状特征，用裸露的手指，这种形状表示方法的继续研究仍然有一个非常诱人的前景。
With the wide application of touch screen technology in daily life, more and more studies have tried to use touch screen as a carrier to convey the surface shape features of virtual objects to people. Current studies have proposed methods such as direct height mapping and haptic illusion based on lateral force to display the geometric shape of virtual surfaces on the touch screen. However, whether there are differences in the performance of these methods in displaying the shape features, and whether the lateral force-based haptic illusion can be used to display the shape features of complex surfaces, has not been fully explored. Aiming at this situation, in this article, we carry out user experiments on two regular shapes and eight natural images under displacement field and two types of lateral force fields with the help of three haptic devices previously designed. We also evaluate the effect of image smoothing on users' perception of natural image shape features. Experimental results show that the current shape display devices and methods that can simulate the lateral force field proposed by (Minsky et al., 1990) cannot achieve the display effect of the displacement field on complex shapes, and the shape display effect is the worst when only resistive lateral force feedback is employed. Nevertheless, since methods based on lateral force field, such as electrovibration, allow people to directly perceive the shape features of the virtual surface on the touch screen with their bare fingers, continuous research on this shape expression method still has a very attractive prospect.