This chapter explores the role of touch in the perception of Shitsukan, referring to material qualities like texture, hardness, and temperature. Haptics plays a critical role in understanding Shitsukan through five key sensations: hardness–softness, friction, micro-level roughness, macro-level roughness, and thermal. In addition, vibrotactile perception is involved in all of these factors except heat. The chapter presents examples on how these haptic sensations can be measured and reproduced. The first example is the presentation of softness using both force and cutaneous feedback. Previous research showed that force feedback alone is insufficient to replicate soft objects, and combining it with cutaneous feedback significantly improves the realism of the sensation. Based on this finding, a method employing an electro-tactile display has been proposed to simulate variations in contact area associated with the deformation of soft objects under pressure. The second example addresses the perception of high-frequency vibrations and introduces a method for reproducing them with high fidelity based on perceptual characteristics. It also introduces a spatial vibration representation that uses multiple oscillators to express the direction and distance of external vibration sources to improve the sense of realism. The third example shows texture rendering through vibrations and friction on touch panels. Vibratory stimuli and friction control create sensations of roughness and texture, offering new possibilities for tactile interfaces. By accurately controlling skin deformation, these methods can simulate a wide range of textures, making haptic feedback increasingly useful in touch-based devices.

错误:搜索内容不能为空,请输入英文关键词
错误:关键词超出字数限制,请精简
高级检索

The Haptics of Shitsukan

  • Hiroyuki Kajimoto,
  • Masashi Konyo,
  • Shogo Okamoto

摘要

This chapter explores the role of touch in the perception of Shitsukan, referring to material qualities like texture, hardness, and temperature. Haptics plays a critical role in understanding Shitsukan through five key sensations: hardness–softness, friction, micro-level roughness, macro-level roughness, and thermal. In addition, vibrotactile perception is involved in all of these factors except heat. The chapter presents examples on how these haptic sensations can be measured and reproduced. The first example is the presentation of softness using both force and cutaneous feedback. Previous research showed that force feedback alone is insufficient to replicate soft objects, and combining it with cutaneous feedback significantly improves the realism of the sensation. Based on this finding, a method employing an electro-tactile display has been proposed to simulate variations in contact area associated with the deformation of soft objects under pressure. The second example addresses the perception of high-frequency vibrations and introduces a method for reproducing them with high fidelity based on perceptual characteristics. It also introduces a spatial vibration representation that uses multiple oscillators to express the direction and distance of external vibration sources to improve the sense of realism. The third example shows texture rendering through vibrations and friction on touch panels. Vibratory stimuli and friction control create sensations of roughness and texture, offering new possibilities for tactile interfaces. By accurately controlling skin deformation, these methods can simulate a wide range of textures, making haptic feedback increasingly useful in touch-based devices.