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<p>This study presents an innovative approach to developing capacitive touch and proximity sensors by utilizing a pencil to draw interdigitated capacitors (IDCs) on non-conductive construction materials such as cement, cement fiberboard, stone, and brick. Moving beyond flexible substrates like paper, this work focuses on rigid materials, achieving a linear resistance of approximately 22 Ω/cm on cement. The sensors demonstrate high responsiveness making them suitable for real-time Human-Building Interaction (HBI) applications. Additionally, the sensor exhibits a sensitivity of about 0.04 pF/cm in proximity sensing, highlighting its effectiveness in multi-sensory applications. This low-cost, eco-friendly fabrication method has significant potential to transform HBI use cases by offering a practical, durable solution for constructing touch-sensitive walls and other interactive surfaces.</p>

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Hand drawn capacitive proximity/touch sensors

  • 期刊论文

  • 发表日期：

    2025年4月15日

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  • Vinit Srivatava,
  • Abhay Singh Thakur,
  • Rahul Vaish,
  • Bharat Singh Rajpurohit,
  • Nasser S. Awwad,
  • Hala A. Ibrahium,
  • Imen kebaili,
  • Imed Boukhris

摘要

This study presents an innovative approach to developing capacitive touch and proximity sensors by utilizing a pencil to draw interdigitated capacitors (IDCs) on non-conductive construction materials such as cement, cement fiberboard, stone, and brick. Moving beyond flexible substrates like paper, this work focuses on rigid materials, achieving a linear resistance of approximately 22 Ω/cm on cement. The sensors demonstrate high responsiveness making them suitable for real-time Human-Building Interaction (HBI) applications. Additionally, the sensor exhibits a sensitivity of about 0.04 pF/cm in proximity sensing, highlighting its effectiveness in multi-sensory applications. This low-cost, eco-friendly fabrication method has significant potential to transform HBI use cases by offering a practical, durable solution for constructing touch-sensitive walls and other interactive surfaces.