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Related Concept Videos

Tactile and Chemical Senses01:27

Tactile and Chemical Senses

Tactile senses encompass touch, temperature, and pain, each mediated by specific receptors. Touch receptors detect mechanical energy or pressure against the skin. Sensory fibers from these receptors enter the spinal cord and relay information to the brain stem. Here, most fibers cross over to the opposite side of the brain. The touch information then moves to the thalamus, which projects a map of the body's surface onto the somatosensory areas of the parietal lobes in the cerebral cortex. This...

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Soft and Stretchable Optical Fibers with Gradient Color Coding for Multipoint Bending and Tactile Perception in

Xiaopeng Yan1, Xiangyu Yan1, Taihao Zhang1

  • 1Key Laboratory of Bionic Engineering of Ministry of Education, Jilin University, Changchun 130022, China.

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This study presents a new optical fiber sensor for robotic tactile sensing. The flexible, gradient-colored sensor accurately measures bending and pressure, advancing intelligent robotics and human-computer interaction.

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Area of Science:

  • Robotics
  • Materials Science
  • Optical Engineering

Background:

  • Advancements in intelligent humanoid robotics rely heavily on sophisticated tactile sensing technologies.
  • Optical fiber-based tactile sensors are gaining prominence due to their rapid development and unique sensing capabilities.
  • Human skin's tactile mechanoreceptors inspire novel sensor designs with spatial distribution and multipoint sensing.

Purpose of the Study:

  • To develop a stretchable and flexible optical fiber sensor inspired by human tactile mechanoreceptors.
  • To create a multipoint stress and pressure decoupling method using gradient color coding and multiwavelength referencing.
  • To enable precise measurement of bending, joint position, and pressure localization on robotic hands.

Main Methods:

  • Fabrication of a stretchable optical fiber sensor with gradient-colored segments embedded in its core.
  • Utilizing variations in optical loss coefficients of absorbing bands under mechanical stress (bending/pressure).
  • Implementing a multipoint stress and pressure decoupling method with gradient color coding and multiwavelength referencing.

Main Results:

  • Demonstrated that optical loss coefficients change predictably with bending or pressure in gradient-colored fiber segments.
  • Showcased stable performance of non-absorbing bands, allowing for reliable referencing.
  • Successfully integrated the soft fiber optic sensor onto robotic hands for precise tactile measurements.

Conclusions:

  • The proposed optical fiber sensor offers high design flexibility, ease of fabrication, and excellent tensile performance.
  • This technology enables precise measurement of bending angles, finger joint positions, and pressure localization.
  • The sensor is a promising solution for enhancing human-computer interaction and advancing intelligent robotics.