Design of a Wearable Fingertip Haptic Device for Remote Palpation: Characterisation and Interface with a Virtual...

Area of Science:

• Robotics and Human-Computer Interaction
• Wearable Technology
• Haptics and Virtual Reality

Background:

• Teleoperation and virtual reality demand realistic sensory feedback for user immersion.
• Existing haptic devices often lack nuanced control over perceived stiffness.
• Wearable fingertip devices offer a direct interface for cutaneous feedback.

Purpose of the Study:

• To develop and evaluate a wearable Fingertip Haptic Device (FHD) capable of rendering variable stiffness.
• To assess the FHD's ability to enhance user perception of material properties in virtual environments.
• To validate the FHD's performance through user studies and virtual reality task completion.

Main Methods:

• Development of a wearable FHD incorporating an inertial measurement unit and a Variable Compliance Platform (VCP).
• Characterization of FHD stiffness through pressure and linear displacement parameters of the VCP.
• User studies involving virtual environment tasks to evaluate perceived stiffness and task performance with and without FHD variable compliance.

Main Results:

• The FHD successfully emulates variable object/surface stiffness properties through controlled pressure and displacement.
• User studies demonstrated improved performance in virtual tasks, particularly in distinguishing between objects of different hardness.
• Variable compliance provided by the FHD significantly enhanced user perception and interaction realism.

Conclusions:

• The developed wearable Fingertip Haptic Device (FHD) effectively renders variable stiffness, enhancing haptic perception.
• The FHD shows significant potential for improving user performance and immersion in teleoperation and virtual reality applications.
• The Variable Compliance Platform (VCP) is crucial for achieving realistic stiffness emulation and user interaction.