Skin Stretch Sensor Mechanism for VR Haptic Feedback
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Solution Overview
Problem
Conventional VR/AR systems lack effective feedback mechanisms that simulate the tactile experience of interacting with real objects, making virtual interactions feel less immersive and realistic.
Innovation Solution
A skin stretch sensor system that records and replicates skin stretch information during interactions with real objects, using mechanical actuators and gears to simulate the forces experienced when interacting with virtual objects, enhancing haptic feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional VR gloves are used to provide limited interaction with virtual objects, then basic input functionality is achieved, but tactile feedback and immersion are insufficient
Solution Approach 1:
The patent implements a feedback mechanism that measures actual skin stretch during interaction with real objects and uses this data to drive actuators that replicate the same skin stretch pattern during virtual object interaction. This closed-loop feedback approach enhances immersion by making virtual interactions feel physically realistic without requiring overly complex mechanical structures.
Solution Approach 2:
The system copies the skin stretch characteristics from real object interactions and reproduces them during virtual interactions. By measuring and replicating the actual physical deformation of skin, the system creates authentic tactile feedback that mimics real-world sensations, improving immersion without adding mechanical complexity.
2Manufacturing precision
If skin stretch mechanisms with gears and rollers are implemented to simulate real object interaction, then tactile feedback realism is improved, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical tactile feedback systems with a measurement-and-replication approach. Instead of using intricate mechanical linkages to simulate skin stretch, the system uses sensors to measure actual skin deformation and actuators to reproduce it, achieving high tactile accuracy with simpler overall system architecture.
Solution Approach 2:
The system introduces skin stretch sensors and controllers as intermediary elements between the user's finger and the virtual object interaction. These intermediaries measure and replicate skin deformation, providing accurate tactile feedback without requiring direct complex mechanical coupling between the finger and actuation system.
3Reliability
If mechanical actuators are used to stretch skin during virtual object interaction, then haptic feedback is enhanced, but energy consumption increases
Solution Approach 1:
The system performs preliminary measurement of skin stretch characteristics during calibration with real objects before virtual interaction begins. This pre-characterization allows the actuators to efficiently replicate only the necessary skin deformation patterns during virtual interactions, reducing energy consumption while maintaining high haptic feedback quality.
Solution Approach 2:
The system changes the operational parameters of the actuators based on the specific virtual object being interacted with. By adjusting actuation force, speed, and pattern to match the calibrated skin stretch characteristics of different objects, the system optimizes energy consumption while maintaining realistic haptic feedback across various virtual interactions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system significantly improves the immersion of virtual interactions by providing realistic tactile feedback, allowing users to feel the weight and texture of virtual objects as if they were real, thereby enhancing the overall VR/AR experience.
Implementation Method 1
The first bearing is configured to rotate in a first direction in response to an interaction with a surface
Implementation Method 2
The second bearing is coupled to the first bearing, such that rotation of the first bearing causes the second bearing to rotate in a direction opposite to the first direction
Data Source
AI summary
A sensor records information about skin stretch perceived by a user based on an interaction with a real object. The sensor includes a mechanical housing configured to be worn on a finger of a user, and a mechanism coupled to the mechanical housing. The mechanism includes a first bearing that rotates in a first direction in response to an interaction with a surface. The mechanism also includes a second bearing coupled to the first bearing, such that rotation of the first bearing causes the second bearing to rotate in a direction opposite to the first direction. The second bearing is in contact with a portion of the finger, and includes a feedback surface that simulates a force associated with the interaction with the surface. The sensor includes a controller configured to monitor rotation of the second bearing and record skin stretch information responsive to the interaction with the surface.