VR Locomotion System Using Passive Rails and Variable-Friction Foot Coverings
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Solution Overview
Problem
Conventional locomotion devices for virtual reality systems are either complex and expensive or lack natural movement, leading to instability and reduced immersion, making them unsuitable for home use and natural gait simulation.
Innovation Solution
A locomotion system featuring a platform with a safety harness and variable-friction foot coverings that allow users to move naturally while maintaining stability and safety, translating physical movements into virtual environment interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If motorized components with sensors and feedback loops are used to detect and counter user movements, then the user can be brought back to the center of the platform, but the device becomes complex and expensive
Solution Approach 1:
The patent extracts and removes the complex motorized components, sensors, and feedback loops from the locomotion device. Instead of using active motorized systems to detect and counter user movements, the invention relies on passive mechanical elements such as rails and guide structures that naturally constrain movement without requiring electronic control systems.
Solution Approach 2:
The passive rail and guide structures self-regulate user positioning without external control. The mechanical design inherently guides the user back to the center through physical constraints and gravity-assisted mechanisms, eliminating the need for motorized feedback systems.
2Reliability
If the platform size is increased to prevent users from walking off, then user safety is improved, but the device becomes large and bulky
Solution Approach 1:
The patent segments the platform into distinct functional zones with rails and guide structures positioned at the boundaries. These segmented elements create virtual boundaries that guide user movement without requiring a uniformly large platform area, allowing compact design while maintaining safety.
Solution Approach 2:
The invention adds vertical dimension elements such as raised rails and guide structures that constrain horizontal movement. By utilizing the vertical dimension for constraint mechanisms, the platform can remain compact in horizontal area while still preventing users from walking off.
3Ease of operation
If rolling components like ball bearings are used to enable movement, then user mobility is improved, but the device becomes heavy and expensive
Solution Approach 1:
The patent replaces complex rolling mechanical systems like ball bearings with simpler sliding or rolling-contact mechanisms along fixed rails. This substitution maintains user mobility while significantly reducing the weight and complexity of the device by eliminating numerous individual rolling components.
4Reliability
If motorized belts or rollers are used to counter user movements, then user positioning is maintained, but the response latency causes incorrect movements
Solution Approach 1:
The patent removes the motorized belts and rollers that caused response latency issues. By eliminating the electronic detection-motor response loop, the system achieves instantaneous mechanical response to user movements through passive rail constraints that require no processing time.
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
Enables users to experience a natural walking gait and stable movement within a virtual reality environment, improving immersion and accessibility for home use by addressing the limitations of existing devices.
Implementation Method 1
variable-friction foot coverings that allow users to move naturally while maintaining stability and safety
Data Source
AI summary
A locomotion system for use with a virtual environment technology includes a platform configured to support a user, a harness support assembly coupled to the platform and extending upwardly from the platform, and a safety harness configured to be worn by the user. The harness support assembly includes a support halo positioned above the platform and extending about a vertical central axis. The safety harness includes an interface structure moveably coupled to the support halo.