Adaptive VR Headset Handle Tracking with Optical and Electromagnetic Fusion
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Solution Overview
Problem
Existing VR 6DOF designs face limitations such as optical FOV limitations, external reflection, shielding, and magnetic field interference, leading to poor anti-interference ability and low accuracy in tracking.
Innovation Solution
An adaptive intelligent head-hand VR system that combines optical and electromagnetic tracking, using a headset and handle with cameras, a control end database, and an electromagnetic module to select the appropriate tracking mode based on accuracy and environmental conditions, ensuring high-precision tracking within optical range and 360-degree tracking outside the optical range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical tracking is used for handle tracking, then tracking precision is improved within optical range, but Field of View limitations and external reflection/shielding interference occur
Solution Approach 1:
The patent combines optical tracking and electromagnetic tracking into a unified system. The optical tracking module provides high-precision tracking within its field of view, while the electromagnetic tracking module provides tracking capability outside the optical field of view. The system merges these two tracking methods to achieve both high precision and full 360-degree coverage without interference limitations.
Solution Approach 2:
The patent introduces a switching module as an intermediary that automatically selects between optical tracking and electromagnetic tracking based on environmental conditions and field of view availability. This mediator ensures that the system always uses the most appropriate tracking method, maintaining high precision while avoiding optical limitations through intelligent mode switching.
2Adaptability or versatility
If electromagnetic tracking is used for handle tracking, then 360-degree tracking coverage is achieved, but external magnetic field interference reduces tracking accuracy
Solution Approach 1:
The system merges electromagnetic tracking with optical tracking, where electromagnetic tracking provides comprehensive 360-degree coverage and optical tracking provides high-precision correction within its field of view. This combination allows the system to maintain broad coverage while improving accuracy by using optical data to compensate for electromagnetic interference errors when available.
Solution Approach 2:
The system implements feedback through the switching module that continuously monitors tracking conditions and adjusts the tracking mode accordingly. When optical tracking is available and accurate, it provides feedback to correct electromagnetic tracking data, thereby maintaining high precision while preserving the 360-degree coverage capability of electromagnetic tracking.
3Device complexity
If a single tracking mode is used, then device complexity is reduced, but anti-interference ability and tracking accuracy deteriorate in varying environmental conditions
Solution Approach 1:
The tracking system is designed with multi-functionality, incorporating both optical tracking and electromagnetic tracking capabilities in a single unified device. This universal system can automatically adapt to different environmental conditions by switching between tracking modes, thereby maintaining high reliability and anti-interference ability without significantly increasing operational complexity through intelligent mode selection.
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 enhances anti-interference and environmental adaptability, improving tracking accuracy and user immersion by automatically switching between optical and electromagnetic tracking modes to overcome limitations and interference issues.
Implementation Method 1
the electromagnetic transmitting module is configured to transmit an electromagnetic signal, and the electromagnetic receiving module is configured to receive the electromagnetic signal transmitted by the electromagnetic transmitting module
Implementation Method 2
A headset camera is arranged on the headset, and the headset camera is configured to acquire an external environment image in a headset coordinate system
Implementation Method 3
A handle camera is arranged on the handle, and the handle camera is configured to acquire an external environment image in a handle coordinate system
Data Source
AI summary
An adaptive VR system is provided, which includes a headset and a handle, the headset comprises a headset camera, a control end, and an electromagnetic receiving module, and the control end comprises a control end database and a data selection module; the handle comprises a handle camera and an electromagnetic transmitting module; the headset camera is configured to acquire an external environment image in a headset coordinate system; the handle camera is configured to acquire an external environment image in a handle coordinate system; the control end database is configured to store the external environment image of the handle coordinate system; the data selection module is configured to determine a tracking mode used for tracking the handle, the tracking mode comprising optical tracking; and the electromagnetic receiving module is connected to the data selection module.