VR Tracking System with Dynamic Optical and Electromagnetic Module Selection
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Solution Overview
Problem
Existing VR systems face limitations in field of view (FOV) with optical tracking, experience interference issues with ultrasonic and electromagnetic tracking, such as FOV limitations, external reflections, and magnetic field interference, leading to poor anti-interference ability and low accuracy.
Innovation Solution
A high-precision anti-interference VR system that dynamically selects between optical and electromagnetic tracking modules based on the FOV range, using an optical display module and electromagnetic emission module to emit and receive signals, combined with IMU sensors and a wireless transmission module to enhance tracking accuracy and adaptability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If optical tracking is used, then tracking precision is improved within FOV, but field of view coverage is limited
Solution Approach 1:
The tracking system is segmented into multiple independent tracking modules: optical tracking modules for high-precision tracking within FOV, and electromagnetic tracking modules for tracking outside FOV. The system divides the tracking space into different zones and assigns different tracking methods to each zone, allowing both high precision within FOV and wide coverage outside FOV.
Solution Approach 2:
The VR headset is equipped with multiple types of tracking modules (optical and electromagnetic) that can serve different tracking needs. The system can universally handle both within-FOV and outside-FOV tracking scenarios by selecting the appropriate module, making the tracking system adaptable to various field of view requirements.
2Area of moving object
If electromagnetic tracking is used, then field of view coverage is improved for 360-degree tracking, but anti-interference ability deteriorates due to magnetic field interference
Solution Approach 1:
The system introduces a data selection module as an intermediary that intelligently selects between optical and electromagnetic tracking modules based on the current tracking scenario. This mediator prevents electromagnetic interference issues by choosing optical tracking when available and appropriate, while still enabling 360-degree coverage through electromagnetic tracking when needed.
Solution Approach 2:
The system changes the tracking mode parameter dynamically based on the tracking object's position and environmental conditions. By switching between optical and electromagnetic tracking modes, the system optimizes both field of view coverage and anti-interference ability for different operational scenarios.
3Area of moving object
If ultrasonic tracking is used, then field of view coverage is improved, but measurement precision deteriorates due to external reflection and block
Solution Approach 1:
The system merges multiple tracking technologies (optical, electromagnetic, and ultrasonic) into a unified tracking framework. By combining the advantages of different tracking methods, the system achieves both wide field of view coverage and high tracking accuracy, compensating for the weaknesses of individual technologies.
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 achieves high-precision, low-latency optical tracking within the optical FOV range and supports 360-degree tracking outside this range, significantly improving anti-interference and environmental adaptability of VR products.
Implementation Method 1
the optical display module is configured to emit a physical signal by adjusting on-off and brightness thereof
Implementation Method 2
the electromagnetic emission module is configured to: generate an electromagnetic signal through a driving circuit and transmit the electromagnetic signal
Implementation Method 3
the electromagnetic receiving module is configured to receive the electromagnetic signal to complete electromagnetic tracking
Implementation Method 4
the IMU sensor module includes at least a gravity acceleration sensor and a gyroscope
Implementation Method 5
the IMU sensor module includes at least a gravity acceleration sensor and a gyroscope
Data Source
AI summary
Provided is a high-precision anti-interference VR system, including a data selection module, a headset, and a handle matched with the headset, the data selection module selects and invokes an optical tracking module group and an electromagnetic tracking module group according to an optical FOV range; the optical tracking module group includes an optical display module and an optical tracking module, the optical display module emits a physical signal by adjusting on-off and brightness thereof; the optical tracking module obtains the physical signal emitted by the optical display module, and converts the physical signal into tracking information of the handle; the electromagnetic tracking module group includes an electromagnetic emission module and an electromagnetic receiving module, the electromagnetic emission module generates an electromagnetic signal through a driving circuit, and transmits the electromagnetic signal; and the electromagnetic receiving module receives the electromagnetic signal to complete electromagnetic tracking.