Aligning Controller Coordinates with Binocular System Using Single Light Spot
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Solution Overview
Problem
Current virtual reality (VR), augmented reality (AR), and mixed reality (MR) systems require complex and costly installations of multiple light spots for coordinate alignment, which are difficult to calibrate and mass-produce, leading to high complexity and long assembly times.
Innovation Solution
A method and device for aligning a controller or headset with a binocular system using a single light spot, where pose data and real-time coordinate data are used to generate a motion track, determine the pose of the controller or headset, and correct the binocular coordinate system to align the positive direction with the virtual environment coordinate system, reducing complexity and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple light spots are adopted for coordinate alignment, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent divides the coordinate alignment task into two independent stages: first aligning the binocular system using a simple single light spot, then aligning the controller separately using its own light spot and IMU data. This segmentation allows each component to be aligned independently with simpler hardware, reducing overall system complexity while maintaining precision.
Solution Approach 2:
The patent introduces motion track as an intermediary element that connects the light spot position data with the controller pose data. By using the motion track generated from IMU-accelerated movement as a mediator, the system can align coordinates without requiring complex direct multi-spot geometric relationships, simplifying the alignment mechanism.
2Measurement precision
If multiple light spots are deployed in all directions, then measurement precision is improved, but ease of manufacture deteriorates
Solution Approach 1:
The patent segments the alignment process into independent stages for the binocular system and the controller, each using a single light spot. This eliminates the need for complex multi-directional light spot arrangements, making the devices much easier to manufacture and assemble while maintaining sufficient precision through the two-stage alignment approach.
Solution Approach 2:
The patent performs preliminary alignment of the binocular system using a single light spot before controller alignment. This preliminary action establishes a stable reference coordinate system, allowing subsequent controller alignment to proceed independently with simpler requirements, thereby easing manufacturing and assembly.
3Measurement precision
If complex calibration is performed for multi-light spot alignment, then measurement precision is improved, but loss of time increases
Solution Approach 1:
The patent divides the calibration process into two separate, simplified calibration stages instead of one complex multi-spot calibration. Each stage uses a single light spot and requires minimal calibration steps, dramatically reducing the time required while maintaining precision through the cumulative effect of both stages.
Solution Approach 2:
The patent performs preliminary binocular system calibration using a single light spot before controller calibration. This preliminary calibration establishes the reference frame quickly, allowing the subsequent controller calibration to proceed independently and rapidly without requiring re-calibration of the entire system, thus reducing total calibration time.
4Measurement precision
If multiple light transmitters or receivers are installed on headset, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent segments the tracking function between the binocular system and the headset, with each using a single light spot. This segmentation allows the headset to maintain simple configuration with minimal components while achieving accurate tracking through its integration with the binocular system's coordinate alignment, eliminating the need for multiple light transmitters or receivers on the headset.
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 solution simplifies the alignment process, reduces costs, and enables efficient alignment of the controller or headset with the virtual environment coordinate system, achieving precise alignment with a single light spot and lower production complexity.
Implementation Method 1
acquiring real-time coordinate data of the controller in a binocular coordinate system during a repeating movement based on a light spot emitted from the controller
Implementation Method 2
the coordinate of an IMU (Inertial Measurement Unit, which is used for measuring the three-axis pose angle or angular rate of an object, wherein the IMU module includes a gyroscope, an accelerometer and a magnetometer)
Data Source
AI summary
The present disclosure provides a method and a device for aligning a coordinate of a controller or a headset with a coordinate of a binocular system. The method includes: obtaining pose data of the controller; acquiring real-time coordinate data in a binocular coordinate system during a repeating movement of the controller based on a light spot emitted from the controller; generating a motion track of the controller during the movement based on the real-time coordinate data and the pose data; obtaining a pose of the controller in controller coordinate system based on the motion track; obtaining a first angle between the positive direction of the controller coordinate system and a positive direction of the binocular coordinate system; and correcting the binocular coordinate system based on the first angle until the angle reaches zero. The method and device for aligning coordinates is easy to be implemented with low cost.