Magnetometer Calibration via Gameplay Motion in AR Devices
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Solution Overview
Problem
Calibration of magnetometers in augmented reality (AR) and virtual reality (VR) systems is often distracting for users and requires extensive movements, which can be burdensome and time-consuming, and existing methods may not adequately account for varying magnetic biases in different environments.
Innovation Solution
A method that integrates magnetometer calibration into gameplay motions, such as the Kendo Kata pattern, allowing for dynamic threshold determination based on comparison with a standard model, reducing the need for extensive calibration movements and improving user experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional magnetometer calibration methods are used, then measurement precision is improved, but user experience deteriorates due to extensive movements required
Solution Approach 1:
The patent combines magnetometer calibration with gameplay motions by merging the calibration process with virtual object manipulation activities. The system integrates calibration measurements into existing gameplay interactions, allowing users to perform calibration tasks while engaging with the game content, thus eliminating the need for separate extensive calibration movements.
Solution Approach 2:
The patent makes the gameplay motions serve dual purposes: both for game interaction and for magnetometer calibration. The same physical movements used to manipulate virtual objects in the game are also utilized to collect calibration data, making the calibration process universal and applicable during normal gameplay without requiring additional dedicated calibration actions.
2Measurement precision
If traditional magnetometer calibration methods are used, then measurement precision is improved, but time consumption increases
Solution Approach 1:
The patent enables continuous calibration data collection during gameplay by continuously monitoring magnetic field measurements while the user interacts with virtual objects. Instead of requiring discrete calibration sessions, the system accumulates calibration data continuously during normal game interactions, significantly reducing the time required for calibration while maintaining measurement precision.
Solution Approach 2:
The patent performs preliminary calibration measurements during initial gameplay interactions before full gameplay begins. By collecting and analyzing magnetic field data during early virtual object manipulation actions, the system establishes baseline calibration parameters that can be refined throughout gameplay, reducing the overall calibration time required.
3Measurement precision
If standard calibration movements are required, then magnetic bias detection is improved, but device complexity increases
Solution Approach 1:
The patent implements self-service calibration where the system automatically performs calibration measurements and calculations without requiring user intervention or knowledge of calibration procedures. The magnetometer automatically collects data during virtual object manipulation, the system analyzes the measurements to detect magnetic bias, and applies corrections automatically, eliminating complex manual calibration steps.
Solution Approach 2:
The patent replaces complex mechanical calibration procedures with software-based virtual object manipulation. Instead of requiring precise physical movements through calibrated motion ranges, the system uses virtual reality interactions to induce the necessary magnetometer measurements, substituting mechanical calibration complexity with software-controlled virtual actions that are more intuitive and easier to perform.
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
This approach allows for efficient and effective calibration of magnetometers within the gameplay experience, ensuring accurate magnetic field measurements while minimizing user distraction and adjusting to individual environmental conditions.
Implementation Method 1
receive a first plurality of measurements from the magnetometer relating to a magnetic field in a physical gameplay environment
Data Source
AI summary
Systems, methods and articles of manufacture relating to calibration of a magnetometer in an electronic device suitable for use in an augmented reality (AR) and/or virtual reality (VR) video game. An electronic video game device includes a magnetometer. A prompt is displayed in the video game requesting a user-performed first gameplay motion using the electronic video game device where the first gameplay motion is a pre-defined motion used for calibrating the magnetometer. A first plurality of measurements is received from the magnetometer relating to a magnetic field in a physical gameplay environment, where the first plurality of measurements is taken by the magnetometer during the first gameplay motion. The first plurality of measurements is analyzed to detect a magnetic bias in the magnetometer. The magnetometer is calibrated to offset the magnetic bias.