Multi-Headset AR Positioning Using a Primary Tracking Device
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Solution Overview
Problem
Existing AR technologies for construction sites are costly and complex, and fail to efficiently provide accurate AR imagery to multiple users, leading to discrepancies and errors in construction projects.
Innovation Solution
A primary positioning device with high-accuracy sensors tracks multiple auxiliary AR headsets, allowing them to determine their position and orientation relative to the primary device, reducing the need for sensors in the auxiliary headsets and lowering computational demands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple auxiliary AR headsets are equipped with high-accuracy positional tracking sensors, then each user can independently and accurately locate AR information, but the cost and device complexity increase significantly
Solution Approach 1:
The patent combines multiple tracking functions into a single primary positioning device. This central device performs pose estimation for multiple auxiliary headsets simultaneously, eliminating the need for each auxiliary headset to have its own high-accuracy sensors. The primary device acts as a hub that consolidates the positioning functionality, reducing overall system complexity while maintaining positioning accuracy through centralized computation.
Solution Approach 2:
The primary positioning device serves as an intermediary between the construction site environment and the auxiliary AR headsets. It receives sensor data from auxiliary devices, performs the computationally intensive pose estimation, and provides positioning information back to the headsets. This intermediary approach allows auxiliary headsets to use simpler, lower-cost sensors while still achieving accurate positioning through the primary device's processing.
2Reliability
If each auxiliary AR headset is equipped with full positional tracking sensors, then independent tracking is achieved, but computational demands and resource utilization increase
Solution Approach 1:
The patent segments the computational workload by separating pose estimation functions from the auxiliary headsets and concentrating them in the primary positioning device. The auxiliary headsets only need to capture sensor data and transmit it to the primary device, which performs the heavy computational task of pose estimation. This segmentation reduces the computational burden on each auxiliary headset, lowering their energy consumption and resource requirements while maintaining tracking reliability through centralized processing.
3Measurement precision
If a common high-accuracy positional tracking system is used for all users, then accurate AR display is achieved, but the cost of the system increases
Solution Approach 1:
The primary positioning device is designed as a universal platform that can track multiple auxiliary headsets simultaneously using a single set of high-accuracy sensors. Instead of requiring separate high-accuracy tracking systems for each user, the primary device serves all auxiliary headsets universally. This multi-functionality reduces the total number of expensive high-accuracy sensors needed, lowering system cost while maintaining AR display accuracy for all users through centralized pose estimation.
Data Source
AI summary
Methods and systems for displaying augmented reality (AR) information at a construction site are described. These involve pro-viding a primary positioning device and at least one auxiliary AR headset at the construction site. The primary positioning device is tracked within the construction site using a positional tracking system and the at least one auxiliary AR headset is tracked relative to the primary positioning device. A relative pose of said auxiliary AR headset and a measured pose of the primary positioning device are used to determine a measured pose of said auxiliary AR headset within a coordinate system representing the construction site. The measured pose of at least the at least one auxiliary AR headset is used to display AR information via said auxiliary AR head-set.