In-Vehicle AR Positioning Using Anchors to Separate Motion
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Solution Overview
Problem
Wearable augmented reality (AR) devices struggle to differentiate between the movement of a vehicle and the movement of a user inside, leading to inaccurate AR content output.
Innovation Solution
The AR device determines its position and direction within a vehicle by using sensors and anchor devices, allowing it to provide AR content independently of the vehicle's movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the IMU of the wearable AR device is used to track user movement, then the device can detect movement data, but the IMU cannot differentiate between vehicle movement and user movement inside the vehicle
Solution Approach 1:
The patent introduces an intermediary system consisting of anchor devices installed in the vehicle and a positioning server that mediates between the wearable AR device and the vehicle's movement. The anchor devices transmit positioning information to the server, which then provides corrected position data to the AR device, enabling the system to distinguish between vehicle movement and user movement indirectly through this intermediary positioning infrastructure.
Solution Approach 2:
The patent replaces the purely mechanical IMU-based movement detection system with a hybrid system that incorporates wireless communication and server-based processing. Instead of relying solely on the IMU to detect movement, the system uses anchor devices with communication modules to transmit positioning data through a network to a positioning server, which then provides corrected position information, substituting the direct mechanical sensing approach with a communication and computation-based approach.
2Device complexity
If the wearable AR device outputs AR content based on IMU data alone, then the device structure remains simple, but the AR content moves incorrectly when the vehicle moves
Solution Approach 1:
The patent segments the AR content output function into separate components: the wearable AR device collects IMU data and anchor positioning data, transmits this information to a positioning server, and receives corrected position data back. The positioning server independently processes the movement compensation logic. This segmentation allows the AR device to maintain relative simplicity while delegating the complex movement differentiation and AR content positioning to the external server system.
3Measurement precision
If the system uses anchor devices and communication with the vehicle, then the AR content positioning accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent applies multi-functionality to the anchor devices, which serve multiple purposes: they act as positioning references for the AR device, communicate with the positioning server to provide vehicle movement information, and enable the system to determine both position and direction accurately. By making the anchor devices multi-functional, the system achieves improved measurement precision without proportionally increasing device complexity, as the anchor devices perform multiple functions within a single component.
Data Source
AI summary
A method of providing an augmented reality (AR) content in a vehicle, and/or a wearable AR device and an electronic device for performing a method. The wearable AR device may include a processor and a memory storing instructions. The processor, when executing the instructions, causes the wearable AR device to: set reference points corresponding to positions of anchor devices on first spatial map data corresponding to a space of a vehicle, determine a position and a direction of the wearable AR device on the first spatial map data based on the reference points and a positional relationship between the wearable AR device and anchor devices, and control output AR content based on the determined position and the determined direction of the wearable AR device.