AR Object Positioning via Wireless Signal Multilateration
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Solution Overview
Problem
Existing augmented reality technologies face limitations in accurately determining the position of objects, especially in indoor spaces, due to labor-intensive characteristics and computing requirements, and lack pre-installation or spatial learning, which affects their accuracy and usability in real-world mobile terminal applications.
Innovation Solution
A device and method that utilize a sensing unit with a camera and inertial measurement unit for Visual Inertial Odometry to measure the mobile terminal's position, combined with a communication unit to measure communication distance using signal intensity or time of flight, and a calculation unit employing multilateration to estimate the object's position, enabling accurate object location measurement without pre-installed data or spatial learning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If vision-based marker method or camera vision-based methods are used to identify object location, then augmented reality can be implemented, but measurement precision and accuracy are insufficient
Solution Approach 1:
The patent replaces complex vision-based computational methods with a simpler wireless communication-based measurement system. Instead of using camera vision processing and image analysis, the system uses wireless signal transmission and reception with time of flight calculation to determine distances, thereby substituting a computationally intensive optical-mechanical system with a more straightforward electromagnetic signal-based system that achieves higher measurement precision.
Solution Approach 2:
The patent introduces wireless communication signals as an intermediary medium to measure distances between the mobile terminal and objects. By using signal transmission and reception with time of flight calculation, the system creates an indirect measurement path that avoids the complexity of direct vision-based methods while achieving superior accuracy in locating objects for augmented reality display.
2Measurement precision
If pre-installation or spatial learning is performed to improve positioning accuracy, then object location can be determined more accurately, but loss of time and ease of operation deteriorate
Solution Approach 1:
The patent enables the system to automatically perform real-time distance measurements and object location calculations without requiring pre-installation of object position data or spatial learning processes. The mobile terminal autonomously measures distances to objects using wireless communication signals and automatically calculates three-dimensional positions, thereby eliminating the need for time-consuming preparatory steps while maintaining high positioning accuracy.
Solution Approach 2:
The patent performs distance measurements and position calculations in real-time as preliminary actions before displaying augmented reality content. By continuously measuring distances to multiple objects and calculating their three-dimensional positions on-the-fly, the system prepares the necessary spatial information in advance of the actual AR display, eliminating the need for separate pre-installation phases.
3Measurement precision
If multiple distance measurements are taken while moving to calculate object position, then measurement precision improves, but loss of time increases
Solution Approach 1:
The patent employs periodic distance measurements taken at regular intervals as the mobile terminal moves through the space. By systematically measuring distances to objects at multiple predetermined positions and using these periodic measurements to calculate three-dimensional object locations, the system achieves high measurement precision while maintaining efficient processing through regular, rhythmic measurement cycles.
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 provides accurate object positioning for augmented reality services, enabling intuitive and efficient user interactions and applications such as indoor navigation and disaster response, even without prior object position entry or spatial learning, with enhanced accuracy and usability.
Implementation Method 1
the sensing unit includes a camera and an inertial measurement unit, and measures the current position of the mobile terminal through Visual Inertial Odometry (VIO)
Implementation Method 2
the communication unit measures the communication distance by using an intensity of a receiving signal received from the object
Implementation Method 3
the communication unit measures the communication distance by using an intensity of a receiving signal received from the object or a time of flight between the mobile terminal and the object
Data Source
AI summary
The present invention provides an augmented reality service providing device, including: a sensing unit to photograph an object and to measure a current position of a mobile terminal; a communication unit to measure a communication distance between the mobile terminal and the object; a control unit to control to repeat a plurality of times the measurement of the current position and the communication distance while the mobile terminal is moving; a calculation unit to calculate an estimated position of the object based on the current position and the communication distance measured repeatedly a plurality of times; and a display unit to display virtual information on the object on the estimated position of the object.