Head-Mounted AR Display Mode Switching for Fault Tolerance
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Solution Overview
Problem
Existing head-mounted displays (HMDs) used for augmented reality (AR) image display face challenges in continuing normal operation when camera or sensor abnormalities occur, leading to interruptions in maintenance and inspection work.
Innovation Solution
The HMD incorporates a camera abnormality detector, sensor abnormality detector, battery, image generator, display, and mode switcher to switch between advanced and simple processing modes, ensuring AR image display continuity even with abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the camera and sensor group operate normally to create high-accuracy AR images, then the AR image display quality is improved, but the system stops displaying when abnormality occurs in these components
Solution Approach 1:
The system dynamically switches between two processing modes (first processing mode for high accuracy requiring camera and sensor group, second processing mode for basic functionality) based on the operational status of the camera and sensor group. This allows the system to adapt its processing requirements to current component availability, ensuring continuous AR image display while adjusting accuracy levels according to component health.
2Measurement precision
If the camera and sensor group are used for accurate AR image creation, then the AR image quality is improved, but the system complexity increases due to multiple components
Solution Approach 1:
The system extracts and separates the essential AR image display function from the optional high-accuracy enhancement functions. By identifying that basic AR display can function with simplified processing (second processing mode) without requiring all components, the system isolates the core functionality from the enhancement components, allowing operation even when some components are abnormal.
3Use of energy by moving object
If power saving measures are implemented by lowering camera measurement frequency, then power consumption is reduced, but the system cannot continue AR image display when camera abnormality occurs
Solution Approach 1:
The system implements dynamic operational modes where the camera and processing intensity are adjusted based on actual needs and component status. Rather than using a fixed low-frequency measurement mode for power saving, the system can switch to a second processing mode that maintains AR display continuity with reduced resource requirements when abnormalities occur, optimizing both power consumption and reliability across different operational states.
Data Source
AI summary
Examples include a head-mounted display having a camera imaging an external landscape, a display for displaying an image, a controller switching a processing mode generating the image, and a near field communication interface for transmitting and receiving from a portable information terminal. The controller is configured to switch between a first augmented reality (AR) processing mode of generating a first AR image and a second AR processing mode of generating a second AR image, in correspondence with a connection with the portable information terminal or a battery residual capacity of the portable information terminal, which is received through the near field communication interface. The first AR image is an augmented reality image generated by the head-mounted display. The second AR image is an augmented reality image generated by the portable information terminal after transmitting image data captured by the camera through the near field communication interface.