AR Headset Overlaying BIM for Construction Site Accuracy
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Solution Overview
Problem
Construction sites face inefficiencies due to the lack of timely and accurate access to information, leading to costly mistakes and delays, as existing technologies fail to provide a portable and reliable augmented reality system for displaying building information models in real-time.
Innovation Solution
A system comprising a network, system administrator, database, registration markers, and user devices with wearable computers and headsets that project a stereoscopic building information model, allowing users to view accurate information in real-time by determining their position and orientation using registration markers and motion data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If paper drawings or laptop computers are used to access construction information, then information can be viewed, but the information is not displayed to scale and viewing is difficult leading to mistakes
Solution Approach 1:
The patent creates a virtual copy of the building information model that is overlaid onto the physical construction environment. This virtual model is displayed through augmented reality headsets, allowing workers to view accurate scaled representations of construction plans directly in their field of view, eliminating the need to interpret two-dimensional paper drawings or small laptop screens.
Solution Approach 2:
The patent transitions from two-dimensional paper drawings and laptop displays to three-dimensional augmented reality visualization. By overlaying the virtual building information model onto the physical space, workers can view construction information in its proper spatial context and scale, making measurements and spatial relationships immediately apparent without mental transformation.
2Reliability
If a consolidated building information model is employed, then coordination of tasks and schedules is improved, but the BIM is not easily accessible in the field and does not address schedules or query times
Solution Approach 1:
The augmented reality headset system serves multiple functions: it displays the building information model, provides scheduling information, answers queries about construction elements, and guides workers through tasks. By integrating these diverse functions into a single wearable device, the system makes comprehensive construction information easily accessible in the field while maintaining reliable coordination capabilities.
Solution Approach 2:
The augmented reality headset acts as an intermediary between the centralized building information model and the field worker. It retrieves and displays relevant information from the BIM database, translates complex data into visual overlays, and provides real-time guidance, making the otherwise inaccessible BIM data readily available and understandable at the construction site.
3Productivity
If heavy equipment is scheduled to be on site at specific times, then project efficiency is maximized, but errors in subtasks require equipment to be stored or rescheduled quickly leading to increased costs and delays
Solution Approach 1:
The system provides preliminary guidance by overlaying installation instructions, location markers, and preparation requirements directly in the worker's field of view before equipment arrives. This allows workers to prepare the site and complete prerequisite tasks in advance, ensuring that when heavy equipment arrives at the scheduled time, everything is ready for immediate work, eliminating idle time and rescheduling needs.
Solution Approach 2:
The augmented reality system provides real-time feedback about task completion status, quality checks, and readiness indicators. Workers can verify that all subtasks are correctly completed before equipment arrival, and the system can alert supervisors to any issues that need correction, preventing errors that would otherwise cause equipment delays and additional costs.
Data Source
AI summary
A preferred system and method for displaying a building information model includes a system administrator, and a headset unit removably attached to a construction hardhat via a set of clips. The headset further includes a set of stereo cameras. The cameras capture an image of the construction site to orient the user view and overlay an image. A position of the headset is determined relative to a registration marker using the cameras and motion sensors. The overlayed image is projected to the display based on the position and orientation of the headset.