XR-Based MEP Design Device for BIM Coordinate Calibration
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Solution Overview
Problem
Positional errors between virtual and actual construction sites in building information modeling (BIM) for mechanical, electrical, and plumbing (MEP) facilities lead to construction delays and increased costs, as field workers need to correct errors in BIM data generated in a virtual space.
Innovation Solution
An automatic design device for extended reality (XR)-based MEP facilities, equipped with a communication unit, position calibration unit, position tracking unit, video capturing unit, user monitoring unit, and BIM data generator, which receives 3D construction site data, calibrates coordinates, tracks positions, captures videos, and generates virtual MEP facility data to connect specified installation points while minimizing errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If BIM data is generated in a virtual space based on 3D data, then the design process can be performed remotely, but positional errors occur between the virtual construction site and the actual construction site
Solution Approach 1:
The system captures real-time video of the actual construction site and overlays it with the virtual BIM model, allowing operators to visually compare and identify positional discrepancies. This feedback loop enables continuous adjustment of the virtual model to match the physical site, resolving the coordinate accuracy issue while maintaining remote design capability
Solution Approach 2:
The patent introduces an intermediary registration process that uses feature point matching between the captured video and the virtual BIM model. This intermediary step acts as a bridge to align the coordinate systems of the virtual and physical spaces, eliminating positional errors without requiring direct physical presence
2Measurement precision
If field workers request BIM data corrections repeatedly due to positional errors, then accuracy can be improved, but construction delays and excessive costs occur
Solution Approach 1:
The system performs preliminary coordinate calibration and registration by capturing the construction site and matching it with the BIM model before construction begins. This preliminary action ensures that the BIM data is accurately aligned with the physical site from the start, preventing the need for repeated corrections and avoiding construction delays
Solution Approach 2:
The patent replaces the manual iterative correction process with an automated computer vision system that uses video capture, feature point detection, and algorithmic registration. This substitution eliminates the need for repeated human intervention and BIM data re-generation, significantly reducing time loss while maintaining high accuracy
3Measurement precision
If the automatic design device tracks position in real-time, then positional errors can be minimized, but device complexity increases
Solution Approach 1:
The automatic design device integrates multiple functions into a single system: video capture, feature point detection, coordinate tracking, and BIM model registration. By making the device multi-functional, the patent achieves real-time position tracking without requiring separate complex subsystems, thus minimizing positional errors while controlling overall device complexity
Data Source
AI summary
Presented are an automatic design device for XR-based MEP facilities, and a method therefor, the device comprising: a position calibration unit for calibrating, to the current position of the automatic design device for XR-based MEP facilities in 3D construction site structure data, coordinates corresponding to a preset location in 3D construction site structure data including structure and coordinate information about a construction site, if the automatic design device for XR-based MEP facilities is located at the preset location of the construction site; and a location-tracking unit for tracking the location of the automatic design device for XR-based MEP facilities in the 3D construction site structure data on the basis of the current location when a user wearing the automatic design device for XR-based MEP facilities moves.