Building information modeling (BIM) augmented reality lofting system based on electronic total station and photogrammetric technology

Abstract

The invention relates to a measuring technology, and discloses a building information modeling (BIM) augmented reality lofting system based on an electronic total station and a photogrammetric technology. The BIM augmented reality lofting system comprises an augmented reality device, the electronic total station, a positioning device and a to-be-measured marker, wherein the to-be-measured marker or the augmented reality device is fixed with the positioning device; at least four optical identification points are arranged on on the electronic total station; the positioning device comprises a camera; the camera is used for acquiring images of the optical identification points, arranged on the electronic total station, in the camera, calculating the relative attitudes of the optical identification points and the positioning device, and calculating the attitude of the positioning device in an engineering measurement coordinate system according to the relative attitudes of the optical identification points and the positioning device; the electronic total station is used for acquiring coordinates of the positioning device; the augmented reality device is used for calculating the coordinates, elevation and attitude of the to-be-measured marker or the augmented reality device in the engineering measurement coordinate system according to the relative distance and attitude of the to-be-measured marker or the augmented reality device and the positioning device, thus realizing fusion of coordinates.

Description

technical field [0001] The invention relates to measurement technology, in particular to a BIM augmented reality lofting system based on total station and photogrammetry technology. Background technique [0002] BIM is the abbreviation of Building Information Modeling, which is usually translated as Building Information Modeling. BIM is an information management technology for the whole life cycle of a building, which has five characteristics of visualization, coordination, simulation, optimization and drawing. BIM is a brand-new method of architectural design, construction, and management. Based on three-dimensional digital information technology, all data in planning, design, construction, and operation stages are included in the 3D model, allowing the entire life cycle of the building to When using the model, workers at any stage in the process can make effective and correct decisions based on accurate and complete data. [0003] At present, the 3D model of BIM can only...

AI Technical Summary

Problems solved by technology

The requirement of measuring multiple data for each marker and the characteristics of total station measurement technology make the layout of multiple markers inefficient and inaccurate, which affects the promotion of IO-based marked augmented reality technology

[0010] The OI-based augmented reality system with markers only realizes the tracking of the relative displacement and attitude angle change of the augmented reality device relative to the tracking scene; the augmented reality system without marker tracking and registration can solve the relative displacement and attitude of the augmented reality camera relative to the natural scene The angle changes, but the camera position and attitude cannot be located by registering the coordinates of the feature points in the natural scene image or the reconstructed scene model in the engineering measurement coordinate system

In essence, a temporary coordinate system is established for each positioning registration, and the absolute coordinates and attitude of the augmented reality device in the engineering measurement coordinate system cannot be calculated, so that the three-dimensional coordinates of the model in BIM and the engineering measurement coordinate system cannot be established. The corresponding relationship directly affects the practice and application of augmented reality technology in construction, municipal and other industries

[0011] In order to achieve accurate superimposition of BIM models according to the engineering measurement coordinate system, there is a prerequisite: the initial coordinates and attitudes of markers and augmented reality devices in the engineering measurement coordinate system need to be accurately measured. However, there is no such method in the prior art, so that On-site construction stakeout is still guided by the marked dimensions on the 2D drawings, which makes the designer spend a lot of time and energy to mark the 3D positioning information in the BIM model as the dimensions on the 2D drawings after the BIM model is built. Very inconvenient to use

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