Total Station Registration via CAD Plane Equations
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Solution Overview
Problem
Existing methods for registering a total station in a CAD model require known control points, which complicates the process and limits flexibility.
Innovation Solution
A method that selects three non-parallel surfaces in the CAD model, determines plane equations, aligns the total station at their intersection, and uses measured points to establish a transformation function between the total station and CAD model reference systems, allowing registration without known control points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If known control points are used for registering the total station, then the registration accuracy is improved, but the process complexity and time consumption increase
Solution Approach 1:
The invention extracts the essential geometric information (three non-coplanar points) from the complex control point system. Instead of requiring multiple control points with known coordinates, the method only needs three points that define a plane, significantly reducing the time-consuming setup while maintaining registration accuracy through plane equation-based transformation.
Solution Approach 2:
The method creates a mathematical copy of the spatial relationship through plane equations. By establishing a plane through three points and using its equation to transform coordinates, the system replicates the registration function without requiring physical control points, thus reducing time consumption while preserving accuracy.
2Measurement precision
If known control points are used for registering the total station, then the registration accuracy is improved, but the device complexity and operational difficulty increase
Solution Approach 1:
The invention extracts only the necessary elements (three non-coplanar points) from the complex control point system. This simplification reduces the operational steps and equipment setup complexity while maintaining registration accuracy through the mathematical plane equation approach.
Solution Approach 2:
The method replaces the mechanical/control point-based registration system with a mathematical computation system. Instead of physically setting up control points and performing complex coordinate transformations, the system uses plane equations and coordinate geometry to achieve the same registration function with simpler operations.
3Reliability
If traditional control point methods are used, then reliable registration is achieved, but the adaptability to different measurement environments is reduced
Solution Approach 1:
The plane equation-based method serves multiple functions across different environments. The same mathematical approach works for indoor and outdoor measurements, various total station positions, and different target configurations, making the registration process universally applicable while maintaining reliability through consistent geometric principles.
Solution Approach 2:
The method changes the fundamental parameters from control point coordinates to plane equation coefficients. This parameter transformation allows the system to adapt to different measurement environments by simply changing the three defining points, while the underlying mathematical framework remains consistent, ensuring reliability across diverse applications.
Data Source
AI summary
A method for registering a total station, which is deployed in a measurement environment with one or more objects, in the reference system of a computer-aided design (CAD) model, which images the one or more objects of the measurement environment, includes registering the total station by a control device.