Dual-Alidade Surveying Layout for Accurate Scanner-Camera Alignment
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Solution Overview
Problem
Existing surveying systems face challenges in combining data from distance measuring scanners and visual cameras with sufficient quality and accuracy.
Innovation Solution
The system employs two optical instruments mounted on separate alidades, with their axes of rotation substantially coinciding, allowing independent rotation and coordinated operation to enhance data combination accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If two optical instruments are mounted on the same alidade, then the device complexity is reduced, but the measurement precision and data combination accuracy deteriorate due to coupled rotation movements
Solution Approach 1:
The patent divides the mounting structure into separate alidades (first alidade and second alidade) for the scanner and camera respectively, allowing independent rotation control of each instrument while maintaining a shared coordinate system origin, thus resolving the data combination accuracy issue without excessive complexity
Solution Approach 2:
The patent introduces a common origin point O as an intermediary reference that both alidades share, enabling precise coordinate transformations between the scanner and camera data systems while maintaining independent rotation capabilities
2Measurement precision
If two optical instruments are mounted on separate alidades with independent rotation, then the measurement precision and operational flexibility improve, but the device complexity increases
Solution Approach 1:
The patent merges the coordinate system origins of both alidades at a common point O, creating a unified reference framework that simplifies data integration while preserving the benefits of independent rotation and operational flexibility
3Measurement precision
If the axes of rotation of two alidades exactly coincide, then the coordinate transformation accuracy improves, but the manufacturing precision requirements and cost increase
Solution Approach 1:
The patent ensures that only the critical region at the origin point O requires high-precision alignment, while other parts of the alidades can have relaxed manufacturing tolerances, optimizing the balance between accuracy and cost
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enables high-quality and accurate integration of measurement data from both types of instruments, facilitating precise coordinate transformations and reduced computational complexity in image stitching.
Implementation Method 1
a scanner for performing distance measurements using a beam of measuring light emitted from a rotating mirror towards distant objects, wherein light received back from the distant objects is detected
Implementation Method 2
performing distance measurements using a beam of measuring light emitted from a rotating mirror towards distant objects, wherein light received back from the distant objects is detected in order to determine the distances
Data Source
AI summary
A surveying system comprises a base 3, a first alidade 7 mounted on the base and rotatable relative to the base about a first axis 9, a first optical instrument 17 mounted on the first alidade 7, wherein the first optical instrument is configured to emit a first beam 41 of measuring light, a second alidade 19 mounted on the base and rotatable relative to the base about a second axis 21, and a second optical instrument 25 mounted on the second alidade, wherein the second axis substantially coincides with the first axis. The first optical instrument includes a scanner 31, and the second optical instrument includes at least one camera 63.