Engineering Projection Deformation Control with Compensation Planes
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Solution Overview
Problem
Traditional projection deformation control methods struggle to maintain precision and consistency in engineering measurement, especially in areas with large height differences, leading to inaccurate measurement data and challenges in construction projects.
Innovation Solution
A method and device for controlling engineering projection deformation by calculating the change rate of length deformation functions based on known coordinates, solving for the distance between meridians, and performing comprehensive projection deformation compensation using a compensation projection plane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional projection deformation control methods are used, then the measurement process is simple, but the measurement precision deteriorates in areas with large height differences
Solution Approach 1:
The patent introduces a compensation projection plane with adjustable elevation angle as a new parameter to control projection deformation. By changing the elevation angle of the compensation projection plane based on the height difference between the elevation plane and reduction projection plane, the system achieves precise deformation control without complicating the overall measurement process.
Solution Approach 2:
The patent uses a compensation projection plane as an intermediary between the elevation plane and reduction projection plane. This intermediate projection plane facilitates the transformation and compensation of deformation effects, enabling precise measurement control while maintaining operational simplicity.
2Measurement precision
If the same reduction benchmark is used for all areas, then the operation process is unified, but the measurement precision deteriorates in areas with obvious topographic height differences
Solution Approach 1:
The patent applies local quality adjustment by introducing a compensation projection plane with elevation angle specific to each region's topographic characteristics. The elevation angle is calculated based on the height difference between the elevation plane and reduction projection plane for each specific area, allowing tailored deformation compensation that maintains measurement precision while keeping the operation process unified.
3Measurement precision
If projection deformation is not compensated, then the measurement process is fast, but the measurement precision deteriorates due to systematic errors
Solution Approach 1:
The patent performs preliminary calculation of the compensation projection plane elevation angle before the actual measurement process. By pre-calculating the elevation angle based on the height difference between elevation plane and reduction projection plane, the system eliminates the need for time-consuming real-time compensation calculations, thereby maintaining measurement precision without significant time loss.
Data Source
AI summary
A method for controlling engineering projection deformation includes: calculating, based on known coordinates of an engineering key region, a change rate of a length deformation function per kilometer in a first direction caused by a height difference of the engineering key region and a change rate of the length deformation function per kilometer in the first direction caused by a distance from a central meridian of a Gaussian projection zone of the engineering key region; solving a distance between a meridian where a center of the engineering key region is located and a new central meridian; solving an elevation of a compensation projection plane; and performing comprehensive projection deformation compensation based on the elevation of the compensation projection plane and the distance between the meridian where the center of the engineering key region is located and the new central meridian, so as to realize the controlling of engineering projection deformation.