Reflecting Prism Surveying Using Surface Plane Intersection
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Solution Overview
Problem
Existing surveying methods using light-reflecting targets are inefficient and prone to errors due to inaccurate positioning and assumptions about vertical laser scanning, which can lead to incorrect coordinate measurements.
Innovation Solution
A surveying apparatus that measures a light-reflecting target by receiving positioning data using laser light, calculates a plane based on multiple points surrounding the target, and determines the target's position on a set-up surface, allowing for accurate coordinate calculation regardless of target tilt or initial setup errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If laser scanning is performed by rotating the optical system in a horizontal plane while vertically rotating, then the surveying operation can be performed, but laser scanning is performed along a slightly slanted line causing error in obtaining coordinates of a point vertically immediately below the reflecting prism
Solution Approach 1:
The patent introduces a vertical dimension to the laser scanning process by performing scanning in both horizontal and vertical directions. This creates a three-dimensional scanning pattern that allows the system to distinguish between horizontal and vertical components, thereby correcting the slanted line scanning error and accurately determining the coordinates of points vertically below the reflecting prism.
Solution Approach 2:
The patent employs feedback mechanisms where the surveying apparatus measures the position of the reflecting prism and uses this information to calculate the actual vertical position. By comparing the expected vertical position with the measured position, the system corrects for scanning errors and obtains accurate coordinates despite the slanted scanning path.
2Measurement precision
If the position of the reflecting prism is determined by laser scanning along a vertical plane, then coordinates can be obtained, but the method assumes vertical scanning which is not accurate in actual horizontal rotation with vertical rotation
Solution Approach 1:
The patent makes the scanning system dynamic by allowing the optical system to rotate in both horizontal and vertical directions during the scanning process. This dynamic scanning approach adapts to the actual motion capabilities of the surveying apparatus while maintaining measurement accuracy through computational correction based on the known geometry of the reflecting prism and measured positions.
3Reliability
If traditional surveying methods are used with reflecting prism devices, then positioning can be performed, but the work is complicated and incorrect values are obtained in some cases
Solution Approach 1:
The patent enables the surveying apparatus to automatically determine the position of the reflecting prism and calculate the coordinates of points below it without requiring complex manual setup or pre-determined positioning. The system self-calibrates by measuring the reflecting prism position and using this information to compute accurate coordinates, eliminating the need for complicated preliminary work and reducing setup complexity.
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
Enables efficient and accurate surveying operations by eliminating the need for precise initial setup and correcting for target tilt, reducing workload and ensuring precise coordinate determination.
Implementation Method 1
a surveying apparatus measures the position of the reflecting prism by using laser light
Implementation Method 2
a light-reflecting target, such as a reflecting prism device
Data Source
AI summary
A technique for enabling efficient surveying operation that uses a light-reflecting target is provided. A surveying apparatus is configured to survey a reflecting prism and includes a controller, a surface calculator, and a position calculator. The controller performs positioning on three or more points on the set-up surface on which the reflecting prism is set up, by using laser light. The surface calculator calculates a plane of the set-up surface based on the positioning data of the three or more points in a case in which the position of the reflecting prism is surrounded by the three or more points in terms of a horizontal plane. The position calculator calculates a point of intersection of the plane and a straight line from the position of the reflecting prism to the plane, as a position on the set-up surface, at which the reflecting prism is set up.