Optical Device Reticle for Large Cylindrical Structure Centering
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Solution Overview
Problem
Existing optical devices struggle to accurately measure the central coordinates of large-diameter cylindrical structures, such as building piles, when the device cannot maintain a sufficient distance due to the narrow angle of view, making it difficult to project both edges of the structure onto the reticle simultaneously.
Innovation Solution
The optical device employs a reticle with a plurality of concentric circles around the optical axis, allowing for the measurement of central coordinates by aligning one reference mark with the edge of the structure and positioning the optical axis on its surface, even when the structure's edges cannot be fully projected, using a reticle with specific radii and reference marks to determine the coordinates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a conventional reticle with limited field of view is used, then the device structure remains simple, but both edges of large-diameter cylindrical structures cannot be projected onto the reticle simultaneously when the device is close to the structure
Solution Approach 1:
The reticle is divided into multiple fields of view, with each field containing a subset of reference marks. The system segments the observation task across multiple reticle views, allowing comprehensive coverage of large-diameter structures through sequential observation and coordinate transformation between fields.
Solution Approach 2:
Multiple fields of view are nested within a single reticle structure, with each field containing reference marks suitable for specific angular separations. This nested arrangement allows the reticle to handle both close-range measurements of large structures and far-range measurements of smaller structures through appropriate field selection.
2Measurement precision
If the survey instrumentation keeps enough distance from the pile to satisfy measurement requirements, then both edges can be projected onto the reticle, but it becomes difficult to determine central coordinates of large-diameter piles at construction sites where buildings are concentrated
Solution Approach 1:
The system dynamically adapts the measurement approach based on the angular separation between structure edges. When edges are within the same field of view, direct measurement is used. When edges span multiple fields, the system dynamically switches to multi-field coordinate transformation methods, allowing precise measurement regardless of distance constraints.
Solution Approach 2:
The system changes the measurement parameters by using different reference mark combinations and coordinate transformation approaches depending on the geometric relationship between the instrument and the structure. This allows accurate central coordinate determination whether the instrument is close to or far from the structure.
3Length of moving object
If a narrow angle of view telescope is used, then the device structure remains compact, but it is difficult to include both right and left edges of the columnar body in one image when close to the structure
Solution Approach 1:
The system transitions from a two-dimensional single-field measurement approach to a multi-dimensional approach by incorporating multiple fields of view on the reticle. This dimensional expansion in the reticle design allows the compact telescope to effectively observe and measure structures that would otherwise require a larger aperture or greater distance.
Data Source
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AI summary
Disclosed herein is an optical device that determines the central coordinates of a large-diameter cylindrical structure. The optical device has the function of calculating the central coordinates of a cylindrical structure using the coordinates of a reference point of the optical device, the coordinates of a survey point on the cylindrical structure seen on the optical axis of a telescope in a state where one of right and left reference marks (e.g., a vertical line) coincides with the edge of the cylindrical structure and the optical axis is positioned on the surface of the cylindrical structure, and an aperture angle between the optical axis and the reference mark.