Calibration Cradle for 3D Scanner with Automated Pattern Plate
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Solution Overview
Problem
Conventional handheld three-dimensional scanners face challenges in calibration accuracy due to optical path issues within the scanner's tip case, which can be affected by foreign substances and require manual operation of pattern plates, making calibration time-consuming and unreliable.
Innovation Solution
A calibration cradle that allows the three-dimensional scanner to be seated with the tip case removed, featuring a pattern plate that automatically moves axially and rotationally to maintain the optical axis path, ensuring accurate calibration and improving user convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the tip case including the reflection mirror is used during calibration, then the scanner structure is complete, but calibration accuracy decreases due to optical path interference from foreign substances and reversal phenomena
Solution Approach 1:
The patent removes the tip case including the reflection mirror from the scanner before calibration. By extracting the problematic optical component that causes reversal phenomena and foreign substance interference, the calibration process can proceed with an unobstructed optical path, directly improving measurement precision while eliminating the harmful optical interference
Solution Approach 2:
The patent introduces a calibration-specific optical path that bypasses the tip case reflection mirror. This intermediary calibration mode allows light to travel directly from the light source through the scanner's internal optics to the pattern plate without passing through the problematic tip case interface, thus mediating between the need for complete scanner structure and avoiding optical interference
2Ease of operation
If the pattern plate is manually operated at various distances and angles, then calibration can be performed, but user convenience decreases and calibration accuracy is difficult to guarantee
Solution Approach 1:
The patent implements an automated pattern plate moving unit that dynamically adjusts the pattern plate's position and orientation. This dynamic automation replaces manual operation, allowing the system to precisely control the pattern plate at various distances and angles while eliminating human error and improving both ease of operation and calibration accuracy
Solution Approach 2:
The calibration system performs self-calibration through automated control. The pattern plate moving unit automatically positions the pattern plate according to pre-programmed sequences, and the system autonomously captures images and processes calibration data without requiring manual intervention, thereby improving both user convenience and ensuring consistent calibration accuracy
3Productivity
If manual operation of the pattern plate is required, then the device structure is simpler, but calibration time increases and productivity decreases
Solution Approach 1:
The patent pre-programs the pattern plate movement sequences and calibration procedures. Before actual calibration begins, the system prepares the automated moving unit with predetermined motion paths, positions, and timing sequences. This preliminary setup enables rapid automated execution during calibration, significantly increasing productivity while the added device complexity is justified by the automation benefits
Solution Approach 2:
The patent replaces manual mechanical operation with an automated motor-driven pattern plate moving unit. This substitution eliminates the need for users to manually move the pattern plate to various positions, thereby dramatically reducing calibration time and increasing productivity. The added mechanical complexity of the automated system is offset by the substantial gains in calibration speed and consistency
Data Source
AI summary
The present invention relates to a calibration cradle for a three-dimensional scanner. Particularly, the calibration cradle comprises: a cradle body into which a front end portion of a three-dimensional scanner is inserted and seated; a calibration pattern plate (hereinafter, abbreviated as “pattern plate”) which is disposed inside the cradle body to correct the scanning of the three-dimensional scanner; and a pattern movement part which automatically axially rotates and axially reciprocates the pattern plate in the cradle body when the three-dimensional scanner is coupled to the cradle body, whereby the present invention provides an advantage of improving the convenience and reliability of performing calibration.