Correction Device Using Reference Geometry for Moving Scanners
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Solution Overview
Problem
Existing correction devices fail to correct interference data caused by the movement of data acquisition devices, such as scanners on robot arms, due to vibrations and stick-slip effects, leading to inaccurate geometric data acquisition.
Innovation Solution
A correction device with a reference geometry within the scanning range of the data acquisition device, combined with an evaluation device, continuously acquires and corrects geometric data using known reference geometric data to eliminate interference and offsets.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the data acquisition device moves to scan large objects or multiple objects, then the scanning coverage and versatility are improved, but interference data from vibrations and stick-slip effects occur
Solution Approach 1:
A reference geometry serves as an intermediary object that is scanned simultaneously with the target object. This reference geometry provides known geometric data that acts as a mediator to identify and correct interference patterns in the scanned data, allowing the system to maintain data accuracy while moving the data acquisition device.
Solution Approach 2:
The system implements feedback by comparing the scanned reference geometry data against known reference geometric data. The evaluation device uses this comparison to generate correction information that is fed back to correct the geometric data of the target object, thereby compensating for vibrations and stick-slip effects that occurred during scanning.
2Ease of manufacture
If previous correction devices were used for calibration, then initial setup was simplified, but they cannot correct interference data during movement
Solution Approach 1:
The reference geometry is pre-configured with known geometric data before scanning begins. This preliminary preparation allows the evaluation device to immediately compare scanned data against the known reference during movement, enabling real-time correction without requiring complex recalibration procedures.
Solution Approach 2:
The reference geometry serves multiple functions: it acts as a calibration reference for initial setup and simultaneously serves as a real-time correction reference during movement. This multi-functionality eliminates the need for separate correction mechanisms while maintaining both calibration simplicity and interference correction capability.
3Reliability
If the reference geometry is placed within the scanning range, then continuous correction is enabled, but the scanning range must accommodate additional objects
Solution Approach 1:
The scanning process is segmented into reference geometry scanning and target object scanning. The reference geometry is positioned in a separate area that can be scanned independently or simultaneously with the target object, allowing continuous correction without significantly increasing the total scanning range required for the primary target.
Data Source
AI summary
The invention relates to a correction device for a movable data acquisition device for acquiring geometric data of an object, comprising at least one reference geometry for at least partial disposition within a scanning range of the data acquisition device, and an evaluation device for correcting the geometric data on the basis of reference geometric data of the reference geometry acquired by the data acquisition device.