Virtual Measuring Mark for Machine Calibration
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Solution Overview
Problem
Existing measuring mark systems for calibrating machines with movable heads face challenges in accurately compensating for manufacturing inaccuracies and environmental influences like temperature fluctuations, particularly due to the risk of collisions between measuring marks and moving parts during operation.
Innovation Solution
A measuring mark system that generates a virtual reference mark using imaging optics, allowing the scanning unit to detect its position relative to the machine head without the need for a physical mark on the processing plane, thereby avoiding collisions and enabling precise calibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a physical measuring mark is positioned on the processing plane for calibration, then the scanning unit can detect its position accurately, but the measuring mark collides with moving parts during machine operation
Solution Approach 1:
The patent creates a virtual copy of the physical measuring mark by projecting its image onto the processing plane using imaging optics. The scanning unit detects this virtual image (virtual measuring mark) instead of the physical mark itself, enabling accurate position detection without the physical mark being present in the processing plane, thus eliminating collision risk while maintaining measurement precision
Solution Approach 2:
The imaging optics act as an intermediary between the physical measuring mark and the scanning unit. The physical mark is positioned away from the processing plane, and the imaging optics project its image onto the processing plane, allowing the scanning unit to detect the virtual image as if the mark were physically present, thereby resolving the contradiction between detection accuracy and collision avoidance
2Reliability
If the measuring mark is positioned away from the processing plane to avoid collisions, then collision risk is reduced, but the scanning unit cannot accurately detect its position
Solution Approach 1:
The patent creates a virtual copy of the physical measuring mark by projecting its image onto the processing plane using imaging optics. The scanning unit detects this virtual image (virtual measuring mark) instead of the physical mark itself, enabling accurate position detection without the physical mark being present in the processing plane, thus eliminating collision risk while maintaining measurement precision
Solution Approach 2:
The imaging optics act as an intermediary between the physical measuring mark and the scanning unit. The physical mark is positioned away from the processing plane, and the imaging optics project its image onto the processing plane, allowing the scanning unit to detect the virtual image as if the mark were physically present, thereby resolving the contradiction between detection accuracy and collision avoidance
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
This solution allows for precise compensation of measurement errors and reduces the risk of collisions, achieving more accurate and reliable machine calibration by using a virtual measuring mark that can be detected independently of the real mark's position, thus improving positional accuracy and reducing measurement errors.
Implementation Method 1
imaging optics, by means of which electromagnetic radiation generated by the scanning unit interacts with the at least one reference mark to generate a virtual reference mark in an imaging plane at a distance from the reference mark
Data Source
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Figure 3~4B
Figure 5
AI summary
The invention relates to a measuring mark system for calibrating a machine, which has a machine head (S) that is movable along at least one spatial direction (y) during operation and can be positioned by means of a positioning device, with at least one measuring mark (1) that is intended to be attached to the machine, and with a scanning unit (3) for detecting the at least one measuring mark (1), wherein the scanning unit (3) is intended to be arranged on the machine such that it is movable together with the measuring head (S) relative to the measuring mark (1). An imaging optic (6, 10, 10', 12, 14, 16, 18) is associated with the measuring mark (1), by means of which the measuring mark (1) is imaged into an imaging plane (A) spaced apart from the measuring mark (1), generating a virtual measuring mark (2), wherein the scanning unit (3) is configured to optically scan the virtual measuring mark (2).