Inclined Reference Structures for Curved Surface Measurement
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Solution Overview
Problem
Existing devices for geometric measurement of objects, particularly those with strongly curved or large surfaces, face challenges in maintaining measurement accuracy and speed due to signal collisions and shadowing, and struggle to adapt to varying surface contours without compromising spatial dimensions.
Innovation Solution
A device with a carrier and holder system that allows for precise measurement of objects using inclined reference structures and sensors, enabling non-contact, high-resolution scanning of curved surfaces by adjusting the alignment of reference sensors to avoid shadowing and increase radial measuring range without increasing device dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the distance between the reference sensor and the object surface is decreased to improve measurement resolution, then measurement precision is improved, but signal shadowing and collision increase
Solution Approach 1:
The patent introduces a radial direction (x-direction) as an additional dimension beyond the traditional axial direction (z-direction). The holder is made movable in both axial and radial directions, allowing the distance measuring device to approach the object surface from multiple spatial angles. This dimensional expansion enables the system to maintain small measurement distances while avoiding shadowing by adjusting the radial position of the sensor relative to the object's curvature.
2Adaptability or versatility
If the device dimensions are increased to accommodate reference sensors for highly curved surfaces, then measurement capability is improved, but device complexity and spatial dimensions increase
Solution Approach 1:
The patent implements dynamic positioning capabilities where the holder can be moved independently in both axial and radial directions. This dynamic adjustment allows the distance measuring device to adapt its position and orientation to match the local surface geometry of highly curved objects. The system can dynamically compensate for surface curvature variations without requiring a physically larger device structure, maintaining compact dimensions while achieving high adaptability.
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 reliable, precise, and quick measurement of strongly curved surfaces and large objects while maintaining measurement accuracy and speed, avoiding signal collisions and shadowing, and allowing for increased radial measuring range without expanding the device's spatial dimensions.
Implementation Method 1
The distance sensors 36, 38 are optical distance sensors and are therefore designed to emit and detect light signals. The sensors 36, 38 measure in reflection geometry. This means that a measuring beam directed at a measuring point 17 of the object 14 is reflected and mirrored back in accordance with the surface contour of the object 14
Data Source
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AI summary
The invention relates to a device and method for geometrically measuring an object (14), comprising: - a carrier (12) for the object (14), which defines an axial direction (z) and a radial direction (x), - a holder (26), which is movable relative to the carrier (12) in respect of the axial direction (z) and in respect of the radial direction (x) and has a distance measuring device (30), - at least one reference object (18, 19, 20), which is fixable relative to the carrier (12), - wherein a first longitudinally extended reference structure (22) and a second longitudinally extended reference structure (24) are arranged on either holder (26) or reference object (18, 19, 20) and - wherein a first reference sensor (32), aligned to the first reference structure (22), and a second reference sensor (34), aligned to the second reference structure (24), are arranged on the other of the holder (26) or reference object (18, 19, 20), and wherein at least the second or the second and the first reference structure (22, 24) is or are aligned about a prescribed angle, both relative to the radial direction (x) and relative to the axial direction (z).