Dual-Reference Sensor Geometry Measurement Collision Avoidance
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Solution Overview
Problem
Existing geometric measurement apparatuses face challenges in accurately measuring objects with strongly curved surfaces due to restricted design freedom, which can lead to collisions and measurement inaccuracies, especially when dealing with non-rotationally symmetric objects like cylindrical lenses.
Innovation Solution
The apparatus employs at least two reference sensors on the same side of the holder or reference body to measure distances to a reference object, allowing for tilt correction and increased design freedom, enabling precise alignment and position determination of the holder and distance measuring device, even in the presence of small inclinations or tilts, thus avoiding collisions and maintaining measurement accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the distance measuring device is positioned close to the object for high-resolution measurement, then measurement precision is improved, but the risk of collision between the reference body and the object increases
Solution Approach 1:
The patent transitions from a single-side reference body configuration to a dual-side configuration with reference bodies on both sides of the holder. This spatial dimensionality change allows the reference measurement system to operate independently from the object measurement system, eliminating collision risks while maintaining measurement precision through the second reference body's geometric relationship with the first
2Adaptability or versatility
If the reference body is positioned to scan the entire cross-sectional contour of the object, then measurement coverage is improved, but the alignment and orientation requirements become more complex
Solution Approach 1:
The patent uses a second reference body that is a precise copy or replica of the first reference body. This copying approach allows the system to achieve comprehensive measurement coverage through the geometric correspondence between the two reference bodies, while the alignment complexity is reduced because the second reference body's position and orientation can be determined relative to the first through their identical geometric features
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 configuration allows for reliable collision avoidance and high-precision geometric measurement of objects with complex surfaces, ensuring accurate distance measurements and surface imaging without compromising measurement accuracy, even for non-rotationally symmetric objects.
Implementation Method 1
The distance sensors 34, 36 are embodied as optical distance sensors and hence embodied to emit and detect light signals. The sensors 34 and 36 measure in reflection geometry.
Data Source
AI summary
A device and method for geometrically measuring an object includes a carrier for the object, at least one reference object that can be fixed relative to the carrier, and a holder which can be moved in at least one direction (x,z) relative to the reference object and on which a reference body and a distance measuring device are arranged, which distance measuring device is designed for measurement of a distance between the object and the reference body. A first and a second reference sensor are arranged at a distance from each other on the holder or on the reference body while facing the reference object, said reference sensors being designed to measure a first and a second distance to the reference object.